ScienceCasts: Rock Comet Sprouts a Tail - YouTube

https://www.youtube.com/watch?v=4I80ZXrXucI

Visit http://science.nasa.gov/science-news/science-at-nasa/2013/27nov_rockcomet/ for more! "Rock Comet" 3200 Phaethon has sprouted a tail, proving that the m...