🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.02 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.16

Radius: 1.58

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.249

Orbit Range: 0.77 AU - 1.27 AU

Year: 394 Days

Day: 39 Hours

Environment

Temp: 9 °C

Axial Tilt: 31.6 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (2)

Outer Limit: 90,968,608 km

• M1: 571,314 km (0.115 R)
• M2: 845,826 km (0.116 R)

Planet 2 - Gas Giant

Semi-Major Axis: 4.85 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 799.7

Radius: 11.5

Gravity: 6.05 G

Time & Orbit

Eccentricity (e): 0.048

Orbit Range: 4.62 AU - 5.08 AU

Year: 4090 Days

Day: 10.2 Hours

Environment

Temp: -147 °C

Axial Tilt: 21.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 90,968,608 km

• M1: 188,793 km (0.099 R)
• M2: 519,553 km (0.083 R)
• M3: 902,524 km (0.058 R)
• M4: 1,138,589 km (0.112 R)
• M5: 1,235,978 km (0.117 R)
• M6: 1,530,536 km (0.104 R)
• M7: 1,623,286 km (0.105 R)
• M8: 1,963,622 km (0.064 R)
• M9: 2,099,307 km (0.102 R)
• M10: 2,416,155 km (0.087 R)
• M11: 2,506,961 km (0.107 R)
• M12: 2,786,260 km (0.113 R)
• M13: 2,997,792 km (0.061 R)
• M14: 3,075,882 km (0.112 R)
• M15: 3,154,869 km (0.057 R)
• M16: 3,456,908 km (0.081 R)
• M17: 4,263,839 km (0.103 R)
• M18: 4,598,190 km (0.081 R)
• M19: 4,757,212 km (0.091 R)
• M20: 5,127,467 km (0.086 R)
• M21: 5,579,253 km (0.066 R)
• M22: 5,797,815 km (0.104 R)
• M23: 6,068,886 km (0.113 R)
• M24: 6,218,484 km (0.093 R)
• M25: 6,445,125 km (0.029 R)
• M26: 7,089,293 km (0.06 R)
• M27: 7,194,311 km (0.108 R)
• M28: 7,326,257 km (0.12 R)
• M29: 7,458,950 km (0.112 R)
• M30: 7,673,174 km (0.106 R)
• M31: 7,781,034 km (0.037 R)
• M32: 8,383,016 km (0.044 R)
• M33: 8,466,342 km (0.072 R)
• M34: 8,717,816 km (0.111 R)
• M35: 8,858,588 km (0.105 R)
• M36: 9,113,951 km (0.12 R)
• M37: 9,573,965 km (0.098 R)
• M38: 9,777,717 km (0.101 R)
• M39: 10,337,662 km (0.115 R)
• M40: 10,908,078 km (0.104 R)
• M41: 10,999,183 km (0.091 R)
• M42: 11,090,438 km (0.063 R)
• M43: 11,488,817 km (0.095 R)
• M44: 11,829,601 km (0.065 R)
• M45: 12,205,241 km (0.072 R)
• M46: 12,299,787 km (0.114 R)
• M47: 12,584,921 km (0.062 R)
• M48: 13,161,471 km (0.109 R)
• M49: 14,674,205 km (0.082 R)
• M50: 14,841,904 km (0.071 R)
• M51: 14,942,883 km (0.059 R)
• M52: 15,792,898 km (0.067 R)
• M53: 16,275,800 km (0.09 R)
• M54: 16,484,339 km (0.113 R)
• M55: 17,150,349 km (0.116 R)
• M56: 17,968,350 km (0.108 R)
• M57: 18,219,824 km (0.097 R)
• M58: 18,291,780 km (0.114 R)
• M59: 18,508,548 km (0.096 R)
• M60: 18,581,103 km (0.05 R)
• M61: 18,798,917 km (0.101 R)
• M62: 18,871,771 km (0.095 R)
• M63: 19,090,783 km (0.057 R)
• M64: 19,164,086 km (0.111 R)
• M65: 19,274,040 km (0.117 R)
• M66: 19,716,102 km (0.086 R)
• M67: 20,198,705 km (0.074 R)
• M68: 20,348,003 km (0.065 R)
• M69: 21,289,423 km (0.119 R)
• M70: 22,129,714 km (0.107 R)
• M71: 22,553,824 km (0.07 R)
• M72: 22,669,912 km (0.107 R)
• M73: 23,253,792 km (0.037 R)
• M74: 24,079,273 km (0.098 R)
• M75: 24,436,064 km (0.098 R)
• M76: 24,555,294 km (0.097 R)
• M77: 24,834,443 km (0.077 R)
• M78: 25,194,974 km (0.061 R)
• M79: 25,476,517 km (0.09 R)
• M80: 25,880,581 km (0.058 R)
• M81: 26,449,801 km (0.069 R)
• M82: 26,858,951 km (0.111 R)

