🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.72 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.44

Radius: 0.72

Gravity: 0.85 G

Time & Orbit

Eccentricity (e): 0.163

Orbit Range: 0.6 AU - 0.84 AU

Year: 234 Days

Day: 26.6 Hours

Environment

Temp: 124 °C

Axial Tilt: 14.5 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.16 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1

Radius: 1

Gravity: 1 G

Time & Orbit

Eccentricity (e): 0.23

Orbit Range: 0.89 AU - 1.43 AU

Year: 478 Days

Day: 30.7 Hours

Environment

Temp: -5 °C

Axial Tilt: 4.4 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 3 - Terrestrial

Semi-Major Axis: 2.21 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.8

Radius: 1.27

Gravity: 1.12 G

Time & Orbit

Eccentricity (e): 0.201

Orbit Range: 1.77 AU - 2.65 AU

Year: 1258 Days

Day: 39.6 Hours

Environment

Temp: -86 °C

Axial Tilt: 12.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 2.63 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.26

Radius: 0.58

Gravity: 0.77 G

Time & Orbit

Eccentricity (e): 0.018

Orbit Range: 2.58 AU - 2.68 AU

Year: 1633 Days

Day: 43 Hours

Environment

Temp: -109 °C

Axial Tilt: 7.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 3.83 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.06

Radius: 1.34

Gravity: 1.15 G

Time & Orbit

Eccentricity (e): 0.079

Orbit Range: 3.53 AU - 4.13 AU

Year: 2870 Days

Day: 27.6 Hours

Environment

Temp: -141 °C

Axial Tilt: 35.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 4.26 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 51.9

Radius: 12.3

Gravity: 0.34 G

Time & Orbit

Eccentricity (e): 0.094

Orbit Range: 3.86 AU - 4.66 AU

Year: 3367 Days

Day: 5.7 Hours

Environment

Temp: -148 °C

Axial Tilt: 42.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (40)

Outer Limit: 82,046,252 km

• M1: 176,226 km (0.074 R)
• M2: 529,726 km (0.07 R)
• M3: 725,550 km (0.113 R)
• M4: 824,284 km (0.107 R)
• M5: 903,272 km (0.096 R)
• M6: 1,211,892 km (0.093 R)
• M7: 1,546,393 km (0.117 R)
• M8: 1,630,916 km (0.118 R)
• M9: 1,724,863 km (0.118 R)
• M10: 1,869,375 km (0.071 R)
• M11: 2,634,119 km (0.119 R)
• M12: 2,782,969 km (0.087 R)
• M13: 3,197,056 km (0.077 R)
• M14: 3,507,920 km (0.119 R)
• M15: 3,651,534 km (0.077 R)
• M16: 3,849,602 km (0.093 R)
• M17: 4,223,896 km (0.103 R)
• M18: 4,322,182 km (0.052 R)
• M19: 4,824,531 km (0.104 R)
• M20: 4,904,417 km (0.092 R)
• M21: 5,065,533 km (0.086 R)
• M22: 5,631,013 km (0.119 R)
• M23: 5,872,764 km (0.078 R)
• M24: 6,007,102 km (0.082 R)
• M25: 6,167,322 km (0.109 R)
• M26: 6,580,212 km (0.105 R)
• M27: 6,770,949 km (0.089 R)
• M28: 6,976,347 km (0.119 R)
• M29: 7,314,737 km (0.097 R)
• M30: 7,778,640 km (0.108 R)
• M31: 7,886,052 km (0.072 R)
• M32: 8,197,664 km (0.054 R)
• M33: 8,334,397 km (0.119 R)
• M34: 8,444,351 km (0.032 R)
• M35: 8,540,842 km (0.045 R)
• M36: 8,693,431 km (0.086 R)
• M37: 8,888,956 km (0.032 R)
• M38: 9,001,304 km (0.11 R)
• M39: 9,412,548 km (0.116 R)
• M40: 9,801,054 km (0.058 R)

Planet 7 - Gas Giant

Semi-Major Axis: 9.18 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 489.4

Radius: 9.2

Gravity: 5.78 G

Time & Orbit

Eccentricity (e): 0.085

Orbit Range: 8.4 AU - 9.96 AU

Year: 10650 Days

Day: 9.4 Hours

Environment

Temp: -179 °C

Axial Tilt: 13.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (87)

Outer Limit: 82,046,252 km

• M1: 159,023 km (0.097 R)
• M2: 250,128 km (0.069 R)
• M3: 444,605 km (0.069 R)
• M4: 583,132 km (0.029 R)
• M5: 705,055 km (0.078 R)
• M6: 802,443 km (0.031 R)
• M7: 975,528 km (0.089 R)
• M8: 1,123,031 km (0.087 R)
• M9: 1,199,625 km (0.07 R)
• M10: 1,440,179 km (0.083 R)
• M11: 1,630,916 km (0.105 R)
• M12: 1,852,620 km (0.118 R)
• M13: 2,084,198 km (0.117 R)
• M14: 2,325,349 km (0.073 R)
• M15: 2,652,221 km (0.119 R)
• M16: 2,913,718 km (0.101 R)
• M17: 3,211,118 km (0.106 R)
• M18: 3,661,109 km (0.095 R)
• M19: 3,718,853 km (0.098 R)
• M20: 3,982,146 km (0.086 R)
• M21: 4,557,948 km (0.066 R)
• M22: 4,682,413 km (0.056 R)
• M23: 5,159,780 km (0.109 R)
• M24: 5,853,914 km (0.115 R)
• M25: 5,989,600 km (0.053 R)
• M26: 6,298,370 km (0.113 R)
• M27: 6,507,208 km (0.047 R)
• M28: 7,183,540 km (0.12 R)
• M29: 7,401,803 km (0.11 R)
• M30: 7,696,212 km (0.117 R)
• M31: 7,807,662 km (0.094 R)
• M32: 7,957,111 km (0.102 R)
• M33: 8,107,307 km (0.087 R)
• M34: 8,372,694 km (0.072 R)
• M35: 8,756,861 km (0.052 R)
• M36: 9,422,871 km (0.109 R)
• M37: 9,621,985 km (0.06 R)
• M38: 10,227,408 km (0.087 R)
• M39: 10,350,078 km (0.049 R)
• M40: 10,637,905 km (0.102 R)
• M41: 10,720,782 km (0.1 R)
• M42: 10,803,659 km (0.069 R)
• M43: 11,306,009 km (0.079 R)
• M44: 11,901,707 km (0.078 R)
• M45: 12,902,368 km (0.094 R)
• M46: 13,794,420 km (0.079 R)
• M47: 14,065,790 km (0.078 R)
• M48: 14,247,851 km (0.115 R)
• M49: 15,356,072 km (0.105 R)
• M50: 15,590,342 km (0.099 R)
• M51: 15,873,232 km (0.102 R)
• M52: 17,021,246 km (0.077 R)
• M53: 18,047,786 km (0.033 R)
• M54: 19,650,129 km (0.081 R)
• M55: 20,109,095 km (0.098 R)
• M56: 21,141,321 km (0.073 R)
• M57: 21,611,507 km (0.099 R)
• M58: 24,067,904 km (0.06 R)
• M59: 25,163,259 km (0.087 R)
• M60: 25,273,663 km (0.119 R)
• M61: 25,883,872 km (0.098 R)
• M62: 26,162,872 km (0.104 R)
• M63: 26,780,263 km (0.111 R)
• M64: 27,402,291 km (0.116 R)
• M65: 28,833,793 km (0.107 R)
• M66: 29,238,904 km (0.107 R)
• M67: 29,296,948 km (0.103 R)
• M68: 30,524,698 km (0.085 R)
• M69: 31,055,920 km (0.108 R)
• M70: 31,530,743 km (0.094 R)
• M71: 32,307,306 km (0.082 R)
• M72: 33,818,543 km (0.083 R)
• M73: 34,613,507 km (0.097 R)
• M74: 35,414,603 km (0.076 R)
• M75: 36,097,218 km (0.055 R)
• M76: 37,475,463 km (0.054 R)
• M77: 38,552,269 km (0.089 R)
• M78: 39,254,481 km (0.082 R)
• M79: 40,154,163 km (0.107 R)
• M80: 41,321,026 km (0.096 R)
• M81: 41,451,326 km (0.113 R)
• M82: 42,170,593 km (0.097 R)
• M83: 42,498,810 km (0.051 R)
• M84: 42,564,633 km (0.105 R)
• M85: 44,353,076 km (0.092 R)
• M86: 44,419,797 km (0.118 R)
• M87: 44,686,978 km (0.089 R)

Planet 8 - Gas Giant

Semi-Major Axis: 10.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 819.1

Radius: 14.7

Gravity: 3.79 G

Time & Orbit

Eccentricity (e): 0.174

Orbit Range: 8.28 AU - 11.76 AU

Year: 12144 Days

Day: 9.5 Hours

Environment

Temp: -184 °C

Axial Tilt: 32.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 82,046,252 km

