🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.52 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.22

Radius: 1.08

Gravity: 1.05 G

Time & Orbit

Eccentricity (e): 0.153

Orbit Range: 0.44 AU - 0.6 AU

Year: 246 Days

Day: 22.8 Hours

Environment

Temp: -119 °C

Axial Tilt: 6.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.58 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.3

Radius: 0.62

Gravity: 0.78 G

Time & Orbit

Eccentricity (e): 0.104

Orbit Range: 0.52 AU - 0.64 AU

Year: 290 Days

Day: 15.4 Hours

Environment

Temp: -126 °C

Axial Tilt: 27.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 0.58 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.69

Radius: 1.86

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.245

Orbit Range: 0.44 AU - 0.72 AU

Year: 290 Days

Day: 14.9 Hours

Environment

Temp: -116 °C

Axial Tilt: 14.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 0.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 18.9

Radius: 13.1

Gravity: 0.11 G

Time & Orbit

Eccentricity (e): 0.19

Orbit Range: 0.56 AU - 0.82 AU

Year: 376 Days

Day: 11 Hours

Environment

Temp: -127 °C

Axial Tilt: 46.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 49,982,513 km

• M1: 164,109 km (0.094 R)
• M2: 290,818 km (0.11 R)
• M3: 404,513 km (0.077 R)
• M4: 520,601 km (0.113 R)
• M5: 613,351 km (0.044 R)
• M6: 700,417 km (0.112 R)
• M7: 785,688 km (0.032 R)
• M8: 922,420 km (0.109 R)
• M9: 1,015,919 km (0.085 R)
• M10: 1,099,694 km (0.096 R)
• M11: 1,184,067 km (0.078 R)
• M12: 1,329,476 km (0.084 R)
• M13: 1,420,133 km (0.115 R)
• M14: 1,592,769 km (0.09 R)

Planet 5 - Gas Giant

Semi-Major Axis: 0.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 967

Radius: 8

Gravity: 15.11 G

Time & Orbit

Eccentricity (e): 0.075

Orbit Range: 0.9 AU - 1.04 AU

Year: 627 Days

Day: 5.8 Hours

Environment

Temp: -149 °C

Axial Tilt: 10.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 49,982,513 km

• M1: 99,782 km (0.11 R)
• M2: 149,747 km (0.05 R)
• M3: 219,610 km (0.074 R)
• M4: 337,343 km (0.118 R)
• M5: 405,410 km (0.106 R)
• M6: 520,002 km (0.049 R)
• M7: 586,573 km (0.11 R)
• M8: 734,376 km (0.118 R)
• M9: 810,372 km (0.033 R)
• M10: 877,691 km (0.09 R)
• M11: 941,120 km (0.067 R)
• M12: 1,036,414 km (0.069 R)
• M13: 1,198,279 km (0.092 R)
• M14: 1,288,935 km (0.058 R)
• M15: 1,355,058 km (0.103 R)
• M16: 1,484,011 km (0.05 R)
• M17: 1,567,636 km (0.088 R)
• M18: 1,710,652 km (0.092 R)
• M19: 1,835,566 km (0.102 R)
• M20: 1,933,253 km (0.098 R)
• M21: 2,032,586 km (0.05 R)
• M22: 2,173,059 km (0.081 R)
• M23: 2,252,495 km (0.1 R)
• M24: 2,554,832 km (0.043 R)
• M25: 2,605,247 km (0.099 R)
• M26: 2,672,716 km (0.097 R)
• M27: 2,844,304 km (0.066 R)
• M28: 2,896,364 km (0.1 R)
• M29: 2,957,700 km (0.079 R)
• M30: 3,019,483 km (0.079 R)
• M31: 3,362,063 km (0.059 R)
• M32: 3,679,210 km (0.096 R)
• M33: 4,005,932 km (0.069 R)
• M34: 4,074,298 km (0.112 R)
• M35: 4,212,377 km (0.106 R)
• M36: 4,301,986 km (0.064 R)
• M37: 4,533,863 km (0.061 R)
• M38: 4,584,876 km (0.054 R)
• M39: 4,852,805 km (0.089 R)
• M40: 5,168,606 km (0.097 R)
• M41: 5,221,863 km (0.069 R)
• M42: 5,404,223 km (0.064 R)
• M43: 6,087,586 km (0.085 R)
• M44: 6,256,931 km (0.11 R)
• M45: 6,427,921 km (0.112 R)
• M46: 6,612,076 km (0.047 R)
• M47: 6,832,883 km (0.093 R)
• M48: 6,938,349 km (0.049 R)
• M49: 7,353,783 km (0.043 R)
• M50: 7,413,771 km (0.08 R)
• M51: 7,558,432 km (0.105 R)
• M52: 7,619,020 km (0.118 R)
• M53: 7,704,141 km (0.07 R)
• M54: 7,875,131 km (0.033 R)
• M55: 8,158,918 km (0.061 R)
• M56: 8,221,151 km (0.117 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 821

