Mercury.
first planet from the Solar System and smallest among all, tellurian and with extreme temperatures

BepiColombo’s Thruster Glitch Leads To Close Encounter With Mercury, Captures Stunning Images
Mercury is receding into the distance in this image taken by the ESA/JAXA BepiColombo mission. ESA/BEPICOLOMBO/MTM VIA SWNS “> A thruster problem has meant a spaceship has passed incredibly close by Mercury – and taken…
Reporting · 1 source · Jul 1, 2026Read itThe journal
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About Mercury
Mercury is the first planet from the Sun and the smallest in the Solar System. It is a rocky planet with a trace atmosphere and a surface gravity slightly lower than that of Mars. The surface of Mercury is similar to Earth's Moon, being cratered, with an expansive rupes system generated from thrust faults, and bright ray systems, formed by ejecta. Its largest crater, Caloris Planitia, has a diameter of 1,550 km (960 mi), which is about one-third the diameter of the planet. Being the most inferior orbiting planet, it always appears close to the Sun in Earth's sky, as either a "morning star" or an "evening star". It is the planet with the highest delta-v required for travel from Earth, as well as to and from the other planets in the Solar System.
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