🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.28 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.55 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 173

Radius: 8.2

Gravity: 2.57 G

Time & Orbit

Eccentricity (e): 0.11

Orbit Range: 0.49 AU - 0.61 AU

Year: 282 Days

Day: 6.4 Hours

Environment

Temp: -142 °C

Axial Tilt: 36.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (31)

Outer Limit: 65,451,368 km

• M1: 102,175 km (0.039 R)
• M2: 156,330 km (0.112 R)
• M3: 211,531 km (0.109 R)
• M4: 287,976 km (0.094 R)
• M5: 356,492 km (0.038 R)
• M6: 415,732 km (0.078 R)
• M7: 489,484 km (0.099 R)
• M8: 570,566 km (0.027 R)
• M9: 644,767 km (0.1 R)
• M10: 700,268 km (0.08 R)
• M11: 800,947 km (0.104 R)
• M12: 874,549 km (0.074 R)
• M13: 956,080 km (0.116 R)
• M14: 1,060,200 km (0.113 R)
• M15: 1,183,170 km (0.117 R)
• M16: 1,234,332 km (0.059 R)
• M17: 1,310,926 km (0.118 R)
• M18: 1,427,463 km (0.104 R)
• M19: 1,567,337 km (0.104 R)
• M20: 1,633,908 km (0.12 R)
• M21: 1,732,194 km (0.1 R)
• M22: 1,899,295 km (0.052 R)
• M23: 1,988,455 km (0.054 R)
• M24: 2,119,353 km (0.092 R)
• M25: 2,171,114 km (0.041 R)
• M26: 2,272,092 km (0.116 R)
• M27: 2,386,086 km (0.119 R)
• M28: 2,490,356 km (0.1 R)
• M29: 2,572,485 km (0.109 R)
• M30: 2,627,687 km (0.034 R)
• M31: 2,759,632 km (0.109 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 39.7

Radius: 12.9

Gravity: 0.24 G

Time & Orbit

Eccentricity (e): 0.15

Orbit Range: 0.51 AU - 0.69 AU

Year: 321 Days

Day: 10.6 Hours

Environment

Temp: -157 °C

Axial Tilt: 135.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 65,451,368 km

• M1: 160,668 km (0.077 R)
• M2: 285,732 km (0.095 R)
• M3: 387,458 km (0.103 R)
• M4: 480,658 km (0.086 R)
• M5: 566,378 km (0.102 R)
• M6: 650,003 km (0.078 R)
• M7: 796,908 km (0.113 R)
• M8: 885,769 km (0.089 R)
• M9: 992,283 km (0.103 R)
• M10: 1,093,261 km (0.113 R)
• M11: 1,306,139 km (0.064 R)
• M12: 1,666,520 km (0.115 R)
• M13: 1,793,828 km (0.055 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 242.6

Radius: 8.4

Gravity: 3.44 G

Time & Orbit

Eccentricity (e): 0.243

Orbit Range: 0.55 AU - 0.89 AU

Year: 422 Days

Day: 12.5 Hours

Environment

Temp: -169 °C

Axial Tilt: 48 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 65,451,368 km

• M1: 109,655 km (0.087 R)
• M2: 303,085 km (0.041 R)
• M3: 449,242 km (0.069 R)
• M4: 581,188 km (0.052 R)
• M5: 723,306 km (0.097 R)
• M6: 822,489 km (0.113 R)
• M7: 915,838 km (0.078 R)
• M8: 1,068,428 km (0.119 R)
• M9: 1,249,292 km (0.11 R)
• M10: 1,317,209 km (0.093 R)
• M11: 1,423,573 km (0.047 R)
• M12: 1,498,971 km (0.092 R)
• M13: 1,597,256 km (0.091 R)
• M14: 1,658,292 km (0.088 R)
• M15: 1,719,927 km (0.065 R)
• M16: 1,868,627 km (0.107 R)
• M17: 2,012,241 km (0.042 R)
• M18: 2,078,214 km (0.115 R)
• M19: 2,232,000 km (0.118 R)
• M20: 2,349,883 km (0.11 R)
• M21: 2,419,446 km (0.113 R)
• M22: 2,484,821 km (0.108 R)
• M23: 2,581,461 km (0.046 R)
• M24: 2,684,534 km (0.039 R)
• M25: 2,862,854 km (0.098 R)
• M26: 2,985,824 km (0.118 R)
• M27: 3,099,518 km (0.119 R)
• M28: 3,410,083 km (0.11 R)
• M29: 3,483,536 km (0.076 R)
• M30: 3,586,160 km (0.095 R)
• M31: 3,655,274 km (0.111 R)
• M32: 3,812,203 km (0.102 R)
• M33: 3,888,497 km (0.054 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 655

Radius: 11.2

Gravity: 5.22 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 0.71 AU - 0.8 AU

Year: 448 Days

Day: 13.2 Hours

Environment

Temp: -152 °C

Axial Tilt: 34.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (43)

Outer Limit: 65,451,368 km

• M1: 156,928 km (0.066 R)
• M2: 233,522 km (0.092 R)
• M3: 326,123 km (0.108 R)
• M4: 415,284 km (0.094 R)
• M5: 504,893 km (0.113 R)
• M6: 632,799 km (0.072 R)
• M7: 711,487 km (0.095 R)
• M8: 823,686 km (0.093 R)
• M9: 906,413 km (0.101 R)
• M10: 992,432 km (0.055 R)
• M11: 1,139,038 km (0.045 R)
• M12: 1,298,210 km (0.04 R)
• M13: 1,545,944 km (0.12 R)
• M14: 1,656,048 km (0.106 R)
• M15: 1,786,199 km (0.07 R)
• M16: 1,967,062 km (0.063 R)
• M17: 2,044,704 km (0.093 R)
• M18: 2,117,408 km (0.112 R)
• M19: 2,265,361 km (0.078 R)
• M20: 2,359,607 km (0.093 R)
• M21: 2,429,619 km (0.11 R)
• M22: 2,519,827 km (0.108 R)
• M23: 2,670,472 km (0.051 R)
• M24: 2,878,263 km (0.097 R)
• M25: 2,953,212 km (0.075 R)
• M26: 3,042,821 km (0.111 R)
• M27: 3,147,240 km (0.116 R)
• M28: 3,238,794 km (0.11 R)
• M29: 3,331,245 km (0.104 R)
• M30: 3,467,978 km (0.087 R)
• M31: 3,570,004 km (0.087 R)
• M32: 3,836,886 km (0.056 R)
• M33: 3,934,873 km (0.052 R)
• M34: 4,056,645 km (0.098 R)
• M35: 4,327,418 km (0.116 R)
• M36: 4,429,593 km (0.086 R)
• M37: 4,588,167 km (0.095 R)
• M38: 4,837,995 km (0.109 R)
• M39: 4,960,516 km (0.06 R)
• M40: 5,042,645 km (0.064 R)
• M41: 5,283,797 km (0.085 R)
• M42: 5,384,626 km (0.105 R)
• M43: 5,889,967 km (0.102 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 613.8

Radius: 13

Gravity: 3.63 G

Time & Orbit

Eccentricity (e): 0.19

Orbit Range: 0.88 AU - 1.3 AU

Year: 786 Days

Day: 14.2 Hours

Environment

Temp: -180 °C

Axial Tilt: 26.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (48)

