The Universe

The Martian new year arrives with the Red Planet’s vernal equinox. Explaining why requires a deep dive into celestial mechanics and Earth’s calendrical history

At dusk and dawn, the sky dances with three phases of in-between light

If you’ve ever seen faces in clouds, these heavenly entities will leave you haunted

The rising moon looks huge on the horizon, but it’s all in your head

The famous exploding star T Coronae Borealis is due to detonate any day now, but it’s running a little late

The night sky isn’t perfectly dark—instead it glows faintly, and the source isn’t exactly local

Comet C/2023 A3 (Tsuchinshan-ATLAS) could soon shine very bright in Earth’s skies

Scientists are putting a new spin on the creation of binary asteroids

Supermoons are popular in the media, but are they really so different from how our extraordinary moon ordinarily appears?

Wispy whorls on the moon’s surface are as lovely as they are strange. Scientists are starting to unravel their origins

Even Earth’s mightiest telescopes aren’t up to the task of imaging Apollo lunar landing sites. A lack of resolution is the biggest reason why

Andromeda and the Milky Way may collide, or they may safely swing past each other. Time will tell