O-type supergiants

Alnitak is a triple star system in the constellation of Orion. It has the designations ζ Orionis, which is Latinised to Zeta Orionis and abbreviated Zeta Ori or ζ Ori, and 50 Orionis, abbreviated 50 Ori. The system is located at a distance of several hundred parsecs from the Sun and is one of the three main stars of Orion's Belt along with Alnilam and Mintaka.

Galactic X-ray source in the constellation Cygnus that is very likely a black hole

type of star

star in the constellation of Puppis

star in the constellation Carina

star in the constellation Sagittarius

star in the constellation Camelopardalis

star

star in the constellation Monoceros

star in the constellation Cepheus

triple star system in the constellation Tucana

binary star in the constellation Carina

star in the constellation Norma

R136b is a blue supergiant star in the R136 cluster in the Large Magellanic Cloud. It is one of the most massive and most luminous stars known. It is found in the dense R136 open cluster at the centre of NGC 2070 in the Tarantula Nebula.

Beta Lyrae variable in the constellation Canis Major

variable star in the constellation Musca

star

Star in the constellation Carina

star in the constellation Dorado

star

star in the constellation Carina

star in the constellation Cepheus

star in the constellation Aquila

star in the constellation Carina

AB7, also known as SMC WR7, is a binary star in the Small Magellanic Cloud. A Wolf–Rayet star and a supergiant companion of spectral type O orbit in a period of 19.56 days. The system is surrounded by a ring-shaped nebula known as a bubble nebula.

High-mass X-ray binary

M33-013406.63, also known as B416 or UIT301, is a O-type blue evolved supergiant star in the constellation of Triangulum. It is located within the Triangulum Galaxy, which is approximately 2,380,000–3,070,000 light years away from Earth.