You can do all this on a bike, and your cycling speed is proportionally 10 times the speed of light!
This is Route 65 of the National Cycle Network, another disused railway route, so almost entirely traffic free with no hills and as a bonus has a good tarmac surface throughout.
For the purpose of the ride the parts of York that matter are the Railway Station, York Minster, and the River Ouse. All fairly close to the City Centre and easy to find. Even tourists and other strangers to the City will know where these places are.
York remains a chocolate producing city however, producing in the King's Square factory no less than six million bars of KitKat every day.
Turn left here to pass beneath the bridge.
Here is Venus.
Jupiter is about the size of a beach ball.
Note the QR Code on each post, which, if you have a SmartPhone will link you to the Solar System Cycling web site.
There is a price list and a collection box and you are trusted to pay the appropriate amounts and put the money in the box.
What a lovely idea.
Now comes Uranus.
Bearing in mind it's minuscule size and it's great distance from anything else, it's a wonder that they ever found it in the first place.