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Solar System
Meteorites, Comets and Asteroids
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Keeping an Eye on the Sky
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| Topic: Meteorites, Comets and Asteroids |
01/14/09 |
| Summary: The Catalina Sky Survey, which has discovered 70 percent of all known near Earth objects, is about to begin operating a new telescope. The Mount Lemmon telescope will increase survey productivity, helping to identify potentially hazardous objects like asteroids and comets on collision courses with Earth. |
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Ancient Asteroid with Earth-like Crust
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| Topic: Meteorites, Comets and Asteroids |
01/09/09 |
| Summary: According to new research, two rare meteorites found in Antarctica are from an ancient asteroid with a crust similar to that of Earth's continents. The samples are the oldest example of rock with such a composition, and shed light on the materials of the early solar system. |
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Constant Comet Threat
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| Topic: Meteorites, Comets and Asteroids |
12/11/08 |
| Summary: Comet impacts have likely transformed life on Earth, but it is still a mystery how these icy bodies are put on a collision course with our planet. New research says that nearby stars and the galaxy as a whole are to blame. |
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How To Destroy an Asteroid
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| Topic: Meteorites, Comets and Asteroids |
12/05/08 |
| Summary: Researchers are carefully observing asteroids in order to determine their composition - and the best way to protect the Earth from any that might be headed our way in the future. |
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Marco Polo and Meteorites
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| Topic: Meteorites, Comets and Asteroids |
12/01/08 |
| Summary: In this podcast, Beda Hofmann explores the links between meteorites and astrobiology, and discusses Europe's proposed Marco Polo Mission to an asteroid. |
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The Solar System in a Grain of Dust
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| Topic: Meteorites, Comets and Asteroids |
11/21/08 |
| Summary: In 2004, NASA's Stardust mission returned to Earth with particles of the comet Wild 2. Now these particles are helping scientists understand how a giant cloud of gas and dust collapsed to form our solar system 4.5 billion years ago. |
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Molten Magnetic Meteorites
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| Topic: Meteorites, Comets and Asteroids |
11/01/08 |
| Summary: Meteorites that are among some of the oldest rocks known are providing clues about the conditions of the early solar system. The insight they are yielding is changing longstanding ideas about how planets form. |
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STONE-6, Microbes 0
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| Topic: Meteorites, Comets and Asteroids |
09/30/08 |
| Summary: Using an artificial meteorite, scientists have determined that organisms in meteorites wouldn't survive a fall to Earth. However, the study does show that meteorites could still retain biosignatures that would provide evidence for life on other worlds. |
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Earth's Platinum Standard
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| Topic: Meteorites, Comets and Asteroids |
09/24/08 |
| Summary: By comparing the composition of meteorites and planets like Earth and Mars, scientists are providing clues about planetary formation in the early solar system. The study also reveals how some of Earth's rarest metals may have come from space. |
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Solar Shift
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| Topic: Meteorites, Comets and Asteroids |
09/09/08 |
| Summary: Forty years ago, strange oxygen isotopes in a meteorite were found to be different than any known planetary rock – including those from Earth and Mars. Scientists are getting closer to solving the riddle, and providing new information about the early solar system in the process. |
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