• M1: 188,045 km (0.076 R)
• M2: 288,873 km (0.104 R)
• M3: 424,858 km (0.09 R)
• M4: 697,575 km (0.078 R)
• M5: 947,852 km (0.105 R)
• M6: 2,795,535 km (0.108 R)
• M7: 3,271,855 km (0.101 R)
• M8: 3,403,352 km (0.089 R)
• M9: 3,739,797 km (0.117 R)
• M10: 3,877,427 km (0.039 R)
• M11: 3,981,847 km (0.079 R)
• M12: 4,300,789 km (0.091 R)
• M13: 4,481,653 km (0.117 R)
• M14: 4,665,060 km (0.073 R)
• M15: 5,115,649 km (0.094 R)
• M16: 5,384,925 km (0.086 R)
• M17: 5,541,105 km (0.115 R)
• M18: 5,659,138 km (0.12 R)
• M19: 6,018,322 km (0.108 R)
• M20: 6,385,136 km (0.082 R)
• M21: 6,843,355 km (0.092 R)
• M22: 6,970,214 km (0.039 R)
• M23: 7,183,540 km (0.119 R)
• M24: 7,355,578 km (0.063 R)
• M25: 7,616,476 km (0.096 R)
• M26: 7,791,955 km (0.045 R)
• M27: 8,735,917 km (0.051 R)
• M28: 9,012,374 km (0.076 R)
• M29: 9,244,849 km (0.074 R)
• M30: 9,906,670 km (0.103 R)
• M31: 10,050,583 km (0.093 R)
• M32: 10,340,205 km (0.105 R)
• M33: 10,780,023 km (0.085 R)
• M34: 10,977,492 km (0.116 R)
• M35: 11,376,020 km (0.052 R)
• M36: 12,136,277 km (0.068 R)
• M37: 12,496,658 km (0.082 R)
• M38: 12,600,180 km (0.099 R)
• M39: 13,070,067 km (0.079 R)
• M40: 13,492,681 km (0.101 R)
• M41: 14,296,919 km (0.081 R)
• M42: 14,459,681 km (0.115 R)
• M43: 14,841,904 km (0.074 R)
• M44: 15,227,418 km (0.112 R)
• M45: 16,120,966 km (0.041 R)
• M46: 16,233,912 km (0.093 R)
• M47: 16,802,384 km (0.082 R)
• M48: 17,609,315 km (0.117 R)
• M49: 18,665,177 km (0.102 R)
• M50: 19,021,818 km (0.072 R)
• M51: 19,320,715 km (0.077 R)
• M52: 19,862,558 km (0.099 R)
• M53: 21,146,407 km (0.093 R)
• M54: 21,892,152 km (0.096 R)
• M55: 22,899,844 km (0.119 R)
• M56: 23,922,644 km (0.034 R)
• M57: 26,145,369 km (0.098 R)
• M58: 27,483,522 km (0.078 R)
• M59: 27,821,464 km (0.093 R)
• M60: 28,706,784 km (0.044 R)
• M61: 28,843,816 km (0.032 R)
• M62: 30,295,663 km (0.089 R)
• M63: 30,644,825 km (0.116 R)
• M64: 31,913,115 km (0.096 R)
• M65: 32,268,410 km (0.075 R)
• M66: 32,553,544 km (0.038 R)
• M67: 33,847,416 km (0.094 R)
• M68: 35,304,649 km (0.041 R)
• M69: 35,598,459 km (0.108 R)
• M70: 37,229,524 km (0.1 R)
• M71: 38,884,825 km (0.088 R)
• M72: 41,026,019 km (0.098 R)
• M73: 41,644,906 km (0.092 R)
• M74: 42,970,193 km (0.102 R)
• M75: 43,598,654 km (0.037 R)
• M76: 44,150,969 km (0.09 R)
• M77: 46,062,531 km (0.067 R)
• M78: 46,705,652 km (0.109 R)
• M79: 48,163,633 km (0.072 R)
• M80: 48,408,225 km (0.039 R)
• M81: 49,801,131 km (0.118 R)
• M82: 51,124,324 km (0.112 R)
• M83: 52,291,487 km (0.107 R)
• M84: 52,626,586 km (0.037 R)
• M85: 53,214,805 km (0.085 R)

Planet 9 - Ice Giant

Semi-Major Axis: 13.96 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 536.8

Radius: 7.9

Gravity: 8.6 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 10.87 AU - 17.05 AU

Year: 19971 Days

Day: 22.5 Hours

Environment

Temp: -198 °C

Axial Tilt: 20.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 82,046,252 km

