Antares is a double star, its companion being a minute green star.

In southern latitudes the companion of Antares may be seen with a good 4-inch, but in our latitudes a larger opening is wanted.

Mr.Dawes once saw the companion of Antares shining alone for seven seconds, the primary being hidden by the moon.

He found that the colour of the secondary is not merely the effect of contrast, but that this small star is really a green sun.
The star [beta] Scorpionis is a fine double, the components 13".1 apart, their magnitudes 2 and 5-1/2, colours white and lilac.

It has been supposed that this pair is only an optical double, but a long time must elapse before a decisive opinion can be pronounced on such a point.
The star [sigma] Scorpionis is a wider but much more difficult double, the smaller component being below the 9th magnitude.