🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.22

Radius: 1.08

Gravity: 1.05 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 0.51 AU - 0.69 AU

Year: 300 Days

Day: 24.7 Hours

Environment

Temp: -123 °C

Axial Tilt: 20.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.61 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.55

Radius: 1.83

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.195

Orbit Range: 0.49 AU - 0.73 AU

Year: 308 Days

Day: 33.5 Hours

Environment

Temp: -136 °C

Axial Tilt: 27.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 64,906,778 km

• M1: 310,565 km (0.085 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 958.8

Radius: 14.5

Gravity: 4.56 G

Time & Orbit

Eccentricity (e): 0.059

Orbit Range: 0.83 AU - 0.93 AU

Year: 533 Days

Day: 7 Hours

Environment

Temp: -162 °C

Axial Tilt: 13.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 64,906,778 km

• M1: 185,651 km (0.118 R)
• M2: 341,831 km (0.081 R)
• M3: 436,227 km (0.092 R)
• M4: 535,860 km (0.105 R)
• M5: 628,311 km (0.113 R)
• M6: 765,492 km (0.11 R)
• M7: 909,106 km (0.078 R)
• M8: 1,035,666 km (0.084 R)
• M9: 1,157,588 km (0.046 R)
• M10: 1,266,944 km (0.111 R)
• M11: 1,553,873 km (0.081 R)
• M12: 1,695,692 km (0.099 R)
• M13: 1,848,880 km (0.082 R)
• M14: 2,105,291 km (0.119 R)
• M15: 2,227,213 km (0.117 R)
• M16: 2,351,529 km (0.073 R)
• M17: 2,463,129 km (0.072 R)
• M18: 2,645,788 km (0.068 R)
• M19: 2,801,519 km (0.081 R)
• M20: 3,000,484 km (0.12 R)
• M21: 3,114,029 km (0.098 R)
• M22: 3,362,362 km (0.094 R)
• M23: 3,643,157 km (0.106 R)
• M24: 3,914,079 km (0.114 R)
• M25: 4,011,766 km (0.106 R)
• M26: 4,401,917 km (0.094 R)
• M27: 4,503,644 km (0.111 R)
• M28: 4,690,791 km (0.103 R)
• M29: 4,842,333 km (0.055 R)
• M30: 4,957,225 km (0.098 R)
• M31: 5,053,566 km (0.092 R)
• M32: 5,248,192 km (0.077 R)
• M33: 5,385,972 km (0.089 R)
• M34: 5,625,030 km (0.065 R)
• M35: 6,041,510 km (0.063 R)
• M36: 6,227,610 km (0.096 R)
• M37: 6,384,089 km (0.112 R)
• M38: 6,658,452 km (0.111 R)
• M39: 6,829,442 km (0.11 R)
• M40: 7,001,629 km (0.099 R)
• M41: 7,394,772 km (0.081 R)
• M42: 7,594,037 km (0.072 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 273.1

Radius: 8.4

Gravity: 3.87 G

Time & Orbit

Eccentricity (e): 0.062

Orbit Range: 0.98 AU - 1.12 AU

Year: 695 Days

Day: 8.5 Hours

Environment

Temp: -171 °C

Axial Tilt: 18.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 64,906,778 km

• M1: 105,018 km (0.088 R)
• M2: 194,926 km (0.088 R)
• M3: 260,001 km (0.078 R)
• M4: 347,965 km (0.052 R)
• M5: 417,827 km (0.11 R)
• M6: 497,114 km (0.084 R)
• M7: 585,676 km (0.086 R)
• M8: 648,058 km (0.039 R)
• M9: 708,944 km (0.09 R)
• M10: 797,506 km (0.093 R)
• M11: 944,561 km (0.087 R)
• M12: 1,062,145 km (0.053 R)
• M13: 1,164,769 km (0.095 R)
• M14: 1,235,080 km (0.093 R)
• M15: 1,369,718 km (0.099 R)
• M16: 1,520,064 km (0.108 R)
• M17: 1,575,116 km (0.082 R)
• M18: 1,687,464 km (0.08 R)
• M19: 1,755,980 km (0.089 R)
• M20: 1,973,794 km (0.064 R)
• M21: 2,046,200 km (0.115 R)
• M22: 2,138,202 km (0.066 R)
• M23: 2,225,268 km (0.097 R)
• M24: 2,332,530 km (0.119 R)
• M25: 2,435,154 km (0.033 R)
• M26: 2,611,829 km (0.116 R)
• M27: 2,705,178 km (0.114 R)
• M28: 2,840,265 km (0.083 R)
• M29: 2,901,899 km (0.099 R)
• M30: 3,054,340 km (0.092 R)
• M31: 3,174,018 km (0.086 R)
• M32: 3,259,438 km (0.109 R)
• M33: 3,520,187 km (0.117 R)
• M34: 3,579,129 km (0.11 R)
• M35: 3,735,309 km (0.117 R)
• M36: 3,931,731 km (0.103 R)
• M37: 4,046,622 km (0.065 R)
• M38: 4,162,710 km (0.071 R)
• M39: 4,335,047 km (0.079 R)
• M40: 4,390,249 km (0.043 R)
• M41: 4,501,550 km (0.105 R)
• M42: 4,694,680 km (0.119 R)
• M43: 4,923,266 km (0.096 R)
• M44: 5,130,609 km (0.087 R)
• M45: 5,231,138 km (0.09 R)
• M46: 5,323,739 km (0.104 R)
• M47: 5,383,130 km (0.117 R)
• M48: 5,442,670 km (0.065 R)
• M49: 5,613,959 km (0.102 R)
• M50: 5,743,511 km (0.099 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.32 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 145.6

Radius: 10.4

Gravity: 1.35 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 1.09 AU - 1.55 AU

Year: 979 Days

Day: 9.2 Hours

Environment

Temp: -180 °C

Axial Tilt: 7.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (44)

Outer Limit: 64,906,778 km

• M1: 130,300 km (0.071 R)
• M2: 239,506 km (0.031 R)
• M3: 320,289 km (0.067 R)
• M4: 474,824 km (0.046 R)
• M5: 621,878 km (0.063 R)
• M6: 718,219 km (0.036 R)
• M7: 922,420 km (0.105 R)
• M8: 1,106,725 km (0.113 R)
• M9: 1,195,885 km (0.094 R)
• M10: 1,319,004 km (0.058 R)
• M11: 1,451,698 km (0.086 R)
• M12: 1,572,423 km (0.073 R)
• M13: 1,656,647 km (0.089 R)
• M14: 1,765,704 km (0.089 R)
• M15: 1,853,518 km (0.081 R)
• M16: 2,021,366 km (0.087 R)
• M17: 2,188,168 km (0.075 R)
• M18: 2,270,148 km (0.037 R)
• M19: 2,340,459 km (0.113 R)
• M20: 2,456,846 km (0.037 R)
• M21: 2,575,327 km (0.107 R)
• M22: 2,675,558 km (0.12 R)
• M23: 2,783,867 km (0.077 R)
• M24: 3,012,004 km (0.069 R)
• M25: 3,139,012 km (0.079 R)
• M26: 3,253,454 km (0.094 R)
• M27: 3,391,234 km (0.063 R)
• M28: 3,472,017 km (0.094 R)
• M29: 3,710,326 km (0.073 R)
• M30: 3,801,132 km (0.083 R)
• M31: 3,923,354 km (0.112 R)
• M32: 4,039,143 km (0.08 R)
• M33: 4,171,686 km (0.084 R)
• M34: 4,297,797 km (0.036 R)
• M35: 4,393,241 km (0.103 R)
• M36: 4,513,667 km (0.095 R)
• M37: 4,757,661 km (0.077 R)
• M38: 4,839,940 km (0.114 R)
• M39: 4,906,062 km (0.056 R)
• M40: 5,420,828 km (0.112 R)
• M41: 5,541,404 km (0.096 R)
• M42: 5,636,848 km (0.11 R)
• M43: 5,741,417 km (0.08 R)
• M44: 5,979,427 km (0.092 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.46 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 166.6

Radius: 3.2

Gravity: 16.27 G

Time & Orbit

Eccentricity (e): 0.116

Orbit Range: 6.59 AU - 8.33 AU

Year: 13156 Days

Day: 19 Hours

Environment

Temp: -230 °C

Axial Tilt: 20.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 64,906,778 km

