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Evidence ID: COS-EV02
Evidence: Hubble's Law - Red Shift Distance Law
Summary: Edwin Hubble discovered that the light from distant galaxies appeared to be redder than expected. He also discovered that the red shift increased in direct proportion to the distance the galaxies were located away from the cosmic explosion. He concluded that this red shift was due to the stretching of the light waves as the outermost galaxies move away from us. His findings proved that the universe is expanding from a singularity beginning.
Description: In 1929, the American astronomer Edwin Hubble, through tireless observations at Mt. Wilson Observatory, made a startling discovery which verified Friedman and LeMaître’s theory of an expanding universe [COS-EV03].
Hubble found that the light from distant galaxies appeared to be redder than expected. This red shift in the light was due to the stretching of the light waves as the outtermost galaxies move further away from the original cosmic explosion. Hubble further discovered that the red shift increased in direct proportion to the distance the galaxies were located away from the cosmic explosion.
Hubble's discovery was proof that the physical boundaries of space were expanding, not just that the planetary bodies in space that were simply moving further apart into an infinitely large, preexisting physical space.
Hubble's discovery became known as the Hubble's Law. Hubble's Law states that the greater the distance between any two galaxies, the greater their relative speed of separation, and thus red shift.
The Hubble's Law was further advanced in the 1990's when the Hubble Space Telescope and NASA's WMAP spacecraft were used to measure other critical factors that further conformed the Big Bang theory.
Together with the Cosmic Microwave Background Radiation (CMBR) discovery [COS-EV10], Hubble's Law represents the best available evidence for the Big Bang theory. CMBR bears witness to an enormous explosion, while Hubble's red shift bears witness to the expansion of the space boundaries in the universe.
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