NASA Hits Halloween Asteroid With Radar
On the afternoon of Oct. 31, 2015, Earth was visited by something much creepier than the typical Halloween trick-or-treater: a dark 2,000-foot (600-meter) -wide asteroid that sped silently (because space) by, approaching at its closest only about 1.3 times the distance to the Moon.
Designated 2015 TB145, this particular near-Earth object had only just been discovered a couple of weeks earlier. And while it posed no danger of impact, its considerable size and high velocity made the close pass a topic of interest for laypeople and scientists alike. By bouncing radar waves off its surface NASA researchers were able to generate an image of 2015 TB145, capturing details that would have been otherwise impossible due to its high velocity and incredibly dark coloration.