Questions tagged [telescope]

Telescopes are devices that collect data (usually electromagnetic spectrum, visible or otherwise) to better resolve distant objects.

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18
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What's the largest aperture telescope sent beyond the Earth-Moon system?

The question and answer about telescopes sent to different planets got me wondering. There are so many solar system bodies that have been photographed by deep space spacecraft, planets, dwarf planet(s?...
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Were the Apollo lunar activities observed from Earth?

I understand that all manned landings on the Moon were on the near side, so technically they could be visible from Earth. Was it possible to observe landings and/or extravehicular activities (EVAs) ...
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Why should the James Webb Space telescope stay in the unstable L2?

We all know that James Webb Space telescope is planned to be launched in 2018. It has been decided that the orbit of JWST will be elliptical around the Lagrange point L2, which has been declared as ...
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Is it feasible to paint SpaceX Starlink satellites black so as not to frequently saturate the CCDs of the Large Synoptic Survey Telescope?

update: From Nature.com News article: SpaceX launch highlights threat to astronomy from ‘megaconstellations’: But an upcoming, cutting-edge telescope could be in bigger trouble. The US Large ...
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Why was the Hubble Space Telescope purged with nitrogen gas?

Wikipedia states that The telescope had to be kept in a clean room, powered up and purged with nitrogen, until a launch could be rescheduled. Spacecraft are always kept in a clean room ...
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Picture of equipment left on the Moon?

When people visited the Moon, they left sizeable items behind. I know that taking picture of this from Earth is incredibly hard, but: Did someone try? And what pictures do we have?
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Would a lunar telescope provide a significant improvement over terrestrial based equipment?

As I understand it, the moon makes for an ideal location for a telescope because it offers environmental factors that are unlike anything achievable on earth: A lack of atmosphere, light pollution, ...
4
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1answer
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How did Skylab's electrographic camera work?

This answer links to history.nasa.gov's SP-404 Skylab's Astronomy and Space Sciences. In what looks like chapter 2, page 14 there is mention of Skylab's electrographic camera, shown below. In the ...
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Is there a telescope on board the ISS?

I am wondering if there is a telescope in or outside the ISS that has been used for astronomical imaging? I have seen here that there is already a Celestron telescope on board but it is only used for ...
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How far away can spacecraft be seen with an optical telescope?

note: For the purposes of this question "optical" means near-UV through thermal IR, let's say 0.1 to 30 microns. In the question At what time in the Apollo 14 mission did the maneuver shown in this ...
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When will we have the technology to directly observe an exoplanet with significant clarity?

Are there currently any projects underway to develop a telescope which will have the ability to directly observe an exoplanet with any clarity? I don't mean blurry (yet impressive) images like this ...
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Are space camera sensors usually round, or square?

A series of round lenses produces a round image on some sort of sensor or sensor array. When it comes to cameras and telescopes out in space, are the sensors also round? It seems like most of the ...
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What are the advantages and disadvantages of sending a telescope into deep space? [closed]

When I first heard of the Voyager missions I thought this: why not do the same, only make it a telescope? I thought it would surely see a lot of things we can't see from Earth or the inner Solar ...
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Has any satellite proved the hypothesis that the Sun could be used as a gravitational lens?

Has any satellite proved the statement that the Sun's gravity could be used as a magnifying lens, focussing electromagnetic waves of distant galaxies or other celestial objects? Or, is this idea, for ...
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Aren't the mirrors of the James Webb Space Telescope too unprotected?

I've looked at the design of the James Webb Space Telescope and I got curious about something, some years ago, it seems that the international space station was hit by micro-meteorites. I'm wondering ...
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Would placing an X-ray telescope on the surface of the Moon be a good idea?

Instead of placing an X-ray telescope in orbit or deep space, would building an X-ray telescope on the surface of the Moon an good idea, since it has no atmosphere? If no, please don't forget to ...
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Has any ground-based telescope taken a picture of a geostationary broadcast satellite?

I can't find 1 image, but I've heard there are a lot of geostationary satellites. Hovering in one specific spot in the sky, rotating with the Earth's spin and tilt, rotating with Earth's orbit around ...
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Is there any Scientific Benefit to the Lower Albedo levels on the Darkside of the Moon?

I was reading the answers to this question: What did the sky actually look like from the Moon? And it got me thinking... What, if any, astronomy tasks could be performed better on the lunar far side ...
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How come we can see nearby galaxies but are unable to see TRAPPIST-1?

How do we have telescopes that are powerful enough to see nearby galaxies, such as Andromeda (M31), but are unable to see TRAPPIST-1 or the other exoplanets in its solar system in detail when TRAPPIST-...