Star System Generated (Seed: 1768215867)
Star Details
Spectral Class: M8V
Temperature: 2,617 K
Mass: 0.28 sol
Luminosity: 0.01 lux
Habitable Zone (HZ)
Inner Boundary: 0.1 AU
Outer Boundary: 0.14 AU
Physical Limits
Snow Line: 0.48 AU
Max System Radius: 10.6 AU
Planetary System (7 Planets)
Planet 1 - Gas Giant
Semi-Major Axis: 0.56 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 972.9
Radius: 9.6
Gravity: 10.56 G
Time & Orbit
Eccentricity (e): 0.222
Orbit Range: 0.44 AU - 0.68 AU
Year: 289 Days
Day: 5.7 Hours
Environment
Temp: -147 °C
Axial Tilt: 38.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (44)
Outer Limit: 56,818,233 km
- M1: 124,316 km (0.1 R)
- M2: 186,848 km (0.096 R)
- M3: 253,269 km (0.084 R)
- M4: 325,525 km (0.12 R)
- M5: 401,670 km (0.053 R)
- M6: 463,903 km (0.061 R)
- M7: 631,004 km (0.068 R)
- M8: 709,543 km (0.086 R)
- M9: 780,452 km (0.059 R)
- M10: 850,015 km (0.051 R)
- M11: 979,268 km (0.108 R)
- M12: 1,089,372 km (0.073 R)
- M13: 1,317,658 km (0.113 R)
- M14: 1,392,457 km (0.091 R)
- M15: 1,502,711 km (0.07 R)
- M16: 1,586,186 km (0.117 R)
- M17: 1,763,011 km (0.099 R)
- M18: 1,851,274 km (0.119 R)
- M19: 2,097,661 km (0.1 R)
- M20: 2,213,749 km (0.077 R)
- M21: 2,343,451 km (0.059 R)
- M22: 2,563,210 km (0.076 R)
- M23: 2,639,954 km (0.062 R)
- M24: 2,705,477 km (0.101 R)
- M25: 2,771,600 km (0.118 R)
- M26: 2,868,838 km (0.064 R)
- M27: 2,942,441 km (0.082 R)
- M28: 3,022,924 km (0.034 R)
- M29: 3,160,853 km (0.057 R)
- M30: 3,371,786 km (0.072 R)
- M31: 3,456,160 km (0.042 R)
- M32: 3,574,192 km (0.059 R)
- M33: 3,706,886 km (0.07 R)
- M34: 3,793,952 km (0.078 R)
- M35: 3,888,647 km (0.053 R)
- M36: 4,004,585 km (0.096 R)
- M37: 4,142,515 km (0.043 R)
- M38: 4,225,990 km (0.118 R)
- M39: 4,303,183 km (0.114 R)
- M40: 4,487,188 km (0.075 R)
- M41: 4,551,515 km (0.042 R)
- M42: 4,710,089 km (0.115 R)
- M43: 4,811,816 km (0.099 R)
- M44: 4,907,109 km (0.098 R)
Planet 2 - Gas Giant
Semi-Major Axis: 0.72 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 847.3
Radius: 8.6
Gravity: 11.46 G
Time & Orbit
Eccentricity (e): 0.01
Orbit Range: 0.71 AU - 0.73 AU
Year: 422 Days
Day: 8.5 Hours
Environment
Temp: -166 °C
Axial Tilt: 1.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (53)
Outer Limit: 56,818,233 km
- M1: 128,355 km (0.118 R)
- M2: 206,146 km (0.059 R)
- M3: 266,883 km (0.052 R)
- M4: 384,317 km (0.065 R)
- M5: 452,234 km (0.096 R)
- M6: 517,609 km (0.075 R)
- M7: 610,359 km (0.098 R)
- M8: 675,584 km (0.074 R)
- M9: 1,044,044 km (0.034 R)
- M10: 1,098,647 km (0.112 R)
