N-Space

N-Space (a.ka. Normal Space) was the name given to the main universe prime universe to distinguish it from the smaller E-Space. All but a few of the Doctor's adventures have taken place in N-Space.

Properties

Co-ordinates

Unlike E-Space, which uses co-ordinates that have a negative value, relative to navigational system of the the Doctor's TARDIS, N-Space uses positive co-ordinates. The Doctor suggested, then, that N-Space was a positive universe and E-Space its negative counterpart.

This was based upon the fact that the TARDIS scanner continued to show images of N-Space even after materialising on Alzarius, which had the same co-ordinates as Gallifrey, though reversed. The Doctor suggested that, rather simplying relaying visual information, the scanner operated off the absolute value of the co-ordinates and thus could not process negative co-ordinates. The scanner system was made functional again simply by replacing its original N-Space image translator with one native to E-Space. (DW: Full Circle)

The Gateway, whose co-ordinates had a zero value (neither positive nor negative) served as a place of transit between N-Space and E-Space. (DW: Warriors' Gate)

Transit points

Aside from the via the Gateway, objects can pass from N-Space to E-Space via a CVE, as did the Doctor's TARDIS (DW: Full Circle) The Great Vampire traveled to E-Space from N-Space via means unknown, as did the Human ship, the Hydrax (DW: State of Decay).

The Hydrax presumbably passes accidentally through a CVE, like the TARDIS. We do not know if objects can pass from E-Space to N-Space, intentionally.

Notes

• Alternative timelines to the main universe of N-Space exist also, however these do not appear to have negative co-ordinates.
• Apart from a very few adventures taking place outside the normal universe, all of the adventures of the Doctor have taken place in N-Space.
• The name N-Space was also used as the designation for another dimension whose spectral inhabitants attempted to invade Earth.