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wood prints space wood prints dog star wood prints alpha canis majoris wood prints sirius wood prints sirius b wood prints sirius a wood prints star wood prints binary star wood prints canis major wood prints milky way wood prints astronomy wood prints 21st century wood prints astronomical wood prints circular wood prints round wood prints

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Sirius binary star system, artwork. Sirius A (lower left, Alpha Canis Majoris), in the constellation Canis Major, is the brightest star in the night sky and only 8.6 light years from Earth. It has a very small, faint companion, Sirius B (small dot at centre right). Sirius B, only 12,000 kilometres in diameter, is a white dwarf star, the collapsed core of a star. Normally, the companion star would be obscured by the brightness of its companion, but the Hubble Space Telescope was used to locate the star (see R620/302), and to measure the gravitational redshift of its light, and hence its mass. Sirius B has a mass 98% of that of our Sun. These results were published in December 2005.

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