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.

Like monarchs, Bogong moths use the Earth’s magnetic field for their long journey. They combine the magnetic compass with visual cues or markers, though researchers did not know what these were.

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.