Detecting Life on Other Planets

What was the primary goal of the Galileo experiment led by Carl Sagan in 1990?

• To detect life on Earth using space probe data

• To explore Jupiter's moons

• To capture images of the Milky Way

• To measure the distance to the nearest star

Which molecules did the Galileo spacecraft detect in Earth's atmosphere that are essential for life?

• Helium and Argon

• Nitrogen and Sulfur

• Water and Oxygen

• Carbon and Neon

Why is the presence of methane in an oxygen-rich atmosphere considered a significant indicator of life?

• Methane and oxygen naturally coexist in equilibrium

• Methane is a rare element in the universe

• Methane oxidizes quickly, so its presence suggests continuous production

• Methane is only produced by volcanic activity

What makes water an ideal substance for supporting life?

• It is abundant in the universe

• It is a solid at room temperature

• It is a powerful solvent and has a high heat capacity

• It has a low boiling point

What did the Galileo spacecraft's flyby of Earth demonstrate?

• The existence of life on Mars

• The discovery of new elements in Earth's atmosphere

• The presence of intelligent life on Jupiter

• The ability to detect life on Earth from space

How do scientists analyze the atmospheres of distant exoplanets?

• By sending probes to the planets

• By measuring the gravitational pull of the planets

• By analyzing the light of a star as it passes through a planet's atmosphere

• By observing the planets through telescopes

What is the significance of the James Webb Space Telescope in the search for extraterrestrial life?

• It will enable detailed analysis of Earth-like atmospheres

• It will measure the age of the universe

• It will allow us to travel to other planets

• It will capture images of black holes

Which exoplanet system is mentioned as a potential target for detecting life with the James Webb Space Telescope?

• Alpha Centauri

• TRAPPIST-1

• Proxima Centauri

• Kepler-22b

What is the main challenge in analyzing Earth-like atmospheres around distant planets?

• The atmospheres are too hot

• The planets are too far away

• The atmospheres are too thin and the planets too small

• The planets are moving too fast

What is the potential outcome of detecting disequilibria in alien atmospheres?

• Confirmation of intelligent life

• Evidence of non-biological processes

• Discovery of new chemical elements

• Indication of life on other planets