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Latest Meteorite Stories

Image 1 - Meteorite Shockwaves Cause Martian Dust Avalanches
2011-12-17 05:00:03

Dust avalanches around impact craters on Mars appear to be the result of the shock wave preceding the actual impact, according to a study led by an undergraduate student at the UA When a meteorite careens toward the dusty surface of the Red Planet, it kicks up dust and can cause avalanching even before the rock from outer space hits the ground, a research team led by an undergraduate student at the University of Arizona has discovered. "We expected that some of the streaks of dust that...

New App Helps NASA Keep Track of Meteoroids
2011-12-14 13:10:39

[ Watch the Video ] Surprising but true: Every day, on average, more than 40 tons of meteoroids strike our planet.  Most are tiny specks of comet dust that disintegrate harmlessly high up in Earth's atmosphere, producing a slow drizzle of meteors in the night sky.  Bigger chunks of asteroid and comet debris yield dozens of nightly fireballs around the globe. Some are large enough to pepper the ground with actual meteorites. With so much "stuff" zeroing in on our planet, NASA...

NASA Missing Hundreds Of Moon Rocks
2011-12-09 12:07:29

An audit of NASA has turned up evidence that hundreds of moon rocks and other space matter are apparently missing, many of which have been loaned out by the space agency. NASA Inspector General Paul Martin on Thursday issued a report stating that more than 500 pieces of moon rocks, meteorites, and other debris from space were either stolen or have been missing since 1970. That includes 218 moon samples that were stolen and later returned and about two dozen moon rocks and pieces of moon...

Princeton Model Shows Fallout Of Giant Meteorite Strike
2011-10-20 04:50:33

Seeking to better understand the level of death and destruction that would result from a large meteorite striking the Earth, Princeton University researchers have developed a new model that can not only more accurately simulate the seismic fallout of such an impact, but also help reveal new information about the surface and interior of planets based on past collisions. Princeton researchers created the first model to take into account Earth's elliptical shape, surface features and ocean...

Geologists Assess Deep Impacts Of Near-Earth Object Strikes
2011-10-18 08:03:44

Volcanologists from the Universities of Leicester and Durham have forensically reconstructed the impact of a meteorite on Earth and how debris was hurled from the crater to devastate the surrounding region. New research by Mike Branney, of the University of Leicester's Department of Geology, and Richard Brown, University of Durham, shows that some aspects of giant meteorite impacts onto Earth may mimic the behavior of large volcanic eruptions. Meteorite impacts are more common than is...

Image 1 - Researchers Take Temperature Of Mars's Past
2011-10-13 04:19:02

Researchers at the California Institute of Technology (Caltech) have directly determined the surface temperature of early Mars for the first time, providing evidence that's consistent with a warmer and wetter Martian past. By analyzing carbonate minerals in a four-billion-year-old meteorite that originated near the surface of Mars, the scientists determined that the minerals formed at about 18 degrees Celsius (64 degrees Fahrenheit). "The thing that's really cool is that 18 degrees is not...

Triple Asteroid Mash-up Could Have Yielded Almahata Sitta Meteorites
2011-10-07 09:08:17

Analysis of fragments of the Almahata Sitta meteorite, which landed in Sudan in 2008, has shown that the parent asteroid was probably formed through collisions of three different types of asteroids.  The meteorites are of particular interest because they contain material both primitive and evolved types of asteroids. The results will be presented at the EPSC-DPS Joint Meeting 2011 in Nantes, France, by Dr Julie Gayon-Markt on Friday 7th October. The meteorites are fragments of the...

Meteorites May Have Brought Precious Metals to Earth
2011-09-08 04:20:54

  Precious metals such as gold, platinum and tungsten were brought to Earth by a massive meteorite shower that occurred approximately 650 million years after the planet formed, scientists from the University of Bristol revealed on Wednesday. According to a university press release, researchers Dr. Matthias Willbold and Professor Tim Elliott of the university's School of Earth Sciences, studied nearly four billion year old rock samples recovered from Greenland. The samples, which...


Latest Meteorite Reference Libraries

6_d482c2be3fde61d7b1ea392b972acdb62
2004-10-19 04:45:41

Crater -- A crater is a circular depression on the surface of a planet, moon, asteroid, or other celestial body. Craters are typically caused by meteorite impacts, although some are caused by volcanic activity. In the center of craters on Earth a crater lake often accumulates, and in craters formed by meteorites a central island (caused by rebounding crustal rock after the impact) is usually a prominent feature in the lake. Ancient craters whose relief has disappeared leaving only a...

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Word of the Day
siliqua
  • A Roman unit of weight, 1⁄1728 of a pound.
  • A weight of four grains used in weighing gold and precious stones; a carat.
  • In anatomy, a formation suggesting a husk or pod.
  • The lowest unit in the Roman coinage, the twenty-fourth part of a solidus.
  • A coin of base silver of the Gothic and Lombard kings of Italy.
'Siliqua' comes from a Latin word meaning 'a pod.'
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