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Talk:Starlight problem (view source)
Revision as of 04:09, January 31, 2012
, 04:09, January 31, 2012→gravitationally bound and unbound objects: clarify my question
::::::Good. We're clarifying much here. When it is postulated, "the universe is expanding", that ''only'' refers to space, not matter, am I reading that correct? [[User:RobSmith|Rob Smith]] 22:34, 30 January 2012 (EST)
::::::Good. We're clarifying much here. When it is postulated, "the universe is expanding", that ''only'' refers to space, not matter, am I reading that correct? [[User:RobSmith|Rob Smith]] 22:34, 30 January 2012 (EST)
:::::::Depends what you mean. Existing matter is not expanding. New matter is not appearing from nowhere. However matter is just a kind of energy, and sometimes other forms of energy can convert into matter. So the amount of matter does fluctuate a bit, but the overall energy remains constant. Weirdly, thanks to gravity being negative energy, it remains constant at a value of zero. Who said it had to make sense? --[[User:GeorgeLi|GeorgeLi]] 22:41, 30 January 2012 (EST)
:::::::Depends what you mean. Existing matter is not expanding. New matter is not appearing from nowhere. However matter is just a kind of energy, and sometimes other forms of energy can convert into matter. So the amount of matter does fluctuate a bit, but the overall energy remains constant. Weirdly, thanks to gravity being negative energy, it remains constant at a value of zero. Who said it had to make sense? --[[User:GeorgeLi|GeorgeLi]] 22:41, 30 January 2012 (EST)
::::::::That makes sense and I believe it. Let's return to unbound objects. The space expansion means distance expansion between unbound objects. Is there space and/or distance between unbound and bound objects? [[User:RobSmith|Rob Smith]] 22:57, 30 January 2012 (EST)
::::::::That makes sense and I believe it. Let's return to unbound objects. The space expansion means distance expansion between unbound objects. Is there space expansion and/or changing distances between unbound and bound objects? [[User:RobSmith|Rob Smith]] 22:57, 30 January 2012 (EST)
===Rachel & Scott discuss among themselves===
===Rachel & Scott discuss among themselves===