Tuesday, June 24, 2008

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Binoculars – Nothing Escapes These Eyes
Author: Sharon Albright -
Binoculars are devices that make small objects at a distance appear expanded and clear before your eyes. They are also known as binocular telescopes as they are basically two monocular placed together to allow perfect two-eye viewing. It is surprising to find that those objects, which are completely invisible to human eyes, appear so near and enlarged in the eyes of the binoculars.

Factors to consider while purchasing binoculars

When you want to choose the binoculars you should try them out and then purchase them. Although the enhanced image through binoculars might appear surprising, yet the working of binoculars is quite simple. You have the lenses at the end of the barrel called objective lens that gathers the light from distant objects and focuses it on the lens nearest to your eyes. With side-by-side two small telescopes fitted, the binoculars impart a great measure of depth of field, than single monocular glasses.

When you go to purchase binoculars you will be confused to hear two specific numbers "6 x30" or something similar. Do not get surprised. The first number always refer to the magnification power of the binoculars or how many times the image is magnified. This means that if the number is 6, the image that you view through the lens will be 6 times more magnified than its normal size.

However, the second number deals with the size of the objective lens at the end of the binoculars. You should know that the larger the diameter of the objective lens, the more light from the distant objects is attracted and the distant image can be viewed perfectly.

However, powerful the binocular is, you must be aware of the way to handle them. Holding the binoculars by the hand will be truly effective as shaking might make the magnification less useful. So if you are planning to use the binoculars for active activities, then get for yourself a pair of binoculars that has 4-7 times magnification. If your work demands using the binoculars in low light situation or indoors, then you should get larger objective lens with 30 power or above.

The weight of the binoculars should be considered before you purchase them. When you are using the binoculars for trekking, boating, fishing, or for astronomical purposes, you should see that the weight should not be very heavy. When you are going for these traveling purposes, you should plastic lens in binoculars that will help produce high quality and sharp image. Glass lenses can be available at lower cost but they are very fragile. So you should use plastic lens binoculars for better results.

Get a pair of binoculars to enjoy distant objects clearer and nearer to your eyes.

Article Source : http://www.articledashboard.com

Sharon Albright is the owner of Binoculars Site. Read more articles on Binoculars and visit her recommended resources.

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Monday, June 16, 2008

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Review of Meade ETX-60 AT Digital Telescope With Autostar
Author: Anne Noonan
The Meade etx 60 at digital telescope with autostar is the perfect educational beginner telescope. It includes an eyepiece that is 9mm, an instruction manual and Autostar, which controls the telescopes computer. You can find the Meade etx-60 at digital telescope with autostar for under $200 if new.

For precision control the Meade etx-60 has electric controls that are fork mounted, setting circles, and dual locking mechanisms. The two axis motor drive has tracking with a sidereal rating.

The optics are a achromatic refractor design, with a diameter of 60mm and a focal length of 350mm. The eyepiece has a magnification of 39x, and has multiple coats. At approximately 15 feet is where the focus is adjusted best.

Other features of the Meade etx-60 at digital telescope with autostar are it is protected with many layers of optical coating, has an achromatic assembly for the refracting optical tube, and an internal system of flip mirrors so that you can observe from a 90 degree observation point or straight on.

Article Source : http://www.articledashboard.com

Anne Noonan makes it quick and easy to choose the best telescope for you. Learn more by reading our expert telescope reviews website. Plus check out the Meade-etx125pe-astro-telescope-premiere-edition

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Sunday, June 15, 2008

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Clever Pluto Will Survive, It Seems, As A Planet
Author: Tom Attea/NewsLaugh.com
This week we nominate for clever monkey, not a person who has distinguished himself or herself for something well or ill accomplished, but Pluto, which, until recently, bestrode the heavens, securely placed in our imaginations as the most distant and smallest planet.

Then other bodies in the distant solar system were discovered, with our ever more deeply prying telescopes, that are even larger than the diminutive, ringed body.

So for a time it seemed that Pluto might, after all these decades of secure distinction, since its discovery in 1930, be demoted to asteroid status.

