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mellamaet · 10-01-2010, 08:16 AM

Quote:

Originally Posted by Antarctica!

Risu nodded thoughtfully. "This radiation, which we call the cosmic microwave background, or CMB for short, is something like the afterglow of the Big Bang. After 13 billion years, it has cooled down to only a few degrees above absolute zero, but if you wind back the clock, you end up with radiation that has been on the move through the Universe since less than four hundred thousand years after the Big Bang. The Big Bang model predicted this radiation, and its discovery thoroughly vindicated the model to the point that it is now considered the best explanation of how the Universe began."

Cass stared at the professor. What did she say? Then with a sigh, she massaged her temples tiredly and stared blankly, oh dear, this is too much for her 11 year old brain...But then, a question popped into her mind, so she raised her hand and asked "Professor, you said that the big bang is sort of an explosion of some kind that formed the universe. I was just wondering, where did it start and if it has cooled down, how is it that it's still expanding?"

10-01-2010, 08:16 AM	#121 (permalink)
mellamaet DoM Jobberknoll Join Date: Jul 2010 Location: Dreamland (GMT+8) Posts: 4,039 Hogwarts RPG Name: Serena Anastasia Anders Fifth Year x2	\|\| Laura's walking popcorn \|\| Lermaniac \|\| Tazzie's Sugar \|\| Mrs. Henderson Quote: Originally Posted by Antarctica! Risu nodded thoughtfully. "This radiation, which we call the cosmic microwave background, or CMB for short, is something like the afterglow of the Big Bang. After 13 billion years, it has cooled down to only a few degrees above absolute zero, but if you wind back the clock, you end up with radiation that has been on the move through the Universe since less than four hundred thousand years after the Big Bang. The Big Bang model predicted this radiation, and its discovery thoroughly vindicated the model to the point that it is now considered the best explanation of how the Universe began." Cass stared at the professor. What did she say? Then with a sigh, she massaged her temples tiredly and stared blankly, oh dear, this is too much for her 11 year old brain...But then, a question popped into her mind, so she raised her hand and asked "Professor, you said that the big bang is sort of an explosion of some kind that formed the universe. I was just wondering, where did it start and if it has cooled down, how is it that it's still expanding?" __________________