Never-before-seen images of a bouncy comet landing! Shows Philae lander attempting to touch down in the weak gravity field of Comet 67P/Churyumov-Gerasimenko.
Data indicate that small asteroids struck Earth's atmosphere - resulting in a bolide (a fireball, or bright meteor) - on 556 separate occasions in a 20-year period.
City lights drown all but the brightest stars, planets, and fireballs. But there's still some dark out there, as this satellite view of the U.S at night shows.
The first-ever comet lander - Philae - made history this week by spending some 57 hours gathering data on the surface of Comet 67P/Churyumov–Gerasimenko.