Making The Best of Light Polluted Skys

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In summary, the person is looking for ways to view astronomical objects in a heavily light polluted area with only 20x80 binoculars and is wondering if they will be able to see anything with a telescope. They are advised to try viewing from a darker location, but not to expect much improvement with a telescope due to light pollution.
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Stratosphere
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I live in a very light polluted part of the country (NE) and I am unable to see any stars near the horizon but a lot of stars actual show up at around zenith, are there any ways for me to get good looks at things that are from 4-6.5 magnitude with only 20x80 binoculars? I am saving up for a telescope which i hope to buy in the next few months but will i even be able to see anything with such bad light pollution?
 
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  • #2
Stratosphere said:
I live in a very light polluted part of the country (NE) and I am unable to see any stars near the horizon but a lot of stars actual show up at around zenith, are there any ways for me to get good looks at things that are from 4-6.5 magnitude with only 20x80 binoculars? I am saving up for a telescope which i hope to buy in the next few months but will i even be able to see anything with such bad light pollution?

By "good looks at things from 4-6.5 magnitude" I assume you mean galaxies, nebulae, and the like (because stars are easily visible at these magnitudes through your binoculars). I regret to inform you that if your skies are as light polluted as you say, the most you will probably be able to see is the Orion Nebula, and probably the central part of the Andromeda Galaxy (This will look nothing like a galaxy. Fair warning).

If you're only limited by binoculars, if you have a car it could be worth it to take a drive out to the country to get better looks at some astronomical objects. You can see the light pollution situation at:
http://www.cleardarksky.com/csk/

Which also gives a relatively accurate assessment of seeing, humidity, and other conditions.
Try, as much as possible, to observe from a location where there are no local lights (shining in your eyes, or even near you). After 10-20 minutes in such conditions your eyes will start to see many more stars despite no change in the overall light pollution.
Other things you might try viewing include open star clusters (particularly, start with the pleaides), and it doesn't hurt to try a globular cluster either (but don't expect much).

There's not much you can do about the pollution with binocs except get to a locally dark site or travel out the the country.

Also, do not expect markedly different results with a telescope from what you achieve with binoculars. In heavily light polluted skies, the amount of skyglow increases with the size of your lens, so the effect almost cancels out the increased light from the source. Basically, size doesn't matter much for faint of objects you can see. (This isn't strictly true but it's a good approximation which appears to hold true from my experiences) So, with a telescope expect to be able to see what you already can see with the binoculars, but with greater resolution (planets will appear much crisper, you may be able to see more detail in the Orion nebula), but again, don't hold out for markedly better images from a telescope.

Sorry if this all sounds a little grim, but I have been the victim of horrible light pollution as well and am quite bitter about it!
 
  • #3
Nabeshin said:
By "good looks at things from 4-6.5 magnitude" I assume you mean galaxies, nebulae, and the like (because stars are easily visible at these magnitudes through your binoculars). I regret to inform you that if your skies are as light polluted as you say, the most you will probably be able to see is the Orion Nebula, and probably the central part of the Andromeda Galaxy (This will look nothing like a galaxy. Fair warning).

If you're only limited by binoculars, if you have a car it could be worth it to take a drive out to the country to get better looks at some astronomical objects. You can see the light pollution situation at:
http://www.cleardarksky.com/csk/

Which also gives a relatively accurate assessment of seeing, humidity, and other conditions.
Try, as much as possible, to observe from a location where there are no local lights (shining in your eyes, or even near you). After 10-20 minutes in such conditions your eyes will start to see many more stars despite no change in the overall light pollution.
Other things you might try viewing include open star clusters (particularly, start with the pleaides), and it doesn't hurt to try a globular cluster either (but don't expect much).

There's not much you can do about the pollution with binocs except get to a locally dark site or travel out the the country.

Also, do not expect markedly different results with a telescope from what you achieve with binoculars. In heavily light polluted skies, the amount of skyglow increases with the size of your lens, so the effect almost cancels out the increased light from the source. Basically, size doesn't matter much for faint of objects you can see. (This isn't strictly true but it's a good approximation which appears to hold true from my experiences) So, with a telescope expect to be able to see what you already can see with the binoculars, but with greater resolution (planets will appear much crisper, you may be able to see more detail in the Orion nebula), but again, don't hold out for markedly better images from a telescope.

Sorry if this all sounds a little grim, but I have been the victim of horrible light pollution as well and am quite bitter about it!
I have already viewed Pleiades which was not great because around this time of year Pleiades is only visible low in the sky so I was only able to see the 7 main stars in it. I would have tried to view the andromeda galaxy but I can’t find it around this time of year. How would Saturn appear through 20x80 binoculars? I would assume that Saturn would still be quit bright if I was looking for it around 1 AM since light pollution drops off a bit after mid night.
 
  • #4
Stratosphere said:
I have already viewed Pleiades which was not great because around this time of year Pleiades is only visible low in the sky so I was only able to see the 7 main stars in it. I would have tried to view the andromeda galaxy but I can’t find it around this time of year. How would Saturn appear through 20x80 binoculars? I would assume that Saturn would still be quit bright if I was looking for it around 1 AM since light pollution drops off a bit after mid night.

Your viewing of the planets won't really be diminished at all by light pollution, which is the good news. Saturn will appear as a small disk in your 20x80s, and you should be able to make out some of the rings if you have the binoculars steady, although the rings are seen nearly edge on right now. Probably you'll also be able to see a moon or two. Jupiter, when it's in the sky, will look nice too, and again, if you have steady binoculars you should be able to make out some detail in the cloud structure and the four gallilean moons.

The good news is, these objects appear much more spectacular in a good (even decent) telescope, because you get to make use of the increased aperture to magnify. The bad news is that planets are about the most impressive thing you can view from a heavily light polluted sky.

It might be a little late to catch M42, because if memory serves it sets not too long (few hours) after sundown, but it might be worth trying to glimpse.
 

1. How does light pollution affect our view of the night sky?

Light pollution refers to the excessive and unnecessary artificial light that is emitted into the night sky. This can make it difficult to see stars, planets, and other celestial objects, as well as impacting the natural behaviors of nocturnal animals and disrupting ecosystems.

2. Can light pollution be reduced or eliminated?

Yes, light pollution can be reduced through various methods such as using shields on outdoor lights to direct light downward, using motion sensors to only activate lights when needed, and using energy-efficient lighting sources. However, completely eliminating light pollution may not be possible in heavily populated areas.

3. How does light pollution affect human health?

Light pollution can have negative effects on human health, such as disrupting sleep patterns and circadian rhythms. This can lead to fatigue, difficulty concentrating, and increased risk of certain health issues such as obesity and depression. It can also contribute to air and water pollution, which can impact overall human health.

4. What can individuals do to help reduce light pollution?

Individuals can help reduce light pollution by using energy-efficient lighting, turning off unnecessary lights, and advocating for responsible outdoor lighting practices in their community. Additionally, using blackout curtains or shades can help reduce the amount of light entering homes at night.

5. How does light pollution affect astronomical research?

Light pollution can greatly impact astronomical research by limiting the visibility of stars and other objects in the night sky. This can make it difficult to gather accurate data and can also hinder the discovery of new celestial objects. Astronomers often have to travel to remote locations with little light pollution in order to conduct their research effectively.

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