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How Fast Are You Moving When You Are Sitting Still? - NASA

Universe in the Classroom No. 71 Spring 2007 Page 1No. 71 Spring 2007 2007, Astronomical Society of the Pacific 390 Ashton Avenue, San Francisco, CA 94112 How Fast Are You Moving When You Are Sitting Still? by Andrew Fraknoi Foothill College & the Astronomical Society of the PacificWhen, after a long day of running around, you finally find the time to relax in your favorite armchair, nothing seems easier than just Sitting still. But have you ever considered how fast you are really Moving when it seems you are not Moving at all?Daily MotionWhen we are on a smoothly riding train, we sometimes get the illusion that the train is standing still and the trees or buildings are Moving backwards. In the same way, because we ride with the spinning Earth, it appears to us that the Sun and the stars are the ones doing the Moving as day and night alternate.

these gamma-rays as the “flash” of the Big Bang—just like fireworks or a bomb can produce a flash of light, the Big Bang resulted in a flash of gamma rays. But these gamma rays were everywhere in the universe. They filled all of space, and as the universe grew (expanded), the gamma rays expanded with it.

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nightsky.jpl.nasa.gov

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nightsky.jpl.nasa.gov

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nightsky.jpl.nasa.gov

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three.jsc.nasa.gov

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