Stellarium

 

“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. ...”

Stellarium.org

Stellarium Web

W - Stellarium (software)

How do I use Stellarium? A guide to the basics

How to install and use Stellarium astronomy software

[PDF] STELLARIUM FREE Planetarium Program, HEAVENS ABOVE, NASA, Subscriptions, News, Alerts, etc. 

YouTube: Stellarium for Beginners