jupiter's atmosphere is hydrogen and helium
111Ocean planet — Illustration of a hypothetical ocean planet with a terrestrial atmosphere and two satellites An ocean planet (also termed a waterworld) is a hypothetical type of planet whose surface is completely covered with an ocean of water. Planetary objects …
112MESSENGER — This article is about the NASA space mission. For other uses, see Messenger. MESSENGER Artist s rendering of MESSENGER orbiting Mercury. Operator NASA / APL Major contractors APL …
113Venus — This article is about the planet. For other uses, see Venus (disambiguation). Venus   …
114Sirius — B redirects here. For other uses of Sirius, see Sirius (disambiguation). For other uses of Sirius B, see Sirius B (disambiguation). Sirius A / B …
115Mars Observer — Artist rendering of Mars Observer in orbit around Mars. Operator NASA / JPL …
116Binary star — For the hip hop group, see Binary Star (band). Hubble image of the …
117Natural satellite habitability — Artist s impression of a hypothetical habitable moon of Upsilon Andromedae d Natural satellite habitability is the measure of a natural satellite s potential to sustain life. The study of natural satellite habitability is important to… …
118Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… …
119Helio — Hidrógeno ← Helio → Litio …
120Planets — Finding Them Outside Our Solar System Generally, due to limitations of science at this time, we can only see extra solar planets that are larger than Jupiter. No optical telescope can see an extra solar planet yet, that will probably occur… …
The writer's dictionary of science fiction, fantasy, horror and mythology
