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Latest Impact crater Stories

Meteor Impact Crater Found Beneath Iowa Town
2013-07-11 04:39:36

Lee Rannals for redOrbit.com - Your Universe Online A meteor crater from 470-million-years-ago lies buried several hundred feet beneath the town of Decorah, Iowa, according to an airborne geophysical survey reported in EARTH Magazine. Geologists first hypothesized the crater's existence while examining cuttings from water wells drilled near the town. During this examination they discovered evidence of a previously unknown shale deposit that was nearly a perfect circle, roughly 3.4 miles...

Mercury History Masked Volcanic Activity
2013-07-05 11:03:48

Brett Smith for redOrbit.com - Your Universe Online Ever since NASA's Mariner 10 sent back the first images of Mercury, scientists have been fascinated by the planet's unusually smooth surface. According to an analysis of images provided by NASA's Mercury-orbiting MESSENGER (MErcury Surface, Space ENvironment, GEochemistry, and Ranging), a period of heavy volcanic activity essentially gave the planet a makeover about 4 billion years ago, erasing the first 400 to 500 million years of its...

Moon Mystery: GRAIL Data Show How Gravitational Anomalies Developed
2013-05-31 06:19:45

redOrbit Staff & Wire Reports - Your Universe Online Researchers from Purdue University and MIT have solved the long-standing mystery of why the moon´s gravitational force is stronger in some areas than in others. This irregular gravitational force has been observed ever since the first satellites were sent to the moon, when orbiting probes would pass over certain craters and impact basins, and periodically swerve off course before plunging toward the lunar surface and then...

Underground Explosions Responsible For Pits Inside Twin Craters On Mars
2013-04-11 11:32:25

ESA Dramatic underground explosions, perhaps involving ice, are responsible for the pits inside these two large martian impact craters, imaged by ESA´s Mars Express on 4 January. The ℠twin´ craters are in the Thaumasia Planum region, a large plateau that lies immediately to the south of Valles Marineris, the largest canyon in the Solar System. The northernmost (right) large crater in this scene was officially given the name Arima in early 2012, but the southernmost...

Copernicus crater
2013-04-03 04:40:58

April Flowers for redOrbit.com - Your Universe Online Large impacts on the Moon produce unimaginable amounts of energy; however, they may not wipe the mineralogical slate clean. New research, led by Brown University geoscientists, has discovered a rock body with a distinct mineralogy snaking 18 miles across the floor of Copernicus crater — a 60-mile-wide feature on the Moon's near side. Mineralogical signatures of rock present before the impact that created the crater appear to...

Comet May Have Caused Chicxulub Crater And Dinosaur Extinction
2013-03-24 05:34:56

Brett Smith for redOrbit.com - Your Universe Online One of the most popular theories on the disappearance of the dinosaurs surrounds the 110 mile-wide Chicxulub crater in Mexico. Many scientists believe the extinction was caused by an asteroid that crashed into Earth, leaving only a massive crater behind. However, a group of American scientists is presenting a theory that the culprit was actually a speeding comet, not a relatively slow-moving asteroid as many theories assert....

Third-Largest Asteroid Impact Crater Discovered In South Australia
2013-02-17 09:34:13

redOrbit Staff & Wire Reports — Your Universe Online A massive asteroid that crashed into Earth left behind a large impact crater in Australia and changed the entire landscape of the planet, scientists from the Australian National University (ANU) and University of Queensland claim in a recently-published study. According to Stuart Gary of ABC News in Australia, the impact zone is centered in the East Warburton Basin in the northeastern part of South Australia. It was...

Computer Simulations Help Explore Origins Of Our Solar System
2013-02-15 10:00:41

Peter Suciu for redOrbit.com — Your Universe Online Understanding past collisions between celestial bodies, including asteroids, could help researchers better understand the origins of our Solar System. After all, it was through a series of such collisions some four and a half billion years ago that our planetary system was formed. What started as a giant dusty gas cloud combined to form increasingly large clumps, and as these collided and combined, they grew into what we now...

2013-02-06 09:43:42

Revising and revisiting the Giant Impact Theory Scientists are revisiting the age-old question of how Earth's moon formed with the development of two new models that work out the complicated physics of planetary collisions. The idea of a moon-forming collision is not new: The Giant Impact Theory put forth in the 1970s suggested that the moon resulted from a collision with a protoplanet approximately half the size of ancient Earth. But the physics underlying such a collision implied that...


Latest Impact crater Reference Libraries

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2004-10-19 04:45:41

Saturn's moon Mimas -- Mimas is a moon of Saturn that was discovered in 1789 by William Herschel. Mimas' low density (1.17) indicates that it is composed mostly of water ice with only a small amount of rock. Mimas' most distinctive feature is a colossal impact crater 130 km across, named Herschel after the moon's discoverer. Herschel covers almost 1/3 of the diameter of the entire moon; its walls are approximately 5 km high, parts of its floor measure 10 km deep, and its central peak...

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2004-10-19 04:45:40

Jupiter's Moon Callisto -- With a diameter of over 4,800 km (2,985 miles), Callisto is the third largest satellite in the solar system and is almost the size of Mercury. Callisto is the outermost of the Galilean satellites, and orbits beyonds Jupiter's main radiation belts. It has the lowest density of the Galilean satellites (1.86 grams/cubic centimeter). Its interior is probably similar to Ganymede except the inner rocky core is smaller, and this core is surrounded by a large icy...

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Word of the Day
vermicular
  • Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
  • Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
  • Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
  • A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.
This word ultimately comes from the Latin 'vermis,' worm.
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