stats : 55 cancri a constellation : cancer star type : g8v - yellow dwarf luminosity : 0.63 l mass : 0.95 m temperature : 5,373 k , 9,211 f radius : 1.15 r age : 7-9 gy planets , in order from closest to farthest : ae - 0.01 au from 55 cancri a , 18 hour orbit , 8 times more mass than earth , temperatures of 2,000 kelvin ( 3,140 fahrenheit ) , one third of this planet is believed to be highly compressed carbon , and most of that is believed to be diamond , this planet has been named lucy ab - 0.11 au from 55 cancri a , 14 day orbit , gas giant , 85 % the mass of jupiter ac - 0.24 au from 55 cancri a , 44 day orbit , gas giant , 50 % the mass of saturn af - 0.78 au from 55 cancri a , 260 day orbit , gas giant , 50 % the mass of saturn ad - 5.77 au from 55 cancri a , 14 year orbit , gas giant , 5 times the mass of jupiter , no solid surface , gravity 10 to 15 times that of earth stats : planet e , lucy orbital distance : 0.01 au orbit : 0.73 days , 0.002 year gravity : 1.8 radius : 2.00 , 12,760 km diameter : 4.00 , 25,520 km mass : 8.63 density : 1.79 composition : carbon and silicates , small metal core land : 56 % ice : 44 % liquid : 0 % moons : 0 , planet is tidally locked planetary resources : precious gems ( diamonds ) length of day : not applicable atmospheric pressure : 0.2 , extremely thin atmospheric radiation , base : lethal level : 1100 atmospheric toxicity : lethal average surface temperature : 1726 c , 3,140 f axial tilt : 4 degrees climate range : no seasons whatsoever , +/- 0 c , 0 f planetary systems : g 163 star : g 163 characteristics : red dwarf star , 33 % the mass of sol , located 49 light years away from earth in dorado constellation planets , in order from closest to farthest : b - 0.06 au from g 163 , 9 day orbit , e - 0.10 au from g 163 , 19 day orbit , c - 0.12 au from g 163 , 25 day orbit , 7 times more mass than earth f - 0.33 au from g 163 , 108 day orbit , d - 1.02 au from g 163 , 601 day orbit , planetary systems : g 581 star : g 581 characteristics : main sequence red dwarf star , 31 % the mass of sol , located 22 light years away from earth in libra constellation stats : g 581 constellation : libra star type : m3v - red dwarf luminosity : 0.013 l mass : 0.31 m temperature : 3,480 k radius : 0.29 r age : 7-11 gy planets , in order from closest to farthest : e - 0.02 au from g 581 , 3 day orbit , 2 times more mass than earth , tidally locked b - 0.04 au from g 581 , 5 day orbit , 16 times more mass than earth , tidally locked c - 0.07 au from g 581 , 13 day orbit , 5.5 times more mass than earth , tidally locked g - 0.14 au from g 581 , 36.5 day orbit , 3 times more mass than earth , tidally locked , gravity is 1.8 times heavier than earth , this planet has an extra dense atmosphere that captures and circulates heat all around the planet ( greenhouse effect ) , this raises the temperature to between 40 and 50 degrees fahrenheit in certain places , site of the colony valhalla d - 0.21 au from g 581 , 67 day orbit , 7 times more mass than earth , possibly formed further away and drifted in closer until it settled into current orbit , site of many asteroid , comet and meteor impacts , tidal heating is too cold to maintain plate tectonics , site of proposed research and mining outpost kuatica f - 0.76 au from g 581 , 433 day orbit , 7 times more mass than earth stats : planet g , valhalla orbital distance : 0.14 au orbit : 36.5 days , 0.10 year gravity : 1.8 radius : 1.51 , 9,634 km diameter : 3.02 , 19,268 km mass : 3.1 density : 1.64 composition : iron-nickel , large metal core land : 42 % ice : 27 % liquid : 31 % moons : 0 , planet is tidally locked planetary resources : high grade minerals length of day : not applicable atmospheric pressure : 1.4 , moderate , near dense atmospheric radiation , base : mild level : 0.8 atmospheric toxicity : trace toxins ( hydrogen ) average surface temperature : -6 c , 21.2 f , on side facing sun axial tilt : 2 degrees climate range : no seasons whatsoever , +/- 0 c , 0 f stats : planet d , kuatica orbital distance : 0.21 au orbit : 66.87 days , 0.18 year gravity : 1.0 radius : 2.2 , 14,036 km diameter : 4.4 , 28,072 km mass : 6.98 density : 0.45 composition : ice mantle , silicate core land : 20 % ice : 64 % liquid : 16 % moons : 9 a gravity : 0.16 diameter : 0.28 , 1,786 km mass : 0.01 b gravity : 2.10 diameter : 0.43 , 2,743 km mass : 0.38 c gravity : 0.66 diameter : 0.35 , 2,233 km mass : 0.08 d gravity : 3.30 diameter : 0.38 , 2,424 km mass : 0.47 e gravity : 0.23 diameter : 0.29 , 1,850 km mass : 0.01 f gravity : 3.03 diameter : 0.31 , 1,977 km mass : 0.29 g gravity : 0.30 diameter : 0.37 , 2,360 km mass : 0.04 h gravity : 2.46 diameter : 0.48 , 3,062 km mass : 0.56 i gravity : 2.76 diameter : 0.44 , 2,807 km mass : 0.53 moon features : due to their electromagnetic composition , several of the heavier moons ( b , d , f , h , i ) produce aurora borealis effects on kuatica planetary resources : high grade metal ore , raw crystals length of day : 112 hours atmospheric pressure : 1.2 , moderate atmospheric radiation , base : mild level : 0.32 atmospheric toxicity : severe toxins ( chlorine , fluorine , hydrogen , others ) average surface temperature : -93 c , -135.4 f axial tilt : 37 degrees climate range : ice planet , violent storms around equator and poles , +/- 20 c , 68 f planetary systems : g 667 star : gj 667 c characteristics : actually a system of three stars , bound by gravity , 22 light years from earth in the scorpius constellation .