No experiment has yet measured the speed of gravity, but that hasn’t prevented theorists from coming up with some answers. According to Newton, gravity acts instantly — that is, “action at a distance” ...

"Studying the rate at which galaxies formed lets us directly test our theories and, so far, we’re lining up with what general relativity predicts at cosmological scales." When you purchase through ...

Small and unassuming, Segue 1 is a nearby dwarf galaxy containing only a handful of stars—too few to provide the gravity ...

Human health is the Achilles heel of space travel. Researchers at ETH Zurich have now succeeded in printing complex muscle ...

At the heart of the proposal is a rethinking of how gravity behaves at a fundamental level. While the electromagnetic, weak and strong forces are all described using quantum field theory — a ...

Quanta Magazine: Stacy McGaugh, professor and chair of the Department of Astronomy in the College of Arts and Sciences, discussed an alternative theory of gravity—a tweaked version of Einstein’s ...

UW-Milwaukee physics and astronomy assistant professor Lia Medeiros explains gravitational waves and the role UWM played in discovering them.

A small object recently captured by Earth’s gravity may not be a natural satellite at all. According to Harvard ...

Earth and the Moon are forever locked in a gravitational embrace that has played a critical role in determining the fate of both worlds. Although they have grown more distant since their formative ...

They call it dark matter—an invisible substance thought to make up most of the universe’s mass, sculpting galaxies and clusters with its gravity. Now, researchers say they have spotted the smallest ...

A Harvard astrophysicist has stirred debate in the scientific community after suggesting that the mysterious interstellar ...

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.