The sun radiates heat across 93 million miles of space, to warm the earth. Today Gerd Sommerhoff describes something of the behaviour of these heat rays.
For Schools
First shown in November 1961
(to 10.25)
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The sun radiates heat across 93 million miles of space, to warm the earth. Today Gerd Sommerhoff describes something of the behaviour of these heat rays.
For Schools
First shown in November 1961
(to 10.25)