G5V Star System Generated (Seed: 1766843356)
Star Details
Spectral Class: G9V
Temperature: 5,200 K
Mass: 0.9 sol
Luminosity: 0.69 lux
Habitable Zone (HZ)
Inner Boundary: 0.79 AU
Outer Boundary: 1.14 AU
Physical Limits
Snow Line: 3.99 AU
Max System Radius: 19 AU
Planetary System (8 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 1.27 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 0.13
Radius: 0.44
Gravity: 0.67 G
Time & Orbit
Eccentricity (e): 0.227
Orbit Range: 0.98 AU - 1.56 AU
Year: 551 Days
Day: 21.1 Hours
Environment
Temp: -42 °C
Axial Tilt: 35.8 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 2 - Terrestrial
Semi-Major Axis: 2.56 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.68
Radius: 1.85
Gravity: 1.37 G
Time & Orbit
Eccentricity (e): 0.136
Orbit Range: 2.21 AU - 2.91 AU
Year: 1577 Days
Day: 35.8 Hours
Environment
Temp: -115 °C
Axial Tilt: 7.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 3 - Terrestrial
Semi-Major Axis: 2.93 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.8
Radius: 1.71
Gravity: 1.3 G
Time & Orbit
Eccentricity (e): 0.166
Orbit Range: 2.44 AU - 3.42 AU
Year: 1931 Days
Day: 34.2 Hours
Environment
Temp: -112 °C
Axial Tilt: 22 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 4 - Gas Giant
Semi-Major Axis: 4.77 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 211.8
Radius: 13.9
Gravity: 1.1 G
Time & Orbit
Eccentricity (e): 0.246
Orbit Range: 3.6 AU - 5.94 AU
Year: 4011 Days
Day: 14.3 Hours
Environment
Temp: -140 °C
Axial Tilt: 14 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (64)
Outer Limit: 102,395,430 km
- M1: 177,273 km (0.098 R)
- M2: 356,492 km (0.119 R)
- M3: 510,129 km (0.067 R)
- M4: 644,168 km (0.101 R)
- M5: 766,689 km (0.071 R)
- M6: 853,605 km (0.111 R)
- M7: 953,537 km (0.081 R)
- M8: 1,057,956 km (0.101 R)
- M9: 1,374,804 km (0.074 R)
- M10: 1,629,869 km (0.117 R)
- M11: 2,110,826 km (0.1 R)
- M12: 2,420,643 km (0.098 R)
- M13: 2,621,852 km (0.086 R)
- M14: 2,856,721 km (0.116 R)
- M15: 3,084,259 km (0.076 R)
- M16: 3,244,179 km (0.066 R)
- M17: 3,377,172 km (0.113 R)
- M18: 3,974,666 km (0.115 R)
- M19: 4,197,417 km (0.084 R)
- M20: 4,407,901 km (0.12 R)
- M21: 4,688,547 km (0.039 R)
- M22: 4,788,927 km (0.054 R)
- M23: 5,180,873 km (0.105 R)
- M24: 5,654,351 km (0.104 R)
- M25: 5,815,168 km (0.101 R)
- M26: 5,905,376 km (0.093 R)
- M27: 6,141,741 km (0.113 R)
- M28: 6,492,996 km (0.102 R)
- M29: 6,718,291 km (0.118 R)
- M30: 7,176,509 km (0.095 R)
- M31: 7,331,642 km (0.081 R)
- M32: 7,507,420 km (0.084 R)
- M33: 7,724,187 km (0.057 R)
- M34: 7,903,106 km (0.034 R)
- M35: 8,265,133 km (0.111 R)
- M36: 8,427,746 km (0.079 R)
- M37: 9,047,230 km (0.03 R)
- M38: 9,660,133 km (0.099 R)
- M39: 10,155,751 km (0.118 R)
- M40: 10,837,019 km (0.06 R)
- M41: 10,992,900 km (0.059 R)
- M42: 11,104,800 km (0.103 R)
- M43: 11,284,467 km (0.089 R)
- M44: 11,374,674 km (0.101 R)
- M45: 11,966,932 km (0.081 R)
- M46: 12,082,122 km (0.117 R)
- M47: 12,616,187 km (0.041 R)
- M48: 12,850,756 km (0.118 R)
- M49: 13,015,912 km (0.111 R)
- M50: 13,205,453 km (0.114 R)
- M51: 13,467,548 km (0.069 R)
- M52: 14,021,360 km (0.118 R)
- M53: 14,240,072 km (0.106 R)
- M54: 14,557,967 km (0.098 R)
- M55: 14,952,457 km (0.053 R)
- M56: 15,151,123 km (0.066 R)
- M57: 15,250,755 km (0.09 R)
- M58: 15,676,660 km (0.112 R)
- M59: 15,878,468 km (0.106 R)
- M60: 16,030,309 km (0.095 R)
- M61: 16,900,371 km (0.07 R)
- M62: 17,133,145 km (0.092 R)
- M63: 17,393,146 km (0.099 R)
- M64: 17,549,775 km (0.08 R)
Planet 5 - Gas Giant
Semi-Major Axis: 9.62 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 409.9
Radius: 12.8
Gravity: 2.5 G
Time & Orbit
Eccentricity (e): 0.093
Orbit Range: 8.73 AU - 10.51 AU
Year: 11488 Days
Day: 5 Hours
Environment
Temp: -184 °C
Axial Tilt: 5.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (85)
Outer Limit: 102,395,430 km
- M1: 210,185 km (0.11 R)
- M2: 303,235 km (0.117 R)
- M3: 759,957 km (0.117 R)
- M4: 959,371 km (0.083 R)
- M5: 1,431,502 km (0.03 R)
- M6: 1,813,874 km (0.07 R)
- M7: 1,971,401 km (0.116 R)
- M8: 2,086,741 km (0.092 R)
- M9: 2,228,410 km (0.081 R)
- M10: 2,571,438 km (0.067 R)
- M11: 2,775,340 km (0.11 R)
- M12: 3,671,880 km (0.098 R)
- M13: 3,815,344 km (0.11 R)
- M14: 4,137,279 km (0.075 R)
- M15: 4,226,738 km (0.073 R)
- M16: 4,996,868 km (0.113 R)
- M17: 5,677,389 km (0.1 R)
- M18: 5,978,081 km (0.103 R)
- M19: 6,249,750 km (0.064 R)
- M20: 6,352,674 km (0.117 R)
- M21: 6,456,195 km (0.084 R)
- M22: 6,911,272 km (0.109 R)
- M23: 7,705,188 km (0.029 R)
- M24: 8,001,093 km (0.092 R)
- M25: 8,150,391 km (0.116 R)
- M26: 8,413,983 km (0.112 R)
- M27: 8,565,974 km (0.09 R)
- M28: 9,221,811 km (0.11 R)
- M29: 9,893,954 km (0.094 R)
- M30: 10,215,739 km (0.072 R)
- M31: 10,911,070 km (0.057 R)
- M32: 11,876,126 km (0.038 R)
- M33: 12,004,032 km (0.049 R)
- M34: 12,218,107 km (0.096 R)
- M35: 12,390,444 km (0.12 R)
- M36: 12,520,145 km (0.089 R)
- M37: 13,131,551 km (0.084 R)
- M38: 13,352,358 km (0.052 R)
- M39: 13,618,792 km (0.067 R)
- M40: 14,112,016 km (0.117 R)
- M41: 14,565,597 km (0.025 R)
- M42: 16,095,833 km (0.049 R)
- M43: 16,284,925 km (0.114 R)
