If you are in a region in which it can be seen at all, Perseus will touch the horizon at some time (when it rises and sets).
the horizon
No, Perseus is not the son Poseidon. Perseus was the son of Zeus.
Definitely not- she was Perseus' wife. The mother of Perseus was Danae.
What is Perseus duties
Perseus was Greek.
Perseus had no siblings
Bellerophon. Perseus did not ride Pegasus. Perseus
Dionysus did not kill Perseus!
The Romans only changed the names of the gods, not the heroes. So Perseus' Roman name is still Perseus.
Polydectes's true motive in sending Perseus to kill Medusa was to get rid of Perseus, hoping that Perseus would not return alive from such a dangerous quest. Polydectes was interested in Perseus's mother, Danae, but wanted Perseus out of the way.
If you're talking about sky as in sky on this planet, then your answer would be the horizon (the point were the ground meets the sky from any vantage point on the surface). Or you could be talking about the atmosphere, which is the boundary between the earth and space and keeps life alive, and air on earth.
Perseus's grandfather is Acrisius.