Planet 3 - Gas Giant

Semi-Major Axis: 8.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 478.6

Radius: 14.7

Gravity: 2.21 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 6.78 AU - 10.3 AU

Year: 9556 Days

Day: 11.8 Hours

Environment

Temp: -180 °C

Axial Tilt: 12.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 90,968,608 km

• M1: 189,541 km (0.107 R)
• M2: 345,272 km (0.08 R)
• M3: 451,786 km (0.109 R)
• M4: 562,039 km (0.066 R)
• M5: 712,684 km (0.113 R)
• M6: 816,954 km (0.086 R)
• M7: 993,031 km (0.097 R)
• M8: 1,129,913 km (0.101 R)
• M9: 1,404,724 km (0.106 R)
• M10: 1,580,502 km (0.117 R)
• M11: 1,805,796 km (0.08 R)
• M12: 2,108,283 km (0.111 R)
• M13: 2,569,343 km (0.079 R)
• M14: 3,190,175 km (0.102 R)
• M15: 3,451,672 km (0.099 R)
• M16: 3,884,758 km (0.044 R)
• M17: 4,136,232 km (0.074 R)
• M18: 4,392,941 km (0.109 R)
• M19: 4,538,051 km (0.044 R)
• M20: 4,922,668 km (0.037 R)
• M21: 5,256,420 km (0.096 R)
• M22: 5,503,855 km (0.093 R)
• M23: 6,269,348 km (0.118 R)
• M24: 8,112,543 km (0.077 R)
• M25: 8,982,305 km (0.083 R)
• M26: 9,278,958 km (0.079 R)
• M27: 9,654,299 km (0.114 R)
• M28: 9,881,987 km (0.064 R)
• M29: 10,614,418 km (0.081 R)
• M30: 10,849,436 km (0.076 R)
• M31: 11,244,973 km (0.119 R)
• M32: 12,009,567 km (0.107 R)
• M33: 12,172,779 km (0.102 R)
• M34: 12,418,867 km (0.084 R)
• M35: 12,749,479 km (0.043 R)
• M36: 12,999,457 km (0.067 R)
• M37: 13,208,894 km (0.047 R)
• M38: 13,546,536 km (0.082 R)
• M39: 14,144,179 km (0.071 R)
• M40: 14,619,901 km (0.062 R)
• M41: 15,454,058 km (0.111 R)
• M42: 15,587,051 km (0.062 R)
• M43: 15,899,262 km (0.101 R)
• M44: 16,123,359 km (0.078 R)
• M45: 16,393,832 km (0.098 R)
• M46: 16,665,801 km (0.094 R)
• M47: 17,260,154 km (0.035 R)
• M48: 17,861,387 km (0.028 R)
• M49: 18,094,610 km (0.066 R)
• M50: 18,705,419 km (0.069 R)
• M51: 19,227,665 km (0.089 R)
• M52: 19,370,830 km (0.092 R)
• M53: 19,995,700 km (0.07 R)
• M54: 20,529,765 km (0.119 R)
• M55: 20,773,908 km (0.118 R)
• M56: 21,019,249 km (0.108 R)
• M57: 21,413,589 km (0.051 R)
• M58: 21,760,656 km (0.111 R)
• M59: 22,863,641 km (0.089 R)
• M60: 23,626,141 km (0.055 R)
• M61: 24,242,185 km (0.118 R)
• M62: 24,345,408 km (0.1 R)
• M63: 24,915,525 km (0.118 R)
• M64: 25,647,508 km (0.118 R)
• M65: 26,121,883 km (0.119 R)
• M66: 26,599,100 km (0.076 R)
• M67: 26,812,127 km (0.107 R)
• M68: 28,373,480 km (0.102 R)
• M69: 29,467,489 km (0.066 R)
• M70: 30,075,156 km (0.03 R)
• M71: 30,352,660 km (0.036 R)
• M72: 30,742,662 km (0.092 R)
• M73: 31,979,238 km (0.116 R)
• M74: 32,262,576 km (0.071 R)
• M75: 32,717,503 km (0.101 R)
• M76: 33,864,470 km (0.105 R)
• M77: 34,500,859 km (0.109 R)
• M78: 34,675,141 km (0.112 R)
• M79: 34,791,378 km (0.107 R)
• M80: 36,611,087 km (0.046 R)
• M81: 37,026,371 km (0.073 R)
• M82: 37,622,219 km (0.111 R)
• M83: 38,823,340 km (0.101 R)
• M84: 39,489,350 km (0.119 R)
• M85: 40,220,285 km (0.082 R)
• M86: 41,017,193 km (0.119 R)

Planet 4 - Gas Giant

Semi-Major Axis: 8.89 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 928.6

Radius: 14.8

Gravity: 4.24 G

Time & Orbit

Eccentricity (e): 0.25

Orbit Range: 6.67 AU - 11.11 AU

Year: 10149 Days

Day: 11.6 Hours

Environment

Temp: -169 °C

Axial Tilt: 4.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 90,968,608 km

• M1: 188,793 km (0.111 R)
• M2: 292,165 km (0.062 R)
• M3: 407,953 km (0.09 R)
• M4: 518,805 km (0.111 R)
• M5: 728,093 km (0.082 R)
• M6: 1,215,483 km (0.076 R)
• M7: 1,324,839 km (0.109 R)
• M8: 1,948,961 km (0.12 R)
• M9: 2,403,439 km (0.097 R)
• M10: 2,773,694 km (0.055 R)
• M11: 3,348,000 km (0.115 R)
• M12: 3,762,536 km (0.1 R)
• M13: 4,261,445 km (0.088 R)
• M14: 5,139,734 km (0.097 R)
• M15: 5,693,396 km (0.11 R)
• M16: 6,579,614 km (0.071 R)
• M17: 6,698,394 km (0.043 R)
• M18: 6,817,923 km (0.102 R)
• M19: 6,938,200 km (0.059 R)
• M20: 8,522,142 km (0.071 R)
• M21: 10,582,703 km (0.11 R)
• M22: 11,909,187 km (0.12 R)
• M23: 12,297,843 km (0.111 R)
• M24: 12,839,088 km (0.032 R)
• M25: 13,287,732 km (0.088 R)
• M26: 13,539,355 km (0.12 R)
• M27: 13,691,048 km (0.089 R)
• M28: 13,945,065 km (0.105 R)
• M29: 14,768,451 km (0.117 R)
• M30: 15,081,410 km (0.048 R)
• M31: 15,343,805 km (0.086 R)
• M32: 15,766,868 km (0.065 R)
• M33: 16,033,152 km (0.086 R)
• M34: 16,301,082 km (0.051 R)
• M35: 16,462,498 km (0.047 R)
• M36: 17,004,491 km (0.103 R)
• M37: 18,217,580 km (0.108 R)
• M38: 19,173,959 km (0.083 R)
• M39: 19,401,348 km (0.116 R)
• M40: 20,146,644 km (0.118 R)
• M41: 20,377,923 km (0.071 R)
• M42: 20,609,949 km (0.073 R)
• M43: 21,606,271 km (0.08 R)
• M44: 22,080,496 km (0.104 R)
• M45: 22,318,955 km (0.05 R)
• M46: 22,738,278 km (0.074 R)
• M47: 22,979,131 km (0.101 R)
• M48: 24,011,954 km (0.106 R)
• M49: 25,059,887 km (0.112 R)
• M50: 26,122,780 km (0.108 R)
• M51: 26,564,692 km (0.083 R)
• M52: 27,584,202 km (0.101 R)
• M53: 30,254,673 km (0.062 R)
• M54: 30,453,339 km (0.114 R)
• M55: 31,185,322 km (0.099 R)
• M56: 33,006,676 km (0.09 R)
• M57: 34,516,118 km (0.095 R)
• M58: 34,654,496 km (0.099 R)
• M59: 36,751,709 km (0.083 R)
• M60: 36,893,079 km (0.106 R)
• M61: 38,889,911 km (0.086 R)
• M62: 39,033,824 km (0.101 R)
• M63: 39,178,037 km (0.09 R)
• M64: 39,683,977 km (0.095 R)
• M65: 39,974,047 km (0.112 R)
• M66: 40,337,719 km (0.087 R)
• M67: 40,556,432 km (0.049 R)
• M68: 40,921,750 km (0.114 R)
• M69: 41,950,534 km (0.106 R)
• M70: 43,211,195 km (0.074 R)
• M71: 44,108,633 km (0.097 R)
• M72: 45,466,383 km (0.061 R)
• M73: 46,837,747 km (0.116 R)
• M74: 47,990,847 km (0.039 R)
• M75: 48,222,574 km (0.117 R)
• M76: 48,609,734 km (0.058 R)
• M77: 48,842,508 km (0.041 R)
• M78: 49,777,195 km (0.092 R)
• M79: 51,111,459 km (0.096 R)
• M80: 52,139,795 km (0.111 R)
• M81: 52,935,506 km (0.107 R)

Planet 5 - Ice Giant

Semi-Major Axis: 11.77 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 815.5

Radius: 7.2

Gravity: 15.73 G

Time & Orbit

Eccentricity (e): 0.123

Orbit Range: 10.32 AU - 13.22 AU

Year: 15461 Days

Day: 15.8 Hours

Environment

Temp: -183 °C

Axial Tilt: 25.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 90,968,608 km

• M1: 91,703 km (0.069 R)
• M2: 147,504 km (0.103 R)
• M3: 253,419 km (0.034 R)
• M4: 326,123 km (0.08 R)
• M5: 514,766 km (0.084 R)
• M6: 652,696 km (0.098 R)
• M7: 1,319,004 km (0.104 R)
• M8: 1,427,463 km (0.11 R)
• M9: 1,482,814 km (0.095 R)
• M10: 1,741,020 km (0.087 R)
• M11: 1,890,618 km (0.06 R)
• M12: 1,982,471 km (0.069 R)
• M13: 2,075,820 km (0.104 R)
• M14: 3,087,550 km (0.109 R)
• M15: 3,567,161 km (0.076 R)
• M16: 3,681,155 km (0.114 R)
• M17: 3,912,882 km (0.119 R)
• M18: 4,636,188 km (0.037 R)
• M19: 4,802,540 km (0.082 R)
• M20: 4,886,315 km (0.09 R)
• M21: 5,930,957 km (0.11 R)
• M22: 7,572,195 km (0.047 R)
• M23: 8,065,420 km (0.09 R)
• M24: 8,670,992 km (0.085 R)
• M25: 8,722,154 km (0.083 R)
• M26: 9,031,074 km (0.098 R)
• M27: 9,712,642 km (0.101 R)
• M28: 10,194,197 km (0.105 R)
• M29: 10,356,361 km (0.11 R)
• M30: 10,519,573 km (0.101 R)
• M31: 11,069,345 km (0.096 R)
• M32: 11,684,940 km (0.084 R)
• M33: 12,600,180 km (0.113 R)
• M34: 12,658,074 km (0.097 R)
• M35: 12,890,849 km (0.082 R)
• M36: 13,183,761 km (0.046 R)
• M37: 13,538,159 km (0.073 R)
• M38: 14,316,815 km (0.099 R)
• M39: 14,559,314 km (0.065 R)
• M40: 14,620,200 km (0.038 R)
• M41: 15,356,969 km (0.095 R)
• M42: 15,605,152 km (0.043 R)
• M43: 16,484,489 km (0.075 R)
• M44: 16,547,918 km (0.106 R)
• M45: 18,159,686 km (0.105 R)
• M46: 19,484,823 km (0.042 R)
• M47: 20,226,829 km (0.041 R)
• M48: 22,789,889 km (0.086 R)
• M49: 23,002,169 km (0.097 R)
• M50: 23,215,046 km (0.096 R)
• M51: 25,379,877 km (0.097 R)
• M52: 26,115,749 km (0.109 R)
• M53: 27,382,843 km (0.063 R)
• M54: 27,533,189 km (0.081 R)
• M55: 27,986,022 km (0.1 R)
• M56: 28,593,539 km (0.094 R)
• M57: 28,975,462 km (0.112 R)
• M58: 31,066,840 km (0.086 R)
• M59: 33,527,426 km (0.099 R)
• M60: 34,172,492 km (0.088 R)
• M61: 35,803,109 km (0.089 R)
• M62: 36,545,114 km (0.038 R)
• M63: 36,710,719 km (0.071 R)
• M64: 37,458,858 km (0.069 R)
• M65: 38,296,157 km (0.109 R)
• M66: 39,478,579 km (0.078 R)
• M67: 40,587,249 km (0.103 R)
• M68: 40,672,968 km (0.098 R)
• M69: 40,844,557 km (0.102 R)
• M70: 41,016,445 km (0.073 R)
• M71: 41,274,651 km (0.087 R)
• M72: 41,965,793 km (0.073 R)
• M73: 43,272,082 km (0.108 R)
• M74: 45,389,789 km (0.104 R)
• M75: 47,812,377 km (0.075 R)
• M76: 47,902,884 km (0.096 R)
• M77: 48,720,137 km (0.083 R)
• M78: 48,902,497 km (0.096 R)
• M79: 49,908,842 km (0.092 R)
• M80: 50,460,708 km (0.075 R)
• M81: 51,014,519 km (0.114 R)
• M82: 52,128,276 km (0.104 R)
• M83: 53,343,908 km (0.105 R)
• M84: 55,612,560 km (0.082 R)
• M85: 63,100,531 km (0.067 R)
• M86: 63,498,163 km (0.034 R)
• M87: 65,699,495 km (0.106 R)
• M88: 65,800,175 km (0.091 R)
• M89: 66,102,362 km (0.117 R)
• M90: 66,708,383 km (0.094 R)
• M91: 67,214,623 km (0.115 R)
• M92: 67,519,054 km (0.075 R)

Planet 6 - Ice Giant

Semi-Major Axis: 16.69 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 687

Radius: 5.7

Gravity: 21.14 G

Time & Orbit

Eccentricity (e): 0.032

Orbit Range: 16.16 AU - 17.22 AU

Year: 26107 Days

Day: 23.4 Hours

Environment

Temp: -202 °C

Axial Tilt: 6.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 90,968,608 km

• M1: 73,752 km (0.113 R)
• M2: 408,851 km (0.106 R)
• M3: 474,225 km (0.05 R)
• M4: 744,249 km (0.116 R)
• M5: 1,087,128 km (0.054 R)
• M6: 1,440,328 km (0.099 R)
• M7: 1,863,690 km (0.114 R)
• M8: 2,127,731 km (0.109 R)
• M9: 2,363,347 km (0.101 R)
• M10: 4,934,785 km (0.105 R)
• M11: 4,986,247 km (0.069 R)
• M12: 5,404,522 km (0.036 R)
• M13: 5,457,480 km (0.059 R)
• M14: 7,186,831 km (0.099 R)
• M15: 8,507,781 km (0.043 R)
• M16: 8,818,346 km (0.111 R)
• M17: 9,069,521 km (0.06 R)
• M18: 10,228,306 km (0.041 R)
• M19: 10,959,241 km (0.035 R)
• M20: 11,569,750 km (0.109 R)
• M21: 11,844,561 km (0.06 R)
• M22: 11,913,675 km (0.067 R)
• M23: 11,982,789 km (0.12 R)
• M24: 12,191,179 km (0.081 R)
• M25: 12,823,529 km (0.076 R)
• M26: 14,487,207 km (0.04 R)
• M27: 14,561,109 km (0.103 R)
• M28: 16,757,056 km (0.102 R)
• M29: 18,650,965 km (0.086 R)
• M30: 18,892,416 km (0.105 R)
• M31: 19,134,914 km (0.086 R)
• M32: 21,028,225 km (0.066 R)
• M33: 21,531,771 km (0.113 R)
• M34: 21,785,040 km (0.105 R)
• M35: 22,039,357 km (0.117 R)
• M36: 24,459,850 km (0.03 R)
• M37: 24,547,814 km (0.05 R)
• M38: 24,989,427 km (0.119 R)
• M39: 25,344,572 km (0.033 R)
• M40: 26,329,674 km (0.098 R)
• M41: 27,327,342 km (0.081 R)
• M42: 30,204,857 km (0.111 R)
• M43: 33,665,056 km (0.072 R)
• M44: 34,549,479 km (0.111 R)
• M45: 34,747,097 km (0.055 R)
• M46: 35,242,715 km (0.098 R)
• M47: 35,342,048 km (0.12 R)
• M48: 35,441,531 km (0.095 R)
• M49: 35,640,945 km (0.118 R)
• M50: 36,441,742 km (0.098 R)
• M51: 37,552,506 km (0.109 R)
• M52: 38,060,989 km (0.09 R)
• M53: 38,469,541 km (0.083 R)
• M54: 39,084,987 km (0.096 R)
• M55: 39,807,096 km (0.035 R)
• M56: 41,369,346 km (0.114 R)
• M57: 41,579,232 km (0.096 R)
• M58: 42,845,429 km (0.075 R)
• M59: 44,553,537 km (0.034 R)
• M60: 46,283,636 km (0.108 R)
• M61: 47,266,494 km (0.092 R)
• M62: 48,145,980 km (0.062 R)
• M63: 50,480,006 km (0.118 R)
• M64: 51,153,496 km (0.103 R)
• M65: 51,266,143 km (0.078 R)
• M66: 53,763,231 km (0.093 R)
• M67: 55,372,754 km (0.074 R)
• M68: 55,951,399 km (0.091 R)
• M69: 57,231,508 km (0.111 R)
• M70: 57,348,344 km (0.103 R)
• M71: 57,816,585 km (0.111 R)
• M72: 58,286,023 km (0.117 R)
• M73: 58,403,607 km (0.096 R)
• M74: 61,248,809 km (0.08 R)
• M75: 62,688,240 km (0.108 R)
• M76: 62,808,666 km (0.116 R)
• M77: 63,291,269 km (0.107 R)
• M78: 63,775,218 km (0.063 R)
• M79: 66,580,926 km (0.051 R)
• M80: 69,675,956 km (0.111 R)
• M81: 71,933,388 km (0.104 R)
• M82: 76,005,293 km (0.04 R)
• M83: 77,551,387 km (0.111 R)
• M84: 80,020,649 km (0.037 R)
• M85: 82,383,547 km (0.094 R)
• M86: 82,647,588 km (0.102 R)
• M87: 84,769,334 km (0.109 R)
• M88: 85,837,014 km (0.111 R)
• M89: 86,238,535 km (0.091 R)
• M90: 87,715,963 km (0.049 R)
• M91: 88,795,761 km (0.108 R)
• M92: 89,744,211 km (0.119 R)
• M93: 90,968,670 km (0.054 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 360 - 17,347 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit