A cosmic year is the length of time it takes the sun to complete one revolution around the center of the Milky Way galaxy.
A cosmic year is about 225 million earth years.
The sun is between 20 and 21 cosmic years old.
How long is a cosmic year?
A cosmic year is the length of time it takes the sun to complete one revolution around the center of the Milky Way galaxy.
A cosmic year is about 225 million earth years.
The sun is between 20 and 21 cosmic years old.