🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.7 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.12

Radius: 1.58

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.056

Orbit Range: 0.66 AU - 0.74 AU

Year: 219 Days

Day: 36.1 Hours

Environment

Temp: 149 °C

Axial Tilt: 24.6 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (2)

Outer Limit: 73,812,814 km

• M1: 460,013 km (0.047 R)
• M2: 615,745 km (0.037 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.78 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.28

Radius: 1.1

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.213

Orbit Range: 0.61 AU - 0.95 AU

Year: 258 Days

Day: 38.8 Hours

Environment

Temp: 124 °C

Axial Tilt: 5.4 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 73,812,814 km

• M1: 340,186 km (0.061 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.07 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.34

Radius: 1.41

Gravity: 1.18 G

Time & Orbit

Eccentricity (e): 0.016

Orbit Range: 1.05 AU - 1.09 AU

Year: 415 Days

Day: 45.9 Hours

Environment

Temp: 9 °C

Axial Tilt: 9.9 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 4 - Terrestrial

Semi-Major Axis: 3.04 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.3

Radius: 1.4

Gravity: 1.17 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 2.86 AU - 3.22 AU

Year: 1986 Days

Day: 28.7 Hours

Environment

Temp: -107 °C

Axial Tilt: 8.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 3.96 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.66

Radius: 0.85

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.24

Orbit Range: 3.01 AU - 4.91 AU

Year: 2953 Days

Day: 16.2 Hours

Environment

Temp: -123 °C

Axial Tilt: 35.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 73,812,814 km

• M1: 318,045 km (0.072 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 441.3

Radius: 12

Gravity: 3.06 G

Time & Orbit

Eccentricity (e): 0.051

Orbit Range: 5.36 AU - 5.94 AU

Year: 5033 Days

Day: 11.5 Hours

Environment

Temp: -147 °C

Axial Tilt: 18.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 73,812,814 km

• M1: 206,894 km (0.108 R)
• M2: 291,417 km (0.117 R)
• M3: 389,553 km (0.068 R)
• M4: 652,396 km (0.109 R)
• M5: 783,294 km (0.052 R)
• M6: 887,863 km (0.083 R)
• M7: 1,112,410 km (0.095 R)
• M8: 1,204,861 km (0.087 R)
• M9: 1,831,676 km (0.113 R)
• M10: 1,958,685 km (0.11 R)
• M11: 2,426,477 km (0.079 R)
• M12: 2,745,570 km (0.092 R)
• M13: 3,173,120 km (0.045 R)
• M14: 3,249,715 km (0.079 R)
• M15: 3,404,698 km (0.081 R)
• M16: 3,582,121 km (0.12 R)
• M17: 3,987,232 km (0.059 R)
• M18: 4,952,288 km (0.116 R)
• M19: 5,041,448 km (0.027 R)
• M20: 5,153,796 km (0.103 R)
• M21: 5,403,774 km (0.071 R)
• M22: 5,821,601 km (0.055 R)
• M23: 5,939,484 km (0.041 R)
• M24: 6,034,479 km (0.057 R)
• M25: 6,322,305 km (0.079 R)
• M26: 6,467,864 km (0.08 R)
• M27: 6,861,755 km (0.113 R)
• M28: 7,137,015 km (0.117 R)
• M29: 7,544,071 km (0.085 R)
• M30: 7,646,994 km (0.053 R)
• M31: 7,750,366 km (0.109 R)
• M32: 7,828,307 km (0.054 R)
• M33: 8,010,966 km (0.069 R)
• M34: 8,945,803 km (0.05 R)
• M35: 9,027,484 km (0.08 R)
• M36: 9,274,320 km (0.116 R)
• M37: 9,440,074 km (0.102 R)
• M38: 9,606,726 km (0.074 R)
• M39: 9,690,501 km (0.09 R)
• M40: 10,056,118 km (0.063 R)
• M41: 11,034,040 km (0.101 R)
• M42: 11,297,930 km (0.061 R)
• M43: 11,712,616 km (0.094 R)
• M44: 11,951,823 km (0.069 R)
• M45: 12,771,170 km (0.117 R)
• M46: 12,894,140 km (0.084 R)
• M47: 13,048,375 km (0.114 R)
• M48: 13,671,450 km (0.063 R)
• M49: 14,176,941 km (0.1 R)
• M50: 14,399,992 km (0.1 R)
• M51: 14,592,225 km (0.114 R)
• M52: 15,434,611 km (0.07 R)
• M53: 15,994,107 km (0.071 R)
• M54: 16,326,214 km (0.113 R)
• M55: 17,200,464 km (0.081 R)
• M56: 17,780,455 km (0.074 R)
• M57: 18,124,530 km (0.051 R)
• M58: 18,332,172 km (0.039 R)
• M59: 18,714,694 km (0.108 R)
• M60: 19,416,906 km (0.105 R)
• M61: 19,593,880 km (0.118 R)
• M62: 19,878,116 km (0.094 R)
• M63: 20,092,191 km (0.085 R)
• M64: 20,630,594 km (0.113 R)
• M65: 20,738,902 km (0.062 R)
• M66: 21,319,641 km (0.11 R)
• M67: 21,832,014 km (0.098 R)
• M68: 22,052,970 km (0.055 R)
• M69: 22,348,576 km (0.108 R)
• M70: 23,356,117 km (0.074 R)
• M71: 23,582,010 km (0.117 R)
• M72: 24,416,616 km (0.094 R)
• M73: 24,531,208 km (0.107 R)
• M74: 24,607,653 km (0.057 R)
• M75: 25,145,158 km (0.097 R)
• M76: 25,531,569 km (0.071 R)
• M77: 25,686,553 km (0.051 R)
• M78: 25,841,985 km (0.106 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 134.2

Radius: 14

Gravity: 0.68 G

Time & Orbit

Eccentricity (e): 0.02

Orbit Range: 6.01 AU - 6.25 AU

Year: 5687 Days

Day: 9.1 Hours

Environment

Temp: -156 °C

Axial Tilt: 18 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (66)

Outer Limit: 73,812,814 km

• M1: 227,688 km (0.085 R)
• M2: 676,930 km (0.1 R)
• M3: 772,972 km (0.098 R)
• M4: 951,442 km (0.103 R)
• M5: 1,092,513 km (0.057 R)
• M6: 1,285,195 km (0.075 R)
• M7: 1,386,024 km (0.084 R)
• M8: 1,983,369 km (0.084 R)
• M9: 2,290,194 km (0.08 R)
• M10: 2,801,370 km (0.077 R)
• M11: 2,890,081 km (0.096 R)
• M12: 3,040,128 km (0.061 R)
• M13: 3,192,718 km (0.093 R)
• M14: 3,410,981 km (0.117 R)
• M15: 3,505,976 km (0.09 R)
• M16: 3,698,807 km (0.092 R)
• M17: 3,812,951 km (0.065 R)
• M18: 3,994,712 km (0.05 R)
• M19: 4,196,370 km (0.095 R)
• M20: 4,401,469 km (0.077 R)
• M21: 4,662,517 km (0.102 R)
• M22: 4,875,095 km (0.085 R)
• M23: 5,181,771 km (0.053 R)
• M24: 5,909,415 km (0.066 R)
• M25: 6,275,631 km (0.076 R)
• M26: 6,491,052 km (0.078 R)
• M27: 7,152,125 km (0.118 R)
• M28: 7,398,063 km (0.114 R)
• M29: 7,563,369 km (0.105 R)
• M30: 7,667,489 km (0.074 R)
• M31: 8,280,242 km (0.112 R)
• M32: 8,538,448 km (0.11 R)
• M33: 8,733,972 km (0.094 R)
• M34: 8,865,020 km (0.111 R)
• M35: 9,240,212 km (0.045 R)
• M36: 9,733,436 km (0.102 R)
• M37: 9,869,420 km (0.045 R)
• M38: 10,512,542 km (0.097 R)
• M39: 11,122,003 km (0.089 R)
• M40: 11,455,008 km (0.118 R)
• M41: 11,550,751 km (0.075 R)
• M42: 11,718,899 km (0.103 R)
• M43: 12,375,185 km (0.095 R)
• M44: 12,646,106 km (0.071 R)
• M45: 12,869,157 km (0.098 R)
• M46: 13,068,571 km (0.073 R)
• M47: 13,269,032 km (0.067 R)
• M48: 13,470,391 km (0.03 R)
• M49: 13,647,515 km (0.101 R)
• M50: 13,927,412 km (0.108 R)
• M51: 14,338,058 km (0.048 R)
• M52: 14,726,564 km (0.082 R)
• M53: 14,830,684 km (0.115 R)
• M54: 15,118,510 km (0.116 R)
• M55: 15,328,995 km (0.098 R)
• M56: 15,619,962 km (0.078 R)
• M57: 15,859,469 km (0.108 R)
• M58: 15,966,282 km (0.108 R)
• M59: 16,100,172 km (0.097 R)
• M60: 16,288,216 km (0.111 R)
• M61: 16,449,931 km (0.103 R)
• M62: 16,639,472 km (0.094 R)
• M63: 18,097,004 km (0.093 R)
• M64: 18,292,528 km (0.099 R)
• M65: 18,432,702 km (0.037 R)
• M66: 18,911,864 km (0.049 R)

Planet 8 - Gas Giant

Semi-Major Axis: 7.28 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 28.8

Radius: 10.8

Gravity: 0.25 G

Time & Orbit

Eccentricity (e): 0.242

Orbit Range: 5.52 AU - 9.04 AU

Year: 7361 Days

Day: 8.9 Hours

Environment

Temp: -160 °C

Axial Tilt: 38.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 73,812,814 km

• M1: 145,858 km (0.088 R)
• M2: 341,981 km (0.045 R)
• M3: 427,401 km (0.111 R)
• M4: 757,713 km (0.071 R)
• M5: 831,465 km (0.038 R)
• M6: 915,838 km (0.048 R)
• M7: 1,044,193 km (0.093 R)
• M8: 1,213,538 km (0.092 R)
• M9: 1,383,032 km (0.089 R)
• M10: 1,494,333 km (0.113 R)
• M11: 1,599,052 km (0.066 R)
• M12: 1,716,187 km (0.119 R)
• M13: 2,032,287 km (0.072 R)
• M14: 2,127,581 km (0.058 R)
• M15: 2,257,133 km (0.063 R)
• M16: 2,592,531 km (0.075 R)
• M17: 3,360,716 km (0.054 R)
• M18: 3,653,330 km (0.077 R)
• M19: 3,783,181 km (0.113 R)
• M20: 3,875,034 km (0.07 R)
• M21: 3,980,799 km (0.113 R)
• M22: 4,060,834 km (0.086 R)
• M23: 4,168,545 km (0.076 R)
• M24: 4,263,390 km (0.09 R)
• M25: 4,538,650 km (0.092 R)
• M26: 4,948,099 km (0.076 R)
• M27: 5,237,421 km (0.108 R)
• M28: 5,532,279 km (0.083 R)
• M29: 6,293,433 km (0.053 R)
• M30: 6,449,613 km (0.06 R)
• M31: 6,941,940 km (0.106 R)
• M32: 7,038,729 km (0.105 R)
• M33: 7,119,662 km (0.101 R)
• M34: 7,217,200 km (0.06 R)
• M35: 7,331,492 km (0.081 R)
• M36: 7,979,850 km (0.093 R)
• M37: 8,285,179 km (0.108 R)
• M38: 9,136,092 km (0.052 R)
• M39: 9,259,959 km (0.109 R)
• M40: 9,366,472 km (0.119 R)
• M41: 9,869,420 km (0.061 R)
• M42: 10,142,436 km (0.067 R)
• M43: 10,289,042 km (0.042 R)
• M44: 10,473,347 km (0.083 R)
• M45: 10,621,598 km (0.114 R)
• M46: 10,845,247 km (0.107 R)
• M47: 10,957,595 km (0.083 R)
• M48: 11,335,180 km (0.096 R)
• M49: 11,430,175 km (0.111 R)
• M50: 11,716,954 km (0.092 R)
• M51: 12,103,066 km (0.109 R)
• M52: 12,454,172 km (0.057 R)
• M53: 12,690,088 km (0.106 R)
• M54: 12,987,040 km (0.112 R)
• M55: 13,126,465 km (0.082 R)
• M56: 13,466,950 km (0.109 R)

Planet 9 - Gas Giant

Semi-Major Axis: 11.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 650.9

Radius: 10.1

Gravity: 6.38 G

Time & Orbit

Eccentricity (e): 0.195

Orbit Range: 9.61 AU - 14.27 AU

Year: 15461 Days

Day: 12.4 Hours

Environment

Temp: -178 °C

Axial Tilt: 38.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 73,812,814 km

• M1: 154,834 km (0.106 R)
• M2: 229,782 km (0.106 R)
• M3: 436,227 km (0.098 R)
• M4: 746,045 km (0.116 R)
• M5: 1,119,890 km (0.1 R)
• M6: 1,216,081 km (0.04 R)
• M7: 1,365,829 km (0.089 R)
• M8: 1,495,530 km (0.118 R)
• M9: 1,602,193 km (0.086 R)
• M10: 1,851,872 km (0.059 R)
• M11: 1,937,891 km (0.061 R)
• M12: 2,295,729 km (0.111 R)
• M13: 3,419,658 km (0.119 R)
• M14: 3,633,583 km (0.112 R)
• M15: 3,705,988 km (0.108 R)
• M16: 3,778,693 km (0.04 R)
• M17: 3,851,996 km (0.115 R)
• M18: 3,962,997 km (0.077 R)
• M19: 4,225,841 km (0.086 R)
• M20: 4,848,018 km (0.043 R)
• M21: 5,169,953 km (0.06 R)
• M22: 6,220,279 km (0.098 R)
• M23: 6,438,244 km (0.071 R)
• M24: 7,198,051 km (0.044 R)
• M25: 7,658,065 km (0.072 R)
• M26: 7,798,088 km (0.107 R)
• M27: 8,366,261 km (0.105 R)
• M28: 8,510,324 km (0.107 R)
• M29: 8,606,964 km (0.062 R)
• M30: 8,849,911 km (0.079 R)
• M31: 10,406,626 km (0.116 R)
• M32: 10,613,670 km (0.113 R)
• M33: 11,348,943 km (0.03 R)
• M34: 11,615,527 km (0.085 R)
• M35: 11,830,200 km (0.052 R)
• M36: 13,314,061 km (0.086 R)
• M37: 13,595,305 km (0.064 R)
• M38: 13,708,251 km (0.088 R)
• M39: 14,797,623 km (0.086 R)
• M40: 17,548,279 km (0.063 R)
• M41: 18,166,866 km (0.099 R)
• M42: 18,353,714 km (0.095 R)
• M43: 18,918,446 km (0.038 R)
• M44: 19,552,591 km (0.061 R)
• M45: 20,064,964 km (0.094 R)
• M46: 20,193,768 km (0.079 R)
• M47: 20,322,721 km (0.107 R)
• M48: 20,972,125 km (0.067 R)
• M49: 21,430,793 km (0.036 R)
• M50: 21,892,751 km (0.114 R)
• M51: 22,893,710 km (0.068 R)
• M52: 23,095,667 km (0.088 R)
• M53: 26,618,847 km (0.112 R)
• M54: 28,695,714 km (0.104 R)
• M55: 28,840,973 km (0.087 R)
• M56: 29,423,956 km (0.107 R)
• M57: 29,937,376 km (0.11 R)
• M58: 30,158,183 km (0.084 R)
• M59: 30,749,992 km (0.099 R)
• M60: 31,569,938 km (0.079 R)
• M61: 32,699,551 km (0.108 R)
• M62: 33,231,372 km (0.069 R)
• M63: 34,303,241 km (0.1 R)
• M64: 34,534,519 km (0.088 R)
• M65: 36,167,230 km (0.087 R)
• M66: 37,190,629 km (0.075 R)
• M67: 38,463,258 km (0.108 R)
• M68: 39,104,883 km (0.107 R)
• M69: 39,669,167 km (0.118 R)
• M70: 39,911,814 km (0.081 R)
• M71: 41,296,343 km (0.102 R)
• M72: 41,953,227 km (0.062 R)
• M73: 42,530,974 km (0.094 R)
• M74: 42,696,579 km (0.073 R)
• M75: 43,944,823 km (0.087 R)
• M76: 44,615,620 km (0.1 R)
• M77: 46,307,123 km (0.119 R)
• M78: 46,904,019 km (0.072 R)
• M79: 48,191,907 km (0.106 R)
• M80: 49,230,565 km (0.101 R)
• M81: 49,317,481 km (0.092 R)
• M82: 49,839,877 km (0.077 R)
• M83: 50,189,038 km (0.112 R)
• M84: 51,065,832 km (0.116 R)
• M85: 53,636,970 km (0.088 R)
• M86: 53,905,349 km (0.102 R)
• M87: 54,803,086 km (0.113 R)
• M88: 57,800,877 km (0.117 R)
• M89: 60,851,327 km (0.12 R)
• M90: 61,786,165 km (0.085 R)
• M91: 62,631,393 km (0.051 R)

Planet 10 - Ice Giant

Semi-Major Axis: 12.56 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 899

Radius: 7.8

Gravity: 14.78 G

Time & Orbit

Eccentricity (e): 0.132

Orbit Range: 10.9 AU - 14.22 AU

Year: 16681 Days

Day: 24.1 Hours

Environment

Temp: -189 °C

Axial Tilt: 37.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 73,812,814 km

• M1: 115,639 km (0.094 R)
• M2: 621,579 km (0.111 R)
• M3: 1,153,400 km (0.105 R)
• M4: 1,346,979 km (0.111 R)
• M5: 1,988,604 km (0.104 R)
• M6: 2,187,719 km (0.081 R)
• M7: 3,085,007 km (0.035 R)
• M8: 3,238,196 km (0.104 R)
• M9: 3,354,882 km (0.064 R)
• M10: 3,512,408 km (0.088 R)
• M11: 3,753,411 km (0.072 R)
• M12: 4,041,536 km (0.109 R)
• M13: 4,682,713 km (0.094 R)
• M14: 5,218,423 km (0.059 R)
• M15: 5,820,554 km (0.028 R)
• M16: 5,915,249 km (0.102 R)
• M17: 6,105,987 km (0.115 R)
• M18: 6,839,315 km (0.101 R)
• M19: 7,089,892 km (0.086 R)
• M20: 7,445,785 km (0.029 R)
• M21: 8,281,289 km (0.112 R)
• M22: 8,710,037 km (0.1 R)
• M23: 9,036,459 km (0.119 R)
• M24: 9,201,167 km (0.11 R)
• M25: 9,645,173 km (0.111 R)
• M26: 9,701,123 km (0.072 R)
• M27: 9,869,869 km (0.086 R)
• M28: 10,381,643 km (0.075 R)
• M29: 11,609,244 km (0.055 R)
• M30: 12,697,418 km (0.055 R)
• M31: 12,758,903 km (0.068 R)
• M32: 12,820,388 km (0.115 R)
• M33: 15,295,485 km (0.036 R)
• M34: 15,426,233 km (0.109 R)
• M35: 15,755,049 km (0.053 R)
• M36: 16,419,264 km (0.086 R)
• M37: 17,092,903 km (0.079 R)
• M38: 19,875,872 km (0.094 R)
• M39: 20,090,246 km (0.102 R)
• M40: 20,737,855 km (0.109 R)
• M41: 21,905,915 km (0.093 R)
• M42: 21,979,667 km (0.113 R)
• M43: 22,275,422 km (0.085 R)
• M44: 24,001,183 km (0.1 R)
• M45: 24,305,615 km (0.102 R)
• M46: 24,382,059 km (0.108 R)
• M47: 24,841,624 km (0.104 R)
• M48: 26,003,251 km (0.11 R)
• M49: 26,708,755 km (0.101 R)
• M50: 27,420,392 km (0.106 R)
• M51: 27,818,472 km (0.111 R)
• M52: 33,589,060 km (0.103 R)
• M53: 33,759,153 km (0.119 R)
• M54: 34,185,806 km (0.118 R)
• M55: 34,271,376 km (0.07 R)
• M56: 34,958,330 km (0.118 R)
• M57: 35,389,919 km (0.088 R)
• M58: 35,910,221 km (0.066 R)
• M59: 37,046,118 km (0.101 R)
• M60: 37,222,045 km (0.096 R)
• M61: 38,371,555 km (0.048 R)
• M62: 39,353,216 km (0.043 R)
• M63: 39,802,159 km (0.056 R)
• M64: 40,162,690 km (0.031 R)
• M65: 40,524,118 km (0.107 R)
• M66: 40,795,938 km (0.101 R)
• M67: 41,159,311 km (0.111 R)
• M68: 42,347,716 km (0.075 R)
• M69: 42,439,570 km (0.098 R)
• M70: 42,623,575 km (0.029 R)
• M71: 43,177,087 km (0.113 R)
• M72: 44,477,841 km (0.103 R)
• M73: 46,168,895 km (0.086 R)
• M74: 49,710,774 km (0.083 R)
• M75: 49,807,713 km (0.088 R)
• M76: 50,001,742 km (0.066 R)
• M77: 53,041,720 km (0.058 R)
• M78: 54,834,052 km (0.043 R)
• M79: 56,342,896 km (0.076 R)
• M80: 58,069,256 km (0.054 R)
• M81: 58,375,632 km (0.076 R)
• M82: 60,846,690 km (0.083 R)
• M83: 61,054,182 km (0.084 R)
• M84: 61,469,765 km (0.037 R)
• M85: 61,677,856 km (0.113 R)
• M86: 62,094,935 km (0.091 R)
• M87: 63,667,059 km (0.077 R)
• M88: 64,194,092 km (0.06 R)
• M89: 69,109,579 km (0.041 R)
• M90: 69,976,798 km (0.11 R)
• M91: 70,956,664 km (0.072 R)
• M92: 71,393,639 km (0.119 R)
• M93: 72,489,892 km (0.085 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: 386 - 18,095 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit