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How does the planet hunting Kepler Telescope detect planets orbiting suns in other solar systems (these are known as exoplanets or extrasolar planets)? a. By measuring a change in brightness of a star as a planet passes in front of it b. By observing sunlight reflected off a planet c. By measuring the wobble a sun experiences due to the pull of the planet’s gravity d. By detecting gamma rays emitted by rocky planets

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Answer:

Given the options the correct one is option "a" -  By measuring a change in brightness of a star as a planet passes in front of it.

Explanation:

Kepler Telescope launched by NASA in 2009 uses sensors to monitor the brightness of more than 150,000 stars at the same time, in this way they can detect orbiting planets.

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