Single Greeting Cards Of The Tadpole Galaxy: Distorted Victim of Cosmic Collision, From Nasa Hubble Space Telescope
by Epic Greeting Cards
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Last refresh Jul/23/2017 12:10 PM
This odd-looking galaxy with the long streamer of stars appears to be racing through space, like a runaway pinwheel firework. Dubbed the Tadpole, this spiral galaxy and its distorted shape was caused by a small very blue, compact galaxy in the upper left corner of the more massive Tadpole. The Tadpole resides about 420 million light-years away in the constellation Draco. Seen shining through the Tadpole's disk, the tiny intruder is likely a hit-and-run galaxy that is now leaving the scene of the accident. Strong gravitational forces from the interaction created the long tail of debris, consisting of stars and gas that stretch out more than 280,000 light-years. Numerous young blue stars and star clusters, spawned by the galaxy collision, are seen in the spiral arms, as well as in the long "tidal" tail of stars. Each of these clusters represents the formation of up to about a million stars. Their color is blue because they contain very massive stars, which are 10 times hotter and 1 million times brighter than our Sun. Once formed, the star clusters become redder with age as the most massive and bluest stars exhaust their fuel and burn out. These clusters will eventually become old globular clusters similar to those found in essentially all halos of galaxies, including our own Milky Way. Two prominent clumps of young bright blue stars in the long tail are separated by a gap, a section that is fainter than the rest of the tail. These clumps of stars will likely become dwarf galaxies that orbit in the Tadpole's halo. The galactic carnage and torrent of star birth are playing out against a spectacular backdrop: a wallpaper pattern of 6,000 galaxies.
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