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Published on Jan 4, 2011
Edwin Hubble provided the experimental evidence for an expanding universe. He used doppler shift measurements of the light from distant stars to show the relationship between a star's distance and the rate at which it is receding from us.
also check www.sciencerapper.com
Intro: Edwin Hubble was an American astronomer who first noted the relationship between a stars distance and the rate at which it is receding from us. This relationship, the Hubble Constant, provides evidence that the universe is expanding, allows for theories of whether the universe will continue to expand, and suggests that our current universe must have started as a dense mass 13 billion years ago - and that it was kick started with a bang.
Hubble here but please call me Ed My discoveries outlive me in your in your head i used wake up when you go to bed through the telescope the night sky i tread train my scope on the most distant galaxies so faint so faint the bare eye cannot see yet I capture light from the star-break it apart spectral analysis is where i've made my mark see red-shifted lines in absorption spectra calculate velocity shift of stars- AH bless ya! its made possible using Einstein's laws we observe that the stare are receding PAUSE from a bit of light you know from us the stars are fading my dear old Edwin you must be crazy I'm stark raving mad for what do i see the further the star the greater the velocity the universe it seems to be expanding computers make these calculations non-demanding using a stars mass and the laws of gravity we back calculate each stars trajectories but i'm not done - i've got a bigger impact I looked back in time using current rates and mass If the universe is expanding at a given rate can we back calculate to find the date at which time all the mass was compressed 13 billion years is the date that fits best it was then that began the shot that rang round the universe - we call it the big bang.
from redshifted light get the constant hubble see the universe as an expanding bubble backward in time the bubble does shrink to a point mass that represents the brink of knowledge, perhaps what can be known we live in a most mysterious home with keen insight and vision we may see into deep space beyond human mortality of fundamental rules of physics, of dark matter of galactic cores seen with clever light patterns though I'm gone i've left with fame cosmologists will forever know my name as the old poem asks if we've got enough mass in which case a fiery crunch will come to pass or whether our low mass will pay the price and we will expand forever until we ice
outro: though future physicists will determine the fate of the bubble you will forever remember the name of Hubble