The biggest star in the universe

The sun is not the biggest star in the universe. Compared to other stars, it can even be called small. But on the scale of our planet, the sun is truly huge. Its diameter is 1.39 million km, it contains 99.86% of the entire matter of the solar system, and in the star can be placed a million of the same planets as our land.

The only and unique for the residents of the Earth, the sun is just one of the billion billion stars located in our galaxy of the Milky Way, and beyond its borders in the endless universe. Some of these stars are really huge: they are clearly visible in the electromagnetic range and have a significant gravitational impact on the coming celestial bodies that we can detect them, even if they are in millions of light years from our planet. Their sizes are so great that the person is simply unable to imagine such a gigantic object, therefore they measure them not in kilometers, but in solar radius and solar mass. One solar radius is 696, 342 km, and one solar mass is approximately 2, 000, 000, 000, 000, 000, 000, 000, 000, 000 kg.

Stars, significantly distinguished among others by their mass and magnitude relate to the class of hypergigants. Among the sets recorded on the endless expanses of the universe of hypergigants, it is especially possible to highlight three of them.


The biggest star will not always be the hardest, and on the contrary, the most severe star should not be the biggest. It easily proves the star under the beautiful name R136A1. Located in a large Magellan cloud at a distance of 165, 000 light years from the ground, its mass is 265 of the solar masses, which is an absolute record at the moment, while its radius is "total" 31 solar radius. Huge stocks of fuel inside this hypergigant and extremely high density of the substance allow R136A1 to emit 10 million times more than the sun, which makes it brighter and powerful from the detected stars today. Scientists suggest that at the beginning of their life, this star could reach 320 of the solar masses, but the star substance in the atmosphere R136A1 accelerates more second space speed and overcomes the gravity of this celestial body, which generates a strong star wind, i.e. The expiration of the stellar substance into the interstellar space with a quick loss of its mass.

UY shield

The shield will not affect you with its mass, which is 10 solar, but you will be surprised by its colossal dimensions - about 1, 500 solar radius. The distance to the UY shield is 9500 light years, and on this removal it is difficult to say the exact radius of the star, but astronomers suggest that during ripples it can increase to 2000 solar radius! If such a giant was placed in the center of the solar system, he would absorb all the space, including the orbit of Jupiter with the planet itself. The volume of this hypergigant is 5 billion times the volume of the sun.

The UY shield is located at a distance of almost ten thousand light years from the solar system, but due to the fact that the star is one of the most bright among those discovered, it can be easily seen from the ground to a regular amateur telescope, and in particularly favorable conditions, the naked eye. By the way, if the UY shield was not surrounded by a large cloud of dust, then this star would be the fifth bright object in the night sky, whereas now - the eleventh.

NML Swan

The star of the NML swan is a real record holder with a radius equal to 1650 solar radius. During the ripples of the star, the radius can reach about 2, 700 solar radius! If you place this hypergigant in the center of the Solar System, then its photosphere will be out of the limits of the orbit of Jupiter, covering half the distance to Saturn.

The star of the NML swan, located in the Constellation of Swan at a distance of 5300 light years from the Earth - the biggest star, famous astronomy at the moment. However, it can be said with confidence that the further study of the cosmos will bring new discoveries and records.

This is interesting: Another cosmic record holder is the most distant galaxy EGS-ZS8-1. More in article "What is the distance to the most distant galaxy?".