39 episodes

Dr. Jim Green, NASA's director of planetary science, takes you on a guided tour of the solar system and beyond.

Gravity Assist NASA

    • Science

Dr. Jim Green, NASA's director of planetary science, takes you on a guided tour of the solar system and beyond.

    Gravity Assist: Astronauts Go Back to Moon School, with Kelsey Young

    Gravity Assist: Astronauts Go Back to Moon School, with Kelsey Young

    Besides learning how to live in space, astronauts training for Artemis missions to the Moon will need to become experts in geology, so they know what to look for when they're scoping out rocks and other features. Kelsey Young of NASA's Goddard Space Flight Center describes her experience of teaching astronauts through analog sites, places on Earth

    Gravity Assist: The Moon's Holy GRAIL, with Maria Zuber

    Gravity Assist: The Moon's Holy GRAIL, with Maria Zuber

    Recent maps of the Moon's gravity have taught us a lot about its overall shape, and have been invaluable for lunar exploration. Maria Zuber, principal investigator of the Gravity Recovery and Interior Laboratory (GRAIL) mission, reflects on the twin spacecraft and their implications for future investigations.

    Gravity Assist: The Moon Quakes! With Walter Kiefer

    Gravity Assist: The Moon Quakes! With Walter Kiefer

    Just like earthquakes help scientists figure out what's going on inside our home planet, moonquakes have taught scientists a lot about the interior of the Moon.

    Gravity Assist: Fire Fountains on the Moon, with Dave Draper

    Gravity Assist: Fire Fountains on the Moon, with Dave Draper

    Early in its history, the Moon was molten, with “fire fountains” erupting from its surface. How did the Moon cool down and become the quiet, cratered world we know today? NASA’s Chief Scientist Jim Green chats with NASA’s Deputy Chief Scientist Dave Draper about the Moon’s volcanic past and what we have learned from Apollo lunar samples.

    Gravity Assist: When the Moon Was Like a Magnet, with Sonia Tikoo

    Gravity Assist: When the Moon Was Like a Magnet, with Sonia Tikoo

    From lunar samples brought back in the Apollo program, scientists have figured out that the Moon once had a shield around it called a magnetosphere, just like the Earth has today. As NASA prepares to send humans to the Moon, and eventually on to Mars, scientists are exploring the Moon's magnetic past.

    Gravity Assist Podcast: Beyond Apollo with Planetary Geologist Jake Bleacher

    Gravity Assist Podcast: Beyond Apollo with Planetary Geologist Jake Bleacher

    It's been 50 years since humans walked on the moon. Now NASA is planning to return, this time to stay. What will future lunar missions look like? Why do we go back at all?

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