I've converted astronomical distances into hypothetical travel times, reckoning that a car goes at about 100 kph, and the Apollo missions took four days to reach the moon, which works out to about 4,000 kph. The speed of light (1,079,252,849 kph) is a very long way beyond anything we can achieve today.
| Journey | By car | By Apollo | Light speed |
| Leave Earth's atmosphere | 11 hours | 17 minutes | - |
| Earth to Moon | 5 months | 4 days | 1 second |
| Earth to Mars (at nearest) | 63 years | 2 years | 3 minutes |
| Earth to Sun | 171 years | 4 years | 8 minutes |
| Earth to Neptune (at nearest) | 4,920 years | 123 years | 4 hours |
| Earth to nearest star (Proxima Centauri) | 46,000,000 years | 1,000,000 years | 4 years |
| Earth to centre of galaxy | 300,000,000,000 years | 8,000,000,000 years | 30,000 years |
| Earth to Andromeda galaxy | don't even think about it | 2,000,000 years | |