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
UW Coronae Borealis orbit each other every 111 minutes, while there is another period of 112.6 minutes. The beat period of these is 5.5 days, which is thought to represent the precession of the asymmetrical accretion disk around the neutron star. UW Coronae Borealis UW Coronae Borealis, also known as MS 1603.6+2600, is a low-mass X-ray binary star system in the constellation Corona Borealis. Astronomer Simon Morris and colleagues discovered the X-ray source in 1990 and were able to match it up with a faint star with an average visual magnitude of 19.4. The system is thought to be made up of a