Radius: 13.9

Gravity: 4.25 G

Time & Orbit

Eccentricity (e): 0.131

Orbit Range: 1 AU - 1.3 AU

Year: 809 Days

Day: 11.8 Hours

Environment

Temp: -170 °C

Axial Tilt: 17.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 49,982,513 km

• M1: 183,706 km (0.036 R)
• M2: 290,220 km (0.108 R)
• M3: 404,662 km (0.115 R)
• M4: 523,293 km (0.091 R)
• M5: 631,602 km (0.118 R)
• M6: 737,966 km (0.07 R)
• M7: 839,842 km (0.067 R)
• M8: 1,034,469 km (0.045 R)
• M9: 1,131,259 km (0.106 R)
• M10: 1,224,608 km (0.12 R)
• M11: 1,348,774 km (0.109 R)
• M12: 1,492,089 km (0.088 R)
• M13: 1,603,091 km (0.104 R)
• M14: 1,865,635 km (0.093 R)
• M15: 2,010,446 km (0.067 R)
• M16: 2,260,424 km (0.103 R)
• M17: 2,372,024 km (0.086 R)
• M18: 2,520,874 km (0.093 R)
• M19: 2,627,836 km (0.101 R)
• M20: 2,718,193 km (0.119 R)
• M21: 2,948,724 km (0.099 R)
• M22: 3,052,395 km (0.082 R)
• M23: 3,234,156 km (0.057 R)
• M24: 3,638,968 km (0.088 R)
• M25: 3,873,238 km (0.069 R)
• M26: 4,335,496 km (0.085 R)
• M27: 4,443,057 km (0.111 R)
• M28: 4,617,039 km (0.12 R)
• M29: 4,771,125 km (0.1 R)
• M30: 4,859,986 km (0.068 R)
• M31: 4,994,325 km (0.059 R)
• M32: 5,118,641 km (0.075 R)
• M33: 5,370,264 km (0.105 R)
• M34: 5,474,384 km (0.077 R)
• M35: 5,579,253 km (0.092 R)
• M36: 5,673,050 km (0.056 R)
• M37: 5,945,468 km (0.092 R)
• M38: 6,270,993 km (0.111 R)
• M39: 6,614,619 km (0.104 R)
• M40: 6,776,335 km (0.114 R)
• M41: 6,952,112 km (0.098 R)
• M42: 7,078,373 km (0.079 R)
• M43: 7,167,384 km (0.079 R)
• M44: 7,423,645 km (0.057 R)
• M45: 7,514,002 km (0.102 R)
• M46: 7,604,658 km (0.086 R)
• M47: 7,708,928 km (0.104 R)
• M48: 7,813,646 km (0.096 R)
• M49: 7,905,499 km (0.106 R)
• M50: 8,077,387 km (0.099 R)
• M51: 8,330,657 km (0.102 R)
• M52: 8,451,532 km (0.035 R)
• M53: 8,695,227 km (0.101 R)
• M54: 8,858,887 km (0.114 R)
• M55: 9,009,831 km (0.1 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 871.6

Radius: 14.1

Gravity: 4.38 G

Time & Orbit

Eccentricity (e): 0.049

Orbit Range: 1.99 AU - 2.19 AU

Year: 1982 Days

Day: 5.2 Hours

Environment

Temp: -190 °C

Axial Tilt: 4.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (67)

