Note to King Lear, 1.2.129

Dragon's Tail; and my nativity was under Ursa Major: —Edmund is referring to the constellations Draco (The Dragon) and Ursa Major (The Great Bear).

Draco Source: The Biggest Secret

Ursa Major (Notes: The tail of the Bear is formed by the handle of the Big Dipper, and the tail of the Dragon can be seen above the Bear.) Source: The Northern Lights Route