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How does Earth's shadow make it dark at night?
http://earthsky.org/space/why-its-dark-at-night
From DLESE Community Collection (DCC)
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This radio show explains why the night sky appears dark in spite of the fact that almost all of the space inside our solar system is filled with the light of the sun. The show describes how the shadow of the Earth touches the moon during a lunar eclipse and how to observe the shadow of the Earth during the evening. The clip lasts 1 minute, 34 seconds.
Intended for grade levels:
  • Middle (6-8)
  • High (9-12)
  • General public
Type of resource:
  • Audio:
    • Radio broadcast
Subject:
  • Space science
Technical requirements:
RealPlayer plug-in
Cost / Copyright:
No cost
Copyright 1996-2007 EarthSky Communications Inc. All Rights Reserved. Permission to use, copy and distribute these materials without fee is hereby granted, provided that the above copyright notice appear in all copies and the materials are not redistributed for profit.
DLESE Catalog ID: DLESE-000-000-006-342
Resource contact / Creator / Publisher:
Publisher: EarthSky Communications