Our Sun's Orbit

Our Sun's Orbit


The sun orbits around the Milky Way at a speed of about 220 km (140 miles) per second.


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Does the Sun move around the Milky Way?

Yes, the Sun - in fact, our whole solar system - orbits around the center of the Milky Way Galaxy. We are moving at an average velocity of 828,000 km/hr. But even at that high rate, it still takes us about 230 million years to make one complete orbit around the Milky Way!

The Milky Way is a spiral galaxy. We believe that it consists of a central bulge, 4 major arms, and several shorter arm segments. The Sun (and, of course, the rest of our solar system) is located near the Orion arm, between two major arms (Perseus and Sagittarius). The diameter of the Milky Way is about 100,000 light-years and the Sun is located about 28,000 light-years from the Galactic Center.


How Many Galaxies Are There?

The cosmos contains approximately 100 - 200 billion galaxies.

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Dark Energy

Humans can only see about 4% of the matter in the Universe.

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Mercury and Venus

The only two planets in our solar system that do not have moons are Mercury and Venus.

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Our Sun's Orbit

The sun orbits around the Milky Way at a speed of about 220 km (140 miles) per second.

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