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