• M1: 148,251 km (0.107 R)
• M2: 201,957 km (0.099 R)
• M3: 281,543 km (0.112 R)
• M4: 537,056 km (0.09 R)
• M5: 658,081 km (0.102 R)
• M6: 904,319 km (0.056 R)
• M7: 1,000,959 km (0.113 R)
• M8: 3,080,370 km (0.074 R)
• M9: 3,569,555 km (0.084 R)
• M10: 3,647,046 km (0.059 R)
• M11: 3,843,020 km (0.116 R)
• M12: 3,922,456 km (0.057 R)
• M13: 4,451,883 km (0.096 R)
• M14: 4,619,283 km (0.092 R)
• M15: 4,874,347 km (0.061 R)
• M16: 5,177,732 km (0.034 R)
• M17: 5,712,095 km (0.031 R)
• M18: 6,737,140 km (0.111 R)
• M19: 7,868,100 km (0.119 R)
• M20: 8,275,305 km (0.102 R)
• M21: 8,481,302 km (0.046 R)
• M22: 8,898,680 km (0.072 R)
• M23: 9,753,482 km (0.064 R)
• M24: 10,522,714 km (0.044 R)
• M25: 10,690,114 km (0.063 R)
• M26: 13,004,842 km (0.108 R)
• M27: 13,425,511 km (0.075 R)
• M28: 13,911,555 km (0.081 R)
• M29: 14,341,499 km (0.054 R)
• M30: 15,594,232 km (0.105 R)
• M31: 16,104,959 km (0.096 R)
• M32: 16,686,296 km (0.102 R)
• M33: 17,143,168 km (0.11 R)
• M34: 17,208,692 km (0.111 R)
• M35: 17,802,895 km (0.12 R)
• M36: 17,869,316 km (0.114 R)
• M37: 18,605,487 km (0.096 R)
• M38: 18,672,956 km (0.114 R)
• M39: 18,740,424 km (0.074 R)
• M40: 18,943,429 km (0.067 R)
• M41: 19,011,346 km (0.042 R)
• M42: 19,079,114 km (0.084 R)
• M43: 20,384,804 km (0.115 R)
• M44: 21,932,245 km (0.091 R)
• M45: 22,360,843 km (0.072 R)
• M46: 24,766,975 km (0.112 R)
• M47: 24,841,175 km (0.087 R)
• M48: 25,287,874 km (0.042 R)
• M49: 26,492,137 km (0.091 R)
• M50: 26,872,266 km (0.07 R)
• M51: 27,714,801 km (0.072 R)
• M52: 31,813,932 km (0.092 R)
• M53: 32,705,086 km (0.102 R)
• M54: 32,786,468 km (0.035 R)
• M55: 33,194,571 km (0.098 R)
• M56: 33,440,210 km (0.077 R)
• M57: 34,428,903 km (0.07 R)
• M58: 35,343,694 km (0.108 R)
• M59: 35,845,894 km (0.066 R)
• M60: 36,857,624 km (0.041 R)
• M61: 39,254,481 km (0.101 R)
• M62: 40,821,818 km (0.084 R)
• M63: 41,172,924 km (0.03 R)
• M64: 41,260,738 km (0.061 R)
• M65: 41,436,815 km (0.042 R)
• M66: 41,966,391 km (0.089 R)
• M67: 42,054,953 km (0.09 R)
• M68: 42,587,073 km (0.087 R)
• M69: 46,283,188 km (0.11 R)
• M70: 47,384,228 km (0.056 R)
• M71: 48,030,491 km (0.078 R)
• M72: 48,215,693 km (0.119 R)
• M73: 48,586,845 km (0.115 R)
• M74: 49,893,134 km (0.082 R)
• M75: 51,400,033 km (0.115 R)
• M76: 51,684,269 km (0.057 R)
• M77: 52,349,531 km (0.085 R)
• M78: 54,073,048 km (0.111 R)
• M79: 55,038,553 km (0.066 R)
• M80: 56,986,616 km (0.079 R)
• M81: 58,067,760 km (0.114 R)
• M82: 58,166,345 km (0.061 R)
• M83: 59,254,819 km (0.118 R)
• M84: 59,354,152 km (0.081 R)
• M85: 60,950,212 km (0.11 R)
• M86: 63,167,701 km (0.036 R)
• M87: 63,370,556 km (0.071 R)
• M88: 63,472,133 km (0.091 R)
• M89: 66,543,227 km (0.113 R)
• M90: 68,825,941 km (0.026 R)
• M91: 69,557,624 km (0.12 R)

Planet 10 - Ice Giant

Semi-Major Axis: 14.69 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 739.2

Radius: 3.6

Gravity: 57.04 G

Time & Orbit

Eccentricity (e): 0.023

Orbit Range: 14.35 AU - 15.03 AU

Year: 21558 Days

Day: 24.3 Hours

Environment

Temp: -190 °C

Axial Tilt: 47.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 82,046,252 km

• M1: 73,752 km (0.117 R)
• M2: 242,797 km (0.097 R)
• M3: 470,934 km (0.102 R)
• M4: 581,637 km (0.087 R)
• M5: 907,161 km (0.1 R)
• M6: 1,190,201 km (0.119 R)
• M7: 1,762,861 km (0.065 R)
• M8: 1,831,078 km (0.117 R)
• M9: 2,076,867 km (0.047 R)
• M10: 2,755,443 km (0.07 R)
• M11: 2,995,697 km (0.08 R)
• M12: 3,242,683 km (0.082 R)
• M13: 3,368,645 km (0.059 R)
• M14: 3,668,738 km (0.097 R)
• M15: 3,844,067 km (0.097 R)
• M16: 8,105,811 km (0.088 R)
• M17: 8,796,504 km (0.12 R)
• M18: 10,603,946 km (0.09 R)
• M19: 10,728,411 km (0.107 R)
• M20: 11,358,069 km (0.093 R)
• M21: 11,677,311 km (0.053 R)
• M22: 11,741,488 km (0.105 R)
• M23: 14,061,601 km (0.12 R)
• M24: 14,129,818 km (0.104 R)
• M25: 14,958,291 km (0.088 R)
• M26: 19,102,003 km (0.092 R)
• M27: 19,633,823 km (0.089 R)
• M28: 19,710,118 km (0.119 R)
• M29: 20,093,537 km (0.098 R)
• M30: 20,170,431 km (0.075 R)
• M31: 20,247,473 km (0.082 R)
• M32: 20,634,334 km (0.112 R)
• M33: 21,809,126 km (0.114 R)
• M34: 21,888,263 km (0.11 R)
• M35: 22,046,687 km (0.114 R)
• M36: 22,844,792 km (0.098 R)
• M37: 23,409,075 km (0.084 R)
• M38: 24,469,125 km (0.096 R)
• M39: 24,633,683 km (0.077 R)
• M40: 25,295,205 km (0.048 R)
• M41: 26,214,334 km (0.063 R)
• M42: 28,602,814 km (0.077 R)
• M43: 29,910,748 km (0.028 R)
• M44: 30,439,427 km (0.065 R)
• M45: 31,148,969 km (0.044 R)
• M46: 32,765,374 km (0.097 R)
• M47: 32,946,537 km (0.049 R)
• M48: 34,132,998 km (0.106 R)
• M49: 37,395,877 km (0.118 R)
• M50: 37,680,263 km (0.073 R)
• M51: 38,060,391 km (0.054 R)
• M52: 38,346,273 km (0.11 R)
• M53: 39,690,110 km (0.115 R)
• M54: 39,883,391 km (0.111 R)
• M55: 41,049,357 km (0.062 R)
• M56: 41,244,731 km (0.11 R)
• M57: 41,440,555 km (0.093 R)
• M58: 41,538,542 km (0.077 R)
• M59: 41,734,664 km (0.107 R)
• M60: 45,621,367 km (0.095 R)
• M61: 46,229,482 km (0.095 R)
• M62: 47,351,316 km (0.068 R)
• M63: 47,453,791 km (0.076 R)
• M64: 47,658,890 km (0.086 R)
• M65: 48,172,908 km (0.106 R)
• M66: 49,517,793 km (0.117 R)
• M67: 52,562,409 km (0.092 R)
• M68: 54,697,021 km (0.102 R)
• M69: 57,405,041 km (0.112 R)
• M70: 60,156,296 km (0.12 R)
• M71: 61,380,306 km (0.071 R)
• M72: 61,492,055 km (0.119 R)
• M73: 64,419,536 km (0.09 R)
• M74: 65,329,540 km (0.095 R)
• M75: 66,472,767 km (0.082 R)
• M76: 67,853,555 km (0.046 R)
• M77: 69,476,243 km (0.071 R)
• M78: 70,877,227 km (0.095 R)
• M79: 71,816,552 km (0.096 R)
• M80: 74,420,453 km (0.073 R)
• M81: 74,897,221 km (0.117 R)
• M82: 75,614,244 km (0.108 R)
• M83: 75,853,750 km (0.097 R)
• M84: 76,333,660 km (0.101 R)
• M85: 78,384,048 km (0.099 R)
• M86: 78,990,518 km (0.12 R)
• M87: 79,111,992 km (0.03 R)
• M88: 79,598,484 km (0.084 R)
• M89: 81,186,764 km (0.102 R)

Kuiper Belt

Range: 30 - 45 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 407 - 12,373 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit