The universe tells us its story mainly through light and other wavelengths of electromagnetic radiation. We learn about the planets, stars, and galaxies by their light—visible light, and also ...

The speed of light in a vacuum is the absolute speed limit of the universe. Nothing will go faster than 299,792 kilometers ...

Light pollution and its trademark “skyglow” is getting worse. Much worse. It’s getting so serious that stars, beautiful open clusters and even distant galaxies in the night sky there were ...

Judith Light doesn’t have any answers about what happens to us when we die (who does?), but she hopes that “Before,” a spooky new thriller in which she plays a ghost, will at least inspire ...

There has been light from the beginning. There will be light, feebly, at the end. In all its forms—visible and invisible—it saturates the universe. Light is more than a little bit inscrutable.

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Here’s how it works. The speed of light traveling through a vacuum is exactly 299,792,458 meters (983,571,056 feet) per second. That's about 186,282 miles per second — a universal constant ...

A broken light bulb can be dangerous in many ways, but it doesn't have to be if you use our tips for removing one. Taylor Martin CNET Contributor Taylor Martin has covered technology online for ...

The right lighting can make a big difference in your home. The way light touches a room, with a warm glow or a sharp, white brightness, can transform its aesthetics. That’s where LED bulbs come ...

Light pollution—the needless shining of bright lights into the night sky—has robbed whole generations of the chance to see nature on its largest scale. It is estimated that as many as eighty ...

"I have been briefed on an accident on the NJ Transit River Line earlier today in which the light rail struck a tree on the tracks, leading to the death of the train operator and injuring ...