A planetary system has been inferred to exist around NN Ser by several teams. All of these teams rely on the fact that Earth sits in the same plane as the NN Serpentis binary star system, so humans can see the larger red dwarf eclipse the white dwarf every 0.13 days. Astronomers are then able to use these frequent eclipses to spot a pattern of small but significant irregularities in the orbit of stars, which could be attributed to the presence and gravitational influence of circumbinary planets. for NN Serpentis, adapted from Parsons
et al. (2010) In late 2009, Qian estimated a minimum mass of 10.7
Jupiter masses and orbital period of 7.56 years for this planet, probably located at 3.29
Astronomical Units. All published planetary models have failed to predict changes in eclipse timing since 2018, suggesting that a different explanation for the eclipse timing variations may be needed. ==See also==