In Searches for Planets Orbiting Stars Other Than the Sun

question 68

Multiple Choice

In searches for planets orbiting stars other than the Sun, what is the astrometric method?

• A) searching for tiny "bumps" on images of a star, due to the light from a planet located close to the star
• B) searching for tiny displacements of the infrared image of a star compared with its optical image, caused by the presence of planets that are cool and emit primarily in the infrared
• C) searching for tiny wobbles in the position of a star, due to the gravitational pull of a planet orbiting around it
• D) searching for tiny wobbles in the positions of absorption lines in a star's spectrum, caused by radial velocity variations of the star as the result of a planet orbiting around it

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A set of interacting or interdependent components forming an integrated whole to serve a common purpose.

Average Number

The sum of values divided by the count of values, used to find the central or typical value in a set of numbers.