As a (very) small boy I remember wondering what was the biggest possible number so I set about discovering it in the only way I knew how... by counting up to it.
(Well, there were only two channels on the TV and no internet, so if it was raining there wasn't much else to do.)
For several days I would count for a while, remember what number I got up to, do something else for a few hours then resume the count and although I think I reached several hundred, I never answered the big question.
But big numbers remain a fascination to this day and they don't get much bigger than the ones you find in space!
Don't be put off by the look of what you see below because I hope you'll find some interesting stuff in there...
REMEMBER: I think about this stuff so you don't have to.
How long does it take to travel to other star systems and galaxies?