Star System Generated (Seed: 1766209806)
Star Details
Spectral Class: K0V
Temperature: 5,200 K
Mass: 0.77 sol
Luminosity: 0.4 lux
Habitable Zone (HZ)
Inner Boundary: 0.6 AU
Outer Boundary: 0.87 AU
Physical Limits
Snow Line: 3.04 AU
Max System Radius: 17.5 AU
Planetary System (9 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 1.02 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 0.24
Radius: 0.57
Gravity: 0.74 G
Time & Orbit
Eccentricity (e): 0.136
Orbit Range: 0.88 AU - 1.16 AU
Year: 429 Days
Day: 29.9 Hours
Environment
Temp: -49 °C
Axial Tilt: 27.3 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (1)
Outer Limit: 56,513,316 km
- M1: 33,660 km (0.109 R)
Planet 2 - Terrestrial
Semi-Major Axis: 1.99 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 2.47
Radius: 1.44
Gravity: 1.19 G
Time & Orbit
Eccentricity (e): 0.025
Orbit Range: 1.94 AU - 2.04 AU
Year: 1168 Days
Day: 27.4 Hours
Environment
Temp: -110 °C
Axial Tilt: 27.7 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (1)
Outer Limit: 56,513,316 km
- M1: 121,025 km (0.064 R)
Planet 3 - Terrestrial
Semi-Major Axis: 2.01 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.92
Radius: 1.73
Gravity: 1.31 G
Time & Orbit
Eccentricity (e): 0.082
Orbit Range: 1.85 AU - 2.17 AU
Year: 1186 Days
Day: 13 Hours
Environment
Temp: -104 °C
Axial Tilt: 36.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 4 - Terrestrial
Semi-Major Axis: 2.13 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.49
Radius: 1.65
Gravity: 1.28 G
Time & Orbit
Eccentricity (e): 0.016
Orbit Range: 2.1 AU - 2.16 AU
Year: 1294 Days
Day: 18.8 Hours
Environment
Temp: -115 °C
Axial Tilt: 25.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 5 - Gas Giant
Semi-Major Axis: 3.43 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 413
Radius: 9.1
Gravity: 4.99 G
Time & Orbit
Eccentricity (e): 0.19
Orbit Range: 2.78 AU - 4.08 AU
Year: 2644 Days
Day: 10.4 Hours
Environment
Temp: -153 °C
Axial Tilt: 9.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (73)
Outer Limit: 56,513,316 km
- M1: 113,694 km (0.093 R)
- M2: 182,659 km (0.099 R)
- M3: 332,706 km (0.101 R)
- M4: 606,021 km (0.08 R)
- M5: 709,393 km (0.094 R)
- M6: 819,198 km (0.113 R)
- M7: 898,784 km (0.08 R)
- M8: 962,513 km (0.106 R)
- M9: 1,284,747 km (0.081 R)
- M10: 1,378,544 km (0.088 R)
- M11: 1,474,586 km (0.1 R)
- M12: 1,572,872 km (0.109 R)
- M13: 1,893,311 km (0.046 R)
- M14: 1,988,604 km (0.11 R)
- M15: 2,196,695 km (0.069 R)
- M16: 2,386,236 km (0.047 R)
- M17: 2,594,326 km (0.108 R)
- M18: 2,754,396 km (0.083 R)
