Awesome shot of a Philadelphia UFO?

Phillybits: “Subterranean UFO”.

I’ve walked by this a few times over the years. Always surprises.

Missed: Astronomy Picture of the Day was Ten Years Old June 16th

Check the thread at MetaFilter. Thank you for ten years of thought provoking, inspiring, and horizon expanding photos. My favorite source of wallpaper too.

Great desktop wallpaper

Check out the site suggestions thread at Ask MetaFilter.

Me? Mine is almost always from the Astronomy Picture of the Day.