Soon The International Astronomical Union will meet and decide on its fate. Rumor is that its members will likely preserve Pluto's status by the clever tactic of redefining just what it takes to qualify as a planet.

In fact, as part of its survival, we could find ourselves with as many as three new members of sun-circling globes, named Xena, Charon, and Ceres.

What could be, astronomically speaking, more clever than that?

Article Source : http://www.articledashboard.com

Tom Attea, humorist and creator of NewsLaugh.com, has had six shows produced Off-Broadway. Critics have called his writing "delightfully funny," "witty," with "great humor and ebullience" and "good, genuine laughs."

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Saturday, June 14, 2008

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Was Galileo the first person to use a telescope
Author: Anne Noonan
Many historians explain that Galileo was the first person to use a telescope. In 1610 Galileo discovered Saturn's rings. He also observed Jupiter's four moons and viewed the different phases of Venus. This lead to the study of sunspots and various celestial activities.

Even though Galileo is credited with being the first to make practical improvements and enhancements to the use of the telescope, he was not the inventor, and therefore not the first person to use a telescope. That person would be Hans Lippershey.

Hans Lippershey was born 1570 in Germany, but was raised in Holland. He invented the first refracting telescope in 1608. A lens maker, he designed this telescope from two lenses and applied for a patent, intending that it would be important for the military. He successfully demonstrated the usefulness of his refracting telescope to the military.

Article Source : http://www.articledashboard.com

Learn more about Galileo refractor telescopes here.

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Was Galileo the first person to use a telescope
Author: Anne Noonan
Many historians explain that Galileo was the first person to use a telescope. In 1610 Galileo discovered Saturn's rings. He also observed Jupiter's four moons and viewed the different phases of Venus. This lead to the study of sunspots and various celestial activities.

Even though Galileo is credited with being the first to make practical improvements and enhancements to the use of the telescope, he was not the inventor, and therefore not the first person to use a telescope. That person would be Hans Lippershey.

Hans Lippershey was born 1570 in Germany, but was raised in Holland. He invented the first refracting telescope in 1608. A lens maker, he designed this telescope from two lenses and applied for a patent, intending that it would be important for the military. He successfully demonstrated the usefulness of his refracting telescope to the military.

Article Source : http://www.articledashboard.com

Learn more about Galileo refractor telescopes here.

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Friday, June 13, 2008

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Meade Telescopes – Where Quality Counts
Author: George Royal -
When aspiring astronomers look for quality optics that will let them peer into the unknown reaches of void, Meade telescopes are an excellent choice. With a wide variety of telescopes, mounts, and filters available, Meade provides options for the backyard stargazer and the serious student alike. Which is why Meade telescopes are trusted the world over.

Meade grew from very humble beginnings, with nothing but one man, a kitchen table and a 2"x4" ad in Sky & Telescope magazine in 1972. At first offering nothing but a small refracting telescope, Meade discovered that the demand for quality optics and accessories was not being met by the companies who made telescopes. So, with a new ad in the fledgling Astronomy magazine, Meade expanded their offerings and improved their designs, allowing them to stand out from the other telescopes on offer. In fact, by paying attention to details such as spring-loaded gearboxes on the focusers and including eyepieces with wide fields of view, Meade turned itself into a name to be reckoned with.

Meade telescopes continued to become more and more popular every year, thanks to their expanding offerings and commitment to quality. In fact, by 1977, they had become so popular that they had a 6-month backlog of orders for their new line of reflecting telescopes. But, after first offering each of their customers a refund if they desired one, they grew the business to meet the demand and delivered the orders in only three months.

Finally, as Meade continued to gather more and more market share, they opened the 1980's with their line of Schmidt-Cassegrain telescopes. Because Meade saw that the Schmidt-Cassgrain design could do more than other telescope designs, the engineers and designers stood up to the challenge and delivered a top-notch telescope that took this telescope design to new levels of quality.

