The following is a list of unnamed stars.
By planet
By system
- Bajoran system's sun
- Cardassian system's sun
- Gamelan system's sun
- Laap system's sun
- Romulus system's sun
- Trialas system's sun
By quadrant
Andromeda Galaxy
Makers' homeworld sun
This star, in the Andromeda Galaxy, was the primary for the Makers' homeworld. Sometime before 2268, this star went supernova, destroying its system. (TOS: "I, Mudd")
Unknown location
Abronian supernova star
Centuries prior to 3190, this star went supernova and destroyed the original Abronian homeworld. The only surviving Abronians were those who fled in a moon they had converted into a starship. The event was depicted in a mural within the ship. (DIS: "Choose to Live")
Lwaxana Troi star
Lwaxana Troi once had a star named after her by an astronomer from Rigel IV. (TNG: "Half a Life")
Mad planet's sun

Mad planet's sun
This star was shone over the mad planet. (TAS: "The Jihad")
Nyrian system star
According to the Nyrians (who proved to be less then honest), the Nyrian system contained a red giant star. (VOY: "Displaced")
O-type star
In 2256, the USS Discovery accidentally jumped into close proximity of this O-type star while trying to jump to Corvan II, and sustained minor damage during its escape. (DIS: "The Butcher's Knife Cares Not for the Lamb's Cry")
Unusual dead star
This dead star was encountered by the USS Enterprise while on course for Questar M-17 in 2269. It was discovered to be the source of mysterious radio emisions previously assumed to be from Questar M-17.
The object was unusual in that it had negative mass and intense hypergravity. A spectral analysis of the star revealed imploded matter, on which every reading was negative as well. Its surface appeared cratered. It also had some magnetic force. It was too far away from any G1 stars to be reached using sub-warp travel.
On stardate 5221.3, the USS Enterprise discovered the dead star while star charting. It was forced to go into orbit due to the object's hypergravity, after which the crew discovered an ancient vessel also in orbit.
A magnetic organism living inside the ancient ship returned to the Enterprise along with the away team and subsequently took control of that vessel. The Enterprise escaped, trapping the organism in Questar M-17's magnetic field. (TAS: "Beyond the Farthest Star")