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Sirius A is the star that is seen from Earth and known since ancient times, it is the brightest star in the night sky.  As an A1V class star, it appears somewhat bluish in color.  The star is estimated to be over 2 times Sol’s mass and 1.68 to 1.71 its diameter.  Sirius is also much hotter with a surface temperature 9,940K, but the largest difference between the star and our sun is the luminosity, where Sirius is more than 21 times brighter.   

Sirius A is the star that is seen from Earth and known since ancient times, it is the brightest star in the night sky.  As an A1V class star, it appears somewhat bluish in color.  The star is estimated to be over 2 times Sol’s mass and 1.68 to 1.71 its diameter.  Sirius is also much hotter with a surface temperature 9,940K, but the largest difference between the star and our sun is the luminosity, where Sirius is more than 21 times brighter.   

For an [[terrestrial planet|Earth-like]] world that has liquid [[water]] on it to exist around Sirius, it would need to be around 4.6 AUs away, equivalent to the distance of [[Jupiter]] from the Sun, with an orbital period of 6.8 years.  However due to the close orbit of Sirius B, it would be difficult for a planet to form, due to the star's disruptive influence.  If such a world did manage to form however, it also may be disrupted by the mass loss of Sirius B when it became a [[white dwarf]].

For an [[terrestrial planet|Earth-like]] world that has liquid [[water]] on it to exist around Sirius, it would need to be around 4.6 AUs away, equivalent to the distance of [[Jupiter]] from the Sun, with an orbital period of 6.8 years.  However, due to the close orbit of Sirius B, it would be difficult for a planet to form, due to the star's disruptive influence.  If such a world did manage to form however, it also may be disrupted by the mass loss of Sirius B when it became a [[white dwarf]].

===Sirius B===

===Sirius B===

Nicknamed “the Pup”, Sirius B is a classified as a white dwarf DA2-5, and is more than 8,200 times as fainter then it's primary (360 times fainter then our Sun). Because the star is a white dwarf, it is extremely dense, holding 97.8% of the Sun's mass but is only 12,000&nbsp;km in diameter, slightest smaller then the Earth.<ref>http://hubblesite.org/newscenter/archive/releases/2005/36/text/</ref>  Scientists theorize the star was once one of a spectral class B stars much like [[Regulus]] before becoming a red giant and finally a white dwarf.<ref name="SiriusAB">http://solstation.com/stars/sirius2.htm</ref>

Nicknamed “the Pup”, Sirius B is a classified as a white dwarf DA2-5, and is more than 8,200 times as fainter then it's primary (360 times fainter then our Sun). Because the star is a white dwarf, it is extremely dense, holding 97.8% of the Sun's mass but is only 12,000&nbsp;km in diameter, slightest smaller than the Earth.<ref>http://hubblesite.org/newscenter/archive/releases/2005/36/text/</ref>  Scientists theorize the star was once one of a spectral class B stars much like [[Regulus]] before becoming a red giant and finally a white dwarf.<ref name="SiriusAB">http://solstation.com/stars/sirius2.htm</ref>

==Disambiguation==

==Disambiguation==