2007-01-03 21:21:16 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
By the time you are about 3,000 miles up, you can pretty much see earth as a globe. Curvature (which infers round) you can see from less than two miles up over water.
2007-01-03 21:38:26 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The simplest thing to do is check out the shadow of the earth on the moon and bingo it's round, no travel or altitude required.
2007-01-04 09:09:33 · answer #2 · answered by Brian K² 6 · 1⤊ 0⤋
Well, Do you mean just to see the curvature of the earth?
You can do that from a mountain top on a clear day.
Now if you mean when you could see that it is a circle. Then there are too many answers, without more questions.
:-)
2007-01-04 05:25:47 · answer #3 · answered by craigh00000 1 · 0⤊ 0⤋
you only need to be standing on the ground about 5 to 10 miles from a big skyscrapper.
when you can see the top of the skyscrapper and know it isnt just floating there... you know that the Earth is circular.
2007-01-04 05:29:57 · answer #4 · answered by beanie_boy_007 3 · 0⤊ 0⤋
Just far enouph to see a shadow from a stick.
2007-01-04 11:30:39 · answer #5 · answered by CaveGoat 4 · 0⤊ 0⤋