Silver Blood homeworld
The Silver Blood homeworld was a deuterium-rich Class Y planetoid located in the Vaskan sector of the Delta Quadrant. It was the homeworld of a biomimetic lifeform known as the "Silver Blood". ()

Location 
In 3189, the location of this planet was denoted on a holographic star chart of the galaxy at Federation Headquarters. ()

History 
Prior to 2374, the Silver Blood was a non-sentient liquid that coated parts of the planetoid. In that year,  approached the planetoid to mine its deuterium and replenish its energy reserves. A shuttle carrying  Tom Paris and Ensign Harry Kim landed on the surface and inadvertently made contact with the Silver Blood, imparting sentience and intelligence and causing it to duplicate them.

Following first contact, a deal was struck: in return for being allowed to refill their deuterium supply, Voyager allowed the Silver Blood to duplicate their entire crew, after which Voyager left the planetoid. ()

By the following year, the Silver Blood had duplicated Voyager itself. The crew developed an enhanced warp drive that would allow them to return to Earth in just over two years, but the drive caused the Silver Blood to lose molecular cohesion. The Silver Blood attempted to return to their homeworld, but were destroyed before reaching the planetoid. ()

Gallery 

Planetoids
Homeworlds
Unnamed planets