What are some alternatives?
When comparing SkyORB and NASA App, you can also consider the following products
Stellarium - Stellarium is a free open source planetarium for your computer.
Rocket Watch - A new way to watch rocket launches live 🚀
KStars - KStars is a Desktop Planetarium for KDE.
Star Chart - Stellarium is a planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free. Read more about Star Chart.
Sky Map - Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...
Code NASA - 253 NASA open source software projects