KStars

KStars is free, open source, cross-platform astronomy software. It provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time.

Features:
+ The display includes up to 100 million stars with addon catalogs.
+ 13,000 deep-sky objects,all 8 planets, the Sun and Moon.
+ Thousands of comets, asteroids, supernovae, and satellites.
+ Sky map moves where you are pointing so you can identify stars, planets, and constellations easily.
+ Adjustable simulation speeds in order to view phenomena that happen over long timescales.
+ Select from different projection systems and color schemes.
+ Several Field-Of-View (FOV) indicators from Telrad to Hubble Space Telescope!
+ Search for any object in existing catalog, and if not found KStars search for it online.
+ INDI Support: Complete INDI support! KStars Lite can connect to your astronomical equipment and can control telescopes, CCDs, DSLRs, focusers, filter wheels, domes, and your whole observatory!

Please report any issues to http://bugs.kde.org