Question 7 Consider the "wobble" orbit of the Sun due to the gravitational pull of Jupiter. You already know that the orbital period of Jupiter is about 11.9 years, and find that the radius of the Sun's orbit around the common centre of mass is about 1.07 R_sun. What is the orbital velocity of the Sun? (For a planet-hunting alien outside the Solar System using the radial velocity method and observing the Sun, this would be the maximum velocity that they would measure!)

Question 7 Consider the "wobble" orbit of the Sun due to the gravitational pull of Jupiter. You already know that the orbital period of Jupiter is about 11.9 years, and find that the radius of the Sun's orbit around the common centre of mass is about 1.07 R_sun. What is the orbital velocity of the Sun? (For a planet-hunting alien outside the Solar System using the radial velocity method and observing the Sun, this would be the maximum velocity that they would measure!)