When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...
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The moon is getting slightly farther away from the Earth each year — a physicist explains why
Scientists measure the distance to the Moon by bouncing lasers off mirrors placed there by space probes and astronauts.
Observe over hours: As the night progresses, the moon climbs higher; seeing its movement is part of the magic. For viewers in ...
The Moon is getting 1½ inches (3.8 centimeters) farther away from the Earth every year. Scientists measure the distance to the Moon by bouncing lasers off mirrors placed there by space probes and ...
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