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A Satellite Of Our Own

The regular daily and monthly rhythms of Earth's only natural satellite, the Moon, have guided timekeepers for thousands of years. Its influence on Earth's cycles, notably tides, has also been charted ...
An artist
Large Asteroid Zooms Safely Past Earth

A mountain-sized asteroid made its closest approach to Earth at 9:35 a.m. Eastern Time on Wednesday, Sept. 29, 2004. Although asteroid 4179 Toutatis came no closer than four times the distance between ...
This is an artist
Cosmos Provides Astronomers with Planet-Hunting Tool

If only astronomers had a giant magnifying glass in space, they might be able to uncover planets around other stars. Now they do -- sort of. Instead of magnifying a planet, astronomers used the magnif ...

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