Name The Year: Jeff Goldblum, actor (The Fly, Silverado, Buckaroo Bonzai, ID4), born.?

Questions

in football, what are the white marks intersecting each five-yard line?

in football, where are the hashmarks?

in greek mythology who did athena turn into a spider?

in greek mythology who ferries the dead across the river styx?

in greek mythology who placed callisto in the heavens as the constellation of ursa major?