If you have never been impressed by the Hubble Space Telescope, then you've never seen this site.

Pondering the cosmos is something cerebral that is as infinite as the imagination. Still, if you would like some concrete tools to assist in the process of seeding the imagination, then look no further than KStars. KStars is a Desktop Planetarium for your computer. It provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time. The display includes 130,000 stars, 13,000 deep-sky objects, all 8 planets, the Sun and Moon, and thousands of comets and asteroids. KStars is free software.