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What Is The Major Supporting Evidence For The Big Bang Theory

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The night skies present a calm and unchanging universe; however, the universe is constantly expanding and this is seen as one of the major supporting evidence for the Big Bang theory. In 1912, Vesto Slipher calculated the speed and direction of “spiral nebulae”, also known as a spiral galaxy, by measuring the change in the wavelengths of light coming from them. He realized that most of them were moving away from us. A century ago astronomers thought these vast collections of stars might actually be within the Milky Way. In 1929, Edwin Hubble figured out that these galaxies are outside the Milky Way. He observed a special type of variable star that has a direct relationship between its energy output and the time it takes to pulse in brightness. By finding these variable stars in …show more content…

The Universe must have been born in this single violent event which came to be known as the "Big Bang." Thus, Edwin Hubble’s theory proposed a reality to the Big Bang theory. Furthermore, the theory is supported by the red shift. Red shift is a way astronomers use to tell the distance of any object that is very far away in the universe. When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer; clearly showing the red shift. Red shift supports the Big Bang theory because the light from distant galaxies is red shifted, suggesting that galaxies are moving away from us. This connects with Hubble’s theory of galaxies moving away and that there must have been a time when the universe was at a single point and exploded for the galaxies to expand. However, the Steady State wasn’t able to provide an explanation for the expanding universe. Before Hubble’s discovery, the universe was said to be static (the distribution of the galaxies would be the

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Did you know that Annie Cannon was able to classify around a thousand stars a day during the peak of her career? This paper will be focusing on the life, career, and legacy of Annie Jump Cannon. Annie Jump Cannon was hired by Edward Pickering, and she worked as “Pickering’s assistant at the Harvard College Observatory” (1). After that, she was credited with coming up with an easy system that divided the stars into seven spectral classes. The spectral classes were as follows: O, B, A, F, G, K, M. Annie Jump Cannon’s career ended after forty years, but her work paved the way for women in the scientific community and continues to inspire fellow female scientists.

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1558 Words | 7 Pages

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