Page 1 of 2 12 LastLast
Results 1 to 10 of 14
Like Tree1Likes

Thread: Dark Skies versus Light Polluted Skies

  1. #1
    josmith16's Avatar
    josmith16 is offline Main Sequence
    Points: 5,496, Level: 50
    Level completed: 73%, Points required for next Level: 54
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement
    Join Date
    Jul 2011
    Location
    Bartlett, TN, USA
    Posts
    192
    Points
    5,496
    Level
    50
    Thanks
    21
    Thanked 51x 30 Posts

    Default Dark Skies versus Light Polluted Skies



    I have only viewed from my backyard, which is in a very light polluted suburb of a major US city. I am planning on going with the local Astronomical Group for Dark Sky view. What type of difference should I expect from my 127mm telescope going from a light polluted site to a dark sky site generally speaking?

  2. #2
    Zeiss's Avatar
    Zeiss is offline SUPER GIANT
    Points: 10,028, Level: 69
    Level completed: 26%, Points required for next Level: 222
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience Points50 Posts Achievement!5 Threads Achievement!400+ Posts Achievement
    Join Date
    Aug 2011
    Location
    Minnesota
    Posts
    828
    Points
    10,028
    Level
    69
    Thanks
    304
    Thanked 284x 202 Posts

    Default

    Big, even using naked eye you will see many more targets.
    15 inch Obsession
    Low Power: ES 28mm ~60x @1.1░ : Televue Delos 17.3mm ~100x @.72░
    Medium Power: ES 14mm ~122x @.82░ : Televue Delos 10mm ~170x @.42░
    High Power: Televue Delos 6mm ~285x @.25░ : ES 4.7mm ~365x @.22░

  3. #3
    neal_mlc's Avatar
    neal_mlc is offline HYPER GIANT
    Points: 25,208, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 1.0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience Points400+ Posts Achievement365 Days+ Registered Achievement!750 Days+ Registered Achievement!
    Join Date
    Sep 2010
    Location
    Marana Az
    Posts
    3,236
    Points
    25,208
    Level
    100
    Thanks
    456
    Thanked 948x 735 Posts

    Default

    HUGE difference, just getting to a Bortle green is amazing. The Milky Way in a Blue zone will actually be a nuisance when trying to star hop
    Pier mounted Celestron CGEM, Celestron Classic 8,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST80
    Canon T3i, Mallincam Skyraider-AG1.2c
    Telrad, DIY Peltier cooling box, Astromania filter wheel
    ES 2" 25mm EP, Celestron 21mm Ultima Duo EP, University Optics 16mm Konig II EP, 12.5mm Ill. Ret. EP
    BYEOS, StarTools, DSS, Registax, PHD2, NexRemote, TeamViewer, MallincamSky, APT
    https://www.facebook.com/Square-Stars-415025665141/

  4. #4
    jerryTheC's Avatar
    jerryTheC is offline Super Moderator
    Points: 26,972, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 11.0%
    Achievements:
    365 Days+ Registered Achievement!50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!First 1000 Experience Points
    Join Date
    Apr 2011
    Location
    Harrow, UK
    Posts
    6,032
    Points
    26,972
    Level
    100
    Thanks
    335
    Thanked 1,915x 1,623 Posts

    Default

    You'll get a darker sky background,which will let you see more stars with the naked eye, and the milky way.

    Away from neighbourhood lights,your eyes should be able to dark adapt properly, letting you see fainter objects.

    With a scope, you should be able to spot some of the lower surface brightness deep sky objects that are normally washed out by the brighter light polluted sky background.

    Bright objects like the moon and planets should be about the same - they depend more on the seeing than the background.
    <i><span style="font-family: Times New Roman"><font size="2"><b>SCT:</b> N11GPS <b>Refractors:</b> FS-60C/CSV, ZD-66, A80SS, FSQ106ED <b>Binoculars:</b> 8x42, 15x70<br /><b>Eyepieces:</b> 40mm Meade SWA, 28mm UWAN, 17mmT4, 12mmT4, 2.5mmT6 Nagler, 17mm, 8mm, 5mm LVW, HI-LE2.8<br /> <a href="
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    target="_blank"><i><font size="2"><span style="font-family: times new roman">Astronomy Forum Rules &amp; Terms of Service</span></font></i></a>

  5. #5
    Eor312's Avatar
    Eor312 is offline Banned
    Points: 1,874, Level: 26
    Level completed: 74%, Points required for next Level: 26
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!First 1000 Experience Points400+ Posts Achievement
    Join Date
    Nov 2011
    Location
    TN
    Posts
    235
    Points
    1,874
    Level
    26
    Thanks
    59
    Thanked 129x 79 Posts

    Default

    I live in a Red area. I drive an hour to a green area every so often.

    Best way I can describe it is this...

    Pleiades looks about the same in my 6" SCT in the red area as it does to the naked eye in the green area.
    JScerb likes this.

  6. #6
    Mageta's Avatar
    Mageta is offline White Dwarf
    Points: 4,110, Level: 43
    Level completed: 7%, Points required for next Level: 140
    Overall activity: 0%
    Achievements:
    5 Threads Achievement!2 Posts Achievement20 Posts Achievement!365 Days+ Registered Achievement!50 Posts Achievement!
    Join Date
    Jan 2012
    Location
    Minnesota
    Posts
    36
    Points
    4,110
    Level
    43
    Thanks
    3
    Thanked 11x 7 Posts

    Default

    I'm assuming the color coded areas refer to light pollution? Where do you get that information? It seems like it would be useful in locating possible observation sites.

  7. #7
    Eor312's Avatar
    Eor312 is offline Banned
    Points: 1,874, Level: 26
    Level completed: 74%, Points required for next Level: 26
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!First 1000 Experience Points400+ Posts Achievement
    Join Date
    Nov 2011
    Location
    TN
    Posts
    235
    Points
    1,874
    Level
    26
    Thanks
    59
    Thanked 129x 79 Posts

    Default

    Quote Originally Posted by Mageta View Post
    I'm assuming the color coded areas refer to light pollution? Where do you get that information? It seems like it would be useful in locating possible observation sites.
    Correct.

    There are several sources, but I get it from the Clear Sky Chart site. When you select your preferred Clear Sky Chart, one of the links below it will be "Light Pollution Map"

    I see, for example, you're in Minnesota. We'll use the Minneapolis chart for this example.

    Hit the "Light Pollution Map" link in the "Nifty Links" section, and you'll see the map for that area, a key to decipher it, and the options to overlay it in Google maps, or even better, download a KML file to overlay in Google Earth.

    This latter method is how I've found my preferred dark sky sites. Simply fire up Google Earth, import the KML overlay of the light pollution map, and look for the dark areas. Then you can plan routes, find addresses, plug LatLong into your GPS device, etc.

    Hope that helps!

  8. The Following 2 Users Say Thank You to Eor312 For This Useful Post:

    dragracingdan (01-16-2012),Mageta (01-16-2012)

  9. #8
    Mageta's Avatar
    Mageta is offline White Dwarf
    Points: 4,110, Level: 43
    Level completed: 7%, Points required for next Level: 140
    Overall activity: 0%
    Achievements:
    5 Threads Achievement!2 Posts Achievement20 Posts Achievement!365 Days+ Registered Achievement!50 Posts Achievement!
    Join Date
    Jan 2012
    Location
    Minnesota
    Posts
    36
    Points
    4,110
    Level
    43
    Thanks
    3
    Thanked 11x 7 Posts

    Default

    Quote Originally Posted by Eor312 View Post
    Correct.

    There are several sources, but I get it from the Clear Sky Chart site. When you select your preferred Clear Sky Chart, one of the links below it will be "Light Pollution Map"

    I see, for example, you're in Minnesota. We'll use the Minneapolis chart for this example.

    Hit the "Light Pollution Map" link in the "Nifty Links" section, and you'll see the map for that area, a key to decipher it, and the options to overlay it in Google maps, or even better, download a KML file to overlay in Google Earth.

    This latter method is how I've found my preferred dark sky sites. Simply fire up Google Earth, import the KML overlay of the light pollution map, and look for the dark areas. Then you can plan routes, find addresses, plug LatLong into your GPS device, etc.

    Hope that helps!
    Very helpful information, thanks for the links.

  10. #9
    AndrewD's Avatar
    AndrewD is offline Bright Giants
    Points: 8,333, Level: 63
    Level completed: 61%, Points required for next Level: 117
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!50 Posts Achievement!5 Threads Achievement!First 1000 Experience Points365 Days+ Registered Achievement!
    Join Date
    Jul 2011
    Location
    Vermont,USA
    Posts
    475
    Points
    8,333
    Level
    63
    Thanks
    95
    Thanked 162x 118 Posts

    Default

    The difference will literally be night and day...no bad pun intended .
    As long as the seeing is good,prepare to pick your jaw off the ground is all I can say.
    Andrew
    Meade 10" SN LXD75 with UHTC, Losmandy G11 with
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    2, 4.5
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    reflector, Meade DS90, Meade 90mm,Orion 90mm guidescope,Coronado PST, JMI 55 focuser, Meade DSI, Meade LPI, Pentax istDS
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    , Orion white light filter,plus a bunch of unused color filters,Orion Starshoot Planetary imager and autoguider.

  11. #10
    RusElKnight's Avatar
    RusElKnight is offline White Dwarf
    Points: 757, Level: 15
    Level completed: 14%, Points required for next Level: 43
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!2 Posts Achievement20 Posts Achievement!365 Days+ Registered Achievement!
    Join Date
    Jan 2012
    Location
    Conyers, Georgia
    Posts
    41
    Points
    757
    Level
    15
    Thanks
    2
    Thanked 8x 7 Posts

    Default

    There is a huge difference in the night sky of my backyard with alot of light pollution, compared to the dark sky of my grandfathers backyard about and hour away. makes stargazing great even to the naked eye.

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. Astrophotography in light polluted skies?
    By HoustonSteve in forum Astro Imaging Forum
    Replies: 24
    Last Post: 01-01-2012, 11:22 PM
  2. going deep in light polluted skies
    By whirlpoolm51 in forum Deep Sky Objects Forum
    Replies: 1
    Last Post: 07-13-2011, 06:46 AM
  3. DSO observation in light polluted skies
    By afigueroa in forum General Stargazing Forum
    Replies: 33
    Last Post: 05-25-2010, 04:11 PM
  4. Finding Comet 17P in light polluted skies
    By canopus56 in forum Amateur Astronomy Forum
    Replies: 1
    Last Post: 10-28-2007, 02:05 PM
  5. planisphere for light-polluted skies?
    By Brian Tung in forum Amateur Astronomy Forum
    Replies: 2
    Last Post: 07-02-2006, 04:15 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin« Version 4.2.0
Powered by vBulletin«
All times are GMT. The time now is 02:46 AM.