G0V Star System Generated (Seed: 1766925421)
Star Details
Spectral Class: G2V
Temperature: 5,840 K
Mass: 1.06 sol
Luminosity: 1.23 lux
Habitable Zone (HZ)
Inner Boundary: 1.06 AU
Outer Boundary: 1.52 AU
Physical Limits
Snow Line: 5.32 AU
Max System Radius: 20.6 AU
Planetary System (7 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 0.66 AU
Status: Inner (Hot)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.12
Radius: 1.76
Gravity: 1.33 G
Time & Orbit
Eccentricity (e): 0.149
Orbit Range: 0.56 AU - 0.76 AU
Year: 190 Days
Day: 35 Hours
Environment
Temp: 197 °C
Axial Tilt: 7.1 °
Atmosphere: Dense COâ‚‚
Biome: Volcanic/Barren
Planet 2 - Terrestrial
Semi-Major Axis: 0.82 AU
Status: Inner (Hot)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.04
Radius: 1.02
Gravity: 1 G
Time & Orbit
Eccentricity (e): 0.057
Orbit Range: 0.77 AU - 0.87 AU
Year: 263 Days
Day: 14.9 Hours
Environment
Temp: 165 °C
Axial Tilt: 5.8 °
Atmosphere: Dense COâ‚‚
Biome: Volcanic/Barren
Satellites (1)
Outer Limit: 54,275,059 km
- M1: 244,892 km (0.092 R)
Planet 3 - Gas Giant
Semi-Major Axis: 5.48 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 820.6
Radius: 11.2
Gravity: 6.54 G
Time & Orbit
Eccentricity (e): 0.146
Orbit Range: 4.68 AU - 6.28 AU
Year: 4551 Days
Day: 7.3 Hours
Environment
Temp: -142 °C
Axial Tilt: 11.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (82)
Outer Limit: 54,275,059 km
- M1: 205,697 km (0.115 R)
- M2: 344,075 km (0.113 R)
- M3: 464,501 km (0.079 R)
- M4: 767,437 km (0.103 R)
- M5: 1,003,353 km (0.086 R)
- M6: 1,323,792 km (0.064 R)
- M7: 1,496,128 km (0.087 R)
- M8: 1,626,428 km (0.1 R)
- M9: 1,846,337 km (0.049 R)
- M10: 1,986,510 km (0.089 R)
- M11: 2,166,925 km (0.112 R)
- M12: 2,467,018 km (0.09 R)
- M13: 2,780,725 km (0.063 R)
- M14: 2,962,786 km (0.071 R)
- M15: 3,128,091 km (0.114 R)
- M16: 3,296,389 km (0.099 R)
- M17: 3,403,202 km (0.112 R)
- M18: 3,864,412 km (0.109 R)
- M19: 4,345,369 km (0.119 R)
- M20: 4,533,713 km (0.109 R)
- M21: 4,652,793 km (0.062 R)
- M22: 4,991,931 km (0.094 R)
- M23: 5,617,250 km (0.091 R)
- M24: 5,978,380 km (0.104 R)
- M25: 6,400,395 km (0.086 R)
- M26: 7,752,311 km (0.116 R)
- M27: 7,895,177 km (0.106 R)
- M28: 8,067,664 km (0.026 R)
- M29: 8,299,690 km (0.068 R)
- M30: 8,504,639 km (0.106 R)
- M31: 8,800,095 km (0.119 R)
- M32: 8,979,163 km (0.096 R)
- M33: 9,553,918 km (0.044 R)
- M34: 9,861,192 km (0.102 R)
- M35: 9,985,059 km (0.118 R)
- M36: 10,078,259 km (0.091 R)
- M37: 10,422,633 km (0.082 R)
- M38: 10,739,033 km (0.079 R)
- M39: 10,930,368 km (0.104 R)
- M40: 11,090,737 km (0.11 R)
- M41: 12,736,763 km (0.114 R)
- M42: 13,075,153 km (0.116 R)
- M43: 13,519,309 km (0.102 R)
- M44: 13,760,611 km (0.065 R)
- M45: 14,352,569 km (0.104 R)
- M46: 14,528,347 km (0.099 R)
- M47: 15,166,681 km (0.103 R)
- M48: 16,765,583 km (0.094 R)
- M49: 17,173,686 km (0.091 R)
- M50: 17,961,768 km (0.073 R)
- M51: 18,189,156 km (0.025 R)
- M52: 18,265,152 km (0.079 R)
- M53: 18,455,590 km (0.069 R)
- M54: 18,570,182 km (0.05 R)
- M55: 18,761,667 km (0.083 R)
- M56: 19,108,136 km (0.115 R)
- M57: 20,356,829 km (0.045 R)
- M58: 20,475,311 km (0.11 R)
- M59: 20,831,952 km (0.051 R)
- M60: 20,911,538 km (0.106 R)
- M61: 21,551,368 km (0.041 R)
- M62: 23,055,874 km (0.072 R)
- M63: 23,220,432 km (0.095 R)
- M64: 23,344,299 km (0.111 R)
- M65: 23,468,166 km (0.081 R)
- M66: 23,924,739 km (0.063 R)
- M67: 24,133,129 km (0.119 R)
- M68: 24,384,154 km (0.104 R)
- M69: 24,551,853 km (0.042 R)
- M70: 25,481,604 km (0.052 R)
- M71: 26,122,032 km (0.059 R)
- M72: 26,681,379 km (0.112 R)
- M73: 26,767,846 km (0.038 R)
- M74: 26,854,314 km (0.067 R)
- M75: 26,984,314 km (0.03 R)
- M76: 27,899,704 km (0.066 R)
- M77: 27,987,368 km (0.082 R)
- M78: 28,075,182 km (0.052 R)
- M79: 28,427,335 km (0.091 R)
- M80: 28,515,598 km (0.042 R)
- M81: 29,135,980 km (0.112 R)
- M82: 29,715,971 km (0.093 R)
Planet 4 - Gas Giant
Semi-Major Axis: 5.99 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 958.6
Radius: 9
Gravity: 11.83 G
Time & Orbit
Eccentricity (e): 0.095
Orbit Range: 5.42 AU - 6.56 AU
Year: 5201 Days
Day: 11.4 Hours
Environment
Temp: -150 °C
Axial Tilt: 14.5 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (84)
Outer Limit: 54,275,059 km
- M1: 124,166 km (0.113 R)
- M2: 240,404 km (0.068 R)
- M3: 398,828 km (0.076 R)
- M4: 486,791 km (0.074 R)
- M5: 545,583 km (0.095 R)
- M6: 711,338 km (0.109 R)
- M7: 821,741 km (0.082 R)
- M8: 998,865 km (0.093 R)
- M9: 1,512,883 km (0.097 R)
- M10: 2,407,329 km (0.09 R)
- M11: 3,110,888 km (0.075 R)
- M12: 3,485,630 km (0.098 R)
- M13: 3,605,608 km (0.103 R)
- M14: 3,776,000 km (0.04 R)
- M15: 4,201,007 km (0.085 R)
- M16: 4,667,603 km (0.07 R)
- M17: 4,746,890 km (0.103 R)
- M18: 4,826,775 km (0.118 R)
- M19: 5,453,740 km (0.084 R)
- M20: 5,677,838 km (0.108 R)
- M21: 5,904,927 km (0.111 R)
- M22: 6,048,541 km (0.097 R)
- M23: 6,485,965 km (0.094 R)
- M24: 6,723,527 km (0.066 R)
- M25: 7,639,514 km (0.085 R)
- M26: 8,627,010 km (0.075 R)
- M27: 8,855,446 km (0.053 R)
- M28: 9,285,091 km (0.084 R)
- M29: 9,351,812 km (0.078 R)
- M30: 9,553,021 km (0.095 R)
- M31: 10,406,327 km (0.071 R)
- M32: 10,789,447 km (0.103 R)
