Something I've never seen before- a planet visible in full detail from another completely unrelated planet. You can see the other planet go behind the sun and back out within a 2-hour period or so.
0.990, RS 8496-928-0-0-10 for anyone interested.
EDIT: An update to yesterday's picture. This is what the second planet looks like from the first planet at their absolute closest point, IIRC the apparent size was something like 2
°45'. It's also close enough to reflect light onto the first planet like a moon
Probably not the most interesting phenomenon in the grand scheme of things but I've been looking for something like this for a while
Katherine / 19 / Using SpaceEngine since 2017
My screen name is ProfessorOfK3ology now, but I can't change it here