Page 25 - Curriculum Visions Dynamic Book
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Explorer 6, with its “paddle-wheel” arrays of solar cells, was the first to take a TV picture of the Earth from space. Although it looks crude, it was an important step toward the high imagery standards that we now take for granted.
The Explorer 17 satellite weighed 18 kg. It was an 89 cm stainless steel sphere designed to measure the density, composition, pressure, and temperature of Earth’s atmosphere. It was launched on April 3, 1963.
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