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V354 Cephei

See the short video below about large stars including V354 Cephei.



Stars listed in ascending size:

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KY Cygni (Red Supergiant Star, Astronomy)

KY Cygni Facts:
  • KY Cygni is a red supergiant star (spectral class M3m).
  • It is located in the constellation Cygnus, hence it's name.
  • One of the largest stars known ~ 1,420 times the Sun's diameter.
  • One of the most luminous in the known Universe (about 300,000 times the Sun's luminosity).
  • It is approximately 5,200 light-years away from us.
See the short video below about large stars including KY Cygni.



Stars listed in ascending size:

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Mu Cephei (Star, Astronomy)

Mu Cephei Facts:
  • Mu Cephei (μ Cephei) is also known as Herschel's Garnet Star (as deep red color was noted first by William Herschel).
  • Red supergiant star - appears garnet red because of spectral class M2Ia.
  • One of the largest most luminous stars in the known Milky Way.
  • Found in the constellation Cepheus.
See the short video below about large stars including Mu Cephei.



Stars listed in ascending size:

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V509 Cassiopeiae

See the short video below about large stars including V509 Cassiopeiae.



Stars listed in ascending size:

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Antares

See the short video below about large stars including Antares.



Stars listed in ascending size:

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Eta Carinae

See the short video below about large stars including Eta Carinae.



Stars listed in ascending size:

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Aldebaran

See the short video below about large stars including Aldebaran.



Stars listed in ascending size:

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Rigel

See the short video below about large stars including Rigel.



Stars listed in ascending size:

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Arcturus

See the short video below about large stars.



Stars listed in ascending size:

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Pollux (Star)

See the short video below about large stars.



Stars listed in ascending size:


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Sirius

See the short video below about large stars.



Stars listed in ascending size:

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VY Canis Majoris (VY CMa, Astronomy) Largest Known Star

VY Canis Majoris (VY CMa) is the largest known star in the Universe.



VY Canis Majoris (VY CMa) Facts:
  • Is a single red hypergiant star (i.e. has no stellar companions).
  • The largest known star in the universe with a size of 1800 - 2100 solar radii.
  • Located in the constellation Canis Major about 4,900 light years away from Earth.
  • Has an estimated period of ~6,275,000 days (~ 17,200 years).



Stars listed in ascending size:

Image - Relative Star & Planet Sizes by Dave Jarvis (Wikipedia) (cc)


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Hydrogen Bomb

The first Hydrogen Bomb (H-Bomb) test by the British Government was performed over a Pacific Island military base. The video documentary below discusses this historic occasion.


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