Watch a video replay of NASA’s exoplanet announcement

Watch a replay of NASA’s announcement that seven planets have been discovered orbiting around a nearby star. Depending on atmospheric conditions, all seven could potentially be habitable, making the system a prime target for scientists hunting for another Earth.

The briefing participants are:

· Thomas Zurbuchen, associate administrator of the Science Mission Directorate at NASA Headquarters in Washington

· Michael Gillon, astronomer at the University of Liege in Belgium

· Sean Carey, manager of NASA’s Spitzer Science Center at Caltech/IPAC, Pasadena, California

· Nikole Lewis, astronomer at the Space Telescope Science Institute in Baltimore

· Sara Seager, professor of planetary science and physics at Massachusetts Institute of Technology, Cambridge