🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.57 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 1.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 434.4

Radius: 9.4

Gravity: 4.92 G

Time & Orbit

Eccentricity (e): 0.229

Orbit Range: 0.88 AU - 1.4 AU

Year: 840 Days

Day: 8.4 Hours

Environment

Temp: -184 °C

Axial Tilt: 7.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (52)

Outer Limit: 21,714,581 km

• M1: 144,063 km (0.114 R)
• M2: 209,138 km (0.099 R)
• M3: 337,642 km (0.119 R)
• M4: 397,033 km (0.096 R)
• M5: 477,516 km (0.115 R)
• M6: 537,804 km (0.113 R)
• M7: 596,447 km (0.092 R)
• M8: 706,252 km (0.089 R)
• M9: 771,626 km (0.057 R)
• M10: 834,008 km (0.038 R)
• M11: 892,800 km (0.063 R)
• M12: 1,095,655 km (0.1 R)
• M13: 1,307,336 km (0.037 R)
• M14: 1,389,315 km (0.117 R)
• M15: 1,599,052 km (0.085 R)
• M16: 1,694,046 km (0.083 R)
• M17: 1,861,446 km (0.12 R)
• M18: 1,990,549 km (0.074 R)
• M19: 2,071,033 km (0.061 R)
• M20: 2,152,713 km (0.12 R)
• M21: 2,212,702 km (0.114 R)
• M22: 2,458,491 km (0.071 R)
• M23: 2,608,688 km (0.118 R)
• M24: 2,689,022 km (0.072 R)
• M25: 2,761,876 km (0.097 R)
• M26: 2,909,978 km (0.099 R)
• M27: 3,196,757 km (0.118 R)
• M28: 3,300,129 km (0.098 R)
• M29: 3,404,698 km (0.08 R)
• M30: 3,519,140 km (0.111 R)
• M31: 3,608,151 km (0.11 R)
• M32: 3,670,982 km (0.074 R)
• M33: 3,907,197 km (0.113 R)
• M34: 3,980,949 km (0.113 R)
• M35: 4,148,499 km (0.108 R)
• M36: 4,442,608 km (0.102 R)
• M37: 4,529,225 km (0.077 R)
• M38: 4,636,038 km (0.115 R)
• M39: 5,232,784 km (0.112 R)
• M40: 5,293,820 km (0.107 R)
• M41: 5,426,812 km (0.111 R)
• M42: 5,498,919 km (0.076 R)
• M43: 5,644,178 km (0.032 R)
• M44: 5,811,578 km (0.101 R)
• M45: 6,291,488 km (0.106 R)
• M46: 6,519,774 km (0.044 R)
• M47: 6,795,184 km (0.085 R)
• M48: 6,861,905 km (0.093 R)
• M49: 7,108,292 km (0.111 R)
• M50: 7,323,414 km (0.071 R)
• M51: 7,391,780 km (0.106 R)
• M52: 7,494,704 km (0.08 R)

Planet 2 - Gas Giant

Semi-Major Axis: 2.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 460.9

Radius: 8.1

Gravity: 7.02 G

Time & Orbit

Eccentricity (e): 0.064

Orbit Range: 2.66 AU - 3.02 AU

Year: 3304 Days

Day: 7.4 Hours

Environment

Temp: -221 °C

Axial Tilt: 26.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 21,714,581 km

