Astronomers have discovered a giant, 500-light-year-wide cavity between two star-forming regions in the constellations Perseus and Taurus. An ancient supernova could be the culprit.

Meteors from the Ursids appear near the Little Dipper, which is part of the constellation Ursa Minor. Only skywatchers in the ...

Far from being shooting stars, meteors are tiny fragments of cosmic debris that ignite as they enter Earth’s atmosphere, a ...