Extraterrestrial Life quiz
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What does the letter I in SETI stand for?
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More questions about Extraterrestrial Life
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Why did finding amino acids on meteorites excite astrobiologists?
Answer: Building blocks of life
Why: The Murchison meteorite fell in Australia in 1969, and its amino acids came in both mirror forms, ruling out earthly contamination.
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What term describes a planet found outside our solar system?
Answer: Exoplanet
Why: The first confirmed ones turned up in 1992 around a pulsar, betrayed by tiny shifts in the timing of its radio pulses.
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Which science fiction novel inspired the Dyson sphere?
Answer: Star Maker
Why: Dyson thought it should be called a Stapledon sphere, and warned that a solid shell is impossible: he meant a swarm of orbiting collectors.
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Which icy moon of Jupiter is considered a prime target for finding extraterrestrial life?
Answer: Europa
Why: Europa's global subsurface ocean is estimated to hold twice as much liquid water as all of Earth's oceans combined.
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Why would advanced aliens intentionally avoid contact according to the Zoo Hypothesis?
Answer: Observing without interference
Why: John Ball proposed it in 1973, and its weakness is that no observation could ever disprove it.
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Which exoplanet orbits the star closest to our sun?
Answer: Proxima Centauri b
Why: Announced in 2016, it laps its star every 11 days from about a twentieth of the Earth to sun distance, 4.2 light years away.
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