- M11: 1,154,297 km (0.119 R)
- M12: 1,397,394 km (0.074 R)
- M13: 1,469,201 km (0.116 R)
- M14: 1,542,204 km (0.115 R)
- M15: 1,604,886 km (0.111 R)
- M16: 1,786,498 km (0.119 R)
- M17: 1,901,239 km (0.067 R)
- M18: 1,993,541 km (0.11 R)
- M19: 2,055,924 km (0.112 R)
- M20: 2,170,067 km (0.047 R)
- M21: 2,234,244 km (0.076 R)
- M22: 2,312,185 km (0.086 R)
- M23: 2,384,590 km (0.081 R)
- M24: 2,471,058 km (0.109 R)
- M25: 2,544,959 km (0.072 R)
- M26: 2,715,949 km (0.058 R)
- M27: 2,869,437 km (0.108 R)
- M28: 2,954,408 km (0.111 R)
- M29: 3,054,789 km (0.075 R)
- M30: 3,422,051 km (0.118 R)
- M31: 3,557,737 km (0.093 R)
- M32: 3,633,882 km (0.086 R)
- M33: 3,710,626 km (0.079 R)
- M34: 3,772,410 km (0.077 R)
- M35: 3,826,714 km (0.098 R)
- M36: 3,936,219 km (0.071 R)
- M37: 4,070,558 km (0.107 R)
- M38: 4,246,784 km (0.064 R)
- M39: 4,311,411 km (0.114 R)
- M40: 4,490,928 km (0.066 R)
- M41: 4,706,499 km (0.063 R)
- M42: 4,874,497 km (0.107 R)
- M43: 5,001,805 km (0.115 R)
- M44: 5,061,644 km (0.114 R)
- M45: 5,164,717 km (0.113 R)
- M46: 5,364,430 km (0.089 R)
- M47: 5,504,753 km (0.083 R)
- M48: 5,717,481 km (0.101 R)
- M49: 5,771,187 km (0.078 R)
- M50: 5,878,897 km (0.07 R)
- M51: 6,032,833 km (0.086 R)
- M52: 6,096,562 km (0.088 R)
- M53: 6,169,566 km (0.115 R)
Planet 3 - Gas Giant
Semi-Major Axis: 1.72 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 369.7
Radius: 10.2
Gravity: 3.55 G
Time & Orbit
Eccentricity (e): 0.019
Orbit Range: 1.69 AU - 1.75 AU
Year: 1557 Days
Day: 5.9 Hours
Environment
Temp: -194 °C
Axial Tilt: 12.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (56)
Outer Limit: 56,818,233 km
- M1: 153,787 km (0.057 R)
- M2: 270,922 km (0.107 R)
- M3: 342,579 km (0.098 R)
- M4: 413,489 km (0.077 R)
- M5: 517,758 km (0.112 R)
- M6: 585,376 km (0.101 R)
- M7: 699,370 km (0.05 R)
- M8: 769,232 km (0.118 R)
- M9: 848,370 km (0.073 R)
- M10: 1,015,470 km (0.076 R)
- M11: 1,103,434 km (0.076 R)
- M12: 1,279,361 km (0.102 R)
- M13: 1,431,801 km (0.099 R)
- M14: 1,506,151 km (0.037 R)
- M15: 1,693,747 km (0.072 R)
- M16: 1,907,223 km (0.043 R)
- M17: 2,035,877 km (0.102 R)
- M18: 2,129,526 km (0.085 R)
- M19: 2,243,968 km (0.08 R)
- M20: 2,846,997 km (0.103 R)
- M21: 2,952,164 km (0.11 R)
- M22: 3,048,057 km (0.064 R)
- M23: 3,123,454 km (0.117 R)
- M24: 3,232,062 km (0.12 R)
- M25: 3,633,882 km (0.056 R)
- M26: 3,852,444 km (0.054 R)
- M27: 4,063,527 km (0.082 R)
- M28: 4,583,230 km (0.066 R)
- M29: 4,682,264 km (0.117 R)
- M30: 4,857,293 km (0.116 R)
- M31: 5,034,567 km (0.076 R)
