Tuesday, May 6, 2008

Even scientists don't know very much

I read an interesting article in Scientific American today, and I thought I'd share the gist of it. Here's the short version:
  • In the 30's or so, astronomers figured out that the universe is expanding, meaning that all the galaxies are moving apart from each other. The other options were staying still or moving closer together.
  • In 1998, they figured out that the expansion of the universe is speeding up. This surprised everyone because regular laws of nature like gravity should mean that all the galaxies pull on each other. So that would mean that the expansion would slow down.
  • These findings were from experiments; the people who make the models to explain what we see have since tried to figure out what is going on.
  • One thing these models now say in order to get all the math to work out is that most of the universe is "dark," meaning it doesn't emit light or radiation that we can see.
  • Since no one can see it, this stuff is hard to study, but everyone thinks it is there because something has to be acting on all these galaxies to keep pushing them apart.
  • I made this little chart to show the estimates of what is out there, by the type of matter:

  • Notice that only 5% is the normal stuff, like protons, electrons, you, me, hydrogen, carbon, planets, stars, etc.
  • Another 23% reacts to gravity and can be tested by complicated experiments I don't really understand.
  • The remaining 72% of what "scientists" think is out there is a mystery - we can't see it, it doesn't seem to obey natural laws, and yet we know it has energy because it is acting on things we can see.
  • Moral of the story: We should only trust our eyes for about 5% of our perception of reality and truth, our brains/logic for another 23%, and the rest is up to us. It makes it hard for me to understand why people think science rules out God.
I'll stop now with the nerd-talk, but here's the article if you're interested:
http://www.sciam.com/article.cfm?id=dark-forces-at-work

4 comments:

Aubree said...

My brain hurts! From what I did gather though, seriously interesting facts. Impressive Kelly, not going to lie, I'm a little intimidated now!

John said...

thanks for the summary. sounds a lot like dc131:7-8...

Allison said...

wow...

Stephen & Lauren Reber said...

nice reality check--I love the perspective.