By comparing sizes and distances we can scale our solar system all the way up from the Earth and the Moon, up to our nearest star, and you might be surprised how far that actually is!
Golf ball - Moon Globe - Earth Marbles - Earth/Sun on different scales Red foam ball - Jupiter Card with pin-prick hole - Sun/Solar system on bigger scales
Don't lose your marbles!
For globe earth: Golf Ball moon - at a distance of 4m c=6ms-1
For 2m (roughly demonstrator height) Sun: Earth marble Jupiter ball c=1ms-1 (GUESS!?!)
Sun marble Earth 2m away Jupiter 10m Neptune 60m
Sun 1mm (pin prick hole in card) Neptune 4m Alpha Centauri 29km
Solar System (sun to neptune) 1mm Alpha Centauri 10m