Il futuro a 5 Stelle

Il futuro a 5 Stelle
Il futuro con il Movimento 5 stelle é un dono del cielo

mercoledì 28 luglio 2010

barole20 ti ha inviato il video "The Biggest Stars In The Universe"

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barole20 ha condiviso con te una di video su YouTube:
Star Size Comparison: The biggest/largest known stars in the Universe.

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VY Canis Majoris (VY CMa) is a red hypergiant star located in the constellation Canis Major. With a size of 2600 solar radii, it is the largest known star and also one of the most luminous known. It is located about 1.5 kiloparsecs (4.6×1016 km) or about 4,900 light years away from Earth. Unlike most stars, which occur in either binary or multiple star systems, VY CMa is a single star (i.e. does not have any stellar companions). It is categorized as a semiregular variable and has an estimated period of 6,275,081 days, or just under 17,200 years.

Antares (α Scorpii / Alpha Scorpii) is a red supergiant star in the Milky Way galaxy and the sixteenth brightest star in the nighttime sky (sometimes listed as fifteenth brightest, if the two brighter components of the Cap... Altro
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