Gravity used to be the most dependable rule in the cosmic rulebook, the quiet background force that never changed its mind.

Spiral galaxies rotate at such a high speed that the gravity calculated only from their visible stars could not prevent them from dispersing. To solve this puzzle, physicists have postulated ...

"It highlights gravity's possible hidden complexity and invites a reevaluation of where dark matter effects originate." ...

A new physics paper takes a step toward creating a long-sought "theory of everything" by uniting gravity with the quantum world. However, the new theory remains far from being proven observationally.

Astronomers have captured the clearest picture yet of how massive stars are born, revealing a dramatic interplay between gravity and magnetic fields in some of our galaxy's most dynamic star forming ...