Comets are “dirty snowballs” of Space which pass close enough to the sun to begin sublimation of their water. this produces multiple tails; a bright one of predominantly water-ice, and sometimes a dimmer ion tail of charged particles. Both point away from the Sun, though the water-ice tail will often feature more of a curve away from the comet’s direction of orbit.
Comet C/2025 K1 (ATLAS) captured with 1 hour exposure on the morning of 31 October, 2025
Comet C/2025 A6 (Lemmon)
Comet C/2022 E3 (ZTF)
Comet Leonard C/2021 A1 passing M3. 90 minutes exposure from early December 2021
Comet C/2020 M3 (ATLAS) passing by Orion’s belt from November 2020. 50min total exposure using a T3i + 50mm f/1.4 USM
Comet C/2020 F3 NEOWISE
Comet 46P from December 2018 using an ASI1600MM-P and a 344mm focal length doublet
Comet 2015 Johnson tracked against the stars from May 2017 using a T3i with a 344mm focal length doublet