Jupiter’s moon Callisto passes near the planet’s northern limb, shortly before Io transits and Ganymede emerges from the gas ...

The Moon passes just 0.4° south of Virgo the Maiden's bright alpha star, Spica, early on the morning of May 10.

A bright Moon dominates the sky, passing two bright stars as Juno reaches opposition and Mercury dips toward the horizon in ...

I) Leo is a springtime constellation in the Northern Hemisphere. It lies south of the Big Dipper, the most recognized ...

Asteroid 9 Metis reaches opposition in the constellation Libra. The main-belt world is visible all night, and best positioned ...

A remnant of the Soviet Venus program, Kosmos 482 has stayed aloft in in Earth's orbit for 53 years. But it may make a return ...

Often bucking tradition, these women sought knowledge of the universe and reimagined the way we view the cosmos.

Today I want to talk about something beginning observers tend to overlook. It a process of the human eye called dark ...

The Swan Nebula (M17) glides through the early-morning sky near the border that Sagittarius shares with Scutum and Serpens ...

New views of TOI-421 b by JWST gives insight into how the most common type of planet in the galaxy might form.

The most recent measurement of a nearby galaxy cluster is deepening a disagreement about how fast the universe is expanding — ...

Starting high in the Northern Hemisphere sky, I’ll be highlighting lots of stuff over the coming weeks and months. I’m going ...