Question

The sun is at a mean distance of about 27,000 light years from the center of the Milky Way galaxy and completes one revolution about the galactic center in about 225 million years. The linear speed of the sun is:

(a) 120 km/s
(b) 220 km/s
(c) 320 km/s
(d) 420 km/s

Answer 1

Option B is answer. The Sun's orbital speed around the center of the Milky Way galaxy is approximately 220 km/s, allowing it to complete a galactic orbit in 225 million years.

Step-by-step explanation:

The question pertains to the orbital speed of the Sun around the center of the Milky Way galaxy. Based on various astronomical observations and calculations, the orbital speed of the Sun is about 220 km/s. This speed enables the Sun to complete one revolution around the galactic center in approximately 225 million years.

This orbital speed is a result of the balance between the gravitational force exerted by the mass of the galaxy and the inertial force due to the Sun's motion through space. Given the provided options and the information, the correct answer is (b) 220 km/s.