Thanks. And Cassini at Saturn, New Horizons on its way to Pluto, Hubble, Chandra, Spitzer, and Planck; STEREO and SDO looking at the Sun, and a host of Earth-o

Thanks. And Cassini at Saturn, New Horizons on its way to Pluto, Hubble, Chandra, Spitzer, and Planck; STEREO and SDO looking at the Sun, and a host of Earth-observing missions (http://science.nasa.gov/earth-science/missions/ http://science.nasa.gov/earth-science/missions/), etc., etc. Some of the comments above are not very well-informed.