🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 928

Radius: 9.1

Gravity: 11.21 G

Time & Orbit

Eccentricity (e): 0.208

Orbit Range: 0.43 AU - 0.65 AU

Year: 269 Days

Day: 13.7 Hours

Environment

Temp: -141 °C

Axial Tilt: 28.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (40)

Outer Limit: 26,106,474 km

• M1: 117,135 km (0.074 R)
• M2: 193,879 km (0.078 R)
• M3: 260,151 km (0.086 R)
• M4: 331,060 km (0.074 R)
• M5: 433,385 km (0.112 R)
• M6: 510,578 km (0.095 R)
• M7: 586,424 km (0.074 R)
• M8: 646,263 km (0.095 R)
• M9: 736,770 km (0.061 R)
• M10: 824,434 km (0.12 R)
• M11: 931,396 km (0.114 R)
• M12: 1,059,602 km (0.115 R)
• M13: 1,121,834 km (0.079 R)
• M14: 1,324,988 km (0.093 R)
• M15: 1,415,196 km (0.095 R)
• M16: 1,484,310 km (0.067 R)
• M17: 1,545,047 km (0.058 R)
• M18: 1,616,255 km (0.076 R)
• M19: 1,688,661 km (0.109 R)
• M20: 1,836,763 km (0.056 R)
• M21: 1,948,213 km (0.063 R)
• M22: 2,140,746 km (0.082 R)
• M23: 2,209,860 km (0.083 R)
• M24: 2,377,858 km (0.113 R)
• M25: 2,686,329 km (0.039 R)
• M26: 2,743,775 km (0.106 R)
• M27: 2,912,820 km (0.074 R)
• M28: 3,025,467 km (0.066 R)
• M29: 3,279,634 km (0.108 R)
• M30: 3,353,535 km (0.03 R)
• M31: 3,440,452 km (0.07 R)
• M32: 3,515,700 km (0.052 R)
• M33: 3,642,110 km (0.097 R)
• M34: 3,750,867 km (0.048 R)
• M35: 3,841,225 km (0.103 R)
• M36: 3,925,747 km (0.114 R)
• M37: 4,303,931 km (0.118 R)
• M38: 4,398,477 km (0.081 R)
• M39: 4,672,839 km (0.036 R)
• M40: 4,735,371 km (0.108 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.83 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 620.1

Radius: 12.5

Gravity: 3.97 G

Time & Orbit

Eccentricity (e): 0.051

Orbit Range: 0.79 AU - 0.87 AU

Year: 513 Days

Day: 8.7 Hours

Environment

Temp: -162 °C

Axial Tilt: 17.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (39)

Outer Limit: 26,106,474 km

• M1: 221,106 km (0.093 R)
• M2: 321,336 km (0.091 R)
• M3: 482,603 km (0.108 R)
• M4: 562,638 km (0.077 R)
• M5: 652,396 km (0.087 R)
• M6: 747,840 km (0.115 R)
• M7: 862,432 km (0.096 R)
• M8: 954,883 km (0.116 R)
• M9: 1,041,351 km (0.104 R)
• M10: 1,151,006 km (0.114 R)
• M11: 1,243,906 km (0.107 R)
• M12: 1,404,574 km (0.113 R)
• M13: 1,510,041 km (0.111 R)
• M14: 1,659,040 km (0.111 R)
• M15: 1,747,303 km (0.093 R)
• M16: 1,965,866 km (0.078 R)
• M17: 2,161,390 km (0.078 R)
• M18: 2,297,524 km (0.087 R)
• M19: 2,661,346 km (0.069 R)
• M20: 2,744,672 km (0.035 R)
• M21: 2,828,896 km (0.045 R)
• M22: 2,935,559 km (0.082 R)
• M23: 3,138,115 km (0.118 R)
• M24: 3,300,727 km (0.094 R)
• M25: 3,466,033 km (0.118 R)
• M26: 3,641,960 km (0.038 R)
• M27: 3,735,010 km (0.113 R)
• M28: 4,074,747 km (0.113 R)
• M29: 4,432,884 km (0.085 R)
• M30: 4,557,350 km (0.106 R)
• M31: 4,801,344 km (0.052 R)
• M32: 4,937,777 km (0.086 R)
• M33: 5,092,910 km (0.034 R)
• M34: 5,550,081 km (0.037 R)
• M35: 5,639,541 km (0.109 R)
• M36: 5,729,449 km (0.087 R)
• M37: 5,929,162 km (0.098 R)
• M38: 6,121,844 km (0.067 R)
• M39: 6,372,720 km (0.07 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.47 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 892.1