• M1: 65,524 km (0.074 R)
• M2: 86,916 km (0.102 R)
• M3: 119,379 km (0.092 R)
• M4: 156,928 km (0.091 R)
• M5: 295,157 km (0.086 R)
• M6: 348,713 km (0.091 R)
• M7: 382,372 km (0.032 R)
• M8: 580,440 km (0.047 R)
• M9: 607,218 km (0.111 R)
• M10: 867,069 km (0.085 R)
• M11: 1,073,963 km (0.092 R)
• M12: 1,174,493 km (0.097 R)
• M13: 1,550,133 km (0.095 R)
• M14: 1,683,126 km (0.067 R)
• M15: 1,839,455 km (0.09 R)
• M16: 2,208,364 km (0.092 R)
• M17: 2,272,092 km (0.114 R)
• M18: 2,444,878 km (0.061 R)
• M19: 2,621,852 km (0.072 R)
• M20: 2,918,355 km (0.113 R)
• M21: 3,394,824 km (0.065 R)
• M22: 3,517,644 km (0.086 R)
• M23: 3,869,499 km (0.079 R)
• M24: 4,962,610 km (0.106 R)
• M25: 5,186,409 km (0.085 R)
• M26: 5,556,963 km (0.094 R)
• M27: 6,113,915 km (0.112 R)
• M28: 6,233,294 km (0.094 R)
• M29: 6,444,227 km (0.088 R)
• M30: 6,780,523 km (0.1 R)
• M31: 7,091,089 km (0.101 R)
• M32: 7,661,805 km (0.08 R)
• M33: 7,822,921 km (0.117 R)
• M34: 7,920,160 km (0.096 R)
• M35: 7,952,623 km (0.107 R)
• M36: 8,148,596 km (0.097 R)
• M37: 9,220,016 km (0.101 R)
• M38: 9,322,790 km (0.04 R)
• M39: 9,391,455 km (0.072 R)
• M40: 9,981,918 km (0.113 R)
• M41: 10,087,384 km (0.077 R)
• M42: 10,157,845 km (0.08 R)
• M43: 11,016,686 km (0.081 R)
• M44: 11,089,241 km (0.08 R)
• M45: 11,125,743 km (0.093 R)
• M46: 11,675,964 km (0.092 R)
• M47: 11,787,115 km (0.073 R)
• M48: 11,861,316 km (0.047 R)
• M49: 13,573,015 km (0.047 R)
• M50: 13,846,181 km (0.092 R)
• M51: 14,397,897 km (0.07 R)
• M52: 15,158,004 km (0.04 R)
• M53: 16,177,963 km (0.098 R)
• M54: 16,967,690 km (0.077 R)
• M55: 17,642,526 km (0.098 R)
• M56: 17,940,525 km (0.05 R)
• M57: 17,983,310 km (0.073 R)
• M58: 18,240,169 km (0.103 R)
• M59: 18,974,844 km (0.118 R)
• M60: 19,192,659 km (0.088 R)
• M61: 19,323,856 km (0.095 R)
• M62: 19,586,999 km (0.103 R)
• M63: 20,606,658 km (0.071 R)
• M64: 20,696,267 km (0.097 R)
• M65: 20,740,997 km (0.102 R)
• M66: 21,416,730 km (0.095 R)
• M67: 21,962,463 km (0.067 R)
• M68: 22,145,422 km (0.057 R)
• M69: 22,789,740 km (0.091 R)
• M70: 23,114,217 km (0.086 R)
• M71: 23,767,661 km (0.093 R)
• M72: 24,332,542 km (0.112 R)
• M73: 24,997,206 km (0.084 R)
• M74: 25,427,748 km (0.101 R)
• M75: 25,812,365 km (0.026 R)
• M76: 26,053,666 km (0.097 R)
• M77: 26,295,865 km (0.108 R)
• M78: 26,392,954 km (0.07 R)
• M79: 26,538,812 km (0.11 R)
• M80: 27,863,202 km (0.106 R)
• M81: 28,160,303 km (0.11 R)
• M82: 28,907,993 km (0.088 R)
• M83: 29,208,835 km (0.086 R)
• M84: 29,813,808 km (0.099 R)
• M85: 30,320,945 km (0.101 R)
• M86: 30,473,685 km (0.111 R)
• M87: 31,911,320 km (0.117 R)
• M88: 32,326,155 km (0.066 R)
• M89: 33,161,210 km (0.038 R)
• M90: 34,003,147 km (0.106 R)
• M91: 34,214,828 km (0.085 R)
• M92: 35,012,185 km (0.119 R)

Planet 7 - Ice Giant

Semi-Major Axis: 8.04 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 240.8

Radius: 7.7

Gravity: 4.06 G

Time & Orbit

Eccentricity (e): 0.026

Orbit Range: 7.83 AU - 8.25 AU

Year: 14720 Days

Day: 23.8 Hours

Environment

Temp: -234 °C

Axial Tilt: 6.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 64,906,778 km

• M1: 121,324 km (0.111 R)
• M2: 471,682 km (0.072 R)
• M3: 628,760 km (0.053 R)
• M4: 786,436 km (0.086 R)
• M5: 1,029,084 km (0.099 R)
• M6: 1,294,770 km (0.081 R)
• M7: 1,667,567 km (0.086 R)
• M8: 1,934,151 km (0.06 R)
• M9: 2,633,222 km (0.101 R)
• M10: 2,684,235 km (0.119 R)
• M11: 2,996,745 km (0.071 R)
• M12: 3,049,852 km (0.074 R)
• M13: 3,348,300 km (0.087 R)
• M14: 3,487,126 km (0.098 R)
• M15: 3,713,169 km (0.11 R)
• M16: 3,885,954 km (0.12 R)
• M17: 4,090,754 km (0.107 R)
• M18: 4,633,644 km (0.098 R)
• M19: 4,788,628 km (0.106 R)
• M20: 6,360,453 km (0.117 R)
• M21: 6,706,473 km (0.11 R)
• M22: 6,776,484 km (0.119 R)
• M23: 6,881,801 km (0.069 R)
• M24: 6,987,717 km (0.056 R)
• M25: 7,094,230 km (0.072 R)
• M26: 7,489,318 km (0.043 R)
• M27: 7,634,727 km (0.103 R)
• M28: 8,755,215 km (0.07 R)
• M29: 9,256,518 km (0.093 R)
• M30: 9,412,698 km (0.108 R)
• M31: 9,609,120 km (0.058 R)
• M32: 10,408,272 km (0.066 R)
• M33: 12,154,977 km (0.097 R)
• M34: 12,584,173 km (0.092 R)
• M35: 12,800,491 km (0.113 R)
• M36: 12,887,408 km (0.045 R)
• M37: 13,324,982 km (0.054 R)
• M38: 13,767,492 km (0.119 R)
• M39: 14,304,698 km (0.105 R)
• M40: 14,985,967 km (0.109 R)
• M41: 15,123,447 km (0.118 R)
• M42: 15,307,453 km (0.062 R)
• M43: 16,996,712 km (0.083 R)
• M44: 17,236,068 km (0.114 R)
• M45: 18,498,226 km (0.086 R)
• M46: 18,596,511 km (0.089 R)
• M47: 19,339,414 km (0.047 R)
• M48: 21,470,885 km (0.067 R)
• M49: 21,625,868 km (0.113 R)
• M50: 22,197,781 km (0.041 R)
• M51: 22,249,991 km (0.099 R)
• M52: 22,354,559 km (0.107 R)
• M53: 22,459,278 km (0.081 R)
• M54: 22,827,139 km (0.079 R)
• M55: 22,932,755 km (0.055 R)
• M56: 23,038,371 km (0.033 R)
• M57: 23,356,267 km (0.087 R)
• M58: 23,728,915 km (0.057 R)
• M59: 23,782,321 km (0.094 R)
• M60: 24,049,952 km (0.086 R)
• M61: 24,750,519 km (0.117 R)
• M62: 27,059,412 km (0.053 R)
• M63: 27,338,712 km (0.091 R)
• M64: 27,731,556 km (0.116 R)
• M65: 27,900,452 km (0.09 R)
• M66: 27,956,850 km (0.041 R)
• M67: 28,921,158 km (0.086 R)
• M68: 29,092,448 km (0.096 R)
• M69: 31,115,609 km (0.064 R)
• M70: 31,408,372 km (0.102 R)
• M71: 31,584,449 km (0.05 R)
• M72: 31,702,033 km (0.083 R)
• M73: 31,937,649 km (0.107 R)
• M74: 31,996,591 km (0.117 R)
• M75: 33,542,835 km (0.117 R)
• M76: 33,722,801 km (0.088 R)
• M77: 34,566,982 km (0.041 R)
• M78: 34,930,953 km (0.067 R)
• M79: 35,235,235 km (0.097 R)
• M80: 36,091,683 km (0.12 R)
• M81: 36,707,727 km (0.114 R)
• M82: 37,079,029 km (0.118 R)
• M83: 38,765,147 km (0.106 R)
• M84: 40,412,219 km (0.072 R)
• M85: 40,476,097 km (0.043 R)
• M86: 40,539,976 km (0.118 R)
• M87: 41,823,825 km (0.085 R)
• M88: 42,082,180 km (0.041 R)
• M89: 42,341,134 km (0.039 R)
• M90: 42,665,462 km (0.082 R)
• M91: 43,186,213 km (0.111 R)

Planet 8 - Ice Giant

Semi-Major Axis: 8.43 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 681

Radius: 5.8

Gravity: 20.24 G

Time & Orbit

Eccentricity (e): 0.043

Orbit Range: 8.07 AU - 8.79 AU

Year: 15804 Days

Day: 16.4 Hours

Environment

Temp: -237 °C

Axial Tilt: 35.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 64,906,778 km

• M1: 137,032 km (0.112 R)
• M2: 255,513 km (0.116 R)
• M3: 840,890 km (0.09 R)
• M4: 977,772 km (0.092 R)
• M5: 1,511,686 km (0.099 R)
• M6: 1,940,584 km (0.044 R)
• M7: 2,567,698 km (0.114 R)
• M8: 2,903,096 km (0.068 R)
• M9: 3,146,193 km (0.073 R)
• M10: 3,952,226 km (0.087 R)
• M11: 4,697,074 km (0.098 R)
• M12: 4,941,068 km (0.107 R)
• M13: 5,064,636 km (0.039 R)
• M14: 5,147,663 km (0.071 R)
• M15: 5,315,063 km (0.111 R)
• M16: 5,526,744 km (0.06 R)
• M17: 5,569,379 km (0.072 R)
• M18: 6,222,523 km (0.112 R)
• M19: 6,762,422 km (0.059 R)
• M20: 6,853,826 km (0.113 R)
• M21: 6,945,680 km (0.098 R)
• M22: 6,991,756 km (0.117 R)
• M23: 9,575,461 km (0.064 R)
• M24: 10,249,698 km (0.081 R)
• M25: 10,354,865 km (0.112 R)
• M26: 10,725,569 km (0.115 R)
• M27: 12,084,666 km (0.115 R)
• M28: 12,587,015 km (0.1 R)
• M29: 13,096,246 km (0.119 R)
• M30: 13,669,954 km (0.104 R)
• M31: 14,018,068 km (0.117 R)
• M32: 14,604,791 km (0.104 R)
• M33: 14,841,754 km (0.096 R)
• M34: 15,620,561 km (0.087 R)
• M35: 15,741,586 km (0.082 R)
• M36: 15,984,532 km (0.107 R)
• M37: 18,162,528 km (0.085 R)
• M38: 18,226,107 km (0.067 R)
• M39: 18,673,405 km (0.116 R)
• M40: 19,059,517 km (0.118 R)
• M41: 19,774,295 km (0.06 R)
• M42: 20,763,137 km (0.119 R)
• M43: 20,829,708 km (0.071 R)
• M44: 21,700,518 km (0.098 R)
• M45: 23,339,362 km (0.091 R)
• M46: 23,477,740 km (0.079 R)
• M47: 24,453,866 km (0.094 R)
• M48: 24,664,650 km (0.079 R)
• M49: 25,372,098 km (0.082 R)
• M50: 25,585,574 km (0.086 R)
• M51: 26,589,825 km (0.113 R)
• M52: 26,734,187 km (0.03 R)
• M53: 27,169,367 km (0.1 R)
• M54: 27,242,071 km (0.078 R)
• M55: 27,314,926 km (0.103 R)
• M56: 27,973,156 km (0.074 R)
• M57: 28,562,572 km (0.059 R)
• M58: 29,529,124 km (0.069 R)
• M59: 29,978,815 km (0.053 R)
• M60: 30,054,063 km (0.108 R)
• M61: 30,129,310 km (0.074 R)
• M62: 31,036,921 km (0.046 R)
• M63: 31,494,241 km (0.057 R)
• M64: 31,800,319 km (0.119 R)
• M65: 31,953,656 km (0.029 R)
• M66: 33,111,993 km (0.091 R)
• M67: 35,072,922 km (0.12 R)
• M68: 36,748,867 km (0.054 R)
• M69: 36,829,350 km (0.112 R)
• M70: 36,990,467 km (0.07 R)
• M71: 38,450,842 km (0.074 R)
• M72: 38,614,352 km (0.096 R)
• M73: 38,859,842 km (0.065 R)
• M74: 39,188,060 km (0.084 R)
• M75: 40,344,152 km (0.046 R)
• M76: 40,593,382 km (0.083 R)
• M77: 41,763,088 km (0.095 R)
• M78: 42,774,370 km (0.1 R)
• M79: 44,477,841 km (0.102 R)
• M80: 47,161,626 km (0.077 R)
• M81: 47,249,141 km (0.119 R)
• M82: 48,214,496 km (0.114 R)
• M83: 49,009,310 km (0.038 R)
• M84: 49,452,718 km (0.074 R)
• M85: 49,630,440 km (0.104 R)
• M86: 49,986,483 km (0.072 R)
• M87: 50,611,802 km (0.084 R)
• M88: 51,870,070 km (0.053 R)
• M89: 52,774,987 km (0.119 R)
• M90: 55,521,155 km (0.092 R)
• M91: 56,818,618 km (0.098 R)
• M92: 63,839,994 km (0.093 R)
• M93: 64,324,092 km (0.044 R)
• M94: 64,615,210 km (0.112 R)

Kuiper Belt

Range: 30 - 50 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 447 - 19,622 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit