| Hint | Answer | % Correct | |
|---|---|---|---|
| E | Earth | 12,742 km | 100%
|
| J | Jupiter | 142,984 km | 100%
|
| N | Neptune | 49,244 km | 100%
|
| S | Saturn | 120,536 km | 100%
|
| S | Sun | 1,392,700 km | 100%
|
| U | Uranus | 51,118 km | 100%
|
| V | Venus | 12,104 km | 100%
|
| M | Mercury | 4,879 km | 98%
|
| M | Mars | 6,779 km | 95%
|
| P | Pluto | 2,388 km | 93%
|
| G | Ganymede | 5,268 km | 88%
|
| T | Titan | 5,152 km | 88%
|
| I | Io | 3,643 km | 80%
|
| M | Moon | 3,475 km | 78%
|
| E | Eris | 2,326 km | 76%
|
| E | Europa | 3,122 km | 76%
|
| T | Triton | 2,705 km | 76%
|
| C | Callisto | 4,810 km | 68%
|
| C | Ceres | 470 km | 66%
|
| M | Makemake | 715 km | 56%
|
| H | Haumea | 798–816 km | 51%
|
| R | Rhea | 764 km | 39%
|
| T | Titania | 789 km | 39%
|
| C | Charon | 606 km | 37%
|
| O | Oberon | 761 km | 29%
|
| S | Sedna | 453 km | 27%
|
| U | Umbriel | 585 km | 27%
|
| A | Ariel | 579 km | 24%
|
| I | Iapetus | 736 km | 24%
|
| G | Gonggong | 615 km | 22%
|
| T | Tethys | 533 km | 20%
|
| Q | Quaoar | 545 km | 17%
|
| D | Dione | 562 km | 15%
|
| O | Orcus | 455 km | 12%
|
| S | Salacia | 419 km | 10%
|