An aerospace engineer explains why NASA, Space Force and other agencies are using or testing aerobraking for more ...

In this episode, Astronomy magazine Editor Dave Eicher invites you to head out and observe a planetary nebula in the ...

A Full Flower Moon shines in the sky tonight from sunset to sunrise. This month's Full Moon appears smaller than usual, just ...

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.

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

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 ...

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

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

In 1958 the great extragalactic astronomer George Abell of UCLA compiled a catalog of galaxy clusters. It was extended by Abell and collaborators in 1987 and eventually contained 4,076 clusters.