Top ten rankings of the largest planets in the universe

Uy is a star, which has its own nuclear reaction and emits light and heat. I don't know if its light is as bright as Venus, the brightest planet in the universe, but it belongs to a gas planet and has no rocks, so there is no place to live.

Moreover, everything on the star will exist in the form of gas and liquid. Simply put, as long as it is a star, there can be no life. Its diameter is equivalent to 15494 flight from Beijing to new york.

Second, Canis major.

Now it seems that vy Canis may not be the largest planet in the universe, ranking first in 20 17. VY is a red Supergiant star in Canis Canis, which is 4500~4900 light years away from the Earth and has an apparent magnitude of 7.95.

Third, the Cygnus planet.

Cygnus NML is the largest known star in the universe. The radio it sends out is 65,438+0,650 times that of the sun, and it takes 6 hours and 40 minutes for the light beam to go around it. The stars twinkle because we see them through the floating atmosphere. This star is classified as a red Supergiant star.

Four. WOH G64

WOH G64 is a red Supergiant star located in the barley (Zhelun) cloud galaxy, roughly estimated to be 654.38+0.6 million light years away from the Milky Way. Its radius is about 1 540 suns. WOH G64 is at the end of planetary evolution, and has ejected one tenth of the total mass. These substances and dust are around WOH G64, with a thickness of one light year. A supernova explosion is expected to occur after 2000.

Verb (abbreviation for verb) Westeru

Is it special? Finally, there is no constellation name. Its apparent magnitude is 16.79, which is absolutely invisible to naked eyes and professional telescopes, and its absolute magnitude is -7.4. Passing through its optical path is a large number of interstellar dust clouds, and most of the light is eliminated. If there is no interstellar extinction, its brightness is enough to reach 10 and so on. Well, I still can't see it.

Sixth, Sagittarius

Apparent magnitude is 6.9~ 12.7, invisible to the naked eye, and absolute magnitude is -7.3. In particular, it often expands and contracts, so the apparent magnitude changes greatly by 7~ 1 1M, which is about 340,000 times the luminosity of the sun, not far from us, 5 150 light years. Because it often gets bigger and smaller, its surface temperature changes greatly, with an average of 2900K, but the lowest is only 2450K, making it one of the coldest planets.

Seven, Cepheus

If Bian Xiao remembers correctly, it was the predecessor of VY Canis major. Many years ago, it was the biggest and was attacked by VY. Now it is confirmed that it is still fatter than VY, but it is not the fattest! Its apparent magnitude is 4.9 1, and it is the only giant planet visible to the naked eye with an absolute magnitude of -7.2. The weight is less than 25M, 200,000 ~ 320,000 times that of the sun, the surface temperature is 3800K, and the distance is 4,900 light years.

Eight, Canis major

The most familiar big star, in any case, likes the scientific style VY dog, which is synonymous with a real superstar. Although it became the eighth, its popularity has surpassed the previous seven guys' N level! It used to be said that big stars compared Betelgeuse, but now they are all run over by big dogs.

Nine, Orion planet

Go out of Capricorn to Orion, in which Betelgeuse, the beta star of Orion, is a blue Supergiant star much bigger than arcturus. The luminosity is 55000 times that of the solar system. It is the brightest star in Orion, ranking seventh in the night sky. Betelgeuse is 863 light years away from the solar system, with a diameter of about 97.44 million kilometers, 70 times that of the sun.

Ten, Gemini beta star

Gemini's beta star is bigger than Sirius, and the third star is Beichuan. Beihe III is located in Gemini, the beta star of Gemini, about 35 light years away from the solar system. The diameter of Beihe III is 1 1553600 km, which is 8.3 times the volume of the sun. Beihe III is a K0IIIb red giant with brightness 32 times that of the sun, and its brightness ranks 17 in the night sky, making it one of the closest red giants to us.