Comet Siding Spring and 47 Tucanae encounter
Imaged here is the close encounter of comet Siding Spring C/2013 A1 with the second largest globular cluster of the sky, 47 Tucanae (NGC 104) that took place the night of August 30th, 2014.
Apo TEC140 (140/f7.2) - FLI Proline 16803 - Comet: L (18x2m) RGB (12x2m each) 47TUC: L (120m) RGB (60m each) - Warrumbungle Observatory, Coonabarabran, NSW, Australia