It measures 130 to 300 feet across, a pebble compared to the asteroid that killed the dinosaurs, which is estimated to have been six to nine miles in length. On the other hand, on Feb. 15, 2013, an ...
"I find this asteroid to be extremely exciting! This is the last chance we have to observe the asteroid from Gemini before 2028." ...
REx mission has an historic opportunity to closely observe the asteroid Apophis and improve our ability to defend against ...