https://mobile.twitter.com/esa/status/1032522983200436224

The greenish coma of comet 21P/Giacobini-Zinner stands out at the left of this telephoto skyscape spanning over 10 degrees toward the northern constellations Cassiopeia and Perseus. Captured on August 17, […]

https://mobile.twitter.com/esa/status/1032408602202398722

https://mobile.twitter.com/esa/status/1032405690713759744

https://mobile.twitter.com/esa/status/1032398029683220480

https://mobile.twitter.com/esa/status/1032395327129640960