Wednesday, December 10, 2003
A Field Guide to the Invisible Universe
Article on Discover.com
This article lays out some of the newest ideas regarding the universe and what it's composed of. Particularly intriguing to cosmologists is that the visible or detectable universe (stars, galaxies) makes up only a tiny portion of the whole. The rest appears to be "dark matter" and "dark energy," a misterious force that acts agains gravity and causes the universe's expansion to speed up.
At some point the article mentioned that the average star in our universe rotates at 135 miles per second. That's some pretty hefty speed. I wonder if rotational speeds of such magnitude generate effects we are not familiar with. Several billions of tons moving at 200+ km/s make for some hefty kinetic energy. Does all this energy have an effect on what we observe? Could that effect be something we overlook specifically because it is right in front of our eyes? Maybe all that dark matter and dark energy is not that dark after all, just incredibly fast.
This article lays out some of the newest ideas regarding the universe and what it's composed of. Particularly intriguing to cosmologists is that the visible or detectable universe (stars, galaxies) makes up only a tiny portion of the whole. The rest appears to be "dark matter" and "dark energy," a misterious force that acts agains gravity and causes the universe's expansion to speed up.
At some point the article mentioned that the average star in our universe rotates at 135 miles per second. That's some pretty hefty speed. I wonder if rotational speeds of such magnitude generate effects we are not familiar with. Several billions of tons moving at 200+ km/s make for some hefty kinetic energy. Does all this energy have an effect on what we observe? Could that effect be something we overlook specifically because it is right in front of our eyes? Maybe all that dark matter and dark energy is not that dark after all, just incredibly fast.
