The universe is unbelievably big, almost impossible to imagine. The estimation of the real size of the stars and planets is still not accurately confirmed. The radius of the sun is approximately 695,500 km or 432,450 miles. Larger stars are measured in Solar Radii, the Magellanic clouds (irregular dwarf galaxies visible in the Southern Celestial Hemisphere) have the red supergiant stars, 44 of them are larger than 700 solar radii. Here, 10 Known Stars are listed by size in solar radii.
1 Solar Raddii=695,000 km = equal to Radius of the Sun
10. AH Scorpii
It is a red supergiant star in the constellation of Scorpius, the luminosity, temperature, and shrouding gases of dust estimates lead to huge differences in size.
Constellation: Scorius
Solar radii (R☉): 1,411
Temperature: 3,500
9. VY Canis Majoris
VY is one of the most luminous of its type located in the Canis Major and 3,900 light-years away from the earth, a diameter of about 1,976,640,000.
Constellation: Canis Major
Solar radii (R☉): 1,420
Solar mass (M☉): 17
Luminosity (L☉): 270,000
8. RW Cephel
RW is one of the brightest stars in the universe over half a million times brighter than the sun, located in Cepheus, the surface temperature is around 4015 K.
Constellation: Cepheus
Solar radii (R☉): 1,435
Solar mass (M☉): 40
Luminosity (L☉): 555,000
7. VV Cephel A
The VV Cephel A also known as HD 208816 is a red supergiant star located in the constellation of Cepheus, and 5,000 light-years from earth, the temperature of the surface around 3,800 to 25,000k.
Constellation: Cepheus
Solar radii (R☉): 1,475
Solar mass (M☉): 20-25
Luminosity (L☉): 200,000-320,000
6. VX Sagittarii
It is a hypergiant pulsating variable star situated over 1.5 kiloparsecs away from the sun, and the temperature from around 2,500k to 3,500k.
Constellation: Sagittarius
Solar radii (R☉): 1,520
Solar mass (M☉): 7-11
Luminosity (L☉): 340,000
5. WHO G64
A red hypergiant star is located in the southern constellation of Dorado, and 168,000 light-years away from earth and 3.65 billion times bigger than the sun.
Constellation: Dorado
Solar radii (R☉): 1,540
Solar mass (M☉): 16-22
Luminosity (L☉): 280,000
4. Westerlund 1-26
It was discovered by the astronomer Bengt Westerlund in 1961, the surface temperature is 3000 K and seems a very cool star, located 3.55k Parsec from the earth. It has not been seen to change its luminosity, unlike other stars.
Constellation: Ara
Solar radii (R☉): 1,555
Apparent magnitude: 16.79
3. PZ Cassiopeiae
The PZ Cassiopeiae is high luminous, a semi-regular variable star, and a red supergiant star estimated 7,800 light-years away from earth, the visual range is 8.75 magnitude.
Constellation: Cassiopeia
Solar radii (R☉): 1,565
Solar mass (M☉): 25
Luminosity (L☉): 240,000 – 270,000
2. NML Cygni
Sometimes considered as the largest star, here the size estimated from 1,642 to 2775 solar radius equal to 7.67 astronomical units, and 5,300 light-years from Earth, 4.5 billion times bigger than the sun.
Constellation: Cygnus
Solar radii (R☉): 1,650
Solar mass (M☉): 25-40
Luminosity (L☉): 270,000
1. UY Scuti
It is the bright supergiant Star, currently the largest known star in the universe, 2,378,704,272 km in diameter and volume 4.9 billion times largest than the sun, located approximately 9,140 light-years from Earth.
Constellation: Scutum
Solar radii (R☉): 1,708
Solar mass (M☉): 32
Luminosity (L☉): 270,000
