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Hot Topic Solar System Meteorites, Comets and Asteroids
 
Glycine in the Grid
Topic: Meteorites, Comets and Asteroids
08/19/09
Summary: Scientists have discovered a fundamental building block of life in samples of a comet that were returned to Earth by NASA's Stardust spacecraft. The research supports the theory that some of the ingredients for life were delivered to the Earth by comet and meteorite impacts.

Acquitting Comets of Catastrophes
Topic: Meteorites, Comets and Asteroids
08/04/09
Summary: Scientists have long debated the role of asteroid and comet impacts in mass extinctions on Earth. New research may indicate that it is highly unlikely that comets caused any mass extinctions. The findings could have implications in determining the likelihood of globally-damaging impacts in our planet's future.

Objects Approaching Earth
Topic: Meteorites, Comets and Asteroids
08/01/09
Summary: NASA is introducing a new web site that provides information on near-Earth objects, such as asteroids and comets. Impact events have played an important role in shaping the habitability of Earth, and future impacts could have a profound effect on our planet's biosphere.

Solar System Spasm
Topic: Meteorites, Comets and Asteroids
07/22/09
Summary: New research shows that many of the objects in the asteroid belt between Mars and Jupiter were actually formed in the far reaches of the solar system. The study sheds new light on the processes behind the evolution of the planets.

The Tunguska Comet
Topic: Meteorites, Comets and Asteroids
07/04/09
Summary: In 1908, an object originating from space impacted the Earth and leveled 830 square miles of forest in Siberia. The origins of this object were a mystery until now. With science performed on the space shuttle, researchers have determined that the 1908 Tunguska explosion was caused by a comet.

Rocking the Atmosphere
Topic: Meteorites, Comets and Asteroids
06/05/09
Summary: A new study shows that frequent meteorite impacts during an early period of the solar system known as the 'Late Heavy Bombardment' may have furnished the Earth and other planets like Mars with liquid water. By providing a source of water for the Earth's oceans, these impacts could have helped to make the early earth habitable.

Bombardment No Barrier to Life
Topic: Meteorites, Comets and Asteroids
05/22/09
Summary: A new study indicates that the bombardment of Earth nearly 4 billion years ago by giant asteroids would not have been sufficient to extinguish early life on the planet. The study has important implications in understanding the timing of life's origin on Earth.

Cooking Up Comet Crystals
Topic: Meteorites, Comets and Asteroids
05/20/09
Summary: By studying sun-like stars, astronomers may have solved a mystery about the composition of comets. The study provides new insight into the processes behind planet and comet formation.

Searching for Meteorites in the Deserts of Oman
Topic: Meteorites, Comets and Asteroids
05/18/09
Summary: A group of Swiss geologists, who have conducted systematic meteorite searches in Oman since 2001, recently returned from their latest hunt. Their findings could provide valuable information about the early history of the solar system.

Life's Cometary Payload
Topic: Meteorites, Comets and Asteroids
05/17/09
Summary: Scientists studying the chemical composition of comets have determined that they contain missing ingredients needed for life on the primordial Earth. The study lends weight to the idea that cometary impacts played an important role in the origin of life.

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