The "potentially hazardous" asteroid 1998 OR2 is just a few weeks away from its close encounter with Earth, and you can watch the giant space rock's approach online or with a small telescope.
Huge asteroid 1998 OR2 will zip harmlessly by Earth April 29. See the latest telescope photos. : Read more
Huge asteroid 1998 OR2 will zip harmlessly by Earth April 29. See the latest telescope photos. : Read more