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Results #1-#10 of 87
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Match Score:
100
Byline:
D. Stern
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This interesting site describes the early evidence for a round Earth and also Eratosthenes remarkable measurement of Earth's circumference. You'll see that Columbus was not the first…
  
Match Score:
100
Byline:
Publisher: National Geographic
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The Solar System Builder enables you create a solar system and watch how it evolves over time. You can choose the type of star and the size and initial velocity of the planets…
  
Match Score:
100
Byline:
C. Porco
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Visit this site for images from the Cassini mission to the outer planets. Don't miss the text on the homepage and especially the movie "Planet Wars" (with sound).
  
Match Score:
100
Byline:
Publisher: BBC
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This article from the BBC describes some of the controversy in the theory that the mass extinction of the Cretaceous period was caused by a meteorite impact. The crater thought by…
  
Match Score:
100
Byline:
Publisher: NASA
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This article from the NASA Astrobiology Institute raises some issues in the accepted theory that the mass extinction event of the late Cretaceous was caused by a meteorite impact.…
  
Match Score:
100
Byline:
Publisher: Discover
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This article from Discover magazine overviews twenty ways the planet could experience mass extinction or worse. Examples include asteroid impact, alien invasion, and gamma-ray bursts.
  
Match Score:
100
Byline:
Lunar and Planetary Institute
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This Lunar and Planetary Institute webpage provides information about the characteristics and formation of impact craters on Earth and the moon. Earth's significant impact craters…
Impact Craters  [ Book Section ]
  
Match Score:
100
Byline:
National Aeronautics and Space Administration
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This page is a section from a teacher's guide covering the moon and lunar features. In this section, the guide includes a explanation of lunar craters, and student activities…
  
Match Score:
100
Byline:
P. Plait
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This blog post on Bad Astronomy explains how the odds of being killed by a meteorite (or asteroid) are much greater than the odds of only being hit by one. The article also describes…
  
Match Score:
100
Byline:
University of Tennessee, Knoxville Department of Physics and Astronomy
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This page provides a description of the lunar surface. The page contains one about the Maria and the Lunar Highlands, as well as the cratering density and the lunar surface material.…
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Results #1-#10 of 87