An observer outside our Solar System,who monitors the velocity of our Sun over time,will find that its velocity varies by ±12 m/s over a period of 12 years because of:
A) Jupiter's gravitational pull.
B) Earth's gravitational pull.
C) convection on the Sun's surface.
D) the sunspot cycle.

Question

Quizplus · Accepted Answer

Jupiter's gravitational pull is causing a small wobble in the Sun's motion, known as the "wobble method." This causes the Sun's velocity to vary by ±12 m/s over a period of 12 years, which can be detected by observing the Doppler shift of the Sun's light. Earth's gravitational pull is not significant enough to cause a detectable effect on the Sun's velocity. Convection on the Sun's surface and the sunspot cycle may have other effects on the Sun's behavior, but they do not cause this particular variation in velocity.

An Observer Outside Our Solar System,who Monitors the Velocity of Our