Aurora elders from watching or interpreting the messages of ancestors they believed were transmitted through an aurora. "[[Bulfinch's Mythology]]" relates that in [[Norse mythology]], the armour of the [[Valkyrie|Valkyrior]] "sheds a strange flickering light, which flashes up over the northern skies, making what Men call the 'aurora borealis', or 'Northern Lights' ". There appears to be no evidence in [[Old Norse literature]] to substantiate this assertion. The first Old Norse account of "norðrljós" is found in the Norwegian chronicle "[[Konungs Skuggsjá]]" from AD 1230. The chronicler has heard about this phenomenon from compatriots returning from [[Greenland]], and he gives three possible
S Coronae Borealis magnitude and is estimated to be . Its parallax has been measured by very-long-baseline interferometry (VLBI), yielding a result of 2.39 ± 0.17 millarcseconds, which converts to a distance of 1300 ± 100 light-years. The masses of AGB stars are poorly known and cannot be calculated from their physical properties, but they can be estimated using asteroseismology. The pulsations of S Coronae Borealis lead to a mass estimate of 1.34 times that of the Sun. S Coronae Borealis S Coronae Borealis (S CrB) is a Mira variable star in the constellation Corona Borealis. Its apparent magnitude varies between 5.8 and