The radio arrays currently have the best resolution of any kind of telescope with 0.001 arcseconds. Calculate the diameter required of an optical telescope to achieve same resolution.

(1) 6. (5) The Hubble Space Telescope orbits the Earth every 95 minutes, taking breathtaking images of our universe. Calculate its altitude above the Earth's Surface. Fc N 47₁1² T2 r ? 11 G GM = 3√T²2GM G₂

Geostationary satellites cannot be seen in a telescope from Albany because they are always directly over the Equator. True False

The 305-m diameter Arecibo radio telescope (located in Puerto Rico) is shown below, prior to its unfortunate recent collapse. Approximately how close on the sky could two radio stars be located while still being distinguishable as separate stars by Arecibo? Assume radio waves of frequency 1420 MHz (the famous atomic hydrogen line). 17 arcsec 17 arcmin 29 arcmin 2.9 arcmin 17,000 arcsec

You observe two objects with the same telescope. The telescope is only able to gather visible light. The light you observe from object A has a longer wavelength than the light you observe from object B. Based on this information, which of the following statments MUST be true Light is being reflected from object A Light observed from object B is bluer Light observed from object A is redder Light is being reflected from object B Light is being scattered from object B

The earliest used telescopes by astronomers were?

Which power of a telescope is least important to an astronomer? light-gathering resolving magnifying