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©1981 Harrell Graham, New York, NY. All rights reserved.
The arrow points to our star, the Sun, which is only one of 200 billion other stars in the Milky Way galaxy, pictured here.
The star closest to our Sun is 4% light years away. (A light year is the distance light travels in one year. Light moves at 186,000 miles per second.)
Our Sun is 30,000 light years from the center of the Milky Way. So the light you see coming from our galaxy's center left there 30,000 years ago.
The universe contains at least 100 billion other galaxies. Each galaxy contains at least 100 billion stars.
