if The Universe is expanding into more space…what is that “space” and how did that get there????
surely there cant be an end to things expanding, so in theory the so called “space” that the universe is expanding into…must be expanding into something else…so what is exactly is everything expanding into????
http://www.sciam.com/print_version.cfm?articleID=0009F0CA-C523-1213-852383414B7F0147
http://universeadventure.org/
http://en.wikipedia.org/wiki/Physical_cosmology
http://www.astro.ucla.edu/~wright/cosmo_01.htm
http://map.gsfc.nasa.gov/m_uni.html
this is actually a common misconception about the big bang. the universe is not expanding into anything. the universe is four-dimensional, but a two-dimensional version may be something like the surface of a sphere, and it is this surface that is expanding. the universe seems to be finite in size, yet it has no center and no edge. nothing, not even space-time, seems to exist “outside” the universe. the big bang was the entire universe, and everywhere in the universe was once the big bang.
the earliest, and oldest, radiation we can observe is the cosmic microwave background, and we see it in every direction we look, but the universe was much smaller at that time. the universe had expanded and cooled enuf for electrons and atomic nuclei, about 74 percent hydrogen and 26 percent helium, to combine and form neutral atoms. before this time the universe was much like a heavy fog, but when atoms formed, there were no free electrons to scatter light, and the universe became transparent. today, we see this light stretched to microwave wavelengths by the expansion of space-time.
anything with a cosmological redshift of 1.7 is receding at light-speed, c. anything with a greater redshift is receding faster than c. the redshift of the cmb is 1089. the cmb seems to be at least 78 billion light-years away, but the universe is only 13.7 billion years old.
VirtualLight #6 ~ Secret of the Expanding Universe ~ Beacons of Light August 2010
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