What researchers are calling a "Once-in-a-lifetime event," is a nova, or explosion, between two suns 3,000 lightyears away.
Stars are born from vast clouds of gas and dust, known as nebulae, that are scattered throughout most galaxies. Over thousands to millions of years ...
Decades of constant X-ray emission from the Helix Nebula’s white dwarf suggest debris from a Jupiter-sized planet steadily rains upon the star.
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