The Cosmic Companion

The super-Earth GJ 740 b is no place to call home.

Exoplanets with oxygen might be a sign of life — or not. Here’s a look at how worlds can build oxygen-rich atmospheres without life.

Why Explore Mars? The Red Planet has beckoned to the human race since we first looked up at the night sky.

Giant radio pulses from pulsars are odder — and even more giant than we thought. Ho ho ho.

A pair of quasar pairs in the ancient Universe give us a look at the future of our own galaxy.

The International Lunar Research Station (ILRS), being developed by Russia and China, could be humanity’s first permanent home on the Moon.

X-rays from Uranus are spotted for the first time. No, this isn’t an April Fool’s joke.

The Nancy Grace Roman Telescope — due to become one of the great planet-hunting telescopes — might find 100,000 exoplanets among the stars.

The oceans of Enceladus could be more like the oceans of Earth than we believed — but is there life?