A friend tells you that a lunar eclipse will take place the following week. You and your friends decide to stargaze and observe the eclipse. Having recently seen a special on imaging astrological objects, you are curious what the eclipse might look like from different perspectives in space. If the moon" has a diameter of 2.159.14 miles, what is the maximum distance that it could be observed by the naked eye with enough detail that you could distinguish it from other celestial bodies (assuming that you have 20/20 vision)?

(b) One of your friends wants to buy a telescope to stargaze. If you and your friends want to observe Mercury after sundown, what is the mininnun magnifying power of the telescope needed? (the radius of Mercury is 1,516 miles. and it is 48 million miles away from the earth).

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1 The human eye with 2020 vision has limit of 1 arcminute that is 0016 deg... View the full answer