🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.95 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 196.7

Radius: 10.3

Gravity: 1.85 G

Time & Orbit

Eccentricity (e): 0.093

Orbit Range: 0.86 AU - 1.04 AU

Year: 628 Days

Day: 14.4 Hours

Environment

Temp: -174 °C

Axial Tilt: 11.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (45)

Outer Limit: 60,176,514 km

• M1: 133,740 km (0.1 R)
• M2: 199,713 km (0.111 R)
• M3: 268,379 km (0.048 R)
• M4: 425,157 km (0.066 R)
• M5: 490,681 km (0.091 R)
• M6: 696,976 km (0.066 R)
• M7: 762,351 km (0.079 R)
• M8: 864,975 km (0.047 R)
• M9: 944,112 km (0.101 R)
• M10: 1,030,131 km (0.115 R)
• M11: 1,105,977 km (0.11 R)
• M12: 1,184,067 km (0.113 R)
• M13: 1,272,928 km (0.027 R)
• M14: 1,341,295 km (0.046 R)
• M15: 1,462,618 km (0.075 R)
• M16: 1,548,936 km (0.07 R)
• M17: 1,622,239 km (0.084 R)
• M18: 1,782,608 km (0.083 R)
• M19: 1,911,562 km (0.111 R)
• M20: 1,985,313 km (0.108 R)
• M21: 2,092,276 km (0.074 R)
• M22: 2,173,657 km (0.112 R)
• M23: 2,340,010 km (0.078 R)
• M24: 2,487,513 km (0.117 R)
• M25: 2,574,131 km (0.103 R)
• M26: 2,643,993 km (0.105 R)
• M27: 2,900,254 km (0.075 R)
• M28: 2,979,242 km (0.092 R)
• M29: 3,052,844 km (0.09 R)
• M30: 3,127,194 km (0.082 R)
• M31: 3,214,559 km (0.109 R)
• M32: 3,404,698 km (0.085 R)
• M33: 3,494,606 km (0.09 R)
• M34: 3,670,533 km (0.048 R)
• M35: 3,756,253 km (0.089 R)
• M36: 3,882,813 km (0.115 R)
• M37: 4,017,451 km (0.086 R)
• M38: 4,105,863 km (0.101 R)
• M39: 4,195,023 km (0.101 R)
• M40: 4,263,988 km (0.095 R)
• M41: 4,466,095 km (0.116 R)
• M42: 4,614,496 km (0.093 R)
• M43: 4,678,673 km (0.072 R)
• M44: 4,764,543 km (0.084 R)
• M45: 4,959,917 km (0.035 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 164.4

Radius: 13.1

Gravity: 0.96 G

Time & Orbit

Eccentricity (e): 0.162

Orbit Range: 0.83 AU - 1.15 AU

Year: 668 Days

Day: 12.7 Hours

Environment

Temp: -170 °C

Axial Tilt: 33.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (34)

Outer Limit: 60,176,514 km

• M1: 179,517 km (0.06 R)
• M2: 290,968 km (0.077 R)
• M3: 375,042 km (0.104 R)
• M4: 512,971 km (0.102 R)
• M5: 603,029 km (0.089 R)
• M6: 720,463 km (0.1 R)
• M7: 850,464 km (0.095 R)
• M8: 953,836 km (0.075 R)
• M9: 1,098,796 km (0.106 R)
• M10: 1,187,059 km (0.062 R)
• M11: 1,273,676 km (0.06 R)
• M12: 1,384,977 km (0.091 R)
• M13: 1,676,095 km (0.094 R)
• M14: 1,915,302 km (0.092 R)
• M15: 1,997,580 km (0.09 R)
• M16: 2,123,392 km (0.077 R)
• M17: 2,246,511 km (0.12 R)
• M18: 2,361,103 km (0.113 R)
• M19: 2,455,350 km (0.091 R)
• M20: 2,579,217 km (0.051 R)
• M21: 2,751,703 km (0.115 R)
• M22: 2,839,368 km (0.115 R)
• M23: 2,987,619 km (0.11 R)
• M24: 3,089,944 km (0.066 R)
• M25: 3,175,215 km (0.08 R)
• M26: 3,261,234 km (0.056 R)
• M27: 3,348,000 km (0.115 R)
• M28: 3,651,684 km (0.076 R)
• M29: 3,846,012 km (0.095 R)
• M30: 3,944,597 km (0.075 R)
• M31: 4,070,558 km (0.061 R)
• M32: 4,374,391 km (0.092 R)
• M33: 4,484,346 km (0.032 R)
• M34: 4,657,879 km (0.095 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 50.6

Radius: 12.4

Gravity: 0.33 G

Time & Orbit

Eccentricity (e): 0.238

Orbit Range: 1.58 AU - 2.58 AU

Year: 2035 Days

Day: 14.2 Hours

Environment

Temp: -208 °C

Axial Tilt: 38.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (30)

Outer Limit: 60,176,514 km

• M1: 156,629 km (0.033 R)
• M2: 359,783 km (0.08 R)
• M3: 577,448 km (0.108 R)
• M4: 731,085 km (0.058 R)
• M5: 904,618 km (0.117 R)
• M6: 1,071,719 km (0.109 R)
• M7: 1,862,344 km (0.066 R)
• M8: 2,039,169 km (0.083 R)
• M9: 2,126,235 km (0.109 R)
• M10: 2,283,611 km (0.064 R)
• M11: 2,437,847 km (0.109 R)
• M12: 2,624,695 km (0.098 R)
• M13: 2,876,318 km (0.074 R)
• M14: 2,959,495 km (0.119 R)
• M15: 3,105,053 km (0.059 R)
• M16: 3,292,350 km (0.066 R)
• M17: 3,843,468 km (0.109 R)
• M18: 3,985,886 km (0.037 R)
• M19: 4,198,464 km (0.086 R)
• M20: 4,284,633 km (0.071 R)
• M21: 4,903,968 km (0.115 R)
• M22: 5,224,257 km (0.055 R)
• M23: 5,345,132 km (0.06 R)
• M24: 5,438,631 km (0.118 R)
• M25: 5,608,275 km (0.095 R)
• M26: 5,799,012 km (0.049 R)
• M27: 6,098,956 km (0.07 R)
• M28: 6,275,331 km (0.115 R)
• M29: 6,364,193 km (0.112 R)
• M30: 6,533,238 km (0.093 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 370.3

Radius: 10.1

Gravity: 3.63 G

Time & Orbit

Eccentricity (e): 0.155

Orbit Range: 2.61 AU - 3.57 AU

Year: 3684 Days

Day: 12.2 Hours

Environment

Temp: -220 °C

Axial Tilt: 36.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 60,176,514 km

• M1: 142,567 km (0.046 R)
• M2: 219,011 km (0.115 R)
• M3: 368,908 km (0.11 R)
• M4: 593,904 km (0.085 R)
• M5: 718,668 km (0.094 R)
• M6: 823,536 km (0.092 R)
• M7: 944,262 km (0.103 R)
• M8: 1,283,999 km (0.112 R)
• M9: 1,437,935 km (0.049 R)
• M10: 1,560,455 km (0.107 R)
• M11: 1,648,419 km (0.072 R)
• M12: 1,764,058 km (0.1 R)
• M13: 1,855,911 km (0.053 R)
• M14: 1,922,632 km (0.112 R)
• M15: 2,268,053 km (0.083 R)
• M16: 2,633,222 km (0.03 R)
• M17: 2,815,133 km (0.096 R)
• M18: 3,080,071 km (0.093 R)
• M19: 3,304,467 km (0.094 R)
• M20: 3,667,841 km (0.061 R)
• M21: 3,769,268 km (0.04 R)
• M22: 3,888,647 km (0.098 R)
• M23: 4,219,258 km (0.059 R)
• M24: 4,290,018 km (0.096 R)
• M25: 4,468,788 km (0.095 R)
• M26: 4,833,657 km (0.118 R)
• M27: 4,944,958 km (0.096 R)
• M28: 5,132,553 km (0.119 R)
• M29: 5,246,248 km (0.047 R)
• M30: 5,866,480 km (0.06 R)
• M31: 6,025,204 km (0.069 R)
• M32: 6,387,530 km (0.117 R)
• M33: 6,694,954 km (0.113 R)
• M34: 6,861,007 km (0.093 R)
• M35: 7,028,258 km (0.041 R)
• M36: 7,473,910 km (0.092 R)
• M37: 7,841,472 km (0.116 R)
• M38: 8,082,474 km (0.102 R)
• M39: 8,215,017 km (0.071 R)
• M40: 8,661,866 km (0.062 R)
• M41: 8,933,835 km (0.103 R)
• M42: 9,300,799 km (0.091 R)
• M43: 9,813,471 km (0.077 R)
• M44: 10,383,289 km (0.107 R)
• M45: 10,696,397 km (0.096 R)
• M46: 11,012,647 km (0.097 R)
• M47: 11,332,039 km (0.041 R)
• M48: 11,604,606 km (0.09 R)
• M49: 11,879,417 km (0.111 R)
• M50: 11,954,815 km (0.105 R)
• M51: 12,639,823 km (0.115 R)
• M52: 12,716,717 km (0.067 R)
• M53: 13,181,368 km (0.083 R)
• M54: 13,259,458 km (0.092 R)
• M55: 13,441,967 km (0.12 R)
• M56: 13,915,444 km (0.069 R)
• M57: 13,994,731 km (0.062 R)
• M58: 14,127,574 km (0.026 R)
• M59: 14,474,492 km (0.039 R)
• M60: 14,824,401 km (0.088 R)
• M61: 15,258,833 km (0.077 R)
• M62: 15,450,169 km (0.079 R)
• M63: 16,084,613 km (0.087 R)
• M64: 16,195,914 km (0.086 R)
• M65: 16,531,014 km (0.111 R)
• M66: 17,436,081 km (0.042 R)
• M67: 17,550,373 km (0.058 R)
• M68: 17,722,261 km (0.114 R)
• M69: 17,808,280 km (0.105 R)
• M70: 18,038,661 km (0.1 R)
• M71: 18,241,067 km (0.089 R)
• M72: 18,357,155 km (0.088 R)
• M73: 19,441,739 km (0.05 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.44 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 127.5

Radius: 14.3

Gravity: 0.62 G

Time & Orbit

Eccentricity (e): 0.127

Orbit Range: 3 AU - 3.88 AU

Year: 4327 Days

Day: 14.2 Hours

Environment

Temp: -206 °C

Axial Tilt: 24.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (59)

Outer Limit: 60,176,514 km

• M1: 203,453 km (0.079 R)
• M2: 297,101 km (0.119 R)
• M3: 416,780 km (0.101 R)
• M4: 561,441 km (0.093 R)
• M5: 773,720 km (0.12 R)
• M6: 1,159,234 km (0.097 R)
• M7: 1,614,610 km (0.028 R)
• M8: 1,796,970 km (0.076 R)
• M9: 1,963,921 km (0.104 R)
• M10: 2,055,026 km (0.12 R)
• M11: 2,277,628 km (0.08 R)
• M12: 2,471,357 km (0.116 R)
• M13: 2,582,807 km (0.076 R)
• M14: 2,927,630 km (0.077 R)
• M15: 3,032,648 km (0.117 R)
• M16: 3,273,800 km (0.106 R)
• M17: 3,410,682 km (0.056 R)
• M18: 3,535,446 km (0.103 R)
• M19: 3,661,707 km (0.071 R)
• M20: 4,006,231 km (0.109 R)
• M21: 4,108,706 km (0.106 R)
• M22: 4,436,474 km (0.111 R)
• M23: 4,603,725 km (0.06 R)
• M24: 4,773,070 km (0.109 R)
• M25: 5,070,470 km (0.051 R)
• M26: 5,601,543 km (0.116 R)
• M27: 5,766,100 km (0.072 R)
• M28: 5,865,583 km (0.078 R)
• M29: 6,015,929 km (0.069 R)
• M30: 6,371,673 km (0.099 R)
• M31: 6,664,884 km (0.098 R)
• M32: 6,892,124 km (0.12 R)
• M33: 7,193,114 km (0.119 R)
• M34: 7,282,424 km (0.073 R)
• M35: 7,462,241 km (0.099 R)
• M36: 7,955,316 km (0.096 R)
• M37: 8,140,667 km (0.041 R)
• M38: 8,252,567 km (0.055 R)
• M39: 8,496,710 km (0.069 R)
• M40: 8,819,692 km (0.094 R)
• M41: 9,108,117 km (0.036 R)
• M42: 9,302,145 km (0.11 R)
• M43: 9,912,205 km (0.049 R)
• M44: 10,172,057 km (0.113 R)
• M45: 10,292,633 km (0.063 R)
• M46: 10,393,611 km (0.116 R)
• M47: 12,351,548 km (0.108 R)
• M48: 13,372,703 km (0.051 R)
• M49: 13,571,369 km (0.082 R)
• M50: 13,815,513 km (0.102 R)
• M51: 13,993,983 km (0.033 R)
• M52: 14,173,201 km (0.118 R)
• M53: 14,330,578 km (0.045 R)
• M54: 14,692,755 km (0.078 R)
• M55: 14,897,704 km (0.11 R)
• M56: 15,080,812 km (0.093 R)
• M57: 15,241,629 km (0.103 R)
• M58: 15,333,632 km (0.069 R)
• M59: 15,657,661 km (0.075 R)

Planet 6 - Ice Giant

Semi-Major Axis: 6.21 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 962.3

Radius: 3.3

Gravity: 88.37 G

Time & Orbit

Eccentricity (e): 0.083

Orbit Range: 5.69 AU - 6.73 AU

Year: 10496 Days

Day: 19 Hours

Environment

Temp: -223 °C

Axial Tilt: 37.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 60,176,514 km

• M1: 45,927 km (0.051 R)
• M2: 234,270 km (0.105 R)
• M3: 286,779 km (0.092 R)
• M4: 358,137 km (0.087 R)
• M5: 388,356 km (0.106 R)
• M6: 535,112 km (0.059 R)
• M7: 698,024 km (0.079 R)
• M8: 896,390 km (0.061 R)
• M9: 959,222 km (0.107 R)
• M10: 1,462,768 km (0.047 R)
• M11: 1,663,379 km (0.11 R)
• M12: 1,766,900 km (0.068 R)
• M13: 1,926,073 km (0.098 R)
• M14: 2,286,753 km (0.114 R)
• M15: 2,372,921 km (0.108 R)
• M16: 2,548,549 km (0.084 R)
• M17: 2,943,189 km (0.045 R)
• M18: 3,131,831 km (0.086 R)
• M19: 3,195,560 km (0.072 R)
• M20: 3,227,574 km (0.117 R)
• M21: 3,291,901 km (0.114 R)
• M22: 3,586,908 km (0.11 R)
• M23: 5,602,889 km (0.087 R)
• M24: 5,680,231 km (0.105 R)
• M25: 6,033,133 km (0.114 R)
• M26: 7,343,759 km (0.067 R)
• M27: 8,559,541 km (0.119 R)
• M28: 8,604,122 km (0.117 R)
• M29: 9,603,735 km (0.092 R)
• M30: 9,650,110 km (0.097 R)
• M31: 10,258,824 km (0.075 R)
• M32: 10,735,442 km (0.09 R)
• M33: 11,122,003 km (0.053 R)
• M34: 11,513,052 km (0.072 R)
• M35: 11,759,739 km (0.068 R)
• M36: 11,858,922 km (0.111 R)
• M37: 12,008,221 km (0.109 R)
• M38: 12,409,293 km (0.077 R)
• M39: 13,276,213 km (0.098 R)
• M40: 13,742,958 km (0.099 R)
• M41: 14,692,605 km (0.119 R)
• M42: 15,663,196 km (0.043 R)
• M43: 15,717,650 km (0.111 R)
• M44: 15,881,609 km (0.089 R)
• M45: 15,936,512 km (0.049 R)
• M46: 16,211,323 km (0.063 R)
• M47: 17,045,181 km (0.107 R)
• M48: 17,157,380 km (0.101 R)
• M49: 17,326,276 km (0.118 R)
• M50: 19,102,601 km (0.076 R)
• M51: 22,762,962 km (0.054 R)
• M52: 25,405,010 km (0.041 R)
• M53: 25,469,037 km (0.048 R)
• M54: 25,725,897 km (0.084 R)
• M55: 26,827,087 km (0.104 R)
• M56: 27,679,496 km (0.092 R)
• M57: 28,208,474 km (0.117 R)
• M58: 28,274,746 km (0.059 R)
• M59: 28,607,302 km (0.077 R)
• M60: 29,008,074 km (0.085 R)
• M61: 29,477,961 km (0.07 R)
• M62: 29,545,430 km (0.074 R)
• M63: 30,902,731 km (0.11 R)
• M64: 31,795,980 km (0.081 R)
• M65: 32,003,323 km (0.062 R)
• M66: 33,116,630 km (0.072 R)
• M67: 34,596,901 km (0.1 R)
• M68: 34,739,019 km (0.073 R)
• M69: 35,237,928 km (0.068 R)
• M70: 36,098,714 km (0.084 R)
• M71: 36,170,671 km (0.076 R)
• M72: 36,315,033 km (0.091 R)
• M73: 37,111,641 km (0.119 R)
• M74: 37,257,051 km (0.118 R)
• M75: 38,060,541 km (0.106 R)
• M76: 38,354,201 km (0.118 R)
• M77: 38,574,858 km (0.114 R)
• M78: 40,505,119 km (0.082 R)
• M79: 41,481,844 km (0.077 R)
• M80: 41,632,788 km (0.103 R)
• M81: 42,162,664 km (0.03 R)
• M82: 44,073,029 km (0.092 R)
• M83: 45,232,711 km (0.104 R)
• M84: 45,310,502 km (0.044 R)
• M85: 45,777,397 km (0.031 R)
• M86: 46,951,741 km (0.086 R)
• M87: 47,740,121 km (0.079 R)
• M88: 49,330,047 km (0.034 R)
• M89: 49,410,082 km (0.05 R)
• M90: 51,098,893 km (0.106 R)
• M91: 52,643,192 km (0.093 R)
• M92: 52,970,212 km (0.085 R)
• M93: 54,615,639 km (0.07 R)

Planet 7 - Ice Giant

Semi-Major Axis: 9.23 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 374.7

Radius: 6.2

Gravity: 9.75 G

Time & Orbit

Eccentricity (e): 0.177

Orbit Range: 7.6 AU - 10.86 AU

Year: 19019 Days

Day: 17.8 Hours

Environment

Temp: -225 °C

Axial Tilt: 41.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 60,176,514 km

• M1: 329,115 km (0.106 R)
• M2: 522,246 km (0.083 R)
• M3: 613,052 km (0.105 R)
• M4: 749,037 km (0.112 R)
• M5: 873,502 km (0.101 R)
• M6: 916,586 km (0.088 R)
• M7: 1,540,260 km (0.116 R)
• M8: 1,892,712 km (0.045 R)
• M9: 2,180,688 km (0.116 R)
• M10: 2,638,158 km (0.071 R)
• M11: 2,992,107 km (0.049 R)
• M12: 3,498,945 km (0.106 R)
• M13: 3,815,793 km (0.068 R)
• M14: 5,492,935 km (0.114 R)
• M15: 5,737,228 km (0.116 R)
• M16: 5,778,218 km (0.087 R)
• M17: 5,902,085 km (0.119 R)
• M18: 5,985,112 km (0.062 R)
• M19: 6,321,108 km (0.111 R)
• M20: 6,706,323 km (0.068 R)
• M21: 9,173,042 km (0.119 R)
• M22: 9,317,554 km (0.118 R)
• M23: 10,400,194 km (0.099 R)
• M24: 10,702,232 km (0.061 R)
• M25: 11,058,424 km (0.118 R)
• M26: 11,160,899 km (0.109 R)
• M27: 11,418,506 km (0.07 R)
• M28: 11,991,915 km (0.064 R)
• M29: 12,361,870 km (0.076 R)
• M30: 12,842,828 km (0.083 R)
• M31: 12,896,683 km (0.113 R)
• M32: 13,221,161 km (0.103 R)
• M33: 13,275,465 km (0.05 R)
• M34: 14,266,551 km (0.039 R)
• M35: 15,053,735 km (0.104 R)
• M36: 15,167,279 km (0.119 R)
• M37: 15,395,416 km (0.111 R)
• M38: 15,567,154 km (0.104 R)
• M39: 16,260,690 km (0.11 R)
• M40: 17,141,672 km (0.059 R)
• M41: 18,219,225 km (0.108 R)
• M42: 18,461,724 km (0.082 R)
• M43: 19,195,352 km (0.078 R)
• M44: 20,188,382 km (0.092 R)
• M45: 21,709,045 km (0.073 R)
• M46: 21,901,727 km (0.099 R)
• M47: 22,159,484 km (0.077 R)
• M48: 22,483,064 km (0.106 R)
• M49: 22,743,215 km (0.117 R)
• M50: 23,727,120 km (0.072 R)
• M51: 24,858,977 km (0.105 R)
• M52: 25,465,298 km (0.086 R)
• M53: 25,736,369 km (0.1 R)
• M54: 26,281,354 km (0.111 R)
• M55: 26,899,044 km (0.118 R)
• M56: 28,078,623 km (0.119 R)
• M57: 28,709,926 km (0.103 R)
• M58: 28,921,457 km (0.074 R)
• M59: 30,920,085 km (0.111 R)
• M60: 31,499,328 km (0.118 R)
• M61: 32,082,161 km (0.087 R)
• M62: 32,668,435 km (0.073 R)
• M63: 34,299,052 km (0.048 R)
• M64: 36,183,985 km (0.084 R)
• M65: 36,412,421 km (0.069 R)
• M66: 37,177,315 km (0.091 R)
• M67: 37,638,824 km (0.113 R)
• M68: 38,956,782 km (0.097 R)
• M69: 39,739,029 km (0.111 R)
• M70: 39,896,107 km (0.088 R)
• M71: 41,876,932 km (0.099 R)
• M72: 42,517,510 km (0.084 R)
• M73: 43,565,443 km (0.066 R)
• M74: 43,889,622 km (0.118 R)
• M75: 44,948,475 km (0.108 R)
• M76: 45,030,305 km (0.102 R)
• M77: 45,276,095 km (0.104 R)
• M78: 45,686,591 km (0.099 R)
• M79: 45,768,870 km (0.111 R)
• M80: 47,008,588 km (0.102 R)
• M81: 47,340,994 km (0.117 R)
• M82: 47,424,171 km (0.106 R)
• M83: 51,305,338 km (0.101 R)
• M84: 51,904,926 km (0.097 R)
• M85: 52,679,095 km (0.111 R)
• M86: 53,804,071 km (0.044 R)
• M87: 54,151,736 km (0.094 R)
• M88: 56,430,262 km (0.069 R)
• M89: 57,936,862 km (0.084 R)
• M90: 58,204,193 km (0.068 R)
• M91: 59,906,318 km (0.101 R)
• M92: 59,996,376 km (0.108 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 175 - 16,022 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit