Week 7, clip 13

Timepoint:  09:46.5

1) Where does mass in galaxy clusters come from?  Select the option below that lists the contributions of mass fraction in a galaxy cluster, in order from largest to smallest.

- Stars > dark matter > hot gas
- Hot gas > stars > dark matter
- Dark matter > stars > hot gas
- Dark matter > hot gas > stars

Answers:
1) Dark matter > hot gas > stars