🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.32 AU

Composition

Type: Inner System (Rocky)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.63 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.4

Radius: 1.42

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.113

Orbit Range: 0.56 AU - 0.7 AU

Year: 176 Days

Day: 33.6 Hours

Environment

Temp: 197 °C

Axial Tilt: 1 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.02 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.67

Radius: 1.85

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.25

Orbit Range: 0.77 AU - 1.28 AU

Year: 362 Days

Day: 13 Hours

Environment

Temp: 168 °C

Axial Tilt: 31.9 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 86,655,048 km

• M1: 382,671 km (0.037 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.48 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.53

Radius: 0.78

Gravity: 0.87 G

Time & Orbit

Eccentricity (e): 0.097

Orbit Range: 1.34 AU - 1.62 AU

Year: 633 Days

Day: 13 Hours

Environment

Temp: -11 °C

Axial Tilt: 49.8 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 4 - Terrestrial

Semi-Major Axis: 1.61 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.83

Radius: 1.71

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.106

Orbit Range: 1.44 AU - 1.78 AU

Year: 718 Days

Day: 45.4 Hours

Environment

Temp: -23 °C

Axial Tilt: 46 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 2.47 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.64

Radius: 0.84

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.041

Orbit Range: 2.37 AU - 2.57 AU

Year: 1364 Days

Day: 19.4 Hours

Environment

Temp: -68 °C

Axial Tilt: 17 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 5.9 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 239.5

Radius: 13

Gravity: 1.42 G

Time & Orbit

Eccentricity (e): 0.014

Orbit Range: 5.82 AU - 5.98 AU

Year: 5037 Days

Day: 11.4 Hours

Environment

Temp: -141 °C

Axial Tilt: 4.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (64)

Outer Limit: 86,655,048 km

• M1: 179,817 km (0.066 R)
• M2: 384,766 km (0.084 R)
• M3: 465,698 km (0.102 R)
• M4: 563,086 km (0.115 R)
• M5: 669,002 km (0.102 R)
• M6: 792,719 km (0.068 R)
• M7: 883,525 km (0.1 R)
• M8: 978,220 km (0.107 R)
• M9: 1,320,949 km (0.065 R)
• M10: 1,494,034 km (0.097 R)
• M11: 1,836,164 km (0.061 R)
• M12: 1,918,742 km (0.088 R)
• M13: 2,059,215 km (0.119 R)
• M14: 2,291,391 km (0.092 R)
• M15: 2,471,357 km (0.087 R)
• M16: 2,593,877 km (0.118 R)
• M17: 2,765,915 km (0.061 R)
• M18: 2,877,515 km (0.074 R)
• M19: 3,023,074 km (0.075 R)
• M20: 3,457,656 km (0.086 R)
• M21: 3,823,422 km (0.069 R)
• M22: 4,019,994 km (0.046 R)
• M23: 4,535,658 km (0.116 R)
• M24: 4,687,051 km (0.098 R)
• M25: 4,820,791 km (0.105 R)
• M26: 4,975,176 km (0.098 R)
• M27: 5,209,895 km (0.056 R)
• M28: 5,328,676 km (0.105 R)
• M29: 5,488,447 km (0.09 R)
• M30: 5,751,589 km (0.111 R)
• M31: 6,101,948 km (0.089 R)
• M32: 6,206,367 km (0.106 R)
• M33: 6,630,028 km (0.103 R)
• M34: 6,910,374 km (0.045 R)
• M35: 7,483,035 km (0.096 R)
• M36: 7,639,814 km (0.083 R)
• M37: 8,838,691 km (0.054 R)
• M38: 9,219,418 km (0.094 R)
• M39: 10,244,313 km (0.079 R)
• M40: 10,418,594 km (0.087 R)
• M41: 10,745,017 km (0.057 R)
• M42: 11,744,330 km (0.101 R)
• M43: 11,874,630 km (0.046 R)
• M44: 12,136,726 km (0.094 R)
• M45: 12,453,724 km (0.053 R)
• M46: 12,719,858 km (0.074 R)
• M47: 12,853,748 km (0.092 R)
• M48: 13,366,570 km (0.113 R)
• M49: 14,024,052 km (0.051 R)
• M50: 14,440,383 km (0.107 R)
• M51: 15,171,468 km (0.119 R)
• M52: 15,256,739 km (0.097 R)
• M53: 15,456,003 km (0.086 R)
• M54: 15,598,869 km (0.118 R)
• M55: 15,742,184 km (0.056 R)
• M56: 16,116,927 km (0.066 R)
• M57: 16,963,501 km (0.099 R)
• M58: 17,169,946 km (0.08 R)
• M59: 18,852,024 km (0.055 R)
• M60: 19,929,877 km (0.12 R)
• M61: 20,054,343 km (0.095 R)
• M62: 20,617,728 km (0.12 R)
• M63: 20,806,521 km (0.116 R)
• M64: 21,344,923 km (0.073 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 753.5

