Quote from the original post September 19, 2011 at. 05:38: On Earth, the large telescopes equipped

The successor to the Hubble Space Telescope - James Webb Space Telescope (JWST) - to study the sky in infrared light (heat radiation) and is expected to be sensitive enough to see the very first stars in the universe.
The heart of the JWST telescope's main mirror will have a diameter of about 6.5 meters. But when it is to be folded during launch, built up of 18 hexagonal f18 carrier landing mirrors, each 1.3 meters from tip to tip. The mirrors are made of beryllium, because it is a very light metal, and because it has been found to work well at very low temperatures on board the space telescopes. Extremely thin layer of gold on all mirrors
The project has reached an important milestone, as all the mirrors now have the reflective coating that makes them unable to capture the infrared radiation from space.
In the case of an extremely thin layer of gold, which has been evaporated at the mirrors carefully polished surfaces. This gold coating is optimized f18 carrier landing to reflect the infrared light that JWST must observe.
While the main mirror for JWST thus takes shape, it is a different f18 carrier landing matter for the project as a whole. Right now the situation is that there must be substantial increases in funding for the project if a launch in 2018 is to be realized.
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Quote from the original post September 19, 2011 at. 05:38: On Earth, the large telescopes equipped with active and adaptive optics to compensate for the disturbance. This means a certain loss of light.
So discussed the two options that astronomers using in order to provide a sharper f18 carrier landing image, and it means the use of adaptive f18 carrier landing optics a light loss, because the insertion of a measuring f18 carrier landing instrument (wavefront sensor) in the beam path.
A few interesting links: http: //www.universetoday.com/83420/continent-wide-telescope array now-see ... and http://www.nature.com/news/2010/100407/full/ 464820a.html f18 carrier landing Let's see what the future holds, but it's a bit like in Information Technology: A hell of a lot of small is better than a large one;)
And I did certainly too;) See like: http://en.wikipedia.org/wiki/Active_optics Special: Active optics is not to be confused with adaptive optics, der operates at a shorter time scale and corrects different Distortions.
I wonder if you think of ESO's VLT at the Paranal Observatory on top of Cerro Paranal mountain in the Atacama Desert in Chile. The four telescopes are each 'only' 8.2 meters in diameter and has received the names of celestial objects according to the local folklore. Antu (Sun), Kueyen (Moon), Melipal (Southern Cross) and Yepun (Aftenstjernen ie Venus). The four telescopes together have a mirror area of 212 m , using special technique is used as an interferometer, but as you mention, it's regardless of the considerable size limited to wavelengths that can penetrate the Earth's atmosphere. Only in the room can be the full electromagnetic spectrum examined unhindered, so a ground-based telescope will not be able to outperform a space-based. .
As you know, the big advantage of space-based telescopes that are above the atmosphere, forming an effective filter for most of the electromagnetic radiation that is outside the wavelength f18 carrier landing range of 400-700 nanometers.
Although the Webb telescope has a much smaller mirror diameter than the largest terrestrial (pt. 11 m single telescope, respectively. 4 x 10 m array), this space-based telescope f18 carrier landing - like the much smaller Hubble Telescope - could take pictures with better resolution at wavelengths outside "atmosphere gap", and also spectra without disturbing lines from the atmosphere.
Karsten, On Earth, the large telescopes equipped with active and adaptive optics to compensate for the disturbance. This means a certain loss of light, and as these measures are not necessary for a space-based telescope, obtained thus better resolution and brightness.
Another debate is the telescope at all is interesting f18 carrier landing since ground-based telescopes have long surpassed the Hubble, and you risk the fact that the Webb telescope is outdated before launch.
In the eyes of the public space telescopes is equal to the Hubble Space Telescope. Since 1990 it has provided spectacular f18 carrier landing images that often found their way into media other than astronomy literature. The Hubble Space Telescope is about to sing the last verse, and now we get to the launch of the James Webb Space Telescope probably even more to marvel at.
James Webb Space Telescope has a somewhat different design f18 carrier landing than the Hubble Space Telescope. While the latter can record images in both visible and ultraviolet light, the James Webb Space Telescope designed so that it can absorb infrared wavelengths over a wide range.
By concentrating on the infrared part of the spectrum, astronomers can see both cold and warm areas where there are formed new sta