The famous Ring Nebula in the Lyra (M57 or NGC 6720) is a planetary nebula. All details in http://www.astrocruise.com/m57.htm
lyra
lyra
M57 is short for Messier 57. It is commonly known as the Ring Nebula, and it is part of the constellation Lyra.
Lyra Lyra
logitude hours of lyra
There is no such thing as a "ruler of a constellation".
Lyra is a constellation not a star
Vega is the brightest star in the constellation Lyra
Lyra
lyra
Lyra.
The Cat's Eye Nebula appears in the constellation of Draco.