🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.95 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.97

Radius: 0.99

Gravity: 0.99 G

Time & Orbit

Eccentricity (e): 0.068

Orbit Range: 0.89 AU - 1.01 AU

Year: 345 Days

Day: 44.7 Hours

Environment

Temp: 19 °C

Axial Tilt: 9.9 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 40,427,870 km

• M1: 251,324 km (0.12 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.95 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.88

Radius: 1.89

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.126

Orbit Range: 0.83 AU - 1.07 AU

Year: 345 Days

Day: 13.2 Hours

Environment

Temp: 31 °C

Axial Tilt: 18.8 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 40,427,870 km

• M1: 437,424 km (0.106 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.65 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.41

Radius: 1.63

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.029

Orbit Range: 1.6 AU - 1.7 AU

Year: 790 Days

Day: 47.6 Hours

Environment

Temp: -63 °C

Axial Tilt: 34.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 40,427,870 km

• M1: 102,175 km (0.097 R)
• M2: 306,376 km (0.059 R)

Asteroid Belt

Center: 3.59 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 4 - Gas Giant

Semi-Major Axis: 5.53 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 470.1

Radius: 8.4

Gravity: 6.66 G

Time & Orbit

Eccentricity (e): 0.053

Orbit Range: 5.24 AU - 5.82 AU

Year: 4848 Days

Day: 8.2 Hours

Environment

Temp: -148 °C

Axial Tilt: 25.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 40,427,870 km

• M1: 105,317 km (0.105 R)
• M2: 260,300 km (0.094 R)
• M3: 448,794 km (0.107 R)
• M4: 670,498 km (0.06 R)
• M5: 817,852 km (0.108 R)
• M6: 901,776 km (0.076 R)
• M7: 1,039,705 km (0.109 R)
• M8: 1,211,892 km (0.08 R)
• M9: 1,336,657 km (0.054 R)
• M10: 1,721,124 km (0.075 R)
• M11: 1,877,902 km (0.092 R)
• M12: 1,958,236 km (0.119 R)
• M13: 2,088,985 km (0.113 R)
• M14: 2,222,725 km (0.08 R)
• M15: 2,359,458 km (0.112 R)
• M16: 2,446,224 km (0.073 R)
• M17: 2,516,535 km (0.091 R)
• M18: 2,677,054 km (0.091 R)
• M19: 3,008,413 km (0.053 R)
• M20: 3,159,806 km (0.115 R)
• M21: 3,236,550 km (0.104 R)
• M22: 3,313,892 km (0.107 R)
• M23: 3,470,521 km (0.102 R)
• M24: 3,730,073 km (0.082 R)
• M25: 4,503,195 km (0.11 R)
• M26: 4,633,345 km (0.112 R)
• M27: 4,764,543 km (0.093 R)
• M28: 4,919,227 km (0.027 R)
• M29: 5,165,764 km (0.116 R)
• M30: 5,439,379 km (0.115 R)
• M31: 5,601,094 km (0.064 R)
• M32: 5,694,293 km (0.09 R)
• M33: 5,976,884 km (0.099 R)
• M34: 6,072,028 km (0.085 R)
• M35: 6,143,835 km (0.063 R)
• M36: 6,215,792 km (0.052 R)
• M37: 6,384,987 km (0.094 R)
• M38: 6,901,847 km (0.029 R)
• M39: 7,152,573 km (0.102 R)
• M40: 7,279,133 km (0.09 R)
• M41: 7,663,151 km (0.106 R)
• M42: 7,766,673 km (0.086 R)
• M43: 8,531,267 km (0.104 R)
• M44: 8,746,539 km (0.091 R)
• M45: 8,827,621 km (0.034 R)
• M46: 9,154,642 km (0.104 R)
• M47: 9,237,070 km (0.053 R)
• M48: 9,458,026 km (0.102 R)
• M49: 9,513,527 km (0.099 R)
• M50: 9,877,050 km (0.068 R)
• M51: 10,387,777 km (0.045 R)
• M52: 11,435,112 km (0.041 R)
• M53: 13,099,089 km (0.116 R)
• M54: 13,597,250 km (0.111 R)
• M55: 13,911,704 km (0.074 R)
• M56: 14,260,417 km (0.12 R)
• M57: 14,515,930 km (0.073 R)
• M58: 15,031,295 km (0.104 R)
• M59: 16,346,111 km (0.107 R)
• M60: 16,479,552 km (0.075 R)
• M61: 16,680,462 km (0.099 R)
• M62: 17,288,128 km (0.079 R)
• M63: 17,390,154 km (0.097 R)
• M64: 17,458,221 km (0.088 R)
• M65: 17,594,654 km (0.084 R)
• M66: 17,937,383 km (0.075 R)
• M67: 18,594,567 km (0.095 R)
• M68: 19,048,895 km (0.086 R)
• M69: 19,436,055 km (0.086 R)
• M70: 20,254,056 km (0.065 R)
• M71: 21,447,248 km (0.07 R)
• M72: 21,520,402 km (0.043 R)
• M73: 21,923,568 km (0.072 R)
• M74: 21,997,170 km (0.063 R)
• M75: 22,329,427 km (0.097 R)
• M76: 22,737,680 km (0.1 R)
• M77: 23,561,515 km (0.108 R)
• M78: 23,750,158 km (0.08 R)
• M79: 24,166,788 km (0.078 R)
• M80: 24,585,961 km (0.117 R)
• M81: 24,930,635 km (0.1 R)
• M82: 25,974,379 km (0.102 R)
• M83: 26,091,215 km (0.099 R)

Planet 5 - Gas Giant

Semi-Major Axis: 6.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 308.6

Radius: 8.7

Gravity: 4.08 G

Time & Orbit

Eccentricity (e): 0.029

Orbit Range: 6.35 AU - 6.73 AU

Year: 6235 Days

Day: 5.4 Hours

Environment

Temp: -168 °C

Axial Tilt: 16.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 40,427,870 km

• M1: 112,647 km (0.109 R)
• M2: 195,375 km (0.053 R)
• M3: 261,048 km (0.042 R)
• M4: 510,578 km (0.086 R)
• M5: 1,136,196 km (0.063 R)
• M6: 1,882,091 km (0.085 R)
• M7: 2,130,872 km (0.109 R)
• M8: 2,497,088 km (0.105 R)
• M9: 2,715,351 km (0.092 R)
• M10: 3,035,191 km (0.086 R)
• M11: 3,406,792 km (0.1 R)
• M12: 3,669,636 km (0.086 R)
• M13: 3,938,912 km (0.069 R)
• M14: 4,236,313 km (0.096 R)
• M15: 4,300,939 km (0.078 R)
• M16: 4,562,885 km (0.114 R)
• M17: 4,629,306 km (0.083 R)
• M18: 5,148,411 km (0.118 R)
• M19: 5,997,977 km (0.112 R)
• M20: 6,070,682 km (0.079 R)
• M21: 6,340,107 km (0.065 R)
• M22: 7,043,217 km (0.074 R)
• M23: 7,145,841 km (0.114 R)
• M24: 7,274,645 km (0.067 R)
• M25: 7,744,682 km (0.071 R)
• M26: 7,983,440 km (0.108 R)
• M27: 8,143,958 km (0.072 R)
• M28: 8,577,344 km (0.11 R)
• M29: 8,852,005 km (0.113 R)
• M30: 8,935,032 km (0.078 R)
• M31: 9,522,952 km (0.039 R)
• M32: 10,297,420 km (0.053 R)
• M33: 10,472,150 km (0.118 R)
• M34: 10,765,811 km (0.111 R)
• M35: 10,824,902 km (0.09 R)
• M36: 10,943,234 km (0.099 R)
• M37: 11,091,934 km (0.099 R)
• M38: 11,541,775 km (0.086 R)
• M39: 11,602,212 km (0.115 R)
• M40: 11,967,082 km (0.08 R)
• M41: 12,028,267 km (0.089 R)
• M42: 12,335,691 km (0.108 R)
• M43: 12,864,370 km (0.089 R)
• M44: 12,989,882 km (0.058 R)
• M45: 13,210,390 km (0.073 R)
• M46: 13,815,363 km (0.12 R)
• M47: 14,008,195 km (0.111 R)
• M48: 14,494,388 km (0.114 R)
• M49: 14,821,708 km (0.091 R)
• M50: 14,986,116 km (0.111 R)
• M51: 15,784,221 km (0.095 R)
• M52: 16,222,393 km (0.116 R)
• M53: 16,801,337 km (0.12 R)
• M54: 17,456,276 km (0.084 R)
• M55: 17,525,690 km (0.073 R)
• M56: 17,734,678 km (0.119 R)
• M57: 17,909,259 km (0.118 R)
• M58: 18,542,955 km (0.117 R)
• M59: 18,613,715 km (0.1 R)
• M60: 18,791,288 km (0.07 R)
• M61: 19,040,817 km (0.053 R)
• M62: 19,148,079 km (0.095 R)
• M63: 19,471,060 km (0.112 R)
• M64: 19,832,190 km (0.119 R)
• M65: 20,195,413 km (0.094 R)
• M66: 20,268,268 km (0.104 R)
• M67: 20,450,927 km (0.112 R)
• M68: 22,232,188 km (0.112 R)
• M69: 22,307,436 km (0.069 R)
• M70: 22,382,833 km (0.047 R)
• M71: 22,533,927 km (0.106 R)
• M72: 22,723,169 km (0.09 R)
• M73: 23,103,147 km (0.095 R)
• M74: 23,754,197 km (0.068 R)
• M75: 23,985,326 km (0.118 R)
• M76: 24,139,860 km (0.055 R)
• M77: 24,294,694 km (0.094 R)
• M78: 25,506,287 km (0.042 R)
• M79: 26,457,580 km (0.064 R)
• M80: 26,657,293 km (0.055 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 443.3

Radius: 8.7

Gravity: 5.86 G

Time & Orbit

Eccentricity (e): 0.11

Orbit Range: 6.11 AU - 7.61 AU

Year: 6698 Days

Day: 13.4 Hours

Environment

Temp: -151 °C

Axial Tilt: 5.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 40,427,870 km

• M1: 119,379 km (0.116 R)
• M2: 240,853 km (0.094 R)
• M3: 516,262 km (0.052 R)
• M4: 573,109 km (0.038 R)
• M5: 744,997 km (0.113 R)
• M6: 892,052 km (0.116 R)
• M7: 990,787 km (0.089 R)
• M8: 1,123,480 km (0.096 R)
• M9: 1,262,157 km (0.12 R)
• M10: 1,522,906 km (0.108 R)
• M11: 2,170,665 km (0.112 R)
• M12: 2,266,857 km (0.118 R)
• M13: 2,625,143 km (0.061 R)
• M14: 3,001,232 km (0.114 R)
• M15: 3,597,230 km (0.044 R)
• M16: 3,688,635 km (0.072 R)
• M17: 3,803,975 km (0.079 R)
• M18: 3,967,635 km (0.094 R)
• M19: 4,109,603 km (0.037 R)
• M20: 4,423,160 km (0.104 R)
• M21: 5,488,746 km (0.073 R)
• M22: 6,022,960 km (0.098 R)
• M23: 6,490,154 km (0.114 R)
• M24: 6,685,828 km (0.085 R)
• M25: 6,826,899 km (0.095 R)
• M26: 7,488,421 km (0.106 R)
• M27: 7,841,771 km (0.103 R)
• M28: 8,080,230 km (0.094 R)
• M29: 8,503,592 km (0.102 R)
• M30: 8,810,267 km (0.105 R)
• M31: 8,996,068 km (0.098 R)
• M32: 9,434,689 km (0.1 R)
• M33: 9,656,692 km (0.118 R)
• M34: 9,976,682 km (0.118 R)
• M35: 10,267,650 km (0.084 R)
• M36: 10,332,725 km (0.109 R)
• M37: 10,758,929 km (0.107 R)
• M38: 10,858,113 km (0.082 R)
• M39: 11,257,988 km (0.109 R)
• M40: 11,358,667 km (0.104 R)
• M41: 11,560,923 km (0.107 R)
• M42: 12,278,395 km (0.092 R)
• M43: 12,729,732 km (0.057 R)
• M44: 12,975,072 km (0.112 R)
• M45: 14,261,165 km (0.078 R)
• M46: 14,919,396 km (0.061 R)
• M47: 15,699,848 km (0.099 R)
• M48: 15,812,345 km (0.065 R)
• M49: 16,113,935 km (0.09 R)
• M50: 16,875,986 km (0.058 R)
• M51: 17,338,842 km (0.11 R)
• M52: 17,845,081 km (0.103 R)
• M53: 19,392,671 km (0.056 R)
• M54: 19,473,155 km (0.104 R)
• M55: 19,836,827 km (0.057 R)
• M56: 19,918,059 km (0.112 R)
• M57: 21,231,079 km (0.12 R)
• M58: 21,314,106 km (0.109 R)
• M59: 21,397,133 km (0.041 R)
• M60: 21,688,849 km (0.085 R)
• M61: 21,856,249 km (0.041 R)
• M62: 22,360,693 km (0.072 R)
• M63: 22,529,739 km (0.098 R)
• M64: 22,656,747 km (0.075 R)
• M65: 22,826,391 km (0.098 R)
• M66: 22,953,998 km (0.048 R)
• M67: 23,681,493 km (0.093 R)
• M68: 24,590,599 km (0.099 R)
• M69: 25,115,239 km (0.085 R)
• M70: 25,291,016 km (0.103 R)
• M71: 25,378,980 km (0.081 R)
• M72: 25,511,074 km (0.111 R)
• M73: 26,353,610 km (0.067 R)
• M74: 26,442,920 km (0.065 R)
• M75: 26,755,878 km (0.094 R)
• M76: 26,890,516 km (0.106 R)
• M77: 27,205,270 km (0.061 R)
• M78: 27,385,835 km (0.064 R)
• M79: 27,747,862 km (0.087 R)
• M80: 28,339,671 km (0.102 R)
• M81: 28,705,887 km (0.077 R)
• M82: 29,304,428 km (0.085 R)
• M83: 29,581,932 km (0.044 R)
• M84: 30,093,257 km (0.116 R)
• M85: 30,466,803 km (0.091 R)
• M86: 31,691,860 km (0.034 R)

