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Solar System
Meteorites, Comets and Asteroids
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Arctic, Antarctic, Mars
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| Topic: Meteorites, Comets and Asteroids |
06/19/06 |
| Summary: When scientists examined a meteorite from Mars under a microscope, they discovered tiny mineral spheres that, some argued, were produced by living organisms. Now, researchers working in the high Arctic have found similar mineral features, produced not by microbes, but by a volcano. |
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Finding a Rock that Knocked
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| Topic: Meteorites, Comets and Asteroids |
06/18/06 |
| Summary: Scientists have found a chunk of a meteorite that made an enormous impact crater in South Africa 146 million years ago. Found half a mile down, the chrondritic meteorite somehow survived the shock pressures and temperatures of the immense impact. Fossil meteorites have previously been found in craters.
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Itokawa Rubble Pile
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| Topic: Meteorites, Comets and Asteroids |
06/06/06 |
| Summary: A small, near-Earth asteroid named Itokawa is just a pile of floating rubble, probably created from the breakup of an ancient planet, according to a University of Michigan researcher that was part of the Japanese space mission Hayabusa. |
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Cold Case Crater
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| Topic: Meteorites, Comets and Asteroids |
06/04/06 |
| Summary: Planetary scientists have found evidence of a meteor impact much larger and earlier than the one that killed the dinosaurs -- an impact that they believe caused the biggest mass extinction in Earth's history. |
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Team Stardust
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| Topic: Meteorites, Comets and Asteroids |
05/20/06 |
| Summary: During the first week in May, representatives of each of the six Stardust sub-teams met to discuss the state of their findings and began outlining the research papers that they will submit for publication this summer. The three day workshop was held at the Timber Cove Inn, a remote seaside location north of San Francisco. |
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Carbon Copies
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| Topic: Meteorites, Comets and Asteroids |
05/09/06 |
| Summary: Like interplanetary spaceship carrying passengers, meteorites have long been suspected of ferrying relatively young ingredients of life to our planet. Using new techniques, scientists have discovered that meteorites can carry much older passengers that originated billions of years ago. |
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Contemplating Craters
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| Topic: Meteorites, Comets and Asteroids |
05/04/06 |
| Summary: In this interview, Charles Cockell and Simon Mitton discuss the awesome experience of standing at the edge of an impact crater. The explosive force of a large asteroid impact would kill anyone unlucky enough to be nearby, and craters they leave behind can serve as a reminder for dangers that still lurk in our solar system. |
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Cometary Crack Up
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| Topic: Meteorites, Comets and Asteroids |
04/29/06 |
| Summary: The NASA/ESA Hubble Space Telescope is providing astronomers with extraordinary views of comet 73P/Schwassmann-Wachmann 3 as it disintegrates before our eyes. Recent Hubble images have uncovered many more fragments than have been reported by ground-based observers. |
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The Art of Asteroid Avoidance
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| Topic: Meteorites, Comets and Asteroids |
04/25/06 |
| Summary: Over the last few decades there has been a great deal of debate about the level of danger posed by impacts from asteroids and comets. It appears the world needs to take the threat of asteroid strikes a lot more seriously. |
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Daughters of Deep Impact
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| Topic: Meteorites, Comets and Asteroids |
04/23/06 |
| Summary: Over the past five years, three space missions -- Deep Impact, Deep Space 1 and Stardust -- have provided unprecedented information about comets. |
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