📅  最后修改于: 2022-03-11 14:50:11.358000             🧑  作者: Mango
### Solar System Exploration, 1950s – 1960s
- [ ] Mercury
- [x] Venus
- [x] Earth (Orbit/Moon)
- [x] Mars
- [ ] Jupiter
- [ ] Saturn
- [ ] Uranus
- [ ] Neptune
- [ ] Comet Haley