• M1: 107,860 km (0.049 R)
• M2: 242,947 km (0.109 R)
• M3: 310,715 km (0.063 R)
• M4: 454,927 km (0.12 R)
• M5: 569,669 km (0.1 R)
• M6: 694,733 km (0.052 R)
• M7: 1,026,092 km (0.108 R)
• M8: 1,135,747 km (0.054 R)
• M9: 1,284,298 km (0.113 R)
• M10: 1,427,164 km (0.099 R)
• M11: 1,625,979 km (0.09 R)
• M12: 1,860,250 km (0.044 R)
• M13: 2,161,540 km (0.075 R)
• M14: 2,218,088 km (0.12 R)
• M15: 2,493,049 km (0.054 R)
• M16: 2,597,169 km (0.082 R)
• M17: 2,871,531 km (0.063 R)
• M18: 3,075,583 km (0.087 R)
• M19: 3,139,311 km (0.1 R)
• M20: 3,464,836 km (0.032 R)
• M21: 3,783,929 km (0.047 R)
• M22: 4,025,230 km (0.115 R)
• M23: 4,307,222 km (0.108 R)
• M24: 4,378,730 km (0.112 R)
• M25: 4,595,647 km (0.11 R)
• M26: 4,668,650 km (0.054 R)
• M27: 4,834,554 km (0.106 R)
• M28: 5,058,802 km (0.116 R)
• M29: 5,172,197 km (0.099 R)
• M30: 5,498,021 km (0.09 R)
• M31: 5,810,830 km (0.109 R)
• M32: 5,909,864 km (0.077 R)
• M33: 5,969,553 km (0.107 R)
• M34: 6,049,289 km (0.119 R)
• M35: 6,149,669 km (0.104 R)
• M36: 6,618,210 km (0.08 R)
• M37: 6,721,582 km (0.115 R)
• M38: 6,846,347 km (0.087 R)
• M39: 7,353,334 km (0.073 R)
• M40: 7,481,838 km (0.096 R)
• M41: 7,568,007 km (0.031 R)
• M42: 7,784,924 km (0.094 R)
• M43: 8,069,908 km (0.119 R)
• M44: 8,224,741 km (0.096 R)
• M45: 8,313,752 km (0.114 R)
• M46: 8,627,608 km (0.077 R)
• M47: 8,990,982 km (0.092 R)
• M48: 9,059,797 km (0.058 R)
• M49: 9,197,726 km (0.115 R)
• M50: 9,756,474 km (0.099 R)
• M51: 10,135,106 km (0.105 R)
• M52: 10,230,550 km (0.04 R)
• M53: 10,833,579 km (0.109 R)
• M54: 11,004,569 km (0.102 R)
• M55: 11,151,773 km (0.117 R)
• M56: 11,622,408 km (0.105 R)
• M57: 11,697,207 km (0.092 R)
• M58: 11,797,288 km (0.061 R)
• M59: 11,897,818 km (0.076 R)
• M60: 12,353,044 km (0.101 R)
• M61: 12,762,643 km (0.108 R)
• M62: 12,839,836 km (0.078 R)
• M63: 13,072,610 km (0.104 R)
• M64: 13,832,268 km (0.066 R)
• M65: 14,391,315 km (0.104 R)
• M66: 14,471,649 km (0.108 R)
• M67: 14,579,210 km (0.117 R)
• M68: 15,011,997 km (0.101 R)
• M69: 15,613,829 km (0.102 R)
• M70: 15,889,987 km (0.097 R)
• M71: 16,475,214 km (0.098 R)
• M72: 16,841,130 km (0.057 R)
• M73: 17,523,595 km (0.099 R)
• M74: 17,954,736 km (0.069 R)
• M75: 18,244,059 km (0.056 R)
• M76: 18,418,490 km (0.061 R)
• M77: 18,476,683 km (0.089 R)
• M78: 19,091,979 km (0.093 R)

Planet 3 - Gas Giant

Semi-Major Axis: 4.58 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 545.2

Radius: 13.1

Gravity: 3.18 G

Time & Orbit

Eccentricity (e): 0.018

Orbit Range: 4.5 AU - 4.66 AU

Year: 6766 Days

Day: 10.8 Hours

Environment

Temp: -219 °C

Axial Tilt: 26.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 21,714,581 km

