The difference between Aurora and Aurora australis
When used as nouns, aurora means an atmospheric phenomenon created by charged particles from the sun striking the upper atmosphere, creating coloured lights in the sky. it is usually named australis or borealis based on whether it is in the southern or northern hemisphere respectively, whereas aurora australis means the aurora of the southern hemisphere.
check bellow for the other definitions of Aurora and Aurora australis
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Aurora as a noun:
An atmospheric phenomenon created by charged particles from the sun striking the upper atmosphere, creating coloured lights in the sky. It is usually named australis or borealis based on whether it is in the Southern or Northern Hemisphere respectively.
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Aurora australis as a noun:
The aurora of the southern hemisphere