News tagged with meteorite
Mars methane linked to meteorites
Tiny amounts of methane in the Martian atmosphere may come not from living things, but from meteorites on the red planet's surface, the latest findings suggest.
Space & Earth / Space Exploration
May 31, 2012 |
4.7 / 5 (3) |
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Organic carbon from Mars, but not biological
(Phys.org) -- Molecules containing large chains of carbon and hydrogen--the building blocks of all life on Earth--have been the targets of missions to Mars from Viking to the present day. While these molecules ...
Space & Earth / Space Exploration
May 24, 2012 |
4.4 / 5 (5) |
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Rare meteorite fragment donated to UC Davis geologist
UC Davis alumnus Gregory Jorgensen ’90, Ph.D. ’95, presented UC Davis geologist Qing-Zhu Yin with a donation today, May 30, of a meteorite piece that fell beside his driveway in Coloma, Calif.
Space & Earth / Space Exploration
May 31, 2012 |
5 / 5 (3) |
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Life on Mars: just add carbon and stir
The building blocks of life have been discovered on Mars ... in Martian meteorites that fell to Earth.
Space & Earth / Space Exploration
May 29, 2012 |
3.3 / 5 (3) |
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Meteorite hunt goes on, needs public's help
(Phys.org) -- A University of California, Davis, geologist is appealing for public help in tracking down pieces of the meteorite that blew up over El Dorado County on April 22.
Space & Earth / Space Exploration
May 28, 2012 |
5 / 5 (3) |
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Research team claims to have found evidence Lake Cheko is impact crater for Tunguska Event
(Phys.org) -- Early on the morning of June 30th, 1908, a huge explosion occurred in a remote part of Siberia near the Podkamennaya Tunguska River. So great was the blast that trees were knocked down in neat ...
Space & Earth / Earth Sciences
May 21, 2012 |
4.5 / 5 (25) |
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Decoding early Martian weather: Analyzing carbonate minerals in meteorite Allan Hills 84001
(PhysOrg.com) -- While geological evidence points to the presence of liquid water on Mars during the Noachian epoch (the period from 4.5 to 3.5 billion years ago), determining the temperature of that water &# ...
Space & Earth / Earth Sciences
Oct 24, 2011 |
4.7 / 5 (6) |
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Asteroid collision that spawned Vesta's asteroid family occurred more recently than thought
A team of researchers led by a NASA Lunar Science Institute (NLSI) member based at Southwest Research Institute has discovered evidence that the giant impact crater Rheasilvia on Asteroid (4) Vesta was created ...
Space & Earth / Space Exploration
May 10, 2012 |
4.8 / 5 (4) |
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Third lunar mineral - Tranquillityite found in Western Australia
(PhysOrg.com) -- Back in the heyday of the Apollo moon program, hundreds of pounds of rock samples were carted back to Earth by visiting astronauts. Those samples were then pored over more thoroughly by geologists ...
Space & Earth / Earth Sciences
Jan 05, 2012 |
4.8 / 5 (9) |
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New Study of Meteorite Provides More Evidence for Ancient Life on Mars
(PhysOrg.com) -- In 1996, when scientists examined a meteorite from Mars previously uncovered in Antarctica, they were intrigued by what looked like microscopic fossils of ancient Martian life forms. Now, ...
Space & Earth / Space Exploration
Dec 17, 2009 |
4.8 / 5 (47) |
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Meteorites reveal another way to make life's components
(PhysOrg.com) -- Creating some of life's building blocks in space may be a bit like making a sandwich – you can make them cold or hot, according to new NASA research. This evidence that there is more ...
Mar 09, 2012 |
4.8 / 5 (11) |
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Are you a Martian? We all could be, scientists say -- and new instrument might provide proof
Are we all Martians? According to many planetary scientists, it's conceivable that all life on Earth is descended from organisms that originated on Mars and were carried here aboard meteorites. If that's the ...
Space & Earth / Space Exploration
Mar 23, 2011 |
3.8 / 5 (27) |
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Research team suggests rock found in Russia an extraterrestrial quasicrystal
(PhysOrg.com) -- Sometimes in science, the journey is just as interesting as the findings, and that certainly appears to be the case with a disparate group of scientists and their involvement with a simple ...
Jan 04, 2012 |
4.8 / 5 (15) |
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Where does all the gold come from?
Ultra high precision analyses of some of the oldest rock samples on Earth by researchers at the University of Bristol provides clear evidence that the planet's accessible reserves of precious metals are the ...
Space & Earth / Earth Sciences
Sep 07, 2011 |
4.4 / 5 (24) |
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NASA researchers search for meteorite fragments in a zeppelin
It's not every day that NASA descends on your backyard, hunting for clues to extraterrestrial life.
Space & Earth / Space Exploration
May 08, 2012 |
5 / 5 (1) |
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Meteorite
A meteorite is a natural object originating in outer space that survives an impact with the Earth's surface. While in space it is called a meteoroid. When it enters the atmosphere, impact pressure causes the body to heat up and emit light, thus forming a fireball, also known as a meteor or shooting star. The term bolide refers to either an extraterrestrial body that collides with the Earth, or to an exceptionally bright, fireball-like meteor regardless of whether it ultimately impacts the surface.
More generally, a meteorite on the surface of any celestial body is a natural object that has come from elsewhere in space. Meteorites have been found on the Moon and Mars.
Meteorites that are recovered after being observed as they transited the atmosphere or impacted the Earth are called falls. All other meteorites are known as finds. As of mid-2006, there are approximately 1,050 witnessed falls having specimens in the world's collections. In contrast, there are over 31,000 well-documented meteorite finds.
Meteorites have traditionally been divided into three broad categories: stony meteorites are rocks, mainly composed of silicate minerals; iron meteorites are largely composed of metallic iron-nickel; and, stony-iron meteorites contain large amounts of both metallic and rocky material. Modern classification schemes divide meteorites into groups according to their structure, chemical and isotopic composition and mineralogy. See meteorites classification.
For more information about Meteorite, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
