But in a five-dimensional universe ... formed some of the many black holes astronomers do observe. Breaking space news, the latest updates on rocket launches, skywatching events and more!

In addition to our own three-dimensional "brane" of space, other three-dimensional branes ... reality," Greene wrote in "The Hidden Reality." 5. Mathematical Universes Scientists have debated ...

We represent points in three dimensional space with ordered triples — our point above has coordinates (2, 3, 5). Three dimensions; three coordinates. To measure the distance between two points ...