Sagan

Definition

Carl Sagan was an influential astronomer, astrophysicist, and science communicator who played a significant role in popularizing science. His work included studying planetary atmospheres and being a key advocate for the search for extraterrestrial life.

5 Must Know Facts For Your Next Test

1. Carl Sagan co-founded the Planetary Society in 1980 to promote space exploration.
2. He was a principal investigator on the Mariner missions to Venus and Mars.
3. Sagan's research helped demonstrate the high surface temperatures of Venus due to a runaway greenhouse effect.
4. He contributed to the understanding of seasonal changes on Mars through his studies of Martian dust storms.
5. Sagan was a strong proponent of the SETI (Search for Extraterrestrial Intelligence) program.

Review Questions

• What organization did Carl Sagan co-found in 1980?
• How did Sagan's research contribute to our understanding of Venus' surface conditions?
• In what way did Carl Sagan's studies enhance our knowledge about Mars?

Related terms

Planetary Society: An organization co-founded by Carl Sagan aimed at advancing space exploration.

Mariner Missions: A series of NASA missions to explore Venus, Mars, and Mercury, including ones where Carl Sagan was involved.

SETI: The Search for Extraterrestrial Intelligence, a scientific effort supported by Carl Sagan to detect signals from alien civilizations.