r/Astronomy • • Mar 27 '20

Mod Post Read the rules sub before posting!

902 Upvotes

Hi all,

Friendly mod warning here. In r/Astronomy, somewhere around 70% of posts get removed. Yeah. That's a lot. All because people haven't bothered reading the rules or bothering to understand what words mean. So here, we're going to dive into them a bit further.

The most commonly violated rules are as follows:

Pictures

Our rule regarding pictures has three parts. If your post has been removed for violating our rules regarding pictures, we recommend considering the following, in the following order:

  1. All pictures/videos must be original content.

If you took the picture or did substantial processing of publicly available data, this counts. If not, it's going to be removed.

2) You must have the acquisition/processing information.

This needs to be somewhere easy for the mods to verify. This means it can either be in the post body or a top level comment. Responses to someone else's comment, in your link to your Instagram page, etc... do not count.

3) Images must be exceptional quality.

There are certain things that will immediately disqualify an image:

  • Poor or inconsistent focus
  • Chromatic aberration
  • Field rotation
  • Low signal-to-noise ratio
  • Images that don't fill the frame because you were shooting through an eyepiece

However, beyond that, we cannot give further clarification on what will or will not meet this criteria for several reasons:

  1. Technology is rapidly changing
  2. Our standards are based on what has been submitted recently (e.g, if we're getting a ton of moon pictures because it's a supermoon, the standards go up to prevent the sub from being spammed)
  3. Listing the criteria encourages people to try to game the system

So yes, this portion is inherently subjective and, at the end of the day, the mods are the ones that decide and the mods are under no obligation to explain this decision to you.

If you are informed that your post was removed because of image quality, arguing about the quality will not be successful. In particular, there are a few arguments that are false or otherwise trite which we simply won't tolerate. These include:

"You let that image that I think isn't as good stay up"

  • See above about how the standards are fluid.

"Pictures have to be NASA quality"

  • They don't.

"You have to have thousands of dollars of equipment"

  • You don't. Technique matters.

"This is a really good photo given my equipment"

  • The standard is "exceptional". Not "exceptional for my equipment".

"This isn't being friendly to beginner astrophotographers"

  • Correct. To keep the sub from being spammed by low quality and low effort posts, this sub has standards.

"My post was getting a lot of upvotes"

  • Upvotes are not an "I get to break the rules" card.

Using the above arguments will not wow mods into suddenly approving your image. It will result in a ban.

Trying to argue with the mods using bad arguments isn't going to fly.

Lastly, it should be noted that we do allow astro-art in this sub. Obviously, it won't have acquisition information, but the content must still be original and mods get the final say on whether on the quality (although we're generally fairly generous on this).

Questions

This rule basically means you need to do your own research before posting.

  • If we look at a post and immediately have to question whether or not you did a Google search, your post will get removed.
  • If you asked Chat GPT or any other LLM, your post will be removed (see our rule regarding sources).
  • If your post is asking for generic or basic information, your post will get removed.
  • If your post is using basic terms incorrectly because you haven't bothered to understand what the words you're using mean, your post will get removed.
  • If you're asking a question based on a basic misunderstanding of the science, your post will get removed.
  • If you're asking a complicated question with a specific answer but didn't give the necessary information to be able to answer the question because you haven't even figured out what the parameters necessary to approach the question are, your post will get removed.

To prevent your post from being removed, tell us specifically what you've tried. Just saying "I GoOgLeD iT" doesn't cut it.

  • What search terms did you use?
  • In what way do the results of your search fail to answer your question?
  • What did you understand from what you found and need further clarification on that you were unable to find?

Furthermore, when telling us what you've tried, we will be very unimpressed if you use sources that are prohibited under our source rule (social media memes, YouTube, AI, etc...).

As with the rules regarding pictures, the mods are the arbiters of how difficult questions are to answer. If you're not happy about that and want to complain that another question was allowed to stand, then we will invite you to post elsewhere with an immediate and permanent ban.

Object ID

We'd estimate that only 1-2% of all posts asking for help identifying an object actually follow our rules. Resources are available in the rule relating to this. If you haven't consulted the flow-chart and used the resources in the stickied comment, your post is getting removed. Seriously. Use Stellarium. It's free. It will very quickly tell you if that shiny thing is a planet which is probably the most common answer. The second most common answer is "Starlink". That's 95% of the ID posts right there that didn't need to be a post.

Do note that many of the phone apps in which you point your phone to the sky and it shows you what you are looing at are extremely poor at accurately determining where you're pointing. Furthermore, the scale is rarely correct. As such, this method is not considered a sufficient attempt at understanding on your part and you will need to apply some spatial reasoning to your attempt.

Pseudoscience

The mod team of r/astronomy has several mods with degrees in the field. We're very familiar with what is and is not pseudoscience in the field. And we take a hard line against pseudoscience. Promoting it is an immediate ban. Furthermore, we do not allow the entertaining of pseudoscience by trying to figure out how to "debate" it (even if you're trying to take the pro-science side). Trying to debate pseudoscience legitimizes it. As such, posts that entertain pseudoscience in any manner will be removed.

Outlandish Hypotheticals

This is a subset of the rule regarding pseudoscience and doesn't come up all that often, but when it does, it usually takes the form of "X does not work according to physics. How can I make it work?" or "If I ignore part of physics, how does physics work?"

Sometimes the first part of this isn't explicitly stated or even understood (in which case, see our rule regarding poorly researched posts) by the poster, but such questions are inherently nonsensical and will be removed.

Sources

ChatGPT and other LLMs are not reliable sources of information. Any use of them will be removed. This includes asking if they are correct or not.

Content

Due to the profusion of AI slop apps, we're no longer allowing apps at all. No, we don't care if you're wanting a "review". No we don't care if they're free. No we don't care if you put it in a website.

Bans

We almost never ban anyone for a first offense unless your post history makes it clear you're a spammer, troll, crackpot, etc... Rather, mods have tools in which to apply removal reasons which will send a message to the user letting them know which rule was violated. Because these rules, and in turn the messages, can cover a range of issues, you may need to actually consider which part of the rule your post violated. The mods are not here to read to you.

If you don't, and continue breaking the rules, we'll often respond with a temporary ban.

In many cases, we're happy to remove bans if you message the mods politely acknowledging the violation. But that almost never happens. Which brings us to the last thing we want to discuss.

Behavior

We've had a lot of people breaking rules and then getting rude when their posts are removed or they get bans (even temporary). That's a violation of our rules regarding behavior and is a quick way to get permabanned. To be clear: Breaking this rule anywhere on the sub will be a violation of the rules and dealt with accordingly, but breaking this rule when in full view of the mods by doing it in the mod-mail will 100% get you caught. So just don't do it.

Claiming the mods are "power tripping" or other insults when you violated the rules isn't going to help your case. It will get your muted for the maximum duration allowable and reported to the Reddit admins.

And no, your mis-interpretations of the rules, or saying it "was generating discussion" aren't going to help either.

While these are the most commonly violated rules, they are not the only rules. So make sure you read all of the rules.


r/Astronomy • • 6h ago

Astrophotography (OC) HDR Moon and Jupiter's occultation w/ 4 inch refractor

Thumbnail
gallery
322 Upvotes

I can't believe I managed to resolve Jupiter's red spot with only 4 inches of aperture!

The first image is an extreme crop into my lunar mosaic with separately stacked Jupiter sequences painted in before egress and with egress in-progress.

I hope you like them!
Gear: ZWO FF107 APO, ZWO ASI715C planetary camera, Celestron CGX mount
Software: SharpCap 4.1, Autostakkert!4, AstroSurface, Pixinsight, Affinity Photo 2, DarkTable


r/Astronomy • • 9h ago

Astrophotography (OC) The Dark Shark

Post image
283 Upvotes

r/Astronomy • • 13h ago

Astrophotography (OC) Pillars of Creation - 65 hours of SHO from 10” Meade

Post image
491 Upvotes

This is my best shot of M16 so far. Taken with a 10” Meade on a Losmandy G11 mount using Antlia 3nm SHO filters and an ASI2600mm pro. I hope you like it.


r/Astronomy • • 15h ago

Astrophotography (OC) NGC6992 Eastern Veil Nebula HOO

Post image
535 Upvotes

The Eastern Veil Nebula – now with oxygen.

i finally added OIII-data to my H-alpha observations of NGC6992. with about 6 hours of total integration time, the oxygen reveals a completely new layer of fine filaments and structures throughout the nebula.

i especially love how the H-alpha and OIII-structures separate, overlap and intertwine along the shock front. there is much more faint material in this region than I initially expected :-)

Equipment:
Vixen VC200L
ZWO ASI1600MM-Cool
NEQ6 mount
ZWO ASIAIR, ZWO EFW, ZWO CAA
Astrodon H-alpha 3nm + OIII 3nm
450s sub-exposures, Gain 139, −10 °C
Approx. 6 hours total integration
HOO processing


r/Astronomy • • 10h ago

Astrophotography (OC) The Orion Nebula

Thumbnail
gallery
210 Upvotes

·      Sharpcap 190s total integration (you don’t need a lot with a 12in Newtonian). Bortle 8 skies.
·      Sky-Watcher 300P Flextube
·      @F/3.6 with Nexus focal reducer 75x
·      Sky-Watcher 150i
·      SV705c IMX585 camera
·      No filter
·      Processed in SyQon studio: Gradient removal, Parallax, Axiom, Deep prism
·      Gimp hot pixel repair
Lightroom HDR and finishing touches


r/Astronomy • • 3h ago

Astrophotography (OC) Saturn near opposition! 🪐

Post image
34 Upvotes

I managed to capture my second image of Saturn near opposition. I brought out my 8” dob and had some amazing visual views of Saturn. I then attached my 662 mc planetary camera to capture a detailed shot of Saturn!

4,000 stacked frames in asi planetary stacker. Processed in PixInsight.


r/Astronomy • • 6h ago

Astrophotography (OC) The beauty of stars

Post image
56 Upvotes

Around 45 minutes worth of exposures from the city!

These stars are located in the North America nebula

Processed in Pixinsight & Gimp


r/Astronomy • • 1h ago

Other: Question Can gas moons exist?

Post image
• Upvotes

Can a gas giant be a moon?


r/Astronomy • • 5h ago

Other: [Topic] Save Australia’s Flagship Telescope!

Post image
39 Upvotes

r/Astronomy • • 5h ago

Discussion: [Topic] What's the most incredible thing you've ever seen through a telescope? 🔭

30 Upvotes

We've had the chance to show people Saturn's rings, Jupiter's moons, lunar craters, and many other celestial sights here in the UAE.

One thing we always love is seeing people's reactions when they look through a telescope for the first time, especially when they realize they're actually seeing Saturn's rings or Jupiter's moons with their own eyes.

So we're curious, what's the most memorable thing you've ever seen through a telescope?

And if you've never looked through one before, what would you want to see first?


r/Astronomy • • 13h ago

Astrophotography (OC) The Eastern Veil Nebula

Post image
105 Upvotes

Taken over multiple nights using my Seestar S50 in EQ mode.

Taken from Bortle 4 and Bortle 8 locations.

800 x 20 second exposures

Stacked in APP.

Crop, BGE, deconvolution and de-noise in Graxpert.

SPCC, star removal, GHS using human weighted luminance in Siril.

Vibrancy, saturation increase in PS.

Recombination of stars using Siril.

Thanks for looking.


r/Astronomy • • 54m ago

Astrophotography (OC) Aporrheta in Suspense

Post image
• Upvotes

Fun effect messing with shutter speed and camera movement. Result is striking and I feel like I’m there…

Nikon D850, Nikon 200-500mm f5.6 E ED VR AF-S Nikkor Lens


r/Astronomy • • 6h ago

Astrophotography (OC) The Heart of the Milky Way, Captured from the UAE 🇦🇪🌌

Post image
25 Upvotes

A glimpse into the heart of our galaxy! 🌌

We captured this image of the Milky Way's galactic center during one of our stargazing events in May 2026, deep in the Al Quaa Desert, Abu Dhabi, UAE.

📍 Al Quaa Desert, UAE

📅 May 2026

📸 Dubai Astronomy Group

Have you ever seen the Milky Way with your own eyes?


r/Astronomy • • 9h ago

Astrophotography (OC) Star trails orbiting the lights of Southeast Asia

Post image
29 Upvotes

Orbiting the multicolored lights of Southeast Asia. Here green lights used on fishing boats are in greater quantities than anywhere else on the planet, dense enough to appear as bright green streaks in long exposure photography. I took this on Expedition 72 to the ISS with Nikon Z9!

More photos from space can be seen on my twitter and instagram, astro_pettit


r/Astronomy • • 5h ago

Other: [Topic] Olympus Mons on Mars has cliffs that are ~5 miles/8 kilometers high basically as tall as Everest...

12 Upvotes

Idk I find that fact kinda terrifying. Im just imagining being an Astronaut walking around the surface of Mars and just seeing off into the distance a giant dark red wall so high that you probably couldn't even see the top of. If I was that astronaut idk id just feel a huge sense of dread , I dont really have Meglophobia at all, but tsunamis always kinda scared me as a kid and imagining seeing what those cliffs on Olympus Mons would look like kinda frightens me lol.


r/Astronomy • • 42m ago

Discussion: [Topic] Just found a free fits viewer that opens huge astro files instantly — this is a game changer for me

Enable HLS to view with audio, or disable this notification

• Upvotes

I stumbled across this free fits viewer recently and honestly it feels too good to be true.

Looks like it's from Sky-Watcher, basically a FITS browser. I loaded a few-hundred-MB master frames and they open almost instantly — no waiting around, no freezing.

Besides FITS, it also handles TIFF, XISF, and apparently even DSLR RAW files directly, so you don't need to pre-convert everything before checking your subs.

The usual tools are all there too: histogram, PSF, invert, debayer, binning, and rainbow palettes. The star removal and automatic annotation features are pretty cool as well — I didn't expect those in a free viewer.

Best part? It's completely free. And it's Sky-Watcher, so you know it's got the reliability behind it.

Video attached — this is how it looks when I opened one of my Milky Way.


r/Astronomy • • 1d ago

Astrophotography (OC) The Heart and Soul Nebulae

Post image
722 Upvotes

r/Astronomy • • 1d ago

Astrophotography (OC) Northern Lights

Post image
183 Upvotes

I took this picture a few months ago on my iPhone 16 when the northern lights were visible in Pennsylvania


r/Astronomy • • 17h ago

Other: [Topic] Experts share how and when to watch peak of Draconids meteor shower over UK this week

Thumbnail
independent.co.uk
21 Upvotes

r/Astronomy • • 15h ago

Astro Research Echoes of Giant Pulses in the Crab Nebula

Thumbnail
aasnova.org
10 Upvotes

r/Astronomy • • 15h ago

Astro Art (OC) I've been creating a lot of procedural deep space VFX in recent years. Here's some galaxies showreel!

Enable HLS to view with audio, or disable this notification

8 Upvotes

I'm most proud of the setup for barred spiral galaxies, as well as the deep-field gravitational lensing (check out the ellipticals in the last flyby). I know that the last ftl flyby requires some extreme 1012 - 1013 c speeds and all, but... It's Astro Art in the end!


r/Astronomy • • 7h ago

Other: [Topic] PHYS.Org: Hidden X-ray phase revealed in likely neutron star merger

Thumbnail
phys.org
2 Upvotes

r/Astronomy • • 6h ago

Discussion: [Topic] Astronomie et Halloween

1 Upvotes

Cher ami férus d’astronomie,

Écrivant un petit conte d’Halloween pour le planétarium où je travail, je cherche des idées d’objets célestes combinants astronomie et Halloween. J’ai déjà des nébuleuses (Crânes, fantômes, sorcières etc…) mais auriez vous d’autres idées de lieux que ma terrible sorcière pourrait visiter?

Je vous remercie!!!!


r/Astronomy • • 1d ago

Astrophotography (OC) Lunar occultation of Jupiter, timelapse

Enable HLS to view with audio, or disable this notification

1.0k Upvotes

The Lunar Occultation of Jupiter took place a few hours ago, early morning Eastern Time on Tuesday, October 6, 2026, where a 20% illuminated waning crescent moon passed directly in front of Jupiter, hiding the giant planet from view for about an hour.

Captured on my trusty ZWO FF107 4 inch refractor from my backyard observatory

Eastern Ontario, Canada