Today, there are Meade telescopes for every interest and every budget. Whether it is an inexpensive starter telescope for someone who is just starting their nighttime explorations, a large scope for a dedicated, backyard researcher, a scope for the person who wants to travel light, or even a specialist who wants a telescope to examine sunspots, Meade has the gear that will open up a window to the stars and planets.

Through the years, Meade has expanded its business and extended their product line into new areas. In addition to Meade telescopes, there are Meade mounts, eyepieces, imagers, photographic lenses, and even binoculars and microscopes. And, as their business moves into fresh areas, Meade puts the same stamp of quality on their new products as they have put on their stargazing equipment.

From a small operation run from one man's kitchen table, Meade telescopes have set new standards of quality by paying attention to details that matter. And by taking care of the details and taking care of their customers, Meade is the name people look for when they are looking for when they look for a telescope. Which means that Meade telescopes are what people look through when they look toward the heavens.

Article Source : http://www.articledashboard.com

Telescopes HQ . Your guide to telescopes from buying telescopes, how telescopes work and who invented telescopes.

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Thursday, June 12, 2008

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Choosing The Right Telescope
Author: Duane Brown
Ever since Galileo, people have been pointing telescopes to the heavens and expanding their view of this world by looking outside of it into other worlds. It can be a fascinating and rewarding endevour. You can even meet some very good friends this way as there are usually local star-gazing clubs within reach of almost anywhere in the country that offer plenty of companionship when using your telescope.

But how do you choose from the wide array of telescopes that are being sold today? Well, first of all you need to understand just a couple of basic points about telescopes. One is that magnification is not really the most important characteristic of a telescope. That may seem very strange, but the truth is that the most significant capability of a telescope is it's ability to gather light. After all, what good is a large image that you can barely see?

The light gathering capability of a telescope is usually in direct relation to the size of it's aperture or it's light gathering lens or mirror. Now, you are probably thinking that you just need to get a telescope with the largest aperture possible then, but that is not the case. Somewhere along the line there will be a tradeoff between the size of the aperture and portability. So if you want to transport your telescope at all, you will want to make sure that it is not too heavy and bulky to be mobile. Remember that you will also most likely have to set up and adjust your telescope in the dark if your transport it, so having one that is very large can be a daunting task when you can't see what you are doing very well.

On the magnification factor, you can adjust the magnification of almost any telescope through the use of different eyepieces, so that is not a really important consideration when buying.

It's also important to know that there are three different kinds of telescopes, the reflector, refractor and catadioptric.

The refractor is the kind of telescope that most people think of when they think of telescopes. It essentially has a large lens on the end of a barrel that focuses an image on an eyepiece at the back of the barrel. It's actually a very simple design, but it can also be more costly and bulky than the other styles of telescopes available. It's good for viewing the night sky and long range here on earth, but again, it gets very expensive to produce when you want to see deep space objects.

The next kind of telescope is the reflector, and it uses mirrors to gather the light and focus it on a small eyepiece that is usually located on the side of the barrel. Mirrors are much less expensive to produce than the lenses used in refractors, so the reflector telescope is usually much less expensive as well. It is not suitable for terrestrial viewing here on earth though and it does lose a little light due to the use opf mirrors in it's design.

The final style of telescope is the catadiaoptric which is really a blend of both refractors and reflectors, essentially taking the best of both designs with few of the drawbacks. It is a good all around selection for telescope usage as it is a good choice for both terrestrial and astronomical viewing. They may not be what you expect a telescope to look like but their design is very modern and durable.

Choosing any of these types and styles of telescopes will work depending on what you plan to use your telescope to do, and your budget. The important choice is to embark on a discovery of parts of the universe that you have never seen before.

About the Author

Duane Brown - http://www.all-about-binoculars.com All About Binoculars provides free information, tips, and resources on binoculars, telescopes, rifle scopes, and spotting scopes, and how to find them at the very best price.

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Wednesday, June 11, 2008

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Great Astronomical Observatories of the World
Author: David Craig
The great observatories of the world are responsible for many of the prolific astronomical observations of the twentieth century. Telescopic photograpy, radio dish data collection, and infrared imaging are among the many different techniques observatories have been able to employ to learn about the heavens.

The Palomar Observatory may be the most famous of all. With five telescopes operated by Cal-Tech's graduate and post-doctoral students, the 200-inch Hale telescope is the most famous of all Palomar's telescopes. Built in 1949, it was intended to overcome the onset of the southern California smog problem. Other noteworthy telescopes operated at Cal-Tech include a telescope to search for supernovae, a comet hunter, a trio of sky cameras looking for planetary and other celestial phenomena, an interferometer capable of detecting the slightest wobble in the orbits of a planet, and a sixty inch telescope responsible for spotting the first brown dwarf circling a companion star.

Cal Tech is also directly involved in the operation of the Keck and Lick Observatories. The Keck Observatory, located on top of Hawaii's dormant Mauna Kea volcano contains the world's largest optical and infrared telescopes. Its twin Keck telescopes stand eight stories high and weigh 300 tons each. Lick Observatory is located on 4200 foot Mount Hamilton east of San Jose, California. It contains nine research telescopes with the largest being the Shane 3-meter Reflector. This telescope is used to observe everything from our local solar system to faraway galaxies.

The Griffith Observatory in Los Angeles is known for its12-inch Zeiss Refracting telescope. This telescope's fame is largely due to the fact that it has been used to allow public viewing of the universe since 1935. More than five million people have looked through its lenses since under the guidance of experienced Telescope Demonstrators. The Griffith Observatory was also known for its laserium light shows in previous years although they have been discontinued at present.

The Hayden Planetarium in Boston is more than just a planetarium. It is also a museum. Along with its Gilliland Observatory, laser-light shows and a rotating star simulator are among some of the different multi-media astronomical experiences available to the public.

The Greenwich Observatory in Cambridge, England was established in 1675 by King Charles II in order partially to fix longitude readings. It currently fixes the origin of the worldwide time reference point of Greenwich Mean Time. An observatory in Portland Maine is being restored as a famous architectural monument. Another observatory of note is the University of Chicago's Yerkes Observatory with its five telescopes.

All of these observatories have added to the vast array of knowledge now known about the universe. Their importance to the history of astronomy, as well as their continuing usefulness, can not be overemphasized.

1) Palomar observed: For more than 50 years, science above and beyond; Scott LaFee; San Diego Union Tribune; November 2, 2005
2) CalTech Astronomy Website;
3) UC Observatories Website
4) Yerkes Observatory Website;
5) Griffith Observatory Website;
6) Observatory view worth preserving; by John Alphonse.
7) Hayden Planetarium Website.
8) The Astronomical Society of Edinburgh: A Guide to Edinburgh's Popular Observatory

Article Source : http://www.articledashboard.com

David Craig M.S. Physics - University of Minnesota B.S. Computer Science - University of Oregon Click here for more fascinating astronomy articles as well as the most up to date selection of Nasa products from the Space Store, Nasa's only approved merchandiser.

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Tuesday, June 10, 2008

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Meade Telestar Review DS 60ME
Author: Anne Noonan
This Meade Telestar review features the DS 60ME model. The DS 60ME is equipped with three styles of eyepieces, the H25mm, H12.5mm, and the SR4mm. All these pieces are electronic and will let you view images on your TV. Being able to see celestial images on your television is a lot of fun especially if it is a large screen. Continue reading our Meade Telestar review for further details.

Research for our Meade Telestar review revealed the DS 60ME optical capabilities are very advanced allowing you to see sharp, high contrast objects in the night sky or land. Stars, planets, and the moon can be seen clearly, along with birds and other nature.

The Telestar DS 60ME uses a hi-tech Digital Series mount, both axes have slow motion controls. This enables you to track objects accurately and smoothly. Its equipped with a refractor lens that is 60mm, and its 700mm focal length provides sharp images and incredible contrast. This Meade Telestar review of the DS 60ME telescope gives it a 5 star rating.

Article Source : http://www.articledashboard.com

Anne Noonan makes it quick and easy to choose the best telescope for you. Learn more by reading our expert telescope reviews website. Plus check out the Meade 506 review

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Monday, June 9, 2008

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Servicing Missions to the Hubble Space Telescope
Author: Jeremy Hier

The Hubble Space Telescope received its first Service Mission in December 1993. The missions most important objective was to install two devices to fix the Hubble Telescope's vision problem . The space telescope could not focus all the light from an object to a single sharp point because Hubble's primary mirror was incorrectly shaped. Instead it saw a fuzzy halo around objects it observed in space.

Interesting facts about Hubble Space Telescope is there is no question that the Hubble Telescope gave us amazing pictures and views of very early distant galaxies. But because the universe is expanding, the light from the most distant space galaxies is shifted to infrared wavelengths. So to see the galaxies the Hubble neede to be fitted with an instrument that could observe infrared light.

In Feb. 1997 the Hubble Telescope received its Second Servicing Mission. The space shuttle Discovery was boarded by seven astronauts. They installed two technologically advanced instruments, onto the Hubble. To observe space objects in infrared wavelengths the Near Infrared Camera and Multi-Object Spectrometer was installed. The second instrument installed was the Space Telescope Imaging Spectrograph, which is used to take detailed pictures of celestial objects and hunt for black holes.

Service Mission 3A in December 1999 was a busy one for the space telescope. Their goal was the replacement of gyroscopes, which accurately point the Hubble at celestial targets. The crew replaced all six gyroscopes as well as one of Hubble's three fine guidance sensors, which allow fine pointing and keep Hubble stable during space observations.

Service Mission B for the Hubble Telescope occurred on March 1st 2002 when NASA launched the space shuttle Columbia, where its seven member crew met with Hubble to perform a series of upgrades. The astronauts performed five spacewalks. Their mission was to install the Advanced Camera for Surveys. The ACS doubled Hubble's field of view and collects data ten times faster than before.

Copyright © JJ PERSISTENT PUBLISHING, INC.

PERMISSIONS TO REPUBLISH: This article may be republished in its entirety free of charge, electronically or in print, provided it appears with the included copyright and author's resource box with live website links.

Jeremy Hier is the Business Manager and Webmaster of http://www.best-telescope-guide.com/ " target=_blank>Best Telescope Guides Jeremy Hier is a freelance writer and regular contributer He likes to offer his advice and tips to consumers looking to purchase http://www.best-telescope-guide.com/meade-telescopes.html " target=_blank>meade telescopes and http://www.best-telescope-guide.com/celestron-telescopes.html " target=_blank>celestron telescopes

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Sunday, June 8, 2008

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Exploring the Universe with Dr. Norio Kaifu
Author: Gayle Olson
During 1998 we were fortunate to attend a dinner hosted by the Japanese Chamber of Commerce and Industry of Hawaii, featuring a lecture by Dr. Norio Kaifu. Professor Kaifu is the director of the Subaru Telescope, National Astronomical Observatory of Japan (NAOJ) and has held the position as vice president of the International Astronomical Union (IAU) since 1997. A specialist in radio astronomy, infrared astronomy and interstellar matter, Dr. Kaifu has published some 100 papers on astronomy in addition to 15 popular science books. Before joining the Subaru in 1990, he was a director, a professor and an associate professor at the Nobeyama Radio Observatory, and a senior research associate in the Faculty of Science at the University of Tokyo. As an amateur backyard astronomer we were delighted to learn of the possibilities this new telescope will bring to the exploration of universal knowledge.

Dr. Kaifu shared his views about the design of the new telescope, cylindrical in shape, rather than dome, it can be more optimal for wind resistance. The 8-meter diameter glass mirror is only 8 inches thick and has taken six years to construct and polish. The mirror is controlled by two Fujitsu parallel computers, with the largest memory capacity in the world with 261 supporting structures. 100 times per second the computer adjusts the mirror to counteract the atmospheric turbulence, which we see as twinkling stars. The mirror can be controlled by the computer by each second, to obtain the best view of the deeper universe. Mauna Kea was chosen as a location for the new Japanese telescope because of the stable weather and easy access.

What will the new telescope discover? Astronomer's will be using the telescope to study the history of our galaxy and answer questions as to how life was created in the universe. New planets may be discovered, possibly including planets which support life. They will be looking as far as possible into deep space and looking back in time. Light from the most distant objects have been travelling for billions of years, they may even be able to catch sight of the end of the universe. The Subaru will be beneficial to the science of astronomy as all data will be shared with astronomers worldwide. The economic spinoffs and technology have greatly enhanced the Island of Hawaii.

Related Internet Resources

http://aloha.150m.com/noriokaifu.htm

About the Author

Internet content developer and author since 1995.

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Saturday, June 7, 2008

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The History and Achievements of the Hubble Telescope
Author: Jeremy Hier

The Hubble Telescope is famous worldwide for its amazing images of the universe. Congress in 1977 voted to fund a project to construct the Hubble. Completion of the telescope was in 1985. The Hubble was supposed to be launched a year later but was delayed because of the 1986 Space Shuttle Challenger disaster.

The Hubble Space Telescope was launched on April 25th, 1990 on the space shuttle. The giant telescope Hubble sent back pictures from space that were out of focus. The giant mirror had a major flaw. It was too flat on one edge 1/50th of the width of a single human hair.

The Space Shuttle Endeavor in December 1993 captured and corrected the Hubble by adding to the telescope a camera to correct problems with the Hubbles mirror. In February 1997 astronauts exchanged some of its instruments and added new blankets to keep Hubble warm. NASA decided on Oct. 1997 to extend its operations from 2005 to 2010.

Hubble's mission in space is to explore the solar system, and measure the age and size of the universe. Hubble's giant telescope searches for our cosmic roots, and charts the evolution of the universe. It also trys to unlock the mysteries of stars, planets, galaxies, and life itself.

Achievements of the Hubble

NASA releases Orion Nebula images from the Hubble in June 1994 that confirms the births of planets around newborn stars in space.

In Nov. 1995 telescope images released by NASA of the "Eagle Nebula" showing where stars are born.

NASA releases the "Deep Field" images in Jan. 1996 in which Hubble looks back in time more than 10 billion years. Revealing at least 1,500 galaxies at various stages of development.

New images of "Ant Nebula" in Feb. 2001.

Copyright © JJ PERSISTENT PUBLISHING, INC.

PERMISSIONS TO REPUBLISH: This article may be republished in its entirety free of charge, electronically or in print, provided it appears with the included copyright and author's resource box with live website links.

Jeremy Hier is the Business Manager and Webmaster of http://www.best-telescope-guide.com/ " target=_blank>Best Telescope Guides Jeremy Hier is a freelance writer and regular contributer He likes to offer his advice and tips to consumers looking to purchase http://www.best-telescope-guide.com/meade-telescopes.html " target=_blank>meade telescopes and http://www.best-telescope-guide.com/celestron-telescopes.html " target=_blank>celestron telescopes

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Friday, June 6, 2008

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Hubble Telescope
Author: George Royal -
One of the most important telescopes in the history of astronomy, the Hubble telescope has allowed observers to peer farther into space than any previous telescope. By moving outside and above the atmosphere of the earth, the Hubble telescope has been able to observe visual data much more clearly than a terrestrial telescope, and it has been able to see much farther into the ultraviolet and infrared spectrums as well, since these spectra are largely absorbed by the earth's atmosphere. Thus, by moving the observing platform into open space, the Hubble telescope has given a much clearer view of the universe, allowing scientists to peer even deeper into space.

The Hubble telescope is named for Edwin Hubble, the astronomer who originally determined that the universe is expanding. This discovery, one of the foundations of modern astronomy and cosmology, made Hubble an excellent choice for the honor of having this telescope named for him.

The concept for the Hubble telescope was originally the idea of Lyman Spitzer back in 1946. He clearly saw that earth-based telescopes were inherently limited in their ability to see into the heavens, since dust, clouds, and even turbulence in the atmosphere interfered with telescopes' clarity. Which meant that the best way to get a clear image from a telescope was with a telescope that was in orbit around the earth.