- M32: 5,149,608 km (0.085 R)
- M33: 5,343,337 km (0.104 R)
- M34: 6,472,352 km (0.095 R)
- M35: 6,541,915 km (0.07 R)
- M36: 7,078,373 km (0.096 R)
- M37: 7,149,881 km (0.114 R)
- M38: 7,250,710 km (0.112 R)
- M39: 7,468,075 km (0.111 R)
- M40: 7,599,572 km (0.11 R)
- M41: 7,953,969 km (0.055 R)
- M42: 8,298,643 km (0.099 R)
- M43: 8,541,440 km (0.059 R)
- M44: 8,694,329 km (0.053 R)
- M45: 8,771,073 km (0.088 R)
- M46: 8,848,116 km (0.057 R)
- M47: 8,940,866 km (0.104 R)
- M48: 9,142,823 km (0.102 R)
- M49: 9,236,621 km (0.095 R)
- M50: 9,757,970 km (0.09 R)
- M51: 10,014,231 km (0.111 R)
- M52: 10,305,199 km (0.096 R)
- M53: 10,386,431 km (0.082 R)
- M54: 10,615,315 km (0.073 R)
- M55: 10,845,846 km (0.106 R)
- M56: 11,127,987 km (0.094 R)
Planet 4 - Gas Giant
Semi-Major Axis: 2.17 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 369.4
Radius: 10.9
Gravity: 3.11 G
Time & Orbit
Eccentricity (e): 0.198
Orbit Range: 1.74 AU - 2.6 AU
Year: 2206 Days
Day: 12.3 Hours
Environment
Temp: -193 °C
Axial Tilt: 155.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (65)
Outer Limit: 56,818,233 km
- M1: 178,470 km (0.102 R)
- M2: 257,009 km (0.103 R)
- M3: 363,972 km (0.077 R)
- M4: 491,429 km (0.096 R)
- M5: 629,508 km (0.105 R)
- M6: 714,779 km (0.062 R)
- M7: 930,798 km (0.07 R)
- M8: 1,038,658 km (0.092 R)
- M9: 1,168,509 km (0.095 R)
- M10: 1,532,481 km (0.085 R)
- M11: 1,805,048 km (0.061 R)
- M12: 1,931,309 km (0.098 R)
- M13: 2,017,028 km (0.098 R)
- M14: 2,126,235 km (0.037 R)
- M15: 2,316,523 km (0.113 R)
- M16: 2,419,446 km (0.035 R)
- M17: 2,524,165 km (0.108 R)
- M18: 2,618,412 km (0.041 R)
- M19: 2,822,762 km (0.117 R)
- M20: 2,920,749 km (0.106 R)
- M21: 3,311,349 km (0.102 R)
- M22: 3,454,065 km (0.1 R)
- M23: 4,366,762 km (0.119 R)
- M24: 4,509,179 km (0.049 R)
- M25: 4,711,286 km (0.045 R)
- M26: 5,229,642 km (0.115 R)
- M27: 5,595,559 km (0.107 R)
- M28: 5,719,426 km (0.07 R)
- M29: 6,048,840 km (0.069 R)
- M30: 6,449,314 km (0.089 R)
- M31: 6,611,777 km (0.084 R)
- M32: 6,693,607 km (0.098 R)
- M33: 6,775,736 km (0.116 R)
- M34: 6,924,586 km (0.113 R)
- M35: 7,057,579 km (0.052 R)
- M36: 7,309,502 km (0.093 R)
- M37: 7,615,728 km (0.106 R)
- M38: 7,736,005 km (0.056 R)
- M39: 8,276,053 km (0.119 R)
- M40: 8,364,316 km (0.051 R)
- M41: 8,435,076 km (0.077 R)
- M42: 8,613,097 km (0.084 R)
- M43: 8,756,412 km (0.09 R)
- M44: 9,009,083 km (0.082 R)
- M45: 9,081,638 km (0.114 R)
- M46: 9,521,605 km (0.104 R)
- M47: 9,706,957 km (0.115 R)
- M48: 9,874,806 km (0.115 R)
- M49: 10,118,950 km (0.054 R)
