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The Triangulum Galaxy is a spiral galaxy 2.73 million light-years (ly) from Earth in the constellation Triangulum. It is catalogued as Messier 33 or NGC ( New General Catalogue) 598 . With the D 25 isophotal diameter of 18.74 kiloparsecs (61,100 light-years ), the Triangulum Galaxy is the third-largest member of the Local Group of galaxies ...
Triangulum is a small constellation in the northern sky. Its name is Latin for "triangle", derived from its three brightest stars, which form a long and narrow triangle. Known to the ancient Babylonians and Greeks, Triangulum was one of the 48 constellations listed by the 2nd century astronomer Ptolemy.
The studies also suggest that M33, the Triangulum Galaxy—the third-largest and third-brightest galaxy of the Local Group—will participate in the collision event, too. Its most likely fate is to end up orbiting the merger remnant of the Milky Way and Andromeda galaxies and finally to merge with it in an even more distant future.
M33 (the Triangulum Galaxy) is a direct vision naked-eye object; limiting magnitude with 12.5 in (32 cm) reflector is 17.5 (with effort) Venus and Jupiter affect dark adaptation; 2 Typical truly dark site 7.1–7.5 21.6–21.75 the zodiacal light is distinctly yellowish and bright enough to cast shadows at dusk and dawn
in Triangulum Galaxy; formerly thought to be a Cepheid variable: M33 X-7: 01 h 33 m 34.13 s +30° 32′ 11.3″ 18.70: 3000000: O6III: in Triangulum Galaxy; High-mass X-ray binary; contains largest known stellar black hole: Var A: 01 h 32 m 32.52 s +30° 30′ 22.4″ 3000000: F8Ia: in Triangulum Galaxy; luminous blue variable; one of the most ...
M33 X-7 is a black hole binary system in the Triangulum Galaxy.The system is made up of a stellar-mass black hole and a companion star. The black hole in M33 X-7 has an estimated mass of 15.65 times that of the Sun (M ☉) (formerly the largest known stellar black hole, though this has now been superseded amongst electromagnetically-observed black holes by an increased mass estimate for Cygnus ...
NGC 604 is an H II region inside the Triangulum Galaxy. It was discovered by William Herschel on September 11, 1784. It is among the largest H II regions in the Local Group of galaxies; at the galaxy's estimated distance of 2.7 million light-years, its longest diameter is roughly 1,520 light years (~460 parsecs ), over 40 times the size of the ...
Andromeda II. Andromeda II is a dwarf spheroidal galaxy about 2.22 Mly away in the constellation Andromeda. It is part of the Local group of galaxies and is a satellite galaxy of the Andromeda Galaxy (M31) but it is also situated closely to the Triangulum Galaxy (M33), it is not quite clear if it is a satellite of the one or the other galaxy.