🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.34 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.68 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 785.5

Radius: 12.7

Gravity: 4.87 G

Time & Orbit

Eccentricity (e): 0.073

Orbit Range: 0.63 AU - 0.73 AU

Year: 387 Days

Day: 9.6 Hours

Environment

Temp: -166 °C

Axial Tilt: 12.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 61,877,236 km

• M1: 161,267 km (0.089 R)
• M2: 298,747 km (0.082 R)
• M3: 401,670 km (0.082 R)
• M4: 584,329 km (0.056 R)
• M5: 695,181 km (0.104 R)
• M6: 785,838 km (0.099 R)
• M7: 967,449 km (0.037 R)
• M8: 1,130,810 km (0.064 R)
• M9: 1,235,529 km (0.078 R)
• M10: 1,338,751 km (0.075 R)
• M11: 1,445,115 km (0.081 R)
• M12: 1,570,329 km (0.098 R)
• M13: 1,732,194 km (0.101 R)
• M14: 1,854,415 km (0.104 R)
• M15: 1,939,686 km (0.094 R)
• M16: 2,102,299 km (0.067 R)
• M17: 2,257,432 km (0.105 R)
• M18: 2,360,954 km (0.092 R)
• M19: 2,478,687 km (0.046 R)
• M20: 2,611,231 km (0.093 R)
• M21: 2,694,407 km (0.048 R)
• M22: 2,936,307 km (0.091 R)
• M23: 3,043,120 km (0.102 R)
• M24: 3,137,815 km (0.052 R)
• M25: 3,295,342 km (0.109 R)
• M26: 3,378,668 km (0.097 R)
• M27: 3,490,866 km (0.105 R)
• M28: 3,632,835 km (0.115 R)
• M29: 3,791,408 km (0.053 R)
• M30: 3,886,104 km (0.104 R)
• M31: 3,966,887 km (0.107 R)
• M32: 4,070,558 km (0.082 R)
• M33: 4,356,589 km (0.119 R)
• M34: 4,440,663 km (0.079 R)
• M35: 4,525,186 km (0.119 R)
• M36: 4,664,910 km (0.082 R)
• M37: 4,900,826 km (0.052 R)
• M38: 5,004,348 km (0.12 R)
• M39: 5,132,703 km (0.119 R)
• M40: 5,425,616 km (0.116 R)
• M41: 5,524,500 km (0.099 R)
• M42: 5,707,308 km (0.12 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.26 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 532

Radius: 10.4

Gravity: 4.92 G

Time & Orbit

Eccentricity (e): 0.166

Orbit Range: 1.05 AU - 1.47 AU

Year: 976 Days

Day: 8.8 Hours

Environment

Temp: -182 °C

Axial Tilt: 34.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (60)