- M19: 3,070,347 km (0.116 R)
- M20: 3,239,841 km (0.098 R)
- M21: 3,354,583 km (0.092 R)
- M22: 3,514,503 km (0.091 R)
- M23: 3,632,535 km (0.11 R)
- M24: 3,751,765 km (0.058 R)
- M25: 3,902,859 km (0.085 R)
- M26: 3,979,004 km (0.098 R)
- M27: 4,415,232 km (0.099 R)
- M28: 4,478,811 km (0.119 R)
- M29: 4,558,696 km (0.081 R)
- M30: 4,817,650 km (0.098 R)
- M31: 5,383,878 km (0.028 R)
- M32: 5,485,904 km (0.069 R)
- M33: 5,640,438 km (0.065 R)
- M34: 5,778,816 km (0.11 R)
- M35: 6,415,804 km (0.067 R)
- M36: 6,614,919 km (0.074 R)
- M37: 6,724,424 km (0.07 R)
- M38: 6,982,331 km (0.03 R)
- M39: 7,075,082 km (0.116 R)
- M40: 7,224,530 km (0.095 R)
- M41: 7,318,477 km (0.116 R)
- M42: 7,450,722 km (0.112 R)
- M43: 7,564,716 km (0.073 R)
- M44: 8,437,769 km (0.104 R)
- M45: 8,815,952 km (0.057 R)
- M46: 8,997,115 km (0.051 R)
- M47: 9,363,032 km (0.1 R)
- M48: 9,568,429 km (0.12 R)
- M49: 9,879,294 km (0.111 R)
- M50: 10,277,823 km (0.115 R)
- M51: 10,532,288 km (0.043 R)
- M52: 10,660,344 km (0.071 R)
- M53: 11,242,729 km (0.038 R)
- M54: 11,351,786 km (0.091 R)
- M55: 11,417,309 km (0.077 R)
- M56: 11,991,017 km (0.104 R)
- M57: 12,574,000 km (0.114 R)
- M58: 12,960,112 km (0.074 R)
- M59: 13,097,443 km (0.058 R)
- M60: 13,419,527 km (0.101 R)
- M61: 13,604,730 km (0.071 R)
- M62: 13,720,967 km (0.12 R)
- M63: 13,954,340 km (0.049 R)
- M64: 14,071,475 km (0.076 R)
- M65: 14,496,183 km (0.077 R)
- M66: 14,567,392 km (0.087 R)
- M67: 14,710,108 km (0.105 R)
- M68: 14,901,145 km (0.096 R)
- M69: 15,020,973 km (0.063 R)
- M70: 15,648,984 km (0.054 R)
- M71: 15,722,138 km (0.07 R)
- M72: 16,039,884 km (0.1 R)
- M73: 16,285,823 km (0.025 R)
Planet 6 - Gas Giant
Semi-Major Axis: 3.75 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 587.7
Radius: 8.9
Gravity: 7.42 G
Time & Orbit
Eccentricity (e): 0.221
Orbit Range: 2.92 AU - 4.58 AU
Year: 3023 Days
Day: 15 Hours
Environment
Temp: -141 °C
Axial Tilt: 33.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (73)
Outer Limit: 56,513,316 km
- M1: 128,056 km (0.109 R)
- M2: 227,538 km (0.106 R)
- M3: 292,613 km (0.111 R)
- M4: 464,501 km (0.072 R)
- M5: 521,349 km (0.051 R)
- M6: 607,367 km (0.075 R)
- M7: 680,072 km (0.058 R)
- M8: 844,929 km (0.101 R)
- M9: 969,394 km (0.095 R)
- M10: 1,045,091 km (0.088 R)
- M11: 1,133,952 km (0.092 R)
- M12: 1,367,773 km (0.097 R)
- M13: 1,578,856 km (0.104 R)
- M14: 1,760,617 km (0.118 R)
- M15: 1,963,023 km (0.119 R)
- M16: 2,032,287 km (0.1 R)
- M17: 2,302,760 km (0.05 R)
- M18: 2,375,913 km (0.044 R)
- M19: 3,296,987 km (0.097 R)
- M20: 3,683,548 km (0.075 R)
- M21: 4,684,059 km (0.106 R)
- M22: 5,195,085 km (0.089 R)
- M23: 5,330,471 km (0.088 R)
- M24: 5,545,743 km (0.105 R)
- M25: 5,843,742 km (0.071 R)
- M26: 6,476,241 km (0.098 R)
- M27: 6,643,043 km (0.096 R)
- M28: 7,541,827 km (0.057 R)
- M29: 7,695,314 km (0.055 R)
- M30: 7,827,709 km (0.09 R)
- M31: 8,274,557 km (0.049 R)
- M32: 8,432,982 km (0.111 R)
- M33: 8,569,564 km (0.09 R)
- M34: 8,660,969 km (0.104 R)
- M35: 8,798,748 km (0.113 R)
- M36: 9,053,214 km (0.109 R)
- M37: 9,239,912 km (0.116 R)
- M38: 9,474,931 km (0.091 R)
- M39: 9,545,840 km (0.082 R)
- M40: 9,735,829 km (0.111 R)
- M41: 9,831,273 km (0.099 R)
- M42: 10,313,277 km (0.101 R)
- M43: 10,581,656 km (0.087 R)
- M44: 10,951,312 km (0.098 R)
- M45: 11,450,819 km (0.117 R)
- M46: 11,703,490 km (0.115 R)
- M47: 11,957,807 km (0.116 R)
- M48: 12,524,035 km (0.118 R)
- M49: 13,151,598 km (0.081 R)
- M50: 13,442,565 km (0.067 R)
- M51: 13,575,558 km (0.118 R)
- M52: 13,950,301 km (0.083 R)
- M53: 14,139,093 km (0.08 R)
- M54: 14,274,330 km (0.088 R)
- M55: 14,437,242 km (0.041 R)
- M56: 14,655,355 km (0.097 R)
- M57: 15,622,655 km (0.099 R)
- M58: 15,902,852 km (0.059 R)
- M59: 16,839,185 km (0.116 R)
- M60: 16,982,649 km (0.031 R)
- M61: 17,212,881 km (0.118 R)
- M62: 17,415,287 km (0.116 R)
- M63: 17,793,320 km (0.09 R)
- M64: 18,616,557 km (0.076 R)
- M65: 18,854,119 km (0.064 R)
- M66: 19,002,969 km (0.076 R)
- M67: 19,332,084 km (0.057 R)
- M68: 19,572,637 km (0.079 R)
- M69: 19,662,995 km (0.11 R)
- M70: 19,753,651 km (0.091 R)
- M71: 20,056,587 km (0.112 R)
- M72: 20,391,686 km (0.047 R)
- M73: 20,483,389 km (0.074 R)
Planet 7 - Gas Giant
Semi-Major Axis: 5.83 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 617.8
Radius: 14.3
Gravity: 3.02 G
Time & Orbit
Eccentricity (e): 0.249
Orbit Range: 4.38 AU - 7.28 AU
Year: 5859 Days
Day: 11.2 Hours
Environment
Temp: -163 °C
Axial Tilt: 116.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (79)
Outer Limit: 56,513,316 km
- M1: 178,919 km (0.12 R)
- M2: 345,421 km (0.087 R)
- M3: 496,067 km (0.037 R)
- M4: 907,610 km (0.063 R)
- M5: 1,322,445 km (0.116 R)
- M6: 1,759,720 km (0.049 R)
- M7: 2,032,736 km (0.06 R)
- M8: 2,300,217 km (0.093 R)
- M9: 2,478,388 km (0.112 R)
- M10: 2,620,207 km (0.1 R)
- M11: 2,869,886 km (0.071 R)
- M12: 3,083,960 km (0.081 R)
- M13: 3,348,150 km (0.097 R)
- M14: 3,619,820 km (0.081 R)
- M15: 3,758,347 km (0.091 R)
- M16: 3,945,943 km (0.114 R)
- M17: 4,184,851 km (0.032 R)
- M18: 4,330,559 km (0.085 R)
- M19: 4,478,063 km (0.101 R)
- M20: 4,602,229 km (0.117 R)
- M21: 4,702,310 km (0.117 R)
- M22: 4,854,002 km (0.097 R)
- M23: 5,345,132 km (0.035 R)
- M24: 5,583,441 km (0.11 R)
- M25: 5,933,800 km (0.097 R)
- M26: 6,043,156 km (0.1 R)
- M27: 6,291,488 km (0.089 R)
- M28: 6,487,012 km (0.076 R)
- M29: 6,884,195 km (0.095 R)
- M30: 7,851,943 km (0.069 R)
- M31: 8,062,727 km (0.11 R)
- M32: 9,208,048 km (0.067 R)
- M33: 9,430,500 km (0.092 R)
- M34: 10,305,049 km (0.116 R)
- M35: 10,735,592 km (0.092 R)
- M36: 11,003,372 km (0.099 R)
- M37: 11,614,180 km (0.116 R)
- M38: 11,958,255 km (0.109 R)
- M39: 12,096,783 km (0.112 R)
- M40: 12,975,222 km (0.105 R)
- M41: 13,117,639 km (0.109 R)
- M42: 14,386,378 km (0.109 R)
- M43: 14,644,734 km (0.079 R)
- M44: 14,979,235 km (0.104 R)
- M45: 15,693,864 km (0.114 R)
- M46: 15,959,998 km (0.096 R)
- M47: 16,227,629 km (0.08 R)
- M48: 16,728,483 km (0.09 R)
- M49: 16,883,765 km (0.035 R)
- M50: 17,509,084 km (0.119 R)
- M51: 17,706,105 km (0.111 R)
- M52: 17,824,736 km (0.105 R)
- M53: 17,943,517 km (0.065 R)
- M54: 18,742,519 km (0.12 R)
- M55: 19,634,870 km (0.079 R)
- M56: 19,839,670 km (0.101 R)
- M57: 20,168,635 km (0.116 R)
- M58: 20,790,514 km (0.083 R)
- M59: 21,883,476 km (0.032 R)
- M60: 22,479,623 km (0.074 R)
- M61: 22,650,913 km (0.052 R)
- M62: 23,297,325 km (0.114 R)
- M63: 23,470,709 km (0.04 R)
- M64: 23,949,722 km (0.111 R)
- M65: 25,361,776 km (0.111 R)
- M66: 25,495,516 km (0.096 R)
- M67: 25,763,745 km (0.088 R)
- M68: 26,167,809 km (0.062 R)
- M69: 26,303,046 km (0.114 R)
- M70: 26,709,952 km (0.116 R)
- M71: 28,729,074 km (0.06 R)
- M72: 29,569,366 km (0.079 R)
- M73: 30,228,344 km (0.061 R)
- M74: 30,322,890 km (0.09 R)
- M75: 30,559,703 km (0.031 R)
- M76: 30,797,115 km (0.069 R)
- M77: 30,892,259 km (0.112 R)
- M78: 31,897,108 km (0.065 R)
- M79: 32,331,092 km (0.083 R)
Planet 8 - Ice Giant
Semi-Major Axis: 10.79 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 544.3
Radius: 6.3
Gravity: 13.71 G
Time & Orbit
Eccentricity (e): 0.183
Orbit Range: 8.82 AU - 12.76 AU
Year: 14753 Days
Day: 18.4 Hours
Environment
Temp: -192 °C
Axial Tilt: 38.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (93)
Outer Limit: 56,513,316 km
- M1: 194,627 km (0.087 R)
- M2: 240,853 km (0.083 R)
- M3: 292,015 km (0.12 R)
- M4: 347,516 km (0.118 R)
- M5: 626,815 km (0.073 R)
- M6: 880,982 km (0.065 R)
- M7: 965,355 km (0.062 R)
- M8: 1,330,075 km (0.093 R)
- M9: 1,814,173 km (0.117 R)
- M10: 1,977,684 km (0.102 R)
- M11: 2,617,664 km (0.098 R)
- M12: 2,678,849 km (0.119 R)
- M13: 2,802,567 km (0.084 R)
- M14: 3,383,006 km (0.104 R)
- M15: 3,584,515 km (0.106 R)
- M16: 5,102,185 km (0.03 R)
- M17: 5,255,972 km (0.114 R)
- M18: 5,528,838 km (0.03 R)
- M19: 7,520,584 km (0.093 R)
- M20: 8,184,200 km (0.116 R)
- M21: 8,866,367 km (0.042 R)
- M22: 9,472,388 km (0.065 R)
- M23: 9,661,479 km (0.056 R)
- M24: 10,674,855 km (0.05 R)
- M25: 11,169,127 km (0.035 R)
- M26: 12,026,622 km (0.12 R)
- M27: 12,334,195 km (0.037 R)
- M28: 13,643,924 km (0.049 R)
- M29: 13,750,587 km (0.076 R)
- M30: 13,911,106 km (0.096 R)
- M31: 15,829,399 km (0.098 R)
- M32: 16,222,991 km (0.093 R)
- M33: 16,279,539 km (0.12 R)
- M34: 17,019,750 km (0.043 R)
- M35: 17,712,687 km (0.11 R)
- M36: 18,121,239 km (0.081 R)
- M37: 18,414,899 km (0.052 R)
- M38: 18,591,874 km (0.096 R)
- M39: 18,947,468 km (0.081 R)
- M40: 19,305,456 km (0.114 R)
- M41: 19,786,114 km (0.061 R)
- M42: 19,967,277 km (0.092 R)
- M43: 20,149,188 km (0.051 R)
- M44: 20,392,434 km (0.106 R)
- M45: 20,453,470 km (0.064 R)
- M46: 21,189,790 km (0.102 R)
- M47: 22,751,742 km (0.095 R)
- M48: 23,005,011 km (0.073 R)
- M49: 23,195,599 km (0.111 R)
- M50: 23,259,327 km (0.053 R)
- M51: 23,450,663 km (0.101 R)
- M52: 24,674,374 km (0.027 R)
- M53: 25,984,851 km (0.111 R)
- M54: 26,050,973 km (0.119 R)
- M55: 26,382,332 km (0.026 R)
- M56: 26,448,754 km (0.081 R)
- M57: 28,060,372 km (0.112 R)
- M58: 30,397,091 km (0.091 R)
- M59: 31,307,094 km (0.07 R)
- M60: 31,447,866 km (0.049 R)
- M61: 32,510,310 km (0.087 R)
- M62: 34,743,208 km (0.11 R)
- M63: 35,327,388 km (0.118 R)
- M64: 36,062,362 km (0.097 R)
- M65: 36,357,668 km (0.1 R)
- M66: 36,653,872 km (0.117 R)
- M67: 38,221,807 km (0.071 R)
- M68: 38,824,836 km (0.1 R)
- M69: 39,279,165 km (0.105 R)
- M70: 39,735,289 km (0.092 R)
- M71: 40,883,153 km (0.116 R)
- M72: 40,960,196 km (0.049 R)
- M73: 41,577,138 km (0.118 R)
- M74: 42,976,775 km (0.111 R)
- M75: 43,682,429 km (0.107 R)
- M76: 43,761,117 km (0.111 R)
- M77: 45,822,127 km (0.099 R)
- M78: 45,982,047 km (0.074 R)
- M79: 47,509,741 km (0.104 R)
- M80: 48,320,561 km (0.101 R)
- M81: 48,972,509 km (0.107 R)
- M82: 49,955,815 km (0.117 R)
- M83: 50,285,080 km (0.114 R)
- M84: 51,194,187 km (0.105 R)
- M85: 51,609,171 km (0.094 R)
- M86: 53,028,556 km (0.086 R)
- M87: 53,869,445 km (0.119 R)
- M88: 54,460,656 km (0.053 R)
- M89: 54,714,673 km (0.103 R)
- M90: 55,820,201 km (0.115 R)
- M91: 55,905,472 km (0.078 R)
- M92: 57,190,817 km (0.107 R)
- M93: 57,449,023 km (0.106 R)
Planet 9 - Ice Giant
Semi-Major Axis: 14.24 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 224.4
Radius: 5.8
Gravity: 6.67 G
Time & Orbit
Eccentricity (e): 0.118
Orbit Range: 12.56 AU - 15.92 AU
Year: 22367 Days
Day: 16 Hours
Environment
Temp: -202 °C
Axial Tilt: 22 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (70)
Outer Limit: 56,513,316 km
- M1: 208,390 km (0.077 R)
- M2: 473,776 km (0.119 R)
- M3: 665,711 km (0.084 R)
- M4: 1,185,414 km (0.115 R)
- M5: 1,777,223 km (0.117 R)
- M6: 2,131,321 km (0.099 R)
- M7: 2,447,720 km (0.086 R)
- M8: 2,809,747 km (0.049 R)
- M9: 3,889,395 km (0.067 R)
- M10: 4,346,566 km (0.097 R)
- M11: 4,454,426 km (0.118 R)
- M12: 4,672,989 km (0.077 R)
- M13: 4,709,640 km (0.099 R)
- M14: 5,082,588 km (0.118 R)
- M15: 5,234,429 km (0.074 R)
- M16: 5,349,321 km (0.082 R)
- M17: 5,975,837 km (0.051 R)
- M18: 7,000,732 km (0.047 R)
- M19: 7,297,235 km (0.044 R)
- M20: 7,511,608 km (0.119 R)
- M21: 8,389,748 km (0.101 R)
- M22: 9,253,825 km (0.059 R)
- M23: 9,300,051 km (0.109 R)
- M24: 10,145,728 km (0.08 R)
- M25: 10,193,449 km (0.099 R)
- M26: 10,820,414 km (0.096 R)
- M27: 11,509,462 km (0.092 R)
- M28: 12,263,435 km (0.035 R)
- M29: 13,033,266 km (0.093 R)
- M30: 15,765,222 km (0.112 R)
- M31: 16,265,178 km (0.112 R)
- M32: 17,623,676 km (0.036 R)
- M33: 18,200,376 km (0.115 R)
- M34: 23,156,853 km (0.067 R)
- M35: 23,345,645 km (0.119 R)
- M36: 24,105,902 km (0.086 R)
- M37: 24,297,237 km (0.098 R)
- M38: 24,809,909 km (0.062 R)
- M39: 27,692,810 km (0.108 R)
- M40: 27,893,121 km (0.115 R)
- M41: 27,959,992 km (0.099 R)
- M42: 28,631,985 km (0.101 R)
- M43: 29,991,830 km (0.094 R)
- M44: 31,025,551 km (0.07 R)
- M45: 31,651,319 km (0.104 R)
- M46: 32,421,748 km (0.091 R)
- M47: 33,198,460 km (0.11 R)
- M48: 33,553,456 km (0.064 R)
- M49: 34,124,172 km (0.073 R)
- M50: 35,564,949 km (0.048 R)
- M51: 36,073,881 km (0.026 R)
- M52: 36,438,900 km (0.062 R)
- M53: 39,252,686 km (0.103 R)
- M54: 40,306,753 km (0.089 R)
- M55: 40,685,535 km (0.097 R)
- M56: 40,989,368 km (0.119 R)
- M57: 41,828,761 km (0.118 R)
- M58: 42,442,861 km (0.066 R)
- M59: 42,596,797 km (0.083 R)
- M60: 42,751,032 km (0.085 R)
- M61: 43,214,636 km (0.107 R)
- M62: 45,085,806 km (0.072 R)
- M63: 47,301,800 km (0.099 R)
- M64: 47,461,570 km (0.108 R)
- M65: 48,021,664 km (0.082 R)
- M66: 48,664,636 km (0.097 R)
- M67: 49,391,233 km (0.092 R)
- M68: 50,691,986 km (0.113 R)
- M69: 52,912,318 km (0.075 R)
- M70: 54,159,516 km (0.113 R)
Kuiper Belt
Range: 30 - 51 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 324 - 14,755 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.