Planet 7 - Gas Giant

Semi-Major Axis: 9.62 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 542.3

Radius: 10.7

Gravity: 4.74 G

Time & Orbit

Eccentricity (e): 0.084

Orbit Range: 8.81 AU - 10.43 AU

Year: 11123 Days

Day: 13.9 Hours

Environment

Temp: -169 °C

Axial Tilt: 18.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 40,427,870 km

• M1: 134,638 km (0.081 R)
• M2: 343,626 km (0.1 R)
• M3: 745,297 km (0.11 R)
• M4: 848,220 km (0.053 R)
• M5: 993,479 km (0.058 R)
• M6: 1,309,430 km (0.112 R)
• M7: 1,501,065 km (0.114 R)
• M8: 1,794,576 km (0.119 R)
• M9: 1,912,310 km (0.113 R)
• M10: 2,032,736 km (0.073 R)
• M11: 2,155,855 km (0.027 R)
• M12: 2,358,111 km (0.093 R)
• M13: 2,435,453 km (0.114 R)
• M14: 2,619,608 km (0.093 R)
• M15: 2,727,020 km (0.093 R)
• M16: 2,835,777 km (0.098 R)
• M17: 3,460,348 km (0.104 R)
• M18: 4,189,189 km (0.088 R)
• M19: 4,998,065 km (0.089 R)
• M20: 5,064,786 km (0.105 R)
• M21: 5,403,325 km (0.096 R)
• M22: 5,644,627 km (0.083 R)
• M23: 5,889,668 km (0.053 R)
• M24: 6,138,001 km (0.115 R)
• M25: 6,209,658 km (0.03 R)
• M26: 6,498,980 km (0.096 R)
• M27: 6,866,991 km (0.066 R)
• M28: 8,089,505 km (0.095 R)
• M29: 8,485,341 km (0.069 R)
• M30: 8,725,894 km (0.079 R)
• M31: 9,878,097 km (0.08 R)
• M32: 10,343,795 km (0.105 R)
• M33: 10,514,786 km (0.118 R)
• M34: 10,773,291 km (0.047 R)
• M35: 11,917,415 km (0.082 R)
• M36: 12,458,511 km (0.076 R)
• M37: 13,424,614 km (0.088 R)
• M38: 13,517,963 km (0.106 R)
• M39: 13,987,551 km (0.083 R)
• M40: 15,282,170 km (0.096 R)
• M41: 15,968,526 km (0.106 R)
• M42: 16,715,019 km (0.072 R)
• M43: 16,865,664 km (0.095 R)
• M44: 17,523,745 km (0.026 R)
• M45: 18,035,818 km (0.03 R)
• M46: 18,293,576 km (0.111 R)
• M47: 20,292,802 km (0.101 R)
• M48: 20,668,591 km (0.106 R)
• M49: 21,372,599 km (0.09 R)
• M50: 21,700,218 km (0.069 R)
• M51: 22,029,483 km (0.052 R)
• M52: 23,644,243 km (0.045 R)
• M53: 23,926,384 km (0.066 R)
• M54: 24,039,630 km (0.1 R)
• M55: 24,380,414 km (0.037 R)
• M56: 24,494,258 km (0.086 R)
• M57: 25,009,174 km (0.094 R)
• M58: 25,296,701 km (0.114 R)
• M59: 25,759,108 km (0.095 R)
• M60: 25,875,196 km (0.112 R)
• M61: 26,516,522 km (0.103 R)
• M62: 26,809,883 km (0.108 R)
• M63: 27,636,711 km (0.087 R)
• M64: 28,292,249 km (0.096 R)
• M65: 28,471,916 km (0.098 R)
• M66: 32,582,267 km (0.112 R)
• M67: 32,770,610 km (0.092 R)
• M68: 32,959,403 km (0.081 R)
• M69: 33,844,873 km (0.083 R)
• M70: 34,610,066 km (0.043 R)
• M71: 35,639,150 km (0.116 R)
• M72: 38,786,390 km (0.107 R)
• M73: 40,730,563 km (0.045 R)
• M74: 41,340,324 km (0.047 R)
• M75: 41,748,577 km (0.114 R)
• M76: 45,833,347 km (0.11 R)
• M77: 46,397,032 km (0.039 R)
• M78: 46,467,642 km (0.071 R)
• M79: 47,175,689 km (0.091 R)
• M80: 47,246,748 km (0.084 R)
• M81: 47,459,924 km (0.026 R)
• M82: 47,602,342 km (0.049 R)

