Astronomy › Section O · Star birth and exoplanets › Topic O.4
Searching for planets beyond the solar system
A planet beside its star is like a moth beside a floodlight seen from far away. Astronomers have still found thousands of them, mostly by watching what planets do to their stars: making them wobble or blocking a sliver of their light.
In this topic
- Finding the invisible
- Stars wobble too
- The radial velocity method
- Worked example: how much does Jupiter move the Sun?
- Hot Jupiters and selection effects
- The transit method
- Worked example: transit depths
- From dips to discoveries
- Direct imaging and microlensing
- The count so far
- Common mistakes to avoid
- Key takeaways
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