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.

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.

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.