8/2/2023 0 Comments Open a brinks combination lock![]() Having almost no atmosphere to retain heat, Mercury has surface temperatures that change wildly during the day, ranging from 100 K (−173 ☌ −280 ☏) at night to 700 K (427 ☌ 800 ☏) during sunlight across the equator regions. Mercury has a dynamic magnetic field with a strength about 1% of that of Earth's and has no natural satellites.Īccording to current theories, Mercury may have a solid silicate crust and mantle overlying a solid outer core, a deeper liquid core layer, and a solid inner core. ![]() Despite being the smallest planet in the Solar System with a mean diameter of 4,880 km (3,030 mi), 38% of that of Earth's, Mercury is dense enough to have roughly the same surface gravity as Mars. It is a terrestrial planet with a heavily cratered surface due to the planet having no geological activity and an extremely tenuous atmosphere (called an exosphere). ![]() Mercury is the first planet from the Sun and the smallest planet in the Solar System. ![]()
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