HaitiLibre Quiz

Astronomy 2.1 WORLD

Difficulty Level: N2 Intermediate
Astronomy is the pillar of our quest for meaning, transforming our view of the world from the first navigators to modern astrophysicists. By scrutinizing the infinite, we seek to understand whether life is an earthly exception or a universal murmur. This science, through its dizzying discoveries, is shaping the technological and philosophical destiny of our entire civilization.
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What parameter mainly defines the "habitable zone" around a star for an exoplanet?

0% of players answered correctly.

THE CORRECT ANSWER: The distance allowing the existence of liquid water on the surface

The habitable zone, often called the “Goldilocks zone,” is the orbital region around a star where thermodynamic conditions theoretically allow water to remain in a liquid state on the surface of a planet. This concept is central in exobiology, because water is considered the essential solvent for the chemistry of life as we know it.This zone is not fixed: it depends on the luminosity and temperature of the star. For a red dwarf, it will be very close, while for a giant star, it will be much further away. However, being in this zone does not guarantee life; the planet's atmosphere must also exert sufficient pressure and have a balanced greenhouse effect. The study of these potential worlds is today the priority of new space telescopes to uncover traces of distant biological activity.