🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.57 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.08

Radius: 1.34

Gravity: 1.16 G

Time & Orbit

Eccentricity (e): 0.095

Orbit Range: 0.52 AU - 0.62 AU

Year: 151 Days

Day: 47.8 Hours

Environment

Temp: 248 °C

Axial Tilt: 12.7 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.86 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.28

Radius: 0.6

Gravity: 0.78 G

Time & Orbit

Eccentricity (e): 0.162

Orbit Range: 0.72 AU - 1 AU

Year: 279 Days

Day: 38.1 Hours

Environment

Temp: 139 °C

Axial Tilt: 33.1 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 3 - Terrestrial

Semi-Major Axis: 1.17 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.31

Radius: 1.79

Gravity: 1.35 G

Time & Orbit

Eccentricity (e): 0.102

Orbit Range: 1.05 AU - 1.29 AU

Year: 443 Days

Day: 24.9 Hours

Environment

Temp: 21 °C

Axial Tilt: 3.4 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (1)

Outer Limit: 61,785,722 km

• M1: 377,435 km (0.036 R)

Planet 4 - Terrestrial

Semi-Major Axis: 1.18 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.24

Radius: 0.57

Gravity: 0.74 G

Time & Orbit

Eccentricity (e): 0.065

Orbit Range: 1.1 AU - 1.26 AU

Year: 448 Days

Day: 44.2 Hours

Environment

Temp: 22 °C

Axial Tilt: 32.5 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 5 - Terrestrial

Semi-Major Axis: 1.3 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.09

Radius: 1.57

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.011

Orbit Range: 1.29 AU - 1.31 AU

Year: 519 Days

Day: 45.6 Hours

Environment

Temp: 12 °C

Axial Tilt: 37.1 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Asteroid Belt

Center: 4.72 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 6 - Gas Giant

Semi-Major Axis: 8.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 493.1

Radius: 13.4

Gravity: 2.75 G

Time & Orbit

Eccentricity (e): 0.167

Orbit Range: 6.77 AU - 9.49 AU

Year: 8110 Days

Day: 13.1 Hours

Environment

Temp: -153 °C

Axial Tilt: 6.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (60)

Outer Limit: 61,785,722 km

• M1: 169,943 km (0.119 R)
• M2: 256,411 km (0.12 R)
• M3: 498,311 km (0.097 R)
• M4: 659,577 km (0.11 R)
• M5: 840,740 km (0.118 R)
• M6: 976,874 km (0.097 R)
• M7: 1,104,631 km (0.113 R)
• M8: 1,272,928 km (0.102 R)
• M9: 1,542,055 km (0.117 R)
• M10: 1,732,044 km (0.072 R)
• M11: 2,011,493 km (0.093 R)
• M12: 2,436,201 km (0.062 R)
• M13: 2,866,146 km (0.057 R)
• M14: 3,246,872 km (0.101 R)
• M15: 3,900,316 km (0.114 R)
• M16: 4,403,563 km (0.114 R)
• M17: 4,704,554 km (0.083 R)
• M18: 5,530,184 km (0.119 R)
• M19: 5,706,560 km (0.11 R)
• M20: 6,125,734 km (0.105 R)
• M21: 6,741,927 km (0.096 R)
• M22: 7,378,017 km (0.083 R)
• M23: 7,933,773 km (0.1 R)
• M24: 9,155,390 km (0.09 R)
• M25: 9,469,844 km (0.097 R)
• M26: 9,859,248 km (0.036 R)
• M27: 10,253,887 km (0.04 R)
• M28: 10,507,605 km (0.095 R)
• M29: 10,726,915 km (0.043 R)
• M30: 11,543,720 km (0.083 R)
• M31: 15,007,060 km (0.092 R)
• M32: 15,171,767 km (0.044 R)
• M33: 15,836,131 km (0.115 R)
• M34: 15,961,644 km (0.099 R)
• M35: 17,107,265 km (0.105 R)
• M36: 17,929,454 km (0.106 R)
• M37: 18,587,535 km (0.115 R)
• M38: 19,567,102 km (0.098 R)
• M39: 21,948,551 km (0.034 R)
• M40: 22,983,469 km (0.105 R)
• M41: 23,316,025 km (0.084 R)
• M42: 24,275,246 km (0.089 R)
• M43: 25,198,415 km (0.071 R)
• M44: 25,394,089 km (0.116 R)
• M45: 25,984,701 km (0.058 R)
• M46: 26,083,436 km (0.12 R)
• M47: 27,530,945 km (0.082 R)
• M48: 27,934,859 km (0.108 R)
• M49: 29,570,114 km (0.103 R)
• M50: 30,451,395 km (0.068 R)
• M51: 30,973,790 km (0.092 R)
• M52: 31,183,527 km (0.062 R)
• M53: 31,763,069 km (0.105 R)
• M54: 32,080,515 km (0.043 R)
• M55: 32,452,416 km (0.116 R)
• M56: 32,612,186 km (0.063 R)
• M57: 33,307,667 km (0.095 R)
• M58: 34,495,623 km (0.119 R)
• M59: 35,532,785 km (0.105 R)
• M60: 36,802,123 km (0.115 R)

Planet 7 - Gas Giant

Semi-Major Axis: 11.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 677.8

Radius: 12.3

Gravity: 4.48 G

Time & Orbit

Eccentricity (e): 0.224

Orbit Range: 8.6 AU - 13.56 AU

Year: 12903 Days

Day: 7.5 Hours

Environment

Temp: -168 °C

Axial Tilt: 18.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (87)

Outer Limit: 61,785,722 km

• M1: 154,684 km (0.084 R)
• M2: 256,710 km (0.06 R)
• M3: 506,838 km (0.117 R)
• M4: 587,770 km (0.089 R)
• M5: 1,110,166 km (0.072 R)
• M6: 1,243,757 km (0.05 R)
• M7: 1,677,291 km (0.075 R)
• M8: 1,885,083 km (0.067 R)
• M9: 2,240,827 km (0.036 R)
• M10: 2,354,670 km (0.115 R)
• M11: 2,529,251 km (0.116 R)
• M12: 2,829,793 km (0.057 R)
• M13: 3,631,638 km (0.116 R)
• M14: 4,500,502 km (0.094 R)
• M15: 4,865,671 km (0.082 R)
• M16: 5,164,866 km (0.095 R)
• M17: 5,278,561 km (0.082 R)
• M18: 5,547,388 km (0.069 R)
• M19: 6,380,499 km (0.1 R)
• M20: 6,502,720 km (0.043 R)
• M21: 7,041,422 km (0.107 R)
• M22: 7,125,646 km (0.069 R)
• M23: 9,522,802 km (0.089 R)
• M24: 9,897,545 km (0.117 R)
• M25: 10,086,786 km (0.095 R)
• M26: 10,661,541 km (0.087 R)
• M27: 11,296,434 km (0.109 R)
• M28: 11,793,099 km (0.049 R)
• M29: 12,347,659 km (0.111 R)
• M30: 13,014,267 km (0.115 R)
• M31: 13,169,699 km (0.032 R)
• M32: 13,797,711 km (0.095 R)
• M33: 14,382,190 km (0.079 R)
• M34: 14,596,563 km (0.097 R)
• M35: 14,812,134 km (0.112 R)
• M36: 15,629,986 km (0.11 R)
• M37: 16,462,498 km (0.105 R)
• M38: 17,138,830 km (0.078 R)
• M39: 17,594,804 km (0.081 R)
• M40: 18,460,676 km (0.059 R)
• M41: 18,810,885 km (0.076 R)
• M42: 18,928,020 km (0.054 R)
• M43: 19,222,130 km (0.114 R)
• M44: 20,173,572 km (0.061 R)
• M45: 21,201,160 km (0.079 R)
• M46: 21,384,268 km (0.073 R)
• M47: 21,567,824 km (0.11 R)
• M48: 22,805,597 km (0.107 R)
• M49: 23,622,401 km (0.109 R)
• M50: 24,576,836 km (0.082 R)
• M51: 24,897,723 km (0.077 R)
• M52: 25,220,107 km (0.103 R)
• M53: 25,349,359 km (0.094 R)
• M54: 25,868,913 km (0.069 R)
• M55: 26,326,383 km (0.1 R)
• M56: 27,249,252 km (0.118 R)
• M57: 28,991,319 km (0.069 R)
• M58: 29,670,942 km (0.096 R)
• M59: 29,807,525 km (0.093 R)
• M60: 30,149,805 km (0.031 R)
• M61: 31,184,574 km (0.117 R)
• M62: 31,601,653 km (0.096 R)
• M63: 33,857,588 km (0.073 R)
• M64: 34,932,748 km (0.095 R)
• M65: 36,530,005 km (0.067 R)
• M66: 37,043,275 km (0.087 R)
• M67: 37,337,534 km (0.063 R)
• M68: 37,706,592 km (0.097 R)
• M69: 38,225,248 km (0.049 R)
• M70: 40,399,055 km (0.033 R)
• M71: 41,234,110 km (0.092 R)
• M72: 42,228,337 km (0.108 R)
• M73: 42,612,804 km (0.094 R)
• M74: 42,844,082 km (0.075 R)
• M75: 43,075,660 km (0.075 R)
• M76: 43,928,667 km (0.099 R)
• M77: 45,179,455 km (0.056 R)
• M78: 47,236,575 km (0.042 R)
• M79: 48,839,815 km (0.048 R)
• M80: 49,001,231 km (0.035 R)
• M81: 50,868,811 km (0.101 R)
• M82: 51,196,131 km (0.07 R)
• M83: 53,173,965 km (0.103 R)
• M84: 53,256,842 km (0.102 R)
• M85: 53,506,072 km (0.107 R)
• M86: 54,506,433 km (0.046 R)
• M87: 54,757,458 km (0.105 R)

Planet 8 - Ice Giant

Semi-Major Axis: 18.2 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 136.7

Radius: 8

Gravity: 2.14 G

Time & Orbit

Eccentricity (e): 0.093

Orbit Range: 16.51 AU - 19.89 AU

Year: 27163 Days

Day: 24.6 Hours

Environment

Temp: -199 °C

Axial Tilt: 13.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (61)

Outer Limit: 61,785,722 km

• M1: 368,310 km (0.112 R)
• M2: 801,545 km (0.116 R)
• M3: 1,064,688 km (0.082 R)
• M4: 1,129,314 km (0.086 R)
• M5: 1,377,647 km (0.107 R)
• M6: 1,472,342 km (0.063 R)
• M7: 2,709,965 km (0.071 R)
• M8: 3,230,117 km (0.086 R)
• M9: 3,583,168 km (0.119 R)
• M10: 4,395,634 km (0.066 R)
• M11: 4,786,683 km (0.113 R)
• M12: 5,188,802 km (0.102 R)
• M13: 5,412,750 km (0.099 R)
• M14: 6,579,614 km (0.116 R)
• M15: 6,660,097 km (0.104 R)
• M16: 7,149,881 km (0.093 R)
• M17: 7,651,482 km (0.091 R)
• M18: 8,468,586 km (0.054 R)
• M19: 8,644,214 km (0.09 R)
• M20: 8,820,889 km (0.058 R)
• M21: 10,045,347 km (0.102 R)
• M22: 10,371,321 km (0.09 R)
• M23: 12,053,400 km (0.117 R)
• M24: 13,973,339 km (0.101 R)
• M25: 14,025,100 km (0.109 R)
• M26: 14,180,831 km (0.049 R)
• M27: 15,127,636 km (0.047 R)
• M28: 15,340,813 km (0.086 R)
• M29: 15,932,173 km (0.064 R)
• M30: 16,094,637 km (0.094 R)
• M31: 17,526,587 km (0.103 R)
• M32: 18,541,609 km (0.108 R)
• M33: 19,633,524 km (0.082 R)
• M34: 19,982,685 km (0.05 R)
• M35: 21,340,136 km (0.115 R)
• M36: 21,579,194 km (0.084 R)
• M37: 22,727,058 km (0.104 R)
• M38: 23,216,393 km (0.102 R)
• M39: 24,516,997 km (0.102 R)
• M40: 24,893,086 km (0.112 R)
• M41: 24,955,917 km (0.044 R)
• M42: 28,690,328 km (0.116 R)
• M43: 29,285,279 km (0.071 R)
• M44: 31,501,422 km (0.086 R)
• M45: 31,773,690 km (0.12 R)
• M46: 36,092,581 km (0.055 R)
• M47: 36,163,640 km (0.027 R)
• M48: 37,524,531 km (0.057 R)
• M49: 37,740,850 km (0.04 R)
• M50: 38,756,171 km (0.047 R)
• M51: 39,267,347 km (0.097 R)
• M52: 39,707,164 km (0.111 R)
• M53: 41,184,892 km (0.049 R)
• M54: 43,057,409 km (0.109 R)
• M55: 45,571,251 km (0.066 R)
• M56: 47,819,259 km (0.09 R)
• M57: 51,218,571 km (0.055 R)
• M58: 51,378,641 km (0.026 R)
• M59: 52,422,684 km (0.116 R)
• M60: 52,503,317 km (0.105 R)
• M61: 53,149,580 km (0.11 R)

Planet 9 - Ice Giant

Semi-Major Axis: 18.48 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 534.3

Radius: 7.5

Gravity: 9.5 G

Time & Orbit

Eccentricity (e): 0.139

Orbit Range: 15.91 AU - 21.05 AU

Year: 27793 Days

Day: 18.4 Hours

Environment

Temp: -199 °C

Axial Tilt: 26.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 61,785,722 km

• M1: 167,699 km (0.106 R)
• M2: 222,452 km (0.112 R)
• M3: 568,771 km (0.032 R)
• M4: 870,211 km (0.113 R)
• M5: 1,991,297 km (0.084 R)
• M6: 2,445,776 km (0.066 R)
• M7: 2,684,833 km (0.109 R)
• M8: 3,402,903 km (0.056 R)
• M9: 3,580,176 km (0.117 R)
• M10: 3,760,442 km (0.11 R)
• M11: 4,130,098 km (0.101 R)
• M12: 4,804,784 km (0.069 R)
• M13: 4,953,784 km (0.098 R)
• M14: 5,669,460 km (0.102 R)
• M15: 6,691,662 km (0.107 R)
• M16: 7,423,346 km (0.086 R)
• M17: 7,480,642 km (0.069 R)
• M18: 8,418,022 km (0.074 R)
• M19: 8,658,126 km (0.07 R)
• M20: 9,829,328 km (0.077 R)
• M21: 10,145,877 km (0.115 R)
• M22: 10,529,895 km (0.07 R)
• M23: 12,795,255 km (0.04 R)
• M24: 13,419,378 km (0.114 R)
• M25: 13,489,240 km (0.062 R)
• M26: 13,559,401 km (0.112 R)
• M27: 13,699,874 km (0.114 R)
• M28: 14,053,374 km (0.064 R)
• M29: 15,204,380 km (0.085 R)
• M30: 15,423,540 km (0.102 R)
• M31: 16,161,656 km (0.076 R)
• M32: 16,835,744 km (0.075 R)
• M33: 17,902,676 km (0.084 R)
• M34: 17,979,719 km (0.118 R)
• M35: 18,288,938 km (0.109 R)
• M36: 19,385,191 km (0.112 R)
• M37: 19,941,247 km (0.101 R)
• M38: 20,663,954 km (0.116 R)
• M39: 22,549,485 km (0.08 R)
• M40: 24,233,209 km (0.1 R)
• M41: 24,832,050 km (0.053 R)
• M42: 25,522,444 km (0.08 R)
• M43: 25,783,043 km (0.075 R)
• M44: 26,131,756 km (0.037 R)
• M45: 26,219,121 km (0.109 R)
• M46: 26,394,300 km (0.116 R)
• M47: 28,167,035 km (0.102 R)
• M48: 31,546,451 km (0.105 R)
• M49: 32,200,194 km (0.092 R)
• M50: 32,669,781 km (0.041 R)
• M51: 32,858,275 km (0.092 R)
• M52: 33,615,838 km (0.119 R)
• M53: 35,922,787 km (0.08 R)
• M54: 36,997,199 km (0.069 R)
• M55: 40,081,159 km (0.1 R)
• M56: 41,195,214 km (0.06 R)
• M57: 45,646,649 km (0.077 R)
• M58: 45,857,432 km (0.078 R)
• M59: 47,341,593 km (0.047 R)
• M60: 48,196,694 km (0.117 R)
• M61: 51,120,285 km (0.068 R)
• M62: 53,101,111 km (0.101 R)
• M63: 53,211,963 km (0.111 R)
• M64: 54,435,524 km (0.117 R)
• M65: 54,770,922 km (0.114 R)
• M66: 55,556,012 km (0.071 R)
• M67: 55,668,509 km (0.079 R)
• M68: 57,478,195 km (0.094 R)
• M69: 57,933,571 km (0.101 R)
• M70: 58,619,028 km (0.032 R)
• M71: 58,848,062 km (0.053 R)
• M72: 59,422,069 km (0.112 R)
• M73: 59,652,151 km (0.115 R)
• M74: 60,228,701 km (0.115 R)
• M75: 60,575,469 km (0.114 R)
• M76: 60,922,985 km (0.108 R)
• M77: 62,787,423 km (0.088 R)
• M78: 65,381,450 km (0.06 R)
• M79: 66,333,341 km (0.101 R)
• M80: 72,263,251 km (0.119 R)
• M81: 74,731,916 km (0.115 R)
• M82: 75,104,564 km (0.117 R)
• M83: 75,477,810 km (0.116 R)
• M84: 76,476,227 km (0.064 R)
• M85: 77,604,793 km (0.115 R)
• M86: 78,738,745 km (0.049 R)
• M87: 81,023,104 km (0.091 R)
• M88: 81,278,318 km (0.049 R)
• M89: 83,586,913 km (0.116 R)
• M90: 84,361,082 km (0.095 R)
• M91: 84,490,334 km (0.098 R)
• M92: 86,046,900 km (0.101 R)
• M93: 86,177,050 km (0.096 R)
• M94: 87,089,747 km (0.083 R)

Planet 10 - Ice Giant

Semi-Major Axis: 18.69 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 183.6

Radius: 6.9

Gravity: 3.86 G

Time & Orbit

Eccentricity (e): 0.209

Orbit Range: 14.78 AU - 22.6 AU

Year: 28268 Days

Day: 22.1 Hours

Environment

Temp: -192 °C

Axial Tilt: 45.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 61,785,722 km

• M1: 455,675 km (0.07 R)
• M2: 714,479 km (0.118 R)
• M3: 1,204,113 km (0.107 R)
• M4: 1,534,575 km (0.094 R)
• M5: 2,523,417 km (0.028 R)
• M6: 3,924,102 km (0.117 R)
• M7: 4,108,855 km (0.105 R)
• M8: 4,221,203 km (0.102 R)
• M9: 4,372,447 km (0.059 R)
• M10: 4,487,039 km (0.043 R)
• M11: 5,398,838 km (0.073 R)
• M12: 5,854,662 km (0.055 R)
• M13: 6,279,670 km (0.03 R)
• M14: 6,409,222 km (0.059 R)
• M15: 7,613,933 km (0.103 R)
• M16: 7,937,513 km (0.085 R)
• M17: 8,077,537 km (0.089 R)
• M18: 8,550,416 km (0.056 R)
• M19: 8,838,392 km (0.091 R)
• M20: 9,080,890 km (0.103 R)
• M21: 9,129,659 km (0.114 R)
• M22: 9,671,652 km (0.039 R)
• M23: 9,721,468 km (0.077 R)
• M24: 9,821,250 km (0.114 R)
• M25: 10,838,515 km (0.116 R)
• M26: 10,890,276 km (0.102 R)
• M27: 12,210,178 km (0.056 R)
• M28: 12,426,048 km (0.106 R)
• M29: 12,588,810 km (0.112 R)
• M30: 15,577,925 km (0.09 R)
• M31: 15,636,269 km (0.085 R)
• M32: 18,093,713 km (0.096 R)
• M33: 18,278,167 km (0.113 R)
• M34: 18,525,153 km (0.085 R)
• M35: 18,773,186 km (0.101 R)
• M36: 19,147,331 km (0.118 R)
• M37: 19,272,694 km (0.08 R)
• M38: 19,650,129 km (0.061 R)
• M39: 22,228,000 km (0.07 R)
• M40: 22,425,618 km (0.082 R)
• M41: 23,892,426 km (0.108 R)
• M42: 24,773,707 km (0.114 R)
• M43: 25,390,050 km (0.102 R)
• M44: 25,665,609 km (0.062 R)
• M45: 25,803,688 km (0.115 R)
• M46: 26,219,720 km (0.094 R)
• M47: 27,128,377 km (0.114 R)
• M48: 29,120,572 km (0.093 R)
• M49: 29,192,528 km (0.113 R)
• M50: 29,553,508 km (0.043 R)
• M51: 29,698,319 km (0.079 R)
• M52: 30,498,967 km (0.05 R)
• M53: 32,943,097 km (0.09 R)
• M54: 34,378,787 km (0.093 R)
• M55: 34,454,933 km (0.085 R)
• M56: 35,295,972 km (0.066 R)
• M57: 35,526,502 km (0.104 R)
• M58: 37,388,846 km (0.09 R)
• M59: 37,780,793 km (0.111 R)
• M60: 39,521,513 km (0.069 R)
• M61: 40,161,044 km (0.073 R)
• M62: 40,562,565 km (0.089 R)
• M63: 40,804,016 km (0.115 R)
• M64: 42,753,127 km (0.093 R)
• M65: 43,409,413 km (0.062 R)
• M66: 44,234,744 km (0.099 R)
• M67: 44,649,280 km (0.108 R)
• M68: 45,231,664 km (0.116 R)
• M69: 45,900,516 km (0.037 R)
• M70: 46,068,215 km (0.025 R)
• M71: 46,741,256 km (0.079 R)
• M72: 51,454,636 km (0.099 R)
• M73: 52,065,295 km (0.078 R)
• M74: 52,590,683 km (0.079 R)
• M75: 52,766,161 km (0.08 R)
• M76: 53,470,019 km (0.084 R)
• M77: 53,558,282 km (0.052 R)
• M78: 53,911,632 km (0.06 R)
• M79: 54,177,168 km (0.056 R)
• M80: 54,620,576 km (0.078 R)
• M81: 56,406,625 km (0.087 R)
• M82: 57,306,756 km (0.112 R)
• M83: 59,030,123 km (0.104 R)
• M84: 61,046,852 km (0.046 R)
• M85: 61,323,608 km (0.115 R)

Kuiper Belt

Range: 31.4 - 58.4 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 531 - 11,039 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit