Hot Jupiter
Videos
Hot Jupiters are a class of gas giant exoplanets that are inferred to be physically similar to Jupiter but that have very short orbital periods. The close proximity to their stars and high surface-atm
An artist's impression of a hot Jupiter orbiting close to its star
Hot Jupiter with hidden water
Comparison of "hot Jupiter" exoplanets (artist concept). From top left to lower right: WASP-12b, Boinayel, WASP-31b, Bocaprins, HD 189733b, Puli, Ditsö̀, Banksia, HAT-P-1b and HD 209458b
Artistic rendering of a puffy planet
Gas giant
Videos
A gas giant is a giant planet composed mainly of hydrogen and helium. There are two gas giants in the Solar System: Jupiter and Saturn. The term "gas giant" was originally synonymous with "giant plane
Hot Jupiter
…Hot Jupiters (sometimes called hot Saturns for less massive objects) are a class of gas giant exoplanets that are inferred to be physically similar to Jupiter (i.e. Jupiter analogues) but that have very short orbital periods (P < 10 days). The…
Artist's impression of the formation of a gas giant around the star HD 100546
![A gas giant exoplanet [right] with the density of a marshmallow has been detected in orbit around a cool red dwarf star [left] by the NASA-funded NEID](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b3/Artist_impression_of_ultra_fluffy_gas_giant_planet_orbiting_a_red_dwarf_star.jpg/500px-Artist_impression_of_ultra_fluffy_gas_giant_planet_orbiting_a_red_dwarf_star.jpg)
A gas giant exoplanet [right] with the density of a marshmallow has been detected in orbit around a cool red dwarf star [left] by the NASA-funded NEID radial-velocity instrument on the 3.5-meter WIYN Telescope at Kitt Peak National Observatory.
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