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An astronomy telescope is a scope that allows individuals to see the planets and stars in greater clarity than they can see them with the naked eye. It is not only fun to do, but it can be an activity that both adults and children can share in interest and enjoyment. But, how do you know which telescope to buy? There are so many different kinds, sizes, magnifications, and prices that it can be very intimidating to purchase your first astronomy telescope without some information and education first. Here are some basic guidelines that you can follow when making your choice:
Reflective, Refractive, or Compound? These terms refer to the types of lenses and the way that the images are collected. A reflective scope uses mirrors to collect light and focus the images while a refractive uses curved glass lenses, and the compound astronomy telescope uses a combination of the two.
The cost of a reflective telescope makes it an attractive choice. Mirrors are inexpensive and easy to replace. It is also good for deep space viewing. The disadvantage is that it the mirrors sometimes do not provide the clarity of the refractive scope and sometimes the mirrors are jostled loose.
The refractive astronomy telescope is good for viewing planets and stars. It has very clear images and is easy to maintain. The cost is the main prohibitive factor to most beginning astronomers.
The compound telescope is also on the pricier end of the astronomy telescope family. It is used most often by serious astronomers and those who make a career of astronomy because of the clarity of images and the ability to see images in deep space. This is probably not the best choice for novice star-watchers.
One of the main considerations that you should think about when you are purchasing an astronomy telescope is the aperture. This is a measurement of the ability of the telescope to let light in and also the ability to focus that light. This is a more important measure of the telescope?s abilities than the magnification. The bigger the aperture, the better the telescope will be.
Another important consideration is mounting and portability. If you are going to be moving your astronomy telescope from place to place or taking hiking or camping, you will want a smaller scope with an easy to manage mount. The alt-azimuth mount allows the astronomy telescope to move up and down vertically and side to side horizontally from a central axis-this is perfect for beginners. A more advanced astronomy telescope user might like an equatorial mount which not only allows vertical and horizontal movement, but also sliding from side to side on a perpendicular mount to follow the movement of stars and planets.
As you research your choices you will find a lot more information which can be helpful in deciding the best telescope for you and your family.
... HI emission per unit mass of gas, and is a few hundred times more sensitivity than the 300 m Arecibo telescope to HI emission. This increased sensitivity will enable the MMA to extend T--F to much ...
http://www.mma.nrao.edu/science/cosmology/cos.html
... C. Byrd Green Bank Telescope in West Virginia, which worked with the NSF's recently-upgraded Arecibo telescope in Puerto Rico. The project used the radar transmitter on the Arecibo telescope and the ...
http://www.nrao.edu/pr/2001/gbtfirstsci/
Learn about the Moon with this eBook and predict Moon phases and more with the associated astronomy/astrology software package.
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... deny ET signal report By Dr David Whitehouse BBC News Online science editor The giant Arecibo telescope is used to scan the skies Astronomers have moved swiftly to quell speculation they may have ...
http://news.bbc.co.uk/1/hi/sci/tech/3621608.stm
Wacklepedia Home Page | | Alphabetical index Arecibo radio telescope - Free Encyclopedia The Arecibo radio telescope is located in Puerto Rico about 10 km south of the town of Arecibo, which is ...
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... SETI@Home collects data from the radio telescope at the Arecibo Observatory in Puerto Rico. It then sends portions to thousands of volunteers who have software that uses their computers' idle time to ...
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... If an ideal signal is sent from a distant planet, it will be seen on Earth as having a bell shape as Arecibo telescope's focus moves across the sky. As the telescope approaches the source star, the ...
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... 0.01 Light-Years of the Sun even with a radio telescope with 100 times the sensitivity of the 305 meter diameter Arecibo telescope. The SETI league, a group of technically savvy SETI enthusiasts and ...
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... Both the Arecibo telescope and the NSF's new 100-meter Robert C. Byrd Green Bank Telescope were used to receive the extremely weak radar echoes. Next summer, NASA's Cassini spacecraft, launched in ...
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... time. Arecibo Puerto Rico Is the best telescope that we own And someday It will show us, we're not alone! email the Webmaster | Home | General | Memb Svcs | Publications | Press | Technical | Internet ...
