🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.52 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.56

Radius: 1.46

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.239

Orbit Range: 0.4 AU - 0.64 AU

Year: 134 Days

Day: 28.6 Hours

Environment

Temp: 202 °C

Axial Tilt: 12.6 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 72,470,241 km

• M1: 296,503 km (0.114 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.5 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.22

Radius: 1.6

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.243

Orbit Range: 1.14 AU - 1.86 AU

Year: 658 Days

Day: 26 Hours

Environment

Temp: -33 °C

Axial Tilt: 11.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 3.93 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.69

Radius: 0.86

Gravity: 0.93 G

Time & Orbit

Eccentricity (e): 0.194

Orbit Range: 3.17 AU - 4.69 AU

Year: 2790 Days

Day: 20.1 Hours

Environment

Temp: -128 °C

Axial Tilt: 39.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 72,470,241 km

• M1: 25,731 km (0.116 R)
• M2: 697,874 km (0.102 R)

Planet 4 - Gas Giant

Semi-Major Axis: 6.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 180.3

Radius: 13.9

Gravity: 0.93 G

Time & Orbit

Eccentricity (e): 0.035

Orbit Range: 6.48 AU - 6.94 AU

Year: 6225 Days

Day: 7.4 Hours

Environment

Temp: -144 °C

Axial Tilt: 35.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (67)

Outer Limit: 72,470,241 km

• M1: 277,055 km (0.07 R)
• M2: 436,377 km (0.096 R)
• M3: 694,733 km (0.086 R)
• M4: 803,191 km (0.086 R)
• M5: 918,232 km (0.05 R)
• M6: 1,016,966 km (0.083 R)
• M7: 1,399,937 km (0.109 R)
• M8: 1,581,848 km (0.11 R)
• M9: 2,220,481 km (0.119 R)
• M10: 2,544,660 km (0.112 R)
• M11: 2,720,736 km (0.09 R)
• M12: 2,834,880 km (0.117 R)
• M13: 3,377,770 km (0.108 R)
• M14: 3,500,889 km (0.119 R)
• M15: 3,607,702 km (0.093 R)
• M16: 3,715,562 km (0.118 R)
• M17: 3,971,524 km (0.117 R)
• M18: 4,271,318 km (0.059 R)
• M19: 4,404,909 km (0.064 R)
• M20: 4,578,742 km (0.081 R)
• M21: 4,774,416 km (0.1 R)
• M22: 5,337,502 km (0.039 R)
• M23: 5,481,715 km (0.104 R)
• M24: 5,752,786 km (0.078 R)
• M25: 6,114,215 km (0.07 R)
• M26: 6,243,467 km (0.094 R)
• M27: 7,402,252 km (0.115 R)
• M28: 7,586,407 km (0.116 R)
• M29: 7,935,868 km (0.091 R)
• M30: 8,338,436 km (0.069 R)
• M31: 8,626,561 km (0.103 R)
• M32: 8,747,586 km (0.026 R)
• M33: 9,188,152 km (0.109 R)
• M34: 9,761,560 km (0.077 R)
• M35: 9,862,539 km (0.114 R)
• M36: 10,269,744 km (0.102 R)
• M37: 10,812,784 km (0.095 R)
• M38: 10,917,204 km (0.066 R)
• M39: 11,206,227 km (0.105 R)
• M40: 11,364,950 km (0.101 R)
• M41: 11,792,052 km (0.106 R)
• M42: 12,306,070 km (0.059 R)
• M43: 12,965,647 km (0.098 R)
• M44: 13,160,274 km (0.109 R)
• M45: 13,299,849 km (0.067 R)
• M46: 13,468,147 km (0.1 R)
• M47: 13,580,644 km (0.107 R)
• M48: 13,721,715 km (0.075 R)
• M49: 14,090,773 km (0.115 R)
• M50: 14,434,399 km (0.117 R)
• M51: 14,607,334 km (0.079 R)
• M52: 15,276,336 km (0.103 R)
• M53: 15,540,975 km (0.079 R)
• M54: 15,659,008 km (0.045 R)
• M55: 16,164,050 km (0.069 R)
• M56: 16,463,694 km (0.085 R)
• M57: 16,554,052 km (0.037 R)
• M58: 16,765,284 km (0.103 R)
• M59: 17,373,698 km (0.108 R)
• M60: 17,496,219 km (0.086 R)
• M61: 17,773,125 km (0.118 R)
• M62: 18,612,369 km (0.1 R)
• M63: 18,706,466 km (0.096 R)
• M64: 19,751,407 km (0.074 R)
• M65: 20,168,336 km (0.099 R)
• M66: 21,502,151 km (0.082 R)
• M67: 22,030,530 km (0.076 R)

Planet 5 - Gas Giant

Semi-Major Axis: 8.38 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 906.3

Radius: 13.5

Gravity: 4.97 G

Time & Orbit

Eccentricity (e): 0.106

Orbit Range: 7.49 AU - 9.27 AU

Year: 8688 Days

Day: 6.1 Hours

Environment

Temp: -157 °C

Axial Tilt: 17.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 72,470,241 km

• M1: 175,777 km (0.105 R)
• M2: 549,922 km (0.076 R)
• M3: 869,612 km (0.076 R)
• M4: 1,478,625 km (0.059 R)
• M5: 1,587,981 km (0.093 R)
• M6: 1,700,479 km (0.045 R)
• M7: 2,457,594 km (0.076 R)
• M8: 2,588,941 km (0.073 R)
• M9: 3,367,897 km (0.118 R)
• M10: 3,693,272 km (0.091 R)
• M11: 3,997,853 km (0.119 R)
• M12: 4,342,677 km (0.071 R)
• M13: 4,697,074 km (0.109 R)
• M14: 4,960,965 km (0.108 R)
• M15: 5,162,024 km (0.118 R)
• M16: 5,400,034 km (0.069 R)
• M17: 5,503,257 km (0.105 R)
• M18: 6,207,863 km (0.117 R)
• M19: 6,316,022 km (0.09 R)
• M20: 6,940,892 km (0.099 R)
• M21: 7,394,024 km (0.059 R)
• M22: 8,013,210 km (0.072 R)
• M23: 8,210,230 km (0.055 R)
• M24: 8,973,179 km (0.07 R)
• M25: 9,550,029 km (0.11 R)
• M26: 10,523,911 km (0.1 R)
• M27: 10,826,548 km (0.081 R)
• M28: 11,618,070 km (0.118 R)
• M29: 12,110,995 km (0.047 R)
• M30: 12,748,282 km (0.11 R)
• M31: 13,396,489 km (0.118 R)
• M32: 14,532,685 km (0.068 R)
• M33: 14,966,669 km (0.09 R)
• M34: 15,454,058 km (0.078 R)
• M35: 16,394,281 km (0.077 R)
• M36: 16,695,122 km (0.083 R)
• M37: 17,251,327 km (0.052 R)
• M38: 17,353,054 km (0.052 R)
• M39: 18,174,645 km (0.105 R)
• M40: 18,694,498 km (0.096 R)
• M41: 18,956,294 km (0.097 R)
• M42: 19,536,584 km (0.105 R)
• M43: 19,908,933 km (0.079 R)
• M44: 20,768,672 km (0.076 R)
• M45: 20,985,440 km (0.069 R)
• M46: 22,580,153 km (0.083 R)
• M47: 23,139,051 km (0.044 R)
• M48: 23,872,379 km (0.082 R)
• M49: 24,156,466 km (0.067 R)
• M50: 24,441,749 km (0.111 R)
• M51: 24,728,079 km (0.119 R)
• M52: 25,768,233 km (0.093 R)
• M53: 26,763,657 km (0.12 R)
• M54: 27,831,337 km (0.066 R)
• M55: 28,671,479 km (0.099 R)
• M56: 29,155,129 km (0.051 R)
• M57: 29,519,849 km (0.102 R)
• M58: 29,824,879 km (0.054 R)
• M59: 30,192,291 km (0.044 R)
• M60: 31,117,255 km (0.094 R)
• M61: 31,241,271 km (0.099 R)
• M62: 33,248,426 km (0.073 R)
• M63: 33,565,723 km (0.071 R)
• M64: 34,139,580 km (0.103 R)
• M65: 34,780,907 km (0.117 R)
• M66: 34,974,037 km (0.101 R)
• M67: 35,232,243 km (0.034 R)
• M68: 36,925,542 km (0.098 R)
• M69: 37,320,181 km (0.119 R)
• M70: 38,113,349 km (0.117 R)
• M71: 38,578,748 km (0.085 R)
• M72: 40,053,334 km (0.12 R)
• M73: 41,001,336 km (0.057 R)
• M74: 42,437,176 km (0.046 R)
• M75: 42,574,806 km (0.091 R)
• M76: 43,334,314 km (0.059 R)
• M77: 43,820,059 km (0.074 R)
• M78: 44,237,736 km (0.077 R)
• M79: 44,936,956 km (0.089 R)
• M80: 45,639,767 km (0.084 R)
• M81: 46,063,129 km (0.059 R)
• M82: 47,412,652 km (0.094 R)
• M83: 47,626,876 km (0.107 R)
• M84: 47,913,056 km (0.112 R)

