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Creation Day 2: The Stretching of the Raqia
The diagram above shows Hubble's detailed analysis of a galaxy's distance compared to its redshift. The majority of galaxies appear to be moving away from our own galaxy. Hubble found that the smaller, most distant galaxy images in the above photographs had higher "redshift". Hubble plotted his collected redshift data on a graph with the distance of an observed galaxy across the bottom of the graph and the velocity of the galaxy along the side. The graph above clearly shows that plotted galaxies are rushing away from us with a speed which is directly proportion to the galaxy's distance from us known as Hubble’s Law. Hubble’s Law states that a galaxy that is twice as far away as another is moving twice as fast and a galaxy ten times as far away is moving ten times as fast, etc.
Albert Einstein was elated to hear that Hubble’s work using the redshifts of distant galaxies proved the existence of his cosmological constant. He could now apply his "Theory of General Relativity" to the concept of an expanding universe that implies that both space and time can stretch to vast dimensions from only a tiny starting point.
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