Military-grade night vision technology might be more suitable for viewing dark sky objects like galaxies and nebulae. These monoculars are much more expensive and use image intensifier tubes.

Astrophotography Shot of the Month: ISS and satellites Multiple exposure of two-second images taken over a 30 minute period showing the satellites in a summer's night sky.

The best smart binoculars identify a wide range of night sky objects, landscapes and animals. They're a pricier than regular binoculars but Prime Day could see them plunge in price.

(Image credit: Juan Maria Coy Vergara via Getty Images) A rare double solar eruption fueled a spectacular display of the northern lights overnight — and more auroras could be on the way.