beta

Find β Cassiopei, and imagine a line drawn from it to Polaris, and another line from Polaris to the zenith.

It is now agreed that the β variety is a mixture of the α and γ.

Between α and β Scorpionis the fine nebula 80 M may be looked for.

The change, however, may be due to the variation of β alone.

The movable part was, for instance, a movable wire αβ whose extremities α and β could slide along a fixed wire.