Multiple choice

What is the period of one revolution of sun around the centre of galaxy called?

  1. Light year

  2. Cosmic year

  3. Astronomical year

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A cosmic year (also called galactic year) is the time taken for the Sun to complete one orbit around the center of the Milky Way galaxy, approximately 225-250 million Earth years. A light year is a unit of distance. An astronomical year refers to Earth's orbit around the Sun.

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