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NN Serpentis System

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Exoplanetary Scratchpad

[SysBP Img]

Old binary star system with two planets. The binary star consists of a white dwarf and a red dwarf star that orbit each other very closely and transit each other. Variations in transit times have confirmed that two planets, inner planet (1.6 MJ, 7.7 years) and outer planet (6.6 MJ, 15.5 years) in 1:2 resonance (?), orbit both stars. A red, white, and two colored objects all around reminds astronomers of a game of Snooker. The stars originally orbited each other every two years. After the primary star became a Red Giant, it swelled up and enveloped the Red Dwarf in its outer envelope. This friction caused the primary star to lose 75% of its mass and the stars were drawn inwards to form a tight binary. The primary star then became a white dwarf star about a million years ago. The gravity lost by this star might have destabilized any planets orbiting them. It's possible that the planets were formed after the primary star sluffed off much of its mass. An earlier planet was announced, but disproven.

NN Serpentis System Web Pages

NN Serpentis System In the News

"Snooker" Like System Found (Nov 2010)

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