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... Steven Ostro of NASA's Jet Propulsion Laboratory, Pasadena, CA, who led a team of astronomers observing Kleopatra with the 1,000-foot (305- meter) telescope of the Arecibo Observatory in Puerto Rico ...
http://nssdc.gsfc.nasa.go ...atra_pr_20000504.html
... life. May 23, 1999: The Arecibo Observatory, the world's largest radio telescope, completely fills a ... ... ft. (305 m) diameter Arecibo radio telescope is the largest single-dish telescope in the world. The ...
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... Because it remains stationary, the Arecibo telescope uses EarthÄôs rotation to turn its field of view across the sky. Radio waves bounce off the bowl of the telescope and into the detecting platform ...
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... Field of view varies by frequency, but the ATA gives astronomers a 2,500-fold increase in simultaneously observable area over the 1960s-era Arecibo telescope, and seventeenfold over the 1970s vintage ...
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Generator-Air Compressor, Routers, Vacuum cleaner, Welding General information The Arecibo telescope is distinguished by its enormous size; the main collecting dish is 305 m in diameter ...
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... Earth. Seti@home uses the largest telescope in the world, the Arecibo telescope in Puerto Rico, to continuously scan the sky for radio signals. So far, nearly all of the sky visible from the Arecibo ...
http://www.draculus.co.uk/setiuk/setiathome.php
HOME : GALLERY : IMAGE OF THE WEEK : 2002 October 10, 2002 Arecibo, Puerto Rico This resampled one-meter resolution color image of the Arecibo Radio Telescope was taken by Space Imaging's IKONOS ...
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Hubble Space Telescope-Seeing Beyond the Milky Way
Eriani Doyel
The Hubble Space Telescope has allowed scientists and the rest of the world a look into outer space that was not even imagined one hundred years ago. In fact, it is only in the last one hundred years that it was discovered that there are millions of galaxies beyond ours and that the universe is constantly expanding. Since its launch in 1990 this telescope has been an invaluable source of information to astronomers and scientists throughout the world. As the Hubble Space Telescope orbits its way around the earth once every 95 minutes, it continues to gather more knowledge about not only our galaxy but the ones beyond as well. A timeline of Hubble Space Telescope History: 1924--Edwin Hubble looked up into the night sky to disprove the theory of a single galaxy. He proved that rather than just gasses and dust, the universe was filled with other galaxies. He was the first to prove that our universe was continuing to grow and expand. However, he did not have the benefit of the tools we have available today, so his knowledge was still somewhat limited although his vision was far-reaching. 1924-1983--the concept of a Large Space Telescope (LST) was conceived, designed, revised and developed and implemented. In 1985, the LST was renamed the Hubble Space Telescope, to honor the man who started it all. 1990--After delays with its launch due to conflicts with the launch of the space shuttle, the Hubble Space Telescope was sent into orbit. 1994--the telescope took pictures of a comet collision, and detailed photos of Pluto, as well as giving us a greater knowledge of Neptune and Uranus. 1995--the Hubble took pictures of the “birth” of a star as it developed from interstellar clouds. 1996--Photos from the Hubble Space Telescope show that quasars are actually nuclei which illuminate when a black hole uses energies from surrounding gases and stars. 1997--The Hubble takes pictures which prove that black holes are bigger than the sun. 1998--The most detailed pictures of the planets in our solar system are taken. 2004--The Hubble Space Telescope was able to document in pictures how, when, and why stars die and using the Hubble Ultra Deep Field technology, to take pictures of the expanding universe unlike any that had previously been taken. It also took pictures of Mars when it was closer to Earth than it had been in 60,000 years. 2005—Took pictures of a comet with a projected piece of equipment from the Hubble Space Telescope. Future Developments—The Hubble Space Telescope's mission is scheduled to end with this decade. Astronauts will go up, make repairs and assess the future usefulness of this tool in deep space discovery and a decision will be made about whether it should be discontinued or remain in service. But, no matter what decision is made, this telescope has been an amazing resource for a broader understanding of space and its limitless possibilities. Thank you, Mr. Hubble.
http://www.ezinearticles.com/?Hubble-Space-Telescope-Seeing-Beyond-the-Milky-Way&id=123038
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