Image of the day 12/25/2013

    Winter White Dwarfs, Giuseppe Donatiello

    Winter White Dwarfs

    Image of the day 12/25/2013

      Winter White Dwarfs, Giuseppe Donatiello

      Winter White Dwarfs

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      Description

      From left to right in order of increasing difficulty.

      40 Eridani (also known as Omicron2 Eridani, or Keid) is a triple star system less than 16.5 light years away from Earth. It is in the constellation Eridanus. The pair 40 Eridani B/C was discovered on January 31, 1783, by William Herschel. In 1910, it was discovered that although component B was a faint star, it was white in color, in fact it was the first discovered white dwarf.

      Sirius A and a faint white dwarf companion of spectral type DA2, called Sirius B. The distance separating Sirius A from its companion varies between 8.1 and 31.5 AU.

      Procyon A and a faint white dwarf companion of spectral type DQZ named Procyon B.

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      Winter White Dwarfs, Giuseppe Donatiello

      In these collections

      POD