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 ...

Although our universe is mostly normal matter, antimatter isn’t so hard to create — supernovae, black holes, and even bananas ...

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

An astronomer breaks down 3 key components that allow researchers to make groundbreaking discoveries — and decide when ...

NASA’s Chandra X-Ray Observatory helped diagnose the cause behind a large kink in a huge filament near the center of the ...

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

Vesta’s classification has vexed astronomers for decades, but a recent study is forcing planetary scientists to reevaluate ...

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

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

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