this post was submitted on 03 Apr 2026
672 points (99.6% liked)
Space
2294 readers
842 users here now
A community to discuss space & astronomy through a STEM lens
Rules
- Be respectful and inclusive. This means no harassment, hate speech, or trolling.
- Engage in constructive discussions by discussing in good faith.
- Foster a continuous learning environment.
Also keep in mind, mander.xyz's rules on politics
Please keep politics to a minimum. When science is the focus, intersection with politics may be tolerated as long as the discussion is constructive and science remains the focus. As a general rule, political content posted directly to the instanceโs local communities is discouraged and may be removed. You can of course engage in political discussions in non-local communities.
Related Communities
๐ญ Science
- !curiosityrover@lemmy.world
- !earthscience@mander.xyz
- !esa@feddit.nl
- !nasa@lemmy.world
- !perseverancerover@lemmy.world
- !physics@mander.xyz
- !space@beehaw.org
๐ Engineering
๐ Art and Photography
Other Cool Links
founded 3 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
This is on the night side of Earth, so lit only by moonlight. Itโs grain from long exposure.
Wouldn't a long exposure have less grain? Usually it's short exposure and high ISO that results in grain.
They're in a moving spacecraft taking a shot of a rotating object. You can't do too long of an exposure. It's why astrophotographers either have to take lots of individual photos and stack them.
Less grain than a shorter exposure? Absolutely. Due to motion you still have to cap exposure duration to a somewhat small number or you'll start getting light streaking. It would be very interesting to see the exif information for this photo.
Thanks!