Latest Impact event Stories

2009-10-07 14:20:00

Using updated information, NASA scientists have recalculated the path of a large asteroid. The refined path indicates a significantly reduced likelihood of a hazardous encounter with Earth in 2036. The Apophis asteroid is approximately the size of two-and-a-half football fields. The new data were documented by near-Earth object scientists Steve Chesley and Paul Chodas at NASA's Jet Propulsion Laboratory in Pasadena, Calif. They will present their updated findings at a meeting of the American...

2009-07-21 07:57:54

University of Oregon-led research team digs up strongest evidence yet for a controversial cosmic event A 17-member team has found what may be the smoking gun of a much-debated proposal that a cosmic impact about 12,900 years ago ripped through North America and drove multiple species into extinction. In a paper appearing online ahead of regular publication in the Proceedings of the National Academy of Sciences, University of Oregon archaeologist Douglas J. Kennett and colleagues from nine...

2009-04-27 09:15:00

Impact didn't lead to mass extinction 65 million years ago, geologists find The enduringly popular theory that the Chicxulub crater holds the clue to the demise of the dinosaurs, along with some 65 percent of all species 65 million years ago, is challenged in a paper to be published in the Journal of the Geological Society on April 27, 2009. The crater, discovered in 1978 in northern Yucutan and measuring about 180 kilometers (112 miles) in diameter, records a massive extra-terrestrial...

2009-04-22 16:28:22

The European Space Agency says scientists are getting ready for an international meeting to discuss preparations for a near-Earth flyby of asteroid Apophis. The first International Academy of Astronautics Planetary Defense Conference will be held in Granada, Spain, next week. Among topics to be discussed is the April 13, 2029, Earth flyby of asteroid Apophis. The ESA said specialists in astrometry, orbital dynamics, aerothermodynamics and impact modeling will join spacecraft mission...

2009-03-25 14:40:00

For the first time in history, scientists have matched a meteorite on Earth with a specific asteroid, providing insight into how the planets were formed and how to best avoid a potential asteroid catastrophe sometime in the future. Last October, astronomers began tracking a small asteroid heading toward Earth before it became a "shooting star."  The asteroid appeared to mostly blow up in the sky 23 miles above the ground, leading scientists to believe there would not be any space rocks...

2009-01-12 13:25:00

Italian astronomer Andrea Boattini discovered six comets in 2008 while tracking cosmic debris throughout the solar system at Mount Lemmon Observatory in Arizona. And though it isn't a world record, the discovery of six comets in one year is the most found by an Italian astronomer since the mid-19th Century. The Catalina Sky Survey is part of a NASA project to find and track near-Earth objects (NEOs) using two telescopes in Arizona and one in Australia. In 1998, NASA started compiling an...

2009-01-08 11:04:15

The University of Arizona's Catalina Sky Survey has been awarded a $3.16 million NASA grant to continue its search for near-Earth objects, or NEOs, through 2012.Under the direction of Stephen M. Larson of the UA's Lunar and Planetary Laboratory, the survey, known as CSS, has discovered about 70 percent of all NEOs found in past three years. CSS tallied 565 NEO discoveries in 2008, which broke its record-setting number of 460 NEO discoveries in 2007.Thanks to an additional $250,000 NASA grant,...

2009-01-02 08:30:00

Abundant tiny particles of diamond dust exist in sediments dating to 12,900 years ago at six North American sites, adding strong evidence for Earth's impact with a rare swarm of carbon-and-water-rich comets or carbonaceous chondrites, reports a nine-member scientific team. These nanodiamonds, which are produced under high-temperature, high-pressure conditions created by cosmic impacts and have been found in meteorites, are concentrated in similarly aged sediments at Murray Springs, Ariz.,...

2008-12-15 13:17:15

A U.S. geosciences professor says dinosaurs died gradually from climate change caused by volcanic eruptions in India and not because of a meteor strike. Gerta Keller of Princeton University admits her theory contradicts the long-held hypothesis that dinosaurs died due to climate change after a giant meteor hit the Yucatan region of Mexico. Keller bases her theory on her National Science Foundation-funded field work in India and Mexico that uncovered geologic evidence that the mass extinction...

2008-12-03 07:15:00

According to Professor Richard Crowther, a leading analyst for the United Nations, the international community must work together to stop the threat of asteroids colliding with Earth. A group of space experts called the Association of Space Explorers (ASE) have called for a coordinated response to the threat and say missions to stop asteroids will need global approval. The UN will discuss the issue in February. In the ASE report, the group points to history to show the dangers of asteroid...

Latest Impact event Reference Libraries

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...

2004-10-19 04:45:40

Near-Earth Asteroid -- Near-Earth asteroids (NEAs) are asteroids whose orbit intersects Earth's orbit and which may therefore pose a collision danger, as well as being most easily accessible for spacecraft from Earth. In fact, some near-Earth asteroids can be reached with much less ΔV than the Moon. The most famous near-Earth asteroid is 433 Eros that was visited by NASA's Near Earth Asteroid Rendezvous probe. A few hundred such near-Earth asteroids are known, ranging in size up...

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Word of the Day
  • Remarkable; prodigious.
  • Audacious; gutsy.
  • Completely; extremely.
  • Audaciously; boldly.
  • Impressively great in size; enormous; extraordinary.
This word is probably from the dialectal 'boldacious,' a blend of 'bold' and 'audacious.'