- M50: 10,251,344 km (0.12 R)
- M51: 10,422,334 km (0.094 R)
- M52: 10,594,222 km (0.054 R)
- M53: 11,174,063 km (0.084 R)
- M54: 11,291,348 km (0.099 R)
- M55: 11,704,837 km (0.119 R)
- M56: 11,923,399 km (0.116 R)
- M57: 12,143,458 km (0.077 R)
- M58: 12,324,321 km (0.106 R)
- M59: 12,506,232 km (0.081 R)
- M60: 12,587,314 km (0.1 R)
- M61: 12,750,077 km (0.111 R)
- M62: 13,491,185 km (0.048 R)
- M63: 13,678,781 km (0.108 R)
- M64: 13,951,049 km (0.048 R)
- M65: 14,225,112 km (0.106 R)
Planet 5 - Gas Giant
Semi-Major Axis: 2.77 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 569.7
Radius: 12
Gravity: 3.96 G
Time & Orbit
Eccentricity (e): 0.19
Orbit Range: 2.24 AU - 3.3 AU
Year: 3182 Days
Day: 14.7 Hours
Environment
Temp: -213 °C
Axial Tilt: 17.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (73)
Outer Limit: 56,818,233 km
- M1: 164,109 km (0.105 R)
- M2: 335,249 km (0.119 R)
- M3: 552,315 km (0.117 R)
- M4: 639,082 km (0.115 R)
- M5: 789,278 km (0.114 R)
- M6: 889,659 km (0.115 R)
- M7: 1,016,368 km (0.047 R)
- M8: 1,115,851 km (0.107 R)
- M9: 1,230,293 km (0.089 R)
- M10: 1,336,956 km (0.102 R)
- M11: 1,534,725 km (0.119 R)
- M12: 2,113,968 km (0.057 R)
- M13: 2,316,673 km (0.103 R)
- M14: 2,962,935 km (0.109 R)
- M15: 3,043,569 km (0.087 R)
- M16: 3,223,535 km (0.074 R)
- M17: 3,373,582 km (0.098 R)
- M18: 3,611,442 km (0.036 R)
- M19: 3,715,114 km (0.109 R)
- M20: 3,854,988 km (0.085 R)
- M21: 4,014,459 km (0.106 R)
- M22: 4,157,923 km (0.111 R)
- M23: 4,413,436 km (0.09 R)
- M24: 4,730,584 km (0.104 R)
- M25: 5,868,126 km (0.068 R)
- M26: 6,010,992 km (0.08 R)
- M27: 6,258,726 km (0.106 R)
- M28: 6,488,658 km (0.094 R)
- M29: 6,657,704 km (0.105 R)
- M30: 6,978,591 km (0.025 R)
- M31: 7,392,528 km (0.066 R)
- M32: 7,547,063 km (0.112 R)
- M33: 7,881,713 km (0.069 R)
- M34: 8,062,278 km (0.086 R)
- M35: 8,221,301 km (0.103 R)
- M36: 8,312,705 km (0.105 R)
- M37: 8,798,000 km (0.096 R)
- M38: 8,891,499 km (0.054 R)
- M39: 9,221,362 km (0.062 R)
- M40: 9,435,586 km (0.037 R)
- M41: 9,966,210 km (0.077 R)
- M42: 10,112,517 km (0.12 R)
- M43: 10,531,241 km (0.09 R)
- M44: 10,880,403 km (0.115 R)
- M45: 10,980,783 km (0.104 R)
- M46: 11,411,176 km (0.118 R)
- M47: 11,795,493 km (0.099 R)
- M48: 11,898,715 km (0.09 R)
- M49: 12,210,178 km (0.118 R)
- M50: 12,288,567 km (0.108 R)
- M51: 12,603,321 km (0.106 R)
- M52: 13,536,812 km (0.035 R)
- M53: 13,617,894 km (0.088 R)
- M54: 14,217,183 km (0.078 R)
- M55: 14,382,190 km (0.064 R)
- M56: 14,658,647 km (0.071 R)
- M57: 14,992,549 km (0.082 R)
- M58: 15,188,522 km (0.03 R)
