Severe storms return to batter Midwest and Plains with damaging winds, hail, and growing flood threats

Another round of severe storms and heavy downpours target the Central Plains and Midwest as a multiday event takes shape to ...

Stellar explosions come into focus with new nuclear reaction measurements

In two separate papers published in Physical Review Letters, researchers investigated the nuclear reactions that take place ...

Mega-Earth GJ 523b is 23 times as massive as our planet—but only 2.5 times as wide

It's nearly 170 million years old. It's more than 2.5 times the size of Earth. And it's the first exoplanet discovered and ...

Galactic archaeologists find stars in the Milky Way came from another galaxy 12 billion years ago

Look up on a dark night and the Milky Way appears as a calm band of stars across the sky. But our galaxy has a violent past. For more than 13 billion years it has grown through star formation and ...