Outer Limit: 65,451,368 km

• M1: 163,810 km (0.097 R)
• M2: 251,923 km (0.109 R)
• M3: 364,121 km (0.077 R)
• M4: 542,442 km (0.104 R)
• M5: 688,749 km (0.055 R)
• M6: 866,620 km (0.052 R)
• M7: 967,449 km (0.114 R)
• M8: 1,048,980 km (0.078 R)
• M9: 1,295,817 km (0.091 R)
• M10: 1,514,230 km (0.043 R)
• M11: 1,596,658 km (0.056 R)
• M12: 1,687,913 km (0.087 R)
• M13: 1,831,826 km (0.071 R)
• M14: 2,178,893 km (0.043 R)
• M15: 2,320,413 km (0.085 R)
• M16: 2,481,529 km (0.051 R)
• M17: 2,563,509 km (0.118 R)
• M18: 2,781,024 km (0.096 R)
• M19: 2,900,703 km (0.086 R)
• M20: 2,987,320 km (0.073 R)
• M21: 3,074,685 km (0.09 R)
• M22: 3,198,702 km (0.118 R)
• M23: 3,315,388 km (0.117 R)
• M24: 3,525,274 km (0.095 R)
• M25: 3,786,771 km (0.112 R)
• M26: 4,064,425 km (0.114 R)
• M27: 4,200,858 km (0.05 R)
• M28: 4,589,214 km (0.115 R)
• M29: 4,875,245 km (0.077 R)
• M30: 5,325,983 km (0.11 R)
• M31: 5,443,418 km (0.083 R)
• M32: 5,615,904 km (0.102 R)
• M33: 5,735,582 km (0.091 R)
• M34: 5,823,097 km (0.062 R)
• M35: 5,966,412 km (0.077 R)
• M36: 6,099,554 km (0.116 R)
• M37: 6,585,298 km (0.107 R)
• M38: 6,850,386 km (0.109 R)
• M39: 6,966,623 km (0.114 R)
• M40: 7,083,609 km (0.112 R)
• M41: 7,236,797 km (0.093 R)
• M42: 7,331,492 km (0.118 R)
• M43: 7,570,251 km (0.098 R)
• M44: 7,823,669 km (0.09 R)
• M45: 7,908,791 km (0.07 R)
• M46: 8,092,198 km (0.107 R)
• M47: 8,190,633 km (0.119 R)
• M48: 8,277,101 km (0.1 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.47 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 798.4

Radius: 11

Gravity: 6.6 G

Time & Orbit

Eccentricity (e): 0.068

Orbit Range: 1.37 AU - 1.57 AU

Year: 1230 Days

Day: 6.7 Hours

Environment

Temp: -194 °C

Axial Tilt: 10 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (61)

Outer Limit: 65,451,368 km

• M1: 137,181 km (0.084 R)
• M2: 207,492 km (0.037 R)
• M3: 309,219 km (0.076 R)
• M4: 395,387 km (0.081 R)
• M5: 550,670 km (0.113 R)
• M6: 708,645 km (0.075 R)
• M7: 832,363 km (0.117 R)
• M8: 919,279 km (0.112 R)
• M9: 1,001,857 km (0.111 R)
• M10: 1,158,935 km (0.074 R)
• M11: 1,257,221 km (0.101 R)
• M12: 1,489,247 km (0.093 R)
• M13: 1,660,985 km (0.105 R)
• M14: 1,839,455 km (0.093 R)
• M15: 2,014,485 km (0.118 R)
• M16: 2,104,094 km (0.119 R)
• M17: 2,297,823 km (0.116 R)
• M18: 2,465,672 km (0.025 R)
• M19: 2,791,347 km (0.119 R)
• M20: 3,050,450 km (0.066 R)
• M21: 3,412,327 km (0.106 R)
• M22: 3,640,913 km (0.058 R)
• M23: 3,775,551 km (0.119 R)
• M24: 3,862,168 km (0.046 R)
• M25: 4,164,057 km (0.103 R)
• M26: 4,447,694 km (0.11 R)
• M27: 4,591,907 km (0.093 R)
• M28: 4,737,615 km (0.068 R)
• M29: 4,898,433 km (0.091 R)
• M30: 5,020,355 km (0.077 R)
• M31: 5,336,156 km (0.109 R)
• M32: 5,559,805 km (0.116 R)
• M33: 5,672,751 km (0.064 R)
• M34: 5,944,122 km (0.111 R)
• M35: 6,016,378 km (0.107 R)
• M36: 6,146,977 km (0.069 R)
• M37: 6,337,265 km (0.115 R)
• M38: 6,499,878 km (0.116 R)
• M39: 6,783,964 km (0.057 R)
• M40: 6,980,685 km (0.029 R)
• M41: 7,333,437 km (0.112 R)
• M42: 7,488,720 km (0.113 R)
• M43: 7,897,272 km (0.079 R)
• M44: 7,976,708 km (0.054 R)
• M45: 8,104,465 km (0.094 R)
• M46: 8,410,392 km (0.09 R)
• M47: 8,752,822 km (0.078 R)
• M48: 8,950,740 km (0.074 R)
• M49: 9,033,617 km (0.104 R)
• M50: 9,116,644 km (0.097 R)
• M51: 9,300,500 km (0.059 R)
• M52: 9,756,773 km (0.103 R)
• M53: 9,876,302 km (0.088 R)
• M54: 10,656,156 km (0.056 R)
• M55: 10,902,842 km (0.057 R)
• M56: 11,080,116 km (0.113 R)
• M57: 11,581,867 km (0.109 R)
• M58: 11,963,043 km (0.09 R)
• M59: 12,237,854 km (0.065 R)
• M60: 12,311,456 km (0.105 R)
• M61: 12,403,758 km (0.067 R)

Planet 7 - Ice Giant

Semi-Major Axis: 6.23 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 286.8

Radius: 3.1

Gravity: 29.84 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 5.99 AU - 6.47 AU

Year: 10734 Days

Day: 23.4 Hours

Environment

Temp: -236 °C

Axial Tilt: 1.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 65,451,368 km

• M1: 48,021 km (0.096 R)
• M2: 76,145 km (0.091 R)
• M3: 161,117 km (0.054 R)
• M4: 223,948 km (0.08 R)
• M5: 734,077 km (0.061 R)
• M6: 1,465,012 km (0.111 R)
• M7: 1,619,098 km (0.102 R)
• M8: 1,698,235 km (0.116 R)
• M9: 2,112,023 km (0.117 R)
• M10: 2,532,692 km (0.052 R)
• M11: 3,447,932 km (0.103 R)
• M12: 3,678,312 km (0.108 R)
• M13: 3,887,301 km (0.119 R)
• M14: 4,073,251 km (0.109 R)
• M15: 4,207,889 km (0.117 R)
• M16: 4,453,828 km (0.118 R)
• M17: 4,509,179 km (0.116 R)
• M18: 4,592,505 km (0.117 R)
• M19: 4,874,198 km (0.102 R)
• M20: 5,045,936 km (0.111 R)
• M21: 5,103,531 km (0.088 R)
• M22: 5,842,694 km (0.072 R)
• M23: 6,147,575 km (0.075 R)
• M24: 6,209,209 km (0.077 R)
• M25: 6,270,993 km (0.091 R)
• M26: 6,332,927 km (0.082 R)
• M27: 6,364,043 km (0.104 R)
• M28: 6,646,035 km (0.111 R)
• M29: 6,996,393 km (0.116 R)
• M30: 7,417,960 km (0.062 R)
• M31: 7,516,395 km (0.064 R)
• M32: 7,615,280 km (0.087 R)
• M33: 7,714,613 km (0.08 R)
• M34: 8,319,586 km (0.038 R)
• M35: 9,009,532 km (0.112 R)
• M36: 9,079,544 km (0.049 R)
• M37: 9,361,236 km (0.11 R)
• M38: 9,717,578 km (0.115 R)
• M39: 9,789,236 km (0.1 R)
• M40: 10,078,259 km (0.115 R)
• M41: 10,114,462 km (0.074 R)
• M42: 10,260,170 km (0.067 R)
• M43: 10,886,985 km (0.057 R)
• M44: 11,073,683 km (0.061 R)
• M45: 12,138,820 km (0.08 R)
• M46: 12,683,356 km (0.088 R)
• M47: 12,761,895 km (0.069 R)
• M48: 14,446,367 km (0.085 R)
• M49: 15,147,682 km (0.056 R)
• M50: 16,284,327 km (0.081 R)
• M51: 16,412,233 km (0.063 R)
• M52: 17,100,383 km (0.119 R)
• M53: 17,535,264 km (0.103 R)
• M54: 18,106,129 km (0.111 R)
• M55: 18,816,869 km (0.083 R)
• M56: 19,718,196 km (0.063 R)
• M57: 19,854,480 km (0.11 R)
• M58: 20,219,798 km (0.111 R)
• M59: 20,541,284 km (0.057 R)
• M60: 22,220,819 km (0.064 R)
• M61: 23,364,644 km (0.061 R)
• M62: 23,701,987 km (0.041 R)
• M63: 23,895,417 km (0.113 R)
• M64: 24,235,154 km (0.061 R)
• M65: 25,116,136 km (0.114 R)
• M66: 26,357,050 km (0.11 R)
• M67: 26,758,422 km (0.072 R)
• M68: 26,959,780 km (0.084 R)
• M69: 27,010,195 km (0.105 R)
• M70: 27,516,284 km (0.077 R)
• M71: 27,923,340 km (0.075 R)
• M72: 28,229,866 km (0.105 R)
• M73: 29,001,342 km (0.103 R)
• M74: 29,467,489 km (0.084 R)
• M75: 30,302,395 km (0.038 R)
• M76: 30,354,754 km (0.103 R)
• M77: 30,722,616 km (0.065 R)
• M78: 31,197,888 km (0.104 R)
• M79: 31,622,297 km (0.09 R)
• M80: 32,262,426 km (0.075 R)
• M81: 32,530,506 km (0.114 R)
• M82: 33,338,933 km (0.069 R)
• M83: 33,664,158 km (0.087 R)
• M84: 33,718,462 km (0.084 R)
• M85: 33,881,524 km (0.106 R)
• M86: 34,044,885 km (0.105 R)
• M87: 34,865,579 km (0.068 R)
• M88: 34,920,631 km (0.104 R)
• M89: 35,416,398 km (0.08 R)
• M90: 35,471,600 km (0.109 R)

Planet 8 - Ice Giant

Semi-Major Axis: 8.43 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 611

Radius: 3.7

Gravity: 44.63 G

Time & Orbit

Eccentricity (e): 0.127

Orbit Range: 7.36 AU - 9.5 AU

Year: 16895 Days

Day: 20.5 Hours

Environment

Temp: -237 °C

Axial Tilt: 12.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 65,451,368 km

• M1: 154,385 km (0.097 R)
• M2: 403,017 km (0.119 R)
• M3: 438,172 km (0.049 R)
• M4: 474,225 km (0.098 R)
• M5: 549,772 km (0.09 R)
• M6: 1,155,045 km (0.104 R)
• M7: 1,180,327 km (0.114 R)
• M8: 1,443,470 km (0.115 R)
• M9: 1,782,608 km (0.111 R)
• M10: 1,871,170 km (0.037 R)
• M11: 1,931,009 km (0.045 R)
• M12: 2,145,383 km (0.117 R)
• M13: 2,208,065 km (0.095 R)
• M14: 2,663,590 km (0.101 R)
• M15: 2,730,909 km (0.105 R)
• M16: 3,508,968 km (0.118 R)
• M17: 3,960,304 km (0.118 R)
• M18: 4,153,734 km (0.072 R)
• M19: 4,231,974 km (0.113 R)
• M20: 5,124,325 km (0.087 R)
• M21: 6,250,498 km (0.109 R)
• M22: 7,880,666 km (0.099 R)
• M23: 8,717,068 km (0.038 R)
• M24: 9,788,637 km (0.094 R)
• M25: 9,840,548 km (0.113 R)
• M26: 10,207,512 km (0.111 R)
• M27: 10,313,277 km (0.077 R)
• M28: 10,900,898 km (0.052 R)
• M29: 11,996,852 km (0.074 R)
• M30: 12,671,089 km (0.111 R)
• M31: 12,898,478 km (0.116 R)
• M32: 13,070,067 km (0.096 R)
• M33: 13,589,022 km (0.099 R)
• M34: 14,114,709 km (0.106 R)
• M35: 15,367,142 km (0.106 R)
• M36: 15,548,903 km (0.091 R)
• M37: 16,903,662 km (0.085 R)
• M38: 18,424,025 km (0.087 R)
• M39: 19,331,037 km (0.103 R)
• M40: 20,053,744 km (0.034 R)
• M41: 20,119,866 km (0.056 R)
• M42: 21,120,676 km (0.061 R)
• M43: 21,932,843 km (0.058 R)
• M44: 22,824,297 km (0.086 R)
• M45: 23,378,706 km (0.117 R)
• M46: 23,937,604 km (0.115 R)
• M47: 24,007,765 km (0.111 R)
• M48: 24,077,927 km (0.086 R)
• M49: 24,500,840 km (0.056 R)
• M50: 27,162,037 km (0.109 R)
• M51: 28,118,565 km (0.092 R)
• M52: 28,192,616 km (0.107 R)
• M53: 28,340,868 km (0.098 R)
• M54: 28,489,418 km (0.102 R)
• M55: 29,461,057 km (0.068 R)
• M56: 32,285,614 km (0.032 R)
• M57: 32,440,747 km (0.068 R)
• M58: 33,533,560 km (0.081 R)
• M59: 37,289,364 km (0.038 R)
• M60: 38,023,590 km (0.081 R)
• M61: 38,845,032 km (0.114 R)
• M62: 39,092,616 km (0.073 R)
• M63: 39,257,922 km (0.11 R)
• M64: 39,755,335 km (0.039 R)
• M65: 40,338,168 km (0.101 R)
• M66: 40,840,069 km (0.112 R)
• M67: 41,007,918 km (0.091 R)
• M68: 41,175,916 km (0.046 R)
• M69: 42,443,160 km (0.072 R)
• M70: 43,808,839 km (0.075 R)
• M71: 44,929,028 km (0.099 R)
• M72: 45,884,360 km (0.105 R)
• M73: 46,146,006 km (0.111 R)
• M74: 46,408,251 km (0.103 R)
• M75: 47,285,643 km (0.082 R)
• M76: 47,461,869 km (0.108 R)
• M77: 49,146,192 km (0.08 R)
• M78: 49,771,660 km (0.111 R)
• M79: 50,130,246 km (0.11 R)
• M80: 50,579,788 km (0.094 R)
• M81: 51,301,598 km (0.077 R)
• M82: 52,482,075 km (0.118 R)
• M83: 53,855,084 km (0.095 R)
• M84: 54,499,851 km (0.091 R)
• M85: 54,684,454 km (0.104 R)
• M86: 57,385,893 km (0.085 R)
• M87: 58,610,800 km (0.063 R)
• M88: 58,894,737 km (0.09 R)
• M89: 58,989,432 km (0.101 R)
• M90: 60,703,525 km (0.093 R)
• M91: 60,894,860 km (0.083 R)
• M92: 61,855,129 km (0.049 R)
• M93: 63,985,253 km (0.061 R)
• M94: 64,472,793 km (0.091 R)

Kuiper Belt

Range: 30 - 50 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 183 - 12,754 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit