The Motherworld is an M-class planet located in the Beta Quadrant. This planet was the homeworld of the Vehrian civilisation and capital world of their empire before its downfall in the 23rd millennium BCE. The planet was occupied by a Federation expedition team in 2385. (Star Trek: Abandoned)
The planet's location within the Beta Quadrant is unspecified, however subspace contact with the nearest Federation outpost, even with booster relays, is three weeks out of real time. ("Discoveries", "Solitude") The planet orbits a G-type star at a distance of 135 million kilometres.
- Motherworld (translated from Vehrian descendant languages, true name unknown)
At the time of its abandonment, the Motherworld had one natural satellite. This has since broken up and formed, along with the debris of orbital stations, the planet's ring system. ("Lost and Found")