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A giant star’s death throes may offer the first evidence of a pair-instability supernova, and a glimpse of the first stars in the universe.
At stake are fundamental ideas about how black holes form — and a six-way bet.
How do black holes merge and make gravitational waves? Maybe with a little help from their friends.
New measurements could upend the standard theory of the cosmos that has reigned since the discovery of dark energy 21 years ago.
For the first time, researchers have created a scale model of the twisting loops of the sun’s magnetic field.
Tiny, dim “dwarf” galaxies have been found to hide gas-spewing black holes.
After an interstellar asteroid shot past the sun, scientists realized that there’s probably a lot of itinerant rocks out there.
The sun radiates far more high-frequency light than expected, raising questions about unknown features of the sun’s magnetic field and the possibility of even more exotic physics.
A strange glow coming from the Milky Way’s center was thought to be due to ordinary pulsars. But a new look at a years-old study shows that dark matter might still be responsible.