Big mammal supports the earth
World is supported by fish or fish-like monster or the earth itself is such a monster
Rainbow is associated with an old woman
Milky Way is the path over which souls travel to the beyond or a path of the funeral procession
Rainbow is a reptile (usually a snake) or (more rare) a fish, or it is related to snake, to its tongue, breath, or to scorpion's tail
Person who counts stars will suffer diseases and misfortunes
Milky Way is a trace of people who spilled on their way something related to agriculture (straw, chaff, hay, more rare flour, peas)
Morning and/or Evening Star is a male personage
The earth is square, the sky is usually round
Rainbow is a road, a bridge or a ladder