A friend just sent this to me this morning and I thought it was very nicely done and quite informative.
I hope is hasn't been presented here previously but here it is none-the-less:

http://apod.nasa.gov/apod/ap120731.html

And there is an APOD thread. Though I haven't posted in there for ages.

http://www.datahopa.co.uk/forum/astronomy/apod/60/

I do love the 7 minutes of terror strap line though. We await with bated breath for the 6th of Aug, 6:31 BST (1:31 EST).
I'm not sure but I think this is the time curiosity hits the Martian atmosphere. So we'll know about it 21 mins later.