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Venus
[ Venus ]

·Astronomy: Venus - TRANSITS OF VENUS
·Astronomy: Venus - TELESCOPIC VENUS
·Astronomy: Venus - PENCIL AND CAMERA
·Astronomy: Venus - REPAVE THE PLANET
·Astronomy: Venus - THE LAVA PLANET
·Astronomy: Venus - Impact-HAVING AN IMPACT
·Astronomy: Venus - GREENHOUSE EFFECT
·Astronomy: Venus - THE EVENING STAR
·Astronomy: Venus - CONTINENTAL DIVIDE
 

 
 
Astronomy & Telescope Astronomy: Moon History

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  Moon History Moon History: Astronomy: Moon History - A QUIET WORLD

A QUIET WORLD

Millions of years passed. The lunar crust cooled, thickened, and stiffened. Collisions continued at a great rate, but because the crust was tougher, impacts began to excavate basins and craters, and to pile up debris around them.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:14:34 CST (8 reads)
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  Moon History Moon History: Astronomy: Moon History - LIQUID ROCK

LIQUID ROCK

Lunar geologists describe the maria as vast lava flows, many of which fill large shallow basins excavated by impacts. After a basin forms, millions of years may pass before lava flows into it. In the meantime, impacts can form craters on the basin floor. Look at Archimedes in Mare Imbrium—its walls are intact but its floor is flooded by lava.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:13:47 CST (10 reads)
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  Moon History Moon History: Astronomy: Moon History - IMPACTS, CRATERS, AND BASINS

IMPACTS, CRATERS, AND BASINS

A telescope shows an amazing array of lunar features. Most are the result of impacts by meteorites, asteroids, and comets. When a piece ot rock, ice, or anything hits the Moon at several miles per second, it blows up in a cloud ot vapor, blasting a scar on the Moon's surface.

 
 
  Posted by astronomy on Saturday, December 04 @ 16:12:56 CST (8 reads)
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