08-06-2007, 06:25 PM
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Hummer Messiah
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Join Date: Jan 2003
Location: ENRAGEMENT FOR HIRE
Posts: 31,286
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Re: 2 moons
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Originally Posted by MarineHawk
Okay, I?m not a scientist, but to look the same size, both the Moon and Mars would have to have the same ratio of their diameters to their distances from the earth (i.e., an object that is twice as far away, but twice as big, as another object will appear to be the same size as the other object to the viewer).
MARS:
- Diameter = 4,226 mi
- Distance from earth (as stated in the cited thingy) = 34,650,000 mi
- Diameter/distance ratio = 0.000122
MOON
- Diameter = 2,159 mi
- Distance from earth = 238,857 mi
- Diameter/distance ratio = 0.00904
Thus, Mars at 34.65M miles away, will look 1/74th (0.000122/0.00904) the size of the Moon.
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So Mars will be twice as big as the Moon on that day?
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