List of stars and star systems beginning with the letter "M".
| Star or star system | Arity | Makeup | Associated bodies | Locational references |
|---|---|---|---|---|
| M24 Alpha | trinary star | stellar components include two yellow stars and a white dwarf | Triskelion | coordinates -85.5, -59.1, -75.8, 11.6 light-years distant from Gamma system |
| M43 Alpha | ||||
| Maat | singular | Federation space | ||
| MAO | ||||
| Marcos system | singular | orange star | Marcos XII, Lora | Federation space |
| Marcus system | ||||
| Marrat | nebula | Klingon/Federation border, near Pharos and Starbase 13 | ||
| Mazda | ||||
| Mengen | ||||
| Menkar (Ceti Alpha) | ||||
| Merak (Beta Ursae Majoris) | multiple star | five stellar masses | Merak II | Ursa Major constellation, visible from Sol (78 light-years), near Denobula Triaxa (23 light-years) |
| Mercaniad | star system | unstable, spectral class G3 | Mercan | between Orion Arm and Sagittarius Arm, 300 light-years from Federation space |
| Merope (23 Tauri) | ||||
| Mesarthim (Gamma Arietis) | ||||
| Mestiko system | ||||
| Miaplacidas (Beta Carinae) | singular | spectral class A2IV | planetary system | Carina constellation, visible from Sol (111 light-years) |
| Mira Antliae | ||||
| Mirazh | ||||
| Mirfak (Alpha Persei) | ||||
| Mizar (Zeta Ursae Majoris) | multiple star | five stellar masses | Mizar II, Mizar IV | Ursa Major constellation, visible from Sol (78 light-years), near Denobula Triaxa (23 light-years) |
| Mondoloy | ||||
| Monac | eight stellar masses | Cardassian space | ||
| Mongo | ||||
| Mu Arae | ||||
| Mu Cassiopeiae | ||||
| Mu Leonis | ||||
| Muldor |