Skyview. The Skyview app is $3 on iOS and $2 on Android, but both platforms have a free lite version. To use Skyview, just point your device at the sky and you can get started identifying galaxies, stars, constellations, planets -- even the International Space Station.

Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. A shooting star flashes past the Jupiter.