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Hot Topic
Solar System
Meteorites, Comets and Asteroids
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Cometary Missing Link
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| Topic: Meteorites, Comets and Asteroids |
09/07/08 |
| Scientists have identified an interesting solar system object whose orbit is backwards around the sun and which may help us understand the origin of certain comets. The finding also could yield clues about the early solar system. |
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Earth's Cosmic Dust
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| Topic: Meteorites, Comets and Asteroids |
09/06/08 |
| The origin of microscopic meteorites in cosmic dust has been revealed. A new study shows that some of the cosmic dust constantly falling to Earth originates from the asteroid belt between Jupiter and Mars. |
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Meteorite Fast Track
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| Topic: Meteorites, Comets and Asteroids |
08/23/08 |
| The majority of asteroids that pass near the Earth have a different composition than most of the meteorites that actually hit our planet. Astronomers now think they may have figured out why this is the case. |
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Meteorite Acid Test
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| Topic: Meteorites, Comets and Asteroids |
07/18/08 |
| Evidence of acid rain in 1908 supports the theory that a meteorite impact was responsible for the Tunguska catastrophe. The study is uncovering important clues about how impact events can affect life on Earth. |
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Sun Pairs Asteroids
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| Topic: Meteorites, Comets and Asteroids |
07/12/08 |
| Astronomers have found that sunlight affects the formation of binary asteroids. The study sheds light on asteroid structure and could aid in the design of future sample-return missions. |
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An Exploding Asteroid
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| Topic: Meteorites, Comets and Asteroids |
07/06/08 |
| New evidence indicates that a comet or asteroid exploded over Canada 12,900 years ago. The event occurred at the end of the last Ice Age and coincides with an age of extinction. |
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100 Years After Tunguska
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| Topic: Meteorites, Comets and Asteroids |
07/04/08 |
| One hundred years ago, 800 square miles of forest was destroyed in Siberia by a powerful impact. Studying the site has revealed clues about how impacts affect ecosystems and human populations on Earth. |
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Cosmic Collisions
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| Topic: Meteorites, Comets and Asteroids |
07/03/08 |
| Researchers have been using a vast database to show that asteroids are shaped by small impacts over time. |
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We Are Meteorites
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| Topic: Meteorites, Comets and Asteroids |
06/20/08 |
| Molecules important for the origin of life have been positively identified in a meteorite. Scientists have confirmed that raw materials for the first molecules of DNA and RNA have been discovered in the Murchison meteorite. |
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Finding New Material in Old Comets
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| Topic: Meteorites, Comets and Asteroids |
06/18/08 |
| Researchers have found a new mineral, named Brownleeite, in material that likely came from a comet. The mineral was discovered in interstellar dust grains captured at high altitude in the Earth's atmosphere. |
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