Simply looking for potentially hazardous asteroids is one of the most important parts of this effort, said physicist and former astronaut Ed Lu, who helped found the B612 Foundation, a private non-profit dedicated to spotting dangerous objects from space.
Asteroid orbits can be easily estimated once they’re spotted, potentially giving years or even decades of advanced warning to civilization. Astronomers already know of more than 400,000 asteroids, of which 6,500 pass near the Earth, but there are many gaps
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