1. Skip to content
  2. Skip to main menu
  3. Skip to more DW sites
ScienceGlobal issues

How do we know other planetary systems are out there?

Cornelia Borrmann
November 22, 2024

Our solar system is just one of many in the universe. Over 4000 other exoplanetary systems have already been discovered in our galaxy alone. How do we detect them? This viewer question was sent in by Wayne K. in the US.

https://p.dw.com/p/4n2cz