How many times has our solar system orbited the galaxy?

The Sun orbits the galaxy in 225 to 250 million years. Assuming this has never changed significantly - which isn't certain - that would mean 4 to 4.44 orbits per billion years. Its age is estimated at 4.567 billion years, so at least 18 and perhaps 20 (20.3). read more

The Sun orbits the galaxy in 225 to 250 million years. Assuming this has never changed significantly - which isn't certain - that would mean 4 to 4.44 orbits per billion years. Its age is estimated at 4.567 billion years, so at least 18 and perhaps 20 (20.3). read more