The time taken by the Sun to complete one revolution around the centre of the Milky Way galaxy is called ________.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Both (2) and (3)
The Sun, with the whole solar system, goes once around the centre of the Milky Way in about 225-250 million years. This period is called a galactic year, also known as a cosmic year. A solar year is the time the Earth takes to go once around the Sun.