Gravity is invisible, yet it governs the cosmos, warping spacetime and bending light. This video explores Einstein’s general ...

For decades, black holes were thought to be invisible cosmic monsters that swallow everything, even light. But Stephen ...

Time moves differently in space. Near black holes, gravity slows clocks and stretches seconds. This explainer reveals how time bends and affects astronauts and Earth.

Ahead of the launch of Artemis II, the first crewed mission to the moon in more than 50 years, astronauts share the movies ...

Despite a gulf between their ideologies, Princeton University professor Robert P. George and Union Theological Seminary ...

Friedmann accepted this new term but pointed out a radical alternative: the universe did not have to be frozen. He argued that Einstein’s static universe was merely a special case and that the cosmos ...