Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001eaa..booke1815b&link_type=abstract
"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 1815. Bristol: Institute of Physics Publishing, 2001
Astronomy and Astrophysics
Astrophysics
Solar System, Planets And Satellites
Scientific paper
Orbiting the Sun in 164.79 years, at a mean distance of30.06 AU (4.50×109 km), Neptune is the outermost of thefour GIANT PLANETS. Its orbit is nearly circular(eccentricity 0.009) and inclined to the Earth's orbit plane by only1.77°. Neptune's outer atmosphere, like those of the other giantplanets, is composed predominantly of molecular hydrogen and helium with tracesof methane (CH4). Yet Neptune, ...
Bezard Bruno
Murdin Paul
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