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All 8 questions. After you submit, each question shows the right answer and why. Back to the quick check
What is an exoplanet?
Scientists have confirmed more than 6,000 planets outside our Solar System.
If a planet is in its star's habitable zone, that means it definitely has life.
In the transit method, what do astronomers actually measure?
Which technique did Mayor and Queloz use in 1995 to discover 51 Pegasi b?
An Earth-sized planet (12,700 km across) transits a star 700,000 km across. Using transit depth = (planet diameter ÷ star diameter)², what percentage of the star's light is blocked? Give two decimal places.
HD 209458 b has about 0.73 times Jupiter's mass and 1.39 times Jupiter's radius. What is its average density as a fraction of Jupiter's? (Density ∝ mass ÷ radius³.) Give two decimal places.
Explain two observational biases built into the transit and radial-velocity methods, and how they shape the known exoplanet population.
