Aleph number

An Aleph number is a really big number! It's so big, no one even knows how big it is. It's said to be bigger than the number of atoms in the universe. It's also called "infinity," since it's so big, it's hard to imagine just how big it really is. Aleph numbers are usually written using the symbol "☉" and the number "0" after it. If you were to write out the Aleph number it would look like this: "☉0" Aleph numbers are used by mathematicians when they want to talk about really big numbers but don't want to try and figure out how big it actually is.