A link to a Univ. Nebraska - Lincoln online simulator for studying Sun's angle and motion through time. Ability to change observers position on Earth included.
http://astro.unl.edu/naap/motion3/animations/sunmotions.html

Realtime links for a current mission or 3D tour of the solar system.
http://eyes.nasa.gov/index.html As I post this the Mars Science Lab is 33 hours away from entry

We come upon the 100 year anniversary of human discovery of Cosmic Rays and according to this article still ponder their origin
http://www.npr.org/blogs/13.7/2012/07/25/157286520/cosmic-rays-100-years-of-mystery

NASA's nice Hubble site on Black hole overview
http://hubblesite.org/explore_astronomy/black_holes/
* With some external links for further reading, like on quantum mechanics