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Planetary Science
Astronomy
Moons and other natural satellites
Planet
Solar System
Space Exploration
Cosmology
Geology
Q & A About Astronomy
attributes of planets
bodies in the solar system
discoveries and research
discoveries and research 1938-1999 (archives)
fields related to planetary science
history of ideas about planetary motion
impact craters
origin of the planets
outside the solar system
plate tectonics
study of planetary atmospheres
The Geologic History of the Day
volcanoes
Astronomy
Astronomy, study of the universe and the celestial bodies, gas, and dust within it. Astronomy includes observations and theories about the ...
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