Dark matter is a confounding concept that teeters on the leading edges of cosmology and physics. We don't know what it is or ...
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.
GS-z13-1, marks the earliest sign yet spotted of the era of cosmic reionization at 330 million years after the Big Bang.
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