[maris]

Years ago at a private star party I showed Jupiter and its moons. After everyone had a look I mentioned that very sharp eyed people might be able to see the moons directly and invited people to stare. Finally one person piped up and said "Yes I can see them". I asked "what do you see?" and the answer was three moons above and one below just like in the telescope. I didn't have the heart to point that my small refractor was fitted with a diagonal prism.