Hi all; this is SO COOL I HAD to share... this is a link to a pic of all the lights of earth, all at the same time! It's a beautiful sight. Sent to me by a friend from another list who worked for NASA (but THATS a whole other story!) "It is a composite of many orbital passes...within a 24hr orbit with a 90 period you would go into darkness approx. 16 times. Thats 16 sunrises and sunsets in one day." http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg Birdie