- M44: 16,856,239 km (0.096 R)
- M45: 17,434,136 km (0.103 R)
- M46: 17,823,090 km (0.098 R)
- M47: 19,206,871 km (0.095 R)
- M48: 20,318,233 km (0.044 R)
- M49: 21,450,390 km (0.114 R)
- M50: 21,658,481 km (0.086 R)
- M51: 22,973,895 km (0.12 R)
- M52: 23,293,585 km (0.113 R)
- M53: 23,453,805 km (0.083 R)
- M54: 23,721,884 km (0.108 R)
- M55: 23,937,155 km (0.12 R)
- M56: 24,261,184 km (0.088 R)
- M57: 24,586,560 km (0.064 R)
- M58: 24,804,374 km (0.113 R)
- M59: 25,626,714 km (0.117 R)
- M60: 25,792,318 km (0.086 R)
- M61: 26,402,379 km (0.088 R)
- M62: 26,905,027 km (0.09 R)
- M63: 27,298,171 km (0.12 R)
- M64: 28,033,444 km (0.088 R)
- M65: 29,004,783 km (0.068 R)
- M66: 29,119,824 km (0.086 R)
- M67: 29,639,228 km (0.105 R)
- M68: 29,928,999 km (0.094 R)
- M69: 30,161,623 km (0.087 R)
- M70: 30,278,160 km (0.043 R)
- M71: 30,862,938 km (0.09 R)
- M72: 32,759,391 km (0.058 R)
- M73: 33,480,303 km (0.048 R)
- M74: 34,632,356 km (0.096 R)
- M75: 36,044,261 km (0.034 R)
- M76: 37,099,973 km (0.063 R)
- M77: 37,349,951 km (0.103 R)
- M78: 37,851,403 km (0.103 R)
- M79: 39,496,381 km (0.119 R)
- M80: 39,943,230 km (0.109 R)
- M81: 40,906,491 km (0.116 R)
- M82: 41,358,725 km (0.11 R)
- M83: 42,267,981 km (0.091 R)
- M84: 42,659,628 km (0.111 R)
- M85: 43,380,989 km (0.078 R)
Planet 6 - Gas Giant
Semi-Major Axis: 9.73 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 515.2
Radius: 12.3
Gravity: 3.41 G
Time & Orbit
Eccentricity (e): 0.142
Orbit Range: 8.35 AU - 11.11 AU
Year: 11685 Days
Day: 10 Hours
Environment
Temp: -178 °C
Axial Tilt: 36.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (65)
Outer Limit: 102,395,430 km
- M1: 310,266 km (0.1 R)
- M2: 553,213 km (0.056 R)
- M3: 741,108 km (0.039 R)
- M4: 915,240 km (0.105 R)
- M5: 1,347,578 km (0.093 R)
- M6: 1,609,374 km (0.031 R)
- M7: 3,988,878 km (0.068 R)
- M8: 4,082,526 km (0.065 R)
- M9: 4,562,137 km (0.117 R)
- M10: 4,825,279 km (0.045 R)
- M11: 5,026,040 km (0.093 R)
- M12: 5,505,202 km (0.084 R)
- M13: 6,178,841 km (0.115 R)
- M14: 7,410,480 km (0.062 R)
- M15: 7,565,015 km (0.063 R)
- M16: 8,113,889 km (0.1 R)
- M17: 8,554,156 km (0.066 R)
- M18: 8,635,088 km (0.087 R)
- M19: 9,752,285 km (0.117 R)
- M20: 9,879,294 km (0.106 R)
- M21: 11,984,435 km (0.084 R)
- M22: 13,556,709 km (0.118 R)
- M23: 13,651,254 km (0.113 R)
- M24: 14,222,868 km (0.033 R)
- M25: 14,802,410 km (0.071 R)
- M26: 15,193,010 km (0.095 R)
- M27: 15,884,751 km (0.106 R)
- M28: 16,034,349 km (0.109 R)
- M29: 16,335,040 km (0.079 R)
- M30: 16,688,091 km (0.12 R)
- M31: 16,840,083 km (0.097 R)
