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- Mon Aug 03, 2015 5:04 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Proton Arc Over Lake Superior (2015 Aug 03)
- Replies: 12
- Views: 3714
Re: APOD: A Proton Arc Over Lake Superior (2015 Aug 03)
Are "proton arcs" actually visible to the unaided eye? I have never been able to find a answer to that question. My feeling is the visible proton arcs are not caused by proton precipitation but by regular electron precipitation. The research I have read suggests arcs caused by proton preci...