What is the Triangulum Galaxy?

The triangular galaxy ( Messier 33 ; NGC 598 ) is a spiral galaxy located in the northern sky triangle, about 3 million light years away from the earth ^[1-2] , with many variable stars, and is the third largest in the local galaxy The galaxy is slightly smaller than the nearby Andromeda galaxy and the Milky Way, and may be constrained by the gravity of the Andromeda galaxy, but it can still be considered a large spiral galaxy in the universe.

Triangle galaxy

Scientists have found

The triangular galaxy may have been discovered by Giovanni Batista Hodierna before 1654, and he and the open star cluster

At least two techniques have been used to measure the distance of the M33. Using the method of Cepheid variable stars in 2004, the measured distance was 277 ± 130,000 light years (850 ± 40kpc).

In 2006, a group of astronomers announced the discovery of eclipsing binary stars in the triangle galaxy. After studying this group of eclipses, the size of the pair of eclipses was measured. Once you know the size and temperature, you can calculate the absolute magnitude. Once the absolute magnitude and apparent magnitude are known, the distance can be calculated. The distance calculated in this way is 310 ± 200,000 light years (940 ± 70 kiloseconds gap).

By averaging these two values, the distance is 292 ± 130,000 light years (895 ± 40 ksec gap).