Planet 8 - Ice Giant

Semi-Major Axis: 13.88 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 110.6

Radius: 5.2

Gravity: 4.09 G

Time & Orbit

Eccentricity (e): 0.119

Orbit Range: 12.23 AU - 15.53 AU

Year: 19277 Days

Day: 17.7 Hours

Environment

Temp: -181 °C

Axial Tilt: 46.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 40,427,870 km

• M1: 131,497 km (0.11 R)
• M2: 274,362 km (0.088 R)
• M3: 571,165 km (0.077 R)
• M4: 764,595 km (0.092 R)
• M5: 1,100,442 km (0.106 R)
• M6: 1,321,996 km (0.106 R)
• M7: 1,437,935 km (0.066 R)
• M8: 2,201,781 km (0.085 R)
• M9: 2,575,627 km (0.115 R)
• M10: 2,893,821 km (0.084 R)
• M11: 2,994,201 km (0.114 R)
• M12: 3,513,605 km (0.104 R)
• M13: 3,620,867 km (0.111 R)
• M14: 3,783,779 km (0.101 R)
• M15: 4,258,154 km (0.072 R)
• M16: 4,372,447 km (0.115 R)
• M17: 4,840,090 km (0.119 R)
• M18: 5,602,141 km (0.088 R)
• M19: 5,822,050 km (0.075 R)
• M20: 6,141,292 km (0.036 R)
• M21: 6,466,218 km (0.081 R)
• M22: 6,630,776 km (0.104 R)
• M23: 6,663,837 km (0.113 R)
• M24: 6,697,048 km (0.089 R)
• M25: 7,612,288 km (0.096 R)
• M26: 8,422,360 km (0.105 R)
• M27: 9,296,610 km (0.076 R)
• M28: 9,407,911 km (0.075 R)
• M29: 10,352,472 km (0.082 R)
• M30: 11,051,244 km (0.074 R)
• M31: 11,644,997 km (0.11 R)
• M32: 11,724,883 km (0.033 R)
• M33: 12,452,676 km (0.104 R)
• M34: 12,822,033 km (0.104 R)
• M35: 13,236,719 km (0.114 R)
• M36: 13,320,194 km (0.086 R)
• M37: 13,994,133 km (0.09 R)
• M38: 14,852,077 km (0.065 R)
• M39: 15,156,359 km (0.09 R)
• M40: 15,199,892 km (0.049 R)
• M41: 15,331,089 km (0.095 R)
• M42: 16,081,472 km (0.119 R)
• M43: 16,215,212 km (0.117 R)
• M44: 16,528,470 km (0.107 R)
• M45: 16,708,437 km (0.07 R)
• M46: 17,070,164 km (0.12 R)
• M47: 17,755,472 km (0.092 R)
• M48: 18,032,228 km (0.078 R)
• M49: 18,171,055 km (0.11 R)
• M50: 20,248,221 km (0.071 R)
• M51: 20,924,703 km (0.093 R)
• M52: 23,703,932 km (0.106 R)
• M53: 24,314,292 km (0.052 R)
• M54: 25,187,943 km (0.113 R)
• M55: 25,602,628 km (0.106 R)
• M56: 26,228,995 km (0.079 R)
• M57: 26,333,713 km (0.028 R)
• M58: 27,656,308 km (0.104 R)
• M59: 28,514,102 km (0.068 R)
• M60: 29,816,950 km (0.083 R)
• M61: 29,926,456 km (0.033 R)
• M62: 31,695,750 km (0.087 R)
• M63: 32,255,545 km (0.064 R)
• M64: 33,044,823 km (0.048 R)
• M65: 33,954,528 km (0.043 R)
• M66: 35,045,545 km (0.109 R)
• M67: 35,798,770 km (0.093 R)
• M68: 36,557,082 km (0.117 R)
• M69: 37,144,104 km (0.118 R)
• M70: 37,497,753 km (0.065 R)
• M71: 38,030,471 km (0.099 R)
• M72: 39,463,021 km (0.078 R)
• M73: 39,884,139 km (0.088 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 292 - 15,751 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit