AO Cassiopeiae
Encyclopedia
AO Cassiopeiae or AO Cas, one of the biggest known double systems
, is also known as Pearce's Star.
Double star
In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope. This can happen either because the pair forms a binary star, i.e...
, is also known as Pearce's Star.