Scientists have discovered a new supernova—a star exploding after collapsing under its own gravity—thanks to a curve in spacetime. In comes in the wake of the discovery of SN 2023ixf, a supernova just ...

Photons are indeed massless, but they still travel through our universe. You can picture the fabric of the cosmos as a sort of grid — one that is four-dimensional and incorporates not only the three ...

In 1797, English scientist Henry Cavendish measured the strength of gravity with a contraption made of lead spheres, wooden rods and wire. In the 21st century, scientists are doing something very ...