Posted by Roger Head on 19/12/2016 04:07:13:
Posted by Ajohnw on 17/12/2016 18:22:34:
… Don't expect all of the fantastic colours shown in photo's though. Only cameras can catch those as the light levels are too low for the human eye – just like the northern lights.
John
For 20 or 30 years our holidays have simply been ocean cruises for a few weeks, out and about in the South Pacific. I like it because it's a means of getting away from the world, family, grandkids, etc. My wife loves it also for the same reasons, but the last few years she keeps nudging me about how much she would love to see the northern lights. I suspect that pictures of the NL might be like pictures of colourful nebulae, gas clouds, etc i.e. beautiful by timed exposure, but perhaps less impressive to the naked eye.
What is the truth?
Roger
I used to go to Sweden to work in the early part of the year. A place called Arjeplog in Sweden. They prepare a lake there for winter testing of various aspects of vehicles on ice. In my case it was mostly artics and trailers often fully laden so they put us at the shallow end just in case.
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Initially 'till some one nearly hit a moose the trip involved a lot of driving well way from the towns. Some one said what's that in the sky. I said the northern lights so 2 cars full stopped and everybody took a look and saw exactly the same thing. No colour at all even after allowing our eyes to adapt to the dark. It was pitch black. Fluke really not even a moon. They were very active too. So I go along with what has been mentioned on the telly very very occasionally in the past – the colours are down to the camera. These days they tend to omit mentioning that.
Our eyes shift to black and white vision in low light conditions so more sensitivity is needed. Binoculars might help but would miss the scope – they go all the way across the sky and flicker about.
Neil probably knows how much any moon messes up astronomical observing. It doesn't take much light to reduce the contrast.
The so called super moon is also a bit misleading. Show it using a longer focal length or do some pp in photoshop.
A sailor once told me the that the best place to see the night sky is in the middle of an ocean. A public obesrvatory had been built not far from where he lived as it was always pretty dark. He reckoned that the middle of the sea was a lot better.
John
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