Mercury
The smallest planet and the closest to the Sun, seen only low in the twilight and never far from the Sun.
Tonight from
Rise, highest point and set are worked out on your device for the place above.
What it is
- Diameter
- 4,879 km
- Distance from the Sun
- 57.9 million km on average
- A year there lasts
- 88.0 Earth days
- A day there, from noon to noon
- 4,223 hours, about 176 Earth days
- Average temperature
- 167 °C
- Known moons
- None
Figures from NASA Goddard Space Flight Center, NSSDCA fact sheets. All sources