• M1: 187,297 km (0.08 R)
• M2: 297,550 km (0.061 R)
• M3: 415,284 km (0.084 R)
• M4: 499,058 km (0.041 R)
• M5: 688,898 km (0.09 R)
• M6: 1,144,873 km (0.104 R)
• M7: 1,491,640 km (0.12 R)
• M8: 1,614,759 km (0.087 R)
• M9: 1,704,967 km (0.093 R)
• M10: 1,966,913 km (0.091 R)
• M11: 2,221,977 km (0.108 R)
• M12: 3,488,622 km (0.093 R)
• M13: 3,654,826 km (0.114 R)
• M14: 3,896,576 km (0.087 R)
• M15: 3,994,862 km (0.033 R)
• M16: 4,550,169 km (0.112 R)
• M17: 5,076,454 km (0.104 R)
• M18: 5,428,907 km (0.112 R)
• M19: 5,539,011 km (0.096 R)
• M20: 5,705,513 km (0.059 R)
• M21: 5,901,935 km (0.103 R)
• M22: 6,446,471 km (0.103 R)
• M23: 7,067,153 km (0.12 R)
• M24: 7,187,579 km (0.113 R)
• M25: 7,461,044 km (0.116 R)
• M26: 7,893,382 km (0.105 R)
• M27: 8,207,089 km (0.083 R)
• M28: 8,302,083 km (0.101 R)
• M29: 9,074,906 km (0.106 R)
• M30: 9,503,205 km (0.107 R)
• M31: 10,277,075 km (0.119 R)
• M32: 10,585,396 km (0.088 R)
• M33: 10,723,475 km (0.088 R)
• M34: 10,827,445 km (0.072 R)
• M35: 11,176,307 km (0.109 R)
• M36: 11,281,774 km (0.114 R)
• M37: 11,387,390 km (0.064 R)
• M38: 11,528,910 km (0.115 R)
• M39: 11,921,006 km (0.085 R)
• M40: 12,426,497 km (0.114 R)
• M41: 12,828,466 km (0.097 R)
• M42: 13,272,024 km (0.103 R)
• M43: 13,833,465 km (0.1 R)
• M44: 13,946,710 km (0.076 R)
• M45: 14,326,539 km (0.107 R)
• M46: 15,525,267 km (0.1 R)
• M47: 15,642,851 km (0.104 R)
• M48: 17,607,520 km (0.095 R)
• M49: 18,307,189 km (0.119 R)
• M50: 19,057,871 km (0.066 R)
• M51: 19,183,982 km (0.103 R)
• M52: 19,563,961 km (0.117 R)
• M53: 19,861,212 km (0.029 R)
• M54: 20,417,267 km (0.04 R)
• M55: 21,501,104 km (0.075 R)
• M56: 21,632,301 km (0.088 R)
• M57: 23,139,200 km (0.07 R)
• M58: 23,453,655 km (0.09 R)
• M59: 23,543,713 km (0.097 R)
• M60: 23,859,963 km (0.079 R)
• M61: 24,177,709 km (0.085 R)
• M62: 24,771,313 km (0.082 R)
• M63: 24,955,019 km (0.07 R)
• M64: 25,647,657 km (0.085 R)
• M65: 25,740,558 km (0.073 R)
• M66: 26,159,731 km (0.083 R)
• M67: 26,581,148 km (0.072 R)
• M68: 27,811,291 km (0.11 R)
• M69: 28,673,723 km (0.104 R)
• M70: 29,011,515 km (0.082 R)
• M71: 29,205,095 km (0.088 R)
• M72: 29,593,600 km (0.082 R)
• M73: 29,983,901 km (0.113 R)
• M74: 30,326,780 km (0.114 R)
• M75: 31,611,526 km (0.059 R)
• M76: 31,711,158 km (0.116 R)
• M77: 32,461,242 km (0.107 R)
• M78: 32,712,716 km (0.114 R)
• M79: 32,964,639 km (0.085 R)
• M80: 33,470,579 km (0.106 R)

Planet 4 - Gas Giant

Semi-Major Axis: 5.28 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 996.2

Radius: 11.6

Gravity: 7.4 G

Time & Orbit

Eccentricity (e): 0.017

Orbit Range: 5.19 AU - 5.37 AU

Year: 8375 Days

Day: 10.6 Hours

Environment

Temp: -215 °C

Axial Tilt: 0.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 21,714,581 km

• M1: 152,141 km (0.067 R)
• M2: 250,876 km (0.03 R)
• M3: 406,757 km (0.049 R)
• M4: 851,212 km (0.047 R)
• M5: 1,192,145 km (0.073 R)
• M6: 1,443,171 km (0.116 R)
• M7: 1,804,450 km (0.057 R)
• M8: 3,051,497 km (0.094 R)
• M9: 3,605,757 km (0.08 R)
• M10: 4,191,433 km (0.057 R)
• M11: 5,040,700 km (0.104 R)
• M12: 5,694,593 km (0.11 R)
• M13: 6,121,395 km (0.109 R)
• M14: 6,375,263 km (0.104 R)
• M15: 6,521,869 km (0.097 R)
• M16: 6,595,471 km (0.096 R)
• M17: 7,043,816 km (0.083 R)
• M18: 7,969,827 km (0.092 R)
• M19: 8,327,066 km (0.086 R)
• M20: 8,608,460 km (0.112 R)
• M21: 9,098,243 km (0.064 R)
• M22: 9,934,795 km (0.117 R)
• M23: 10,062,402 km (0.051 R)
• M24: 10,319,261 km (0.06 R)
• M25: 10,708,664 km (0.105 R)
• M26: 11,146,986 km (0.115 R)
• M27: 11,457,402 km (0.08 R)
• M28: 12,313,999 km (0.114 R)
• M29: 13,425,661 km (0.12 R)
• M30: 13,614,005 km (0.112 R)
• M31: 15,152,469 km (0.036 R)
• M32: 15,496,395 km (0.042 R)
• M33: 15,644,497 km (0.106 R)
• M34: 16,846,815 km (0.042 R)
• M35: 16,948,392 km (0.092 R)
• M36: 17,254,170 km (0.034 R)
• M37: 17,871,410 km (0.083 R)
• M38: 18,130,664 km (0.083 R)
• M39: 19,712,511 km (0.12 R)
• M40: 20,411,582 km (0.098 R)
• M41: 21,173,634 km (0.098 R)
• M42: 21,723,705 km (0.1 R)
• M43: 22,781,661 km (0.12 R)
• M44: 22,894,009 km (0.057 R)
• M45: 23,006,507 km (0.106 R)
• M46: 23,458,442 km (0.104 R)
• M47: 23,685,532 km (0.12 R)
• M48: 24,601,220 km (0.055 R)
• M49: 25,005,434 km (0.113 R)
• M50: 25,937,728 km (0.1 R)
• M51: 28,620,167 km (0.074 R)
• M52: 28,923,552 km (0.042 R)
• M53: 29,594,947 km (0.105 R)
• M54: 30,766,747 km (0.112 R)
• M55: 31,015,379 km (0.082 R)
• M56: 32,142,449 km (0.113 R)
• M57: 32,394,671 km (0.07 R)
• M58: 32,964,788 km (0.099 R)
• M59: 34,243,401 km (0.064 R)
• M60: 34,436,682 km (0.115 R)
• M61: 35,213,095 km (0.103 R)
• M62: 37,444,048 km (0.101 R)
• M63: 37,709,584 km (0.07 R)
• M64: 38,242,452 km (0.058 R)
• M65: 38,777,713 km (0.099 R)
• M66: 39,113,560 km (0.053 R)
• M67: 39,720,479 km (0.076 R)
• M68: 40,262,621 km (0.106 R)
• M69: 40,875,524 km (0.116 R)
• M70: 41,422,902 km (0.057 R)
• M71: 42,663,218 km (0.11 R)
• M72: 42,871,159 km (0.092 R)
• M73: 43,496,927 km (0.086 R)
• M74: 45,675,371 km (0.116 R)
• M75: 46,385,662 km (0.088 R)
• M76: 46,599,587 km (0.084 R)
• M77: 47,028,185 km (0.069 R)
• M78: 47,601,594 km (0.087 R)

Planet 5 - Ice Giant

Semi-Major Axis: 5.92 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 682

Radius: 8

Gravity: 10.66 G

Time & Orbit

Eccentricity (e): 0.184

Orbit Range: 4.83 AU - 7.01 AU

Year: 9942 Days

Day: 15.8 Hours

Environment

Temp: -230 °C

Axial Tilt: 20.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 21,714,581 km

• M1: 127,308 km (0.072 R)
• M2: 195,824 km (0.068 R)
• M3: 438,172 km (0.077 R)
• M4: 798,703 km (0.111 R)
• M5: 851,810 km (0.118 R)
• M6: 1,076,805 km (0.09 R)
• M7: 1,237,174 km (0.085 R)
• M8: 1,384,079 km (0.073 R)
• M9: 1,470,697 km (0.08 R)
• M10: 2,303,957 km (0.075 R)
• M11: 2,591,783 km (0.076 R)
• M12: 2,836,076 km (0.088 R)
• M13: 3,259,438 km (0.088 R)
• M14: 3,582,719 km (0.113 R)
• M15: 3,672,628 km (0.07 R)
• M16: 4,451,285 km (0.113 R)
• M17: 4,809,721 km (0.111 R)
• M18: 5,211,391 km (0.089 R)
• M19: 5,450,748 km (0.069 R)
• M20: 5,623,833 km (0.097 R)
• M21: 6,516,782 km (0.068 R)
• M22: 9,824,990 km (0.108 R)
• M23: 9,993,736 km (0.086 R)
• M24: 10,163,231 km (0.06 R)
• M25: 10,505,361 km (0.083 R)
• M26: 11,332,936 km (0.104 R)
• M27: 11,598,622 km (0.109 R)
• M28: 12,001,040 km (0.115 R)
• M29: 13,986,204 km (0.083 R)
• M30: 14,081,049 km (0.111 R)
• M31: 14,943,630 km (0.096 R)
• M32: 15,137,659 km (0.08 R)
• M33: 15,381,503 km (0.045 R)
• M34: 16,319,482 km (0.097 R)
• M35: 16,469,230 km (0.113 R)
• M36: 16,971,878 km (0.104 R)
• M37: 17,632,802 km (0.117 R)
• M38: 17,735,276 km (0.075 R)
• M39: 17,940,674 km (0.096 R)
• M40: 18,146,970 km (0.067 R)
• M41: 19,137,457 km (0.096 R)
• M42: 19,242,774 km (0.089 R)
• M43: 19,401,049 km (0.076 R)
• M44: 20,038,485 km (0.053 R)
• M45: 20,574,943 km (0.099 R)
• M46: 21,443,060 km (0.078 R)
• M47: 22,323,144 km (0.088 R)
• M48: 22,544,998 km (0.071 R)
• M49: 22,711,799 km (0.094 R)
• M50: 23,834,830 km (0.097 R)
• M51: 24,004,923 km (0.044 R)
• M52: 24,403,153 km (0.079 R)
• M53: 25,148,599 km (0.08 R)
• M54: 25,611,006 km (0.112 R)
• M55: 25,901,375 km (0.076 R)
• M56: 26,076,255 km (0.1 R)
• M57: 27,015,131 km (0.108 R)
• M58: 27,192,405 km (0.046 R)
• M59: 28,865,508 km (0.109 R)
• M60: 29,471,080 km (0.039 R)
• M61: 29,897,434 km (0.096 R)
• M62: 30,080,841 km (0.118 R)
• M63: 31,188,912 km (0.07 R)
• M64: 31,561,261 km (0.074 R)
• M65: 31,623,494 km (0.108 R)
• M66: 33,444,848 km (0.108 R)
• M67: 33,698,716 km (0.046 R)
• M68: 34,400,330 km (0.072 R)
• M69: 34,656,591 km (0.11 R)
• M70: 35,106,581 km (0.101 R)
• M71: 35,171,058 km (0.044 R)
• M72: 36,403,146 km (0.065 R)
• M73: 36,598,969 km (0.12 R)
• M74: 37,451,528 km (0.078 R)
• M75: 37,979,459 km (0.03 R)
• M76: 38,178,125 km (0.081 R)
• M77: 38,244,396 km (0.074 R)
• M78: 38,709,347 km (0.039 R)
• M79: 40,520,678 km (0.08 R)
• M80: 41,811,707 km (0.071 R)
• M81: 42,290,720 km (0.089 R)
• M82: 42,359,385 km (0.115 R)
• M83: 43,254,280 km (0.084 R)
• M84: 43,808,240 km (0.103 R)
• M85: 43,947,067 km (0.097 R)
• M86: 44,922,894 km (0.078 R)
• M87: 44,992,906 km (0.086 R)
• M88: 45,554,048 km (0.1 R)
• M89: 46,117,583 km (0.077 R)
• M90: 46,258,803 km (0.087 R)
• M91: 47,393,802 km (0.065 R)
• M92: 47,465,011 km (0.114 R)

Planet 6 - Ice Giant

Semi-Major Axis: 5.93 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 64.1

Radius: 6.7

Gravity: 1.43 G

Time & Orbit

Eccentricity (e): 0.137

Orbit Range: 5.12 AU - 6.74 AU

Year: 9968 Days

Day: 23.7 Hours

Environment

Temp: -232 °C

Axial Tilt: 2.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (54)

Outer Limit: 21,714,581 km

• M1: 115,340 km (0.112 R)
• M2: 237,262 km (0.077 R)
• M3: 696,827 km (0.093 R)
• M4: 840,441 km (0.072 R)
• M5: 1,467,705 km (0.075 R)
• M6: 1,888,972 km (0.107 R)
• M7: 1,945,969 km (0.106 R)
• M8: 2,422,738 km (0.102 R)
• M9: 2,918,056 km (0.097 R)
• M10: 3,637,771 km (0.106 R)
• M11: 3,798,888 km (0.053 R)
• M12: 4,240,052 km (0.051 R)
• M13: 4,390,698 km (0.119 R)
• M14: 4,447,694 km (0.102 R)
• M15: 4,931,943 km (0.093 R)
• M16: 5,824,593 km (0.07 R)
• M17: 5,866,331 km (0.115 R)
• M18: 6,634,965 km (0.113 R)
• M19: 6,700,339 km (0.117 R)
• M20: 6,898,107 km (0.085 R)
• M21: 7,075,530 km (0.068 R)
• M22: 7,209,570 km (0.112 R)
• M23: 7,548,260 km (0.091 R)
• M24: 7,685,291 km (0.119 R)
• M25: 8,124,511 km (0.114 R)
• M26: 8,358,931 km (0.091 R)
• M27: 8,762,546 km (0.094 R)
• M28: 8,906,459 km (0.11 R)
• M29: 8,978,864 km (0.077 R)
• M30: 9,564,091 km (0.049 R)
• M31: 9,687,659 km (0.118 R)
• M32: 9,762,009 km (0.052 R)
• M33: 10,439,687 km (0.074 R)
• M34: 10,515,982 km (0.095 R)
• M35: 10,566,846 km (0.109 R)
• M36: 11,132,625 km (0.118 R)
• M37: 11,787,265 km (0.107 R)
• M38: 11,840,223 km (0.099 R)
• M39: 12,132,687 km (0.103 R)
• M40: 12,293,205 km (0.088 R)
• M41: 12,454,472 km (0.105 R)
• M42: 12,697,718 km (0.11 R)
• M43: 12,806,326 km (0.041 R)
• M44: 13,797,412 km (0.098 R)
• M45: 14,358,703 km (0.1 R)
• M46: 14,443,525 km (0.119 R)
• M47: 14,670,465 km (0.07 R)
• M48: 15,387,637 km (0.103 R)
• M49: 16,528,919 km (0.113 R)
• M50: 17,154,687 km (0.041 R)
• M51: 17,636,691 km (0.104 R)
• M52: 17,788,234 km (0.056 R)
• M53: 18,521,712 km (0.119 R)
• M54: 19,860,165 km (0.074 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 545 - 16,088 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit