High optical quality is also important, more so than for binoculars that are used on daytime scenes.
For astronomy, the larger the front lenses the better. High optical quality is also important, more so than for binoculars that are used on daytime scenes. Modern image-stabilized binoculars are a tremendous boon for astronomy (though expensive), but any binoculars that are already knocking around the back of your closet are enough to launch an amateur-astronomy career.