🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 1.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 672.5

Radius: 13.7

Gravity: 3.58 G

Time & Orbit

Eccentricity (e): 0.176

Orbit Range: 0.84 AU - 1.2 AU

Year: 711 Days

Day: 5.2 Hours

Environment

Temp: -186 °C

Axial Tilt: 1.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 36,371,164 km

• M1: 173,234 km (0.086 R)
• M2: 265,387 km (0.048 R)
• M3: 368,759 km (0.07 R)
• M4: 520,002 km (0.075 R)
• M5: 630,854 km (0.075 R)
• M6: 736,470 km (0.048 R)
• M7: 849,267 km (0.066 R)
• M8: 935,286 km (0.051 R)
• M9: 1,036,264 km (0.103 R)
• M10: 1,207,404 km (0.113 R)
• M11: 1,343,987 km (0.059 R)
• M12: 1,433,596 km (0.046 R)
• M13: 1,558,959 km (0.115 R)
• M14: 1,681,181 km (0.111 R)
• M15: 1,778,719 km (0.067 R)
• M16: 1,899,743 km (0.119 R)
• M17: 2,038,421 km (0.052 R)
• M18: 2,349,584 km (0.117 R)
• M19: 2,523,118 km (0.12 R)
• M20: 2,676,306 km (0.109 R)
• M21: 2,882,901 km (0.12 R)
• M22: 2,992,556 km (0.073 R)
• M23: 3,103,557 km (0.11 R)
• M24: 3,189,875 km (0.047 R)
• M25: 3,294,594 km (0.106 R)
• M26: 3,534,549 km (0.089 R)
• M27: 3,624,906 km (0.061 R)
• M28: 3,752,663 km (0.087 R)
• M29: 3,919,315 km (0.068 R)
• M30: 4,502,298 km (0.108 R)
• M31: 4,600,583 km (0.113 R)
• M32: 4,719,364 km (0.05 R)
• M33: 5,205,108 km (0.075 R)
• M34: 5,527,342 km (0.068 R)
• M35: 5,685,766 km (0.083 R)
• M36: 5,802,752 km (0.041 R)
• M37: 5,910,013 km (0.036 R)
• M38: 6,213,548 km (0.094 R)
• M39: 6,644,988 km (0.08 R)
• M40: 6,813,435 km (0.111 R)
• M41: 7,006,267 km (0.105 R)
• M42: 7,109,040 km (0.058 R)
• M43: 7,432,022 km (0.104 R)
• M44: 7,525,222 km (0.045 R)
• M45: 8,044,925 km (0.084 R)
• M46: 8,176,571 km (0.12 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.2 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 893.8

Radius: 8.2

Gravity: 13.29 G

Time & Orbit

Eccentricity (e): 0.112

Orbit Range: 1.07 AU - 1.33 AU

Year: 907 Days

Day: 6.3 Hours

Environment

Temp: -174 °C

Axial Tilt: 16.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 36,371,164 km

