View of land surrounding by water, taken from space.

Lecture

The Origin of Earth's Oceans

National Air and Space Museum in Washington, DC and Presented Online
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Seventy-one percent of Earth’s surface is covered in oceans, but did you ever wonder why? Explore where Earth's ocean water came from and how we know

Past Exploring Space Lectures Events

See the full archive
    A three-dimensional computer simulation of Maat Mons, a volcano on Venus, and nearby topography.
    Event

    Did Venus Ever Have Oceans?

    National Air and Space Museum in Washington, DC and Presented Online
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    Artist rendering of the surface of Mars with water vapor emerging from the surface.
    Event

    The Search for Mars' Oceans

    National Air and Space Museum in Washington, DC and Presented Online
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    A sketch of a thin silver spacecraft arriving on of Jupiter's ice-crusted moons.
    Event

    Oceans Across the Universe

    National Air and Space Museum in Washington, DC and Presented Online
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    Graphic illustration of a number of spacecraft on Mars
    Event

    Bringing Mars Samples Back to Earth

    National Air and Space Museum in Washington, DC and Presented Online
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    Graphic of a spacecraft above the surface of an asteroid.
    Event

    OSIRIS-REx: Revealing Secrets from the Dawn of our Solar System

    National Air and Space Museum in Washington, DC and Presented Online
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    Graphic showing the Stardust spacecraft with two solar panel "wings" and an open recovery capsule, nearby to Comet Wild 2. The light in the distance glows green.
    Event

    The Stardust Discovery Mission: Bringing Comet Wild-2 Samples Home to Earth

    National Air and Space Museum in Washington, DC and Presented Online
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    An astronaut wearing a white spacesuit holds a tube with a Moon rock sample in it. Another astronaut. can be seen reflected in the visor of his helmet.
    Event

    To the Moon and Back

    National Air and Space Museum in Washington, DC and Presented Online
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    Titan
    Event

    The Habitability of Worlds in the Outer Solar System 

    National Air and Space Museum in Washington, DC and Presented Online
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    Half sphere of Moon with Mars beyond it
    Event

    Exploring the Moon and Mars: Learning to Work and Live in Space 

    National Air and Space Museum in Washington, DC and Presented Online
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    Earth viewed from above with part of the ISS in the upper part of the photo.
    Event

    Life Support: What the International Space Station Teaches Us About Our Changing Earth

    National Air and Space Museum in Washington, DC and Presented Online
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    A settlement on Antarctica viewed from above
    Event

    Earth-Based Analogs In Support of Space Missions

    National Air and Space Museum in Washington, DC and Presented Online
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    Rendering of blue, cloudy planet
    Event

    Earth, Exoplanets, and Everything in Between

    Presented Online and at the National Museum of the American Indian
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