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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
  • 2,659 topics
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Review of a discarded 2003... - last post by dnrmilspec

Celestial Events

Welcome to Celestial Events, a bulletin board for announcements about currently or soon to be observable astronomical events. Need a finder chart for that bright comet? Want to know when the next meteor shower will peak? Looking for suggestions on what to observe? Visit regularly for answers to all your questions about what's happening now in the celestial show.If folks want to discuss these events, the staff of Cloudy Nights invites you to start or join a thread in the appropriate observing forum. Celestial Events is for announcements only.

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June 2023 Celestial Calendar - 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
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Do I need to wash my primar... - last post by Jon Isaacs

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)

  • 14,389 topics
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UFOs:  Have you or any of y... - last post by Tom Barnacle


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
  • 1,363 topics
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Northeastern US (Maine) Dis... - last post by Scott123

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.

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Sunglasses in the city (at... - last post by bobzeq25

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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
  • 25,589 topics
  • 430,108 replies
ATM newbie - planning 8... - last post by Rodastro


"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

  • 21,719 topics
  • 360,806 replies
Upgrade the "generic... - last post by edwincjones


Binoviewer discussion forum

Forum moderators: nikm, noisejammer, spazmore
  • 5,928 topics
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Understanding Binoviewers - last post by cahanc

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).

  • 24,168 topics
  • 372,356 replies
View changes dramatically w... - last post by dweller25

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
  • 17,634 topics
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Astronomical Shipping Costs... - last post by Jon Isaacs

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
  • 41,110 topics
  • 463,686 replies
Has anyone created their ow... - last post by Jon Isaacs


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

Forum moderators: FirstSight, noisejammer, therealdmt, Uwe Pilz
  • 38,267 topics
  • 741,936 replies
Televue DeLite Eyepieces fo... - last post by PKDfan


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
  • 44,781 topics
  • 525,386 replies
Noob Question of the Year -... - last post by GTom

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
  • 2,273 topics
  • 32,925 replies
Digital Night Vision Use Th... - last post by AlpineUltra


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
  • 7,448 topics
  • 138,774 replies
Observatory and splashing w... - last post by Arie


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

  • 26,604 topics
  • 452,187 replies
R200SS star test – is this... - last post by areyoukiddingme


A forum for discussing refractor telescopes.

  • 35,822 topics
  • 819,043 replies
Highest terrestrial usable... - last post by Tony Flanders

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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
  • 51,772 topics
  • 362,301 replies
Jupiter March 2nd - last post by Traveler

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.

  • 79,207 topics
  • 819,576 replies
Narrowband Filter Problem - last post by lumos

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.

  • 61,846 topics
  • 535,790 replies
PixInsight 1.8.9-2 Build 16... - last post by GKA

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
  • 49,835 topics
  • 414,858 replies
Flats seem to dim? (Lumix S5) - last post by Whereisclearsky

Film Astrophotography

Discussions about astrophotography using film.

Forum moderators: mewmartigan, Uwe Pilz
  • 2,673 topics
  • 18,913 replies
Film hypersensitisation - last post by SteveInNZ

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.

  • 9,853 topics
  • 162,704 replies
EAA Observation Reports - last post by BrentKnight


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

Forum moderators: frank5817, mdowns, Uwe Pilz
  • 14,948 topics
  • 136,091 replies
NGC 2266 - last post by bphaneuf

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
  • 351 topics
  • 13,375 replies
Failure in seestar - last post by david123.

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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
  • 9,597 topics
  • 99,831 replies
Lunar Occultation of Antare... - last post by MrSyzygy

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.)

  • 9,986 topics
  • 72,537 replies
Lunar tracking with PHD2. - last post by steveward53

Deep Sky Observing

A dark place to discuss deep sky observing and observations

Forum moderators: BrentKnight, cuzimthedad, GUS.K, Katz
  • 10,585 topics
  • 132,413 replies
Sirius naked eye sightings... - last post by TOMDEY

Double Star Observing

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

Forum moderators: AnakChan, Uwe Pilz, zombie1210
  • 4,483 topics
  • 47,437 replies
What is the allure of doubl... - last post by Nucleophile

Solar Observing and Imaging

Hot place to discuss solar observing and imaging topics

Forum moderators: GUS.K, gustavo_sanchez, Jared, Napp, nicknacknock
  • 41,000 topics
  • 307,209 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
  • 1,214 topics
  • 13,394 replies
120mm f5 achromat plus DSLR... - last post by Cajundaddy

Comet Observing and Imaging

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

  • 220 topics
  • 1,074 replies
Comet 12P of complex structure - last post by stanislas-jean

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
  • 2,235 topics
  • 18,247 replies
T UMa Magnitude Question - last post by smithrrlyr

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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
  • 18,966 topics
  • 227,268 replies
Celestron Star sense alignm... - last post by MunichAtNight

Questar Forum

A forum for discussing Questar and Quantum telescopes

Forum moderators: nicknacknock, zombie1210
  • 2,619 topics
  • 32,415 replies
Splitting Sirius and the Pup - last post by Kevin Barker

Meade Computerized Telescopes

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

  • 11,671 topics
  • 100,631 replies
Opening the bottom of an ET... - last post by cavedweller

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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
  • 4,228 topics
  • 104,855 replies
TSP 2025 - last post by Keith Rivich

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
  • 5,739 topics
  • 64,190 replies
New Study Explains Why Inte... - last post by jokrausdu

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
  • 11,802 topics
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Stellarium, Need Help Plz,... - last post by michael8554

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.

  • 6,886 topics
  • 102,265 replies
Science Jokes IV... - last post by chrysalis

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
  • 1,380 topics
  • 12,048 replies
Lunar meteorite? - last post by lee14

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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
  • 1,758 topics
  • 24,087 replies
Lens design advice: aspheri... - last post by runcyclexcski

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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
  • 7,157 topics
  • 54,261 replies
Astro Capture for Android - last post by antarex

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