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Related: Editorials & Other Articles, Issue Forums, Alliance Forums, Region ForumsRussian Fireball Shows Meteor Risk May Be Bigger
WASHINGTON (AP) -- Scientists studying the terrifying meteor that exploded without warning over a Russian city last winter say the threat of space rocks smashing into Earth is bigger than they thought.
Meteors about the size of the one that streaked through the sky at 42,000 mph and burst over Chelyabinsk in February - and ones even larger and more dangerous - are probably four to five times more likely to hit the planet than scientists believed before the fireball, according to three studies published Wednesday in the journals Nature and Science.
Until Chelyabinsk, NASA had looked only for space rocks about 100 feet wide and bigger, figuring there was little danger below that.
This meteor was only 62 feet across but burst with the force of about 40 Hiroshima-type atom bombs, scientists say. It released a shock wave that shattered thousands of windows and injured more than 1,600 people, and its flash was bright enough to temporarily blind 70 people and cause dozens of skin-peeling sunburns just after dawn in icy Russia.
Up until then, scientists had figured a meteor causing an airburst like the one in Russia was a once-in-150-years event, based on how many space rocks have been identified in orbit. But one of the studies now says it is likely to happen once every 30 years or so, based on how often these things are actually hitting.
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http://hosted.ap.org/dynamic/stories/U/US_SCI_ASTEROID_HIT?SITE=AP&SECTION=HOME&TEMPLATE=DEFAULT&CTIME=2013-11-06-13-56-08
longship
(40,416 posts)Most small.
All we need is one of these obelisk thingies.
Maybe we can get one from Amazon or eBay.
Fumesucker
(45,851 posts)That should be plural, I think.
Myself, I'm going on a snark hunt.
The snark was a boojum, you see.
longship
(40,416 posts)NuclearDem
(16,184 posts)And that is to have snarks with frickin LASER BEAMS attached to their HEADS
hunter
(38,311 posts)And there will be fan fiction...
NuclearDem
(16,184 posts)But this time we're ready! Planetary defense systems are better than ever!
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