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  1. Mercury Facts - Science@NASA

    Apr 25, 2025 · Mercury's surface temperatures are both extremely hot and cold. Because the planet is so close to the Sun, day temperatures can reach highs of 800°F (430°C). Without an …

  2. Mercury Facts | Mercury Size | Mercury Planet Color | How Big Is ...

    Dec 24, 2025 · The temperature of Mercury’s surface varies more than on any other planet in our Solar System. It can range from −173 °C (−280 °F) at night to 427 °C (800 °F) during the day.

  3. Mercury (planet) - Wikipedia

    Combined with its high orbital eccentricity, the planet's surface has widely varying sunlight intensity and temperature, with the equatorial regions ranging from −170 °C (−270 °F) at night …

  4. Small and full of extremes – how heat and cold affect Mercury

    Feb 12, 2025 · On Mercury, temperatures range from 430 degrees Celsius in the day to minus 170 degrees Celsius at night – the greatest difference of any planet in the Solar System.

  5. Mercury, world of extremes | The Planetary Society

    Mercury is the closest planet to the Sun, with surface temperatures of up to 430°C (800°F), but Venus is still hotter. Like the Moon, Mercury has water ice in craters at its poles that almost …

  6. How hot is Mercury? - Cool Cosmos

    Since Mercury is the closest planet to the Sun, spins slowly, and does not have much of an atmosphere to trap heat, its temperature varies greatly. Mercury's temperatures can go …

  7. Planet Mercury - Natural History Museum

    How hot is Mercury? Mercury's sun-facing side is scorched by temperatures of around 430°C, hot enough to melt lead. Without a substantial atmosphere to distribute heat away from the areas …

  8. Mercury - Innermost Planet, Smallest, Hot | Britannica

    6 days ago · Mercury - Innermost Planet, Smallest, Hot: Mercury is an extreme planet in several respects. Because of its nearness to the Sun—its average orbital distance is 58 million km (36 …

  9. Mercury Planet Facts - Science Notes and Projects

    Mar 26, 2024 · One of Mercury’s most fascinating aspects is its extreme temperature fluctuations. During the day, temperatures soar to 427 °C (800 °F), making it incredibly hot.

  10. What is the Average Surface Temperature of Mercury?

    Apr 24, 2017 · Overall, Mercury experiences considerable variations in temperatures, ranging from the extremely hot to the extremely cold. All of this arises from the fact that Mercury has …