AstroSidivis

This striking astrophotograph captures Comet C/2023 A3 (Tsuchinshan–ATLAS) in exquisite detail as it sweeps through a star-filled sky. The comet’s brilliant nucleus glows an icy blue-white, surrounded by a faint greenish coma produced by sublimating gases like cyanogen and diatomic carbon. Its dust tail stretches diagonally across the frame, a luminous gray plume that gradually fades into the darkness. Subtle striations reveal the intricate flow of dust and gas sculpted by solar radiation and the solar wind, while variations in brightness hint at the comet’s rotation and outgassing jets. Behind it, a dense field of stars — from warm orange giants to cool blue dwarfs — forms a glittering backdrop that emphasizes the comet’s sheer scale and motion. The image likely captures C/2023 A3 near its brightest phase, when it developed its long, fan-shaped tail and became one of the most anticipated comets of its generation. It’s a portrait of motion, impermanence, and cosmic grace — an icy traveler from the outer solar system burning brilliantly for a fleeting moment before continuing its journey into the void.

Since I have insane comet envy, here's reposting of my shot of C/2023 A3 (Tsuchinshan–ATLAS) from last year. Hopefully I will get to image one of these current comets at the EOM. #comet #astrophotography #astronomy #spacethings #fyp

Sounds just like what someone from the deep state establishment would say 😜

A wide-field night photograph of the Milky Way arching across the sky, with the Cygnus star cloud and its dark dust lanes clearly visible. A small dark-roofed cottage sits in the foreground on a grassy hillside, while the bright star Deneb shines above the galactic band. The image reveals dense star fields, reddish nebula patches, and intricate dark structures cutting through the glowing galactic plane.

Been working for quite some time to get a shot like this one. Loads to luck and planning after an utter failure the previous night. Can finally check this off the list. Captured Cygnus over our holiday rental last night. #astrophotography #space #milkyway

Frost/Nixon would like to have a word.

This is pretty cool. Can't say I've seen this solar data before. What am I looking at and where is it from?

I realize the point here is to showcase that nice board in action, however, what a beautiful Damascus knife!

A graphic showing four different types of street lights ranging from very bad (completely spherical and shining in the sky) to best (covered at the top and only shining on the ground), causing less light pollution.

propaganda i WILL be spreading

dunno if ive said it before, but if i haven't....man i sure love your stuff. Can't wait to see your shop full!

What helio centric studies is Voyager 2 conducting that Voyager 1 isn't? I'm also curious how much funding something like the Voyager program requires at this point? 🤔

this shows a funding cut for voyager 2?

I am always amazed at how heavy my phone is when it hits the top of my foot and ponder how on Earth it can reach terminal velocity so quickly 😂

I really wish they were just a bit longer. I just start getting into an episode and its over.

Summertime Funtime No 8 Photograph by Brian Carson of The Learning Curve Photography

Summertime Funtime No 8.

Running full speed through the fountains at Nathan Phillips Square in Toronto Ontario. 📷

#toronto #streetsoftoronto #photographersofbluesky #photographersunited #blueskyartshow #blackandwhitephotography #originalphotography #streetphotography

'Planet Pirouette'

1,500 images captured by Don Pettit are processed, graded & retimed to create this video footage of the Optimal Propellant Maneuver by ISS on 7th April 2025, music by Stellardrone. Cropped and edited from 8m34s 4k original.

Credit: Don Pettit / ISS / NASA / ESRS / Seán Doran

For now 😭

What's the ruling when a plane emergency landing affects your lie?

I'm looking for help from the astrophotography community with help developing an accessibility script (in pixinsight) for users with color blindness/CVD. The script is designed to assist in visualizing gradients easier to help in processing. If you know anyone. I need testers. @me #astrophotography

Ummmm these are amazing 🤩

Just looks like a case of "orangecatitus". It's not fatal but it is contagious and can lead to absurd behavior.

Ah yes the "track and field grip" before the max controller with turbo buttons 😂

Artist Christopher Doll and his painting of a scene from the beginning of Star Wars. The painting looks better from a distance and needs more work

Got a great start on this painting today, loved seeing so many people show up for a Friday of Space Art. Thank you so much. I’ll continue this one and get into the details, correct some shapes, and get this looking like it’s racing off the screen. Definitely needs some pew-pew bits too

🧵
Here is Earth's rotation realized in an unusual way: using a camera scanning the landscape of Tivoli, Namibia, Bartosz Wojczyński focused on the sky.

He created a timelapse spanning 24 h that has a focal point in the sky rather than on the ground.

➡️ apod.nasa.gov/apod/ap20070...

🔭 🧪 #galactic

this whole picture is a vibe that says "F" glazing 😂

yeah but do you have the matching diamond shotgun modem to go along with it?!

The Salmon Cannon Is A Stroke Of Scientific And Environmental Brilliance The story behind the meme is one of those rare cases where everybody wins.

Definitely ridiculous but not at all stupid. Damming has done a lot of damage to ecosystems over the years and to indigenous peoples that count on salmon. This fixes both problems.

www.forbes.com/sites/starts...

Cat covered in brush

Someone learned a lesson

Love the symmetry of the color in this. 10/10 would place on my desk.

YouTube video by rkrnfan11 Criminal Discounts

youtu.be/wE0s31IODJA?...

#Astrophotography isn't just about gear. Patience and practice are your best tools. And don't forget to ask questions. Others have probably had the same problem you're having. You can learn more at http://astropotamus.com/learn