Computer simulation showing the formation of twin stars

Image and simulation courtesy of Ralf Kaehler, Matthew Turk and Tom Abel.
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This computer-simulated image shows the formation of two high density regions (yellow) in the early universe, approximately 200 million years after the Big Bang. The cores are separated by about 800 times the distance between the Earth and the Sun, and are expected to evolve into a binary—or "twin"—star system. Click here to view a high-resolution version of the image. Click here to download a short video of the simulation.