Why was this thread closed?

[astro]

Tried to respond with some useful info and this GQ thread was locked. No moderator note either. Odd.

http://boards.straightdope.com/sdmb/showthread.php?s=&threadid=118570

[Arnold_Winkelried]

Did you, perchance, look around to see if it was a duplicate thread?

[KneadToKnow]

http://boards.straightdope.com/sdmb/showthread.php?s=&threadid=118569