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Top Ten Stars in the Universe

Sirius​
Sirius​

Sirius is highly visible in the Northern Hemisphere winter night sky because it has a high relative luminosity to other stars, and it's relatively close to Earth (8.6 light-years). If the star were placed next to Earth's sun, Sirius would outshine it more than 20 times over.

source: space.com
Arcturus​
Arcturus​

Arcturus is part of the Arcturus Stream, a group of ancient stars which move at a different angle and at a greater speed than other stars in our galaxy. The Arcturus Stream is thought to be the remnants of a dwarf galaxy that collided with the Milky Way.

Aldebaran​
Aldebaran​

Below is an ordered list of the largest stars currently known by radius. The unit of measurement used is the radius of the Sun (approximately 695,700 km; 432,288 mi). The exact order of this list is very incomplete, as great uncertainties currently remain, especially when deriving various important parameters used in calculations, such as stellar luminosity and effective temperature.

image: ourplnt.com
Rigel​
Rigel​

In science fiction, Rigel's name is on a a number of planets in the "Star Trek" universe, is mentioned in "The Hitchhiker's Guide to the Galaxy," and also features in a number of novels, computer games and comic books. Rigel before modern astronomy. Rigel's name comes from an Arabic phrase, Rijl Jauzah al Yusrāʽ.

source: space.com
Betelgeuse​
Betelgeuse​

Betelgeuse is 640 light years from Earth. It is classed as a red supergiant and is the tenth brightest star in the night sky. As part of the Orion constellation Betelgeuse can be easily found in the night sky through most of the year.

Mu Cephei​
Mu Cephei​

Mu Cephei is a red supergiant star in the constellation Cepheus. It is one of the largest and most luminous star known in the Milky Way. The distance to Mu Cephei is approximately 6000 light year.

VV Cephei​
VV Cephei​

Only a few useful supergiant stars can be occulted by the Moon, including Antares and Aldebaran. Examples of eclipsing binaries include Epsilon Aurigae, VV Cephei, HR 5171, and the red-giant binary system KIC 9246715 in the constellation of Cygnus.

VY Canis ​Majoris​
VY Canis ​Majoris​

Betelgeuse < NML Cygni < VV Cephei A < VY Canis Majoris < UY Scuti Below is an ordered list of the largest stars currently known by radius. The unit of measurement used is the radius of the Sun (approximately 695,700 km; 432,288 mi).

Pollux​
Pollux​

Pollux An orange giant star which lies around 34 light years from Earth, it is around nine times larger than the sun with twice its mass,it’s radius is 5,564,000 km. Pollux is the brightest star in the Gemini constellation.

Antares​
Antares​

Complex issues exist in determining the true radii of the largest stars, which in many cases do display significant errors. The following lists are generally based on various considerations or assumptions that include: Largest stars are usually expressed in units of the solar radius (R ☉), where 1.00 R ☉ equals 695,700 kilometres.

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