After some success with the smaller Orbiting Astronomical Observatory, the plan for a large scale telescope was born. There were some fits and starts however, mostly due to budget constraints, and the project did not really take off until the 1970's and funding was not approved until 1978. Then, with funding in place, plans were made to launch the Hubble telescope in 1983. However, due to various delays, it was not actually launched until 1990.

After a few early problems, the Hubble telescope finally started sending back clear images. And those images were well worth the effort. The Hubble telescope was able to achieve a sharpness and resolution that was unimaginable with a standard, earth-bound telescope; crisp images that not only showed new detail in known areas of space, but also peered deeper into space than ever before. And with these new images, astronomers have been able to discover new and exciting information about our universe.

However, it is not only astronomers who have been amazed at the images that the Hubble telescope has produced. In fact, the images from Hubble are delights to view all on their own. From the clearly defined galaxies, to pictures of nebulae, to the Apollo 15 landing site, Hubble has been as exciting for the public as it has been for scientists.

As the Hubble telescope ages, its future is uncertain. Corrective software has allowed earth-based telescopes to pick up much of the information previously possible only with a space-based telescope. And as NASA retools itself to follow its mandate to take a man to Mars, money that would be spent on maintenance of the Hubble is being spent elsewhere. However, before the Hubble telescope enters the atmosphere sometime in 2010, it will provide a remarkable window into the universe and all that is in it.

Article Source : http://www.articledashboard.com

Telescopes HQ. Your guide to telescopes from buying telescopes, how telescopes work and who invented telescopes.

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Wednesday, June 4, 2008

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Takahashi Telescopes Reviewed
Author: Jeremy Hier

Takahashi telescopes SKY90 model is designed for portability. You'll have no problem carrying this telescope anywhere, the optical tube assembly is only 13.8" long, and weighs only 7 pounds. The Takahashi SKY90 telescopeis equipped with a fluorite doublet apochromatic optical system for brilliant images. Takahashi is continually upgrading its telescopic technology.

The TOA-130 is Takahashi Telescope's 21st century innovation. It employs a newly designed triplet using Takahashi special elements to produce the highest order of color correction. The TOA-130 is the perfect telescope for visual, CCD and photo imaging. You'll be able to see clear images of the moon and planets because this telescope is equipped with the LE-ED 2.8mm Takahashi ocular for high magnifications.

For astronomers who will do research and educational projects, take a look at the Takahashi C400/EM3500 telescope. This Classical Cassegrain is part of Takahashi's Observatory Series. This telescope will give you extremely high resolution without sacrificing contrast or a flat field because of its Classical Cassegrainian configuration, with a parabolic primary mirror and hyperbolic secondary.

The Takahashi FCT-200 Fluorite Apochromatic refractor telescope is one of the largest manufactured by Takahashi. It is designed for professional telescopic observatory use at universities, planetariums, summer homes etc. Takahashi has employed in this telescope the highest quality German optical glass and Japanese Fluorite for the center element. For maximum light transmissions all elements are multi-coated.

Takahashi continually strives to provide the most up to date advanced telescope equipment.

Copyright © JJ PERSISTENT PUBLISHING, INC.

PERMISSIONS TO REPUBLISH: This article may be republished in its entirety free of charge, electronically or in print, provided it appears with the included copyright and author's resource box with live website links.

Jeremy Hier is the Business Manager and Webmaster of http://www.best-telescope-guide.com/ " target=_blank>Best Telescope Guides Jeremy Hier is a freelance writer and regular contributer He likes to offer his advice and tips to consumers looking to purchase http://www.best-telescope-guide.com/meade-telescopes.html " target=_blank>meade telescopes and http://www.best-telescope-guide.com/celestron-telescopes.html " target=_blank>celestron telescopes

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Tuesday, June 3, 2008

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Reflecting Telescopes
Author: George Royal -
When people think of telescopes, reflecting telescopes are usually the last things that come to mind. Rather, people tend to think of a straight tube with lenses at either side. This is unfortunate, since there are several ways to bend light so that it is magnified to the point where a person on the ground can make out the features on Jupiter, the billowing gasses of a distant nebula, or the light of distant stars. In fact, if a stargazer wants to peer into the inky voids of space with a scope of manageable size, a reflecting telescope will serve them well.

