Hubble and Ground Observations of a Black Hole Magnifying Light from a Background Star (This is how black holes are discovered!) http://oposite.stsci.edu/pubinfo/pr/2000/03/content/0003w.jpg
A Black Hole's Signature (The spectrum of light streaking around the black hole as a result of the strong gravitational field caused by the black hole) (From "Amazing Space") http://amazing-space.stsci.edu/blackholes/lesson/explain/graphics/stis.jpg
Hubble Image of Gas Jets' Spectrum Moving Near the Black Hole (The gas jets near the black hole travel at nearly the speed of light!) http://amazing-space.stsci.edu/blackholes/lesson/explain/graphics/firework.jpg
An Einstein Ring (As you approach the black hole from a close distance, ring after ring of stars you leave behind you will appear as doubles!) (From a paper by Robert Nemiroff of NASA) http://antwrp.gsfc.nasa.gov/htmltest/gifcity/fig2e.gif
An Einstein Ring Again (From a different angle!)(From Nemiroff/NASA) http://antwrp.gsfc.nasa.gov/htmltest/gifcity/fig2f.gif
The Einstein Ring After You've Rotated Around It (From Nemiroff/NASA) http://antwrp.gsfc.nasa.gov/htmltest/gifcity/fig2j.gif
The Shrinking Disk of the Sky (As you fall through the photon layer, the visible sky seems to shrink into a disk behind you! You are crossing the Event Horizon at this point--and will become fairly invisible forever to any outside observers!)(From Nemiroff/NASA) http://antwrp.gsfc.nasa.gov/htmltest/gifcity/fig2o.gif
The Disk of the Sky Grows Still Smaller (From Nemiroff/NASA) http://antwrp.gsfc.nasa.gov/htmltest/gifcity/fig2p.gif
Close-Up Of a Disturbance at a Black Hole (This is how matter might look falling into it!) (From the University of Illinois' "Spacetime Wrinkles") http://www.ncsa.uiuc.edu/Cyberia/NumRel/Images/DistortedBH3_tn.jpg
A theory of gravity is essential to understanding black holes. Learn more about gravity aand anti-gravity. Anti-gravity was important in the "Star Wars" series. http://en.wikipedia.org/wiki/Anti-gravity
Don't forget to take the trip to a black hole! (Written version!) http://www.teacherweb.com/FL/Cocoa/CEWhitehead/h2.stm