Goddess of the morning.

In Roman mythology, Aurora was responsible for such duties as extinguishing stars at the end of night. She is known today primarily in the terms aurora australis, the southern lights and aurora borealis, the northern lights.

1. An atmospheric phenomenon consisting of bands of light caused by charged solar particles following the Earth's magnetic lines of force: An aurora is the most intense of the several luminous atmospheric lights appearing sometimes at night as streamers or bands of light that occur in the upper atmosphere over the middle and high latitudes and seen most often in the Artic and Antarctic regions.

An aurora is thought to be caused by charged particles from the sun entering the earth's magnetic field and stimulating molecules in the atmosphere.
2. When capitalized, it means the goddess of the dawn, or the first light of day: In Roman mythology, Aurora was the goddess of the dawn, however in Greek her name was Eos.

Greek: Eos (goddess)
Latin: Aurora (goddess)

Dawn of the southern wind; the southern lights: On television, Jackie enjoyed watching the aurora australis, or the luminous phenomena in the sky, which takes place around the South Pole.

The aurora australis is a pattern of differently colored lights that are sometimes seen in the night sky in the most southern parts of the world or the Southern Hemisphere.

Dawn of the northern wind, the northern lights.

An aurora, or northern dawn, that occurs in the northern regions, or the North Pole, of the earth.

1. An operator controlled gating (turning a switch or transistor on and off) to eliminate undesirable radar returns from the aurora.
2. The use of digital or electrical methods in radar to eliminate or reject the target signals from all targets that are outside certain range limits.

The auroral emissions of the Northern Hemisphere or the Southern Hemisplhere which occur at higher than normal altitudes.