This groundbreaking theory explains how speed affects mass, time, and space, and introduced ... experiment showed that light’s speed is constant, regardless of Earth's motion, suggesting the ...

Scientists discovered strange light pulses that appear without buildup and resist interference, thanks to time’s one-way flow ...

Massive ripples in the very fabric of space and time wash over Earth constantly, although you'd never notice. An astrophysicist is trying a new search for these gravitational waves.

Auroras are natural light displays that occur when charged particles from the sun interact with Earth’s magnetic field and ...

Then physics says, 'Let there be light!,' and there actually is light—at one precise moment in time and point in space," says Prof. Alexander Szameit of the University of Rostock. These fleeting ...

Don Pettit spent a busy 220 days at the International Space Station. He conducted experiments, talked with students and ...

Some recent spaceflight spectacles offer hints about what you might see if Kosmos 482 happens to fall through the sky above ...

The failed Soviet spacecraft Kosmos 482 could crash to Earth overnight tonight after more than 50 years in the wrong orbit. Here are the latest predictions on the exact time of reentry ...

according to Space.com. The total flight time lasted about 70 hours, during which Tereshkova — who was 26 years old — orbited Earth 48 times. “Tereshkova’s televised image was broadcast ...