Vorlon homeworld

From The Great Machine

The Vorlon homeworld is a place shrouded in mystery. Few Humans or aliens have ever been permitted to visit the planet and only two Humans have ever been recorded returning; Sebastian and Lyta Alexander; although it's possible there could be many more (Secrets of the Soul).

After the departure of the Vorlons Beyond the Rim it is assumed that the world has been abandoned, but no-one can be certain. Over a dozen ships from various races have been sent there since the Vorlons left, but were destroyed by the automatic defense systems before they even got close.

The Vorlon homeworld is off limits until we're ready, until we've earned the right to be there...in a million years. -- (Lyta, S5E18 The Fall of Centauri Prime)

Future of the Planet

It is suspected that roughly one million years in the future, the Vorlon homeworld was settled by Humans and re-dubbed "New Earth" after their former home was consumed by its host star in a nova. -- (S4E22 The Deconstruction of Falling Stars)