Stephenson 2-18
red supergiant · possibly the largest star known
19,000 light-years from Earth
If its measured size is right, its surface would reach beyond the orbit of Saturn. Its distance is uncertain by more than half, so it may be smaller, but it is certainly one of the giants of the galaxy.
- ~2,150 times the Sun's radius (20 AU across) · ~19,000 light-years
- light would take almost 3 hours to cross it
- kind
- star
- size
- 20 AU across
More stars & stellar remnants
- WR 124 Wolf-Rayet star shedding its skin
- S2 and the S-stars stars orbiting the black hole
- SGR 1806-20 magnetar
- Eta Carinae hypergiant binary inside the Homunculus Nebula
- Crab Pulsar neutron star
- UY Scuti red supergiant
- WR 140 colliding-wind binary
- RS Ophiuchi recurrent nova