r/atoptics

Daytime 22°!

Daytime 22°!

Due to time of day a circumzenithal arc was also visible with the eye, it is the largest I have seen. It went about 180° around a circle, but I couldn’t take a picture as my camera could not pick it up

u/HairySock6385 — 19 hours ago

A few halos and a tiny fire rainbow today

Got a few pics of these halos and a tiny slice of the circumhorizontal arc but it didn’t show up as good in the pics as it did in person

u/RevolutionaryP369 — 1 day ago
▲ 174 r/atoptics

What’s happening guys??

I just saw the sun today and it looked like this.What’s the reason behind this?

u/Possible-Life362 — 1 day ago
▲ 101 r/atoptics

Circumhorizontal arc showing up in a contrail today, plus 22 degree halo

u/andrea55TP — 2 days ago

Sun dog (parhelion) captured in Melbourne this week!

Was outside and noticed this bright spot sitting at the same height as the sun but way off to the side. Turns out it’s a parhelion (sun dog), caused by ice crystals in the cirrus clouds refracting sunlight. Managed to grab a few shots from different spots before it faded.

u/mayukh291 — 3 days ago
▲ 109 r/atoptics

Beautiful Halo this morning!!

Is this a 22 degree halo? Is the arc and its distance from the sun also roughly equal to the orbit of Mercury as well, someone told me that once it was one of the planets orbits roughly matched. Thanks!

u/Prestigious_Lime7193 — 3 days ago

Halo today.

This is so beautiful to look at. Nature has so many wonderful phenomena. :)

u/sirvoggo — 3 days ago
▲ 115 r/atoptics

My first cloud iridescence!

I saw my first iridescent cloud today! It lasted for about 10 minutes before fading

u/derangedarrow2 — 4 days ago

Formally known as Zenith Day, also known by me as roblox/GTA/The sims day. It happens twice a year in places near the tropics. Look up when it happens in your city so you can see it for yourself!

u/Segundaleydenewtonnn — 4 days ago

Caught a flicker while the sun set over Italy!

It’s very feint but for the briefest second I swear there’s some green in there.

u/SwaggyBo1 — 5 days ago

It was 4 am in the morning and I saw this when I tried to capture the moment (It was not visible with naked eyes)

I used the night mode btw

u/Ok_Praline4888 — 6 days ago
▲ 1.2k r/atoptics+3 crossposts

Weird sky ring above McMurdo station, Antarctica

A colleague at McMurdo Station Antarctica showed me this photo someone took of a ring in the sky. It’s been passed around station. None of us can figure out what it is. Anyone recognize this phenomenon?

Edit: consensus is it’s a smoke/vapor ring. The cold air at McMurdo probably preserved the shape far longer than normal, and sunlight hitting the ice crystals that formed around it caused the glow. Likely from an exhaust stack or vehicle on the base. I didn’t know a ton of details but was caught off guard at first when I saw it. Rumors spread like wildfire here too, so whoever took this… nice.

u/ObliviousGenZ — 10 days ago