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Edwin Hubble Facts: Lesson for Kids

Instructor: Rebecca Gillaspy

Dr. Gillaspy has taught health science at University of Phoenix and Ashford University and has a degree from Palmer College of Chiropractic.

Edwin Hubble was a famous American astronomer who lived from 1889 to 1953. He made important discoveries that revolutionized the way we look at the universe. Learn about the life and discoveries of Edwin Hubble.

Who Was Edwin Hubble?

Do you ever look up into the night sky and wonder if there are other people just like you out there somewhere? While we have yet to prove the existence of life in outer space, we do know that other galaxies exist beyond our own, thanks to the discoveries of a man named Edwin Hubble.

Edwin Hubble was an American astronomer.
Hubble

Edwin Hubble was an American scientist who was born in 1889. He was a very good athlete, and he was also a gifted scientist.

The Milky Way is Not The Only Galaxy

Hubble started his professional career in the early 1900s, which was an exciting time for astronomy, the branch of science that studies objects in space.

The Mount Wilson Observatory in California had just been built, and Hubble was given the opportunity to work there. The observatory contained the 100-inch Hooker telescope, which at the time was the biggest telescope in the world. This job was a great opportunity to study the Milky Way, which is the galaxy that contains our planet.

Earth is part of the Milky Way galaxy.
Hubble

Like most scientists of his day, Hubble thought that the Milky Way was the only galaxy that existed, but while Hubble was looking at a hazy patch in the sky, he noticed something strange. Certain stars in the patch were too far away to be part of the Milky Way. Hubble had found an entirely different galaxy outside of the Milky Way.

The discovery of another galaxy was exciting, but Edwin Hubble didn't stop after finding the first one. He continued to study the sky and found many more galaxies. His research was so good that it changed the way people understood the universe. Instead of just one galaxy, most astronomers now believed that there were millions of galaxies beyond the Milky Way.

The Universe is Expanding

Hubble then started to measure the distance between galaxies. He determined that the farther apart galaxies were from one another, the faster they were moving apart. Hubble had made another important discovery; the universe was expanding.

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