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Results tagged with earth
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user 6944
Questions of the science and space exploration related to Earth.
10
votes
Why is the earth so small when observed from the moon?
Supplemental answer, so I can post a picture:
Here's a picture of the Moon and Earth taken by the lunar orbiting Chinese satellite Longjiang-2. … Note the similarity of the size of the Earth to the Apollo picture. The Chinese satellite is farther from the moon than the Apollo modules were when the picture in the question was taken. …
- 189k
13
votes
Why is my Earth simulation slower than the reality?
The ISS takes approximately 90 minutes to circle the Earth. This presumably results in the higher apparent speed of rotation. …
- 189k
3
votes
Physical meaning of perigee advance
, page 156, has this to say:
[the figure] shows an exaggerated shift of the apsidal line with the
center of the earth remaining as a focus point. …
- 189k
6
votes
Accepted
About Mars One's journey to Mars
To fully answer your question requires giving you an enormous amount of background information.
The best explanation I have seen of this for the layman is astronaut Dr. Stan Love's presentation on wh …
- 189k
9
votes
Accepted
Could the Apollo astronauts distinguish Earth's continents and oceans from the moon?
The earth as seen from this distance - nearly a quarter of a million
miles - is an unforgettable sight.
To begin with, it looks tiny, the size of your thumbnail held at arm's
length. … From Collins, Liftoff, p. 12
This is an Apollo 16 orbital picture of the CM and Earth from the LM.
Photo credit: NASA …
- 189k