| Planet | Added | Removed | % Correct |
|---|---|---|---|
| Pluto | 1930 | 2006 | 97%
|
| Mars | Antiquity | 95%
| |
| Mercury | Antiquity | 95%
| |
| Earth | ~1700 | 92%
| |
| Uranus | 1781 | 92%
| |
| Venus | Antiquity | 92%
| |
| Neptune | 1846 | 90%
| |
| Saturn | Antiquity | 90%
| |
| Jupiter | Antiquity | 87%
| |
| Sol | Antiquity | ~1700 | 79%
|
| Luna | Antiquity | ~1700 | 77%
|
| Ceres | 1801 | 1850s | 64%
|
| Io | 1610 | ~1700 | 54%
|
| Europa | 1610 | ~1700 | 46%
|
| Ganymede | 1610 | ~1700 | 46%
|
| Eris | 2005 | 2006 | 44%
|
| Titan | 1655 | ~1700 | 44%
|
| Makemake | 2005 | 2006 | 41%
|
| Callisto | 1610 | ~1700 | 36%
|
| Haumea | 2004 | 2006 | 28%
|
| Juno | 1804 | 1850s | 23%
|
| Sedna | 2003 | 2006 | 23%
|
| Vesta | 1807 | 1850s | 23%
|
| Rhea | 1672 | ~1700 | 21%
|
| Pallas | 1802 | 1850s | 18%
|
| Dione | 1684 | ~1700 | 15%
|
| Iapetus | 1671 | ~1700 | 15%
|
| Quaoar | 2002 | 2006 | 13%
|
| Tethys | 1684 | ~1700 | 13%
|