How is lightning initiated in thunderclouds? This is difficult to answer – how do you measure electric fields inside large, dangerously charged clouds? It was discovered, more or less by coincidence, ...

Stars like the Sun are remarkably constant. They vary in brightness by only 0.1% over years and decades, thanks to the fusion of hydrogen into helium that powers them. This process will keep the Sun ...

Stars like the sun are remarkably constant. They vary in brightness by only 0.1 percent over years and decades, thanks to the fusion of hydrogen into helium that powers them. This process will keep ...

Imagine that the Sun is on the verge of exploding. Or that a planet-killing asteroid is headed our way. Or maybe you just ...

When massive stars die, they sometimes go supernova – exploding in incredible bursts of energy. Scientists haven’t spotted one in our own galaxy since 1604, and that explosion happened about 20,000 ...

The Earth of today is a lush garden that supports countless living organisms, but give it a few billion years, and Earth will be swallowed up by the Sun. Or maybe not. Astronomers have discovered an ...

Research by a Danish physicist suggests that the explosion of massive stars – supernovae – near the Solar System has strongly influenced the development of life. Prof. Henrik Svensmark of the ...

An incredible new video taken by a NASA astronaut living aboard the International Space Station shows an epic explosion over Earth. But it’s not warfare or any other man-made horror that created the ...

SpaceX’s Super Heavy-Starship rocket achieved its first successful full test flight on Thursday, returning from space and landing safely without exploding after launching from Texas. The test mission ...

A new video from an astronaut's vantage point in space catures a bright green burst over Earth as a meteor exploded in the night sky. NASA astronaut Matthew Dominick, commander of the SpaceX Crew-8 ...