They aid in helping you to see things.
yes
There are no northern lights in Antarctica. However, the southern lights -- Aurora Australis -- are visible from the continent.
Neon lights.
Your friend probably has auroraphobia. This is the official phobia of the Northern Lights.
Yes they are visible in Alaska.
Fredericksberg
radiation
The Photosphere
The Northern lights were visible for a short time in Maryland in October of 2001 due to a solar flare. The Northern lights are most visible the further north one goes. Video is available for a vantage view.
They are always 'out', they are just not visible because of the the sun or other lights.
Only in the 'visible light' spectrum.
The other vessel is coming directly toward the observer, so both the port and starboard running lights are visible.