expansion

Hey, I was reading Peebles, "Principles of Physical Cosmology", 1993. On page 139, in a section talking about "Blackbody Radiation in an Expanding Universe" he says: What? No global energy conservation in general relativity? How can that be? :confused: Say it isn't so! Can anyone clear...

Okay, I apologize in advance for asking what must be a rather obvious question to everyone out there, but... Suppose that the age of the universe is 14BY and the most distant object we can see is 13B lightyears away (I picked these because they seem to be close to the actual values while still...

I have often wondered if it could be possible to make an internal expansion steam engine where the steam is created directly in the piston chamber (similar to a diesel engine). Diesel engines heat air with compression to an extent that it causes the diesel to ignite (explode). Could compression...

I was going to post this under the '...marble' thread, but I decided to start a new one. Before I begin, I should point out that I do, in fact, believe that the universe is expanding. That doesn't mean that I fully understand it, and the information I've read prompts me to have some...

http://news.yahoo.com/s/ap/20060316/ap_on_sc/cosmic_inflation for some reason, the theme tune to ST:TNG comes to mind......

Once again, the cosmos was the topic of discussion with my father (I'd say I'm blessed with my relationship with him, but I don't believe in blessings). He's still arguing that it should be possible to discover the point of origin of the universe. He says that it should be possible to use the...

After the debates between who Rush Limbaugh calls the "French-looking John Kerry" and the often rumored "chimp-like George W. Bush", Pa Yahweh said to me "thats the difference between a Democrat and Republican". I say "what? To avoid answering the tough questions?" Pa Yahweh says "Democrats...