Brightening would imply that the lighted-up side of an orbiting object is facing the earth , as when sunshine reflects off the moon .
发亮，可能说明沿轨道运行的天体亮面正对着地球，就像月亮反射阳光那样。
That 's because the backward rotation puts more space between the black hole and the orbiting matter , leaving more room for magnetic fields to build up , the study authors say .
