New findings about interstellar comet 3I/ATLAS reveal its surprising size, possible thick disk origin, and what makes it ...

Today in the history of astronomy, an eclipse isn’t the only stunning thing in the sky.

The solar system’s smallest planet comes to a standstill in the evening sky before starting its retrograde motion for the next few weeks.

At incredibly small scales, the universe operates according to the unfamiliar rules of quantum mechanics. And Planck’s ...

Newfound interstellar object 3I/ATLAS may be carrying pristine material from early in the Milky Way’s star-forming history.

Spot the Broken Engagement Ring asterism near Merak in Ursa Major, easily viewed with binoculars or a low-power telescope.

Today in the history of astronomy, a star is captured in an astrophotography first.

Astronomers have detected the most massive black hole merger ever observed, challenging stellar evolution and black hole formation theories.

Early birds can catch our satellite just 3° from two giant planets in Pisces: lovely ringed Saturn and far distant Neptune.

The center of our galaxy is visible overnight on summer evenings, just off the tip of the Sagittarius Teapot’s spout in the ...

Kluger, who has written about the Apollo Program, talks about his new book: 'Gemini: Stepping Stone to the Moon, The Untold ...

While astronomers have previously seen young discs that contain newborn, massive, Jupiter-like planets, McClure says, “we’ve always known that the first solid parts of planets, or planetesimals, must ...