NASA

NASA's Chief Scientist, Dr Jim Green, talks to NEO Observation Program Manager for an episode of the Gravity Assist podcast.

NASA's Chief Scientist, Dr Jim Green, talks to solar physicist Alex Young.

This week, NASA's Jim Green is joined by Melinda Kahre, who manages the Mars Climate Modeling Center at NASA's Ames Research Center and is an expert in Martian dust storms.

NASA's Chief Scientist, Dr Jim Green, speaks to Kepler scientist Jon Jenkins about hunting exoplanets.

NASA's new Chief Scientist, Dr Jim Green, talks to Bruce Banerdt, who is the lead scientist on the latest mission to Mars: InSight.

NASA's new Chief Scientist, Dr Jim Green, speaks to Martin Still, who is the Program Manager on the TESS mission, about how its quest to discover nearby exoplanets.

NASA's Planetary Science Division Director, Jim Green, talks to solar physicist Nicky Fox about a forthcoming mission to study the Sun's corona.

NASA's Planetary Science Division Director, Jim Green, talks to author Andy Weir about his science fiction novels that take place in the near-future on the Moon and Mars.

What's the next stop for NASA's New Horizons spacecraft? Jim Green finds out as he talks to the mission's Principal Investigator, Alan Stern.

NASA's Planetary Science Division Director, Jim Green, talks to NASA Goddard's Amy Simon, who studies the outer planets Uranus and Neptune.

NASA's Planetary Science Division Director, Jim Green, talks to Linda Spilker of the Jet Propulsion Laboratory, who is the Project Scientist for the Cassini mission.

Exploring Venus with Jim Green and David Grinspoon on NASA's new planetary science podcast, Gravity Assist.

NASA's Planetary Science Division Director, Jim Green, talks to Tom Wagner of the Agency's Earth Science Division on the Gravity Assist Podcast.

NASA's Planetary Science Division Director, Jim Green, talks to planetary scientist Dr Jared Espley of NASA's Goddard Space Flight Center.

NASA's Planetary Science Division Director, Jim Green, talks to planetary geologist Sarah Noble about the Moon.

NASA's Planetary Science Division Director, Jim Green, talks to the MAVEN mission's Principal Investigator Brice Jakosky and NASA's leading Mars scientist, Michael Meyer.

This control system was extensively tested before wide-spread use began.

Sally Ride, first American woman in space, passed away July 23, 2012, at the age of 61.

Gamma-rays are the highest-energy form of light in the universe.

See NASA's most popular questions and answers about comet Elenin 2011 pass through the inner solar system.

Here are five facts about NASA's twin Voyager 1 and 2 spacecraft, which are set to leave our solar system by 2016 or so.