Radius: 13.8

Gravity: 3.96 G

Time & Orbit

Eccentricity (e): 0.047

Orbit Range: 5.71 AU - 6.27 AU

Year: 5153 Days

Day: 12.3 Hours

Environment

Temp: -137 °C

Axial Tilt: 20.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 86,655,048 km

• M1: 223,948 km (0.044 R)
• M2: 434,133 km (0.077 R)
• M3: 648,208 km (0.071 R)
• M4: 847,472 km (0.053 R)
• M5: 1,112,410 km (0.067 R)
• M6: 1,202,019 km (0.101 R)
• M7: 1,389,016 km (0.105 R)
• M8: 1,688,511 km (0.066 R)
• M9: 2,233,945 km (0.103 R)
• M10: 2,369,032 km (0.071 R)
• M11: 2,688,423 km (0.116 R)
• M12: 2,958,298 km (0.089 R)
• M13: 3,172,073 km (0.043 R)
• M14: 3,502,385 km (0.063 R)
• M15: 3,592,443 km (0.092 R)
• M16: 3,751,915 km (0.111 R)
• M17: 4,101,674 km (0.106 R)
• M18: 4,340,732 km (0.054 R)
• M19: 4,510,825 km (0.109 R)
• M20: 4,633,794 km (0.087 R)
• M21: 5,394,948 km (0.097 R)
• M22: 5,551,876 km (0.068 R)
• M23: 6,497,634 km (0.099 R)
• M24: 6,748,958 km (0.053 R)
• M25: 7,032,147 km (0.117 R)
• M26: 7,348,098 km (0.103 R)
• M27: 7,493,208 km (0.069 R)
• M28: 7,580,722 km (0.074 R)
• M29: 7,875,131 km (0.097 R)
• M30: 8,263,487 km (0.098 R)
• M31: 9,975,336 km (0.102 R)
• M32: 10,071,826 km (0.059 R)
• M33: 10,526,155 km (0.086 R)
• M34: 11,187,078 km (0.1 R)
• M35: 11,421,498 km (0.087 R)
• M36: 12,341,226 km (0.092 R)
• M37: 13,037,903 km (0.113 R)
• M38: 14,034,674 km (0.079 R)
• M39: 14,251,441 km (0.077 R)
• M40: 14,505,758 km (0.111 R)
• M41: 15,352,033 km (0.031 R)
• M42: 15,687,581 km (0.093 R)
• M43: 17,595,552 km (0.034 R)
• M44: 17,986,002 km (0.03 R)
• M45: 18,379,146 km (0.063 R)
• M46: 18,735,637 km (0.075 R)
• M47: 18,894,660 km (0.12 R)
• M48: 19,094,223 km (0.113 R)
• M49: 19,254,293 km (0.036 R)
• M50: 19,374,719 km (0.118 R)
• M51: 19,939,900 km (0.058 R)
• M52: 20,962,701 km (0.111 R)
• M53: 21,252,023 km (0.075 R)
• M54: 22,128,367 km (0.115 R)
• M55: 22,465,262 km (0.055 R)
• M56: 23,229,557 km (0.041 R)
• M57: 23,400,548 km (0.045 R)
• M58: 23,916,212 km (0.034 R)
• M59: 25,002,292 km (0.117 R)
• M60: 25,177,471 km (0.101 R)
• M61: 25,617,439 km (0.071 R)
• M62: 25,882,676 km (0.05 R)
• M63: 27,087,387 km (0.118 R)
• M64: 27,222,474 km (0.054 R)
• M65: 27,628,782 km (0.099 R)
• M66: 27,991,706 km (0.074 R)
• M67: 28,310,499 km (0.107 R)
• M68: 29,043,679 km (0.113 R)
• M69: 29,181,907 km (0.102 R)
• M70: 29,829,666 km (0.071 R)
• M71: 30,248,540 km (0.084 R)
• M72: 30,951,051 km (0.045 R)
• M73: 31,280,765 km (0.119 R)
• M74: 31,706,371 km (0.073 R)

Planet 8 - Gas Giant

Semi-Major Axis: 7.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 518

Radius: 12.1

Gravity: 3.54 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 6.14 AU - 9.4 AU

Year: 7612 Days

Day: 14.3 Hours

Environment

Temp: -153 °C

Axial Tilt: 47.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 86,655,048 km

• M1: 163,361 km (0.045 R)
• M2: 338,839 km (0.11 R)
• M3: 656,884 km (0.118 R)
• M4: 779,255 km (0.119 R)
• M5: 1,064,838 km (0.052 R)
• M6: 1,212,042 km (0.106 R)
• M7: 1,297,014 km (0.094 R)
• M8: 1,455,288 km (0.05 R)
• M9: 1,989,053 km (0.112 R)
• M10: 2,152,414 km (0.087 R)
• M11: 2,536,432 km (0.08 R)
• M12: 2,624,844 km (0.052 R)
• M13: 3,153,224 km (0.07 R)
• M14: 3,417,713 km (0.087 R)
• M15: 3,565,067 km (0.098 R)
• M16: 3,664,549 km (0.078 R)
• M17: 4,149,695 km (0.085 R)
• M18: 4,413,436 km (0.098 R)
• M19: 4,520,399 km (0.092 R)
• M20: 4,709,790 km (0.028 R)
• M21: 4,819,146 km (0.073 R)
• M22: 5,407,664 km (0.039 R)
• M23: 5,930,209 km (0.052 R)
• M24: 6,257,679 km (0.06 R)
• M25: 6,378,105 km (0.039 R)
• M26: 6,806,105 km (0.1 R)
• M27: 7,180,399 km (0.08 R)
• M28: 7,754,555 km (0.065 R)
• M29: 8,643,466 km (0.113 R)
• M30: 8,744,295 km (0.112 R)
• M31: 8,947,000 km (0.112 R)
• M32: 9,219,717 km (0.108 R)
• M33: 9,703,666 km (0.045 R)
• M34: 9,984,012 km (0.104 R)
• M35: 10,125,083 km (0.106 R)
• M36: 10,552,634 km (0.105 R)
• M37: 11,314,835 km (0.07 R)
• M38: 11,982,341 km (0.103 R)
• M39: 12,472,423 km (0.099 R)
• M40: 12,739,156 km (0.111 R)
• M41: 13,785,145 km (0.079 R)
• M42: 14,139,991 km (0.089 R)
• M43: 14,418,093 km (0.097 R)
• M44: 15,263,022 km (0.102 R)
• M45: 15,507,465 km (0.081 R)
• M46: 16,206,985 km (0.034 R)
• M47: 16,331,600 km (0.04 R)
• M48: 16,581,578 km (0.108 R)
• M49: 17,381,627 km (0.078 R)
• M50: 17,509,084 km (0.044 R)
• M51: 18,280,561 km (0.043 R)
• M52: 18,844,545 km (0.12 R)
• M53: 19,019,275 km (0.091 R)
• M54: 19,502,476 km (0.103 R)
• M55: 20,840,928 km (0.115 R)
• M56: 21,384,567 km (0.037 R)
• M57: 21,658,181 km (0.11 R)
• M58: 22,208,851 km (0.099 R)
• M59: 22,903,733 km (0.101 R)
• M60: 23,277,279 km (0.072 R)
• M61: 24,267,318 km (0.115 R)
• M62: 24,743,637 km (0.104 R)
• M63: 25,608,762 km (0.112 R)
• M64: 26,434,841 km (0.116 R)
• M65: 26,728,502 km (0.094 R)
• M66: 26,924,924 km (0.084 R)
• M67: 27,220,380 km (0.086 R)
• M68: 27,665,733 km (0.108 R)
• M69: 28,013,697 km (0.046 R)
• M70: 28,764,230 km (0.044 R)
• M71: 29,116,682 km (0.112 R)
• M72: 31,884,093 km (0.12 R)
• M73: 32,772,555 km (0.095 R)
• M74: 33,193,524 km (0.109 R)
• M75: 33,669,095 km (0.117 R)
• M76: 34,948,755 km (0.094 R)
• M77: 36,135,515 km (0.11 R)
• M78: 36,352,731 km (0.097 R)

Planet 9 - Gas Giant

Semi-Major Axis: 8.41 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 708.3

Radius: 12.6

Gravity: 4.46 G

Time & Orbit

Eccentricity (e): 0.133

Orbit Range: 7.29 AU - 9.53 AU

Year: 8572 Days

Day: 12.5 Hours

Environment

Temp: -155 °C

Axial Tilt: 37.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 86,655,048 km

• M1: 270,772 km (0.044 R)
• M2: 360,830 km (0.113 R)
• M3: 586,723 km (0.111 R)
• M4: 862,282 km (0.106 R)
• M5: 1,142,778 km (0.113 R)
• M6: 1,333,366 km (0.12 R)
• M7: 1,576,462 km (0.091 R)
• M8: 1,834,219 km (0.091 R)
• M9: 2,175,901 km (0.034 R)
• M10: 2,488,710 km (0.113 R)
• M11: 2,919,851 km (0.037 R)
• M12: 3,319,876 km (0.11 R)
• M13: 3,429,531 km (0.083 R)
• M14: 3,568,358 km (0.034 R)
• M15: 3,680,856 km (0.096 R)
• M16: 3,938,314 km (0.091 R)
• M17: 4,054,701 km (0.104 R)
• M18: 4,142,814 km (0.1 R)
• M19: 4,320,835 km (0.037 R)
• M20: 4,440,813 km (0.078 R)
• M21: 4,901,275 km (0.102 R)
• M22: 5,312,819 km (0.038 R)
• M23: 7,461,493 km (0.101 R)
• M24: 8,119,873 km (0.081 R)
• M25: 8,418,471 km (0.107 R)
• M26: 8,949,693 km (0.109 R)
• M27: 9,374,850 km (0.083 R)
• M28: 9,688,108 km (0.084 R)
• M29: 9,885,726 km (0.078 R)
• M30: 11,264,720 km (0.066 R)
• M31: 11,556,136 km (0.118 R)
• M32: 12,019,142 km (0.118 R)
• M33: 12,531,066 km (0.117 R)
• M34: 12,617,084 km (0.045 R)
• M35: 12,789,720 km (0.053 R)
• M36: 13,181,218 km (0.052 R)
• M37: 14,423,927 km (0.096 R)
• M38: 16,216,559 km (0.104 R)
• M39: 16,687,493 km (0.073 R)
• M40: 18,224,761 km (0.035 R)
• M41: 18,862,048 km (0.097 R)
• M42: 19,907,138 km (0.07 R)
• M43: 20,209,176 km (0.116 R)
• M44: 20,411,433 km (0.044 R)
• M45: 20,563,424 km (0.088 R)
• M46: 21,175,728 km (0.119 R)
• M47: 21,742,106 km (0.059 R)
• M48: 23,630,629 km (0.117 R)
• M49: 24,057,432 km (0.098 R)
• M50: 24,594,488 km (0.101 R)
• M51: 24,918,667 km (0.109 R)
• M52: 25,353,099 km (0.118 R)
• M53: 25,462,006 km (0.06 R)
• M54: 25,680,569 km (0.086 R)
• M55: 26,119,339 km (0.114 R)
• M56: 26,284,495 km (0.059 R)
• M57: 27,338,712 km (0.087 R)
• M58: 27,450,611 km (0.105 R)
• M59: 28,180,948 km (0.096 R)
• M60: 28,633,481 km (0.119 R)
• M61: 28,974,564 km (0.053 R)
• M62: 30,236,572 km (0.098 R)
• M63: 30,641,833 km (0.111 R)
• M64: 32,162,944 km (0.09 R)
• M65: 32,458,250 km (0.088 R)
• M66: 33,588,911 km (0.056 R)
• M67: 34,792,874 km (0.114 R)
• M68: 35,888,529 km (0.091 R)
• M69: 36,010,900 km (0.116 R)
• M70: 36,256,241 km (0.1 R)
• M71: 36,563,664 km (0.107 R)
• M72: 38,238,562 km (0.084 R)
• M73: 39,558,464 km (0.075 R)
• M74: 39,748,304 km (0.094 R)
• M75: 40,255,889 km (0.077 R)
• M76: 41,598,530 km (0.05 R)
• M77: 42,178,372 km (0.06 R)
• M78: 42,890,757 km (0.108 R)
• M79: 43,672,406 km (0.105 R)

Planet 10 - Ice Giant

Semi-Major Axis: 19.89 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 416.4

Radius: 7.4

Gravity: 7.6 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 16.61 AU - 23.17 AU

Year: 31177 Days

Day: 16.3 Hours

Environment

Temp: -186 °C

Axial Tilt: 12.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 86,655,048 km

• M1: 153,936 km (0.101 R)
• M2: 251,025 km (0.093 R)
• M3: 454,927 km (0.093 R)
• M4: 974,032 km (0.103 R)
• M5: 1,059,901 km (0.068 R)
• M6: 2,237,236 km (0.113 R)
• M7: 2,429,170 km (0.113 R)
• M8: 2,626,639 km (0.082 R)
• M9: 2,995,249 km (0.052 R)
• M10: 3,164,294 km (0.066 R)
• M11: 3,467,828 km (0.097 R)
• M12: 4,921,022 km (0.037 R)
• M13: 5,120,885 km (0.088 R)
• M14: 5,528,539 km (0.041 R)
• M15: 6,105,987 km (0.076 R)
• M16: 6,320,809 km (0.097 R)
• M17: 8,126,605 km (0.096 R)
• M18: 8,303,579 km (0.052 R)
• M19: 11,173,166 km (0.12 R)
• M20: 11,304,214 km (0.097 R)
• M21: 11,435,860 km (0.1 R)
• M22: 11,833,940 km (0.103 R)
• M23: 12,917,327 km (0.109 R)
• M24: 13,262,450 km (0.096 R)
• M25: 14,960,685 km (0.102 R)
• M26: 15,982,438 km (0.113 R)
• M27: 16,726,089 km (0.072 R)
• M28: 16,801,038 km (0.063 R)
• M29: 16,876,136 km (0.072 R)
• M30: 17,102,178 km (0.075 R)
• M31: 17,862,584 km (0.063 R)
• M32: 18,169,858 km (0.061 R)
• M33: 18,246,901 km (0.08 R)
• M34: 20,289,211 km (0.074 R)
• M35: 20,609,799 km (0.097 R)
• M36: 21,418,675 km (0.087 R)
• M37: 21,663,268 km (0.056 R)
• M38: 25,788,429 km (0.099 R)
• M39: 26,747,052 km (0.087 R)
• M40: 27,540,070 km (0.081 R)
• M41: 27,717,344 km (0.1 R)
• M42: 27,895,066 km (0.09 R)
• M43: 27,983,927 km (0.031 R)
• M44: 28,878,822 km (0.118 R)
• M45: 29,149,145 km (0.085 R)
• M46: 29,783,141 km (0.085 R)
• M47: 30,788,588 km (0.044 R)
• M48: 33,114,536 km (0.114 R)
• M49: 33,586,517 km (0.038 R)
• M50: 34,728,398 km (0.118 R)
• M51: 36,756,945 km (0.117 R)
• M52: 37,441,654 km (0.077 R)
• M53: 37,638,076 km (0.09 R)
• M54: 38,526,089 km (0.084 R)
• M55: 38,823,639 km (0.083 R)
• M56: 40,423,439 km (0.101 R)
• M57: 40,826,755 km (0.054 R)
• M58: 42,863,380 km (0.081 R)
• M59: 44,516,138 km (0.103 R)
• M60: 44,932,618 km (0.111 R)
• M61: 48,203,875 km (0.114 R)
• M62: 50,571,560 km (0.106 R)
• M63: 50,788,627 km (0.065 R)
• M64: 51,223,807 km (0.094 R)
• M65: 52,426,873 km (0.119 R)
• M66: 52,866,691 km (0.082 R)
• M67: 53,087,048 km (0.105 R)
• M68: 55,979,374 km (0.104 R)
• M69: 57,444,535 km (0.118 R)
• M70: 57,784,571 km (0.046 R)
• M71: 59,265,291 km (0.112 R)
• M72: 59,723,360 km (0.085 R)
• M73: 59,952,843 km (0.095 R)
• M74: 61,336,025 km (0.034 R)
• M75: 64,251,089 km (0.079 R)
• M76: 66,853,643 km (0.066 R)
• M77: 69,369,729 km (0.114 R)
• M78: 69,852,482 km (0.056 R)
• M79: 70,578,779 km (0.07 R)
• M80: 75,359,927 km (0.072 R)
• M81: 76,229,091 km (0.087 R)
• M82: 76,353,556 km (0.105 R)
• M83: 76,727,252 km (0.066 R)
• M84: 78,353,830 km (0.082 R)
• M85: 78,982,440 km (0.064 R)
• M86: 79,360,474 km (0.079 R)
• M87: 79,486,585 km (0.113 R)
• M88: 80,118,187 km (0.076 R)
• M89: 81,768,102 km (0.081 R)
• M90: 84,071,161 km (0.057 R)
• M91: 85,747,704 km (0.054 R)
• M92: 85,877,106 km (0.099 R)

Kuiper Belt

Range: 31.2 - 55.2 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 520 - 14,394 AU

Composition

Type: Cometary Reservoir

System's final boundary, containing trillions of icy planetesimals.

Gravitational Limit