
Channel: ScienceAtNASA
Category: Science & Technology
Description: Have you heard about an asteroid close-approach happening on April 29? Asteroid 1998 OR2 poses no threat to our planet, but we can still learn a lot by studying it. Don't miss a special Planetary Defense episode of NASA Science Live this Monday, April 27 at 3:00 p.m. EDT to learn how we find, track and monitor asteroids and near-Earth Objects: nasa.gov/live

![video thumbnail for: Journey to the Andromeda Galaxy [4K]](https://i.ytimg.com/vi/-ybiXR2WCFQ/mqdefault.jpg)

















