| Hint | Answer | % Correct |
|---|---|---|
| This planet has a density lower than water | Saturn | 98%
|
| Has the shortest day of any major planet in the Solar System | Jupiter | 96%
|
| Boasts the Solar System's tallest known mountain | Mars | 96%
|
| Has been demoted to dwarf planet status | Pluto | 96%
|
| Has a number of moons named for Shakespearian characters | Uranus | 96%
|
| The hottest planet, with a mean surface temperature of 462 °C | Venus | 91%
|
| Its core comprises approximately 75% of the entire planet | Mercury | 82%
|
| Is approximately 4.5 billion years old | Sun | 73%
|
| Largest moon in the Solar System | Ganymede | 64%
|
| The only known natural satellite to have a dense atmosphere | Titan | 55%
|
| Returns to Earth's skies approximately every 76 years | Halley's Comet | 52%
|
| Is mutually tide-locked with the above | Charon | 48%
|
| Has the smoothest surface of any known solid object in the Solar System, suggesting it may have a liquid water ocean | Europa | 48%
|
| Region extending out from the orbit of Neptune containing a number of known dwarf planets | Kuiper Belt | 38%
|
| The only large natural satellite with a retrograde orbit | Triton | 38%
|
| Two moons named after the twin Greek gods of fear and panic | Phobos and Deimos | 36%
|
| Known for its geyser-like jets of icy particles | Enceladus | 29%
|
| Moon known for its resemblance to a Star Wars death star | Mimas | 29%
|
| Name of the succesful mission to land a probe on a comet | Rosetta | 9%
|
| Minor planet discovered in 1986, sometimes described as Earth's second moon | Cruithne | 4%
|