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

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.

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

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

Beyond our solar system, sub-Neptunes — gassy planets larger than Earth but smaller than Neptune — reign as the most common type of exoplanet observed in our galaxy. Despite their prevalence ...

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

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

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 ...

Two occurrences of the world’s greatest science festival took place last month — one in La Palma, Canary Islands, and one in ...

On May 7, 1617, the German astronomer David Fabricius passed away. A contemporary of Johannes Kepler, the two frequently corresponded. I thought about him the other day when I was observing the Sun.