I saw this yesterday on Space.com – Tantalizing Pluto views suggest active surface but won’t be seen again for 161 years – https://www.space.com/pluto-fully-illuminated-observation-suggests-active-surface. Much longer article, but here’s what I considered relevant. It has some photos.
By Meghan Bartels June 17, 2021
The scientists have more work to do, with observations scheduled for Saturday.
For a brief moment in time in July 2018, the solar system aligned to show Earth the fully sunlit disk of Pluto, an arrangement that won’t occur again for 161 years.