It's Jerusalem Day:

http://en.wikipedia.org/wiki/Jerusalem_Day

Space Shuttle Endeavor is heading home this morning:

http://www.huffingtonpost.com/2011/05/31/space-shuttle-endeavour-landing-nasa-tv_n_869440.html

Rare midnight solar eclipse tonight:

http://www.foxnews.com/scitech/2011/05/31/article-rare-triple-sky-treat-lunar-solar-eclipses-june-july/?test=faces

Unusual planetary alignment of four planets and the moon:

http://www.msnbc.msn.com/id/43197198/ns/technology_and_science-space/

Potential hazardous meteor passing within 0.9 LD of Earth tonight:

http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2009%20BD&orb=1

Chance for M-Class flares due to increase in sunspot activity:

http://www.swpc.noaa.gov/forecast.html