Outer Limit: 49,982,513 km

• M1: 192,832 km (0.087 R)
• M2: 315,203 km (0.061 R)
• M3: 425,905 km (0.077 R)
• M4: 770,130 km (0.087 R)
• M5: 920,326 km (0.097 R)
• M6: 1,262,905 km (0.111 R)
• M7: 1,433,297 km (0.069 R)
• M8: 1,544,000 km (0.114 R)
• M9: 1,646,175 km (0.113 R)
• M10: 1,893,909 km (0.109 R)
• M11: 2,028,697 km (0.117 R)
• M12: 2,256,534 km (0.1 R)
• M13: 2,347,490 km (0.053 R)
• M14: 2,439,792 km (0.046 R)
• M15: 2,560,218 km (0.108 R)
• M16: 2,668,976 km (0.099 R)
• M17: 2,849,241 km (0.098 R)
• M18: 2,947,976 km (0.11 R)
• M19: 3,091,141 km (0.058 R)
• M20: 3,339,922 km (0.092 R)
• M21: 3,580,176 km (0.114 R)
• M22: 3,733,364 km (0.057 R)
• M23: 3,873,089 km (0.1 R)
• M24: 4,482,401 km (0.102 R)
• M25: 4,614,646 km (0.093 R)
• M26: 4,748,087 km (0.059 R)
• M27: 4,882,874 km (0.094 R)
• M28: 5,036,212 km (0.092 R)
• M29: 5,312,520 km (0.073 R)
• M30: 5,826,388 km (0.103 R)
• M31: 6,337,714 km (0.093 R)
• M32: 6,430,464 km (0.105 R)
• M33: 6,939,845 km (0.113 R)
• M34: 7,267,315 km (0.075 R)
• M35: 7,560,377 km (0.05 R)
• M36: 7,659,112 km (0.102 R)
• M37: 7,837,582 km (0.108 R)
• M38: 7,937,364 km (0.081 R)
• M39: 8,118,228 km (0.102 R)
• M40: 8,219,206 km (0.075 R)
• M41: 8,361,324 km (0.089 R)
• M42: 8,751,176 km (0.085 R)
• M43: 9,379,039 km (0.075 R)
• M44: 9,485,253 km (0.047 R)
• M45: 9,634,402 km (0.095 R)
• M46: 9,892,010 km (0.079 R)
• M47: 10,348,283 km (0.074 R)
• M48: 10,523,911 km (0.104 R)
• M49: 10,833,579 km (0.1 R)
• M50: 11,034,339 km (0.07 R)
• M51: 11,417,010 km (0.079 R)
• M52: 11,849,797 km (0.075 R)
• M53: 11,941,500 km (0.106 R)
• M54: 12,357,532 km (0.095 R)
• M55: 12,614,242 km (0.078 R)
• M56: 12,943,357 km (0.106 R)
• M57: 13,061,689 km (0.072 R)
• M58: 13,299,251 km (0.099 R)
• M59: 13,466,501 km (0.07 R)
• M60: 13,586,329 km (0.063 R)
• M61: 13,923,822 km (0.105 R)
• M62: 14,533,284 km (0.084 R)
• M63: 14,656,253 km (0.099 R)
• M64: 14,804,355 km (0.078 R)
• M65: 15,301,319 km (0.065 R)
• M66: 16,031,656 km (0.08 R)
• M67: 17,265,539 km (0.116 R)

Planet 8 - Gas Giant

Semi-Major Axis: 2.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 52

Radius: 14.7

Gravity: 0.24 G

Time & Orbit

Eccentricity (e): 0.08

Orbit Range: 1.97 AU - 2.31 AU

Year: 2054 Days

Day: 6.2 Hours

Environment

Temp: -187 °C

Axial Tilt: 8.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (40)

Outer Limit: 49,982,513 km

• M1: 216,767 km (0.116 R)
• M2: 353,350 km (0.117 R)
• M3: 468,840 km (0.088 R)
• M4: 673,789 km (0.097 R)
• M5: 770,878 km (0.082 R)
• M6: 902,674 km (0.115 R)
• M7: 1,095,206 km (0.028 R)
• M8: 1,196,933 km (0.069 R)
• M9: 1,469,649 km (0.111 R)
• M10: 1,583,493 km (0.08 R)
• M11: 1,775,876 km (0.032 R)
• M12: 1,904,231 km (0.079 R)
• M13: 2,029,295 km (0.119 R)
• M14: 2,150,469 km (0.117 R)
• M15: 2,274,037 km (0.047 R)
• M16: 2,492,899 km (0.095 R)
• M17: 2,594,027 km (0.109 R)
• M18: 2,860,760 km (0.062 R)
• M19: 3,005,122 km (0.109 R)
• M20: 3,121,060 km (0.089 R)
• M21: 3,269,910 km (0.064 R)
• M22: 3,437,310 km (0.043 R)
• M23: 3,632,236 km (0.065 R)
• M24: 3,889,545 km (0.041 R)
• M25: 4,144,310 km (0.08 R)
• M26: 4,343,425 km (0.09 R)
• M27: 4,475,071 km (0.09 R)
• M28: 4,652,643 km (0.084 R)
• M29: 4,814,508 km (0.054 R)
• M30: 5,079,446 km (0.03 R)
• M31: 5,246,248 km (0.109 R)
• M32: 5,424,269 km (0.089 R)
• M33: 5,537,814 km (0.083 R)
• M34: 5,728,850 km (0.074 R)
• M35: 5,883,235 km (0.035 R)
• M36: 5,980,474 km (0.112 R)
• M37: 6,225,964 km (0.113 R)
• M38: 6,504,815 km (0.076 R)
• M39: 6,625,540 km (0.093 R)
• M40: 6,961,687 km (0.09 R)

Planet 9 - Gas Giant

Semi-Major Axis: 4.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 467.4

Radius: 14.6

Gravity: 2.19 G

Time & Orbit

Eccentricity (e): 0.011

Orbit Range: 3.98 AU - 4.06 AU

Year: 5287 Days

Day: 9.7 Hours

Environment

Temp: -208 °C

Axial Tilt: 43.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 49,982,513 km

• M1: 197,619 km (0.042 R)
• M2: 289,921 km (0.096 R)
• M3: 384,616 km (0.074 R)
• M4: 487,988 km (0.106 R)
• M5: 604,675 km (0.09 R)
• M6: 1,278,613 km (0.092 R)
• M7: 1,903,035 km (0.105 R)
• M8: 2,433,808 km (0.048 R)
• M9: 2,541,967 km (0.113 R)
• M10: 3,126,595 km (0.109 R)
• M11: 3,364,307 km (0.106 R)
• M12: 3,649,141 km (0.068 R)
• M13: 3,773,756 km (0.032 R)
• M14: 3,984,689 km (0.108 R)
• M15: 4,286,428 km (0.116 R)
• M16: 4,484,495 km (0.048 R)
• M17: 5,120,286 km (0.114 R)
• M18: 5,377,894 km (0.109 R)
• M19: 5,930,508 km (0.067 R)
• M20: 6,350,878 km (0.096 R)
• M21: 6,526,806 km (0.097 R)
• M22: 6,678,797 km (0.07 R)
• M23: 6,857,716 km (0.085 R)
• M24: 7,194,311 km (0.092 R)
• M25: 7,351,539 km (0.103 R)
• M26: 7,562,920 km (0.109 R)
• M27: 8,209,183 km (0.028 R)
• M28: 8,789,473 km (0.094 R)
• M29: 9,843,839 km (0.061 R)
• M30: 10,253,438 km (0.1 R)
• M31: 10,728,262 km (0.108 R)
• M32: 11,028,654 km (0.106 R)
• M33: 11,179,898 km (0.081 R)
• M34: 12,227,083 km (0.103 R)
• M35: 12,383,712 km (0.11 R)
• M36: 12,667,349 km (0.091 R)
• M37: 13,208,894 km (0.043 R)
• M38: 13,466,501 km (0.083 R)
• M39: 13,628,366 km (0.107 R)
• M40: 14,315,020 km (0.108 R)
• M41: 15,013,044 km (0.118 R)
• M42: 15,180,893 km (0.112 R)
• M43: 15,484,576 km (0.094 R)
• M44: 15,756,246 km (0.111 R)
• M45: 15,892,679 km (0.067 R)
• M46: 16,201,001 km (0.1 R)
• M47: 16,649,944 km (0.074 R)
• M48: 17,560,247 km (0.049 R)
• M49: 18,164,173 km (0.07 R)
• M50: 18,450,653 km (0.105 R)
• M51: 18,558,513 km (0.095 R)
• M52: 19,942,892 km (0.102 R)
• M53: 20,090,545 km (0.052 R)
• M54: 20,275,598 km (0.1 R)
• M55: 20,498,499 km (0.104 R)
• M56: 21,096,741 km (0.084 R)
• M57: 21,587,122 km (0.108 R)
• M58: 21,852,659 km (0.103 R)
• M59: 22,081,095 km (0.107 R)
• M60: 22,425,469 km (0.113 R)
• M61: 23,352,228 km (0.088 R)
• M62: 23,585,899 km (0.104 R)
• M63: 24,055,487 km (0.083 R)
• M64: 24,726,134 km (0.099 R)
• M65: 25,362,973 km (0.103 R)
• M66: 25,763,745 km (0.116 R)
• M67: 26,085,830 km (0.108 R)
• M68: 26,774,728 km (0.113 R)
• M69: 27,141,990 km (0.119 R)
• M70: 27,264,661 km (0.08 R)

Planet 10 - Ice Giant

Semi-Major Axis: 6.24 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 742.8

Radius: 6.5

Gravity: 17.58 G

Time & Orbit

Eccentricity (e): 0.226

Orbit Range: 4.83 AU - 7.65 AU

Year: 10226 Days

Day: 22 Hours

Environment

Temp: -222 °C

Axial Tilt: 14.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 49,982,513 km

• M1: 172,486 km (0.12 R)
• M2: 393,742 km (0.115 R)
• M3: 573,109 km (0.114 R)
• M4: 742,155 km (0.059 R)
• M5: 1,147,116 km (0.053 R)
• M6: 1,231,190 km (0.103 R)
• M7: 1,274,125 km (0.04 R)
• M8: 1,519,017 km (0.062 R)
• M9: 1,635,254 km (0.11 R)
• M10: 1,951,205 km (0.055 R)
• M11: 2,077,914 km (0.079 R)
• M12: 2,339,412 km (0.053 R)
• M13: 2,446,823 km (0.077 R)
• M14: 2,501,276 km (0.107 R)
• M15: 2,694,856 km (0.06 R)
• M16: 3,155,468 km (0.11 R)
• M17: 3,304,467 km (0.064 R)
• M18: 3,891,639 km (0.114 R)
• M19: 4,051,559 km (0.118 R)
• M20: 4,377,832 km (0.118 R)
• M21: 4,712,632 km (0.118 R)
• M22: 5,090,367 km (0.114 R)
• M23: 5,300,552 km (0.117 R)
• M24: 5,549,333 km (0.12 R)
• M25: 5,657,193 km (0.067 R)
• M26: 6,021,613 km (0.095 R)
• M27: 6,431,212 km (0.079 R)
• M28: 7,120,709 km (0.058 R)
• M29: 7,395,371 km (0.056 R)
• M30: 8,987,242 km (0.058 R)
• M31: 9,411,950 km (0.11 R)
• M32: 9,454,885 km (0.117 R)
• M33: 9,973,989 km (0.048 R)
• M34: 10,859,609 km (0.053 R)
• M35: 10,949,517 km (0.091 R)
• M36: 12,094,689 km (0.12 R)
• M37: 12,234,563 km (0.096 R)
• M38: 12,516,255 km (0.073 R)
• M39: 12,799,893 km (0.078 R)
• M40: 13,133,496 km (0.093 R)
• M41: 13,181,368 km (0.106 R)
• M42: 15,700,297 km (0.068 R)
• M43: 15,802,023 km (0.117 R)
• M44: 16,006,224 km (0.118 R)
• M45: 16,417,170 km (0.11 R)
• M46: 17,197,173 km (0.12 R)
• M47: 18,684,924 km (0.071 R)
• M48: 19,608,242 km (0.06 R)
• M49: 20,047,910 km (0.103 R)
• M50: 20,213,664 km (0.084 R)
• M51: 20,269,016 km (0.094 R)
• M52: 20,713,471 km (0.086 R)
• M53: 21,049,019 km (0.053 R)
• M54: 23,099,258 km (0.091 R)
• M55: 23,505,416 km (0.104 R)
• M56: 24,148,088 km (0.112 R)
• M57: 24,560,230 km (0.119 R)
• M58: 25,570,614 km (0.052 R)
• M59: 26,473,438 km (0.114 R)
• M60: 27,325,397 km (0.044 R)
• M61: 27,447,918 km (0.104 R)
• M62: 28,310,051 km (0.119 R)
• M63: 29,557,248 km (0.077 R)
• M64: 30,187,504 km (0.085 R)
• M65: 31,653,862 km (0.081 R)
• M66: 31,846,844 km (0.042 R)
• M67: 32,234,003 km (0.11 R)
• M68: 32,298,629 km (0.104 R)
• M69: 33,798,049 km (0.119 R)
• M70: 34,324,783 km (0.108 R)
• M71: 34,523,149 km (0.1 R)
• M72: 34,589,272 km (0.11 R)
• M73: 34,655,544 km (0.12 R)
• M74: 37,067,211 km (0.076 R)
• M75: 37,406,349 km (0.112 R)
• M76: 37,474,267 km (0.088 R)
• M77: 39,394,056 km (0.067 R)
• M78: 39,463,170 km (0.117 R)
• M79: 40,296,131 km (0.063 R)
• M80: 40,575,131 km (0.082 R)
• M81: 40,644,993 km (0.092 R)
• M82: 42,687,603 km (0.057 R)
• M83: 42,758,662 km (0.098 R)
• M84: 43,328,330 km (0.108 R)
• M85: 44,044,007 km (0.045 R)
• M86: 44,403,191 km (0.057 R)
• M87: 45,124,702 km (0.035 R)
• M88: 45,197,107 km (0.03 R)
• M89: 46,287,077 km (0.112 R)
• M90: 47,532,928 km (0.108 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 196 - 11,498 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit