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

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

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

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

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

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 ...

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

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

Trump’s 2026 NASA budget proposal slashes science funding by 47%, putting more than 40 current and planned missions at risk.

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

The Senate appropriations committee challenges Trump’s 2026 budget, aiming to protect NASA Science and NSF from major cuts.

Whether you observe in the morning or evening, the solar system has something for you today as two worlds reach their ...