Telescope Space
Are there any man made objects on the moon viewable from the Hubble space telescope ?
It seems like we should be able to see the moon lander etc from the space telescope.
No the Hubble Telescope doesn't have the resolution but NASA has returned high-def pictures of all 5 Apollo landing sites. You can see man made structures plus astronaut foot paths. See below.
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How big would a space telescope need to be in order to take images of earth sizes planet at ....?
least 30 year lights away? In comparison, how many times bigger would that be when comparing it to the Hubble space telescope?
At 30 LY (= 2.840 X 10^14 km), Earth's disc of dia. 12750 km appears at a angle(Radian) measure
4.49 X 10^-11 Radian
= (4.49 X 10^-11) X (180 / TT) = 2.572 X 10^-9 degrees = (9".26 X 10^-6)arc.
People want the aperture (of the telescope) in inches, so
Aperture (dia.of Objective lens) = 4.5 / (9".26 X 10^-6)
= 485954.4 inches
= 40496.20 feet
= 7.67 miles.
Anything more than this diameter only, will resolve the Earth's disc.
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