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6-12

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NOVA

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Comets Bombard the Early Earth

In this video segment adapted from NOVA, learn how key ingredients for life may have been delivered throughout the solar system by comets and asteroids billions of years ago. Watch video that features real satellite imagery as well as simulations to explore a dynamic model of solar system evolution. Learn how the gravitational interactions of Jupiter and Saturn could have destabilized the early solar system, leading to a 100-million-year period, known as the Late Heavy Bombardment, in which comets and asteroids were scattered throughout the solar system and collided with other objects (including the early Earth). Impact craters visible on moons and planets may be evidence of this period.

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