It was also a duplicate post, against the forum rules. The proper way is to supply a link to where you posted it first, as follows:
http://hypography.com/forums/astrono...html#post95830
__________________
Who's afraid of the Big Black Hole?????
Go Black Hole! W the Black Hole!


Hasta que el agujero negro nos traga, siempre!
Hypography Forum PITA...... er, Administrator.