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
What Is This Thing Called Love? (Alexander O'Neal song) the United States, the single reached #21 on Billboard's Hot R&B/Hip-Hop Singles & Tracks. Credits are adapted from the album's liner notes. What Is This Thing Called Love? (Alexander O'Neal song) "What Is This Thing Called Love?" is a song written by Jimmy Jam and Terry Lewis and recorded by American recording artist Alexander O'Neal. It is the second single from the singer's fourth solo album, "All True Man" (1991). The song's distinctive backing vocals were performed by Lisa Keith. Following the successful chart performances of the "All True Man" single "All True Man", "What Is This Thing Called Love?"