Exoplanets
Worlds around other stars: how we find them, what they are like, and the search for life.
Exoplanets
How Astronomers Find Exoplanets: Transits, Wobbles and More
The main methods astronomers use to detect planets orbiting other stars, from transit dips and Doppler wobbles to microlensing and direct imaging.
ExoplanetsThe Habitable Zone Explained: Where Liquid Water Can Exist
What the habitable zone is, how its distance depends on starlight, and why a planet inside it is a candidate for liquid water, not a guaranteed home.
ExoplanetsTypes of Exoplanets: Hot Jupiters, Super-Earths and Beyond
A guide to the main kinds of exoplanets, from hot Jupiters and sub-Neptunes to Earth-size rocky worlds, and how size and mass sort them into classes.