10. Titan (Moon of Saturn) – 5,150 km diameter
![Titan moon list top 20 biggest Solar system objects Titan moon](https://www.the-top-twenty.com/wp-content/uploads/biggest Solar system objects/Titan-moon-list-top-20-biggest-Solar-system-objects.jpg)
9. Ganymede (Moon of Jupiter) – 5,262 km diameter
![Ganymede moon list top 20 biggest Solar system objects Ganymede moon](https://www.the-top-twenty.com/wp-content/uploads/biggest Solar system objects/Ganymede-moon-list-top-20-biggest-Solar-system-objects.jpg)
8. Mars (Planet) – 6,792 km diameter
![Mars list top 20 biggest Solar system objects Mars](https://www.the-top-twenty.com/wp-content/uploads/biggest Solar system objects/Mars-list-top-20-biggest-Solar-system-objects.jpg)
7. Venus (Planet) – 12,104 km diameter
![Venus list top 20 biggest Solar system objects Venus](https://www.the-top-twenty.com/wp-content/uploads/biggest Solar system objects/Venus-list-top-20-biggest-Solar-system-objects.jpg)
6. Earth (Planet) – 12,756 km diameter
![Earth list top 20 biggest Solar system objects Earth](https://www.the-top-twenty.com/wp-content/uploads/biggest Solar system objects/Earth-list-top-20-biggest-Solar-system-objects.jpg)
5. Neptune (Planet) – 49,528 km diameter
![Neptune list top 20 biggest Solar system objects Neptune](https://www.the-top-twenty.com/wp-content/uploads/biggest Solar system objects/Neptune-list-top-20-biggest-Solar-system-objects.jpg)
4. Uranus (Planet) – 51,118 km diameter
![Uranus list top 20 biggest Solar system objects Uranus](https://www.the-top-twenty.com/wp-content/uploads/biggest Solar system objects/Uranus-list-top-20-biggest-Solar-system-objects.jpg)