Key Ideas

Think about the following questions as you watch the video

1. 01:25 Why can’t we see planets that are orbiting other stars in the Universe?
2. 01:53 What is reflexive motion?
3. 02:45 What are exoplanets?
4. 03:48 How did Swiss astronomers Michel Mayor and Didier Queloz find a planet orbiting a sun-like star?
5. 06:08 How do we make sure that we know something is an exoplanet and not a star spot, a pulsating start, or a background star messing up the measurements related to the Doppler effect?
6. 08:56 Exoplanets orbit what kinds of stars?
7. 10:27 What are some of the things we need to know about Earth-like planets to determine whether or not they are habitable?