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CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

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Cloudy Nights Announcements

News from the Cloudy Nights team pertaining to the website and forums

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On New Year’s Eve… - last post by Scott in NC

Discussion of CN Articles, Reviews, and Reports

A place to discuss the articles posted on Cloudy Nights

Forum moderators: Dan Crowson
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Cosmic Challenge: Alphabet... - last post by Dave Mitsky

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Beginners Forum (No Astrophotography)

A place for new astronomers to ask visual observing or basic equipment questions and report their findings.
- Advanced or specialized topics should be discussed in their dedicated forums.
- Beginning astrophotographers should read, and then post, in whichever imaging forum is most appropriate to their subject.

Forum moderators: DeepSky Di, GUS.K, nicknacknock, WadeH237
  • 35,985 topics
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Uneven mirror cell. - last post by Universe observer

General Observing and Astronomy

General Observing and Amateur Astronomy topics and questions that do not fit into our other forums. This includes unaided eye observing (satellites, weather, auroras etc) and non equipment topics (LASIK, observing sites, dressing for the cold/hot etc)

  • 14,488 topics
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Smart Phone mounts vs AP, ? - last post by JohnTMN


The official forum for the Astronomy Outreach Network. Post questions about Outreach, suggestions or even just publicize your Outreach events. If it has to do with promoting our great hobby, it goes here!

Forum moderators: Astrola72, CltFlyboy, mdowns
  • 1,380 topics
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How was your outreach exper... - last post by Bill Weir

Light Pollution

While CN does not typically allow politics, this is one forum in which the discussion of legislation dealing with this matter is permitted. This is a problem that will eventually affect all of us to one degree or another.

  • 2,602 topics
  • 34,099 replies
About That Particulate Matt... - last post by GeorgeLiv

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ATM, Optics and DIY Forum

Amateur Telescope Making (ATM) and any do it yourself related activities. Ask questions, discuss and post pictures of telescope related projects, optics, telescopes, observing chairs, etc.

Forum moderators: cuzimthedad, Jared, Sean Cunneen, revans
  • 25,743 topics
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Folded 12" Alvan Clark - last post by Guntram Lampert


"Best Of Binocular" Library, How to Choose, Equipment Minireviews, Observation Reports, Testing Aspects, Aberrations and Deficiencies, Books, Binocular Mounts, Observing Lists, Exit Pupil vs Eye Pupil, Binocular Vision and more

  • 21,847 topics
  • 363,799 replies
Sky Rover 8x42 APO "Ban... - last post by akdwivedi


Binoviewer discussion forum

Forum moderators: nikm, noisejammer, spazmore
  • 5,945 topics
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80mm refractor users - do y... - last post by Myles

Cats & Casses

A forum for discussing Cassegrain (Classic Cassegrain, Ritchey-Chrétien, Dall–Kirkham, etc) and Catadioptric telescopes (Schmidt and Maksutov Cassegrains, ACF, Edge HD, etc).

  • 24,327 topics
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Skymak Pro 180 tips? - last post by seven_legs

Classic Telescopes

Telescopes from an era gone by. The place to discuss older telescopes. Antiques, flea market finds, and scopes from grandpa's attic. From the 1780's to the mid-1990's - refractors, reflectors, and early SCT's. Discussing all aspects of restoring, collecting, and observing with older scopes. Discussion of 25-year-old scopes still in production is OK but please don't post newer examples of those, except for actual side-by-side comparisons to demonstrate detail changes.

Forum moderators: CltFlyboy, Jared, Sean Cunneen, mdowns
  • 17,709 topics
  • 500,359 replies
What makes an old Achromat... - last post by RichA

Equipment (No astrophotography)

A forum for discussion of visual and general astronomy equipment and accessories; a default location if you your topic does not fit into any of the more specialized equipment forums such as Mounts, Eyepieces, Refractors, etc.

Topics related to astronomy cameras and related imaging equipment should be posted in whichever imaging forum is most appropriate to that topic. These can be found in the Astrophotography and Sketching category.

Forum moderators: Jared, Katz, mewmartigan, MJB87, Wildetelescope
  • 41,263 topics
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Equipment identification… - last post by wrvond


A place to discuss our favorite eyepieces and eyepiece accessories, barlows, filters, etc.

Forum moderators: FirstSight, noisejammer, therealdmt, Uwe Pilz
  • 38,415 topics
  • 746,356 replies
Removing the Powermate body - last post by betacygni


A Forum to discuss all types of mounts and mount accessories - including computerized, manual, GEM, fork mount, parallactic, alt-az, DSCs, PushTo and GoTo systems.

Forum moderators: FrostByte, MJB87, polslinux, sbradley07
  • 45,086 topics
  • 528,755 replies
ZWO AM5 Owners' Club - last post by akdwivedi

Night Vision Astronomy

Night Vision Astronomy is astronomy performed with analog or digital devices capable of producing a real time view of celestial objects. This forum allows discussion of the equipment, its configuration and use, observing reports made using the devices, techniques for image capture, and the sharing of images the observer made to record their observations.

Forum moderators: DeepSky Di, nicknacknock, polslinux
  • 2,294 topics
  • 33,084 replies
EBI vs SNR and thoughts on... - last post by chemisted


A forum for discussing the ins and outs of current observatories as well as sharing designs, and ideas. Manufacturers and Vendors are invited to attend.

Forum moderators: Astrola72, Dan Crowson, MJB87, nikm
  • 7,475 topics
  • 139,485 replies
Deck Engineering (Backyard... - last post by mmalik


A forum for discussing Newtonian type reflecting telescopes (including Schmidt and Maksutov designs as well as Herschelian, Off-Axis, etc).

  • 26,702 topics
  • 454,079 replies
Dobsonian mirror removal my... - last post by JJDreese


A forum for discussing refractor telescopes.

  • 36,026 topics
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Agema Optics anyone? - last post by Holger aus Brandenburg

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Major & Minor Planetary Imaging

This forum is intended for discussion related to the imaging and processing of anything in the solar system other than our Sun, Moon, and comets. Solar imaging discussion should occur in the target-oriented "Solar Observing & Imaging" forum. Posts about imaging our Moon should go in the target-oriented "Lunar Observing & Imaging" forum. Posts about imaging comets should go in the target-oriented "Comet Observing and Imaging" forum. Aesthetic Deep Sky Object Imaging should generally be discussed in the Beginning or Experienced DSO Imaging Forum

Forum moderators: Sean Cunneen, nikm, Professor2112, RedLionNJ, TimN
  • 51,842 topics
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678MM appears - last post by John Boudreau

Beginning Deep Sky Imaging

This forum is intended for discussion related to beginning Deep Sky Object (DSO) imaging using any type of camera or mount. If you are interested in specialized or more sophisticated DSO techniques or are interested in imaging non-DSO targets please start your topic in a more appropriate forum.

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Has anyone mounted a powere... - last post by limeyx

Experienced Deep Sky Imaging

This forum is intended for discussion about practice & theory related to prime-focus Deep Sky Object (DSO) imaging through a telescope using any type of camera. If you are a beginner or interested in more specialized types of imaging, please use the appropriate forum.

  • 62,232 topics
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Need help advice cleaning A... - last post by Mugrelo

DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging

This forum is for more advanced discussion about accessories, techniques or approaches to astrophotography with general purpose (not astronomy dedicated) digital cameras. Topics include (but are not limited to): advanced afocal approaches, minimalist & camping rigs, nightscape photography, accessories & modifications. Discussions involving prime focus imaging with general purpose cameras can certainly occur here, but are also welcome in the Beginning or Experienced DSO Imaging Fora.

Forum moderators: FrostByte, Napp, spazmore, TimN
  • 49,946 topics
  • 415,898 replies
Sigma - last post by ro311974

Film Astrophotography

Discussions about astrophotography using film.

Forum moderators: mewmartigan, Uwe Pilz
  • 2,676 topics
  • 18,929 replies
Film still viable? I have a... - last post by archer1960

Electronically Assisted Astronomy (No Post-Processing)

Electronically Assisted Astronomy (EAA) is the use of a camera in lieu of an eyepiece at the telescope to capture and view images in near real time. For the purposes of this forum, near real time images must have a maximum total integration of no more than 60 minutes and cannot be post-processed. The purpose of the EAA Forum is to give members a place to share their observing experiences, talk about the equipment used, and post images captured with EAA devices.

  • 9,946 topics
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EAA Image Gallery - last post by MarMax


A forum for the discussion of sketching stellar objects, and displaying user drawings.

Forum moderators: frank5817, mdowns, Uwe Pilz
  • 15,027 topics
  • 136,649 replies
A detailed crater and an ob... - last post by JMSchwartz

Smart Telescopes

A forum for the discussion of all-in-one, computer controlled, astrographs. Such instruments include, but are not limited to, those made by Vaonis, Unistellar, DwarfLab & ZWO. This forum is intended for the discussion of instrument-specific hardware and software. The processing of final images, their use for outreach, or general astronomy topics may be more appropriate in other Cloudy Nights forums.

Forum moderators: FrostByte, mdowns, Napp
  • 447 topics
  • 15,420 replies
Vespera II First Images - last post by Psion

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Solar System Observing

A friendly place to discuss planetary & solar system object observing.

Forum moderators: GUS.K, gustavo_sanchez, Napp, Starlancer
  • 9,628 topics
  • 100,053 replies
Jupiter Uranus Conjunction - last post by B 26354

Lunar Observing and Imaging

A forum dedicated to the observation and appreciation of our Moon. Join us in the Lunie Bin and learn about the only world other than the Earth to bear the imprint of human feet. Images and sketches are most welcome. (Please limit the size of image files to 500K.)

  • 10,127 topics
  • 73,642 replies
The April 15 First Quarter... - last post by james7ca

Deep Sky Observing

A dark place to discuss deep sky observing and observations

Forum moderators: BrentKnight, cuzimthedad, GUS.K, Katz
  • 10,647 topics
  • 133,250 replies
Observing Omega Centauri An... - last post by 34degN

Double Star Observing

Double Stars, Rayleigh Limit and Dawes Limit; a place for observers with split personalities.

Forum moderators: AnakChan, Uwe Pilz, zombie1210
  • 4,517 topics
  • 47,715 replies
Splitting Theta Aurigae - last post by CHnuschti

Solar Observing and Imaging

Hot place to discuss solar observing and imaging topics

Forum moderators: GUS.K, gustavo_sanchez, Jared, Napp, nicknacknock
  • 41,499 topics
  • 310,415 replies
SDO/HMI and GONG Images on... - last post by SgrB2

Solar Eclipses

A forum for discussion of all things related to the North American total solar eclipses of 2017 and 2024, as well as any other solar eclipses - events, outreach, equipment, etc.
***Note that the 2017 forum is locked, but is still available for viewing.***

Forum moderators: DeepSky Di, MJB87, nicknacknock, RedLionNJ
  • 1,785 topics
  • 19,844 replies
Total Solar Eclipse 2024 -... - last post by VStwKE

Comet Observing and Imaging

A place to discuss all things about comets. Both observing and imaging topics are welcome here.

  • 289 topics
  • 1,589 replies
Long-awaited Comet 12P/Pons... - last post by Alexandrite

Scientific Amateur Astronomy

A forum where amateurs can discuss their contributions to fields such as spectroscopy, photometry, astrometry, interferometry, and radio astronomy. Astronomical objects of interest may include variable and carbon stars, pulsars, supernovae, AGNs, exoplanets, asteroids, and short-lived energetic phenomena such as GRBs. The presentation of quantitative observational measurements, techniques used for acquisition, and relevant ensuing discussion are especially welcome.

Forum moderators: GUS.K, mewmartigan, RedLionNJ, Starlancer
  • 2,248 topics
  • 18,382 replies
AstroImageJ Placing Apertur... - last post by topcode

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Celestron Computerized Telescopes

Discussion forum for Celestron computerized telescopes and mounts using NexStar and StarSense technologies, including CPC, CPC Deluxe HD, NexStar SE/SLT/Evolution, etc.

Forum moderators: GUS.K, nicknacknock, Wildetelescope
  • 19,074 topics
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Nextar evolution alignment... - last post by Wdh

Questar Forum

A forum for discussing Questar and Quantum telescopes

Forum moderators: nicknacknock, zombie1210
  • 2,630 topics
  • 32,555 replies
Photos - moon, planets, sta... - last post by RMay

Meade Computerized Telescopes

A forum to discuss advanced Meade scopes. Among them the ETX, LX90, LX200, LX200 GPS, RCX, and the LX200 ACF series.

  • 11,728 topics
  • 101,076 replies
LX200GPS-cant find target - last post by OzAndrewJ

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Astronomy Clubs, Star Parties, Shows, & Conferences

For discussion and announcements of astronomy club meetings, star parties, astronomy conferences and other events.

Forum moderators: Dan Crowson, Napp, revans
  • 4,251 topics
  • 105,090 replies
Recommendations for Interna... - last post by Andrii Dzygunenko

Astro Art, Books, Websites & Other Media

A place to share your astronomy artwork (non-photographic) and *non* commercial astronomy websites and discuss astro related books, magazines, charts, movies and TV shows.

Forum moderators: BrentKnight, Katz
  • 5,769 topics
  • 64,582 replies
The Sky This Month - last post by Dave Mitsky

Astronomy Software & Computers

This is the place to discuss all things associated with computers & gadgets, both hardware and software (including PDAs, smartphones, tablets, laptops, astronomy programs and apps, Celestron SkyScout and Meade MySky devices, etc.) -- as they relate to astronomy.

Forum moderators: Napp, WadeH237
  • 11,919 topics
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Using the NINA Aberration I... - last post by han.k

Science! Astronomy & Space Exploration, and Others

Discuss all science topics, particularly the sciences relating to Astronomy and Space Exploration. This includes all the natural sciences: Physics, Chemistry, Geology, and Biology. They can include applied sciences such as engineering and construction as well. Wherever the scientific method is used, you can discuss it here. As always, no politics, pseudo-science, crack-pottery, or anti-science.

  • 6,936 topics
  • 103,064 replies
NASA's financial woes.... - last post by Skywatchr

Space Rocks

This is the place to discuss meteorites and related subjects - including tektites, impact theories, and parent bodies. Got a question about collecting or caring for your meteorites? Ask it here.

Forum moderators: jerahian, MJB87, mdowns, TimN
  • 1,391 topics
  • 12,153 replies
melt breccia meteorite? - last post by leonardovaller

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Cloudy Days & Microscopes

This forum is to discuss birding and other daytime or indoor terrestrial usage of optics, and related equipment; e.g. microscopes.

Forum moderators: j.gardavsky, Sean Cunneen, sbradley07
  • 1,765 topics
  • 24,127 replies
High-flying-plane spotting... - last post by Marcin_78

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Vendor and Group Announcements

A place for vendors and non-CN related organizations to post announcements.

Forum moderators: CltFlyboy, GUS.K, osbourne one-nil
  • 7,204 topics
  • 54,727 replies
Astrowl Project : Highly po... - last post by rommor

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