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Latest Optical telescope Stories

Image 1 - Webb Telescope Receives COCOA This Winter
2011-12-16 09:14:50

Engineers working on NASA's James Webb Space Telescope are bringing out the COCOA this winter, but it's not a warm beverage. Rather, it's a way to check that the mirrors are perfectly shaped and will work in the frosty environment of space. COCOA stands for "Center of Curvature Optical Assembly." Curvature is important in a mirror, just as the convex side mirrors on your car are shaped to give you a wide field of vision behind and beside your car. COCOA tests on the Webb telescope's...

Image 1 - Vampire Star Reveals Its Secrets
2011-12-07 05:55:54

[ Video 1 ] | [ Video 2 ] Astronomers have obtained the best images ever of a star that has lost most of its material to a vampire companion. By combining the light captured by four telescopes at ESO´s Paranal Observatory they created a virtual telescope 130 meters across with vision 50 times sharper than the NASA/ESA Hubble Space Telescope. Surprisingly, the new results show that the transfer of mass from one star to the other in this double system is gentler than expected....

Image 1 - Assembly Stand Completed for NASA's Webb Telescope Flight Optics
2011-11-17 14:23:26

[ Watch the Video ] The clean room at NASA's Goddard Space Flight Center in Greenbelt, Md., has received a giant structural steel frame that will be used to assemble the mirrors and instruments of the James Webb Space Telescope. "This milestone is important as it marks the transition to the integration and testing phase for the Webb telescope's optical telescope element," said Lee Feinberg, Optical Telescope Element Manager for the Webb telescope at Goddard. The Webb telescope is the...

Webb Telescope Completes Mirror-Coating Milestone
2011-09-14 06:42:01

  [ View the Video ] NASA´s James Webb Space Telescope has reached a major milestone in its development. The mirrors that will fly aboard the telescope have completed the coating process at Quantum Coating Inc. in Moorestown, N.J. The telescope's mirrors have been coated with a microscopically thin layer of gold, selected for its ability to properly reflect infrared light from the mirrors into the observatory´s science instruments. The coating allows the Webb...

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2011-07-20 07:35:00

A Russian radio telescope intended to be the largest of its kind in space, has started its stellar orbit around planet Earth for the first time since being launched, reports BBC News. The radio telescope, named RadioAstron, part of the Russian space observatory -- Spectrum-R -- will travel in an elliptical orbit that at its farthest point from Earth will take it close to the Moon. It was carried into orbit by the Zenith-3M rocket, taking off from Kazakhstan's Baikonur Cosmodrome on Monday...

2011-07-19 15:35:00

GREENBELT, Md., July 19, 2011 /PRNewswire-USNewswire/ -- "Secondary" may not sound as important as "primary" but when it comes to the next-generation James Webb Space Telescope a secondary mirror plays a critical role in ensuring the telescope gathers information from the cosmos. The Webb's secondary mirror was recently completed, following polishing and gold-coating. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) There are four different types of mirrors that will fly on...

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2011-07-02 07:00:00

Mirrors are a critical part of a telescope. The quality is crucial, so completion of mirror polishing represents a major milestone. All of the mirrors that will fly aboard NASA's James Webb Space Telescope have been polished so the observatory can see objects as far away as the first galaxies in the universe. The Webb telescope is comprised of four types of mirrors. The primary one has an area of approximately 25 square meters (29.9 square yards), which will enable scientists to capture light...

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2011-04-15 08:35:00

The first six of 18 segments that will form NASA's James Webb Space Telescope's primary mirror for space observations will begin final round-the-clock cryogenic testing this week. These tests will confirm the mirrors will respond as expected to the extreme temperatures of space prior to integration into the telescope's permanent housing structure. The X-ray and Cryogenic Facility at NASA's Marshall Space Flight Center in Huntsville, Ala. will provide the space-like environment to help...


Latest Optical telescope Reference Libraries

0_035f33139a46eac03f7b1ef5a5cd27be
2010-09-24 17:50:57

A telescope, designed to aid the observation of remote objects, collects some form of electromagnetic radiation (such as visible light). The Netherlands developed the first known practical telescope in the 17th century. The term "telescope" was termed in order to describe Galileo's instruments in 1611. However, Galileo was not the inventor of the telescope. It was Hans Lippershey, Zacharias Janssen, and Jacob Metius who are credited with the creation of the telescope. In 1668, Isaac Newton...

7_a202abfa2c4d560e759cbc1e39a671ec2
2004-10-19 04:45:43

Very Large Telescope -- The Very Large Telescope (VLT) consist of four optical telescopes that have 8.4 meter aperture. The VLT is a project of the European Southern Observatory organization. It is located at the Paranal Observatory on Cerro Paranal, a 2,635-m high mountain in the Atacama desert in northern Chile. The VLT consists of a cluster four of large telescopes, and an interferometer (VLTI) which will be used to resolve fine features. The telescopes have been named after the...

7_1425bbfd8456dddf5a9b74ae223090732
2004-10-19 04:45:43

Telescope -- A telescope is an instrument composed of one or more lenses or mirrors to gather and focus electromagnetic radiation. Telescopes increase the observed angular size of objects, as well as their apparent brightness. The largest telescopes are used in astronomy. A telescope was first turned on the sky by Galileo Galilei, the Italian scientist. (Telescopes used for non-astronomical purposes may be called "transits," "monoculars," "binoculars," "camera lenses," or "spyglasses".)...

7_6780e401a19a2a410cc76091e7c2309a5
2004-10-19 04:45:43

Adaptive Optics -- Adaptive optics is a technology to improve the performance of Earth-based telescopes, reversing the effect of atmospheric distortions. When light from a star or another astronomical object enters the Earth's atmosphere, the different temperature layers and different wind speeds distort and move the image in various ways (see seeing for a proper discussion). The net result is that an 8 meters or 10 meters telescope (like the VLT or Keck), while theoretically capable...

7_6780e401a19a2a410cc76091e7c2309a4
2004-10-19 04:45:43

Active Optics -- Active optics is a relatively new technology for astronomic telescopes. Most modern telescopes are reflectors, with the primary element being a very large mirror. Historically, a fixed weight-to-diameter relation was used to build these mirrors, limiting their maximum diameter to 5 or 6 meters (200 or 230 inches), like in the Palomar Observatory. A new generation of telescopes uses instead very thin mirrors, uncapable of sustaining themselves. Instead, an array of...

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Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
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