- M59: 15,469,916 km (0.11 R)
- M60: 15,724,831 km (0.094 R)
- M61: 16,468,631 km (0.082 R)
- M62: 16,612,993 km (0.049 R)
- M63: 16,874,041 km (0.096 R)
- M64: 16,990,429 km (0.112 R)
- M65: 17,517,611 km (0.101 R)
- M66: 17,931,399 km (0.114 R)
- M67: 18,020,410 km (0.118 R)
- M68: 18,318,409 km (0.117 R)
- M69: 18,587,984 km (0.106 R)
- M70: 18,949,562 km (0.104 R)
- M71: 19,496,193 km (0.087 R)
- M72: 20,202,295 km (0.099 R)
- M73: 20,792,010 km (0.111 R)
Planet 6 - Gas Giant
Semi-Major Axis: 3.56 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 16.5
Radius: 14.8
Gravity: 0.08 G
Time & Orbit
Eccentricity (e): 0.201
Orbit Range: 2.84 AU - 4.28 AU
Year: 4636 Days
Day: 8.8 Hours
Environment
Temp: -222 °C
Axial Tilt: 23 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (29)
Outer Limit: 56,818,233 km
- M1: 234,869 km (0.063 R)
- M2: 337,493 km (0.104 R)
- M3: 483,949 km (0.051 R)
- M4: 818,899 km (0.089 R)
- M5: 1,228,199 km (0.033 R)
- M6: 1,906,326 km (0.078 R)
- M7: 2,016,430 km (0.066 R)
- M8: 2,220,032 km (0.049 R)
- M9: 2,375,315 km (0.102 R)
- M10: 2,574,879 km (0.071 R)
- M11: 2,905,939 km (0.072 R)
- M12: 3,007,964 km (0.112 R)
- M13: 3,145,894 km (0.062 R)
- M14: 3,392,730 km (0.119 R)
- M15: 3,673,525 km (0.099 R)
- M16: 3,784,228 km (0.109 R)
- M17: 4,075,644 km (0.071 R)
- M18: 4,345,369 km (0.041 R)
- M19: 4,443,057 km (0.105 R)
- M20: 4,973,680 km (0.075 R)
- M21: 5,262,255 km (0.112 R)
- M22: 5,535,121 km (0.05 R)
- M23: 5,888,471 km (0.112 R)
- M24: 6,381,995 km (0.045 R)
- M25: 6,639,602 km (0.106 R)
- M26: 7,199,697 km (0.082 R)
- M27: 7,292,597 km (0.106 R)
- M28: 7,385,946 km (0.102 R)
- M29: 7,834,740 km (0.065 R)
Planet 7 - Ice Giant
Semi-Major Axis: 6.23 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 990.3
Radius: 3.3
Gravity: 90.94 G
Time & Orbit
Eccentricity (e): 0.163
Orbit Range: 5.21 AU - 7.25 AU
Year: 10734 Days
Day: 24.2 Hours
Environment
Temp: -221 °C
Axial Tilt: 39 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (96)
Outer Limit: 56,818,233 km
- M1: 135,087 km (0.082 R)
- M2: 252,072 km (0.117 R)
- M3: 381,475 km (0.102 R)
- M4: 428,897 km (0.032 R)
- M5: 582,983 km (0.084 R)
- M6: 773,421 km (0.112 R)
- M7: 1,070,074 km (0.12 R)
- M8: 1,277,865 km (0.05 R)
- M9: 1,809,685 km (0.107 R)
- M10: 2,084,198 km (0.096 R)
- M11: 2,550,195 km (0.103 R)
- M12: 2,826,053 km (0.107 R)
- M13: 3,881,018 km (0.073 R)
- M14: 3,985,586 km (0.073 R)
- M15: 4,020,742 km (0.088 R)
- M16: 4,558,846 km (0.04 R)
- M17: 4,892,598 km (0.108 R)
- M18: 5,157,536 km (0.107 R)
