AmericaSpace Launch Countdown

Next Launch MMS on a Atlas V 421 rocket from Cape Canaveral AFB, FL
scheduled for:
13 Mar 15 2:44:00 GMT
12 Mar 15 22:44:00 EDT

Days
Hrs
Min
Sec
Click here for more details...

The Menace of the Asteroids. Part 1: The Risks

Artist’s impression of an asteroid approaching the Earth. Image Credit: Jeff Darling

Of the several hundred thousand asteroids known, about 9,000 are of the near-Earth variety, and of these more than 1,300 fall into the category known as potentially hazardous asteroids (PHAs). To qualify as a PHA, an asteroid must be able to come […]