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Two "moons" of Earth
July 04, 2002
While orbiting Earth during their June 1998 mission, the crew of the Space Shuttle Discovery photographed this view of two moons of Earth. Thick storm clouds are visible in the lovely blue planetís nurturing atmosphere and, what was then Earthís largest artificial moon, the spindly Russian Mir Space Station was seen above the planetís rim. The bright spot to the right of Mir is Earthís very large natural satellite, the Moon. The Mir orbited planet Earth once every 90 minutes about 200 miles above the planetís surface or about 4,000 miles from Earthís center. The Moon orbits once every 28 days at a distance of about 250,000 miles from the center of the Earth.

image: STS-91 Crew, NASA





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