Time Travel: It’s POSSIBLE!
quote:
Originally posted by Squishy:
No one can quite comprehend just how big the universe is, we’d be lucky if we managed to map our own galaxy within the next million years.
There are three views of the size of the universe (in general terms). One says the universe is infinite, anohter says that the universe is huge! really really huge but finite. The last says that its really big
and finite, but its “clsoed” or self contained, such that if you moved in a straight line in any direction you will eventually end up back where you started. (Thats teh really simplified version, but there other parts to it that suggests that whilein theory you could get back to your origin, but otehr factors, like the expansion of spacetime or a an infinite universe (from our standpoint) would make that journey uncompleteable.
Our galaxy is very nearly mapped out. Or at least that is what all the astronomy prof down here keep telling me. Years ago one problem with mapping out he galaxy is that the galactic cores brightness, keeps the light from the stars on the other side of the galaxy from reaching us. A prof down here solved that by proposing to look for the radio signals from these stars. And sicne the galactic cores radio signals can be filtered out from that of the stars, (the hubble shift isn’t so extreme for the core) this results in getting a star map of the other side of the galaxy. This has been goign on at two radiotelescopes, one in Norway(?) or maybe Sweden or Finland (those countires all seemt he same to me) and anotehr telescope somewhere in the southern hemisphere. (I can’t remembr the country)