When Worlds Collide: Have Astronomers Observed the Aftermath of a Distant Planetary Collision?

Astronomers announced today that a mystery object orbiting a star 170 light-years from Earth might have formed from the collision and merger of two protoplanets. The object, known as 2M1207B, has puzzled astronomers since its discovery because it seems to fall outside the spectrum of physical possibility. Its temperature, luminosity, age, and location do not match up with any theory.

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<p><a href="http://www.physorg.com/news119109042.html">When Worlds Collide: Have Astronomers Observed the Aftermath of a Distant Planetary Collision?</a></p> <p>Astronomers announced today that a mystery object orbiting a star 170 light-years from Earth might have formed from the collision and merger of two protoplanets. The object, known as 2M1207B, has puzzled astronomers since its discovery because it seems to fall outside the spectrum of physical possibility. Its temperature, luminosity, age, and location do not match up with any theory. </p>