Stargazing Star gazing with light pollution

AI Thread Summary
Light pollution significantly affects stargazing, particularly in urban areas like Philadelphia and Harrisburg, where only a few stars are visible. However, a good telescope can enhance viewing capabilities, allowing for better observation of celestial bodies like the Moon, Jupiter, and Saturn despite the glare. The misconception that larger telescopes are less effective in cities is addressed in "The Urban Astronomer's Guide," highlighting that size can help compensate for light pollution. While deep sky objects are more challenging to observe, photography techniques can mitigate light pollution effects by adjusting brightness in editing software. Interestingly, temperature inversions in urban areas can sometimes lead to clearer views of planets.
Radrook
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Guess this is for those who have a clear sky overhead. As it is the glare and pollution don't let more than a few stars shine through where I'm at.
 
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Where is that? Because I'm near Philadelphia and though the light pollution is pretty bad, a decent telescope will cut through it.
 


russ_watters said:
Where is that? Because I'm near Philadelphia and though the light pollution is pretty bad, a decent telescope will cut through it.


In the Harrisburg metropolitan area. I wasn't aware that a good telescope can cut through the glare and smog. How does it do that?
 


Radrook said:
In the Harrisburg metropolitan area. I wasn't aware that a good telescope can cut through the glare and smog. How does it do that?

City viewing of the Moon, Jupiter, and Saturn is quite good. Viewing of deep sky objects is affected by light pollution, but the size of the telescope can compensate partially. There is a(n) (untrue) myth that large telescopes shouldn't be used in the city because they gather more of the light pollution than smaller scopes. This myth is addressed on page 15 of The Urban Astronomer`s Guide by Rod Mollise,

http://books.google.ca/books?id=Z0m...&resnum=3&ved=0CBAQ6AEwAg#v=onepage&q&f=false.
 


I'm 24 miles from dead-center in Philadelphia and the population density is pretty high everywhere in SE PA - you can see what I have been able to do from my website. How far are you from Harrisburg?

I don't do much visual observing, so I can't say much about how galaxies look with your eyes through a scope, but the basic principle for photography is this: Light pollution brightens the entire image, including the object you are imaging. So using Photoshop, you can simply subtract this extra brightness from the image. It isn't perfect, but you can do a surprising amount of good photography from near a city.
 


You may surprised to learn that temperature inversions over cities can provide very steady viewing for planetary targets. Some of my steadiest views of Jupiter came from my suburban back yard.
 
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