The universe is a pretty big place. In fact, it's crazy big. Bigger than anything you can imangine. In fact, it's everything that exist. Or is it?
How big is the Universe?
Some people believe that the universe is infinite, with no edges. Most scientists would disagree, stating the the Universe is finite, but is growing. They think it is a sphere, much like our Earth.
Believe it or not, some scientists think that their is a Multiverse, a universe where other universes live. Weird, huh? They believe that, the only way to escape our universe is to go through wormholes. To find out more, go to the Time Travel page.
Scientists predict that the Observable Universe (the bit we can see) is 1,000,000,000,000,000,000,000,000 meters across. That may seem like alot, but it is nothing compared to a googolplex (as explained beside)!
Did you know...?
If the Universe was a googolplex meters across, (a googol is one with 100 zeros after it, and a googolplex is one with a googol zeros after it) then there would almost certainly be another copy of you!
Why never to forgot your spacesuit
Our atmosphere is a Saviour. It keeps us warm, but it also stops our blood from boiling. But how? You see, the less pressure you have, the hotter liquid becomes. Our atmosphere also applies pressure, which is also what stop our organs to swell up, expanding. Talk about multi-tasking!
If you found yourself in a place without atmosphere, such as space, then your blood would boil and your organs would swell up, all while suffocating! Yowch! But there's more. Space is very close to absolute zero (the coldest anything can get, with no heat energy) so you would freeze to death as well. So you have all learnt an important lesson...
The Big Bang
The Big Bang. Amazing. It created it all. We don't know alot about the Big Bang, and much of it is still a mystery. As there is no air in space, and sound is just vibrating air, the Big Bang didn't sound like anything. Weird huh? When the Universe was first born, it was incredibly cramped and hot. But starting growing at in incredible speed, and the stars spread out, making the Universe cooler as it did so. But how will the Universe end? Sadly, it isn't pretty. Most stars will have spluttered out, making space incredibly cold. But why can't new stars appear. Because of the Universe's massive size, matter is to scattered for gravity to pull into new star. It is called... Heat Death. How cheerful!