Looming in the sky...

I'm trying to work out how big Jupiter looks in the sky from its moons - I make it about an 8 degree disk when viewed from Ganymede, compared to our moon at about half a degree. Does this sound plausible? Or has someone calculated this properly somewhere?

Oh joy...

...I appear to have mice. Noticed something out of the corner of my eye while I was eating supper in the kitchen, moving behind a basket containing boxes of washing machine tablets etc., moved the basket, and a mouse ran out and dived down behind the dishwasher.

I suspect that it's come up from the flat below - they've had a new central heating boiler put in today, with lots of noise and drilling etc., maybe it disturbed a nest. Or maybe I've had them for a while and just haven't noticed.

Fortunately there isn't any accessible food, I hope - I tend to keep packets etc. in a wall cupboard, and right now the only food that isn't in there or the fridge are a few onions and potatoes and a bowl of apples, which I'd better cover.

Tomorrow I'll start off by cleaning the kitchen, then I suppose I'd better go out and buy some traps etc., and get used to checking them occasionally, and being more careful about crumbs etc.

It's not exactly the first time, this is a Victorian house so mice etc. sort of come with the territory, but it's a bit of a nuisance.

And before heliograph asks, I don't intend to let the snakes out to chase the mice. I don't think anyone in this country sells snake-traps...