Fri, Jan 04, 2008
... But Not By A Lot
There's been another tweak to the odds an asteroid
streaking toward Mars will actually hit the planet.
As ANN reported, asteroid
2007 WD5 was first discovered in November, and drew attention
because its orbit passes near Earth. A danger of impact here was
ruled out, but odds of hitting Mars on January 30 were put at
1-in-75... then 1-in-25.
Now, the line is 1-in-28. The slight downgrade was made by
scientists at NASA Thursday after reviewing new observations from
the Magdalena Ridge Observatory in New Mexico.
"We estimate such impacts occur on Mars every thousand years or
so," NASA scientist Steve Chesley said last month, reports United
The last significant meteor impact on Earth is thought to have
been a 1908 event, in which an asteroid became super-heated as it
entered our atmosphere at Mach 60... disintegrating and creating an
explosion near Tunguska, Siberia which leveled trees for 60
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