From the fall of an apple to the glow of the farthest known star, gravity quietly choreographs almost everything that happens ...

Their tests spanned the entire life cycle of the collision: inspiral, merger, and ringdown. Remarkably, the constraints were ...

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

Scientists pushed photons across the universe to test the speed of light—and found Einstein’s cosmic speed limit still holds firm.

The universe rarely fails to amaze. One of its latest surprises—nicknamed the “Einstein zig-zag”—reveals a stunning arrangement of galaxies and a distant quasar. Together, they produce a gravitational ...

The faster you move, the stranger time becomes. By imagining how light travels to two people moving at different speeds, Einstein showed that time isn’t absolute. His thought experiment revealed that ...

To understand gravity, Einstein had to rethink space and time as a single connected fabric. He showed that mass bends this fabric, guiding how everything moves. NOVA is available to stream on pbs.org ...

What is the universe made of? -- A revolution in space and time -- A cosmic expansion -- Einstein's telescope -- MACHOs and WIMPs -- Black holes and planets -- Weighing the universe -- Cold dark ...