Explore: Mercury Atmosphere

Mercurian atmosphere was contentious until 1974, although by that time a consensus had formed that Mercury, like the Moon, lacked any substantial atmosphere. This

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

1 torr = ⁠1/760⁠ atmosphere = ⁠101325/760⁠ pascals. It is denoted mmHg or mm Hg. Although not an SI unit, the millimetre of mercury is still often encountered

atmospheric stripping. All Solar System planets besides Mercury have substantial atmospheres, as does the dwarf planet Pluto and the moon Titan. The high

pressure at sea level. The standard atmosphere was originally defined as the pressure exerted by a 760 mm column of mercury at 0 °C (32 °F) and standard gravity

⁠1/760⁠ of one atmosphere. This yields a precise definition that is unambiguous and independent of measurements of the density of mercury or the acceleration

("Earth-shaping") is the hypothetical process of deliberately modifying the atmosphere, temperature, surface topography or ecology of a planet, moon, or other

The atmosphere of Earth consists of a layer of mixed gas that is retained by gravity, surrounding the Earth's surface. It contains variable quantities

Mercury's atmosphere has been blasted away by the solar wind. The only moon that has retained a dense atmosphere is Titan. There is a thin atmosphere

Mercury-Atlas 6 (MA-6) was the first crewed American orbital spaceflight, which took place on February 20, 1962. Piloted by astronaut John Glenn and operated