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According to the IAU's explicit count, there are eight planets in the Solar System; four terrestrial planets (Mercury, Venus, Earth, and Mars) and four giant planets, which can be divided further into two gas giants (Jupiter and Saturn) and two ice giants (Uranus and Neptune). When excluding the Sun, the four giant planets account for more than ...
Sudarsky's classification of gas giants for the purpose of predicting their appearance based on their temperature was outlined by David Sudarsky and colleagues in the paper Albedo and Reflection Spectra of Extrasolar Giant Planets [1] and expanded on in Theoretical Spectra and Atmospheres of Extrasolar Giant Planets, [2] published before any successful direct or indirect observation of an ...
Neptune's mass of 1.0243 × 10 26 kg [8] is intermediate between Earth and the larger gas giants: it is 17 times that of Earth but just 1/19th that of Jupiter. [ g ] Its gravity at 1 bar is 11.15 m/s 2 , 1.14 times the surface gravity of Earth, [ 71 ] and surpassed only by Jupiter. [ 72 ]
Prior to recent results from the Kepler space observatory, most confirmed planets were gas giants comparable in size to Jupiter or larger because they are most easily detected. However, the planets detected by Kepler are mostly between the size of Neptune and the size of Earth.
K2-33b (also known by its EPIC designation EPIC 205117205.01) is a very young super-Neptune exoplanet, orbiting the pre-main-sequence star K2-33. It was discovered by NASA's Kepler space telescope on its "Second Light" mission. It is located about 453 light-years (139 parsecs) away from Earth in the constellation of Scorpius
The physical properties can influence the atmosphere significantly. A low surface gravity of low-mass brown dwarfs or planetary-mass objects can bring the atmosphere in a chemical disequilibrium. [49] Metallicity can influence the amount of methane in the atmosphere and in the extreme case of WISEA 1810−1010 the methane feature is undetectable.
It is a physical constant that is featured in many fundamental equations in the physical sciences, such as the ideal gas law, the Arrhenius equation, and the Nernst equation. The gas constant is the constant of proportionality that relates the energy scale in physics to the temperature scale and the scale used for amount of substance. Thus, the ...
28978 Ixion (/ ɪ k ˈ s aɪ. ə n /, provisional designation 2001 KX 76) is a large trans-Neptunian object and a possible dwarf planet.It is located in the Kuiper belt, a region of icy objects orbiting beyond Neptune in the outer Solar System.