Quantcast

Latest Impact event Stories

112c52bd7dc2aabe5c6299681414e83a
2008-09-03 07:10:00

There's more than one way to watch a meteor shower. One, the old-fashioned way: Find a dark place with starry skies and count the meteors streaking overhead. Two, the new way: Find a dark place with starry skies and then completely ignore the meteors. Instead, watch the Moon. That's where the explosions are. On August 9th, a pair of amateur astronomers on opposite sides of the United States did it the new way. With the Perseid meteor shower just underway, they fixed their cameras on the Moon...

c369959f98d49ca7f8ddf78b7def1a921
2008-06-25 12:52:18

The dramatic differences between the northern and southern hemispheres of Mars have puzzled scientists for 30 years. One of the proposed explanations--a massive asteroid impact--now has strong support from computer simulations carried out by two groups of researchers. Planetary scientists at the University of California, Santa Cruz, were involved in both studies, which appear in the June 26 issue of Nature. "It's a very old idea, but nobody had done the numerical calculations to see what...

6dc60447cc85aef54993b6fb315edfe21
2008-06-16 09:05:00

If you are curious about Earth's periodic mass extinction events such as the sudden demise of the dinosaurs 65 million years ago, you might consider crashing asteroids and sky-darkening super volcanoes as culprits.But a new study, published online yesterday (June 15, 2008) in the journal Nature, suggests that it is the ocean, and in particular the epic ebbs and flows of sea level and sediment over the course of geologic time, that is the primary cause of the world's periodic mass extinctions...

2008-06-14 06:00:00

ASTEROIDS The asteroid presumed to have wiped out the dinosaurs struck the Earth with such force that carbon deep in the planet's crust liquified, rocketed skyward, and formed tiny airborne beads that blanketed the planet, say scientists from the U.S., U.K., Italy, and New Zealand. The beads, known to geologists as carbon cenospheres, cannot be formed through the combustion of plant matter, contradicting a hypothesis that the cenospheres are the charred remains of an Earth on fire. If...

a82e531d4fa285b92c9ee46c19367cef
2008-05-05 11:00:00

The asteroid presumed to have wiped out the dinosaurs struck the Earth with such force that carbon deep in the Earth's crust liquefied, rocketed skyward, and formed tiny airborne beads that blanketed the planet, say scientists from the U.S., U.K., Italy, and New Zealand in this month's Geology.The beads, known to geologists as carbon cenospheres, cannot be formed through the combustion of plant matter, contradicting a hypothesis that the cenospheres are the charred remains of an Earth on...

3c89bce1b49f2d4fdde4486ff3cc919b1
2008-04-11 10:25:00

Meteorite linked to mass extinction 65 million years ago was four to six kilometers in diameter Scientists have developed a new way of determining the size and frequency of meteorites that have collided with Earth. Their work shows that the size of the meteorite that likely plummeted to Earth at the time of the Cretaceous-Tertiary (K-T) boundary 65 million years ago was four to six kilometers in diameter. The meteorite was the trigger, scientists believe, for the mass extinction of dinosaurs...

2008-04-10 16:22:37

Asteroids that strike Earth have cosmic origins, but clues to the size of ancient impactors now have come from a decidedly Earth-bound source: the chemistry of ancient seawater. Asteroids and other extraterrestrial objects have struck Earth countless times over its multi-billion-year history, but most have left little visible trace. Though these cosmic projectiles pack a wallop when they collide with our planet, they often vaporize on impact or fall into the ocean, making it...

ae4dedd677a5d8ef725455dcc65bd8a81
2008-03-11 14:10:00

Brown University professor Peter Schultz's study of the Peruvian meteorite has yielded some interesting conclusions that could upend the conventional wisdom about the size and type of meteorites that can strike Earth.It made news around the world: On Sept. 15, 2007, an object hurtled through the sky and crashed into the Peruvian countryside. Scientists dispatched to the site near the village of Carancas found a gaping hole in the ground. Peter Schultz, professor of geological sciences at...

2008-01-23 14:57:25

Dinosaur doomsday was wetter than scientists have thought, according to new images of the crater where the space rock that likely killed the dinosaurs landed. Sixty-five million years ago the asteroid struck the coast of the Yucatan Peninsula, and most scientists think this event played a large role in causing the extinction of 70 percent of life on Earth, including non-avian dinosaurs. Geophysicists now have created the most detailed 3-D seismic images yet of the mostly...

2008-01-09 11:50:00

An impact with Mars by an approaching asteroid is now believed by scientists to be less likely than before. New estimates of the asteroid's orbit were made using observations from a telescope at the Calar Alto Observatory in Spain, according to the Near-Earth Object Program at NASA's Jet Propulsion Laboratory. The probability of impact was reduced to 2.5 percent reported in a January 8 update posted on the NEO website. The distance it is believed to miss Mars by is about 18,600 miles. Dubbed...


Latest Impact event 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...

3_8254e27b9fccec1aaab3b9785e39d79f2
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...

More Articles (2 articles) »
Word of the Day
bodacious
  • 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.'
Related