Neptune

As you travel southwards on the former railway track between York and Selby there are markers showing the relative positions of the planets in the solar system. Mercury, Venus and Mars are close together then it's a long way out to Jupiter, Saturn, Uranus and Neptune. I think Pluto, the most distant one, is no longer recognised as a planet?

S's brother A was our host. I'm the one with binoculars always round my neck.