Saturday, September 10, 2011

What is the biggest star visible to the naked eye?

Also, what is the brightest star visible to the naked eye(I don't mean brightness as seen from earth)? and


What is the most massive star visible to the naked eye?|||Largest Naked Eye Star:


VV Cephei (apparent magnitude 4.91) 1600-1900 Solar radii





Brightest star (absolute magnitude) to the naked eye:


Eta Carinae (variable, apparent magnitude flutuates and stradles the naked eye visiblilty range)





Most massive star (of naked eye visibility):


Eta Carinae (again).





If you extend the list to known stars that are below apparent magnitude of 6.00, those results will vary.|||1. Sirius


Blazing at a visual magnitude of -1.42, it is twice as bright as any other star in our sky. All stars shine but none do it like Sirius, the brightest star in the night sky.





2. R Doradus


Biggest star in the sky.


A variable star in the constellation of Dorado (the Swordfish), located in the far southern sky. R Doradus is a variable star with a period of about 338 days, changing its magnitude from approximately 4.8 at maximum (when it is visible with the unaided eye) to 6.6 at minimum (when it requires a small telescope). R Doradus is approximately 200 light years away. The measured size implies that it has a physical diameter of 370 +- 50 times that of the Sun, or well over 250 million km! If R Doradus would be placed at the centre of the Solar System, its surface would be outside of the orbit of Mars. Although even bigger stars are known - Betelgeuse for one - none appears as large in the sky because they are all at greater distances. The very large apparent size of R Doradus is due to the combination of its relative proximity and large physical size.|||Rigel.


At a distance of 1100 light years, and an


absolute magnitude -6.4


It has a brightness approximately 33,000 times


that of our sun.


Followed by the giant red star Betelgeuse.


Betelgeuse is the largest star we can see


with the naked eye.


Rigel is over 1000 times more luminous than Sirius.|||the sun. it is a star within the solar system, that is very easy to see. but I shall advise you not to look at it the light that it produces is too extreme to look at unless you wish to hurt your eyes.|||Betelgeuse is the largest star visible to the naked eye.|||The biggest sun and the brightest appart from sun sirius.

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