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Re:Artemis II crew take 'spectacular' image of Earth by layer8 on Friday April 03, 2026 @05:30PM (#47632553)
Before Lightroom it might have looked closer to this: https://images-assets.nasa.gov/image/art002e000193/art002e00...
Re:Artemis II crew take 'spectacular' image of Earth by hannesfur on Friday April 03, 2026 @05:40PM (#47632675)
From the EXIF we can infer that every setting was left at the default. No exposure comp, no contrast, no HSL, no lens correction and a linear tone curve. Just the default Adobe Color profile at 5400K.
Re:Artemis II crew take 'spectacular' image of Earth by divbzero on Friday April 03, 2026 @05:59PM (#47632882)
The photograph appears to show nightime on Earth with just a sliver of daytime. Beyond cities in Iberia and along the coast of Africa, most of what we can see would be reflected light from the Moon? We are just past full moon on April 1.
Re:Artemis II crew take 'spectacular' image of Earth by hparadiz on Friday April 03, 2026 @06:11PM (#47633002)
1/4 exposure time so 250 ms of light. the light is coming from all the light sources in the universe, plus the moon, plus the sun's rays refracting through the atmosphere which happens even at night.

The natural blue light is coming from the oxygen in the atmosphere but it's so overwhelming in that spot that it turns the light pure white. The red/orangish is coming from particulates and the green/red from aurora. My favorite part I think is the very bottom where you can see the blue light taper off and not overwhelm the camera sensor and you can see the aurora with it. I love this photo so much.

Probably my favorite photo ever now.

Re:Artemis II crew take 'spectacular' image of Earth by pdonis on Friday April 03, 2026 @09:15PM (#47634532)
> the light is coming from all the light sources in the universe, plus the moon

And all the others are negligible by many orders of magnitude compared to the moon. So it's really just the moon as far as this photo is concerned (except for the small sliver that's still illuminated by sunlight, including refracted sunlight).

Re:Artemis II crew take 'spectacular' image of Earth by vasco on Saturday April 04, 2026 @02:35AM (#47636458)
> the light is coming from all the light sources in the universe,

That's highly incorrect. I have many lightsources that aren't contributing to any photons in that picture. For example my refrigerator light.

Re:Artemis II crew take 'spectacular' image of Earth by Y-bar on Saturday April 04, 2026 @04:17AM (#47637038)
I turn off my refrigerator light after I close the door by reaching in and pushing the button. Don’t you?
Re:Artemis II crew take 'spectacular' image of Earth by functional_dev on Saturday April 04, 2026 @05:52AM (#47637576)
so the atmosphere acts as giant lamp lit from behind by Moon? never thought of it that way
Re:Artemis II crew take 'spectacular' image of Earth by tantalor on Saturday April 04, 2026 @10:01AM (#47639153)
> the light is coming from all the light sources in the universe, plus the moon

This is true for every photo ever taken

Re:Artemis II crew take 'spectacular' image of Earth by tayo42 on Friday April 03, 2026 @06:22PM (#47633113)
That's what the caption the article above says
Re:Artemis II crew take 'spectacular' image of Earth by pdonis on Friday April 03, 2026 @09:14PM (#47634525)
> Beyond cities in Iberia and along the coast of Africa, most of what we can see would be reflected light from the Moon?

Yes, exactly.

Re:Artemis II crew take 'spectacular' image of Earth by deepsun on Friday April 03, 2026 @06:38PM (#47633270)
But that one (art002e000193~large.jpg) is only 287kB. The Lightroom-processed one is 6.2MB. I would expect original to be heavier.
Re:Artemis II crew take 'spectacular' image of Earth by saint_yossarian on Friday April 03, 2026 @07:00PM (#47633444)
The resolutions are different, 1920x1280 vs. 5568x3712.

Also possibly different JPEG quality settings.

Re:Artemis II crew take 'spectacular' image of Earth by Melatonic on Friday April 03, 2026 @07:33PM (#47633729)
Could be the thumbnail / preview image generated alongside the raw
Re:Artemis II crew take 'spectacular' image of Earth by porphyra on Friday April 03, 2026 @06:43PM (#47633306)
The Lightroom one was processed from raw. Also, by brightening it a lot, the noisy high-ISO grain becomes more apparent. Noise is famously incompressible, so it leads to a much larger file size.
Re:Artemis II crew take 'spectacular' image of Earth by thfuran on Friday April 03, 2026 @06:53PM (#47633382)
Brightening the image may make the iso noise easier to see, but it doesn't create it.
Re:Artemis II crew take 'spectacular' image of Earth by miduil on Friday April 03, 2026 @07:40PM (#47633802)
But lossy-codecs job is to utilize psychovisual tricks to discard as much high-frequency information as possible, whilst remaining similar visual effects. If you increase the brightness in RAW and then re-encode the JPEG - more noise is being pulled up in the visual spectrum, therefor less of that information (filesize) is discarded.

For example, if you render Gaussian noise in photopea and export as JPEG 100% quality, it has 9.2MB. If you reduce the exposure by -2 it goes down to 7.8MB. That's partially because more parts of the noise are effectively black pixels, but also I believe because of the earlier mentioned effect.

Re:Artemis II crew take 'spectacular' image of Earth by porphyra on Friday April 03, 2026 @07:34PM (#47633739)
Noise that's easier to see will not be compressed away by the JPEG compression. JPEG is basically just DCT + thresholding. Any higher amplitude noise is going to stay and increase the final file size.

Also, pulling more data from your 14 bit or 16 bit raws results in more noise in the end compared to the straight-out-of-camera 8 bit JPEGs.

Re:Artemis II crew take 'spectacular' image of Earth by godelski on Friday April 03, 2026 @09:08PM (#47634491)
It's not lossless
Re:Artemis II crew take 'spectacular' image of Earth by consumer451 on Friday April 03, 2026 @05:40PM (#47632674)
Might I ask, what was your path to finding this image?
Re:Artemis II crew take 'spectacular' image of Earth by rafram on Friday April 03, 2026 @05:45PM (#47632744)
Re:Artemis II crew take 'spectacular' image of Earth by consumer451 on Friday April 03, 2026 @05:50PM (#47632790)
Thanks so much. Sending this link to my nerdy nephews immediately.
Re:Artemis II crew take 'spectacular' image of Earth by ranie93 on Friday April 03, 2026 @05:57PM (#47632860)
Maybe it’s because I (like many) have experienced taking pictures at night and seeing the grainy result that _this_ image struck me as incredibly realistic.

Almost like I ran the grainy-to-real conversion in my mind and I felt like I was imagining seeing this in person. Beautiful image!

Re:Artemis II crew take 'spectacular' image of Earth by fortyseven on Saturday April 04, 2026 @08:27AM (#47638455)
It's beautiful as these all are, that one is probably my favorite. And as somebody else said it kind of feels more real seeing the grain like that. It's just beautiful. A side we never see quite like this.
Re:Artemis II crew take 'spectacular' image of Earth by jnpnj on Sunday April 05, 2026 @08:15AM (#47648577)