Black spheres in the background ?!
by 13lueAngeL translator
I was rather curious to understand why on certain images, we see basically a black sphere where probably something is blocking the background noise I would assume from wavelength recorded ? I don't know... reminds me of a game I used to play as a kid with my bro... Battleships... After quite a few misses, you'd start seeing a hole where only there could possibly be the ship you wanted to hit.... This is oddly reminiscent....
I am just an amateur and not a scientific professional but I thought it was oddly strange and worthy of interest as in Image AWI0002ouu under the DSS2 IR (1.15 μm) at 10 o'clock.
by TED91 moderator
That's just one of the many artifacts you'll see in DD images.
This one is speck of dust on the original photographic glass plate. Like here
For more kinds of artifacts you should check these chat Boards