Astronomy

The Chandra X-ray Observatory is facing closure. Shutting it down would be a loss to science as a whole

Finding a perfect sphere is actually pretty difficult

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

A galaxy cluster bends light from seven background galaxies around it, letting astronomers peer into space and time

Long before it orbited Earth, the Hubble Space Telescope starred in a famous Superman comic

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

This blazingly fast star is shooting through the Milky Way with a planet in tow

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

For the first time, we are sending a spacecraft to explore an alien ocean world—a moon that might host life today

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

Claims of worlds orbiting Barnard’s star have been made before. But an advanced instrument could provide the breakthrough that finally confirms the star hosts a planetary system