«NASA already is working to find asteroids that might be a threat to our planet, and while we have found 95
percent of the large asteroids near the Earth's orbit, we need to find all those that might be a threat to Earth,» said NASA Deputy Administrator Lori Garver.
«NASA already is working to find asteroids that might be a threat to our planet, and, while we have found 95
percent of the large asteroids near the Earth's orbit, we need to find all those that might be a threat to Earth,» NASA Deputy Administrator Lori Garver said of the Grand Challenge.
Not exact matches
And yet Ceres — the
largest object in the
asteroid belt — is less than one - tenth
of a
percent the size
of Earth and less than 2 % the size
of the moon:
NASA's Spaceguard survey program, established in 1998, aims to locate and follow at least 90
percent of the estimated 1,100
asteroids that come within about 30 million miles
of Earth's orbit around the sun and that are
larger than two - thirds
of a mile wide.
If NASA held a press conference tomorrow announcing that a
large asteroid is headed our way and that there is a 50
percent chance it will hit the planet in 2080, potentially killing millions
of people, surely we would act.
Over Sentinel's 6 1/2 year mission, it will complete NASA's mandate to find 90
percent of the near - Earth
asteroids larger than 140 meters wide.
We've found more than 95
percent of the 1 - kilometer [0.6 - miles] or
larger asteroids that could truly be very hazardous to civilization.
New high - resolution observations
of Vesta by the DAWN mission reveal that the creatr is part
of an even
larger impact basin that was created by two massive overlapping impacts roughly around one and two billion years ago, which scooped out around one
percent of the
asteroid's estimated volume and blasted it into space (more from NASA's DAWN Mission and NEO Program; 1997 NASA / Hubble news release; Cornell University; Thomas et al, 1997; Kelley et al, 2003; and Jerry Coffrey, Universe Today, June 15 2009; and Russell et al, 2012; Jaumann et al, 2012; Marchi et al, 2012; and Schenk et al, 2012).
The researchers calculate that the
largest near - Earth
asteroid, 1036 Ganymed, could maintain a dust cloud
large enough to block out 6.58
percent of the solar radiation that would normally reach Earth, more than enough to combat any current global warming trends.