• M1: 113,994 km (0.03 R)
• M2: 179,517 km (0.088 R)
• M3: 240,853 km (0.044 R)
• M4: 321,486 km (0.086 R)
• M5: 766,091 km (0.089 R)
• M6: 862,282 km (0.061 R)
• M7: 949,049 km (0.084 R)
• M8: 1,003,951 km (0.048 R)
• M9: 1,138,889 km (0.109 R)
• M10: 1,272,479 km (0.086 R)
• M11: 1,380,040 km (0.107 R)
• M12: 1,450,800 km (0.1 R)
• M13: 1,579,604 km (0.079 R)
• M14: 1,637,349 km (0.062 R)
• M15: 1,771,688 km (0.055 R)
• M16: 1,875,060 km (0.116 R)
• M17: 1,989,203 km (0.098 R)
• M18: 2,069,537 km (0.063 R)
• M19: 2,187,719 km (0.101 R)
• M20: 2,308,146 km (0.066 R)
• M21: 2,383,393 km (0.092 R)
• M22: 2,449,815 km (0.06 R)
• M23: 2,516,984 km (0.12 R)
• M24: 2,623,647 km (0.109 R)
• M25: 3,024,570 km (0.059 R)
• M26: 3,148,736 km (0.07 R)
• M27: 3,476,954 km (0.059 R)
• M28: 3,530,959 km (0.099 R)
• M29: 3,672,777 km (0.077 R)
• M30: 3,771,961 km (0.087 R)
• M31: 3,973,170 km (0.08 R)
• M32: 4,293,160 km (0.04 R)
• M33: 4,386,060 km (0.106 R)
• M34: 4,479,708 km (0.104 R)
• M35: 4,716,671 km (0.045 R)
• M36: 4,812,713 km (0.111 R)
• M37: 4,897,236 km (0.119 R)
• M38: 5,277,514 km (0.094 R)
• M39: 5,502,658 km (0.089 R)
• M40: 5,807,838 km (0.099 R)
• M41: 5,910,761 km (0.116 R)
• M42: 6,014,283 km (0.108 R)
• M43: 6,315,573 km (0.082 R)
• M44: 6,461,282 km (0.116 R)
• M45: 6,594,723 km (0.111 R)
• M46: 6,796,830 km (0.116 R)
• M47: 6,932,515 km (0.077 R)
• M48: 6,987,118 km (0.066 R)
• M49: 7,220,640 km (0.108 R)
• M50: 7,387,143 km (0.083 R)
• M51: 7,610,941 km (0.079 R)
• M52: 7,822,921 km (0.111 R)
• M53: 7,950,977 km (0.069 R)
• M54: 8,022,335 km (0.104 R)
• M55: 8,353,844 km (0.09 R)
• M56: 8,543,235 km (0.079 R)
• M57: 8,660,520 km (0.057 R)
• M58: 8,822,534 km (0.061 R)
• M59: 8,926,206 km (0.102 R)
• M60: 9,134,745 km (0.104 R)
• M61: 9,239,613 km (0.11 R)
• M62: 9,526,392 km (0.119 R)
• M63: 9,663,274 km (0.064 R)
• M64: 9,846,681 km (0.114 R)
• M65: 10,232,644 km (0.095 R)
• M66: 10,372,817 km (0.116 R)
• M67: 10,435,349 km (0.115 R)
• M68: 10,513,589 km (0.093 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.74 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 94.5

Radius: 8.9

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.226

Orbit Range: 1.35 AU - 2.13 AU

Year: 1584 Days

Day: 13.9 Hours

Environment

Temp: -192 °C

Axial Tilt: 12.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (45)

Outer Limit: 36,371,164 km

• M1: 114,891 km (0.105 R)
• M2: 190,588 km (0.114 R)
• M3: 254,466 km (0.108 R)
• M4: 396,434 km (0.108 R)
• M5: 624,571 km (0.116 R)
• M6: 763,847 km (0.052 R)
• M7: 847,622 km (0.097 R)
• M8: 918,980 km (0.085 R)
• M9: 1,307,635 km (0.077 R)
• M10: 1,379,143 km (0.098 R)
• M11: 1,646,773 km (0.073 R)
• M12: 1,783,506 km (0.074 R)
• M13: 1,869,973 km (0.107 R)
• M14: 1,930,860 km (0.068 R)
• M15: 1,999,076 km (0.108 R)
• M16: 2,117,259 km (0.097 R)
• M17: 2,230,504 km (0.109 R)
• M18: 2,478,089 km (0.115 R)
• M19: 2,688,573 km (0.051 R)
• M20: 2,788,355 km (0.09 R)
• M21: 2,912,970 km (0.097 R)
• M22: 3,023,373 km (0.072 R)
• M23: 3,119,265 km (0.115 R)
• M24: 3,388,093 km (0.114 R)
• M25: 3,471,119 km (0.072 R)
• M26: 3,758,347 km (0.117 R)
• M27: 3,827,013 km (0.103 R)
• M28: 4,185,748 km (0.08 R)
• M29: 4,328,764 km (0.064 R)
• M30: 4,693,334 km (0.085 R)
• M31: 4,916,833 km (0.052 R)
• M32: 4,982,656 km (0.084 R)
• M33: 5,153,497 km (0.109 R)
• M34: 5,335,707 km (0.067 R)
• M35: 5,451,945 km (0.109 R)
• M36: 5,647,619 km (0.106 R)
• M37: 5,825,640 km (0.092 R)
• M38: 6,086,240 km (0.071 R)
• M39: 6,177,345 km (0.069 R)
• M40: 6,268,899 km (0.077 R)
• M41: 6,463,526 km (0.047 R)
• M42: 6,618,659 km (0.102 R)
• M43: 6,681,191 km (0.099 R)
• M44: 7,038,430 km (0.12 R)
• M45: 7,230,215 km (0.106 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 18.7

Radius: 8.5

Gravity: 0.26 G

Time & Orbit

Eccentricity (e): 0.067

Orbit Range: 1.94 AU - 2.22 AU

Year: 2071 Days

Day: 13 Hours

Environment

Temp: -210 °C

Axial Tilt: 0.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (24)

Outer Limit: 36,371,164 km

• M1: 187,596 km (0.082 R)
• M2: 248,183 km (0.052 R)
• M3: 345,571 km (0.085 R)
• M4: 398,828 km (0.115 R)
• M5: 518,506 km (0.106 R)
• M6: 598,691 km (0.04 R)
• M7: 772,823 km (0.073 R)
• M8: 1,209,798 km (0.11 R)
• M9: 1,324,240 km (0.081 R)
• M10: 1,740,122 km (0.102 R)
• M11: 1,849,030 km (0.07 R)
• M12: 2,101,102 km (0.056 R)
• M13: 2,183,830 km (0.106 R)
• M14: 2,267,754 km (0.099 R)
• M15: 2,381,299 km (0.059 R)
• M16: 3,337,379 km (0.063 R)
• M17: 3,519,290 km (0.09 R)
• M18: 3,684,596 km (0.044 R)
• M19: 3,961,052 km (0.058 R)
• M20: 4,167,647 km (0.095 R)
• M21: 4,314,403 km (0.102 R)
• M22: 4,519,950 km (0.047 R)
• M23: 4,750,480 km (0.091 R)
• M24: 4,933,289 km (0.094 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.67 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 707.3

Radius: 11.9

Gravity: 4.99 G

Time & Orbit

Eccentricity (e): 0.122

Orbit Range: 3.22 AU - 4.12 AU

Year: 4853 Days

Day: 7.5 Hours

Environment

Temp: -209 °C

Axial Tilt: 23.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 36,371,164 km

