Lacerta is a constellation located in the northern sky. Its name means "the lizard" in Latin, and it was first introduced by the astronomer Johannes Hevelius in the 17th century. The constellation is relatively small and is best known for its bright star, Alpha Lacertae, which is a blue-white star located about 100 light-years from Earth. Lacerta is bordered by several other constellations, including Cygnus, Andromeda, and Pegasus. It contains a few notable deep-sky objects, such as the Lacerta Nebula, which is a region of star formation. The constellation is best visible in the autumn months in the northern hemisphere.