🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.53 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.54

Radius: 0.78

Gravity: 0.89 G

Time & Orbit

Eccentricity (e): 0.132

Orbit Range: 0.46 AU - 0.6 AU

Year: 136 Days

Day: 23.4 Hours

Environment

Temp: 241 °C

Axial Tilt: 34.8 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.81 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.56

Radius: 1.46

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 0.68 AU - 0.94 AU

Year: 256 Days

Day: 13.5 Hours

Environment

Temp: 118 °C

Axial Tilt: 19.2 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 3 - Terrestrial

Semi-Major Axis: 1.46 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.6

Radius: 1.21

Gravity: 1.09 G

Time & Orbit

Eccentricity (e): 0.106

Orbit Range: 1.31 AU - 1.61 AU

Year: 620 Days

Day: 39 Hours

Environment

Temp: 3 °C

Axial Tilt: 129 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 4 - Terrestrial

Semi-Major Axis: 4.25 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.79

Radius: 1.87

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.088

Orbit Range: 3.88 AU - 4.62 AU

Year: 3079 Days

Day: 26 Hours

Environment

Temp: -116 °C

Axial Tilt: 31.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 108,305,933 km

• M1: 3,400,060 km (0.047 R)

Asteroid Belt

Center: 4.98 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 5 - Gas Giant

Semi-Major Axis: 5.7 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 986.9

Radius: 8.8

Gravity: 12.74 G

Time & Orbit

Eccentricity (e): 0.235

Orbit Range: 4.36 AU - 7.04 AU

Year: 4783 Days

Day: 14.4 Hours

Environment

Temp: -135 °C

Axial Tilt: 6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 108,305,933 km

• M1: 189,092 km (0.074 R)
• M2: 414,087 km (0.048 R)
• M3: 478,414 km (0.102 R)
• M4: 643,720 km (0.055 R)
• M5: 870,211 km (0.077 R)
• M6: 970,890 km (0.103 R)
• M7: 1,264,401 km (0.118 R)
• M8: 1,674,150 km (0.116 R)
• M9: 1,801,158 km (0.119 R)
• M10: 2,007,454 km (0.114 R)
• M11: 2,484,073 km (0.098 R)
• M12: 2,671,668 km (0.11 R)
• M13: 2,864,051 km (0.052 R)
• M14: 3,061,072 km (0.095 R)
• M15: 3,285,169 km (0.073 R)
• M16: 3,561,177 km (0.104 R)
• M17: 4,160,466 km (0.109 R)
• M18: 4,611,205 km (0.093 R)
• M19: 4,998,813 km (0.072 R)
• M20: 5,316,409 km (0.12 R)
• M21: 5,777,769 km (0.055 R)
• M22: 5,971,498 km (0.094 R)
• M23: 6,251,845 km (0.071 R)
• M24: 6,507,956 km (0.084 R)
• M25: 6,767,658 km (0.108 R)
• M26: 7,356,625 km (0.067 R)
• M27: 7,506,522 km (0.064 R)
• M28: 8,489,230 km (0.077 R)
• M29: 8,552,061 km (0.09 R)
• M30: 9,059,797 km (0.099 R)
• M31: 9,806,739 km (0.085 R)
• M32: 10,271,091 km (0.103 R)
• M33: 10,641,046 km (0.082 R)
• M34: 11,118,114 km (0.074 R)
• M35: 12,448,039 km (0.103 R)
• M36: 12,806,475 km (0.064 R)
• M37: 13,204,555 km (0.093 R)
• M38: 13,386,765 km (0.067 R)
• M39: 13,643,475 km (0.047 R)
• M40: 13,827,780 km (0.043 R)
• M41: 14,723,871 km (0.079 R)
• M42: 14,837,117 km (0.057 R)
• M43: 14,912,963 km (0.11 R)
• M44: 15,178,948 km (0.108 R)
• M45: 15,561,769 km (0.086 R)
• M46: 16,141,909 km (0.117 R)
• M47: 16,454,120 km (0.086 R)
• M48: 17,323,284 km (0.034 R)
• M49: 17,562,940 km (0.041 R)
• M50: 18,207,407 km (0.098 R)
• M51: 18,573,324 km (0.076 R)
• M52: 18,654,854 km (0.118 R)
• M53: 18,818,515 km (0.025 R)
• M54: 19,229,759 km (0.082 R)
• M55: 19,477,792 km (0.037 R)
• M56: 20,565,369 km (0.118 R)
• M57: 20,692,078 km (0.09 R)
• M58: 21,672,393 km (0.105 R)
• M59: 21,973,833 km (0.109 R)
• M60: 22,667,967 km (0.102 R)
• M61: 22,755,183 km (0.085 R)
• M62: 22,886,230 km (0.08 R)
• M63: 23,325,150 km (0.115 R)
• M64: 23,633,920 km (0.108 R)
• M65: 24,122,058 km (0.056 R)
• M66: 24,344,959 km (0.041 R)
• M67: 24,479,148 km (0.102 R)
• M68: 24,837,884 km (0.12 R)
• M69: 25,198,565 km (0.055 R)
• M70: 25,424,757 km (0.115 R)
• M71: 25,515,413 km (0.052 R)
• M72: 25,606,219 km (0.115 R)
• M73: 25,924,862 km (0.079 R)
• M74: 26,980,874 km (0.111 R)
• M75: 27,444,477 km (0.118 R)
• M76: 27,630,577 km (0.045 R)
• M77: 27,817,275 km (0.081 R)
• M78: 30,714,088 km (0.11 R)
• M79: 31,149,568 km (0.057 R)
• M80: 31,246,657 km (0.107 R)
• M81: 31,343,746 km (0.049 R)
• M82: 32,124,647 km (0.077 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.29 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 105

Radius: 11.6

Gravity: 0.78 G

Time & Orbit

Eccentricity (e): 0.095

Orbit Range: 5.69 AU - 6.89 AU

Year: 5544 Days

Day: 12.5 Hours

Environment

Temp: -145 °C

Axial Tilt: 23.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (49)

Outer Limit: 108,305,933 km

• M1: 175,777 km (0.105 R)
• M2: 428,747 km (0.098 R)
• M3: 631,153 km (0.088 R)
• M4: 703,559 km (0.086 R)
• M5: 1,043,595 km (0.108 R)
• M6: 1,316,012 km (0.103 R)
• M7: 1,401,134 km (0.119 R)
• M8: 1,488,349 km (0.091 R)
• M9: 1,577,360 km (0.052 R)
• M10: 1,691,354 km (0.068 R)
• M11: 1,784,703 km (0.106 R)
• M12: 1,915,900 km (0.088 R)
• M13: 2,037,972 km (0.112 R)
• M14: 2,825,455 km (0.046 R)
• M15: 3,078,874 km (0.093 R)
• M16: 3,237,597 km (0.063 R)
• M17: 3,428,484 km (0.106 R)
• M18: 3,714,515 km (0.119 R)
• M19: 4,102,572 km (0.079 R)
• M20: 4,634,991 km (0.094 R)
• M21: 4,800,745 km (0.104 R)
• M22: 5,361,588 km (0.109 R)
• M23: 5,518,067 km (0.082 R)
• M24: 5,658,539 km (0.06 R)
• M25: 5,979,128 km (0.064 R)
• M26: 6,712,606 km (0.066 R)
• M27: 6,900,351 km (0.107 R)
• M28: 7,051,894 km (0.094 R)
• M29: 7,338,972 km (0.09 R)
• M30: 7,571,597 km (0.119 R)
• M31: 7,767,121 km (0.093 R)
• M32: 7,865,557 km (0.118 R)
• M33: 8,243,441 km (0.08 R)
• M34: 8,872,799 km (0.031 R)
• M35: 9,079,244 km (0.071 R)
• M36: 10,437,144 km (0.089 R)
• M37: 10,764,614 km (0.103 R)
• M38: 11,971,270 km (0.06 R)
• M39: 12,176,668 km (0.09 R)
• M40: 12,383,113 km (0.063 R)
• M41: 12,475,266 km (0.101 R)
• M42: 13,220,562 km (0.115 R)
• M43: 13,314,659 km (0.105 R)
• M44: 14,681,086 km (0.085 R)
• M45: 14,803,009 km (0.098 R)
• M46: 14,949,914 km (0.032 R)
• M47: 15,418,155 km (0.117 R)
• M48: 16,116,777 km (0.072 R)
• M49: 17,055,952 km (0.103 R)

Planet 7 - Ice Giant

Semi-Major Axis: 13.15 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 400.7

Radius: 6.9

Gravity: 8.42 G

Time & Orbit

Eccentricity (e): 0.11

Orbit Range: 11.7 AU - 14.6 AU

Year: 16760 Days

Day: 20.8 Hours

Environment

Temp: -174 °C

Axial Tilt: 13.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 108,305,933 km

• M1: 118,930 km (0.081 R)
• M2: 169,494 km (0.101 R)
• M3: 364,720 km (0.072 R)
• M4: 424,409 km (0.062 R)
• M5: 1,387,670 km (0.107 R)
• M6: 1,765,704 km (0.105 R)
• M7: 2,146,131 km (0.067 R)
• M8: 2,702,486 km (0.038 R)
• M9: 3,204,087 km (0.096 R)
• M10: 3,599,026 km (0.082 R)
• M11: 3,734,262 km (0.102 R)
• M12: 4,009,522 km (0.119 R)
• M13: 4,079,384 km (0.109 R)
• M14: 4,149,546 km (0.105 R)
• M15: 4,398,776 km (0.075 R)
• M16: 4,579,640 km (0.067 R)
• M17: 5,676,790 km (0.063 R)
• M18: 5,873,811 km (0.073 R)
• M19: 6,113,317 km (0.102 R)
• M20: 6,234,192 km (0.09 R)
• M21: 6,396,805 km (0.058 R)
• M22: 6,767,508 km (0.093 R)
• M23: 6,850,834 km (0.109 R)
• M24: 8,453,327 km (0.06 R)
• M25: 9,739,420 km (0.102 R)
• M26: 10,356,960 km (0.116 R)
• M27: 10,597,812 km (0.065 R)
• M28: 11,579,922 km (0.113 R)
• M29: 11,779,785 km (0.107 R)
• M30: 13,054,808 km (0.118 R)
• M31: 13,840,795 km (0.067 R)
• M32: 14,319,658 km (0.053 R)
• M33: 15,075,277 km (0.03 R)
• M34: 15,733,358 km (0.046 R)
• M35: 16,177,215 km (0.095 R)
• M36: 16,456,663 km (0.099 R)
• M37: 16,512,763 km (0.103 R)
• M38: 16,907,252 km (0.11 R)
• M39: 17,077,345 km (0.09 R)
• M40: 17,361,880 km (0.108 R)
• M41: 17,935,887 km (0.116 R)
• M42: 19,993,157 km (0.069 R)
• M43: 21,140,872 km (0.082 R)
• M44: 21,691,990 km (0.103 R)
• M45: 22,247,747 km (0.115 R)
• M46: 22,745,758 km (0.098 R)
• M47: 22,808,290 km (0.1 R)
• M48: 24,197,904 km (0.1 R)
• M49: 24,903,109 km (0.066 R)
• M50: 26,398,938 km (0.118 R)
• M51: 26,530,434 km (0.106 R)
• M52: 27,124,637 km (0.111 R)
• M53: 27,456,744 km (0.119 R)
• M54: 28,393,526 km (0.092 R)
• M55: 28,730,720 km (0.111 R)
• M56: 28,865,956 km (0.087 R)
• M57: 30,229,840 km (0.06 R)
• M58: 30,505,100 km (0.12 R)
• M59: 30,919,636 km (0.096 R)
• M60: 32,174,164 km (0.062 R)
• M61: 32,807,711 km (0.061 R)
• M62: 32,878,321 km (0.096 R)
• M63: 33,445,446 km (0.03 R)
• M64: 34,445,359 km (0.065 R)
• M65: 34,804,992 km (0.12 R)
• M66: 35,745,514 km (0.088 R)
• M67: 35,818,218 km (0.112 R)
• M68: 36,036,631 km (0.084 R)
• M69: 36,547,957 km (0.099 R)
• M70: 38,096,295 km (0.034 R)
• M71: 38,468,045 km (0.078 R)
• M72: 42,790,825 km (0.077 R)
• M73: 44,031,590 km (0.078 R)
• M74: 46,231,277 km (0.091 R)
• M75: 47,264,699 km (0.063 R)
• M76: 47,904,380 km (0.091 R)
• M77: 48,385,935 km (0.069 R)
• M78: 49,516,147 km (0.028 R)
• M79: 49,678,311 km (0.073 R)
• M80: 50,491,675 km (0.059 R)
• M81: 51,227,547 km (0.12 R)
• M82: 51,391,506 km (0.085 R)
• M83: 51,555,765 km (0.079 R)
• M84: 51,637,894 km (0.089 R)
• M85: 52,214,145 km (0.062 R)
• M86: 53,290,053 km (0.102 R)
• M87: 53,705,935 km (0.053 R)
• M88: 54,039,239 km (0.111 R)
• M89: 54,624,316 km (0.061 R)

Planet 8 - Ice Giant

Semi-Major Axis: 19.67 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 106.9

Radius: 7.9

Gravity: 1.71 G

Time & Orbit

Eccentricity (e): 0.188

Orbit Range: 15.97 AU - 23.37 AU

Year: 30661 Days

Day: 22.6 Hours

Environment

Temp: -187 °C

Axial Tilt: 9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 108,305,933 km

• M1: 103,073 km (0.115 R)
• M2: 218,712 km (0.098 R)
• M3: 300,393 km (0.098 R)
• M4: 1,126,771 km (0.118 R)
• M5: 1,817,465 km (0.067 R)
• M6: 1,895,405 km (0.082 R)
• M7: 2,054,727 km (0.032 R)
• M8: 2,136,108 km (0.087 R)
• M9: 2,274,037 km (0.105 R)
• M10: 2,386,535 km (0.071 R)
• M11: 2,946,180 km (0.09 R)
• M12: 3,162,349 km (0.098 R)
• M13: 3,512,708 km (0.072 R)
• M14: 4,078,337 km (0.101 R)
• M15: 4,494,668 km (0.038 R)
• M16: 4,960,965 km (0.102 R)
• M17: 5,405,121 km (0.117 R)
• M18: 6,252,293 km (0.065 R)
• M19: 6,610,730 km (0.066 R)
• M20: 7,016,739 km (0.111 R)
• M21: 7,305,911 km (0.105 R)
• M22: 7,514,899 km (0.08 R)
• M23: 7,768,169 km (0.116 R)
• M24: 8,457,366 km (0.059 R)
• M25: 8,720,808 km (0.087 R)
• M26: 9,709,949 km (0.107 R)
• M27: 9,893,655 km (0.056 R)
• M28: 9,985,957 km (0.077 R)
• M29: 11,019,529 km (0.096 R)
• M30: 11,307,355 km (0.091 R)
• M31: 12,483,344 km (0.081 R)
• M32: 13,035,210 km (0.072 R)
• M33: 13,543,843 km (0.102 R)
• M34: 14,580,407 km (0.099 R)
• M35: 15,481,584 km (0.111 R)
• M36: 15,535,140 km (0.088 R)
• M37: 16,182,750 km (0.106 R)
• M38: 16,729,231 km (0.053 R)
• M39: 17,560,247 km (0.054 R)
• M40: 18,404,577 km (0.065 R)
• M41: 18,803,256 km (0.113 R)
• M42: 20,016,046 km (0.113 R)
• M43: 21,432,737 km (0.092 R)
• M44: 21,671,944 km (0.117 R)
• M45: 22,274,076 km (0.062 R)
• M46: 23,003,665 km (0.102 R)
• M47: 24,424,096 km (0.11 R)
• M48: 24,736,606 km (0.082 R)
• M49: 27,608,586 km (0.109 R)
• M50: 28,260,983 km (0.08 R)
• M51: 29,182,805 km (0.1 R)
• M52: 32,280,677 km (0.114 R)
• M53: 35,551,934 km (0.1 R)
• M54: 36,760,984 km (0.109 R)
• M55: 37,766,730 km (0.112 R)
• M56: 39,292,180 km (0.08 R)
• M57: 39,511,790 km (0.096 R)
• M58: 39,878,604 km (0.085 R)
• M59: 40,099,260 km (0.094 R)
• M60: 40,689,723 km (0.103 R)
• M61: 40,911,876 km (0.069 R)
• M62: 41,134,478 km (0.113 R)
• M63: 43,004,601 km (0.087 R)
• M64: 43,306,489 km (0.119 R)
• M65: 44,216,044 km (0.077 R)
• M66: 44,368,335 km (0.085 R)
• M67: 44,902,399 km (0.094 R)
• M68: 45,285,220 km (0.036 R)
• M69: 45,746,131 km (0.083 R)
• M70: 47,060,199 km (0.095 R)
• M71: 48,700,540 km (0.06 R)
• M72: 49,093,832 km (0.108 R)
• M73: 49,251,509 km (0.058 R)
• M74: 51,076,303 km (0.107 R)
• M75: 51,315,959 km (0.073 R)
• M76: 52,681,040 km (0.069 R)
• M77: 53,732,862 km (0.05 R)
• M78: 53,976,707 km (0.086 R)
• M79: 54,139,320 km (0.059 R)
• M80: 54,465,144 km (0.039 R)

Planet 9 - Ice Giant

Semi-Major Axis: 20.57 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 735

Radius: 5.5

Gravity: 24.3 G

Time & Orbit

Eccentricity (e): 0.198

Orbit Range: 16.5 AU - 24.64 AU

Year: 32789 Days

Day: 18.7 Hours

Environment

Temp: -200 °C

Axial Tilt: 19.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (98)

Outer Limit: 108,305,933 km

• M1: 247,734 km (0.082 R)
• M2: 630,854 km (0.118 R)
• M3: 746,942 km (0.053 R)
• M4: 838,795 km (0.108 R)
• M5: 1,426,565 km (0.077 R)
• M6: 1,903,633 km (0.094 R)
• M7: 2,247,259 km (0.065 R)
• M8: 3,039,679 km (0.104 R)
• M9: 3,237,747 km (0.082 R)
• M10: 3,594,388 km (0.108 R)
• M11: 3,910,040 km (0.068 R)
• M12: 6,168,668 km (0.057 R)
• M13: 6,482,674 km (0.103 R)
• M14: 7,125,945 km (0.071 R)
• M15: 7,388,938 km (0.114 R)
• M16: 8,403,212 km (0.108 R)
• M17: 8,541,739 km (0.118 R)
• M18: 10,262,115 km (0.047 R)
• M19: 11,009,655 km (0.099 R)
• M20: 12,320,282 km (0.097 R)
• M21: 12,477,659 km (0.114 R)
• M22: 13,113,899 km (0.104 R)
• M23: 14,335,216 km (0.059 R)
• M24: 15,422,792 km (0.042 R)
• M25: 16,536,549 km (0.093 R)
• M26: 16,797,298 km (0.09 R)
• M27: 16,971,878 km (0.106 R)
• M28: 17,853,608 km (0.081 R)
• M29: 18,931,311 km (0.114 R)
• M30: 20,400,811 km (0.065 R)
• M31: 21,811,370 km (0.094 R)
• M32: 23,447,671 km (0.037 R)
• M33: 23,740,584 km (0.111 R)
• M34: 24,034,544 km (0.108 R)
• M35: 26,430,204 km (0.108 R)
• M36: 26,633,208 km (0.046 R)
• M37: 27,347,987 km (0.046 R)
• M38: 28,172,421 km (0.047 R)
• M39: 28,796,244 km (0.109 R)
• M40: 29,005,232 km (0.037 R)
• M41: 29,319,537 km (0.048 R)
• M42: 29,951,588 km (0.045 R)
• M43: 30,163,269 km (0.085 R)
• M44: 31,982,529 km (0.085 R)
• M45: 34,057,601 km (0.033 R)
• M46: 34,389,259 km (0.096 R)
• M47: 34,499,962 km (0.076 R)
• M48: 36,288,404 km (0.12 R)
• M49: 38,681,073 km (0.113 R)
• M50: 39,954,599 km (0.085 R)
• M51: 41,595,239 km (0.054 R)
• M52: 44,097,114 km (0.059 R)
• M53: 46,157,974 km (0.089 R)
• M54: 46,647,458 km (0.08 R)
• M55: 47,508,095 km (0.106 R)
• M56: 49,369,990 km (0.113 R)
• M57: 51,889,368 km (0.068 R)
• M58: 52,143,535 km (0.036 R)
• M59: 52,908,728 km (0.052 R)
• M60: 53,806,165 km (0.11 R)
• M61: 53,934,670 km (0.114 R)
• M62: 54,708,540 km (0.104 R)
• M63: 56,789,895 km (0.084 R)
• M64: 57,445,732 km (0.077 R)
• M65: 59,029,674 km (0.082 R)
• M66: 61,566,854 km (0.08 R)
• M67: 63,458,968 km (0.106 R)
• M68: 64,412,206 km (0.119 R)
• M69: 64,685,521 km (0.104 R)
• M70: 69,388,878 km (0.063 R)
• M71: 69,668,925 km (0.1 R)
• M72: 70,230,216 km (0.062 R)
• M73: 70,370,689 km (0.039 R)
• M74: 70,793,004 km (0.084 R)
• M75: 72,632,309 km (0.109 R)
• M76: 73,059,112 km (0.077 R)
• M77: 74,200,993 km (0.055 R)
• M78: 76,502,556 km (0.096 R)
• M79: 77,662,089 km (0.097 R)
• M80: 77,807,498 km (0.04 R)
• M81: 78,244,025 km (0.078 R)
• M82: 81,175,545 km (0.1 R)
• M83: 81,766,007 km (0.109 R)
• M84: 83,695,371 km (0.056 R)
• M85: 85,189,555 km (0.09 R)
• M86: 85,489,349 km (0.088 R)
• M87: 92,021,540 km (0.093 R)
• M88: 93,408,910 km (0.071 R)
• M89: 93,563,445 km (0.108 R)
• M90: 96,204,296 km (0.062 R)
• M91: 96,360,476 km (0.103 R)
• M92: 97,926,168 km (0.091 R)
• M93: 98,240,323 km (0.117 R)
• M94: 99,974,163 km (0.031 R)
• M95: 104,593,296 km (0.092 R)
• M96: 104,753,815 km (0.051 R)
• M97: 107,981,389 km (0.104 R)
• M98: 108,305,866 km (0.113 R)

Kuiper Belt

Range: 31.2 - 48.2 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 543 - 13,735 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit