How can someone discover a real planet in the solar system?

How can someone discover a real planet in the solar system? Dr. Michael Brown of the California Institute of Technology answers the question in this special "Mysteries of the Cosmos" edition of "Ask a Scientist."

Provided by National Science Foundation

Runtime: 0:59

More Ask a Scientist videos

Get Science360's video of the day in your mailbox each weekday.

Sign up now!
» More videos about Astronomy & Astrophysics, Physics