Universe

The Universe is known as the totality of everything that exists containing the Galaxies, planets and suns. It contains multiple dimensions and timelines. In The Forge of Creation, it is seen by Professor Paradox in the space outside of the universe, it looks like a spiral of red energy.

The Universe has many dimensions such as Ledger Domain and the Null Void as well as many alternate timelines called Crosstimes.

As noted by Paradox in The Forge of Creation, many other universes also exist, with different physics from ours.

The Map of Infinity
The Map of Infinity is a complete map of space-time extending through seventeen dimensions. Anyone who has the Map can travel anywhere, including outside the Universe and The Forge of Creation; a nebula in which the reality-warping species know as Celestialsapiens are born.

Known Galaxies

 * Milky Way Galaxy
 * Andromeda Galaxy
 * At least 3 others (Mentioned by Azmuth)

Known Dimensions

 * Null Void
 * Ledger Domain
 * Dimension 12
 * Diagon's World
 * Anur Phaetos
 * At least 100 others that have been enslaved by Diagon.

Alternate universes/timelines

 * Rex's World
 * Ben 10,000 (Alternate Timeline)
 * A world where Gwen found the Omnitrix.
 * A world where Albedo turned into Alien X and is trapped motionless for nearly a year.
 * A world where Ben didn't have to destroy the Omnitrix to defeat Vilgax.
 * Ben 10: Race Against Time