How Do We Measure the Mass of an Extrasolar Planet

question 43

Multiple Choice

How do we measure the mass of an extrasolar planet?

• A) We use Newton's law of gravity, using the measured distance of the planet from its star and the planet's gravitational pull on the star.
• B) We measure the change in the brightness of a distant star that the planet causes by microlensing.
• C) We use spectra to measure the planet's temperature and photometry to measure its brightness.
• D) We measure the planet's angular diameter and hence its size and then use spectra to find its composition and hence density.

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Definitions:

Free-Choice Question

A type of question that allows the respondent to answer in an open-ended format, providing personal insights or opinions without being restricted to predefined options.

Erasmus

Desiderius Erasmus of Rotterdam, a 15th-16th-century Dutch Renaissance humanist, Catholic priest, social critic, teacher, and theologian known for his works on theology, education, and for advocating for religious tolerance.

In Praise of Folly

A satirical essay written by Desiderius Erasmus, critiquing aspects of his society with humor and ironic wit.

Dutch Philosopher

A philosopher hailing from the Netherlands, known for contributing to a wide range of philosophical discussions and theories.