Dark matter: How does it explain a star's speed? - Don Lincoln
101,288 Views
2,357 Questions Answered
TEDEd Animation
Let’s Begin…
All the stars in a spiral galaxy rotate around a center -- but to astronomers, the speed that each star travels wasn't making sense. Why didn't stars slow down toward the edges as expected? Don Lincoln explains how a mysterious force called dark matter is (possibly) the answer -- and why the search for an answer matters.
Every day physicists learn more about our universe by probing deeper and deeper into space. If you were a physicist, what questions would you want to try to answer?
Sign in to answer questionAbout TED-Ed Animations
TED-Ed Animations feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TED-Ed Animation? Nominate yourself here »
Meet The Creators
- Educator Don Lincoln
- Director Gatze Zonneveld
- Narrator Don Lincoln
