Astronomy
Techniques Used to Detect and Characterize Exoplanets
Quick fact
Most exoplanets are found not by seeing them directly, but by the subtle effects they have on their host star, like a tiny 'wobble' or a periodic dimming of starlight.
Why this is interesting
You’ve probably never seen a planet outside our Solar System, yet astronomers have found thousands of them. How can we know these distant worlds exist?