Aurora auroras is that an as-yet-undetected body around the dwarf star is throwing off material, as is the case with Jupiter and its moon Io. [[Category:Space plasmas]] [[Category:Arctic geography terminology]] [[Category:Atmospheric optical phenomena]] [[Category:Earth phenomena]] [[Category:Electrical phenomena]] [[Category:Light sources]] [[Category:Plasma physics]] [[Category:Planetary science]] [[Category:Sources of electromagnetic interference]] [[Category:Articles containing video clips]] Aurora An aurora (plural: auroras or aurorae), sometimes referred to as polar lights, northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in the high-latitude regions (around the Arctic and Antarctic). Auroras are produced when the magnetosphere is sufficiently
Zeta Coronae Borealis 251 days. Zeta Coronae Borealis ζ Coronae Borealis , Latinised as Zeta Coronae Borealis, is the Bayer designation of a double star in the constellation Corona Borealis. The two components are separated by six arc-seconds and share the same Hipparcos catalogue number and Flamsteed designation. Each of the two is also a spectroscopic multiple system, with a total of five stars in the group. ζ Coronae Borealis has the Flamsteed designation 7 Coronae Borealis and the Hipparcos catalogue number HIP 76669. As a double star, the brighter component is designated A (eg. WDS J15394+3638 A) while the fainter of the