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.

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

Fabricius noted the brightness of Mira on August 3, 1596. But when he observed it on the 21st of that month, it was a ...

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 ...

Jupiter and Mars shine in the evening, more planets gather in the morning, and the Eta Aquariid meteors join in.

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

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 ...