Radius: 13.8

Gravity: 4.68 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 1.38 AU - 1.56 AU

Year: 1209 Days

Day: 13.5 Hours

Environment

Temp: -194 °C

Axial Tilt: 33.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 26,106,474 km

• M1: 176,077 km (0.117 R)
• M2: 280,346 km (0.091 R)
• M3: 405,410 km (0.109 R)
• M4: 512,522 km (0.063 R)
• M5: 763,398 km (0.047 R)
• M6: 1,064,389 km (0.112 R)
• M7: 1,233,883 km (0.079 R)
• M8: 1,360,742 km (0.083 R)
• M9: 1,646,773 km (0.113 R)
• M10: 2,510,851 km (0.06 R)
• M11: 2,630,679 km (0.054 R)
• M12: 2,730,161 km (0.086 R)
• M13: 2,955,755 km (0.085 R)
• M14: 3,059,426 km (0.12 R)
• M15: 3,223,086 km (0.085 R)
• M16: 3,546,966 km (0.074 R)
• M17: 3,706,886 km (0.111 R)
• M18: 3,818,934 km (0.113 R)
• M19: 3,932,180 km (0.065 R)
• M20: 4,059,338 km (0.108 R)
• M21: 4,582,033 km (0.116 R)
• M22: 4,702,609 km (0.025 R)
• M23: 4,797,155 km (0.098 R)
• M24: 4,988,191 km (0.066 R)
• M25: 5,462,566 km (0.114 R)
• M26: 5,619,345 km (0.105 R)
• M27: 5,719,725 km (0.115 R)
• M28: 5,995,583 km (0.088 R)
• M29: 6,350,280 km (0.114 R)
• M30: 6,575,425 km (0.081 R)
• M31: 6,818,671 km (0.11 R)
• M32: 6,941,341 km (0.104 R)
• M33: 7,049,351 km (0.057 R)
• M34: 7,157,959 km (0.092 R)
• M35: 7,471,217 km (0.114 R)
• M36: 7,629,491 km (0.066 R)
• M37: 7,836,984 km (0.046 R)
• M38: 7,949,481 km (0.115 R)
• M39: 8,290,415 km (0.055 R)
• M40: 8,470,830 km (0.09 R)
• M41: 8,569,864 km (0.07 R)
• M42: 9,121,281 km (0.09 R)
• M43: 9,239,763 km (0.099 R)
• M44: 9,443,964 km (0.105 R)
• M45: 9,563,941 km (0.111 R)
• M46: 9,874,507 km (0.055 R)
• M47: 9,961,273 km (0.114 R)
• M48: 10,135,854 km (0.054 R)
• M49: 10,452,553 km (0.084 R)
• M50: 10,558,767 km (0.119 R)
• M51: 10,790,345 km (0.098 R)
• M52: 11,240,335 km (0.06 R)
• M53: 11,422,097 km (0.084 R)
• M54: 11,513,351 km (0.07 R)
• M55: 11,641,557 km (0.098 R)
• M56: 11,733,410 km (0.084 R)
• M57: 12,570,709 km (0.086 R)
• M58: 12,778,351 km (0.077 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.79 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 991.6

Radius: 9.5

Gravity: 10.99 G

Time & Orbit

Eccentricity (e): 0.228

Orbit Range: 1.38 AU - 2.2 AU

Year: 1624 Days

Day: 14.4 Hours

Environment

Temp: -206 °C

Axial Tilt: 21.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 26,106,474 km

• M1: 156,779 km (0.102 R)
• M2: 218,562 km (0.056 R)
• M3: 313,707 km (0.073 R)
• M4: 383,719 km (0.081 R)
• M5: 522,246 km (0.09 R)
• M6: 602,281 km (0.101 R)
• M7: 1,124,527 km (0.066 R)
• M8: 1,594,564 km (0.107 R)
• M9: 1,671,158 km (0.109 R)
• M10: 2,037,673 km (0.067 R)
• M11: 2,391,322 km (0.069 R)
• M12: 2,978,045 km (0.112 R)
• M13: 3,323,018 km (0.055 R)
• M14: 3,407,690 km (0.033 R)
• M15: 3,579,279 km (0.063 R)
• M16: 3,931,133 km (0.063 R)
• M17: 4,020,892 km (0.054 R)
• M18: 4,156,726 km (0.115 R)
• M19: 4,232,872 km (0.065 R)
• M20: 4,294,207 km (0.081 R)
• M21: 4,355,692 km (0.05 R)
• M22: 4,464,150 km (0.114 R)
• M23: 4,620,629 km (0.117 R)
• M24: 4,699,617 km (0.118 R)
• M25: 4,987,593 km (0.055 R)
• M26: 5,068,675 km (0.104 R)
• M27: 5,681,877 km (0.115 R)
• M28: 5,766,549 km (0.034 R)
• M29: 6,057,667 km (0.069 R)
• M30: 6,126,781 km (0.084 R)
• M31: 6,248,553 km (0.062 R)
• M32: 6,335,919 km (0.048 R)
• M33: 6,459,038 km (0.041 R)
• M34: 6,565,252 km (0.113 R)
• M35: 7,032,147 km (0.107 R)
• M36: 7,546,913 km (0.088 R)
• M37: 7,771,161 km (0.11 R)
• M38: 8,169,091 km (0.097 R)
• M39: 8,283,982 km (0.07 R)
• M40: 8,380,174 km (0.085 R)
• M41: 8,476,814 km (0.067 R)
• M42: 8,573,753 km (0.027 R)
• M43: 8,984,848 km (0.032 R)
• M44: 9,063,836 km (0.083 R)
• M45: 9,202,812 km (0.098 R)
• M46: 9,442,618 km (0.116 R)
• M47: 10,051,032 km (0.111 R)
• M48: 10,256,580 km (0.112 R)
• M49: 10,422,184 km (0.089 R)
• M50: 11,433,915 km (0.066 R)
• M51: 11,627,046 km (0.095 R)
• M52: 11,886,299 km (0.101 R)
• M53: 11,973,215 km (0.111 R)
• M54: 12,235,011 km (0.096 R)
• M55: 12,454,621 km (0.096 R)
• M56: 12,653,437 km (0.118 R)
• M57: 12,831,009 km (0.101 R)
• M58: 13,121,379 km (0.048 R)
• M59: 13,301,195 km (0.042 R)
• M60: 13,913,948 km (0.041 R)
• M61: 14,051,279 km (0.065 R)
• M62: 14,189,208 km (0.066 R)
• M63: 14,396,850 km (0.097 R)
• M64: 14,489,451 km (0.045 R)
• M65: 14,628,727 km (0.118 R)
• M66: 14,721,926 km (0.119 R)
• M67: 14,978,936 km (0.035 R)
• M68: 15,049,396 km (0.106 R)
• M69: 15,190,467 km (0.082 R)
• M70: 15,331,987 km (0.066 R)
• M71: 15,545,014 km (0.081 R)
• M72: 15,806,810 km (0.11 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 227.5

Radius: 11.6

Gravity: 1.69 G

Time & Orbit

Eccentricity (e): 0.115

Orbit Range: 2.75 AU - 3.47 AU

Year: 3720 Days

Day: 9.4 Hours

Environment

Temp: -210 °C

Axial Tilt: 31.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (60)

Outer Limit: 26,106,474 km

• M1: 182,061 km (0.06 R)
• M2: 340,335 km (0.1 R)
• M3: 466,297 km (0.041 R)
• M4: 544,087 km (0.105 R)
• M5: 666,608 km (0.066 R)
• M6: 851,960 km (0.103 R)
• M7: 960,718 km (0.098 R)
• M8: 1,163,123 km (0.107 R)
• M9: 1,379,891 km (0.085 R)
• M10: 1,576,612 km (0.114 R)
• M11: 1,736,083 km (0.091 R)
• M12: 1,913,058 km (0.096 R)
• M13: 2,071,332 km (0.11 R)
• M14: 2,336,569 km (0.114 R)
• M15: 2,466,719 km (0.055 R)
• M16: 2,626,340 km (0.104 R)
• M17: 2,721,036 km (0.115 R)
• M18: 2,899,955 km (0.09 R)
• M19: 3,068,552 km (0.108 R)
• M20: 3,182,844 km (0.037 R)
• M21: 3,284,122 km (0.086 R)
• M22: 3,371,637 km (0.103 R)
• M23: 3,624,308 km (0.091 R)
• M24: 3,898,521 km (0.113 R)
• M25: 4,053,803 km (0.062 R)
• M26: 4,163,907 km (0.037 R)
• M27: 4,679,421 km (0.072 R)
• M28: 5,164,118 km (0.093 R)
• M29: 5,560,104 km (0.115 R)
• M30: 5,752,936 km (0.115 R)
• M31: 5,948,161 km (0.081 R)
• M32: 6,235,838 km (0.086 R)
• M33: 6,345,044 km (0.119 R)
• M34: 6,436,448 km (0.101 R)
• M35: 6,918,902 km (0.119 R)
• M36: 7,683,945 km (0.075 R)
• M37: 8,255,409 km (0.097 R)
• M38: 8,718,414 km (0.094 R)
• M39: 9,944,668 km (0.085 R)
• M40: 10,351,125 km (0.09 R)
• M41: 10,567,145 km (0.086 R)
• M42: 10,850,334 km (0.114 R)
• M43: 11,047,803 km (0.055 R)
• M44: 11,136,065 km (0.093 R)
• M45: 11,782,328 km (0.112 R)
• M46: 11,894,975 km (0.101 R)
• M47: 11,985,333 km (0.103 R)
• M48: 12,189,534 km (0.108 R)
• M49: 12,280,639 km (0.119 R)
• M50: 12,971,482 km (0.107 R)
• M51: 13,769,586 km (0.098 R)
• M52: 13,864,581 km (0.117 R)
• M53: 14,487,058 km (0.086 R)
• M54: 14,559,463 km (0.07 R)
• M55: 14,972,204 km (0.086 R)
• M56: 15,241,181 km (0.069 R)
• M57: 15,933,370 km (0.109 R)
• M58: 16,082,968 km (0.043 R)
• M59: 16,762,292 km (0.098 R)
• M60: 16,965,296 km (0.097 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 776.9

Radius: 12.4

Gravity: 5.05 G

Time & Orbit

Eccentricity (e): 0.136

Orbit Range: 3.57 AU - 4.69 AU

Year: 5693 Days

Day: 6.2 Hours

Environment

Temp: -223 °C

Axial Tilt: 36.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 26,106,474 km

• M1: 157,227 km (0.111 R)
• M2: 273,465 km (0.032 R)
• M3: 480,508 km (0.058 R)
• M4: 571,314 km (0.078 R)
• M5: 773,720 km (0.076 R)
• M6: 856,298 km (0.094 R)
• M7: 1,235,080 km (0.094 R)
• M8: 1,418,188 km (0.113 R)
• M9: 1,575,116 km (0.076 R)
• M10: 1,756,279 km (0.076 R)
• M11: 2,100,354 km (0.083 R)
• M12: 2,240,079 km (0.118 R)
• M13: 2,486,915 km (0.11 R)
• M14: 2,656,559 km (0.099 R)
• M15: 3,074,835 km (0.072 R)
• M16: 3,165,641 km (0.099 R)
• M17: 3,257,344 km (0.114 R)
• M18: 3,467,080 km (0.099 R)
• M19: 3,633,283 km (0.119 R)
• M20: 4,072,952 km (0.111 R)
• M21: 4,529,674 km (0.093 R)
• M22: 5,191,345 km (0.071 R)
• M23: 5,409,609 km (0.081 R)
• M24: 5,492,187 km (0.096 R)
• M25: 5,603,039 km (0.043 R)
• M26: 5,855,111 km (0.086 R)
• M27: 6,312,581 km (0.115 R)
• M28: 6,781,720 km (0.098 R)
• M29: 6,930,570 km (0.078 R)
• M30: 7,909,389 km (0.087 R)
• M31: 8,129,447 km (0.061 R)
• M32: 8,256,007 km (0.116 R)
• M33: 8,931,292 km (0.07 R)
• M34: 9,062,041 km (0.08 R)
• M35: 9,226,299 km (0.108 R)
• M36: 9,758,568 km (0.101 R)
• M37: 9,960,675 km (0.066 R)
• M38: 10,369,227 km (0.117 R)
• M39: 10,887,733 km (0.047 R)
• M40: 11,132,625 km (0.109 R)
• M41: 11,379,312 km (0.099 R)
• M42: 11,663,548 km (0.03 R)
• M43: 12,021,984 km (0.062 R)
• M44: 12,493,517 km (0.104 R)
• M45: 12,860,480 km (0.114 R)
• M46: 14,172,304 km (0.09 R)
• M47: 14,786,254 km (0.062 R)
• M48: 15,291,446 km (0.101 R)
• M49: 15,605,152 km (0.113 R)
• M50: 15,881,310 km (0.119 R)
• M51: 15,960,597 km (0.104 R)
• M52: 16,238,998 km (0.117 R)
• M53: 17,449,993 km (0.119 R)
• M54: 18,983,521 km (0.105 R)
• M55: 19,532,545 km (0.112 R)
• M56: 19,915,665 km (0.054 R)
• M57: 20,086,805 km (0.11 R)
• M58: 20,172,525 km (0.12 R)
• M59: 20,516,750 km (0.104 R)
• M60: 20,949,686 km (0.092 R)
• M61: 21,080,135 km (0.068 R)
• M62: 21,167,201 km (0.104 R)
• M63: 21,604,625 km (0.046 R)
• M64: 21,824,534 km (0.1 R)
• M65: 21,956,779 km (0.091 R)
• M66: 22,222,165 km (0.052 R)
• M67: 23,249,155 km (0.117 R)
• M68: 23,384,242 km (0.117 R)
• M69: 23,972,760 km (0.107 R)
• M70: 24,474,511 km (0.052 R)
• M71: 25,072,005 km (0.079 R)
• M72: 25,164,307 km (0.054 R)
• M73: 25,674,136 km (0.06 R)
• M74: 26,468,950 km (0.113 R)
• M75: 27,604,846 km (0.098 R)
• M76: 28,322,766 km (0.112 R)
• M77: 28,998,350 km (0.102 R)
• M78: 30,218,022 km (0.059 R)
• M79: 31,504,264 km (0.109 R)
• M80: 32,909,437 km (0.052 R)
• M81: 33,010,565 km (0.106 R)
• M82: 33,263,835 km (0.116 R)
• M83: 33,365,411 km (0.087 R)

Asteroid Belt

Center: 4.8 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 7 - Gas Giant

Semi-Major Axis: 5.46 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 147.8

Radius: 13.4

Gravity: 0.82 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 4.59 AU - 6.33 AU

Year: 8653 Days

Day: 14.9 Hours

Environment

Temp: -226 °C

Axial Tilt: 35.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 26,106,474 km

• M1: 178,769 km (0.089 R)
• M2: 275,410 km (0.095 R)
• M3: 358,736 km (0.058 R)
• M4: 456,722 km (0.08 R)
• M5: 616,493 km (0.088 R)
• M6: 710,141 km (0.101 R)
• M7: 878,738 km (0.111 R)
• M8: 986,897 km (0.113 R)
• M9: 1,087,277 km (0.107 R)
• M10: 1,354,609 km (0.11 R)
• M11: 1,467,705 km (0.065 R)
• M12: 1,749,547 km (0.109 R)
• M13: 1,936,993 km (0.073 R)
• M14: 2,366,040 km (0.084 R)
• M15: 2,539,125 km (0.049 R)
• M16: 2,680,794 km (0.109 R)
• M17: 2,898,309 km (0.107 R)
• M18: 3,009,311 km (0.101 R)
• M19: 3,254,801 km (0.117 R)
• M20: 3,506,873 km (0.078 R)
• M21: 3,625,504 km (0.096 R)
• M22: 3,866,656 km (0.085 R)
• M23: 4,051,260 km (0.066 R)
• M24: 4,175,875 km (0.105 R)
• M25: 4,709,042 km (0.069 R)
• M26: 4,994,923 km (0.081 R)
• M27: 6,052,131 km (0.03 R)
• M28: 6,195,147 km (0.1 R)
• M29: 6,315,125 km (0.1 R)
• M30: 6,484,469 km (0.111 R)
• M31: 7,051,445 km (0.106 R)
• M32: 7,252,505 km (0.101 R)
• M33: 7,557,535 km (0.12 R)
• M34: 7,944,993 km (0.075 R)
• M35: 8,206,790 km (0.06 R)
• M36: 8,605,019 km (0.081 R)
• M37: 8,901,073 km (0.115 R)
• M38: 9,227,945 km (0.072 R)
• M39: 9,337,749 km (0.115 R)
• M40: 9,531,030 km (0.11 R)
• M41: 10,062,402 km (0.096 R)
• M42: 10,203,772 km (0.102 R)
• M43: 10,545,902 km (0.047 R)
• M44: 10,805,005 km (0.06 R)
• M45: 10,978,988 km (0.059 R)
• M46: 11,212,360 km (0.086 R)
• M47: 11,447,379 km (0.041 R)
• M48: 11,535,941 km (0.086 R)
• M49: 11,624,652 km (0.105 R)
• M50: 11,922,202 km (0.103 R)
• M51: 12,525,082 km (0.118 R)
• M52: 13,045,234 km (0.072 R)
• M53: 13,416,685 km (0.098 R)
• M54: 13,980,519 km (0.112 R)
• M55: 14,360,648 km (0.078 R)
• M56: 15,066,600 km (0.107 R)
• M57: 16,113,486 km (0.119 R)
• M58: 16,312,451 km (0.074 R)
• M59: 16,578,885 km (0.049 R)
• M60: 17,967,303 km (0.103 R)
• M61: 18,346,234 km (0.119 R)
• M62: 19,498,586 km (0.045 R)
• M63: 20,030,108 km (0.05 R)
• M64: 20,890,595 km (0.079 R)
• M65: 22,425,319 km (0.106 R)
• M66: 22,944,873 km (0.045 R)
• M67: 23,206,220 km (0.056 R)
• M68: 23,393,517 km (0.113 R)
• M69: 23,920,550 km (0.08 R)
• M70: 25,447,795 km (0.106 R)
• M71: 25,679,671 km (0.055 R)

Kuiper Belt

Range: 30 - 53 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 388 - 20,268 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit