well, as for comments above, light year means both time and distance – when you see a star 1 l.y. from you, you see a one year old pic (=time) and it took one year for the light from this star to get to your eye pupil with speed 300k km/sec plus space curve(approx365x24x60x60x300000km=distance). another thing, unless you wish through Hubble telescope :), when you look up at night you see only the stars of our galaxy, even the Milky Way. they are not so far from us to be so hopeless. yet, what’s important for me here is the idea in this pic of being careful with your childish and naive thoughts in adult life (it’s like taking care of precious things from your childhood as having pleasure of mere watching stars for example and getting rid of dangerous things like when you don’t have experience to know whom you can trust and you just trust everyone). Also, as I remember from our folklore, usually a wish is made upon a falling star and the idea is simple – if you know so well what you want and can make a wish while it’s falling, you’ll have it for sure.