• M1: 197,320 km (0.047 R)
• M2: 342,878 km (0.075 R)
• M3: 451,337 km (0.094 R)
• M4: 531,970 km (0.101 R)
• M5: 652,845 km (0.088 R)
• M6: 784,042 km (0.102 R)
• M7: 925,113 km (0.071 R)
• M8: 1,463,666 km (0.097 R)
• M9: 1,624,633 km (0.071 R)
• M10: 1,774,829 km (0.063 R)
• M11: 2,346,143 km (0.08 R)
• M12: 2,516,835 km (0.033 R)
• M13: 2,652,669 km (0.055 R)
• M14: 3,074,535 km (0.079 R)
• M15: 3,410,383 km (0.07 R)
• M16: 3,670,234 km (0.111 R)
• M17: 3,936,518 km (0.118 R)
• M18: 4,140,420 km (0.087 R)
• M19: 4,347,913 km (0.116 R)
• M20: 4,653,691 km (0.087 R)
• M21: 4,773,219 km (0.084 R)
• M22: 4,869,560 km (0.064 R)
• M23: 5,236,823 km (0.114 R)
• M24: 5,336,306 km (0.117 R)
• M25: 5,537,066 km (0.051 R)
• M26: 5,868,874 km (0.093 R)
• M27: 6,102,247 km (0.119 R)
• M28: 6,391,868 km (0.102 R)
• M29: 6,739,982 km (0.034 R)
• M30: 6,848,291 km (0.087 R)
• M31: 6,957,199 km (0.029 R)
• M32: 7,232,159 km (0.047 R)
• M33: 7,398,811 km (0.099 R)
• M34: 7,594,934 km (0.091 R)
• M35: 7,935,120 km (0.06 R)
• M36: 8,718,714 km (0.072 R)
• M37: 9,015,366 km (0.078 R)
• M38: 9,134,895 km (0.078 R)
• M39: 11,022,820 km (0.112 R)
• M40: 11,570,049 km (0.118 R)
• M41: 12,858,535 km (0.092 R)
• M42: 13,094,750 km (0.087 R)
• M43: 14,401,338 km (0.086 R)
• M44: 14,752,145 km (0.053 R)
• M45: 15,105,795 km (0.099 R)
• M46: 15,247,913 km (0.111 R)
• M47: 15,462,137 km (0.112 R)
• M48: 15,641,355 km (0.09 R)
• M49: 16,256,053 km (0.097 R)
• M50: 16,658,022 km (0.064 R)
• M51: 16,878,529 km (0.098 R)
• M52: 17,546,334 km (0.091 R)
• M53: 17,808,280 km (0.109 R)
• M54: 18,564,049 km (0.072 R)
• M55: 18,678,341 km (0.113 R)
• M56: 18,984,119 km (0.12 R)
• M57: 19,137,756 km (0.076 R)
• M58: 20,381,064 km (0.069 R)
• M59: 21,211,033 km (0.061 R)
• M60: 21,810,771 km (0.059 R)
• M61: 21,891,105 km (0.116 R)
• M62: 22,213,638 km (0.066 R)
• M63: 22,456,585 km (0.117 R)
• M64: 22,904,182 km (0.076 R)
• M65: 23,974,106 km (0.072 R)
• M66: 24,431,576 km (0.077 R)
• M67: 24,640,415 km (0.079 R)
• M68: 24,724,190 km (0.087 R)
• M69: 25,694,033 km (0.099 R)
• M70: 25,821,340 km (0.054 R)
• M71: 26,034,218 km (0.078 R)
• M72: 27,280,069 km (0.079 R)
• M73: 28,589,200 km (0.118 R)
• M74: 28,941,802 km (0.118 R)
• M75: 29,695,776 km (0.107 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 807.2

Radius: 13.7

Gravity: 4.3 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 3.44 AU - 4.02 AU

Year: 4972 Days

Day: 7.5 Hours

Environment

Temp: -216 °C

Axial Tilt: 14.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 36,371,164 km

• M1: 228,436 km (0.072 R)
• M2: 377,286 km (0.098 R)
• M3: 634,893 km (0.107 R)
• M4: 730,786 km (0.067 R)
• M5: 1,261,110 km (0.106 R)
• M6: 1,451,548 km (0.072 R)
• M7: 1,617,751 km (0.114 R)
• M8: 1,988,156 km (0.089 R)
• M9: 2,193,254 km (0.115 R)
• M10: 2,405,384 km (0.093 R)
• M11: 2,644,741 km (0.078 R)
• M12: 2,955,007 km (0.026 R)
• M13: 3,255,549 km (0.056 R)
• M14: 3,588,703 km (0.087 R)
• M15: 3,886,553 km (0.084 R)
• M16: 4,121,272 km (0.044 R)
• M17: 4,240,352 km (0.05 R)
• M18: 4,336,393 km (0.101 R)
• M19: 4,653,990 km (0.078 R)
• M20: 5,004,647 km (0.102 R)
• M21: 5,106,374 km (0.114 R)
• M22: 5,337,951 km (0.086 R)
• M23: 5,784,800 km (0.113 R)
• M24: 5,972,396 km (0.028 R)
• M25: 6,408,773 km (0.075 R)
• M26: 6,547,300 km (0.116 R)
• M27: 6,686,875 km (0.096 R)
• M28: 6,912,319 km (0.114 R)
• M29: 7,574,140 km (0.101 R)
• M30: 7,809,158 km (0.117 R)
• M31: 8,166,249 km (0.1 R)
• M32: 8,742,649 km (0.097 R)
• M33: 10,289,641 km (0.108 R)
• M34: 10,714,199 km (0.081 R)
• M35: 10,945,179 km (0.054 R)
• M36: 11,580,521 km (0.085 R)
• M37: 11,681,948 km (0.062 R)
• M38: 12,022,134 km (0.095 R)
• M39: 12,538,695 km (0.106 R)
• M40: 12,712,378 km (0.06 R)
• M41: 13,132,898 km (0.084 R)
• M42: 13,415,638 km (0.1 R)
• M43: 15,376,866 km (0.115 R)
• M44: 15,637,765 km (0.088 R)
• M45: 17,040,394 km (0.079 R)
• M46: 17,233,076 km (0.107 R)
• M47: 18,128,719 km (0.093 R)
• M48: 18,285,946 km (0.077 R)
• M49: 18,601,897 km (0.082 R)
• M50: 19,079,264 km (0.113 R)
• M51: 19,399,702 km (0.054 R)
• M52: 21,070,112 km (0.089 R)
• M53: 21,277,006 km (0.102 R)
• M54: 21,567,675 km (0.09 R)
• M55: 21,901,577 km (0.114 R)
• M56: 22,490,095 km (0.076 R)
• M57: 22,616,804 km (0.112 R)
• M58: 22,913,607 km (0.098 R)
• M59: 23,083,699 km (0.087 R)
• M60: 23,682,540 km (0.067 R)
• M61: 23,811,493 km (0.055 R)
• M62: 23,983,979 km (0.118 R)
• M63: 24,633,982 km (0.069 R)
• M64: 24,721,048 km (0.115 R)
• M65: 25,026,826 km (0.111 R)
• M66: 25,377,633 km (0.105 R)
• M67: 25,907,060 km (0.084 R)
• M68: 26,484,807 km (0.056 R)
• M69: 26,663,427 km (0.113 R)
• M70: 27,517,182 km (0.089 R)
• M71: 28,654,425 km (0.059 R)
• M72: 29,390,147 km (0.088 R)
• M73: 30,272,176 km (0.09 R)
• M74: 30,365,525 km (0.057 R)
• M75: 30,739,819 km (0.086 R)

Asteroid Belt

Center: 4.85 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 7 - Ice Giant

Semi-Major Axis: 5.97 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 295.2

Radius: 6.3

Gravity: 7.44 G

Time & Orbit

Eccentricity (e): 0.246

Orbit Range: 4.5 AU - 7.44 AU

Year: 10069 Days

Day: 17.3 Hours

Environment

Temp: -222 °C

Axial Tilt: 19.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 36,371,164 km

• M1: 109,356 km (0.109 R)
• M2: 173,384 km (0.051 R)
• M3: 257,608 km (0.051 R)
• M4: 357,838 km (0.07 R)
• M5: 436,377 km (0.098 R)
• M6: 764,894 km (0.075 R)
• M7: 838,795 km (0.103 R)
• M8: 930,499 km (0.028 R)
• M9: 1,174,792 km (0.105 R)
• M10: 1,740,422 km (0.089 R)
• M11: 2,040,964 km (0.113 R)
• M12: 2,314,578 km (0.085 R)
• M13: 2,422,887 km (0.064 R)
• M14: 3,060,324 km (0.072 R)
• M15: 3,251,659 km (0.075 R)
• M16: 3,324,513 km (0.094 R)
• M17: 3,471,568 km (0.083 R)
• M18: 4,265,783 km (0.051 R)
• M19: 4,614,945 km (0.108 R)
• M20: 5,113,554 km (0.077 R)
• M21: 5,863,788 km (0.111 R)
• M22: 6,161,488 km (0.042 R)
• M23: 6,464,124 km (0.101 R)
• M24: 7,337,028 km (0.048 R)
• M25: 7,950,229 km (0.108 R)
• M26: 8,048,665 km (0.118 R)
• M27: 8,512,867 km (0.096 R)
• M28: 8,849,761 km (0.099 R)
• M29: 9,363,331 km (0.106 R)
• M30: 9,710,996 km (0.112 R)
• M31: 9,992,240 km (0.099 R)
• M32: 10,098,455 km (0.118 R)
• M33: 10,276,177 km (0.091 R)
• M34: 10,598,710 km (0.106 R)
• M35: 10,851,979 km (0.031 R)
• M36: 11,107,193 km (0.071 R)
• M37: 12,526,727 km (0.118 R)
• M38: 12,986,890 km (0.108 R)
• M39: 13,257,812 km (0.117 R)
• M40: 14,439,934 km (0.058 R)
• M41: 14,881,847 km (0.108 R)
• M42: 15,246,716 km (0.087 R)
• M43: 15,287,406 km (0.112 R)
• M44: 16,109,447 km (0.051 R)
• M45: 17,796,013 km (0.074 R)
• M46: 19,141,347 km (0.113 R)
• M47: 19,493,799 km (0.112 R)
• M48: 19,715,204 km (0.1 R)
• M49: 19,848,496 km (0.075 R)
• M50: 20,160,557 km (0.109 R)
• M51: 20,384,355 km (0.104 R)
• M52: 20,474,114 km (0.066 R)
• M53: 21,151,793 km (0.116 R)
• M54: 21,197,121 km (0.117 R)
• M55: 21,561,840 km (0.089 R)
• M56: 21,882,578 km (0.071 R)
• M57: 22,621,592 km (0.044 R)
• M58: 22,761,166 km (0.114 R)
• M59: 23,368,983 km (0.101 R)
• M60: 23,792,793 km (0.069 R)
• M61: 23,934,612 km (0.118 R)
• M62: 24,600,323 km (0.06 R)
• M63: 24,743,787 km (0.053 R)
• M64: 25,175,826 km (0.113 R)
• M65: 25,465,298 km (0.086 R)
• M66: 25,707,347 km (0.065 R)
• M67: 26,047,383 km (0.096 R)
• M68: 26,144,771 km (0.118 R)
• M69: 26,291,227 km (0.1 R)
• M70: 27,621,003 km (0.118 R)
• M71: 28,620,017 km (0.088 R)
• M72: 29,023,034 km (0.116 R)
• M73: 29,073,449 km (0.041 R)
• M74: 29,275,855 km (0.065 R)
• M75: 30,243,005 km (0.029 R)
• M76: 30,396,791 km (0.111 R)
• M77: 31,583,551 km (0.084 R)
• M78: 32,365,799 km (0.096 R)
• M79: 32,470,517 km (0.104 R)
• M80: 32,627,894 km (0.114 R)
• M81: 33,418,519 km (0.115 R)
• M82: 33,524,434 km (0.037 R)
• M83: 33,736,564 km (0.064 R)
• M84: 34,108,913 km (0.089 R)
• M85: 35,126,328 km (0.112 R)
• M86: 35,180,183 km (0.076 R)
• M87: 35,341,749 km (0.082 R)
• M88: 35,990,705 km (0.06 R)
• M89: 36,153,617 km (0.045 R)
• M90: 36,207,921 km (0.099 R)

Kuiper Belt

Range: 30 - 50 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 440 - 17,374 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit