Atmosphere of Mercury Atmosphere of Mercury Mercury has a very tenuous and highly variable atmosphere (surface-bound exosphere) containing hydrogen, helium, oxygen, sodium, calcium, potassium and water vapor, with a combined pressure level of about 10 bar (1 nPa). The exospheric species originate either from the Solar wind or from the planetary crust. Solar light pushes the atmospheric gases away from the Sun, creating a comet-like tail behind the planet. The existence of a Mercurian atmosphere had been contentious before 1974, although by that time a consensus had formed that Mercury, like the Moon, lacked any substantial atmosphere. This conclusion was confirmed in 1974
The Outermost House presence on top of a dune overlooking the open Atlantic Ocean gave him the feeling of being aboard a ship. Over time, the structure also came to be known as "The Outermost House." Having spent considerable time on the Cape after completing a magazine assignment called "The Wardens of Cape Cod", about the Coast Guard officers of the Outer Cape, Beston drew up floor plans for a house on the dunes two miles south of the Nauset Coast Guard station in Eastham, Massachusetts. Carpenter Harvey Moore and his crew were the builders. Beston intended to use the cottage as a