# Finding Exoplanets

Describe how astronomers detect planets around other stars using transit photometry (dip in starlight as a planet crosses) and radial velocity (Doppler wobble of the star), explain the habitable zone concept, and discuss what atmospheric biosignatures — such as oxygen, methane, and water vapour detected together — would suggest about a planet

Builds on: The solar system (age 11+) (soft, https://ai.page/c/the-solar-system-age-11/en.md), The Vast Scale of Space (hard, https://ai.page/c/the-vast-scale-of-space/en.md)

Concept id: finding-exoplanets. Subject: science. Licence: CC BY-SA 4.0.

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