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
A Planet Called Utopia him land. He promised to stay out of trouble, be responsible, and not make waves. Above all, stay out of the newspaper headlines. If he has to convene press conferences, they should be scripted, and he should not say anything off the cuff, or vaguely likely to make a disturbance. But one step off the spaceship and onto the tarmac, he does the unthinkable, and the government is suddenly plunged into damage control mode before it's too late. A Planet Called Utopia A Planet Called Utopia is a science fiction novel by Scottish writer J. T. McIntosh, first published in