Which of these completes its orbits in a much shorter space of time?

Mercury completes its orbits in a much shorter space of time compared to the other planets. Mercury is the planet closest to the Sun in our solar system and has a much smaller orbit than the other planets. As a result, it takes much less time for Mercury to complete one orbit around the Sun compared to the other planets. This means that a year on Mercury is much shorter than a year on Earth, which takes 365.25 days to complete one orbit around the Sun. In contrast, a year on Mercury is just 88 Earth days long, which is much shorter than the other planets in our solar system.