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Jump6of 100 · 92 M km from Earth

Mercury: 430 °C by day, −180 °C at night

Mercury goes from 430 °C by day to −180 °C at night, is not the hottest planet and a moon of Jupiter is bigger. Facts with their sources.

Mercury, grey and covered in craters, in a mosaic from the MESSENGER spacecraft
Image: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington · original

Curious facts

  1. 430 °C by day, −180 °C at night

    It is so close to the Sun that its surface reaches 430 °C by day. With almost no atmosphere to hold that heat, it drops to −180 °C at night. 1

  2. And still not the hottest

    The hottest planet is Venus, even though it is farther from the Sun: its thick atmosphere traps the heat. 12

  3. A moon bigger than it

    Ganymede, Jupiter’s largest moon, is bigger than Mercury. In size, not in mass: Mercury weighs more. 3

Mercury in Orbit

In the game, Mercury is jump 6 of the route, 92 M km from Earth. Its logbook card says:

Logbook · Jump 6

No air: 430 °C by day, −180 °C at night

I want to try Orbit Already in the group: download

Two steps with the Google account you use on Play: join the group, then download the test. Google Play can take a while, sometimes more than an hour, before it lets you download it; if you see “Item not found”, wait and try again.

What Orbit is like

Sources

  1. NASA, Mercury Facts. science.nasa.gov/mercury/facts
  2. NASA, Venus Facts. science.nasa.gov/venus/venus-facts
  3. NASA, Ganymede. science.nasa.gov/jupiter/jupiter-moons/ganymede

Checked between 8 and 11 October 2026.

Image: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington · original