Dark matter the vast majority of the gravitating

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Unformatted text preview: with distance. There need not be a 3- D center, a 3- D edge nor a 3- D outside to our 3- D Universe. Age of the Universe is about 13.8 billion years, determined from the distance to supernovae (and other things) and the velocity of recession as measured by the Doppler shift. Traditional Types of Universes – “flat,” infinite in extent, will expand forever approaching zero velocity; “open,” infinite in extent, will expand forever at a finite velocity; “closed,” finite in extent and volume, will recollapse (neglecting Dark Energy). Dark Matter – the vast majority of the gravitating material in the Universe emits no detectable radiation and is not, nor has ever been, composed of “ordinary” gravity matter as we know it composed of protons, neutr...
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