When you look carefully at the infrared spectrum of the Ear… - Carl Sagan

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When you look carefully at the infrared spectrum of the Earth, you discover the minor constituents of the air. In addition to water vapor, there’s carbon dioxide (CO2), methane (CH4), and other gases that absorb the heat that the Earth tries to radiate away to space at night. These gases warm the planet. Without them, the Earth would everywhere be below the freezing point of water. You’ve discovered this world’s greenhouse effect.

Carl Sagan

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About Carl Sagan

Carl Edward Sagan (9 November 1934 – 20 December 1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space, the Pioneer plaque and the Voyager Golden Record, universal messages that could potentially be understood by any extraterrestrial intelligence that might find them. Sagan argued the hypothesis, accepted since, that the high surface temperatures of Venus can be attributed to, and calculated using, the greenhouse effect. He testified to the US Congress in 1985 that the greenhouse effect will change the earth's climate system.

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Also Known As

Native Name: Carl Edward Sagan

Alternative Names: Sagan • Carl E. Sagan • Carl E Sagan • C. E. Sagan • C.E. Sagan • C E Sagan • C. Sagan • C Sagan • Sagan C • Sagan C. • Sagan C. E. • Sagan CE

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Additional quotes by Carl Sagan

[When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996:]

If ‘fulfilled prophecy’ is your criterion, why do you not believe in materialistic science, which has an unparalleled record of fulfilled prophecy? Consider, for example, eclipses.

The unprecedented powers that science now makes available must be accompanied by unprecedented levels of ethical focus and concern by the scientific community — as well as the most broadly based public education into the importance of science and democracy.

En lo alto de los cielos había también una metáfora de la inmortalidad.

When you look carefully at the infrared spectrum of the Earth, you discover the minor constituents of the air. In addition to water vapor, there’s ca… - Carl Sagan

About Carl Sagan

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