Planet 6 - Gas Giant

Semi-Major Axis: 8.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 191.1

Radius: 11.7

Gravity: 1.4 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 7.51 AU - 10.47 AU

Year: 9654 Days

Day: 10.7 Hours

Environment

Temp: -166 °C

Axial Tilt: 24.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 72,470,241 km

• M1: 150,495 km (0.108 R)
• M2: 371,003 km (0.049 R)
• M3: 445,951 km (0.099 R)
• M4: 733,778 km (0.078 R)
• M5: 834,457 km (0.082 R)
• M6: 1,022,950 km (0.116 R)
• M7: 1,475,035 km (0.037 R)
• M8: 1,638,994 km (0.108 R)
• M9: 2,039,617 km (0.109 R)
• M10: 2,355,418 km (0.04 R)
• M11: 2,470,758 km (0.034 R)
• M12: 3,770,315 km (0.119 R)
• M13: 4,020,293 km (0.096 R)
• M14: 4,705,152 km (0.112 R)
• M15: 4,802,540 km (0.099 R)
• M16: 5,123,727 km (0.097 R)
• M17: 5,451,795 km (0.108 R)
• M18: 5,996,481 km (0.096 R)
• M19: 6,288,795 km (0.079 R)
• M20: 6,369,279 km (0.098 R)
• M21: 6,612,974 km (0.047 R)
• M22: 7,221,688 km (0.053 R)
• M23: 7,877,225 km (0.108 R)
• M24: 8,256,306 km (0.074 R)
• M25: 8,344,569 km (0.085 R)
• M26: 8,641,222 km (0.114 R)
• M27: 8,851,108 km (0.099 R)
• M28: 9,275,666 km (0.047 R)
• M29: 9,925,071 km (0.11 R)
• M30: 10,019,018 km (0.11 R)
• M31: 10,461,678 km (0.047 R)
• M32: 10,942,935 km (0.057 R)
• M33: 11,497,045 km (0.117 R)
• M34: 11,893,779 km (0.086 R)
• M35: 12,871,102 km (0.07 R)
• M36: 13,560,149 km (0.119 R)
• M37: 13,804,144 km (0.114 R)
• M38: 13,979,323 km (0.12 R)
• M39: 14,794,781 km (0.111 R)
• M40: 16,065,016 km (0.114 R)
• M41: 16,249,321 km (0.103 R)
• M42: 16,918,622 km (0.094 R)
• M43: 17,143,766 km (0.118 R)
• M44: 17,445,505 km (0.117 R)
• M45: 17,901,480 km (0.083 R)
• M46: 18,016,072 km (0.096 R)
• M47: 18,825,097 km (0.109 R)
• M48: 19,136,410 km (0.12 R)
• M49: 19,292,740 km (0.084 R)
• M50: 19,370,979 km (0.107 R)
• M51: 19,449,518 km (0.1 R)
• M52: 19,724,778 km (0.083 R)
• M53: 22,178,034 km (0.108 R)
• M54: 22,260,163 km (0.117 R)
• M55: 22,795,873 km (0.086 R)
• M56: 23,169,419 km (0.105 R)
• M57: 23,712,459 km (0.066 R)
• M58: 23,964,532 km (0.099 R)
• M59: 24,598,527 km (0.041 R)
• M60: 25,366,713 km (0.115 R)
• M61: 25,452,432 km (0.092 R)
• M62: 25,581,385 km (0.063 R)
• M63: 25,796,806 km (0.064 R)
• M64: 26,708,007 km (0.091 R)
• M65: 27,189,413 km (0.097 R)
• M66: 27,541,417 km (0.058 R)
• M67: 27,717,942 km (0.077 R)
• M68: 27,894,917 km (0.084 R)
• M69: 28,161,051 km (0.096 R)
• M70: 28,785,173 km (0.116 R)
• M71: 29,143,909 km (0.069 R)
• M72: 29,278,846 km (0.092 R)
• M73: 29,459,112 km (0.117 R)
• M74: 29,639,677 km (0.069 R)
• M75: 29,911,197 km (0.057 R)
• M76: 30,548,035 km (0.11 R)

