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Planets
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During a total solar eclipse, the umbra reaches the Earth. During an annular eclipse, it does not. An eclipse occurs when the Moon passes in the path of the Sun and Earth.

Windows to the Universe explores the Earth, planets of our solar system, and the universe. It includes images...
Hubble Space Telescope image courtesy Space Telescope Science Institute

SEGway is a gateway to astronomy and space science resources. Find lessons on auroras, comets...
Image of the stars in the eastern sky at 10:00 PM, December 2008.

Tonight's Sky is a monthly stargazing guide providing information about constellations, deep sky...
Photo copyright R. Gendler: Image that reveals that the Andromeda Galaxy's (M31's) core is composed of a ring of old, red stars and a newly discovered disk of young, blue stars.

Astronomycenter.org is a collection of Astronomy 101 reviewed digital resources for teachers and students...

NASA

NASA

NASA

National Science Foundation
  See All 7 planets Resources  
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