PDF Edwin Hubble - A Short Biography for Kids

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The universe, once thought to be contained by the Milky Way, expanded significantly in the eyes of astronomers. Around the same time, Hubble published a standard classification system to use for the galaxies. At the time, a descriptive system existed, and two other systems were proposed soon after, but they were insufficient. Hubble's clear method of organizing the various classes focuses on three galactic types : ellipticals, spiral and barred spirals, and irregulars.

Hubble originally thought that galaxies evolved from ellipticals to spirals, but scientists now know that each galaxy's shape is determined in its early life. In studying the various galaxies, Hubble was able to determine that they did not sit stationary in space. Instead, virtually every galaxy seems to be rushing away from Earth the Andromeda Galaxy is instead rushing toward us and will collide with the Milky Way in about 5 billion years.

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Astronomers rushed to test his calculations on other galaxies, and found that some were moving as quickly as 90 million mph 40, kilometers per second in the opposite direction. According to the calculation, the universe is expanding at a constant rate, known as the Hubble constant. Over a decade before Hubble published his work, renowned scientist Albert Einstein 's theory of General Relativity called for an expanding universe.

But Einstein removed the equations because they contradicted the evidence of the day.

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After Hubble had shown the universe was, in fact, expanding, Einstein visited him at Mount Wilson, calling his decision to change the equations, "the greatest blunder of my life. Though Hubble is most well known for these major discoveries, he also made a number of other contributions to the field of astronomy, and received numerous awards. But he never received the Nobel Prize, despite his role in improving the existing understanding of the universe. During his lifetime, astronomy was considered a field of physics for the world-renowned Nobel Prize.

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Hubble labored in vain for a change that would allow astronomers such as himself to be recognized. Unfortunately, it didn't happen until , the year Hubble died. Since the Nobel Prize cannot be awarded posthumously, Hubble was ineligible. No funeral was held, and his wife, Grace, never revealed what happened to his body.

Although he had been awarded the Bruce Medal in , the Gold Medal of the Royal Astronomical Society in and the Medal of Merit for outstanding contribution to ballistics research in , Hubble, as an astronomer, was inelegible for the Nobel Prize in Physics a rule which always irked him, although it was changed just after his death. He was, however, honoured posthumously in other ways, including the naming of an asteroid and a crater on the Moon and, most famously, the orbiting Hubble Space Telescope, which was launched in and which continues to provide us with astounding pictures of deep space.

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Edwin Hubble: The man who discovered the Cosmos

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