Deep Space: a great interactive web site from Olaf Frohn

I want to mention if you haven't seen it that Olaf Frohn has made a series of interactive charts detailing just about everything about earth's efforts in space exploration so far. This is an impressive collection well worth sharing or book-marking as a reference. Click here to enter the site. The chart below is a copy of one example from the site, but you need to visit to see the amount of detail.  In particular I like the exploration history chart. Great work!

Photonic Space