What's Hot This Week Saturn's Moons Engage in Cosmic Paintball Fight By SPACE.com Staff Five of Saturn's inner moons are engaged in a cosmic paintball fight, pelting each other with particles that leave bright, colorful splotches and may be the source of a Pac-man feature on one of the satellites.     Small Asteroid Zips Close By Earth as Astronomers Watch By Tariq Malik A small asteroid passed close by Earth today (Oct. 12), flying within the orbit of the moon while astronomers watched to see if the encounter caused any quakes on the space rock.     Sponsored by: 500th Alien Planet Could Be Discovered This Month Great Time to Observe the Moon and Its 'Seas' Cracks in the Universe: Physicists Search for Cosmic Strings SpaceShipTwo's Tourist Joyrides Could Launch Next Year Space Toilet Technique: NASA's How-To Video

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