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Compelling New Evidence for a Middleweight Black Hole

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Artist’s illustration of a tidal disruption event, in which a black hole tears apart a passing star and ligh...

A Puzzling Geometry Conundrum

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A Puzzling Geometry Conundrum

Why is BepiColombo back?

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Messenger’s iridescent Mercury.

Astronomers Detect First Double Helium-Core White Dwarf Gravitational Wave Source

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Astronomers Detect First Double Helium-Core White Dwarf Gravitational Wave Source