ABSTRACT

The Square of Pegasus is one of the most famous of all the constellations, but for some reason or other the controlling body of world astronomy, the International Astronomical Union, decided to transfer one of its main stars to the adjacent constellation of Andromeda, so that Delta Pegasi became Alpha Andromedae. Andromeda is marked by a chain of stars leading off from Alpheratz in the general direction of Perseus; in order they are Delta, Beta and Gamma. Both Beta and Gamma are orange, and appear as such in the photograph; the colour of Beta, an M-type giant, is the more pronounced of the two. The open cluster NGC 752 not far from Gamma, is rather sparse, but is not hard to identify when binoculars are used. However, the most celebrated object in Andromeda is of course the Great Spiral, M31, close to Nu.