Latest Impact event Stories
Italian astronomer Andrea Boattini discovered six comets in 2008 while tracking cosmic debris throughout the solar system at Mount Lemmon Observatory in Arizona.
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,...
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.
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.
Backyard astronomers watching the Perseid meteor shower last month saw meteoroids hitting not only Earth but also the Moon.
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.
A new study suggests that it is the ocean, and in particular the epic ebbs and flows of sea level and sediment, that is the primary cause of the world's periodic mass extinctions during the past 500 million years.
By Anonymous 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 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.
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...
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 Î”V 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...
- In dressmaking, straps running from the belt in front over the shoulders to the belt in the back, with more or less elaboration of trimming and outline. They usually broaden at the shoulder and narrow toward the waist.