Which of the following methods uses the principle of orbital acceleration to detect planets around another star?
A) Measuring the change of light of a star as the planet crosses in front of it
B) Taking a picture of the planet next to the star
C) Measuring a single Doppler shift of a star, one time
D) Measuring change in the Doppler shifts of a star over the course of many nights

Question

Quizplus · Accepted Answer

Measuring the change in Doppler shifts of a star over the course of many nights uses the principle of orbital acceleration, also known as the radial velocity method. The slight wobble of the star caused by the gravitational pull of the orbiting planet leads to changes in the star's spectral lines that can be detected through Doppler shifts.

Which of the Following Methods Uses the Principle of Orbital