The speed of light is a fundamental constant, approximately 299,792,458 meters per second. It's the same for all observers and hasn't changed measurably over billions of years. Nothing can travel ...

NORFOLK, Va. — A light year is exactly what it sounds like: the distance light travels in one year. If you need to get somewhere quick, you'd want to jump on this train because light travels through ...

What you see in the night sky is not always reality. There are many illusions up there. Whenever you gaze upon the starry sky you do not see the stars in real-time. You’re actually staring into the ...

Humans have discovered powerful telescopes to gaze at the beautiful night sky, only to realize that distant objects in space are things of the past. The light of these distant objects takes a certain ...

Physicists from Imperial College London have achieved a groundbreaking milestone in quantum physics by reimagining the ...

Every generation grows up with starships that jump across galaxies in a heartbeat, but the real universe is far less forgiving than the screen. The same physics that lets GPS satellites work and ...

The glow from faster-than-light particles gives us a unique way to explore the universe. Nothing can travel faster than light — in a vacuum. But when light slows down, sometimes matter can blaze past ...

My telescope, set up for astrophotography in my light-polluted San Diego backyard, was pointed at a galaxy unfathomably far from Earth. My wife, Cristina, walked up just as the first space photo ...

Faster than light travel may produce gravitational waves that we could see here on Earth. Warp drives may or may not be possible, but if they are then could a distant alien civilization’s warp fields ...

Slowing down light is not as easy as it sounds. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The phenomenon of light slowing down as it passes ...