1 “... of unparalleled scientific data from the solar system’s most exotic planet, the ringed, gas giant, Saturn. Larger...”

2 “.... MESSENGER encounters the planet Mercury four times, culminating with an insertion into orbit on 18 March...”

3 “...For almost three decades since Mariner 2 flew by the planet in December 1962, Venus has been...”

4 “...Mars sits very exposed to the solar wind and, because it is a small planet, has but a weak hold...”

5 “...Mars, the most habitable of our sister planets, holds a special place in our imaginations...”

6 “...The exploration of the planets is the modem counterpart to the exploration voy­ ages of old...”