
How Satellites Can Detect and Protect Earth From Asteroids
Clip: 9/10/2019 | 6m 17sVideo has Closed Captions
How a space-based sentry can help detect asteroids that will pass near Earth.
Adler Planetarium astronomer Mark Hammergren explains how a space-based sentry can help detect asteroids that will pass near Earth.
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Chicago Tonight is a local public television program presented by WTTW
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How Satellites Can Detect and Protect Earth From Asteroids
Clip: 9/10/2019 | 6m 17sVideo has Closed Captions
Adler Planetarium astronomer Mark Hammergren explains how a space-based sentry can help detect asteroids that will pass near Earth.
Problems with Closed Captions? Closed Captioning Feedback
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In this Emmy Award-winning series, WTTW News tackles your questions — big and small — about life in the Chicago area. Our video animations guide you through local government, city history, public utilities and everything in between.Providing Support for PBS.org
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Why Fewer Kids are Playing High School Football in Illinois
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High school football participation in Illinois is at its lowest point in decades. (8m 48s)
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Chicago Tonight is a local public television program presented by WTTW
WTTW video streaming support provided by members and sponsors.