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tuhinshukla (November 30, 1999 at 12:00 am)
0:23:33 few farts in a million .... lol
deepwinter77 (November 30, 1999 at 12:00 am)
@holzpusher kinda weird comment who exactly is this jesus some competing scintist or something?
lovelplants (November 30, 1999 at 12:00 am)
wow.. nice lecture.. i do love astronomy indeed..
DeadInTheLivingRoom (November 30, 1999 at 12:00 am)
gaaaaaaaaaaaaaaaaaaaaaaaaaay.
maxwellsdaemon7 (November 30, 1999 at 12:00 am)
@pseudorandomly Thanks. What if the two "dots" are, say, two stars in a binary, or a nucleus and an electron in an atom. Then stretching the space between them increases the distance, and implies an increase in potential energy, do you agree?
pseudorandomly (November 30, 1999 at 12:00 am)
@maxwellsdaemon7
That's the wrong way to look at it. The galaxies are actually *sitting still* in space (modulo their own secular motions) and the space between them is stretching. Put two dots on a slightly-inflated balloon, and then blow up the balloon some more. The dots are now farther apart, but they aren't being dragged; they're sitting on the same bit of rubber as before, but the rubber between them has been stretched.
maxwellsdaemon7 (November 30, 1999 at 12:00 am)
@pseudorandomly Thanks for the insight. Does that mean that galaxies and planets and other objects get "dragged" by the expanding space, and doesn't this imply a force?
pseudorandomly (November 30, 1999 at 12:00 am)
@maxwellsdaemon7
I know I'm responding to an old question, but perhaps you'll return to read my reply. I can't think how your question got flagged as spam ...
You have to define *how* you're measuring the distance to see what's going on. A ruler doesn't expand, because the electromagnetic forces holding the ruler together are stronger than the stretching of space. Timing a beam of light doesn't expand, because time (think duration of a second) is not expanding, just space. Etc.
tousalgeriens (November 30, 1999 at 12:00 am)
good work
saultube44 (November 30, 1999 at 12:00 am)
@imontellano "your words and thoughts are useless", likewise. |
