those stars in the background of that shot are insane.
― scott seward, Wednesday, 25 April 2018 01:09 (six years ago) link
aaactually, those are cosmic rays, according to caek! i thought it was ice.
― Karl Malone, Wednesday, 25 April 2018 01:48 (six years ago) link
er wait, i'm wrong yet again. here's what caek said:
"the foreground things are cosmic rays, which you get on CCDs when the exposures are long. the weird downwards snow/motion effect in the background is from background stars."
― Karl Malone, Wednesday, 25 April 2018 01:52 (six years ago) link
The stars were ID'ed too
Confirmed. The stars in the background behind Comet #67P are in Canis Major: the cluster NGC2362 "falls down" past the limb at top-left; sparse cluster NGC2354 & the star 27CMa are also in the field. Cropped image & ID's from https://t.co/6fHwIUpFwT in next tweet. 1/ https://t.co/SYGBKecKEP— Mark McCaughrean (@markmccaughrean) April 24, 2018
― Elvis Telecom, Wednesday, 25 April 2018 03:04 (six years ago) link
Here's one of the #Rosetta OSIRIS NAC images cropped to remove most of #67P (solution converges much quicker without those "useless" data) & the https://t.co/6fHwIUpFwT ID. The faster-moving streaks are then likely dust close to the spacecraft. Great optical illusion 👍 🛰 2/2 pic.twitter.com/FwqSjL2zBI— Mark McCaughrean (@markmccaughrean) April 24, 2018