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Home Q & A Board Science-Related Homework Help Physics
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JulieA JulieA
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12 years ago
How high up would you have to be to see the earth as a "marble" from space.  Not necessarily the size of a marble, just something similar to the famous blue marble picture.
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Julie Appleton

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#1
12 years ago
At 250,000 miles up, the Earth would appear to be four times as wide as the Moon appears from Earth.  It would look as you may have seen it in the "blue marble" pictures taken from Apollo and other spacecraft in the vicinity of the Moon.  To make the Earth "moon-sized", you'd need to be around 1 million miles away.
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#2
12 years ago
Your central field of view is about 140°.

Let's say you aim for the point, that the Earth only covers 10° of your view (still larger as the moon appears to us). That point is reached in 72900.874 km.





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