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Latest Impact crater Stories

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2008-01-21 16:25:00

"Discoveries are at hand!" That's what members of the MESSENGER science team are saying after their spacecraft flew past Mercury on Jan. 14th at a distance of only 124 miles. The historic flyby netted 500 megabytes of data (now safely downloaded to Earth) and more than 1200 photos covering nearly six million square miles of previously unseen terrain. "We're inundated with data"”it's wonderful," says mission scientist and planetary geologist Scott Murchie of the Johns Hopkins Applied...

2008-01-03 15:08:59

The possibility of an asteroid walloping the planet Mars this month is whetting the appetites of Earth-bound scientists, even as they further refine the space rock's trajectory. The space rock in question — Asteroid 2007 WD5 — is similar in size to the object that carved Meteor Crater into northern Arizona some 50,000 years ago and is approaching Mars at about 30,000 miles per hour (48,280 kph). Whether the asteroid will actually hit Mars or not is still...

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2007-07-25 13:00:00

Two NASA robots are surveying a rocky, isolated polar desert within a crater in the Arctic Circle. The study will help scientists learn how robots could evaluate potential outposts on the moon or Mars. The robots, K10 Black and K10 Red, carry 3-D laser scanners and ground-penetrating radar. The team arrived at Haughton Crater at Devon Island, Canada, on July 12 and will operate the machines until July 31. Scientists chose the polar region because of the extreme environmental conditions, lack...

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2007-01-27 07:20:00

With binoculars, examine the rugged face of the Moon. It is pocked with thousands of impact craters from interplanetary asteroids and comets. Ever wonder why Earth, a much bigger target, apparently has so few craters? They're so rare that a pristine example, the Barringer Meteor Crater in Arizona, is actually a tourist attraction. Did Earth just get lucky and dodge the heavy artillery? No, throughout the history of the solar system, Earth was bombarded even more than the Moon. But Earth is so...

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2006-11-28 13:35:00

Data supports the single-impact theory in a controversial discussion COLUMBIA, Mo. "“ The dinosaurs, along with the majority of all other animal species on Earth, went extinct approximately 65 million years ago. Some scientists have said that the impact of a large meteorite in the Yucatan Peninsula, in what is today Mexico, caused the mass extinction, while others argue that there must have been additional meteorite impacts or other stresses around the same time. A new study provides...

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2006-05-01 07:18:47

Jupiter's moon Europa is one of the most intriguing places in the solar system to Astrobiologists. An icy shell overlies a deep water ocean, and tidal flexing from Jupiter's gravity may provide energy for life. But while scientists have been talking about developing a Europa mission for some time, so far NASA has not yet sent an orbiter to investigate the moon in detail. Karl Hibbitts, a research scientist at the John Hopkins University's Applied Physics Laboratory, is working on developing a...

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2005-09-16 10:45:09

Arizona -- University of Arizona and Japanese scientists are convinced that evidence at last settles decades-long arguments about what objects bombarded the early inner solar system in a cataclysm 3.9 billion years ago. Ancient main belt asteroids identical in size to present-day asteroids in the Mars-Jupiter belt -- not comets -- hammered the inner rocky planets in a unique catastrophe that lasted for a blink of geologic time, anywhere from 20 million to 150 million years, they report in...

2005-09-06 18:15:00

PROVIDENCE, R.I. "” The surface of comet Tempel 1, hit by a NASA space probe during a spectacular July 4 experiment, bears evidence of impact craters, suggesting that the comet has collided with asteroids or other space travelers in its journeys around the Sun. Several dozen circular features that appear to be impact craters, ranging from 40 to 400 meters across, were spotted on Tempel 1 during the Deep Impact mission, according to first results from the mission team published by...

2005-08-09 23:26:17

Meteor impacts are generally regarded as monstrous killers and one of the causes of mass extinctions throughout the history of life. But there is a chance the heavy bombardment of Earth by meteors during the planet's youth actually spurred early life on our planet, say Canadian geologists. A study of the Haughton Impact Crater on Devon Island, in the Canadian Arctic, has revealed some very life-friendly features at ground zero. These include hydrothermal systems, blasted rocks that are...

2005-08-08 17:29:15

VANCOUVER, British Columbia (Reuters) - Meteor strikes may have led to the extinction of some life on Earth, but they may have also contributed to the creation of life, according to a study released on Monday. Geologists researching the crater left when the Haughton meteor slammed into what is now Canada's Arctic 23 million years ago found the impact created hydrothermal springs in the cracked rock and other conditions that would have made it easier for microbes to survive and evolve. The...


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
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'