How Sentinel will hunt for hidden asteroids
Friday, June 6, 2014 - 09:02
in Astronomy & Space
Asteroids of various sizes whiz past our planet all the time. Some we know about, but many we don't, and new ones are identified on an almost weekly basis. (In fact one such recently-discovered asteroid named 2014 HQ214, an object the length of an aircraft carrier, will pass us at a mere 3 lunar distances today June 8… watch live coverage here.) And, of course, some actually do impact Earth, and if they are large enough the results can be quite… energetic, to put it lightly.