Aurora effect is known as the aurora borealis or the northern lights. The former term was coined by Galileo in 1619, from the Roman goddess of the dawn and the Greek name for the north wind. The southern counterpart, the aurora australis or the southern lights, has features almost identical to the aurora borealis and changes simultaneously with changes in the northern auroral zone. The Aurora Australis is visible from high southern latitudes in Antarctica, Chile, Argentina, New Zealand, and Australia. A geomagnetic storm causes the auroral ovals (north and south) to expand, and bring the aurora to lower latitudes. The
Aurora explanations: that the ocean was surrounded by vast fires; that the sun flares could reach around the world to its night side; or that [[glacier]]s could store energy so that they eventually became [[Fluorescence|fluorescent]]. In the 1740s [Benjamin Franklin] theorized in his paper "Aurora Borealis, Suppositions and Conjectures towards forming an Hypothesis for its Explanation" that an aurora was caused by a concentration of electrical charge in the polar regions intensified by the snow and moisture in the air: Observations of the rhythmic movement of compass needles due to the influence of an aurora were confirmed in the Swedish city