- M32: 17,145,711 km (0.071 R)
- M33: 17,247,887 km (0.113 R)
- M34: 17,658,981 km (0.113 R)
- M35: 17,865,726 km (0.078 R)
- M36: 18,490,895 km (0.081 R)
- M37: 19,655,515 km (0.114 R)
- M38: 20,734,863 km (0.094 R)
- M39: 23,063,653 km (0.048 R)
- M40: 23,858,168 km (0.094 R)
- M41: 24,892,936 km (0.098 R)
- M42: 26,531,482 km (0.082 R)
- M43: 26,946,616 km (0.113 R)
- M44: 27,483,522 km (0.087 R)
- M45: 27,603,201 km (0.12 R)
- M46: 27,723,178 km (0.112 R)
- M47: 27,903,444 km (0.079 R)
- M48: 28,023,870 km (0.115 R)
- M49: 29,973,579 km (0.067 R)
- M50: 30,158,632 km (0.114 R)
- M51: 30,467,850 km (0.113 R)
- M52: 30,902,582 km (0.119 R)
- M53: 31,339,258 km (0.111 R)
- M54: 33,681,661 km (0.116 R)
- M55: 34,002,399 km (0.056 R)
- M56: 34,324,334 km (0.083 R)
- M57: 36,473,906 km (0.057 R)
- M58: 38,935,389 km (0.094 R)
- M59: 42,484,598 km (0.05 R)
- M60: 42,761,953 km (0.09 R)
- M61: 44,578,819 km (0.051 R)
- M62: 45,709,480 km (0.076 R)
- M63: 46,207,192 km (0.103 R)
- M64: 47,423,123 km (0.074 R)
- M65: 47,638,844 km (0.077 R)
Asteroid Belt
Center: 10.1 AU
Composition
Type: Outer System (Icy)
A dense region of planetesimals and debris.
Boundary
Planet 7 - Gas Giant
Semi-Major Axis: 10.46 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 957.6
Radius: 10
Gravity: 9.58 G
Time & Orbit
Eccentricity (e): 0.02
Orbit Range: 10.25 AU - 10.67 AU
Year: 13025 Days
Day: 10.3 Hours
Environment
Temp: -192 °C
Axial Tilt: 92.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (93)
Outer Limit: 102,395,430 km
- M1: 178,769 km (0.118 R)
- M2: 265,835 km (0.094 R)
- M3: 332,556 km (0.097 R)
- M4: 596,896 km (0.067 R)
- M5: 774,468 km (0.083 R)
- M6: 837,598 km (0.1 R)
- M7: 1,015,470 km (0.12 R)
- M8: 1,133,204 km (0.082 R)
- M9: 1,460,973 km (0.104 R)
- M10: 1,622,389 km (0.086 R)
- M11: 1,705,266 km (0.119 R)
- M12: 1,818,213 km (0.089 R)
- M13: 1,933,702 km (0.112 R)
- M14: 2,172,161 km (0.094 R)
- M15: 2,677,503 km (0.096 R)
- M16: 2,743,176 km (0.098 R)
- M17: 2,909,978 km (0.093 R)
- M18: 3,538,139 km (0.078 R)
- M19: 4,400,272 km (0.099 R)
- M20: 4,478,212 km (0.092 R)
- M21: 5,660,185 km (0.076 R)
- M22: 6,707,520 km (0.06 R)
- M23: 6,887,785 km (0.105 R)
- M24: 8,291,013 km (0.092 R)
- M25: 8,436,123 km (0.099 R)
- M26: 8,679,968 km (0.034 R)
- M27: 9,224,354 km (0.118 R)
- M28: 9,425,115 km (0.112 R)
- M29: 9,627,221 km (0.105 R)
- M30: 9,933,299 km (0.069 R)
- M31: 10,190,757 km (0.084 R)
- M32: 11,082,509 km (0.059 R)
- M33: 11,295,836 km (0.099 R)
- M34: 11,510,808 km (0.07 R)
- M35: 12,828,017 km (0.098 R)
- M36: 13,390,954 km (0.11 R)
- M37: 13,847,078 km (0.12 R)
- M38: 14,019,415 km (0.063 R)
- M39: 14,134,755 km (0.111 R)
- M40: 15,483,380 km (0.12 R)
- M41: 15,962,093 km (0.111 R)
- M42: 17,365,321 km (0.049 R)
- M43: 17,551,271 km (0.091 R)
- M44: 18,238,673 km (0.116 R)
- M45: 18,427,765 km (0.058 R)
- M46: 19,382,499 km (0.08 R)
- M47: 20,028,013 km (0.116 R)
- M48: 20,223,089 km (0.086 R)
- M49: 20,353,389 km (0.07 R)
- M50: 21,340,136 km (0.098 R)
- M51: 21,472,830 km (0.064 R)
- M52: 22,006,595 km (0.097 R)
- M53: 24,046,661 km (0.06 R)
- M54: 24,739,897 km (0.07 R)
- M55: 24,809,610 km (0.11 R)
- M56: 25,019,197 km (0.064 R)
- M57: 25,089,059 km (0.065 R)
- M58: 25,510,326 km (0.098 R)
- M59: 25,933,688 km (0.094 R)
- M60: 26,573,369 km (0.098 R)
- M61: 26,644,727 km (0.069 R)
- M62: 27,218,136 km (0.118 R)
- M63: 27,723,178 km (0.083 R)
- M64: 28,523,078 km (0.077 R)
- M65: 28,596,231 km (0.091 R)
- M66: 28,889,294 km (0.11 R)
- M67: 29,109,651 km (0.087 R)
- M68: 29,478,260 km (0.074 R)
- M69: 31,043,353 km (0.099 R)
- M70: 31,949,617 km (0.038 R)
- M71: 32,558,780 km (0.086 R)
- M72: 33,171,682 km (0.116 R)
- M73: 34,098,142 km (0.106 R)
- M74: 36,134,767 km (0.09 R)
- M75: 37,008,120 km (0.083 R)
- M76: 37,968,987 km (0.071 R)
- M77: 38,371,704 km (0.106 R)
- M78: 38,452,337 km (0.096 R)
- M79: 38,937,932 km (0.105 R)
- M80: 40,160,596 km (0.119 R)
- M81: 40,324,555 km (0.091 R)
- M82: 41,727,184 km (0.034 R)
- M83: 44,665,287 km (0.112 R)
- M84: 45,516,798 km (0.071 R)
- M85: 46,545,881 km (0.078 R)
- M86: 48,452,207 km (0.116 R)
- M87: 51,092,759 km (0.108 R)
- M88: 51,626,524 km (0.091 R)
- M89: 52,609,682 km (0.097 R)
- M90: 53,599,122 km (0.095 R)
- M91: 55,140,279 km (0.055 R)
- M92: 60,789,095 km (0.106 R)
- M93: 61,354,575 km (0.076 R)
Planet 8 - Ice Giant
Semi-Major Axis: 19 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 656.8
Radius: 5.4
Gravity: 22.52 G
Time & Orbit
Eccentricity (e): 0.087
Orbit Range: 17.35 AU - 20.65 AU
Year: 31886 Days
Day: 22.7 Hours
Environment
Temp: -200 °C
Axial Tilt: 49.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (93)
Outer Limit: 102,395,430 km
- M1: 1,044,044 km (0.108 R)
- M2: 1,143,227 km (0.111 R)
- M3: 1,211,294 km (0.114 R)
- M4: 1,245,701 km (0.096 R)
- M5: 1,351,168 km (0.118 R)
- M6: 1,608,776 km (0.054 R)
- M7: 2,693,061 km (0.097 R)
- M8: 2,738,389 km (0.083 R)
- M9: 3,206,481 km (0.114 R)
- M10: 4,162,411 km (0.072 R)
- M11: 5,256,121 km (0.063 R)
- M12: 5,542,751 km (0.114 R)
- M13: 7,622,610 km (0.029 R)
- M14: 7,946,938 km (0.117 R)
- M15: 9,082,685 km (0.084 R)
- M16: 9,495,575 km (0.094 R)
- M17: 10,554,429 km (0.083 R)
- M18: 11,724,434 km (0.086 R)
- M19: 11,798,934 km (0.108 R)
- M20: 11,873,583 km (0.035 R)
- M21: 12,023,330 km (0.116 R)
- M22: 13,399,182 km (0.078 R)
- M23: 13,633,303 km (0.086 R)
- M24: 14,503,214 km (0.098 R)
- M25: 15,472,609 km (0.099 R)
- M26: 15,554,439 km (0.086 R)
- M27: 15,800,378 km (0.115 R)
- M28: 16,047,812 km (0.032 R)
- M29: 17,134,192 km (0.108 R)
- M30: 17,218,865 km (0.073 R)
- M31: 18,764,510 km (0.092 R)
- M32: 19,026,456 km (0.065 R)
- M33: 19,377,412 km (0.062 R)
- M34: 20,264,528 km (0.117 R)
- M35: 21,437,375 km (0.088 R)
- M36: 21,711,139 km (0.057 R)
- M37: 22,724,964 km (0.104 R)
- M38: 24,131,932 km (0.108 R)
- M39: 24,989,726 km (0.107 R)
- M40: 25,470,533 km (0.066 R)
- M41: 28,019,532 km (0.041 R)
- M42: 28,218,946 km (0.107 R)
- M43: 29,831,162 km (0.111 R)
- M44: 29,933,038 km (0.096 R)
- M45: 30,034,914 km (0.069 R)
- M46: 31,473,148 km (0.108 R)
- M47: 31,680,491 km (0.103 R)
- M48: 33,038,989 km (0.101 R)
- M49: 34,951,149 km (0.068 R)
- M50: 35,704,374 km (0.114 R)
- M51: 36,028,852 km (0.098 R)
- M52: 36,245,619 km (0.046 R)
- M53: 36,462,985 km (0.109 R)
- M54: 38,437,976 km (0.078 R)
- M55: 40,898,562 km (0.103 R)
- M56: 43,409,712 km (0.075 R)
- M57: 43,640,392 km (0.102 R)
- M58: 45,267,119 km (0.119 R)
- M59: 46,323,280 km (0.098 R)
- M60: 49,419,507 km (0.08 R)
- M61: 50,385,610 km (0.095 R)
- M62: 51,846,433 km (0.105 R)
- M63: 55,684,067 km (0.07 R)
- M64: 57,193,959 km (0.119 R)
- M65: 60,125,479 km (0.081 R)
- M66: 61,156,507 km (0.108 R)
- M67: 61,285,760 km (0.113 R)
- M68: 62,453,371 km (0.111 R)
- M69: 64,152,952 km (0.039 R)
- M70: 64,810,734 km (0.059 R)
- M71: 67,330,411 km (0.084 R)
- M72: 68,132,854 km (0.084 R)
- M73: 69,747,015 km (0.087 R)
- M74: 69,882,102 km (0.117 R)
- M75: 71,918,728 km (0.079 R)
- M76: 73,150,068 km (0.101 R)
- M77: 74,388,289 km (0.05 R)
- M78: 75,772,369 km (0.119 R)
- M79: 76,189,148 km (0.066 R)
- M80: 78,144,542 km (0.103 R)
- M81: 81,961,981 km (0.109 R)
- M82: 83,534,553 km (0.083 R)
- M83: 84,252,623 km (0.078 R)
- M84: 84,396,536 km (0.088 R)
- M85: 84,540,449 km (0.119 R)
- M86: 86,854,729 km (0.107 R)
- M87: 87,145,547 km (0.105 R)
- M88: 87,582,223 km (0.093 R)
- M89: 88,019,647 km (0.029 R)
- M90: 88,750,433 km (0.034 R)
- M91: 89,189,802 km (0.105 R)
- M92: 91,989,376 km (0.113 R)
- M93: 94,817,524 km (0.104 R)
Kuiper Belt
Range: 30 - 53 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 449 - 13,491 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.