Reflecting telescopes use mirrors to magnify images, allowing the image to be enlarged a few times before coming through the eyepiece. This is simpler to implement than a standard, straight-through refracting telescope, as it allows several smaller adjustments to the image than a few, very large changes with lenses. And, by doing this with mirrors, the design of the telescope can be made much more compact, allowing more magnifications of an image in a smaller telescope.

In order to understand reflecting telescopes, you must begin by understanding the fact that there are two methods of focusing light so that objects seem closer. The first method is through lenses, which use refracting to bend light and focus it. The second method is with mirrors, which can be shaped to reflect light in such as way that small, distant objects appear to be very close and easily visible.

There are two general designs for reflecting telescopes: the Newtonian and the Cassegrain and its variants. The first type, Newtonian, is a very simple design and it is very popular with amateurs who want to home-build a telescope. In the Newtonian design, there is one large mirror at the base of a long tube, and the mirror is focused onto a flat mirror that redirects the image toward an eyepiece. This design was originally created by Isaac Newton, and it was the first successful design for a reflecting telescope.

The second type of reflecting telescope, the Cassegrain and its variants, uses two mirrors to create the image. One large mirror is set up at the base of a tube, with a smaller mirror facing it at the top of the tube. The light comes in through the top, is focused by the larger mirror, and reflected back by the smaller mirror and sent through a hole in the larger mirror and on to the eyepiece. This makes the Cassegrain telescope look like a refracting telescope, though they function very differently. However, their ultimate aim is the same: to allow people to see things that are very far away.

When looking for a telescope, reflecting telescopes are some of the best that can be found. They are effective, easy to use and, in some cases, easy to build – making them the preferred choice for professional astronomers and backyard hobbyists. So, when thinking about telescopes, don't just think picture the lenses that usually come to mind, think about remarkable properties of mirrors and reflecting telescopes.

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Monday, June 2, 2008

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Meade Telescopes Stand for High Quality at a Reasonable Price
Author: Jeremy Hier

The Meade Telescopes Company is a world leader in the design and manufacture of telescopes and accessories for amateur astronomers. The Meade Company was founded in 1972 and went public in 1997. Meade Instruments began with only $2,500, they used this capital as a mail-order supplier of small refracting telescopes.

By 1977 the Meade Telescope Company was offering a wide range of telescope parts and accessories. Meade's range of accessories allowed them to manufacture their own telescopes. Meade's first models were the 628 and 826 6" and 8" reflecting telescopes. American amateur astronomers found that they had, really for the first time, a telescope manufacturer that provided a quality product at a reasonable price.

The 6" and 8" Meade reflecting telescopes were an incredible success so much that the Meade Company faced a 6-month backlog. Normally there is a 6 to 8 week delivery time, but the Meade Company still wrote every customer explaining the backlog situation of their telescopes, and offered a full and immediate refund if the extra waiting time was unacceptable.

Few accepted the offer, and they were able to ship all of the back-ordered telescopes.

In September 1980, Meade announced its new telescope, Model 2080. Since that time Meade has come out with exciting new telescopes and accessories. By 1986 Meade Instruments was generally acknowledged as the largest, and the leader in manufacturing serious telescopes.

Copyright © JJ PERSISTENT PUBLISHING, INC.

PERMISSIONS TO REPUBLISH: This article may be republished in its entirety free of charge, electronically or in print, provided it appears with the included copyright and author's resource box with live website links.

Jeremy Hier is the Business Manager and Webmaster of http://www.best-telescope-guide.com/ " target=_blank>Best Telescope Guides Jeremy Hier is a freelance writer and regular contributer He likes to offer his advice and tips to consumers looking to purchase http://www.best-telescope-guide.com/meade-telescopes.html " target=_blank>meade telescopes and http://www.best-telescope-guide.com/celestron-telescopes.html " target=_blank>celestron telescopes

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