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Van Maanen’s Star and Sirius B

By Emily Small. Sirius A and B . Van Maanen’s Star and Sirius B. White Dwarfs (Degenerate Stars). Burned up all of their gasses No source of energy generation Cool for the rest of eternity Extremely dense Very high temperatures

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Van Maanen’s Star and Sirius B

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  1. By Emily Small Sirius A and B  Van Maanen’s Star and Sirius B

  2. White Dwarfs (Degenerate Stars) • Burned up all of their gasses • No source of energy generation • Cool for the rest of eternity • Extremely dense • Very high temperatures • Cool and turn into a red dwarf and eventually a black dwarf • Thought that every white dwarf that ever existed is still visible in one way • Many are companion stars

  3. Van Maanen’s Star (Van Maanen 2) • Closest white dwarf that is not a companion star • Discovered by Adriaan Van Maanen in 1917 • Studying photos of Pisces the fish between 1914 and 1917 • Second white dwarf to be discovered • 26th closest star to our solar system • 14.1 light years away Van Maanen is the guy on the left

  4. Van Maanen’s Star Facts • Approximately .7 solar masses • One of the smallest stars known • Approximately 7,800 miles diameter. • Estimated average density of 1.2 tons/cubic cm • Can only be seen through a telescope • Visual magnitude of 12.38 • Is approximately 6000 degrees Kelvin • Has a density of 1.2 tons/centimeters cubed Van Maanen’s Star

  5. Sirius B (the Pup) • First white dwarf to be discovered • Travels in an elliptical orbit around Sirius A every 50 years • Has a magnitude of 8.44 • Is approximately 92% the size of Earth • Has approximately the same mass as the Sun • Average density of 1.7 metric tons per cubic centimeter • Approximately 19.8 au from Sirius A • Average temperature of 24800 degrees Kelvin • First photographed by scientists in the 1970’s Size of Sirius B compared to Earth

  6. Sirius B and Mythology • Not known to the western world until the mid 1800’s • Dogon tribe in Mali, Africa supposedly knew of its existence approximately 5000 years ago • Aliens called Nommos came to visit Earth and told of existence • Nommos also told of Sirius C, not known to the western world until 1995 • Dogons have artifacts of the Sirius star system dating before they were known to the western world. • Nommos told the Dogon things about our solar system that were unknown to the western world until Galileo made his telescope • Nommos also appear in myths of other ancient cultures • Egyptian goddes Isis, who is sometimes portrayed as a mermaid, is sometimes linked to Sirius The Nommos were supposed to look like Mermen. http://www.livevideo.com/video/UKUFO/42F8AF4AC9E146EEB23150DF7C7121DD/nasa-tether-incident-the-dogon-tribe-africa-.aspx

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