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Hot Topic Solar System Meteorites, Comets and Asteroids
Centaurs in the Solar System
Topic: Meteorites, Comets and Asteroids
Summary: Scientists have long questioned the identity of 'centaurs,' the small celestial bodies orbiting between Jupiter and Neptune. A new study indicates that most of these objects are comets.

The Mystery of Chondrules
Topic: Meteorites, Comets and Asteroids
Summary: A new study could explain a 135-year-old mystery concerning how small, glassy spherules become embedded in meteorites called chondrites.

Landing on an Asteroid May Cause Avalanches
Topic: Meteorites, Comets and Asteroids
Summary: A new study shows one way in which the rubble and dust covering the surface of asteroids and comets might behave differently than particles on Earth.

The Asteroid Grand Challenge
Topic: Meteorites, Comets and Asteroids
Summary: NASA has announced a Grand Challenge focused on finding all the asteroids that could threaten the life's future on Earth - and determining what to do about them.

Meteorite Phosphorus Aided Life on Early Earth
Topic: Meteorites, Comets and Asteroids
Summary: New research shows that a key element for life on Earth was delivered to our planet on meteorites. The heavy bombardment of meteorites during the Hadean and Archean eons provided reactive phosphorus that could have been incorporated into prebiotic molecules.

NASA Radar Reveals Asteroid Has Its Own Moon
Topic: Meteorites, Comets and Asteroids
Summary: A sequence of radar images of asteroid 1998 QE2 show that it is a binary asteroid. The images suggest that the primary body is approximately 2.7 kilometers in diameter, and the satellite, or moon, is The preliminary estimate for the size of the satellite, or moon, is 600 meters wide.

How a Cosmic Impact Sparked Climate Change
Topic: Meteorites, Comets and Asteroids
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.

Tunguska Impact Fragments Discovered?
Topic: Meteorites, Comets and Asteroids
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.

The Curious History of the Lyrid Meteor Shower
Topic: Meteorites, Comets and Asteroids
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.

How To Target an Asteroid
Topic: Meteorites, Comets and Asteroids
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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