🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.57 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.86

Radius: 1.72

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.236

Orbit Range: 0.44 AU - 0.7 AU

Year: 187 Days

Day: 43 Hours

Environment

Temp: 25 °C

Axial Tilt: 31.2 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 2 - Terrestrial

Semi-Major Axis: 0.9 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.28

Radius: 1.79

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.11

Orbit Range: 0.8 AU - 1 AU

Year: 370 Days

Day: 23.7 Hours

Environment

Temp: -41 °C

Axial Tilt: 23.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 54,601,199 km

• M1: 61,036 km (0.09 R)

Planet 3 - Terrestrial

Semi-Major Axis: 2.58 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.37

Radius: 1.63

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.25

Orbit Range: 1.94 AU - 3.23 AU

Year: 1796 Days

Day: 28.5 Hours

Environment

Temp: -135 °C

Axial Tilt: 20 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 3.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 726.9

Radius: 13.9

Gravity: 3.76 G

Time & Orbit

Eccentricity (e): 0.065

Orbit Range: 2.82 AU - 3.22 AU

Year: 2275 Days

Day: 14.4 Hours

Environment

Temp: -154 °C

Axial Tilt: 27.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 54,601,199 km

• M1: 173,384 km (0.104 R)
• M2: 301,290 km (0.114 R)
• M3: 692,937 km (0.088 R)
• M4: 813,364 km (0.09 R)
• M5: 960,867 km (0.07 R)
• M6: 1,231,789 km (0.114 R)
• M7: 1,360,443 km (0.054 R)
• M8: 1,632,262 km (0.052 R)
• M9: 1,811,331 km (0.087 R)
• M10: 2,086,142 km (0.043 R)
• M11: 2,690,667 km (0.111 R)
• M12: 2,933,165 km (0.091 R)
• M13: 3,079,173 km (0.092 R)
• M14: 3,197,804 km (0.092 R)
• M15: 3,439,704 km (0.064 R)
• M16: 3,703,445 km (0.026 R)
• M17: 3,813,998 km (0.072 R)
• M18: 4,152,538 km (0.104 R)
• M19: 4,366,911 km (0.117 R)
• M20: 4,484,047 km (0.098 R)
• M21: 4,653,092 km (0.051 R)
• M22: 4,858,789 km (0.111 R)
• M23: 5,015,119 km (0.089 R)
• M24: 5,530,184 km (0.096 R)
• M25: 5,711,647 km (0.106 R)
• M26: 5,840,002 km (0.056 R)
• M27: 5,969,254 km (0.078 R)
• M28: 6,591,731 km (0.081 R)
• M29: 6,687,922 km (0.085 R)
• M30: 6,862,054 km (0.077 R)
• M31: 7,077,176 km (0.097 R)
• M32: 7,215,105 km (0.12 R)
• M33: 7,413,921 km (0.064 R)
• M34: 7,534,048 km (0.04 R)
• M35: 7,674,969 km (0.119 R)
• M36: 8,000,494 km (0.049 R)
• M37: 8,497,458 km (0.095 R)
• M38: 8,665,307 km (0.059 R)
• M39: 9,412,848 km (0.076 R)
• M40: 9,673,896 km (0.045 R)
• M41: 9,783,402 km (0.113 R)
• M42: 9,893,356 km (0.106 R)
• M43: 10,003,759 km (0.043 R)
• M44: 10,203,323 km (0.077 R)
• M45: 10,494,141 km (0.097 R)
• M46: 10,584,049 km (0.11 R)
• M47: 10,742,174 km (0.12 R)
• M48: 11,106,744 km (0.038 R)
• M49: 11,777,691 km (0.064 R)
• M50: 11,918,163 km (0.101 R)
• M51: 12,082,721 km (0.108 R)
• M52: 12,700,710 km (0.107 R)
• M53: 12,820,687 km (0.087 R)
• M54: 13,597,998 km (0.087 R)
• M55: 14,166,021 km (0.045 R)
• M56: 14,691,558 km (0.051 R)
• M57: 15,070,789 km (0.046 R)
• M58: 15,607,247 km (0.12 R)
• M59: 16,149,988 km (0.108 R)
• M60: 16,699,012 km (0.11 R)
• M61: 17,174,434 km (0.114 R)
• M62: 17,333,905 km (0.066 R)
• M63: 17,922,872 km (0.07 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 905.4

Radius: 9.8

Gravity: 9.43 G

Time & Orbit

Eccentricity (e): 0.153

Orbit Range: 2.98 AU - 4.06 AU

Year: 2863 Days

Day: 7.5 Hours

Environment

Temp: -146 °C

Axial Tilt: 34.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 54,601,199 km

• M1: 125,662 km (0.116 R)
• M2: 258,056 km (0.108 R)
• M3: 346,169 km (0.099 R)
• M4: 725,250 km (0.109 R)
• M5: 829,819 km (0.114 R)
• M6: 917,334 km (0.095 R)
• M7: 1,066,633 km (0.103 R)
• M8: 1,138,290 km (0.106 R)
• M9: 1,312,422 km (0.102 R)
• M10: 1,428,959 km (0.097 R)
• M11: 1,799,962 km (0.047 R)
• M12: 2,093,921 km (0.11 R)
• M13: 2,200,585 km (0.112 R)
• M14: 2,293,335 km (0.06 R)
• M15: 2,579,815 km (0.096 R)
• M16: 2,827,549 km (0.116 R)
• M17: 3,781,834 km (0.063 R)
• M18: 4,178,269 km (0.088 R)
• M19: 4,255,162 km (0.115 R)
• M20: 4,528,627 km (0.082 R)
• M21: 4,607,764 km (0.086 R)
• M22: 5,112,956 km (0.08 R)
• M23: 5,216,179 km (0.101 R)
• M24: 5,445,662 km (0.09 R)
• M25: 5,678,436 km (0.053 R)
• M26: 5,892,959 km (0.05 R)
• M27: 6,001,268 km (0.109 R)
• M28: 6,154,008 km (0.111 R)
• M29: 6,441,086 km (0.114 R)
• M30: 6,530,246 km (0.074 R)
• M31: 6,777,681 km (0.105 R)
• M32: 7,005,369 km (0.087 R)
• M33: 7,421,550 km (0.12 R)
• M34: 7,679,906 km (0.1 R)
• M35: 7,845,810 km (0.1 R)
• M36: 8,253,763 km (0.03 R)
• M37: 8,448,091 km (0.094 R)
• M38: 8,915,883 km (0.107 R)
• M39: 9,825,139 km (0.111 R)
• M40: 10,264,807 km (0.116 R)
• M41: 10,790,345 km (0.081 R)
• M42: 10,949,667 km (0.106 R)
• M43: 11,216,998 km (0.06 R)
• M44: 11,405,342 km (0.062 R)
• M45: 11,622,109 km (0.053 R)
• M46: 12,335,541 km (0.098 R)
• M47: 12,613,793 km (0.093 R)
• M48: 12,922,264 km (0.073 R)
• M49: 13,289,976 km (0.098 R)
• M50: 13,403,820 km (0.084 R)
• M51: 13,489,390 km (0.1 R)
• M52: 13,575,109 km (0.074 R)
• M53: 13,747,296 km (0.05 R)
• M54: 13,833,614 km (0.073 R)
• M55: 14,006,849 km (0.087 R)
• M56: 14,326,240 km (0.07 R)
• M57: 14,472,098 km (0.026 R)
• M58: 15,090,685 km (0.091 R)
• M59: 15,477,994 km (0.09 R)
• M60: 15,717,949 km (0.117 R)
• M61: 16,171,081 km (0.062 R)
• M62: 16,536,698 km (0.042 R)
• M63: 16,843,523 km (0.095 R)
• M64: 16,966,792 km (0.063 R)
• M65: 17,059,543 km (0.12 R)
• M66: 17,245,194 km (0.114 R)
• M67: 18,247,499 km (0.113 R)
• M68: 18,310,779 km (0.07 R)
• M69: 18,405,774 km (0.101 R)
• M70: 19,981,189 km (0.072 R)
• M71: 20,307,911 km (0.047 R)
• M72: 20,373,584 km (0.113 R)
• M73: 20,768,523 km (0.098 R)
• M74: 21,033,161 km (0.111 R)
• M75: 21,365,568 km (0.056 R)
• M76: 21,599,389 km (0.042 R)
• M77: 22,712,697 km (0.091 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 17

Radius: 14.3

Gravity: 0.08 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 3.49 AU - 4.81 AU

Year: 3665 Days

Day: 14.8 Hours

Environment

Temp: -158 °C

Axial Tilt: 3.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (34)

Outer Limit: 54,601,199 km

• M1: 189,391 km (0.117 R)
• M2: 338,839 km (0.114 R)
• M3: 490,083 km (0.05 R)
• M4: 793,018 km (0.037 R)
• M5: 903,272 km (0.106 R)
• M6: 1,009,038 km (0.065 R)
• M7: 1,119,590 km (0.113 R)
• M8: 1,330,823 km (0.069 R)
• M9: 1,519,466 km (0.066 R)
• M10: 1,611,169 km (0.104 R)
• M11: 1,781,262 km (0.102 R)
• M12: 1,897,948 km (0.085 R)
• M13: 2,058,018 km (0.115 R)
• M14: 2,222,576 km (0.084 R)
• M15: 2,427,525 km (0.058 R)
• M16: 2,638,906 km (0.074 R)
• M17: 2,956,204 km (0.101 R)
• M18: 3,127,343 km (0.112 R)
• M19: 3,253,903 km (0.11 R)
• M20: 3,669,187 km (0.044 R)
• M21: 3,777,795 km (0.108 R)
• M22: 3,930,086 km (0.089 R)
• M23: 4,092,998 km (0.095 R)
• M24: 4,479,110 km (0.115 R)
• M25: 4,712,782 km (0.113 R)
• M26: 4,886,315 km (0.081 R)
• M27: 5,286,639 km (0.115 R)
• M28: 5,581,945 km (0.09 R)
• M29: 5,785,099 km (0.062 R)
• M30: 5,882,787 km (0.088 R)
• M31: 6,288,945 km (0.072 R)
• M32: 6,389,325 km (0.067 R)
• M33: 6,530,845 km (0.1 R)
• M34: 6,622,399 km (0.088 R)

Asteroid Belt

Center: 5.44 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 7 - Gas Giant

Semi-Major Axis: 6.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 189.8

Radius: 13.4

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 5.31 AU - 8.13 AU

Year: 7551 Days

Day: 7.9 Hours

Environment

Temp: -190 °C

Axial Tilt: 17.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 54,601,199 km

• M1: 185,053 km (0.119 R)
• M2: 280,795 km (0.114 R)
• M3: 388,206 km (0.106 R)
• M4: 471,981 km (0.1 R)
• M5: 564,134 km (0.106 R)
• M6: 861,833 km (0.107 R)
• M7: 1,318,107 km (0.104 R)
• M8: 1,443,769 km (0.115 R)
• M9: 1,588,131 km (0.085 R)
• M10: 2,149,273 km (0.098 R)
• M11: 2,417,801 km (0.102 R)
• M12: 2,521,472 km (0.107 R)
• M13: 2,661,945 km (0.105 R)
• M14: 2,787,158 km (0.049 R)
• M15: 3,137,217 km (0.099 R)
• M16: 3,462,443 km (0.06 R)
• M17: 3,560,280 km (0.097 R)
• M18: 3,698,807 km (0.07 R)
• M19: 3,818,934 km (0.109 R)
• M20: 4,827,224 km (0.058 R)
• M21: 5,136,293 km (0.109 R)
• M22: 5,338,550 km (0.112 R)
• M23: 6,197,541 km (0.089 R)
• M24: 6,999,984 km (0.104 R)
• M25: 7,124,449 km (0.05 R)
• M26: 7,527,765 km (0.083 R)
• M27: 7,680,953 km (0.037 R)
• M28: 8,042,382 km (0.079 R)
• M29: 9,133,100 km (0.08 R)
• M30: 9,709,650 km (0.043 R)
• M31: 11,216,998 km (0.096 R)
• M32: 11,480,290 km (0.113 R)
• M33: 11,627,345 km (0.115 R)
• M34: 11,923,549 km (0.051 R)
• M35: 12,282,135 km (0.111 R)
• M36: 12,432,630 km (0.091 R)
• M37: 12,765,934 km (0.046 R)
• M38: 14,603,595 km (0.042 R)
• M39: 15,732,310 km (0.108 R)
• M40: 15,863,209 km (0.086 R)
• M41: 16,356,882 km (0.102 R)
• M42: 16,822,281 km (0.08 R)
• M43: 16,922,661 km (0.083 R)
• M44: 17,732,284 km (0.094 R)
• M45: 17,936,635 km (0.108 R)
• M46: 18,416,545 km (0.111 R)
• M47: 20,307,163 km (0.12 R)
• M48: 21,203,254 km (0.101 R)
• M49: 22,075,709 km (0.075 R)
• M50: 23,481,031 km (0.082 R)
• M51: 24,383,406 km (0.1 R)
• M52: 24,953,224 km (0.119 R)
• M53: 25,335,596 km (0.067 R)
• M54: 25,527,381 km (0.071 R)
• M55: 25,758,360 km (0.108 R)

Planet 8 - Gas Giant

Semi-Major Axis: 9.35 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 114.4

Radius: 14.7

Gravity: 0.53 G

Time & Orbit

Eccentricity (e): 0.083

Orbit Range: 8.57 AU - 10.13 AU

Year: 12393 Days

Day: 7.5 Hours

Environment

Temp: -187 °C

Axial Tilt: 1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 54,601,199 km

• M1: 183,706 km (0.116 R)
• M2: 281,543 km (0.098 R)
• M3: 443,408 km (0.055 R)
• M4: 541,843 km (0.119 R)
• M5: 696,079 km (0.12 R)
• M6: 867,817 km (0.09 R)
• M7: 1,111,512 km (0.119 R)
• M8: 1,287,290 km (0.091 R)
• M9: 1,667,717 km (0.049 R)
• M10: 1,768,546 km (0.119 R)
• M11: 2,084,048 km (0.053 R)
• M12: 2,193,404 km (0.087 R)
• M13: 2,870,185 km (0.094 R)
• M14: 3,285,319 km (0.118 R)
• M15: 3,435,216 km (0.115 R)
• M16: 3,697,760 km (0.086 R)
• M17: 4,196,220 km (0.096 R)
• M18: 4,289,121 km (0.044 R)
• M19: 4,477,165 km (0.056 R)
• M20: 4,716,222 km (0.082 R)
• M21: 5,206,903 km (0.076 R)
• M22: 5,560,254 km (0.036 R)
• M23: 5,921,533 km (0.072 R)
• M24: 6,026,251 km (0.117 R)
• M25: 6,370,775 km (0.095 R)
• M26: 6,748,958 km (0.114 R)
• M27: 7,106,796 km (0.059 R)
• M28: 7,274,047 km (0.034 R)
• M29: 7,726,580 km (0.095 R)
• M30: 7,898,768 km (0.075 R)
• M31: 8,188,389 km (0.082 R)
• M32: 8,540,692 km (0.107 R)
• M33: 8,988,139 km (0.062 R)
• M34: 9,843,839 km (0.114 R)
• M35: 10,218,582 km (0.093 R)
• M36: 10,629,976 km (0.114 R)
• M37: 11,208,471 km (0.058 R)
• M38: 11,371,084 km (0.1 R)
• M39: 11,468,921 km (0.052 R)
• M40: 11,896,471 km (0.06 R)
• M41: 12,062,226 km (0.113 R)
• M42: 12,835,049 km (0.037 R)
• M43: 13,313,313 km (0.09 R)
• M44: 13,451,093 km (0.09 R)
• M45: 13,693,291 km (0.092 R)
• M46: 14,252,189 km (0.066 R)
• M47: 14,534,630 km (0.103 R)
• M48: 15,428,776 km (0.074 R)
• M49: 16,304,074 km (0.052 R)
• M50: 16,673,431 km (0.114 R)
• M51: 17,008,380 km (0.094 R)
• M52: 17,157,978 km (0.119 R)
• M53: 19,103,050 km (0.081 R)
• M54: 19,688,277 km (0.077 R)
• M55: 20,398,567 km (0.108 R)
• M56: 20,756,854 km (0.094 R)
• M57: 21,117,235 km (0.069 R)
• M58: 21,237,811 km (0.069 R)
• M59: 22,867,381 km (0.041 R)
• M60: 23,281,019 km (0.098 R)
• M61: 24,199,849 km (0.048 R)
• M62: 24,326,110 km (0.08 R)
• M63: 24,452,520 km (0.114 R)
• M64: 24,579,229 km (0.115 R)
• M65: 25,557,599 km (0.081 R)
• M66: 26,332,068 km (0.118 R)
• M67: 26,592,069 km (0.081 R)
• M68: 27,027,099 km (0.081 R)
• M69: 27,816,228 km (0.119 R)
• M70: 28,169,279 km (0.051 R)
• M71: 28,701,847 km (0.087 R)
• M72: 29,148,098 km (0.105 R)
• M73: 29,327,316 km (0.12 R)
• M74: 29,596,742 km (0.117 R)
• M75: 29,912,094 km (0.113 R)

Planet 9 - Ice Giant

Semi-Major Axis: 15.97 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 132.3

Radius: 7

Gravity: 2.7 G

Time & Orbit

Eccentricity (e): 0.197

Orbit Range: 12.82 AU - 19.12 AU

Year: 27664 Days

Day: 18.1 Hours

Environment

Temp: -221 °C

Axial Tilt: 49.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 54,601,199 km

• M1: 126,111 km (0.063 R)
• M2: 384,616 km (0.112 R)
• M3: 590,164 km (0.062 R)
• M4: 642,523 km (0.065 R)
• M5: 771,177 km (0.072 R)
• M6: 969,693 km (0.056 R)
• M7: 1,184,366 km (0.117 R)
• M8: 1,633,160 km (0.053 R)
• M9: 2,021,965 km (0.053 R)
• M10: 2,130,423 km (0.027 R)
• M11: 2,467,467 km (0.059 R)
• M12: 2,731,208 km (0.09 R)
• M13: 3,254,053 km (0.119 R)
• M14: 3,413,674 km (0.086 R)
• M15: 4,637,534 km (0.093 R)
• M16: 4,817,351 km (0.075 R)
• M17: 5,109,964 km (0.118 R)
• M18: 5,333,164 km (0.079 R)
• M19: 5,673,948 km (0.035 R)
• M20: 6,139,497 km (0.112 R)
• M21: 6,456,495 km (0.112 R)
• M22: 6,738,486 km (0.107 R)
• M23: 7,948,584 km (0.114 R)
• M24: 8,556,549 km (0.103 R)
• M25: 8,688,794 km (0.106 R)
• M26: 8,777,206 km (0.12 R)
• M27: 9,089,417 km (0.096 R)
• M28: 9,179,325 km (0.098 R)
• M29: 9,224,354 km (0.034 R)
• M30: 9,678,982 km (0.112 R)
• M31: 10,374,463 km (0.111 R)
• M32: 10,609,780 km (0.037 R)
• M33: 10,799,321 km (0.079 R)
• M34: 11,085,950 km (0.084 R)
• M35: 12,455,668 km (0.106 R)
• M36: 12,806,475 km (0.116 R)
• M37: 13,211,287 km (0.11 R)
• M38: 13,466,501 km (0.12 R)
• M39: 14,661,190 km (0.1 R)
• M40: 16,873,443 km (0.092 R)
• M41: 17,261,350 km (0.118 R)
• M42: 17,708,498 km (0.077 R)
• M43: 18,671,011 km (0.098 R)
• M44: 19,360,657 km (0.049 R)
• M45: 20,352,042 km (0.117 R)
• M46: 20,528,568 km (0.107 R)
• M47: 20,587,659 km (0.108 R)
• M48: 20,824,173 km (0.074 R)
• M49: 21,960,070 km (0.082 R)
• M50: 23,115,863 km (0.094 R)
• M51: 23,608,489 km (0.113 R)
• M52: 23,670,273 km (0.073 R)
• M53: 25,486,241 km (0.036 R)
• M54: 26,186,808 km (0.103 R)
• M55: 26,250,836 km (0.073 R)
• M56: 27,022,761 km (0.102 R)
• M57: 28,260,384 km (0.093 R)
• M58: 28,523,228 km (0.077 R)
• M59: 29,117,730 km (0.097 R)
• M60: 29,383,266 km (0.079 R)
• M61: 29,849,862 km (0.077 R)
• M62: 30,587,977 km (0.116 R)
• M63: 31,877,212 km (0.101 R)
• M64: 32,082,311 km (0.083 R)
• M65: 32,907,492 km (0.113 R)
• M66: 33,183,949 km (0.083 R)
• M67: 34,018,406 km (0.108 R)
• M68: 34,088,268 km (0.071 R)
• M69: 34,648,662 km (0.032 R)
• M70: 35,000,516 km (0.092 R)
• M71: 35,141,587 km (0.113 R)
• M72: 36,348,243 km (0.052 R)
• M73: 37,208,132 km (0.08 R)
• M74: 38,801,948 km (0.086 R)
• M75: 39,167,415 km (0.094 R)
• M76: 39,387,175 km (0.118 R)
• M77: 39,975,094 km (0.088 R)
• M78: 40,788,458 km (0.074 R)
• M79: 41,607,207 km (0.104 R)
• M80: 42,206,047 km (0.092 R)
• M81: 43,109,618 km (0.064 R)
• M82: 43,336,558 km (0.096 R)
• M83: 45,627,201 km (0.098 R)
• M84: 46,012,864 km (0.117 R)
• M85: 46,709,691 km (0.076 R)
• M86: 47,565,989 km (0.05 R)
• M87: 49,927,990 km (0.097 R)
• M88: 50,245,736 km (0.071 R)
• M89: 51,363,232 km (0.025 R)
• M90: 53,054,885 km (0.097 R)
• M91: 53,379,213 km (0.101 R)
• M92: 53,460,445 km (0.114 R)
• M93: 53,622,908 km (0.117 R)
• M94: 54,601,128 km (0.104 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: 367 - 13,464 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit