This sort of motion is common in galaxies sporting active central supermassive black holes, like the one in the nearby elliptical galaxy M87. Astronomers have measured motion in M87’s ejecta as rapid ...

It’s finally time to watch one of the best meteor showers of the year: the brilliant display known as the Perseids. The ...

Two meteor showers —the Alpha Capricornids and Southern Delta Aquariids — reach their peaks this week. Here’s how to observe ...

Wake up early to witness the year's most dazzling planetary pairing as Venus and Jupiter close in for a celestial rendezvous.

Venus reaches its highest altitude above the eastern horizon in 2025 on Aug. 1. Venus will reach its highest altitude in the ...