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Question: How big of a telescope will Psyche's deep space optical communications demonstrator use out at 5 AU? 1 Yes telescope. … We might think of a transmitting laser collimator and receiving photodiode collector as just a concentrator, but the optics is at minimum that of a single-pixel telescope. …

The ISS has an X-ray telescope called NICER and this answer in Astronomy SE (and links therein) explain that it was able to show that there are hot spots clustered near one pole of the pulsar PSR J0030 … There have been several mentions of a telescope inside the ISS that people can point out a window, but I don't think this can be used practically for astronomical observations. …

I always imagine that these instruments look roughly like the 6 inch Maksutov or Cassegrain telesopes you see in telescope/binocular stores, or the backs of astronomy magazines. … So this size instrument could be called both a telescope, and a camera with a really long focal length lens. …

Question: How far away can spacecraft be seen with an optical telescope? …

[citation needed] The optical portion of the camera was built as a Cassegrain telescope. …

In the image I see what looks like a Cassegrain optical telescope except that there are also electron trajectories shown and a magnetic field. …

Question: What kind of optical design is used by the GEDI's receiving telescope, what holds the secondary mirror and focal plane system in place, and how does the detector connect to the rest of the electronics …

in Astronomy SE quotes Assessment of Options for Extending the Life of the Hubble Space Telescope: Final Report as follows: Hubble was designed with an anticipated 15-year lifetime based on the expected …

Will there be live telescope feeds just in case there's a plume? I think it's going to hit the far side of the Moon so the chances of seeing anything thrown up by the impact are probably very low. …

it was last seen by Earthlings at least at 2018-03-19 03:22:33 UTC by a 1 meter telescope in South Africa. … Based on known albedo and trajectory, when could Roadster be potentially detectable again by this telescope? At that time of year, will Roadster's position be viewable at night from this location? …

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 Synoptic Survey Telescope (LSST) will use an enormous camera to study dark matter and dark energy, asteroids and other astronomical phenomena. …

The ISS serves as a platform for both Earth and astronomical observational instrumentation. Do routine movements of the crew or other objects ever cause problems for these observations through eithe …

From Gizmodo's There's Poop on the Moon list of things left on the moon: This gold-plated telescope that was the first tool used to make astronomical observations from the surface of another planetary … Carruthers' Telescope and one of the images there shows much better detail. Was it "point and shoot" or semi-autmoatic? Film-only or some video or electronic measurements as well? …