Outer Limit: 61,877,236 km

• M1: 137,181 km (0.092 R)
• M2: 203,004 km (0.106 R)
• M3: 281,992 km (0.117 R)
• M4: 403,316 km (0.077 R)
• M5: 521,947 km (0.096 R)
• M6: 653,892 km (0.077 R)
• M7: 718,967 km (0.106 R)
• M8: 821,143 km (0.067 R)
• M9: 898,335 km (0.113 R)
• M10: 1,003,203 km (0.049 R)
• M11: 1,158,785 km (0.094 R)
• M12: 1,260,212 km (0.079 R)
• M13: 1,371,812 km (0.072 R)
• M14: 1,465,162 km (0.118 R)
• M15: 1,553,125 km (0.04 R)
• M16: 1,688,661 km (0.105 R)
• M17: 1,765,704 km (0.086 R)
• M18: 1,836,164 km (0.077 R)
• M19: 1,923,529 km (0.119 R)
• M20: 1,996,084 km (0.041 R)
• M21: 2,119,203 km (0.111 R)
• M22: 2,202,679 km (0.094 R)
• M23: 2,321,460 km (0.069 R)
• M24: 2,574,430 km (0.111 R)
• M25: 2,681,691 km (0.077 R)
• M26: 2,827,250 km (0.097 R)
• M27: 2,919,552 km (0.037 R)
• M28: 2,984,777 km (0.086 R)
• M29: 3,386,297 km (0.109 R)
• M30: 3,653,629 km (0.103 R)
• M31: 3,744,285 km (0.118 R)
• M32: 4,083,274 km (0.114 R)
• M33: 4,187,992 km (0.094 R)
• M34: 4,346,716 km (0.052 R)
• M35: 4,485,991 km (0.09 R)
• M36: 4,659,375 km (0.118 R)
• M37: 4,768,881 km (0.118 R)
• M38: 5,001,655 km (0.112 R)
• M39: 5,125,073 km (0.09 R)
• M40: 5,352,163 km (0.119 R)
• M41: 5,559,356 km (0.101 R)
• M42: 5,663,925 km (0.089 R)
• M43: 5,863,339 km (0.106 R)
• M44: 6,029,243 km (0.103 R)
• M45: 6,160,740 km (0.109 R)
• M46: 6,244,963 km (0.079 R)
• M47: 6,511,995 km (0.085 R)
• M48: 6,745,817 km (0.066 R)
• M49: 6,944,782 km (0.103 R)
• M50: 7,412,425 km (0.095 R)
• M51: 7,489,169 km (0.059 R)
• M52: 7,669,434 km (0.118 R)
• M53: 7,981,794 km (0.108 R)
• M54: 8,073,647 km (0.083 R)
• M55: 8,139,471 km (0.106 R)
• M56: 8,258,550 km (0.036 R)
• M57: 8,632,396 km (0.106 R)
• M58: 9,052,915 km (0.079 R)
• M59: 9,231,236 km (0.118 R)
• M60: 9,300,051 km (0.035 R)

Planet 3 - Gas Giant

Semi-Major Axis: 5.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 113

