🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.1 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.77

Radius: 0.9

Gravity: 0.95 G

Time & Orbit

Eccentricity (e): 0.055

Orbit Range: 1.04 AU - 1.16 AU

Year: 430 Days

Day: 35.1 Hours

Environment

Temp: -2 °C

Axial Tilt: 11.8 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 74,091,180 km

• M1: 530,474 km (0.072 R)

Asteroid Belt

Center: 1.39 AU

Composition

Type: Inner System (Rocky)

A dense region of planetesimals and debris.

Boundary

Planet 2 - Terrestrial

Semi-Major Axis: 1.68 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.64

Radius: 1.22

Gravity: 1.1 G

Time & Orbit

Eccentricity (e): 0.112

Orbit Range: 1.49 AU - 1.87 AU

Year: 812 Days

Day: 26.7 Hours

Environment

Temp: -56 °C

Axial Tilt: 29 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 1.9 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.05

Radius: 1.02

Gravity: 1.01 G

Time & Orbit

Eccentricity (e): 0.195

Orbit Range: 1.53 AU - 2.27 AU

Year: 976 Days

Day: 37.6 Hours

Environment

Temp: -60 °C

Axial Tilt: 11.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 2.5 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.61

Radius: 1.21

Gravity: 1.1 G

Time & Orbit

Eccentricity (e): 0.244

Orbit Range: 1.89 AU - 3.11 AU

Year: 1474 Days

Day: 36.9 Hours

Environment

Temp: -97 °C

Axial Tilt: 42.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 74,091,180 km

• M1: 1,658,592 km (0.081 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 161.3

Radius: 11.7

Gravity: 1.18 G

Time & Orbit

Eccentricity (e): 0.161

Orbit Range: 4.04 AU - 5.58 AU

Year: 3933 Days

Day: 10 Hours

Environment

Temp: -140 °C

Axial Tilt: 11.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (57)

Outer Limit: 74,091,180 km

• M1: 154,684 km (0.092 R)
• M2: 252,970 km (0.112 R)
• M3: 406,308 km (0.116 R)
• M4: 501,751 km (0.102 R)
• M5: 577,597 km (0.068 R)
• M6: 704,307 km (0.098 R)
• M7: 783,594 km (0.097 R)
• M8: 970,142 km (0.066 R)
• M9: 1,050,925 km (0.067 R)
• M10: 1,143,526 km (0.089 R)
• M11: 1,239,269 km (0.087 R)
• M12: 1,542,952 km (0.079 R)
• M13: 1,638,845 km (0.112 R)
• M14: 1,870,572 km (0.118 R)
• M15: 2,077,914 km (0.101 R)
• M16: 2,220,481 km (0.087 R)
• M17: 2,329,538 km (0.098 R)
• M18: 2,528,054 km (0.113 R)
• M19: 2,667,779 km (0.095 R)
• M20: 2,784,166 km (0.101 R)
• M21: 2,955,156 km (0.049 R)
• M22: 3,419,059 km (0.117 R)
• M23: 3,503,433 km (0.12 R)
• M24: 3,588,404 km (0.098 R)
• M25: 3,935,471 km (0.119 R)
• M26: 4,248,131 km (0.059 R)
• M27: 4,568,869 km (0.084 R)
• M28: 4,787,132 km (0.059 R)
• M29: 5,056,857 km (0.109 R)
• M30: 5,201,668 km (0.078 R)
• M31: 5,462,716 km (0.091 R)
• M32: 5,811,728 km (0.039 R)
• M33: 5,980,474 km (0.106 R)
• M34: 6,219,531 km (0.079 R)
• M35: 6,305,700 km (0.115 R)
• M36: 7,045,162 km (0.07 R)
• M37: 7,461,792 km (0.059 R)
• M38: 7,775,050 km (0.096 R)
• M39: 8,567,171 km (0.072 R)
• M40: 8,895,089 km (0.103 R)
• M41: 9,305,885 km (0.081 R)
• M42: 9,563,343 km (0.116 R)
• M43: 9,643,079 km (0.1 R)
• M44: 9,943,920 km (0.088 R)
• M45: 10,207,212 km (0.102 R)
• M46: 10,411,264 km (0.068 R)
• M47: 10,493,393 km (0.104 R)
• M48: 10,678,745 km (0.092 R)
• M49: 11,642,903 km (0.083 R)
• M50: 11,770,660 km (0.111 R)
• M51: 11,941,800 km (0.062 R)
• M52: 12,049,211 km (0.113 R)
• M53: 12,482,147 km (0.119 R)
• M54: 14,150,463 km (0.025 R)
• M55: 15,068,545 km (0.074 R)
• M56: 15,161,445 km (0.038 R)
• M57: 15,769,860 km (0.118 R)

Planet 6 - Gas Giant

Semi-Major Axis: 8.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 942.5

Radius: 10.7

Gravity: 8.23 G

Time & Orbit

Eccentricity (e): 0.188

Orbit Range: 7.18 AU - 10.5 AU

Year: 9798 Days

Day: 9.8 Hours

Environment

Temp: -175 °C

Axial Tilt: 31.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 74,091,180 km

• M1: 151,543 km (0.092 R)
• M2: 506,389 km (0.084 R)
• M3: 684,709 km (0.083 R)
• M4: 1,042,847 km (0.094 R)
• M5: 1,125,574 km (0.091 R)
• M6: 1,410,259 km (0.069 R)
• M7: 2,205,671 km (0.05 R)
• M8: 2,479,286 km (0.05 R)
• M9: 3,617,127 km (0.099 R)
• M10: 4,105,863 km (0.116 R)
• M11: 4,172,584 km (0.042 R)
• M12: 4,895,740 km (0.079 R)
• M13: 5,109,515 km (0.05 R)
• M14: 5,326,283 km (0.11 R)
• M15: 5,995,135 km (0.097 R)
• M16: 6,109,278 km (0.068 R)
• M17: 6,262,466 km (0.097 R)
• M18: 6,417,001 km (0.111 R)
• M19: 6,690,466 km (0.078 R)
• M20: 7,168,132 km (0.089 R)
• M21: 7,988,975 km (0.072 R)
• M22: 8,325,570 km (0.086 R)
• M23: 8,538,298 km (0.117 R)
• M24: 8,882,523 km (0.032 R)
• M25: 9,056,356 km (0.115 R)
• M26: 9,319,199 km (0.088 R)
• M27: 9,942,424 km (0.102 R)
• M28: 10,395,855 km (0.092 R)
• M29: 10,809,643 km (0.037 R)
• M30: 11,041,968 km (0.115 R)
• M31: 11,464,134 km (0.098 R)
• M32: 12,958,916 km (0.113 R)
• M33: 13,106,718 km (0.078 R)
• M34: 13,255,269 km (0.064 R)
• M35: 13,354,452 km (0.099 R)
• M36: 14,873,320 km (0.11 R)
• M37: 15,183,585 km (0.11 R)
• M38: 15,758,041 km (0.105 R)
• M39: 15,968,825 km (0.075 R)
• M40: 16,074,441 km (0.103 R)
• M41: 16,392,935 km (0.043 R)
• M42: 17,523,895 km (0.117 R)
• M43: 17,796,911 km (0.067 R)
• M44: 18,680,137 km (0.07 R)
• M45: 19,070,886 km (0.043 R)
• M46: 19,408,080 km (0.086 R)
• M47: 21,355,694 km (0.112 R)
• M48: 22,589,578 km (0.088 R)
• M49: 23,304,955 km (0.111 R)
• M50: 23,424,932 km (0.111 R)
• M51: 24,331,046 km (0.115 R)
• M52: 24,635,777 km (0.12 R)
• M53: 25,681,018 km (0.117 R)
• M54: 26,177,832 km (0.091 R)
• M55: 26,427,511 km (0.076 R)
• M56: 27,181,036 km (0.054 R)
• M57: 27,497,136 km (0.103 R)
• M58: 27,751,003 km (0.098 R)
• M59: 27,878,162 km (0.098 R)
• M60: 28,452,767 km (0.073 R)
• M61: 29,419,319 km (0.076 R)
• M62: 30,069,621 km (0.048 R)
• M63: 30,593,213 km (0.111 R)
• M64: 30,790,383 km (0.104 R)
• M65: 33,391,591 km (0.044 R)
• M66: 33,594,595 km (0.093 R)
• M67: 35,647,078 km (0.028 R)
• M68: 36,131,925 km (0.088 R)
• M69: 39,014,676 km (0.115 R)
• M70: 39,228,601 km (0.076 R)
• M71: 40,015,934 km (0.097 R)
• M72: 41,897,726 km (0.113 R)
• M73: 42,409,201 km (0.107 R)
• M74: 42,482,504 km (0.116 R)
• M75: 42,702,413 km (0.12 R)
• M76: 43,882,142 km (0.099 R)
• M77: 44,401,695 km (0.083 R)
• M78: 44,923,193 km (0.078 R)
• M79: 45,147,291 km (0.117 R)
• M80: 46,273,613 km (0.03 R)
• M81: 48,171,262 km (0.111 R)
• M82: 48,630,378 km (0.116 R)
• M83: 49,091,140 km (0.101 R)
• M84: 49,168,033 km (0.027 R)
• M85: 50,404,160 km (0.106 R)

Planet 7 - Gas Giant

Semi-Major Axis: 11.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 542.9

Radius: 10.9

Gravity: 4.57 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 11.15 AU - 12.57 AU

Year: 15226 Days

Day: 6.5 Hours

Environment

Temp: -189 °C

Axial Tilt: 25.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 74,091,180 km

• M1: 243,097 km (0.077 R)
• M2: 339,886 km (0.064 R)
• M3: 657,782 km (0.099 R)
• M4: 1,290,880 km (0.081 R)
• M5: 1,460,973 km (0.114 R)
• M6: 2,301,713 km (0.069 R)
• M7: 2,390,125 km (0.096 R)
• M8: 2,631,427 km (0.052 R)
• M9: 3,236,700 km (0.045 R)
• M10: 4,834,106 km (0.107 R)
• M11: 5,532,428 km (0.048 R)
• M12: 6,097,310 km (0.065 R)
• M13: 6,386,782 km (0.084 R)
• M14: 6,512,295 km (0.069 R)
• M15: 6,723,228 km (0.06 R)
• M16: 7,811,402 km (0.11 R)
• M17: 8,035,500 km (0.054 R)
• M18: 10,050,135 km (0.069 R)
• M19: 10,738,285 km (0.077 R)
• M20: 10,887,733 km (0.109 R)
• M21: 11,492,557 km (0.111 R)
• M22: 11,850,246 km (0.114 R)
• M23: 12,681,860 km (0.087 R)
• M24: 12,839,985 km (0.088 R)
• M25: 13,478,619 km (0.109 R)
• M26: 14,566,045 km (0.033 R)
• M27: 16,249,620 km (0.05 R)
• M28: 16,593,695 km (0.039 R)
• M29: 18,290,434 km (0.097 R)
• M30: 20,906,153 km (0.111 R)
• M31: 21,909,057 km (0.051 R)
• M32: 22,225,756 km (0.106 R)
• M33: 22,416,493 km (0.039 R)
• M34: 22,991,846 km (0.114 R)
• M35: 24,549,908 km (0.082 R)
• M36: 25,607,416 km (0.11 R)
• M37: 25,740,707 km (0.099 R)
• M38: 25,874,149 km (0.059 R)
• M39: 26,343,138 km (0.117 R)
• M40: 26,612,414 km (0.103 R)
• M41: 28,937,763 km (0.077 R)
• M42: 29,704,004 km (0.094 R)
• M43: 30,194,984 km (0.095 R)
• M44: 30,901,086 km (0.107 R)
• M45: 33,779,798 km (0.092 R)
• M46: 34,512,827 km (0.047 R)
• M47: 34,807,385 km (0.063 R)
• M48: 37,270,066 km (0.075 R)
• M49: 37,421,159 km (0.084 R)
• M50: 37,951,484 km (0.049 R)
• M51: 38,331,762 km (0.05 R)
• M52: 39,711,353 km (0.118 R)
• M53: 40,097,465 km (0.1 R)
• M54: 42,440,168 km (0.066 R)
• M55: 44,266,160 km (0.107 R)
• M56: 44,506,115 km (0.083 R)
• M57: 44,746,668 km (0.099 R)
• M58: 45,148,488 km (0.12 R)
• M59: 45,470,722 km (0.047 R)
• M60: 46,604,673 km (0.098 R)
• M61: 50,813,909 km (0.088 R)
• M62: 51,233,082 km (0.082 R)
• M63: 51,485,154 km (0.065 R)
• M64: 51,906,123 km (0.081 R)
• M65: 53,091,088 km (0.119 R)
• M66: 54,627,607 km (0.115 R)
• M67: 54,799,196 km (0.088 R)
• M68: 56,785,856 km (0.105 R)
• M69: 56,959,688 km (0.102 R)
• M70: 58,181,753 km (0.054 R)

Planet 8 - Gas Giant

Semi-Major Axis: 11.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 344.6

Radius: 8.7

Gravity: 4.55 G

Time & Orbit

Eccentricity (e): 0.024

Orbit Range: 11.65 AU - 12.23 AU

Year: 15380 Days

Day: 10.3 Hours

Environment

Temp: -192 °C

Axial Tilt: 15.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 74,091,180 km

• M1: 273,615 km (0.06 R)
• M2: 483,650 km (0.101 R)
• M3: 560,094 km (0.108 R)
• M4: 816,206 km (0.063 R)
• M5: 928,853 km (0.084 R)
• M6: 1,386,473 km (0.07 R)
• M7: 1,759,421 km (0.056 R)
• M8: 1,932,206 km (0.105 R)
• M9: 2,136,706 km (0.115 R)
• M10: 2,820,369 km (0.072 R)
• M11: 3,291,452 km (0.063 R)
• M12: 3,787,070 km (0.085 R)
• M13: 3,979,004 km (0.1 R)
• M14: 4,043,630 km (0.093 R)
• M15: 4,709,939 km (0.093 R)
• M16: 4,951,091 km (0.114 R)
• M17: 5,699,080 km (0.12 R)
• M18: 6,104,940 km (0.045 R)
• M19: 6,405,930 km (0.119 R)
• M20: 6,750,454 km (0.07 R)
• M21: 7,338,075 km (0.119 R)
• M22: 7,738,997 km (0.105 R)
• M23: 7,860,620 km (0.116 R)
• M24: 8,146,950 km (0.114 R)
• M25: 8,353,695 km (0.108 R)
• M26: 8,562,085 km (0.062 R)
• M27: 8,687,896 km (0.051 R)
• M28: 9,154,642 km (0.098 R)
• M29: 9,455,932 km (0.086 R)
• M30: 10,112,517 km (0.061 R)
• M31: 10,603,347 km (0.096 R)
• M32: 10,738,584 km (0.082 R)
• M33: 10,965,374 km (0.101 R)
• M34: 11,608,346 km (0.119 R)
• M35: 11,840,971 km (0.068 R)
• M36: 11,934,469 km (0.118 R)
• M37: 13,027,132 km (0.08 R)
• M38: 13,658,884 km (0.099 R)
• M39: 15,715,855 km (0.099 R)
• M40: 16,128,296 km (0.088 R)
• M41: 17,122,374 km (0.087 R)
• M42: 17,387,162 km (0.053 R)
• M43: 17,600,040 km (0.056 R)
• M44: 17,813,815 km (0.045 R)
• M45: 18,243,909 km (0.054 R)
• M46: 19,224,074 km (0.086 R)
• M47: 21,405,959 km (0.103 R)
• M48: 21,462,956 km (0.096 R)
• M49: 21,978,022 km (0.111 R)
• M50: 22,439,232 km (0.091 R)
• M51: 22,729,003 km (0.053 R)
• M52: 23,429,869 km (0.08 R)
• M53: 23,782,920 km (0.082 R)
• M54: 24,434,718 km (0.113 R)
• M55: 25,333,053 km (0.048 R)
• M56: 25,393,341 km (0.074 R)
• M57: 27,285,455 km (0.062 R)
• M58: 27,967,771 km (0.09 R)
• M59: 28,342,214 km (0.085 R)
• M60: 28,404,746 km (0.084 R)
• M61: 29,412,288 km (0.087 R)
• M62: 32,832,544 km (0.071 R)
• M63: 32,898,217 km (0.061 R)
• M64: 33,756,760 km (0.116 R)
• M65: 34,689,502 km (0.114 R)
• M66: 34,890,562 km (0.12 R)
• M67: 35,901,245 km (0.106 R)
• M68: 36,240,383 km (0.104 R)
• M69: 36,444,285 km (0.105 R)
• M70: 36,512,352 km (0.102 R)
• M71: 36,648,636 km (0.067 R)
• M72: 36,785,069 km (0.045 R)
• M73: 37,951,484 km (0.114 R)
• M74: 38,435,433 km (0.076 R)
• M75: 38,504,697 km (0.09 R)
• M76: 39,688,913 km (0.118 R)
• M77: 40,461,586 km (0.083 R)
• M78: 41,026,618 km (0.082 R)
• M79: 41,239,196 km (0.082 R)
• M80: 42,164,459 km (0.073 R)
• M81: 42,307,475 km (0.073 R)
• M82: 43,096,603 km (0.057 R)
• M83: 43,818,264 km (0.117 R)
• M84: 44,253,294 km (0.063 R)
• M85: 45,566,614 km (0.078 R)
• M86: 47,486,104 km (0.074 R)
• M87: 47,932,953 km (0.059 R)
• M88: 48,980,736 km (0.1 R)
• M89: 50,111,696 km (0.088 R)
• M90: 50,414,782 km (0.099 R)
• M91: 50,566,474 km (0.107 R)

Planet 9 - Ice Giant

Semi-Major Axis: 15.11 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 527.7

Radius: 6

Gravity: 14.66 G

Time & Orbit

Eccentricity (e): 0.088

Orbit Range: 13.78 AU - 16.44 AU

Year: 21895 Days

Day: 18.5 Hours

Environment

Temp: -196 °C

Axial Tilt: 14.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 74,091,180 km

• M1: 283,937 km (0.061 R)
• M2: 421,417 km (0.038 R)
• M3: 580,141 km (0.107 R)
• M4: 1,055,413 km (0.098 R)
• M5: 1,162,375 km (0.076 R)
• M6: 1,780,963 km (0.109 R)
• M7: 2,073,127 km (0.084 R)
• M8: 2,276,132 km (0.082 R)
• M9: 2,557,076 km (0.107 R)
• M10: 2,738,239 km (0.041 R)
• M11: 3,112,982 km (0.113 R)
• M12: 3,624,308 km (0.055 R)
• M13: 3,786,920 km (0.116 R)
• M14: 4,077,140 km (0.064 R)
• M15: 4,119,177 km (0.118 R)
• M16: 4,288,821 km (0.109 R)
• M17: 5,125,971 km (0.057 R)
• M18: 5,354,407 km (0.091 R)
• M19: 5,446,858 km (0.096 R)
• M20: 5,633,108 km (0.069 R)
• M21: 6,794,436 km (0.08 R)
• M22: 7,146,739 km (0.082 R)
• M23: 7,401,953 km (0.086 R)
• M24: 7,608,398 km (0.117 R)
• M25: 8,345,616 km (0.039 R)
• M26: 8,614,444 km (0.041 R)
• M27: 9,382,330 km (0.113 R)
• M28: 9,493,780 km (0.097 R)
• M29: 9,887,372 km (0.111 R)
• M30: 10,690,413 km (0.101 R)
• M31: 11,813,594 km (0.111 R)
• M32: 11,934,021 km (0.091 R)
• M33: 15,138,706 km (0.103 R)
• M34: 16,195,615 km (0.07 R)
• M35: 16,665,502 km (0.057 R)
• M36: 18,869,827 km (0.066 R)
• M37: 19,934,215 km (0.098 R)
• M38: 20,582,124 km (0.108 R)
• M39: 22,120,738 km (0.079 R)
• M40: 22,791,385 km (0.09 R)
• M41: 23,771,850 km (0.09 R)
• M42: 26,086,577 km (0.05 R)
• M43: 26,164,967 km (0.083 R)
• M44: 26,243,356 km (0.09 R)
• M45: 26,321,895 km (0.114 R)
• M46: 27,350,231 km (0.116 R)
• M47: 29,364,117 km (0.065 R)
• M48: 29,527,329 km (0.119 R)
• M49: 30,430,152 km (0.067 R)
• M50: 31,092,421 km (0.096 R)
• M51: 34,131,053 km (0.098 R)
• M52: 34,216,773 km (0.049 R)
• M53: 34,388,511 km (0.091 R)
• M54: 34,646,568 km (0.083 R)
• M55: 34,991,690 km (0.111 R)
• M56: 35,338,009 km (0.08 R)
• M57: 35,511,543 km (0.059 R)
• M58: 35,772,441 km (0.111 R)
• M59: 35,859,507 km (0.072 R)
• M60: 36,558,877 km (0.114 R)
• M61: 36,646,691 km (0.094 R)
• M62: 36,910,283 km (0.091 R)
• M63: 37,704,947 km (0.053 R)
• M64: 38,683,915 km (0.095 R)
• M65: 39,761,319 km (0.052 R)
• M66: 39,941,883 km (0.1 R)
• M67: 42,405,611 km (0.086 R)
• M68: 42,589,915 km (0.085 R)
• M69: 44,636,414 km (0.061 R)
• M70: 45,482,839 km (0.074 R)
• M71: 45,766,177 km (0.102 R)
• M72: 46,524,489 km (0.08 R)
• M73: 48,149,720 km (0.061 R)
• M74: 48,631,276 km (0.066 R)
• M75: 49,502,085 km (0.11 R)
• M76: 49,696,413 km (0.042 R)
• M77: 51,455,684 km (0.072 R)
• M78: 51,652,405 km (0.116 R)
• M79: 51,849,425 km (0.117 R)
• M80: 53,633,529 km (0.105 R)
• M81: 55,437,680 km (0.114 R)
• M82: 55,740,316 km (0.098 R)
• M83: 57,363,453 km (0.076 R)
• M84: 61,072,134 km (0.066 R)
• M85: 62,640,219 km (0.102 R)
• M86: 62,955,422 km (0.081 R)
• M87: 63,692,789 km (0.111 R)
• M88: 63,798,406 km (0.112 R)
• M89: 69,694,955 km (0.059 R)
• M90: 71,771,972 km (0.101 R)
• M91: 72,211,790 km (0.08 R)
• M92: 72,873,312 km (0.101 R)

Kuiper Belt

Range: 30 - 46 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 171 - 14,993 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit