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Lindas, porém canibais... Galaxies in the River http://antwrp.gsfc.nasa.gov/apod/ap100717.html Explanation: Large galaxies grow by eating small ones. Even our own galaxy practices galactic cannibalism, absorbing small galaxies that get too close and are captured by the Milky Way's gravity. In fact, the practice is common in the universe and illustrated by this striking pair of interacting galaxies from the banks of the southern constellation Eridanus (The River). Located over 50 million light years away, the large, distorted spiral NGC 1532 is seen locked in a gravitational struggle with dwarf galaxy NGC 1531, a struggle the smaller galaxy will eventually lose. Seen edge-on, spiral NGC 1532 spans about 100,000 light-years. Nicely detailed in this sharp image, the NGC 1532/1531 pair is thought to be similar to the well-studied system of face-on spiral and small companion known as M51. The Star Streams of NGC 5907 http://antwrp.gsfc.nasa.gov/apod/ap080619.html Hydrogen in M51 http://antwrp.gsfc.nasa.gov/apod/ap100611.html Milky Way a galactic cannibal http://www.virginia.edu/insideuva/2003/18/milky_way.html -- Beijins Fa ---------------------------------------------------------------- "O Congresso tem muita gente impoluta porque não foi informada da mamata." - Millôr Fernandes ----------------------------------------------------------------
