Here the photo of a surprising ring solar eclipse which in the sky on the night of May 21, 2012 inhabitants of Asia and the western United States well could see:
And here is how it looks on the "Sky" screen of the ZET program:
ZET allows to see the unusual heavenly occurrences, such as coverings (eclipse) of planets the Moon, covering of stars asteroids, etc.
Here, for example, photo of an eclipse of Saturn by Moon (http://www.popastro.com/sections/occ/members-obs.htm):
On ZET Sky screen the picture of an event looks as:
Notice that the photo made through a telescope, gives the overturned the image, whereas ZET image - direct, apparently an eye.
Other event: occulting of a star of Pollux (beta Gemini, star size 1.2) by asteroid Pandora (diameter of 66 km, visible diameter 0.04") on April 9, 2002. The eclipse passed a narrow strip through Japan and 4.8 seconds lasted http://uchukan.satsumasendai.jp/data/occult/pandora2002-2.txt
Here is ZET screenshot with calculation of this event for some point on eclipse line:
You can see that Pandora and Pollux ecliptical coordinates are coincide to within a second.
And here extremely rare event: an occulting of Jupiter by Mars which will take place on December 2, 2223:
Also see: http://en.wikipedia.org/wiki/Occultation