In March 2002, the star V838 Monocerotis flared to 10,000 times its normal brightness. Hubble turned its gaze on the surprising star and captured a series of images of a 'light echo'. As the light of the flash travels away from the star, it illuminates more and more of the usually invisible gas and dust around the star. The cause of this mysterious outburst is still unknown, though scientists have some theories.
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