- M33: 11,000,380 km (0.045 R)
- M34: 11,355,077 km (0.111 R)
- M35: 11,713,513 km (0.12 R)
- M36: 12,368,004 km (0.1 R)
- M37: 13,902,878 km (0.061 R)
- M38: 14,209,404 km (0.048 R)
- M39: 15,338,868 km (0.057 R)
- M40: 15,576,280 km (0.081 R)
- M41: 15,814,739 km (0.1 R)
- M42: 16,214,913 km (0.063 R)
- M43: 17,230,084 km (0.098 R)
- M44: 17,683,366 km (0.114 R)
- M45: 19,108,734 km (0.102 R)
- M46: 19,835,182 km (0.1 R)
- M47: 19,964,285 km (0.063 R)
- M48: 20,180,154 km (0.09 R)
- M49: 20,266,772 km (0.115 R)
- M50: 20,876,233 km (0.088 R)
- M51: 21,007,580 km (0.099 R)
- M52: 22,785,401 km (0.1 R)
- M53: 23,327,993 km (0.12 R)
- M54: 23,555,382 km (0.025 R)
- M55: 24,012,403 km (0.086 R)
- M56: 24,334,038 km (0.062 R)
- M57: 24,472,267 km (0.068 R)
- M58: 24,657,170 km (0.046 R)
- M59: 24,888,747 km (0.095 R)
- M60: 25,307,472 km (0.038 R)
- M61: 25,728,590 km (0.084 R)
- M62: 26,340,894 km (0.083 R)
- M63: 26,767,697 km (0.116 R)
- M64: 26,910,413 km (0.096 R)
- M65: 27,772,246 km (0.094 R)
- M66: 28,254,999 km (0.109 R)
- M67: 29,424,854 km (0.057 R)
- M68: 29,670,494 km (0.077 R)
- M69: 30,164,017 km (0.065 R)
- M70: 30,263,051 km (0.034 R)
- M71: 30,759,716 km (0.119 R)
- M72: 30,909,314 km (0.072 R)
- M73: 31,560,064 km (0.114 R)
- M74: 32,063,760 km (0.117 R)
- M75: 32,266,017 km (0.084 R)
- M76: 32,418,008 km (0.056 R)
- M77: 32,977,055 km (0.055 R)
- M78: 33,079,081 km (0.102 R)
- M79: 33,539,543 km (0.115 R)
- M80: 33,642,168 km (0.084 R)
- M81: 33,950,489 km (0.056 R)
- M82: 34,105,023 km (0.086 R)
- M83: 34,311,468 km (0.092 R)
- M84: 34,673,794 km (0.102 R)
Planet 5 - Gas Giant
Semi-Major Axis: 9.72 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 59.8
Radius: 14.2
Gravity: 0.3 G
Time & Orbit
Eccentricity (e): 0.248
Orbit Range: 7.31 AU - 12.13 AU
Year: 10751 Days
Day: 9.4 Hours
Environment
Temp: -171 °C
Axial Tilt: 31.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (66)
Outer Limit: 54,275,059 km
- M1: 239,207 km (0.091 R)
- M2: 327,769 km (0.056 R)
- M3: 416,780 km (0.102 R)
- M4: 640,428 km (0.112 R)
- M5: 814,560 km (0.096 R)
- M6: 1,274,723 km (0.058 R)
- M7: 1,373,757 km (0.102 R)
- M8: 1,527,544 km (0.107 R)
- M9: 1,797,269 km (0.075 R)
- M10: 1,909,617 km (0.115 R)
- M11: 2,053,680 km (0.078 R)
- M12: 2,156,753 km (0.035 R)
- M13: 2,618,561 km (0.082 R)
- M14: 3,317,034 km (0.104 R)
- M15: 3,421,602 km (0.12 R)
- M16: 3,723,790 km (0.116 R)
- M17: 4,053,354 km (0.072 R)
- M18: 4,221,652 km (0.086 R)
- M19: 5,018,410 km (0.063 R)
- M20: 5,568,482 km (0.047 R)
- M21: 5,819,208 km (0.118 R)
- M22: 6,971,111 km (0.118 R)
- M23: 7,151,077 km (0.07 R)
- M24: 7,287,211 km (0.116 R)
- M25: 7,630,987 km (0.09 R)
- M26: 7,793,301 km (0.117 R)
- M27: 8,003,636 km (0.107 R)
- M28: 9,010,280 km (0.089 R)
- M29: 9,132,800 km (0.057 R)
- M30: 9,280,603 km (0.032 R)
- M31: 9,478,820 km (0.12 R)
- M32: 9,904,875 km (0.118 R)
- M33: 10,133,012 km (0.112 R)
- M34: 10,749,804 km (0.096 R)
- M35: 10,958,194 km (0.1 R)
- M36: 11,697,805 km (0.057 R)
- M37: 12,046,817 km (0.103 R)
- M38: 12,672,735 km (0.06 R)
- M39: 12,837,741 km (0.096 R)
- M40: 13,309,274 km (0.037 R)
- M41: 13,673,545 km (0.069 R)
- M42: 14,069,680 km (0.116 R)
- M43: 14,354,963 km (0.067 R)
- M44: 14,728,808 km (0.098 R)
- M45: 15,280,824 km (0.099 R)
- M46: 15,397,810 km (0.053 R)
- M47: 15,839,572 km (0.048 R)
- M48: 16,495,110 km (0.12 R)
- M49: 16,765,733 km (0.106 R)
- M50: 17,038,001 km (0.119 R)
- M51: 17,129,106 km (0.119 R)
- M52: 17,525,540 km (0.084 R)
- M53: 17,678,878 km (0.098 R)
- M54: 17,832,515 km (0.097 R)
- M55: 18,389,767 km (0.097 R)
- M56: 18,639,296 km (0.111 R)
- M57: 18,764,510 km (0.106 R)
- M58: 19,015,685 km (0.116 R)
- M59: 19,267,907 km (0.101 R)
- M60: 19,680,348 km (0.057 R)
- M61: 20,031,604 km (0.081 R)
- M62: 20,320,477 km (0.076 R)
- M63: 20,643,160 km (0.103 R)
- M64: 21,130,250 km (0.117 R)
- M65: 21,228,087 km (0.119 R)
- M66: 21,851,611 km (0.112 R)
Planet 6 - Gas Giant
Semi-Major Axis: 11.66 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 472.4
Radius: 8.9
Gravity: 5.96 G
Time & Orbit
Eccentricity (e): 0.082
Orbit Range: 10.7 AU - 12.62 AU
Year: 14125 Days
Day: 5 Hours
Environment
Temp: -172 °C
Axial Tilt: 168.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (90)
Outer Limit: 54,275,059 km
- M1: 115,490 km (0.093 R)
- M2: 198,816 km (0.086 R)
- M3: 387,159 km (0.115 R)
- M4: 474,076 km (0.075 R)
- M5: 892,650 km (0.094 R)
- M6: 1,117,197 km (0.114 R)
- M7: 1,359,994 km (0.112 R)
- M8: 1,742,815 km (0.064 R)
- M9: 1,972,747 km (0.114 R)
- M10: 2,957,550 km (0.082 R)
- M11: 3,017,838 km (0.071 R)
- M12: 3,109,242 km (0.111 R)
- M13: 3,201,394 km (0.116 R)
- M14: 3,325,860 km (0.081 R)
- M15: 5,084,981 km (0.06 R)
- M16: 5,826,687 km (0.111 R)
- M17: 6,132,765 km (0.075 R)
- M18: 6,249,002 km (0.055 R)
- M19: 6,562,410 km (0.069 R)
- M20: 6,881,053 km (0.084 R)
- M21: 7,450,722 km (0.08 R)
- M22: 7,616,177 km (0.096 R)
- M23: 7,741,241 km (0.072 R)
- M24: 8,162,658 km (0.118 R)
- M25: 8,548,471 km (0.116 R)
- M26: 8,635,088 km (0.11 R)
- M27: 8,765,388 km (0.057 R)
- M28: 9,651,157 km (0.086 R)
- M29: 10,518,825 km (0.081 R)
- M30: 12,230,374 km (0.102 R)
- M31: 12,869,456 km (0.12 R)
- M32: 13,368,515 km (0.094 R)
- M33: 14,334,019 km (0.109 R)
- M34: 16,063,819 km (0.07 R)
- M35: 16,654,881 km (0.09 R)
- M36: 16,817,344 km (0.079 R)
- M37: 17,253,122 km (0.118 R)
- M38: 17,637,589 km (0.072 R)
- M39: 18,135,899 km (0.087 R)
- M40: 18,582,898 km (0.096 R)
- M41: 19,373,672 km (0.079 R)
- M42: 19,945,286 km (0.113 R)
- M43: 20,812,953 km (0.074 R)
- M44: 21,163,461 km (0.113 R)
- M45: 22,167,263 km (0.097 R)
- M46: 22,346,032 km (0.102 R)
- M47: 23,126,185 km (0.066 R)
- M48: 24,282,427 km (0.072 R)
- M49: 24,836,687 km (0.091 R)
- M50: 25,519,751 km (0.062 R)
- M51: 26,904,429 km (0.096 R)
- M52: 27,477,838 km (0.097 R)
- M53: 27,862,454 km (0.097 R)
- M54: 27,926,631 km (0.111 R)
- M55: 29,222,298 km (0.092 R)
- M56: 29,943,211 km (0.057 R)
- M57: 30,272,924 km (0.118 R)
- M58: 30,339,047 km (0.071 R)
- M59: 31,002,364 km (0.112 R)
- M60: 32,141,103 km (0.106 R)
- M61: 32,953,120 km (0.119 R)
- M62: 33,498,105 km (0.118 R)
- M63: 33,977,566 km (0.088 R)
- M64: 35,777,976 km (0.119 R)
- M65: 35,987,713 km (0.11 R)
- M66: 36,127,736 km (0.101 R)
- M67: 36,549,004 km (0.113 R)
- M68: 37,751,471 km (0.119 R)
- M69: 39,543,056 km (0.12 R)
- M70: 40,850,242 km (0.098 R)
- M71: 42,097,589 km (0.105 R)
- M72: 43,059,952 km (0.054 R)
- M73: 43,283,152 km (0.086 R)
- M74: 43,432,002 km (0.109 R)
- M75: 44,029,645 km (0.109 R)
- M76: 44,554,584 km (0.101 R)
- M77: 45,459,651 km (0.066 R)
- M78: 46,218,412 km (0.091 R)
- M79: 46,981,361 km (0.1 R)
- M80: 47,210,994 km (0.095 R)
- M81: 48,056,371 km (0.119 R)
- M82: 48,751,852 km (0.065 R)
- M83: 48,829,343 km (0.078 R)
- M84: 48,906,835 km (0.113 R)
- M85: 49,217,251 km (0.036 R)
- M86: 50,152,686 km (0.093 R)
- M87: 50,230,776 km (0.097 R)
- M88: 51,487,698 km (0.037 R)
- M89: 52,516,632 km (0.096 R)
- M90: 53,312,642 km (0.046 R)
Planet 7 - Ice Giant
Semi-Major Axis: 13.33 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 333.6
Radius: 6.6
Gravity: 7.66 G
Time & Orbit
Eccentricity (e): 0.133
Orbit Range: 11.56 AU - 15.1 AU
Year: 17266 Days
Day: 16.3 Hours
Environment
Temp: -183 °C
Axial Tilt: 11.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (92)
Outer Limit: 54,275,059 km
- M1: 107,262 km (0.107 R)
- M2: 258,954 km (0.033 R)
- M3: 322,533 km (0.078 R)
- M4: 406,906 km (0.03 R)
- M5: 467,793 km (0.075 R)
- M6: 706,252 km (0.12 R)
- M7: 918,681 km (0.091 R)
- M8: 1,285,345 km (0.032 R)
- M9: 1,569,730 km (0.103 R)
- M10: 2,505,914 km (0.105 R)
- M11: 3,012,602 km (0.055 R)
- M12: 3,914,228 km (0.101 R)
- M13: 4,324,575 km (0.104 R)
- M14: 4,677,028 km (0.039 R)
- M15: 4,965,602 km (0.056 R)
- M16: 5,149,009 km (0.087 R)
- M17: 5,522,405 km (0.107 R)
- M18: 5,943,224 km (0.078 R)
- M19: 7,060,421 km (0.11 R)
- M20: 7,225,278 km (0.117 R)
- M21: 8,068,412 km (0.11 R)
- M22: 8,327,515 km (0.04 R)
- M23: 8,545,330 km (0.116 R)
- M24: 9,435,886 km (0.105 R)
- M25: 9,938,086 km (0.086 R)
- M26: 10,920,944 km (0.108 R)
- M27: 11,787,714 km (0.112 R)
- M28: 12,526,877 km (0.079 R)
- M29: 13,179,572 km (0.073 R)
- M30: 13,382,726 km (0.074 R)
- M31: 14,205,215 km (0.079 R)
- M32: 14,727,761 km (0.095 R)
- M33: 15,416,210 km (0.077 R)
- M34: 16,115,131 km (0.092 R)
- M35: 17,210,637 km (0.113 R)
- M36: 17,488,141 km (0.068 R)
- M37: 17,655,541 km (0.067 R)
- M38: 18,670,263 km (0.088 R)
- M39: 20,110,891 km (0.114 R)
- M40: 21,170,043 km (0.072 R)
- M41: 21,348,364 km (0.118 R)
- M42: 21,646,513 km (0.072 R)
- M43: 23,342,205 km (0.038 R)
- M44: 24,392,382 km (0.118 R)
- M45: 25,017,252 km (0.11 R)
- M46: 25,205,745 km (0.101 R)
- M47: 25,394,687 km (0.087 R)
- M48: 26,028,085 km (0.105 R)
- M49: 26,474,485 km (0.028 R)
- M50: 27,504,317 km (0.09 R)
- M51: 27,634,018 km (0.115 R)
- M52: 27,763,869 km (0.04 R)
- M53: 29,669,596 km (0.065 R)
- M54: 30,202,613 km (0.083 R)
- M55: 30,604,583 km (0.055 R)
- M56: 31,752,896 km (0.12 R)
- M57: 32,984,087 km (0.06 R)
- M58: 33,052,902 km (0.049 R)
- M59: 33,466,988 km (0.081 R)
- M60: 34,440,123 km (0.088 R)
- M61: 35,351,922 km (0.109 R)
- M62: 35,492,843 km (0.114 R)
- M63: 35,775,433 km (0.097 R)
- M64: 35,916,953 km (0.059 R)
- M65: 36,413,767 km (0.093 R)
- M66: 36,912,975 km (0.118 R)
- M67: 37,773,911 km (0.086 R)
- M68: 38,351,509 km (0.074 R)
- M69: 38,569,024 km (0.087 R)
- M70: 38,859,393 km (0.044 R)
- M71: 38,932,098 km (0.076 R)
- M72: 39,077,806 km (0.074 R)
- M73: 39,150,660 km (0.08 R)
- M74: 40,249,008 km (0.083 R)
- M75: 40,469,964 km (0.072 R)
- M76: 40,765,121 km (0.046 R)
- M77: 42,176,876 km (0.027 R)
- M78: 43,227,352 km (0.113 R)
- M79: 43,680,185 km (0.072 R)
- M80: 43,831,428 km (0.041 R)
- M81: 45,277,441 km (0.086 R)
- M82: 45,967,835 km (0.086 R)
- M83: 46,661,670 km (0.09 R)
- M84: 47,514,378 km (0.089 R)
- M85: 49,314,040 km (0.071 R)
- M86: 49,471,567 km (0.105 R)
- M87: 49,708,231 km (0.11 R)
- M88: 49,787,219 km (0.12 R)
- M89: 50,341,030 km (0.062 R)
- M90: 50,420,317 km (0.119 R)
- M91: 52,496,586 km (0.115 R)
- M92: 53,302,469 km (0.118 R)
Kuiper Belt
Range: 30.9 - 45.9 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 348 - 18,673 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.