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

Question

Quizplus · Accepted Answer

The velocity of our Sun varies over time due to the gravitational pull of other celestial bodies in our solar system, mainly Jupiter. This is known as the Doppler effect and can be measured by observing the spectral lines of the Sun's light. This effect causes the Sun to exhibit a periodic variation in radial velocity, with a period of approximately 11.86 years, which corresponds to Jupiter's orbital period around the Sun. Thus, choice A is the best option. Neither Earth's gravitational pull, convection on the Sun's surface nor the sunspot cycle causes significant changes in the Sun's velocity over a 12-year period that can be observed from outside of the solar system.

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