Huge asteroid 1998 OR2 will zip harmlessly by Earth April 29. See the latest telescope photos.

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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