What exactly is the universe? how can there be a boundary to the universe?

Universe is the space which contains all planets ,stars and Galaxies .It has no boundary since it is always expanding as a result of the Big Bang .

There is a passage in the bible which gives the exact size of the universe, but I do not know where it is, and the measurements are in cubits.

The universe has a undetermined shape. The realms of the universe counter act and react with all parts of the universe in someway. Our universe is empty filled with planets, stray comets, space debris and the occasional space ship. No the other form of universe in which you think exists would only be the point of the universe where it seems nothing like the last. Alternate demensions are within our universe, very hard to explain. Some of the places there resemble earth some of the islands and continants matching from similar evolution of land vs water. The box is only a boxed in area that we could never travel out of scince we only can get so far with the technology that we have to do so. The bigger box is only how much more space we can observe through a telescope or a satalite. I know you could have told me that but your having this question and this awnser will help you build you own type of intergallactic starship. So you could travel from galaxie to galaxie. I don't mean doing drugs and imagining it either. If you don't use drugs, I appolagize. Nasa is a hard place to work towards even getting to work there there would no way to come back if you built it AND wanted to fly the dang thing. Sincerely Raccon The duke of Pearl

According to the last theory of Stephen Hopkin (British) what really exists is an infinite amount of universes, they don't have boundaries either a definite shape, the theory of parallel universes became as a result of his advanced analysis on physics, he shows that universes have some kind of indefinite form of huge waving layers which touch and even penetrate one into others, it is deductible they have size and form, but mathematically he demonstrated they don't, no limits, no shape, simultaneously many universes are dieing others are in the stage of big ban and others are in constant changes, evolution or involution, everything is an enigma out of the reaching of the humans comprehension. In synthesis many theories can be studied, but the universe is the greatest secret we probably will never decrypt. His last unfinished studies were to demonstrate that time and space don't exist. It is a madness.

The universe is infinite and unique. It is nowhere and it is everywhere. It cannot be part of anything bigger, it is everything, and its boundaries cannot be determined.

A universe is a system consistin the stars and planets. There is no boundry for the universe. It just keeps expanding after a huge explosion took place in the the universe. If I were there before that explosion I just would have touched the boundry of everything!

Universe" is a word derived from the Old French univers, which in turn comes form the Latin roots unus ("one") and versus (a form of vertere, "to turn"). Physicists' concept of the Universe is motivated[citation needed] by the attempt to describe the whole of space-time, including all matter and energy and events which occur, as a single system corresponding to a mathematical model. Theoretical and observational cosmologists vary in their usage of the term Universe to mean either this whole system or just a part of this system.[1]