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Exoplanetary Systems
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Proxima Centauri
Number of Planets: 2, Principal Characteristics: Hosts the nearest known exoplanet to the Solar System; one of the planets lies within the habitable zone.
HD 10180
Number of Planets: 7, Principal Characteristics: Likely to have the most packed inner system with a Neptune-like planet as well.
Kepler-11
Number of Planets: 6, Principal Characteristics: Hosts six closely packed planets, with five of them in a very compact configuration.
LHS 1140
Number of Planets: 2, Principal Characteristics: The system includes one planet, LHS 1140 b, in the middle of the habitable zone and is one of the best candidates for atmospheric study.
HD 40307
Number of Planets: 6, Principal Characteristics: The system’s planets range from super-Earths to a potential gas giant, several of which might be within the habitable zone.
WASP-47
Number of Planets: 4, Principal Characteristics: Contains one of the few known hot Jupiters with close planetary companions.
Kepler-90
Number of Planets: 8, Principal Characteristics: This system has a similar number of planets to our solar system, orbiting a sun-like star.
Kepler-62
Number of Planets: 5, Principal Characteristics: Two of the five planets are in the habitable zone and are likely to be water world candidates.
Upsilon Andromedae
Number of Planets: 4, Principal Characteristics: This system has a Jupiter-sized planet in a very tight orbit and others much further away, showcasing the diversity of planetary systems.
GJ 1214
Number of Planets: 1, Principal Characteristics: Hosts a Super-Earth with a thick, gaseous atmosphere, which makes it a significant target for atmospheric studies.
TRAPPIST-1
Number of Planets: 7, Principal Characteristics: All seven are Earth-sized and three are in the habitable zone.
55 Cancri
Number of Planets: 5, Principal Characteristics: The system includes a hot super-Earth and a super-Earth in the habitable zone.
Gliese 667 C
Number of Planets: At least 3, Principal Characteristics: This system contains potentially three habitable-zone super-Earths around a red dwarf star.
K2-18
Number of Planets: 2, Principal Characteristics: The system's principal interest lies in K2-18b, which is in the habitable zone and has water vapor in its atmosphere.
HR 8799
Number of Planets: 4, Principal Characteristics: All four known planets are massive, young gas giants that have been directly imaged.
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