Taurus I was the inhabited first planet of its star system. This was a non-Federation planet. Lieutenant Commander Ron Surma, a crewmember aboard the USS Enterprise-D, was from this planet.

In 2369, this planet was listed on the chart "USS Enterprise Personnel Database", which was displayed on a PADD used by Captain Jean-Luc Picard on aboard the Enterprise-D. (TNG: "The Chase", production art)

This planet was only mentioned in writing.