Abstract
THE recent measurements of planetary radiation I and planetary temperatures, especially of Mars, had their beginning in the first really successful tests at the Lick Observatory, Mt. Hamilton, California, in July 1914, when thermo-couple measurements were made on 112 celestial objects, including 105 stars, down to magnitude 6 and the planets Venus, Mars, Jupiter, and Saturn. (Bureau of Standards Sci. Paper, § 244, 1914.) The experimental procedure then employed, and the results obtained, have foreshadowed, in an unforeseen manner, practically everything that has been accomplished since then.
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COBLENTZ, W. Radiometric Measurements of Stellar and Planetary Temperatures. Nature 116, 439–441 (1925). https://doi.org/10.1038/116439a0
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DOI: https://doi.org/10.1038/116439a0