Try Sky Map app. It's fun to go on a walk when the sky is clear and identify constellations and planets. It was originally made by Google, then open sourced in

Try Sky Map app. It's fun to go on a walk when the sky is clear and identify constellations and planets. It was originally made by Google, then open sourced in 2012. https://github.com/sky-map-team/stardroid https://github.com/sky-map-team/stardroid