But is it a planet or what?

Snaiad's strange creatures and ecosystems continue to evolve in one of speculative biology's most convincing alien worlds.

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

The winds on seven hellish alien worlds are moving in the wrong direction. That strange anomaly just cracked open one of exoplanet science's biggest mysteries.

Alien worlds become the focus of this cinematic journey across the Milky Way, using the imaginary ship NAVIS III to explore some of the strangest planets and systems humans have discovered. The voyage ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. The Milky Way galaxy has more than 400 billion stars in it. Over the last few decades, ...

Using the Keck Observatory, astronomers measured the spins of dozens of giant planets and brown dwarfs orbiting distant stars ...

For the first time, astronomers have distinguished between the morning and evening atmospheres of a single planet, revealing ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. An artist's impression of a theoretical planet orbiting a redder star, which could cause ...

Planets orbiting stars beyond the solar system come in all shapes and sizes but mostly fit into a few categories: large and hot gas giants, super-Earths that are slightly larger than our planet, ...

With the release of Disclosure Day, Steven Spielberg’s new film about aliens, a question as old as science fiction itself ...