Assertion: aurora borealis's counterpart | /r/HasProperty | formed high
Facets:
value: the outermost actual atmosphere
type: LOCATION
value: in the atmosphere in the ionosphere
type: LOCATION
Source sentences:
text: The Aurora Borealis and its southern counterpart the Aurora Australis are formed high in the atmosphere in the ionosphere, which is sometimes considered as part of the thermosphere, the outermost actual atmosphere.