Red Dragon

Revelation

Revelation 12

3 Another sign was seen in heaven there was a great red dragon with seven heads and ten horns, and on his heads were seven royal crowns. 

The Codex Vaticanus

Stars and Constellations

Then another sign appeared in heaven: an enormous red dragon with seven heads and ten horns and seven crowns on its heads.

Numerology

red dragon with seven heads - Revelation 12:1-4