Triton is Neptune´s only sizeable satelite. It is bigger than Pluto but smaller than our moon. Its sports a nitrogen ice layer on its surface and it is suspected to possess a water mantle, besides having gas and dust spewing geysers throughout its surface. It is the farthest big moon populating the giant planets realm.
MEADE 14” LX200, SBIG ST2K. Exposure time: 15 seconds in high resolution.
Image development in CCDops, Maxim DL4 and Adobe Photoshop CS4 Extended