Quantcast

Latest H. Jay Melosh Stories

Image 1 - New Research Reveals Details About Earth's Asteroid Impacts
2012-04-25 13:53:40

Lee Rannals for RedOrbit.com Researchers are reporting in the journal Nature that tiny "spherules" embedded in layers of rock have given them details about Earth's asteroid impacts. According to the team, the spherules were created when asteroids crashed into the Earth, vaporizing rock that expanded into space as a giant vapor plume. Small droplets of molten and vaporized rock in the plume then condensed and solidified, falling back to Earth as a thin layer.  These particles...

bdaf3f91009df6b1c035baee6f697ce61
2010-11-04 06:00:00

Scientists at Purdue University and Imperial College London have revised their popular "ËœImpact Effects Calculator', which allows anyone to calculate the potential damage a comet or asteroid would cause if it collided with the Earth. The interactive tool, available at http://www.purdue.edu/impactearth, lets users enter in specific details about the hypothetical impactor, such as its diameter and density, velocity, angle of entry and where it will hit the Earth. It then estimates...

9069e7b6da46f60a3163814e7cf1ced81
2005-03-09 12:40:00

Arizona -- The iron meteorite that blasted out Meteor Crater almost 50,000 years ago was traveling much slower than has been assumed, University of Arizona Regents' Professor H. Jay Melosh and Gareth Collins of the Imperial College London report in the cover article of Nature (March 10). "Meteor Crater was the first terrestrial crater identified as a meteorite impact scar, and it's probably the most studied impact crater on Earth," Melosh said. "We were astonished to discover something...


Word of the Day
drawcansir
  • A blustering, bullying fellow; a pot-valiant braggart; a bully.
This word is named for Draw-Can-Sir, a character in George Villiers' 17th century play The Rehearsal.
Related