Thinking big...feeling small

The one thing about working for a scientific magazine is that every once in a while, you see an article that just blows my mind! (Does Our Universe Live Inside a Wormhole?) Just reading the headline alone was enough to make me say WOW! When you start to think about space, it makes you realize how small you are. If you traveled at the speed of light, which is a little over 186,000 miles per second, it would take you 8 minutes to get the sun. But, it would take you 100,000 years to go from one end of the milky way to the other. That's just one galaxy. The largest galaxy known would take 5 million years to cross! Scientist believe there are more than 170 billion galaxies in the universe. Its hard to picture 170 billion of anything...It's almost impossible to grasp! To put in perspective, that's about half the number of cells in our body. Many of these galaxies have stars that would make our sun look like invisible by comparison...I think my head is starting to hurt now.