<blockquote>''The hypothesis advanced is that these companions have been recently ejected (10<sup>7</sup> - 10<sup>8</sup> years ago) from the parent galaxy. It is concluded that they are short-lived and that many are now in the process of expanding and ejecting secondary material.''</blockquote> | <blockquote>''The hypothesis advanced is that these companions have been recently ejected (10<sup>7</sup> - 10<sup>8</sup> years ago) from the parent galaxy. It is concluded that they are short-lived and that many are now in the process of expanding and ejecting secondary material.''</blockquote> |