Science topic

Exoplanets

Discover worlds orbiting other stars, how astronomers find them and what exoplanets can tell us about habitability and planetary systems.

exoplanetexoplanetsextrasolar planethabitable zone
Start here

Essential guides to Exoplanets

Begin with clear explanations of the key ideas, discoveries and questions in this subject.

Latest

Latest Exoplanets articles

Read recent ScienceInfo stories and explainers about Exoplanets.

More to explore

More about Exoplanets

Continue with more articles, discoveries and explanations from this subject.

Detecting water on extrasolar planets
Space science

Detecting water on extrasolar planets

Astronomers on April 10 announced they first found evidence of the existence of water on an outer planet of the Solar System - planet HD 209458b.