- M19: 6,426,725 km (0.092 R)
- M20: 7,138,212 km (0.071 R)
- M21: 7,481,539 km (0.112 R)
- M22: 7,611,689 km (0.095 R)
- M23: 8,184,350 km (0.118 R)
- M24: 9,277,312 km (0.118 R)
- M25: 9,510,834 km (0.04 R)
- M26: 10,078,857 km (0.074 R)
- M27: 10,270,642 km (0.098 R)
- M28: 10,463,623 km (0.105 R)
- M29: 11,000,679 km (0.092 R)
- M30: 11,898,416 km (0.026 R)
- M31: 12,612,746 km (0.041 R)
- M32: 13,079,342 km (0.086 R)
- M33: 13,393,497 km (0.089 R)
- M34: 14,243,363 km (0.077 R)
- M35: 15,165,335 km (0.06 R)
- M36: 15,772,104 km (0.112 R)
- M37: 17,409,303 km (0.078 R)
- M38: 17,524,194 km (0.104 R)
- M39: 17,812,618 km (0.112 R)
- M40: 19,635,020 km (0.03 R)
- M41: 19,814,388 km (0.117 R)
- M42: 20,054,642 km (0.117 R)
- M43: 20,537,843 km (0.06 R)
- M44: 20,659,167 km (0.051 R)
- M45: 21,639,033 km (0.058 R)
- M46: 22,258,966 km (0.083 R)
- M47: 23,010,696 km (0.117 R)
- M48: 23,326,347 km (0.11 R)
- M49: 23,516,486 km (0.109 R)
- M50: 23,898,110 km (0.092 R)
- M51: 25,575,701 km (0.077 R)
- M52: 26,825,441 km (0.11 R)
- M53: 27,224,269 km (0.119 R)
- M54: 28,432,272 km (0.035 R)
- M55: 28,703,194 km (0.081 R)
- M56: 28,838,879 km (0.1 R)
- M57: 30,207,849 km (0.109 R)
- M58: 30,553,420 km (0.079 R)
- M59: 31,039,464 km (0.037 R)
- M60: 31,597,913 km (0.09 R)
- M61: 31,667,924 km (0.065 R)
- M62: 32,583,314 km (0.095 R)
- M63: 32,937,711 km (0.103 R)
- M64: 34,367,867 km (0.11 R)
- M65: 34,439,823 km (0.112 R)
- M66: 36,845,208 km (0.099 R)
- M67: 36,992,711 km (0.098 R)
- M68: 38,030,771 km (0.043 R)
- M69: 38,105,270 km (0.111 R)
- M70: 39,003,157 km (0.093 R)
- M71: 39,078,405 km (0.12 R)
- M72: 39,756,831 km (0.11 R)
- M73: 39,908,074 km (0.117 R)
- M74: 40,059,617 km (0.119 R)
- M75: 40,363,151 km (0.039 R)
- M76: 41,661,810 km (0.113 R)
- M77: 42,974,083 km (0.105 R)
- M78: 43,518,320 km (0.072 R)
- M79: 43,908,471 km (0.112 R)
- M80: 43,986,561 km (0.082 R)
- M81: 44,064,801 km (0.078 R)
- M82: 44,849,591 km (0.052 R)
- M83: 44,928,280 km (0.117 R)
- M84: 46,432,785 km (0.111 R)
- M85: 47,071,269 km (0.102 R)
- M86: 48,841,760 km (0.111 R)
- M87: 49,409,783 km (0.117 R)
- M88: 49,653,777 km (0.061 R)
- M89: 50,634,092 km (0.112 R)
- M90: 50,962,160 km (0.077 R)
- M91: 51,703,118 km (0.072 R)
- M92: 52,199,185 km (0.112 R)
- M93: 52,447,667 km (0.082 R)
- M94: 53,612,885 km (0.114 R)
- M95: 55,123,524 km (0.097 R)
- M96: 55,630,063 km (0.118 R)
Kuiper Belt
Range: 30 - 59 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 246 - 11,189 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.