1 moon
2 Carbon dioxide
3 Sulfuric
4 Mariner
5 Venera
6 Nitrogen
7 Ishtar Terra
8 Aphrodite Terra
9 Maxwell Montes
10 Volcanic
11 Isothermal
12 Magellan
13 Akatsuki
14 Circular
15 Retrograde
16 Anticlockwise
17 Venus Express
18 Neith
19 Ptolemy
20 Lomonosov
21 Pioneer
