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Solar System
Meteorites, Comets and Asteroids
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How a Cosmic Impact Sparked Climate Change
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| Topic: Meteorites, Comets and Asteroids |
05/24/13 |
| Summary: A new study indicates that a major impact event may have occurred near the end of the Ice Age. The global-scale combustion that followed altered Earth's climate and changed the course of life on Earth. |
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Tunguska Impact Fragments Discovered?
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| Topic: Meteorites, Comets and Asteroids |
05/05/13 |
| Summary: In 1908, a powerful explosion occurred in a remote region of Siberia near the Podkamennaya Tunguska River. The blast left no crater, but it is thought to have been caused by a meteorite or comet exploding in the atmosphere. Now, scientists may have discovered samples from the meteorite itself. |
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The Curious History of the Lyrid Meteor Shower
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| Topic: Meteorites, Comets and Asteroids |
04/23/13 |
| Summary: A shower of meteors known as the Lyrid meteors happens on Earth every year at around this time in April. In recent years, we've only received a moderate shower, but that wasn't always the case according to records of the Lyrids that date back 2,600 years. |
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How To Target an Asteroid
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| Topic: Meteorites, Comets and Asteroids |
04/19/13 |
| Summary: Scientists studying how to send a spacecraft on a collision course with an asteroid have likened the task to shooting an arrow at a target on a speeding race car. However, the scientific results of such a mission may be well worth the effort. |
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Did a Comet Kill the Dinosaurs?
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| Topic: Meteorites, Comets and Asteroids |
04/07/13 |
| Summary: Most scientists believe that the extinction of the dinosaurs was brought about by an asteroid impact. However, a new study favors a different explanation. Instead, the impact may have been caused by a high-velocity comet. |
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Dawn is in Silent Pursuit of Ceres
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| Topic: Meteorites, Comets and Asteroids |
04/02/13 |
| Summary: NASA's Dawn spacecraft left the protoplanet Vesta six months ago and is now traveling through the depths of the main asteroid belt in pursuit of the dwarf planet Ceres. |
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Is NASA Planning an Asteroid-Capture Mission?
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| Topic: Meteorites, Comets and Asteroids |
03/31/13 |
| Summary: Scientists are wondering if NASA could capture a small asteroid and bring it in near proximity to our Moon. In doing so, the asteroid would be more accessible for human explorers. |
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Ancient Asteroid Caused Global Firestorm
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| Topic: Meteorites, Comets and Asteroids |
03/30/13 |
| Summary: A new study indicates that the impact responsible for the Chicxulub crater in Mexico's Yucatan Peninsula triggered a global firestorm that led to global mass extinction. |
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Earth's Moon and Asteroids Share Cosmic History
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| Topic: Meteorites, Comets and Asteroids |
03/27/13 |
| Summary: A new study shows that the Moon has more in common with large asteroids than previously believed. The research could shed light on a period early in Earth's history when our planet was bombarded by impacts. |
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Aerial Survey Confirms Ancient Impact
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| Topic: Meteorites, Comets and Asteroids |
03/12/13 |
| Summary: Airborne geophysical surveys have been used to identify a 470-million-year-old meteorite crater near Decorah, Iowa in the United States. |
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