Planet 7 - Gas Giant

Semi-Major Axis: 11.87 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 732.8

Radius: 14

Gravity: 3.74 G

Time & Orbit

Eccentricity (e): 0.064

Orbit Range: 11.11 AU - 12.63 AU

Year: 14647 Days

Day: 7.3 Hours

Environment

Temp: -186 °C

Axial Tilt: 39.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 72,470,241 km

• M1: 203,453 km (0.098 R)
• M2: 339,288 km (0.038 R)
• M3: 604,824 km (0.074 R)
• M4: 987,346 km (0.098 R)
• M5: 1,243,158 km (0.041 R)
• M6: 1,820,157 km (0.091 R)
• M7: 2,049,491 km (0.042 R)
• M8: 2,198,042 km (0.103 R)
• M9: 2,665,236 km (0.088 R)
• M10: 3,691,627 km (0.115 R)
• M11: 3,947,589 km (0.117 R)
• M12: 4,593,552 km (0.066 R)
• M13: 4,909,204 km (0.118 R)
• M14: 5,150,655 km (0.085 R)
• M15: 6,285,205 km (0.1 R)
• M16: 6,858,614 km (0.109 R)
• M17: 7,129,087 km (0.107 R)
• M18: 7,773,554 km (0.11 R)
• M19: 8,150,391 km (0.086 R)
• M20: 8,245,535 km (0.07 R)
• M21: 8,341,128 km (0.079 R)
• M22: 9,118,589 km (0.118 R)
• M23: 9,767,395 km (0.116 R)
• M24: 10,431,160 km (0.072 R)
• M25: 10,534,682 km (0.119 R)
• M26: 10,742,623 km (0.086 R)
• M27: 11,056,928 km (0.117 R)
• M28: 11,587,851 km (0.101 R)
• M29: 11,856,379 km (0.118 R)
• M30: 12,181,306 km (0.062 R)
• M31: 12,399,569 km (0.065 R)
• M32: 12,509,224 km (0.107 R)
• M33: 12,619,328 km (0.059 R)
• M34: 13,680,127 km (0.099 R)
• M35: 14,422,282 km (0.109 R)
• M36: 15,119,258 km (0.074 R)
• M37: 17,030,820 km (0.083 R)
• M38: 17,829,074 km (0.091 R)
• M39: 17,952,941 km (0.086 R)
• M40: 20,425,794 km (0.102 R)
• M41: 20,750,421 km (0.111 R)
• M42: 20,880,871 km (0.106 R)
• M43: 21,668,803 km (0.092 R)
• M44: 24,227,674 km (0.097 R)
• M45: 26,033,021 km (0.113 R)
• M46: 28,458,452 km (0.047 R)
• M47: 28,748,672 km (0.052 R)
• M48: 28,894,081 km (0.108 R)
• M49: 29,551,414 km (0.055 R)
• M50: 30,139,932 km (0.08 R)
• M51: 30,435,687 km (0.082 R)
• M52: 32,154,716 km (0.102 R)
• M53: 32,532,600 km (0.094 R)
• M54: 32,835,985 km (0.082 R)
• M55: 34,908,065 km (0.088 R)
• M56: 35,608,183 km (0.082 R)
• M57: 35,764,363 km (0.114 R)
• M58: 38,454,731 km (0.07 R)
• M59: 39,258,371 km (0.108 R)
• M60: 39,581,353 km (0.083 R)
• M61: 41,045,916 km (0.032 R)
• M62: 42,032,065 km (0.091 R)
• M63: 42,693,736 km (0.117 R)
• M64: 43,025,993 km (0.098 R)
• M65: 44,615,620 km (0.057 R)
• M66: 46,565,479 km (0.101 R)
• M67: 46,821,890 km (0.12 R)
• M68: 47,336,057 km (0.098 R)
• M69: 47,593,815 km (0.052 R)
• M70: 47,938,338 km (0.071 R)
• M71: 48,283,610 km (0.087 R)
• M72: 48,803,014 km (0.094 R)
• M73: 49,150,380 km (0.1 R)
• M74: 50,022,386 km (0.074 R)
• M75: 50,723,552 km (0.076 R)
• M76: 51,075,406 km (0.06 R)
• M77: 52,313,328 km (0.053 R)
• M78: 52,668,773 km (0.092 R)
• M79: 55,541,501 km (0.103 R)
• M80: 56,267,649 km (0.115 R)
• M81: 58,372,790 km (0.093 R)
• M82: 58,464,942 km (0.05 R)
• M83: 59,388,709 km (0.091 R)
• M84: 59,481,310 km (0.071 R)
• M85: 61,344,252 km (0.109 R)
• M86: 62,282,979 km (0.087 R)
• M87: 62,565,420 km (0.104 R)
• M88: 63,226,343 km (0.057 R)

Planet 8 - Ice Giant

Semi-Major Axis: 13.07 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 826.6

Radius: 5

Gravity: 33.06 G

Time & Orbit

Eccentricity (e): 0.132

Orbit Range: 11.34 AU - 14.8 AU

Year: 16923 Days

Day: 19.3 Hours

Environment

Temp: -175 °C

Axial Tilt: 24.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 72,470,241 km

• M1: 195,225 km (0.092 R)
• M2: 331,359 km (0.071 R)
• M3: 438,471 km (0.119 R)
• M4: 663,317 km (0.112 R)
• M5: 1,317,957 km (0.057 R)
• M6: 2,283,611 km (0.103 R)
• M7: 2,561,116 km (0.095 R)
• M8: 2,596,570 km (0.061 R)
• M9: 2,886,042 km (0.047 R)
• M10: 3,223,834 km (0.042 R)
• M11: 3,613,985 km (0.054 R)
• M12: 3,855,137 km (0.102 R)
• M13: 4,018,797 km (0.054 R)
• M14: 4,226,738 km (0.056 R)
• M15: 5,870,520 km (0.104 R)
• M16: 5,964,467 km (0.03 R)
• M17: 6,733,849 km (0.058 R)
• M18: 6,980,536 km (0.079 R)
• M19: 7,180,099 km (0.079 R)
• M20: 7,738,548 km (0.068 R)
• M21: 8,950,740 km (0.072 R)
• M22: 9,167,507 km (0.097 R)
• M23: 9,221,961 km (0.032 R)
• M24: 9,606,278 km (0.079 R)
• M25: 10,390,470 km (0.089 R)
• M26: 10,561,310 km (0.118 R)
• M27: 11,195,157 km (0.081 R)
• M28: 11,370,186 km (0.103 R)
• M29: 11,428,679 km (0.042 R)
• M30: 11,604,905 km (0.094 R)
• M31: 11,722,938 km (0.054 R)
• M32: 12,620,376 km (0.109 R)
• M33: 14,671,362 km (0.12 R)
• M34: 14,735,091 km (0.098 R)
• M35: 16,756,457 km (0.046 R)
• M36: 17,090,659 km (0.117 R)
• M37: 17,359,487 km (0.09 R)
• M38: 17,833,413 km (0.04 R)
• M39: 18,517,673 km (0.116 R)
• M40: 18,655,602 km (0.1 R)
• M41: 19,140,898 km (0.111 R)
• M42: 19,420,048 km (0.086 R)
• M43: 20,764,633 km (0.091 R)
• M44: 21,123,369 km (0.083 R)
• M45: 22,947,865 km (0.109 R)
• M46: 23,691,665 km (0.102 R)
• M47: 24,898,172 km (0.091 R)
• M48: 25,508,831 km (0.114 R)
• M49: 26,124,426 km (0.061 R)
• M50: 26,667,167 km (0.086 R)
• M51: 27,606,043 km (0.059 R)
• M52: 28,635,426 km (0.108 R)
• M53: 29,114,738 km (0.077 R)
• M54: 29,435,775 km (0.102 R)
• M55: 29,596,742 km (0.073 R)
• M56: 29,677,375 km (0.12 R)
• M57: 31,058,463 km (0.119 R)
• M58: 31,798,075 km (0.098 R)
• M59: 32,045,958 km (0.098 R)
• M60: 32,626,697 km (0.068 R)
• M61: 32,709,874 km (0.064 R)
• M62: 33,462,351 km (0.079 R)
• M63: 35,411,013 km (0.057 R)
• M64: 35,753,592 km (0.101 R)
• M65: 35,839,461 km (0.072 R)
• M66: 36,528,509 km (0.106 R)
• M67: 36,788,061 km (0.059 R)
• M68: 39,062,996 km (0.083 R)
• M69: 41,924,803 km (0.117 R)
• M70: 43,839,207 km (0.099 R)
• M71: 44,299,221 km (0.12 R)
• M72: 44,391,373 km (0.078 R)
• M73: 44,483,675 km (0.115 R)
• M74: 44,575,977 km (0.109 R)
• M75: 45,224,035 km (0.072 R)
• M76: 45,968,434 km (0.041 R)
• M77: 49,368,045 km (0.113 R)
• M78: 50,422,860 km (0.047 R)
• M79: 51,097,995 km (0.11 R)
• M80: 52,067,539 km (0.071 R)
• M81: 56,205,865 km (0.115 R)
• M82: 56,305,647 km (0.105 R)
• M83: 57,407,435 km (0.091 R)
• M84: 58,213,169 km (0.116 R)
• M85: 58,516,404 km (0.055 R)
• M86: 59,428,951 km (0.066 R)
• M87: 63,022,142 km (0.082 R)
• M88: 64,792,633 km (0.044 R)
• M89: 66,368,497 km (0.044 R)
• M90: 66,790,812 km (0.109 R)
• M91: 66,896,428 km (0.108 R)
• M92: 70,847,158 km (0.099 R)
• M93: 70,955,018 km (0.09 R)

Kuiper Belt

Range: 30.6 - 46.6 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 368 - 14,911 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit