🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.1 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.29

Radius: 1.39

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.213

Orbit Range: 0.87 AU - 1.33 AU

Year: 432 Days

Day: 44.3 Hours

Environment

Temp: -1 °C

Axial Tilt: 35.7 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 2 - Terrestrial

Semi-Major Axis: 3.45 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.51

Radius: 1.18

Gravity: 1.08 G

Time & Orbit

Eccentricity (e): 0.05

Orbit Range: 3.28 AU - 3.62 AU

Year: 2401 Days

Day: 35.8 Hours

Environment

Temp: -123 °C

Axial Tilt: 76.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 54,485,909 km

• M1: 1,050,177 km (0.106 R)
• M2: 1,193,492 km (0.059 R)

Planet 3 - Terrestrial

Semi-Major Axis: 3.76 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.02

Radius: 1.01

Gravity: 1 G

Time & Orbit

Eccentricity (e): 0.081

Orbit Range: 3.46 AU - 4.06 AU

Year: 2732 Days

Day: 39.3 Hours

Environment

Temp: -129 °C

Axial Tilt: 35.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 4.74 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 694.9

Radius: 12.1

Gravity: 4.75 G

Time & Orbit

Eccentricity (e): 0.094

Orbit Range: 4.29 AU - 5.19 AU

Year: 3867 Days

Day: 13.5 Hours

Environment

Temp: -148 °C

Axial Tilt: 8.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 54,485,909 km

• M1: 156,928 km (0.114 R)
• M2: 309,817 km (0.064 R)
• M3: 401,221 km (0.115 R)
• M4: 496,366 km (0.114 R)
• M5: 1,103,135 km (0.048 R)
• M6: 1,233,434 km (0.116 R)
• M7: 2,205,671 km (0.053 R)
• M8: 2,543,912 km (0.114 R)
• M9: 2,772,946 km (0.091 R)
• M10: 3,082,763 km (0.088 R)
• M11: 3,327,206 km (0.116 R)
• M12: 4,037,647 km (0.118 R)
• M13: 4,160,616 km (0.095 R)
• M14: 4,243,194 km (0.104 R)
• M15: 4,326,520 km (0.05 R)
• M16: 4,880,930 km (0.119 R)
• M17: 5,012,127 km (0.105 R)
• M18: 5,255,672 km (0.033 R)
• M19: 5,731,693 km (0.106 R)
• M20: 5,939,933 km (0.048 R)
• M21: 6,150,716 km (0.111 R)
• M22: 6,628,083 km (0.058 R)
• M23: 6,846,795 km (0.09 R)
• M24: 7,142,251 km (0.098 R)
• M25: 7,618,571 km (0.104 R)
• M26: 8,131,093 km (0.104 R)
• M27: 8,602,027 km (0.093 R)
• M28: 8,867,563 km (0.114 R)
• M29: 9,543,147 km (0.119 R)
• M30: 10,347,535 km (0.102 R)
• M31: 10,629,976 km (0.049 R)
• M32: 10,715,247 km (0.103 R)
• M33: 10,800,667 km (0.111 R)
• M34: 11,932,375 km (0.042 R)
• M35: 12,407,647 km (0.118 R)
• M36: 12,768,178 km (0.107 R)
• M37: 13,162,518 km (0.087 R)
• M38: 13,284,740 km (0.092 R)
• M39: 13,622,681 km (0.088 R)
• M40: 13,746,249 km (0.067 R)
• M41: 14,401,338 km (0.11 R)
• M42: 14,780,270 km (0.114 R)
• M43: 15,002,722 km (0.082 R)
• M44: 15,226,370 km (0.081 R)
• M45: 15,322,562 km (0.115 R)
• M46: 15,547,856 km (0.108 R)
• M47: 15,936,512 km (0.112 R)
• M48: 16,099,424 km (0.033 R)
• M49: 16,525,628 km (0.038 R)
• M50: 16,822,879 km (0.109 R)
• M51: 17,222,006 km (0.07 R)
• M52: 17,860,191 km (0.083 R)
• M53: 18,437,788 km (0.102 R)
• M54: 18,746,109 km (0.072 R)
• M55: 19,056,226 km (0.092 R)
• M56: 19,229,161 km (0.118 R)
• M57: 19,681,245 km (0.029 R)
• M58: 20,101,765 km (0.061 R)
• M59: 20,525,277 km (0.097 R)
• M60: 21,094,497 km (0.113 R)
• M61: 21,309,319 km (0.083 R)
• M62: 21,813,464 km (0.104 R)
• M63: 22,103,235 km (0.113 R)
• M64: 22,503,708 km (0.091 R)
• M65: 22,686,667 km (0.114 R)
• M66: 23,090,731 km (0.034 R)
• M67: 23,682,689 km (0.113 R)
• M68: 23,906,039 km (0.1 R)
• M69: 24,017,938 km (0.047 R)
• M70: 25,070,808 km (0.116 R)
• M71: 25,488,485 km (0.088 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.85 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 576.6

Radius: 14.8

Gravity: 2.63 G

Time & Orbit

Eccentricity (e): 0.153

Orbit Range: 4.11 AU - 5.59 AU

Year: 4003 Days

Day: 10.2 Hours

Environment

Temp: -143 °C

Axial Tilt: 23.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 54,485,909 km

• M1: 242,947 km (0.078 R)
• M2: 386,561 km (0.111 R)
• M3: 490,232 km (0.098 R)
• M4: 616,642 km (0.105 R)
• M5: 746,493 km (0.075 R)
• M6: 955,482 km (0.114 R)
• M7: 1,074,113 km (0.03 R)
• M8: 1,223,711 km (0.103 R)
• M9: 1,407,566 km (0.114 R)
• M10: 1,503,309 km (0.094 R)
• M11: 1,939,536 km (0.116 R)
• M12: 2,284,808 km (0.103 R)
• M13: 2,599,263 km (0.083 R)
• M14: 2,770,403 km (0.107 R)
• M15: 3,288,610 km (0.048 R)
• M16: 3,493,260 km (0.097 R)
• M17: 3,683,100 km (0.027 R)
• M18: 3,895,977 km (0.115 R)
• M19: 4,033,458 km (0.095 R)
• M20: 4,497,211 km (0.1 R)
• M21: 4,704,105 km (0.113 R)
• M22: 4,935,533 km (0.115 R)
• M23: 5,696,986 km (0.097 R)
• M24: 5,876,354 km (0.06 R)
• M25: 5,989,300 km (0.11 R)
• M26: 6,355,965 km (0.092 R)
• M27: 6,448,715 km (0.058 R)
• M28: 6,848,291 km (0.094 R)
• M29: 7,280,180 km (0.074 R)
• M30: 7,548,559 km (0.039 R)
• M31: 7,721,045 km (0.103 R)
• M32: 8,221,151 km (0.073 R)
• M33: 8,654,686 km (0.092 R)
• M34: 8,887,161 km (0.096 R)
• M35: 9,200,568 km (0.114 R)
• M36: 9,490,938 km (0.073 R)
• M37: 9,597,302 km (0.104 R)
• M38: 9,972,643 km (0.095 R)
• M39: 10,271,091 km (0.082 R)
• M40: 10,655,108 km (0.072 R)
• M41: 10,765,811 km (0.078 R)
• M42: 10,960,288 km (0.041 R)
• M43: 11,324,559 km (0.057 R)
• M44: 11,721,442 km (0.103 R)
• M45: 12,470,628 km (0.092 R)
• M46: 13,384,073 km (0.116 R)
• M47: 13,833,913 km (0.115 R)
• M48: 14,871,973 km (0.113 R)
• M49: 15,651,228 km (0.063 R)
• M50: 15,777,040 km (0.112 R)
• M51: 15,998,295 km (0.062 R)
• M52: 16,443,648 km (0.066 R)
• M53: 17,087,218 km (0.081 R)
• M54: 17,509,832 km (0.098 R)
• M55: 17,968,948 km (0.081 R)
• M56: 18,266,199 km (0.096 R)
• M57: 18,465,314 km (0.098 R)
• M58: 18,698,387 km (0.098 R)
• M59: 19,100,507 km (0.064 R)
• M60: 19,471,509 km (0.053 R)
• M61: 19,742,730 km (0.054 R)
• M62: 19,878,864 km (0.103 R)
• M63: 20,392,284 km (0.091 R)
• M64: 21,502,001 km (0.096 R)
• M65: 21,607,019 km (0.108 R)
• M66: 22,311,625 km (0.1 R)
• M67: 22,845,091 km (0.097 R)
• M68: 23,059,614 km (0.084 R)
• M69: 23,310,789 km (0.1 R)
• M70: 23,779,778 km (0.106 R)
• M71: 24,215,407 km (0.044 R)
• M72: 24,470,621 km (0.066 R)

Planet 6 - Gas Giant

Semi-Major Axis: 7.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 206.1

Radius: 12.7

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.141

Orbit Range: 6.85 AU - 9.11 AU

Year: 8448 Days

Day: 11.8 Hours

Environment

Temp: -160 °C

Axial Tilt: 33.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 54,485,909 km

• M1: 167,998 km (0.072 R)
• M2: 1,074,113 km (0.029 R)
• M3: 1,171,052 km (0.079 R)
• M4: 1,300,305 km (0.052 R)
• M5: 1,434,644 km (0.119 R)
• M6: 1,542,504 km (0.097 R)
• M7: 1,882,988 km (0.064 R)
• M8: 2,540,621 km (0.118 R)
• M9: 2,691,864 km (0.066 R)
• M10: 3,833,595 km (0.059 R)
• M11: 3,985,886 km (0.057 R)
• M12: 4,274,310 km (0.089 R)
• M13: 4,661,918 km (0.041 R)
• M14: 5,276,616 km (0.068 R)
• M15: 5,471,093 km (0.104 R)
• M16: 6,017,874 km (0.119 R)
• M17: 6,349,233 km (0.039 R)
• M18: 6,478,336 km (0.076 R)
• M19: 7,244,127 km (0.108 R)
• M20: 8,010,816 km (0.115 R)
• M21: 8,488,931 km (0.084 R)
• M22: 8,688,644 km (0.076 R)
• M23: 8,889,704 km (0.105 R)
• M24: 9,296,760 km (0.067 R)
• M25: 9,384,723 km (0.106 R)
• M26: 9,502,606 km (0.114 R)
• M27: 9,591,168 km (0.099 R)
• M28: 9,978,627 km (0.11 R)
• M29: 10,219,629 km (0.067 R)
• M30: 10,340,953 km (0.115 R)
• M31: 10,707,468 km (0.099 R)
• M32: 11,047,204 km (0.108 R)
• M33: 11,359,266 km (0.094 R)
• M34: 11,642,604 km (0.066 R)
• M35: 11,992,065 km (0.114 R)
• M36: 12,087,957 km (0.116 R)
• M37: 12,701,308 km (0.058 R)
• M38: 12,995,417 km (0.065 R)
• M39: 13,225,649 km (0.106 R)
• M40: 13,457,376 km (0.077 R)
• M41: 13,590,368 km (0.091 R)
• M42: 13,757,170 km (0.109 R)
• M43: 14,093,017 km (0.118 R)
• M44: 15,289,501 km (0.117 R)
• M45: 15,602,460 km (0.061 R)
• M46: 15,917,513 km (0.052 R)
• M47: 16,022,979 km (0.028 R)
• M48: 16,660,864 km (0.116 R)
• M49: 17,162,765 km (0.04 R)
• M50: 17,343,180 km (0.107 R)
• M51: 17,815,311 km (0.073 R)
• M52: 18,402,184 km (0.075 R)
• M53: 18,513,036 km (0.071 R)
• M54: 18,698,088 km (0.037 R)
• M55: 18,809,389 km (0.112 R)
• M56: 19,407,033 km (0.044 R)
• M57: 21,625,419 km (0.069 R)
• M58: 22,172,798 km (0.088 R)
• M59: 22,606,033 km (0.117 R)
• M60: 22,962,675 km (0.049 R)
• M61: 23,681,642 km (0.097 R)
• M62: 24,733,016 km (0.116 R)
• M63: 25,634,493 km (0.098 R)
• M64: 25,964,954 km (0.05 R)
• M65: 26,047,832 km (0.113 R)
• M66: 26,380,089 km (0.072 R)
• M67: 26,463,415 km (0.091 R)
• M68: 26,546,741 km (0.073 R)
• M69: 27,090,828 km (0.099 R)
• M70: 27,258,976 km (0.109 R)
• M71: 27,765,664 km (0.116 R)
• M72: 28,062,466 km (0.062 R)
• M73: 28,531,306 km (0.107 R)
• M74: 28,702,446 km (0.043 R)

Asteroid Belt

Center: 9.92 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 7 - Gas Giant

Semi-Major Axis: 11.85 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 798.4

Radius: 8.2

Gravity: 11.87 G

Time & Orbit

Eccentricity (e): 0.144

Orbit Range: 10.14 AU - 13.56 AU

Year: 15286 Days

Day: 9.5 Hours

Environment

Temp: -188 °C

Axial Tilt: 37.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 54,485,909 km

• M1: 168,746 km (0.102 R)
• M2: 250,128 km (0.042 R)
• M3: 484,548 km (0.092 R)
• M4: 964,158 km (0.119 R)
• M5: 1,084,285 km (0.077 R)
• M6: 1,817,165 km (0.111 R)
• M7: 2,247,409 km (0.089 R)
• M8: 2,311,437 km (0.118 R)
• M9: 2,573,682 km (0.076 R)
• M10: 3,162,798 km (0.076 R)
• M11: 3,343,812 km (0.108 R)
• M12: 3,907,496 km (0.116 R)
• M13: 4,101,974 km (0.116 R)
• M14: 4,419,719 km (0.081 R)
• M15: 4,994,923 km (0.12 R)
• M16: 5,291,426 km (0.095 R)
• M17: 5,420,380 km (0.073 R)
• M18: 5,550,231 km (0.117 R)
• M19: 5,768,943 km (0.101 R)
• M20: 5,990,647 km (0.114 R)
• M21: 6,305,700 km (0.094 R)
• M22: 6,765,115 km (0.089 R)
• M23: 6,904,989 km (0.037 R)
• M24: 7,716,109 km (0.066 R)
• M25: 7,960,402 km (0.116 R)
• M26: 11,582,316 km (0.109 R)
• M27: 11,862,064 km (0.088 R)
• M28: 12,200,754 km (0.105 R)
• M29: 12,485,438 km (0.081 R)
• M30: 13,352,657 km (0.045 R)
• M31: 13,763,902 km (0.114 R)
• M32: 13,822,993 km (0.08 R)
• M33: 14,298,864 km (0.079 R)
• M34: 14,598,957 km (0.044 R)
• M35: 15,758,490 km (0.103 R)
• M36: 15,882,208 km (0.12 R)
• M37: 15,944,291 km (0.061 R)
• M38: 16,006,374 km (0.113 R)
• M39: 16,317,986 km (0.068 R)
• M40: 16,757,654 km (0.074 R)
• M41: 17,201,212 km (0.099 R)
• M42: 17,456,426 km (0.055 R)
• M43: 17,905,968 km (0.116 R)
• M44: 18,099,846 km (0.066 R)
• M45: 18,424,623 km (0.114 R)
• M46: 19,942,743 km (0.083 R)
• M47: 20,480,248 km (0.068 R)
• M48: 21,844,580 km (0.036 R)
• M49: 23,379,006 km (0.081 R)
• M50: 23,590,836 km (0.104 R)
• M51: 24,660,012 km (0.115 R)
• M52: 24,803,776 km (0.079 R)
• M53: 25,526,782 km (0.103 R)
• M54: 26,036,911 km (0.081 R)
• M55: 26,550,480 km (0.107 R)
• M56: 28,036,137 km (0.083 R)
• M57: 29,092,148 km (0.077 R)
• M58: 29,625,016 km (0.057 R)
• M59: 29,930,944 km (0.082 R)
• M60: 30,932,501 km (0.074 R)
• M61: 31,087,485 km (0.109 R)
• M62: 31,632,171 km (0.077 R)
• M63: 32,731,117 km (0.117 R)
• M64: 34,483,207 km (0.056 R)
• M65: 34,724,508 km (0.111 R)
• M66: 34,966,258 km (0.093 R)
• M67: 36,102,305 km (0.113 R)
• M68: 37,745,936 km (0.039 R)
• M69: 38,410,151 km (0.107 R)
• M70: 39,666,175 km (0.063 R)
• M71: 40,003,368 km (0.106 R)
• M72: 41,617,978 km (0.101 R)
• M73: 42,304,183 km (0.078 R)
• M74: 42,562,539 km (0.06 R)
• M75: 42,821,343 km (0.081 R)
• M76: 44,472,605 km (0.105 R)
• M77: 44,560,119 km (0.084 R)
• M78: 44,735,298 km (0.078 R)
• M79: 45,526,222 km (0.106 R)
• M80: 46,144,660 km (0.061 R)
• M81: 48,555,878 km (0.111 R)
• M82: 49,459,300 km (0.094 R)
• M83: 50,277,152 km (0.092 R)
• M84: 52,294,928 km (0.113 R)
• M85: 52,757,335 km (0.106 R)
• M86: 52,942,537 km (0.098 R)
• M87: 53,313,839 km (0.113 R)
• M88: 56,504,163 km (0.106 R)
• M89: 57,740,290 km (0.094 R)
• M90: 58,793,160 km (0.033 R)
• M91: 60,335,963 km (0.073 R)
• M92: 61,404,241 km (0.115 R)
• M93: 61,989,618 km (0.108 R)
• M94: 62,969,334 km (0.066 R)
• M95: 64,151,756 km (0.088 R)
• M96: 65,640,105 km (0.06 R)
• M97: 66,939,213 km (0.093 R)

Planet 8 - Ice Giant

Semi-Major Axis: 13.77 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 274.4

Radius: 3.2

Gravity: 26.8 G

Time & Orbit

Eccentricity (e): 0.171

Orbit Range: 11.42 AU - 16.12 AU

Year: 19148 Days

Day: 21.6 Hours

Environment

Temp: -194 °C

Axial Tilt: 15.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 54,485,909 km

• M1: 41,588 km (0.096 R)
• M2: 160,519 km (0.112 R)
• M3: 229,782 km (0.05 R)
• M4: 900,729 km (0.034 R)
• M5: 984,055 km (0.113 R)
• M6: 1,048,083 km (0.12 R)
• M7: 1,091,616 km (0.06 R)
• M8: 1,158,037 km (0.091 R)
• M9: 1,318,256 km (0.047 R)
• M10: 1,608,925 km (0.112 R)
• M11: 1,659,340 km (0.083 R)
• M12: 2,026,154 km (0.079 R)
• M13: 2,770,553 km (0.103 R)
• M14: 2,830,990 km (0.117 R)
• M15: 2,861,358 km (0.106 R)
• M16: 3,394,525 km (0.107 R)
• M17: 3,788,865 km (0.119 R)
• M18: 4,584,576 km (0.103 R)
• M19: 4,728,190 km (0.055 R)
• M20: 5,019,607 km (0.069 R)
• M21: 5,056,408 km (0.089 R)
• M22: 5,354,407 km (0.105 R)
• M23: 5,543,499 km (0.077 R)
• M24: 6,242,270 km (0.053 R)
• M25: 6,481,328 km (0.076 R)
• M26: 6,804,758 km (0.112 R)
• M27: 6,845,599 km (0.112 R)
• M28: 6,927,429 km (0.091 R)
• M29: 7,091,986 km (0.1 R)
• M30: 7,257,890 km (0.093 R)
• M31: 7,425,141 km (0.116 R)
• M32: 7,891,587 km (0.098 R)
• M33: 8,106,709 km (0.035 R)
• M34: 8,586,619 km (0.088 R)
• M35: 9,437,232 km (0.063 R)
• M36: 12,293,504 km (0.091 R)
• M37: 13,198,571 km (0.072 R)
• M38: 13,249,435 km (0.025 R)
• M39: 14,176,792 km (0.078 R)
• M40: 15,552,943 km (0.114 R)
• M41: 15,876,523 km (0.118 R)
• M42: 16,694,973 km (0.113 R)
• M43: 16,915,630 km (0.067 R)
• M44: 17,639,235 km (0.071 R)
• M45: 17,863,931 km (0.074 R)
• M46: 18,202,620 km (0.081 R)
• M47: 18,600,550 km (0.067 R)
• M48: 18,886,582 km (0.1 R)
• M49: 19,173,959 km (0.098 R)
• M50: 19,405,088 km (0.098 R)
• M51: 19,986,575 km (0.06 R)
• M52: 20,279,487 km (0.096 R)
• M53: 20,691,929 km (0.076 R)
• M54: 21,525,039 km (0.092 R)
• M55: 22,187,309 km (0.046 R)
• M56: 22,429,807 km (0.07 R)
• M57: 22,612,317 km (0.038 R)
• M58: 22,734,239 km (0.044 R)
• M59: 23,593,529 km (0.066 R)
• M60: 26,170,951 km (0.1 R)
• M61: 26,684,071 km (0.068 R)
• M62: 26,812,875 km (0.099 R)
• M63: 27,265,409 km (0.118 R)
• M64: 27,785,710 km (0.053 R)
• M65: 28,968,132 km (0.092 R)
• M66: 29,632,047 km (0.093 R)
• M67: 33,164,651 km (0.056 R)
• M68: 34,068,372 km (0.047 R)
• M69: 34,208,096 km (0.055 R)
• M70: 35,686,871 km (0.084 R)
• M71: 36,255,642 km (0.062 R)
• M72: 36,827,555 km (0.083 R)
• M73: 37,474,416 km (0.048 R)
• M74: 37,618,629 km (0.102 R)
• M75: 37,980,057 km (0.04 R)
• M76: 38,052,462 km (0.093 R)
• M77: 38,925,216 km (0.076 R)
• M78: 39,144,377 km (0.088 R)
• M79: 39,584,045 km (0.05 R)
• M80: 40,542,220 km (0.073 R)
• M81: 41,582,673 km (0.113 R)
• M82: 42,933,243 km (0.113 R)
• M83: 43,084,187 km (0.12 R)
• M84: 44,069,588 km (0.063 R)
• M85: 45,677,017 km (0.064 R)
• M86: 49,027,860 km (0.063 R)
• M87: 49,106,847 km (0.046 R)
• M88: 49,818,485 km (0.118 R)
• M89: 49,977,058 km (0.112 R)
• M90: 51,092,011 km (0.079 R)
• M91: 52,295,825 km (0.1 R)
• M92: 53,427,683 km (0.114 R)
• M93: 54,241,046 km (0.083 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 333 - 20,152 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit