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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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ATTN - Change in Vendor Rul... - last post by cbwerner

Discussion of CN Articles, Reviews, and Reports

A place to discuss the articles posted on Cloudy Nights

Forum moderators: Dan Crowson, The Ardent
  • 2,538 topics
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Cosmic Challenge: Alphabet... - last post by Dave Mitsky

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.

Forum moderators: Dave Mitsky
  • 286 topics
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June 2021 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: CltFlyboy, GUS.K, Jond105, spereira
  • 32,580 topics
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Can't find the right si... - last post by gene 4181

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)

Forum moderators: csa/montana, Jond105, spereira, Tyson M, Uwe Pilz
  • 12,743 topics
  • 243,253 replies
About visual astronomy - last post by BFaucett


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: CltFlyboy, mdowns
  • 1,111 topics
  • 16,861 replies
Northeastern US (Maine) Dis... - last post by Mike96

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.

Forum moderators: csa/montana, MJB87, Napp, osbourne one-nil
  • 2,094 topics
  • 26,991 replies
Favorite coastal stargazing... - last post by MJB87

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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, rgsalinger, Sean Cunneen
  • 22,501 topics
  • 371,170 replies
Mirror Coatings: Enhanced o... - last post by stargazer193857


"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

Forum moderators: Erik Bakker, sbradley07, Uwe Pilz
  • 18,415 topics
  • 279,449 replies
Oberwerk 15x70 Ultra Questions - last post by MarMax


Binoviewer discussion forum

Forum moderators: junomike, nmoushon, noisejammer
  • 5,337 topics
  • 56,764 replies
Need replacement prism for... - last post by bluecoast

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).

Forum moderators: gustavo_sanchez, Jaimo!, jerahian
  • 20,485 topics
  • 309,857 replies
The Orion 127 vs. 150mm Mak. - last post by tommy10

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: mdowns, Sean Cunneen, Wisconsin Steve
  • 15,716 topics
  • 421,114 replies
Included eyepieces with Roy... - last post by MisterDan


A forum for any general equipment discussion, accessories and a great starting point if you are not sure where to post that burning question about equipment. You may get better answers to specialized questions in other fora (astrophotography, mounts, etc).

Forum moderators: MJB87, rgsalinger
  • 34,933 topics
  • 394,356 replies
Second scope options - what... - last post by xvariablestarx


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

  • 34,307 topics
  • 629,600 replies
TS 28mm/Meade PWA 28mm 82°... - last post by stevew


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: alphatripleplus, Jaimo!, MJB87, sbradley07
  • 37,078 topics
  • 427,003 replies
ASA mounts vs 10 Microns vs... - last post by Arie

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: Jond105, MJB87, Tyson M
  • 1,436 topics
  • 20,682 replies
Filter size for night vision - last post by George9


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: Dan Crowson, MJB87, nmoushon
  • 6,398 topics
  • 121,467 replies
Any suggestions for buying... - last post by EdM2


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

  • 23,574 topics
  • 392,128 replies
Cooling Mirror in water bath - last post by astrokeith


A forum for discussing refractor telescopes.

  • 31,067 topics
  • 674,152 replies
f6.5 vs f7, how much of a d... - last post by premk19

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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 and our moon. 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. Aesthetic Deep Sky Object Imaging should generally be discussed in the Beginning or Experienced DSO Imaging Fora.

Forum moderators: nmoushon, Sean Cunneen, spereira, TimN
  • 43,460 topics
  • 297,078 replies
Jupiter, Saturn, moons, col... - last post by Ittaku

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.

Forum moderators: jerahian, nmoushon, TimN
  • 57,947 topics
  • 587,452 replies
Messier 8 - Narrowband - last post by CrossoverManiac

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.

Forum moderators: Dan Crowson, sbradley07, TimN
  • 50,998 topics
  • 438,984 replies
APS-C sensor, 36mm vs 50mm... - last post by Chris Ryan

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: Napp, rgsalinger, TimN
  • 46,025 topics
  • 378,898 replies
SVBONY SV503 Telescope, 70E... - last post by galacticinsomnia

Film Astrophotography

Discussions about astrophotography using film.

Forum moderators: Erik Bakker, Uwe Pilz
  • 2,556 topics
  • 17,812 replies
First (star)light on 4x5 - last post by SteveInNZ

Electronically Assisted Astronomy (EAA)

Electronically Assisted Astronomy (EAA) is the use of an analog or digital image capturing device in lieu of an eyepiece at the telescope. Here members can talk about the equipment used, share their observing experiences, and post sketches and images captured with EAA devices.

Forum moderators: alphatripleplus, jerahian, Sean Cunneen
  • 7,848 topics
  • 114,981 replies
Could this work for EAA - last post by Bill05


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

Forum moderators: frank5817, mdowns, Uwe Pilz
  • 12,868 topics
  • 120,413 replies
Don't forget the June c... - last post by mdowns

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Solar System Observing

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

Forum moderators: GUS.K, gustavo_sanchez, Jaimo!
  • 8,448 topics
  • 86,619 replies
Techniques for Planets?... - last post by Redbetter

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.)

Forum moderators: frank5817, gustavo_sanchez, Tyson M
  • 7,055 topics
  • 55,479 replies
Gassendi, low illumination,... - last post by Visit-the-Moon

Deep Sky Observing

A dark place to discuss deep sky observing and observations

Forum moderators: cuzimthedad, Jond105, spereira
  • 9,364 topics
  • 112,366 replies
Bright nova in Hercules (TC... - last post by Redbetter

Double Star Observing

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

Forum moderators: Jond105, Tyson M, Uwe Pilz
  • 3,774 topics
  • 39,747 replies
Binocular Double Stars - last post by Fiske

Solar Observing and Imaging

Hot place to discuss solar observing and imaging topics

Forum moderators: gustavo_sanchez, Jaimo!
  • 33,232 topics
  • 263,069 replies
Finally the Sun came out :) - last post by torsinadoc

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, rgsalinger
  • 1,729 topics
  • 12,757 replies
My 3D-printed DIY spectrograph - last post by gregj888

Toggle Telescope Specific Forums Telescope Specific Forums

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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, junomike
  • 16,578 topics
  • 199,770 replies
Starsense Explorer - Viewin... - last post by GilATM

Questar Forum

A forum for discussing Questar and Quantum telescopes

Forum moderators: Erik Bakker, Wisconsin Steve
  • 2,225 topics
  • 25,991 replies
H-alpha Questar Sunspot 283... - last post by mtr1

Meade Computerized Telescopes

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

Forum moderators: CltFlyboy, osbourne one-nil
  • 10,420 topics
  • 89,430 replies
Rebuilding the 497 HC - 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, spereira
  • 3,737 topics
  • 95,895 replies
2021 Cherry Springs Star Pa... - last post by nateman_doo

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: junomike, spereira, The Ardent
  • 4,837 topics
  • 50,832 replies
Show us your astro book shelf - last post by dpastern

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: alphatripleplus, Napp, rgsalinger
  • 8,764 topics
  • 74,923 replies
Triying to download FlexRx... - last post by freestar8n

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.

Forum moderators: cuzimthedad, FirstSight, junomike
  • 5,694 topics
  • 86,223 replies
The new space race - last post by Bowlerhat

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, mdowns, TimN
  • 1,237 topics
  • 11,079 replies
New Meteorite Sourced Crate... - last post by ColoHank

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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: sbradley07, Sean Cunneen
  • 1,612 topics
  • 22,982 replies
AM Scope eyepiece question - last post by MisterDan

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Vendor and Group Announcements

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

Forum moderators: GUS.K, osbourne one-nil, rgsalinger
  • 6,037 topics
  • 45,589 replies
APM Eyepieces Are in at Eye... - last post by Ben the Ignorant

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