Radius: 11.7

Gravity: 0.83 G

Time & Orbit

Eccentricity (e): 0.1

Orbit Range: 4.55 AU - 5.56 AU

Year: 7833 Days

Day: 8 Hours

Environment

Temp: -222 °C

Axial Tilt: 24.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (53)

Outer Limit: 61,877,236 km

• M1: 217,964 km (0.115 R)
• M2: 322,982 km (0.039 R)
• M3: 556,504 km (0.076 R)
• M4: 1,045,091 km (0.054 R)
• M5: 1,149,959 km (0.066 R)
• M6: 1,383,631 km (0.119 R)
• M7: 1,728,603 km (0.098 R)
• M8: 1,854,565 km (0.093 R)
• M9: 1,998,029 km (0.054 R)
• M10: 2,190,412 km (0.11 R)
• M11: 2,435,603 km (0.12 R)
• M12: 2,625,592 km (0.067 R)
• M13: 2,803,913 km (0.093 R)
• M14: 3,363,559 km (0.032 R)
• M15: 3,593,490 km (0.101 R)
• M16: 3,994,712 km (0.114 R)
• M17: 4,390,997 km (0.054 R)
• M18: 4,819,894 km (0.032 R)
• M19: 5,019,457 km (0.068 R)
• M20: 5,385,374 km (0.091 R)
• M21: 5,739,023 km (0.081 R)
• M22: 5,865,583 km (0.113 R)
• M23: 6,381,546 km (0.116 R)
• M24: 7,273,748 km (0.079 R)
• M25: 7,921,506 km (0.032 R)
• M26: 8,443,453 km (0.116 R)
• M27: 8,539,645 km (0.094 R)
• M28: 8,927,702 km (0.12 R)
• M29: 9,050,222 km (0.087 R)
• M30: 9,222,709 km (0.077 R)
• M31: 9,296,909 km (0.085 R)
• M32: 9,520,857 km (0.116 R)
• M33: 9,721,318 km (0.096 R)
• M34: 11,775,896 km (0.083 R)
• M35: 11,883,456 km (0.095 R)
• M36: 11,991,317 km (0.05 R)
• M37: 12,072,399 km (0.089 R)
• M38: 12,535,404 km (0.113 R)
• M39: 12,617,683 km (0.112 R)
• M40: 13,143,370 km (0.116 R)
• M41: 13,647,814 km (0.088 R)
• M42: 14,130,267 km (0.104 R)
• M43: 15,082,607 km (0.087 R)
• M44: 15,404,691 km (0.05 R)
• M45: 17,876,347 km (0.048 R)
• M46: 18,155,048 km (0.097 R)
• M47: 18,622,841 km (0.085 R)
• M48: 19,316,077 km (0.03 R)
• M49: 19,474,800 km (0.112 R)
• M50: 20,114,032 km (0.069 R)
• M51: 20,468,729 km (0.058 R)
• M52: 21,544,786 km (0.066 R)
• M53: 21,709,344 km (0.086 R)

Planet 4 - Ice Giant

Semi-Major Axis: 6.06 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 869.4

Radius: 4.2

Gravity: 49.29 G

Time & Orbit

Eccentricity (e): 0.211

Orbit Range: 4.78 AU - 7.34 AU

Year: 10297 Days

Day: 22.2 Hours

Environment

Temp: -217 °C

Axial Tilt: 20.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 61,877,236 km

• M1: 248,781 km (0.111 R)
• M2: 491,130 km (0.074 R)
• M3: 790,774 km (0.111 R)
• M4: 928,404 km (0.102 R)
• M5: 1,724,115 km (0.027 R)
• M6: 2,060,411 km (0.078 R)
• M7: 2,222,576 km (0.085 R)
• M8: 2,473,302 km (0.064 R)
• M9: 3,001,532 km (0.092 R)
• M10: 3,154,421 km (0.048 R)
• M11: 3,372,534 km (0.118 R)
• M12: 3,989,177 km (0.081 R)
• M13: 4,396,233 km (0.099 R)
• M14: 4,995,223 km (0.074 R)
• M15: 5,067,478 km (0.047 R)
• M16: 5,694,742 km (0.111 R)
• M17: 6,385,136 km (0.099 R)
• M18: 6,424,331 km (0.066 R)
• M19: 6,581,558 km (0.113 R)
• M20: 6,780,075 km (0.048 R)
• M21: 6,859,960 km (0.084 R)
• M22: 7,552,000 km (0.066 R)
• M23: 8,826,424 km (0.089 R)
• M24: 9,310,074 km (0.114 R)
• M25: 9,757,222 km (0.102 R)
• M26: 12,095,885 km (0.088 R)
• M27: 12,144,355 km (0.106 R)
• M28: 12,436,520 km (0.077 R)
• M29: 12,681,711 km (0.105 R)
• M30: 12,730,928 km (0.118 R)
• M31: 13,376,892 km (0.072 R)
• M32: 15,377,464 km (0.096 R)
• M33: 15,958,353 km (0.091 R)
• M34: 16,546,422 km (0.041 R)
• M35: 16,816,147 km (0.072 R)
• M36: 17,305,182 km (0.032 R)
• M37: 17,909,109 km (0.111 R)
• M38: 18,241,516 km (0.083 R)
• M39: 18,352,816 km (0.112 R)
• M40: 19,477,643 km (0.068 R)
• M41: 19,534,490 km (0.059 R)
• M42: 19,705,331 km (0.072 R)
• M43: 20,220,695 km (0.026 R)
• M44: 20,393,481 km (0.091 R)
• M45: 20,508,970 km (0.06 R)
• M46: 20,914,830 km (0.086 R)
• M47: 21,147,903 km (0.06 R)
• M48: 21,206,246 km (0.095 R)
• M49: 21,381,874 km (0.114 R)
• M50: 22,266,895 km (0.097 R)
• M51: 22,326,285 km (0.094 R)
• M52: 22,504,905 km (0.081 R)
• M53: 22,564,445 km (0.044 R)
• M54: 22,683,974 km (0.111 R)
• M55: 22,863,491 km (0.098 R)
• M56: 23,043,458 km (0.08 R)
• M57: 23,404,886 km (0.055 R)
• M58: 24,194,464 km (0.108 R)
• M59: 24,869,300 km (0.103 R)
• M60: 26,425,865 km (0.093 R)
• M61: 26,930,609 km (0.11 R)
• M62: 27,247,756 km (0.087 R)
• M63: 27,311,335 km (0.084 R)
• M64: 27,502,222 km (0.06 R)
• M65: 27,885,641 km (0.07 R)
• M66: 28,206,379 km (0.048 R)
• M67: 28,592,940 km (0.084 R)
• M68: 29,959,666 km (0.106 R)
• M69: 30,354,006 km (0.099 R)
• M70: 30,816,264 km (0.064 R)
• M71: 32,959,104 km (0.06 R)
• M72: 34,185,357 km (0.084 R)
• M73: 35,634,662 km (0.057 R)
• M74: 37,386,153 km (0.09 R)
• M75: 37,810,712 km (0.096 R)
• M76: 38,307,976 km (0.043 R)
• M77: 38,521,751 km (0.12 R)
• M78: 39,452,698 km (0.071 R)
• M79: 39,596,612 km (0.09 R)
• M80: 41,702,501 km (0.075 R)
• M81: 42,584,530 km (0.109 R)
• M82: 45,041,525 km (0.098 R)
• M83: 45,643,956 km (0.057 R)
• M84: 45,719,503 km (0.093 R)
• M85: 45,946,293 km (0.117 R)
• M86: 47,238,370 km (0.108 R)
• M87: 47,314,665 km (0.108 R)
• M88: 49,005,270 km (0.074 R)
• M89: 49,082,613 km (0.031 R)
• M90: 51,028,582 km (0.094 R)
• M91: 51,106,971 km (0.054 R)
• M92: 51,420,827 km (0.119 R)
• M93: 52,208,310 km (0.058 R)

Planet 5 - Ice Giant

Semi-Major Axis: 8.61 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 472.2

Radius: 5.6

Gravity: 15.06 G

Time & Orbit

Eccentricity (e): 0.16

Orbit Range: 7.23 AU - 9.99 AU

Year: 17439 Days

Day: 16.9 Hours

Environment

Temp: -225 °C

Axial Tilt: 35.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 61,877,236 km

• M1: 75,098 km (0.101 R)
• M2: 256,112 km (0.105 R)
• M3: 734,226 km (0.093 R)
• M4: 1,863,840 km (0.058 R)
• M5: 2,124,739 km (0.091 R)
• M6: 2,842,958 km (0.075 R)
• M7: 3,383,305 km (0.039 R)
• M8: 4,402,665 km (0.099 R)
• M9: 4,478,960 km (0.068 R)
• M10: 5,509,390 km (0.072 R)
• M11: 6,263,812 km (0.042 R)
• M12: 6,392,766 km (0.093 R)
• M13: 6,609,533 km (0.097 R)
• M14: 6,784,712 km (0.111 R)
• M15: 6,961,387 km (0.061 R)
• M16: 7,319,375 km (0.115 R)
• M17: 7,409,732 km (0.092 R)
• M18: 7,867,502 km (0.114 R)
• M19: 8,006,628 km (0.089 R)
• M20: 9,540,455 km (0.063 R)
• M21: 10,037,868 km (0.106 R)
• M22: 10,188,812 km (0.104 R)
• M23: 10,851,381 km (0.085 R)
• M24: 11,685,987 km (0.101 R)
• M25: 12,649,248 km (0.114 R)
• M26: 12,703,402 km (0.11 R)
• M27: 13,305,384 km (0.118 R)
• M28: 13,360,586 km (0.089 R)
• M29: 13,916,641 km (0.062 R)
• M30: 14,028,840 km (0.091 R)
• M31: 14,084,939 km (0.108 R)
• M32: 14,310,383 km (0.079 R)
• M33: 14,879,303 km (0.117 R)
• M34: 15,166,382 km (0.118 R)
• M35: 16,274,304 km (0.11 R)
• M36: 16,451,727 km (0.096 R)
• M37: 16,510,967 km (0.052 R)
• M38: 18,505,556 km (0.049 R)
• M39: 19,688,127 km (0.118 R)
• M40: 19,813,939 km (0.051 R)
• M41: 20,256,748 km (0.072 R)
• M42: 20,638,821 km (0.108 R)
• M43: 22,387,471 km (0.109 R)
• M44: 22,782,409 km (0.093 R)
• M45: 23,579,317 km (0.105 R)
• M46: 23,713,058 km (0.115 R)
• M47: 24,115,626 km (0.098 R)
• M48: 24,317,882 km (0.083 R)
• M49: 25,268,726 km (0.092 R)
• M50: 25,886,266 km (0.104 R)
• M51: 26,300,802 km (0.069 R)
• M52: 27,136,455 km (0.07 R)
• M53: 29,551,115 km (0.114 R)
• M54: 29,839,689 km (0.105 R)
• M55: 29,984,200 km (0.096 R)
• M56: 30,056,606 km (0.118 R)
• M57: 31,003,261 km (0.057 R)
• M58: 31,443,378 km (0.078 R)
• M59: 31,737,936 km (0.101 R)
• M60: 31,959,491 km (0.108 R)
• M61: 33,750,177 km (0.115 R)
• M62: 33,900,972 km (0.098 R)
• M63: 33,976,369 km (0.118 R)
• M64: 34,051,916 km (0.103 R)
• M65: 34,962,070 km (0.106 R)
• M66: 35,343,694 km (0.084 R)
• M67: 36,651,478 km (0.111 R)
• M68: 36,883,953 km (0.072 R)
• M69: 37,116,877 km (0.086 R)
• M70: 37,272,309 km (0.1 R)
• M71: 39,949,663 km (0.095 R)
• M72: 40,029,398 km (0.045 R)
• M73: 40,109,134 km (0.103 R)
• M74: 41,714,917 km (0.094 R)
• M75: 42,200,662 km (0.106 R)
• M76: 43,177,985 km (0.104 R)
• M77: 43,587,284 km (0.079 R)
• M78: 43,997,931 km (0.086 R)
• M79: 44,905,990 km (0.069 R)
• M80: 47,160,729 km (0.077 R)
• M81: 47,582,296 km (0.054 R)
• M82: 49,452,119 km (0.088 R)
• M83: 49,708,979 km (0.115 R)
• M84: 50,740,606 km (0.088 R)
• M85: 51,866,330 km (0.089 R)
• M86: 52,040,312 km (0.119 R)
• M87: 52,301,510 km (0.048 R)
• M88: 52,388,726 km (0.118 R)
• M89: 54,142,312 km (0.051 R)
• M90: 55,292,420 km (0.098 R)
• M91: 55,736,875 km (0.114 R)
• M92: 57,167,330 km (0.103 R)
• M93: 58,519,246 km (0.059 R)
• M94: 59,335,452 km (0.099 R)
• M95: 60,887,381 km (0.104 R)

Planet 6 - Ice Giant

Semi-Major Axis: 10.57 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 261.9

Radius: 7

Gravity: 5.34 G

Time & Orbit

Eccentricity (e): 0.108

Orbit Range: 9.43 AU - 11.71 AU

Year: 23720 Days

Day: 22 Hours

Environment

Temp: -231 °C

Axial Tilt: 8.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 61,877,236 km

• M1: 115,789 km (0.1 R)
• M2: 189,391 km (0.109 R)
• M3: 346,169 km (0.107 R)
• M4: 509,082 km (0.102 R)
• M5: 562,937 km (0.096 R)
• M6: 777,909 km (0.086 R)
• M7: 884,123 km (0.049 R)
• M8: 2,189,365 km (0.096 R)
• M9: 2,883,649 km (0.084 R)
• M10: 3,534,100 km (0.086 R)
• M11: 3,605,159 km (0.072 R)
• M12: 3,857,680 km (0.04 R)
• M13: 3,967,635 km (0.099 R)
• M14: 4,494,818 km (0.085 R)
• M15: 4,963,957 km (0.104 R)
• M16: 6,204,123 km (0.099 R)
• M17: 6,376,310 km (0.092 R)
• M18: 6,947,325 km (0.113 R)
• M19: 7,996,904 km (0.096 R)
• M20: 8,755,963 km (0.061 R)
• M21: 9,438,878 km (0.088 R)
• M22: 9,736,877 km (0.1 R)
• M23: 10,700,586 km (0.09 R)
• M24: 11,907,243 km (0.089 R)
• M25: 12,337,037 km (0.111 R)
• M26: 12,881,573 km (0.066 R)
• M27: 13,156,684 km (0.116 R)
• M28: 13,267,237 km (0.043 R)
• M29: 13,378,089 km (0.092 R)
• M30: 13,768,838 km (0.093 R)
• M31: 13,824,938 km (0.038 R)
• M32: 14,790,442 km (0.081 R)
• M33: 15,252,251 km (0.083 R)
• M34: 16,725,940 km (0.1 R)
• M35: 17,207,046 km (0.048 R)
• M36: 18,121,388 km (0.098 R)
• M37: 18,615,361 km (0.118 R)
• M38: 18,677,444 km (0.077 R)
• M39: 19,302,015 km (0.116 R)
• M40: 20,828,512 km (0.104 R)
• M41: 21,151,493 km (0.102 R)
• M42: 21,345,971 km (0.103 R)
• M43: 22,790,637 km (0.094 R)
• M44: 23,793,691 km (0.041 R)
• M45: 25,704,205 km (0.113 R)
• M46: 25,911,847 km (0.094 R)
• M47: 26,120,087 km (0.103 R)
• M48: 26,677,938 km (0.059 R)
• M49: 27,451,359 km (0.085 R)
• M50: 27,663,489 km (0.049 R)
• M51: 29,815,454 km (0.042 R)
• M52: 30,325,284 km (0.075 R)
• M53: 30,838,105 km (0.062 R)
• M54: 31,205,966 km (0.103 R)
• M55: 31,353,619 km (0.106 R)
• M56: 31,797,775 km (0.058 R)
• M57: 32,244,026 km (0.115 R)
• M58: 32,467,974 km (0.06 R)
• M59: 33,067,562 km (0.086 R)
• M60: 33,142,810 km (0.094 R)
• M61: 33,218,058 km (0.034 R)
• M62: 33,670,890 km (0.074 R)
• M63: 34,582,689 km (0.103 R)
• M64: 35,118,250 km (0.085 R)
• M65: 35,502,567 km (0.113 R)
• M66: 36,120,256 km (0.05 R)
• M67: 36,819,327 km (0.116 R)
• M68: 38,310,070 km (0.062 R)
• M69: 39,660,340 km (0.046 R)
• M70: 40,060,515 km (0.033 R)
• M71: 41,999,752 km (0.11 R)
• M72: 42,325,875 km (0.09 R)
• M73: 43,062,794 km (0.057 R)
• M74: 43,556,467 km (0.103 R)
• M75: 43,721,474 km (0.1 R)
• M76: 44,549,498 km (0.07 R)
• M77: 45,132,032 km (0.115 R)
• M78: 46,473,327 km (0.111 R)
• M79: 46,726,297 km (0.055 R)
• M80: 47,233,583 km (0.076 R)
• M81: 47,912,757 km (0.067 R)
• M82: 47,997,878 km (0.071 R)
• M83: 48,083,000 km (0.042 R)
• M84: 49,538,587 km (0.03 R)
• M85: 52,493,145 km (0.073 R)
• M86: 54,257,502 km (0.07 R)
• M87: 54,612,797 km (0.118 R)
• M88: 56,220,825 km (0.086 R)
• M89: 57,934,917 km (0.116 R)
• M90: 60,308,287 km (0.12 R)
• M91: 61,137,209 km (0.052 R)

Kuiper Belt

Range: 30 - 58 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 189 - 12,355 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit