🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.62 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.4

Radius: 0.69

Gravity: 0.84 G

Time & Orbit

Eccentricity (e): 0.069

Orbit Range: 0.58 AU - 0.66 AU

Year: 315 Days

Day: 23.2 Hours

Environment

Temp: -121 °C

Axial Tilt: 43.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 0.99 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 2 - Gas Giant

Semi-Major Axis: 1.35 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 100.3

Radius: 10.5

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 1.11 AU - 1.59 AU

Year: 1013 Days

Day: 14.4 Hours

Environment

Temp: -174 °C

Axial Tilt: 15.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 68,763,448 km

• M1: 133,142 km (0.097 R)
• M2: 217,366 km (0.036 R)
• M3: 326,123 km (0.08 R)
• M4: 414,237 km (0.109 R)
• M5: 560,394 km (0.071 R)
• M6: 653,593 km (0.083 R)
• M7: 752,776 km (0.06 R)
• M8: 865,723 km (0.119 R)
• M9: 980,464 km (0.025 R)
• M10: 1,073,514 km (0.106 R)
• M11: 1,202,318 km (0.054 R)
• M12: 1,297,762 km (0.113 R)
• M13: 1,511,686 km (0.108 R)
• M14: 1,604,886 km (0.116 R)
• M15: 1,726,659 km (0.038 R)
• M16: 1,829,732 km (0.101 R)
• M17: 1,957,339 km (0.116 R)
• M18: 2,053,680 km (0.055 R)
• M19: 2,209,860 km (0.053 R)
• M20: 2,559,021 km (0.071 R)
• M21: 2,696,202 km (0.096 R)
• M22: 2,810,196 km (0.117 R)
• M23: 2,951,716 km (0.086 R)
• M24: 3,062,867 km (0.039 R)
• M25: 3,148,736 km (0.113 R)
• M26: 3,336,481 km (0.096 R)
• M27: 3,534,848 km (0.048 R)
• M28: 3,611,143 km (0.091 R)
• M29: 3,681,005 km (0.091 R)
• M30: 3,800,833 km (0.12 R)
• M31: 3,900,465 km (0.096 R)
• M32: 4,058,740 km (0.068 R)
• M33: 4,167,946 km (0.062 R)
• M34: 4,248,729 km (0.105 R)
• M35: 4,315,151 km (0.101 R)
• M36: 4,501,550 km (0.099 R)
• M37: 4,744,048 km (0.117 R)
• M38: 4,813,012 km (0.053 R)
• M39: 5,022,150 km (0.068 R)
• M40: 5,242,059 km (0.11 R)
• M41: 5,345,282 km (0.091 R)
• M42: 5,441,174 km (0.055 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.53 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 173.4

Radius: 11.8

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.039

Orbit Range: 1.47 AU - 1.59 AU

Year: 1222 Days

Day: 5.3 Hours

Environment

Temp: -177 °C

Axial Tilt: 31.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 68,763,448 km

• M1: 155,133 km (0.065 R)
• M2: 254,316 km (0.119 R)
• M3: 331,359 km (0.09 R)
• M4: 413,788 km (0.074 R)
• M5: 542,591 km (0.099 R)
• M6: 705,803 km (0.094 R)
• M7: 861,235 km (0.072 R)
• M8: 1,007,392 km (0.082 R)
• M9: 1,094,907 km (0.057 R)
• M10: 1,202,318 km (0.12 R)
• M11: 1,283,999 km (0.111 R)
• M12: 1,410,110 km (0.093 R)
• M13: 1,509,143 km (0.103 R)
• M14: 1,630,018 km (0.103 R)
• M15: 1,834,369 km (0.025 R)
• M16: 1,943,276 km (0.029 R)
• M17: 2,153,312 km (0.108 R)
• M18: 2,261,321 km (0.056 R)
• M19: 2,430,367 km (0.11 R)
• M20: 2,543,014 km (0.109 R)
• M21: 2,619,160 km (0.115 R)
• M22: 3,043,269 km (0.072 R)
• M23: 3,181,498 km (0.092 R)
• M24: 3,346,654 km (0.095 R)
• M25: 3,472,466 km (0.116 R)
• M26: 3,625,504 km (0.069 R)
• M27: 3,763,583 km (0.062 R)
• M28: 3,894,481 km (0.09 R)
• M29: 4,278,499 km (0.107 R)
• M30: 4,424,507 km (0.098 R)
• M31: 4,516,659 km (0.086 R)
• M32: 4,590,859 km (0.091 R)
• M33: 4,731,033 km (0.114 R)
• M34: 4,834,704 km (0.055 R)
• M35: 4,948,698 km (0.076 R)
• M36: 5,034,866 km (0.072 R)
• M37: 5,364,729 km (0.115 R)
• M38: 5,443,418 km (0.118 R)
• M39: 5,661,681 km (0.077 R)
• M40: 5,792,130 km (0.096 R)
• M41: 5,923,477 km (0.058 R)
• M42: 6,056,021 km (0.067 R)
• M43: 6,220,279 km (0.082 R)
• M44: 6,386,184 km (0.098 R)
• M45: 6,701,087 km (0.068 R)
• M46: 6,881,801 km (0.106 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.46 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 709.7

Radius: 14.4

Gravity: 3.42 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 4.31 AU - 4.61 AU

Year: 6082 Days

Day: 7.2 Hours

Environment

Temp: -210 °C

Axial Tilt: 48.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 68,763,448 km

• M1: 213,775 km (0.12 R)
• M2: 332,706 km (0.08 R)
• M3: 425,606 km (0.108 R)
• M4: 554,709 km (0.03 R)
• M5: 675,434 km (0.061 R)
• M6: 779,704 km (0.118 R)
• M7: 904,768 km (0.109 R)
• M8: 1,098,796 km (0.106 R)
• M9: 1,425,518 km (0.106 R)
• M10: 1,655,001 km (0.045 R)
• M11: 1,859,053 km (0.092 R)
• M12: 2,131,171 km (0.058 R)
• M13: 2,231,701 km (0.08 R)
• M14: 3,047,608 km (0.119 R)
• M15: 3,300,279 km (0.044 R)
• M16: 3,393,927 km (0.05 R)
• M17: 3,753,261 km (0.108 R)
• M18: 4,405,208 km (0.075 R)
• M19: 4,770,975 km (0.086 R)
• M20: 4,984,601 km (0.075 R)
• M21: 5,201,368 km (0.092 R)
• M22: 5,393,602 km (0.093 R)
• M23: 5,644,328 km (0.087 R)
• M24: 5,813,672 km (0.03 R)
• M25: 5,956,090 km (0.045 R)
• M26: 6,449,015 km (0.11 R)
• M27: 6,774,988 km (0.106 R)
• M28: 7,911,334 km (0.117 R)
• M29: 8,810,417 km (0.098 R)
• M30: 8,941,465 km (0.095 R)
• M31: 9,338,797 km (0.091 R)
• M32: 9,674,195 km (0.091 R)
• M33: 9,945,566 km (0.11 R)
• M34: 10,426,373 km (0.066 R)
• M35: 10,774,487 km (0.086 R)
• M36: 11,091,037 km (0.065 R)
• M37: 11,197,401 km (0.076 R)
• M38: 12,278,245 km (0.071 R)
• M39: 12,794,059 km (0.115 R)
• M40: 13,467,848 km (0.096 R)
• M41: 14,384,134 km (0.065 R)
• M42: 14,616,310 km (0.101 R)
• M43: 14,888,878 km (0.092 R)
• M44: 15,045,357 km (0.108 R)
• M45: 17,293,215 km (0.111 R)
• M46: 17,829,822 km (0.099 R)
• M47: 18,037,763 km (0.103 R)
• M48: 18,246,452 km (0.072 R)
• M49: 18,750,747 km (0.099 R)
• M50: 19,046,950 km (0.118 R)
• M51: 19,259,529 km (0.107 R)
• M52: 19,387,435 km (0.066 R)
• M53: 19,772,799 km (0.091 R)
• M54: 21,075,946 km (0.113 R)
• M55: 21,339,837 km (0.036 R)
• M56: 21,737,917 km (0.115 R)
• M57: 22,766,103 km (0.045 R)
• M58: 23,582,010 km (0.081 R)
• M59: 25,242,247 km (0.115 R)
• M60: 26,086,577 km (0.096 R)
• M61: 26,512,183 km (0.048 R)
• M62: 26,654,451 km (0.116 R)
• M63: 27,274,385 km (0.119 R)
• M64: 27,562,211 km (0.038 R)
• M65: 28,918,316 km (0.093 R)
• M66: 29,064,922 km (0.068 R)
• M67: 29,260,745 km (0.092 R)
• M68: 30,196,929 km (0.073 R)
• M69: 30,345,629 km (0.096 R)
• M70: 30,793,226 km (0.109 R)
• M71: 32,199,894 km (0.119 R)
• M72: 34,039,200 km (0.061 R)
• M73: 34,452,539 km (0.093 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 431.8

Radius: 13.7

Gravity: 2.3 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 4.79 AU - 5.51 AU

Year: 7546 Days

Day: 7.2 Hours

Environment

Temp: -225 °C

Axial Tilt: 71.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 68,763,448 km

• M1: 171,439 km (0.094 R)
• M2: 280,945 km (0.071 R)
• M3: 549,323 km (0.085 R)
• M4: 656,136 km (0.11 R)
• M5: 798,105 km (0.108 R)
• M6: 1,085,482 km (0.085 R)
• M7: 1,258,417 km (0.116 R)
• M8: 1,632,562 km (0.115 R)
• M9: 1,964,968 km (0.095 R)
• M10: 2,218,836 km (0.112 R)
• M11: 3,362,661 km (0.084 R)
• M12: 3,478,898 km (0.025 R)
• M13: 4,007,129 km (0.063 R)
• M14: 4,331,307 km (0.073 R)
• M15: 4,432,735 km (0.105 R)
• M16: 4,560,641 km (0.095 R)
• M17: 4,664,013 km (0.116 R)
• M18: 4,794,313 km (0.058 R)
• M19: 5,165,465 km (0.071 R)
• M20: 6,248,553 km (0.078 R)
• M21: 6,479,383 km (0.118 R)
• M22: 6,654,412 km (0.084 R)
• M23: 6,771,996 km (0.096 R)
• M24: 6,979,339 km (0.044 R)
• M25: 7,249,064 km (0.037 R)
• M26: 7,491,712 km (0.052 R)
• M27: 7,798,836 km (0.095 R)
• M28: 7,985,235 km (0.105 R)
• M29: 8,204,396 km (0.119 R)
• M30: 8,330,657 km (0.084 R)
• M31: 8,971,384 km (0.107 R)
• M32: 9,101,385 km (0.1 R)
• M33: 9,661,180 km (0.067 R)
• M34: 10,063,150 km (0.029 R)
• M35: 10,232,195 km (0.11 R)
• M36: 11,091,934 km (0.114 R)
• M37: 11,796,390 km (0.117 R)
• M38: 11,974,861 km (0.048 R)
• M39: 12,551,710 km (0.066 R)
• M40: 12,880,227 km (0.049 R)
• M41: 12,990,481 km (0.108 R)
• M42: 13,211,736 km (0.114 R)
• M43: 13,958,229 km (0.034 R)
• M44: 15,258,684 km (0.064 R)
• M45: 15,962,841 km (0.069 R)
• M46: 17,524,643 km (0.094 R)
• M47: 18,468,605 km (0.081 R)
• M48: 18,717,536 km (0.054 R)
• M49: 19,344,800 km (0.077 R)
• M50: 19,513,247 km (0.097 R)
• M51: 20,234,608 km (0.057 R)
• M52: 20,362,813 km (0.117 R)
• M53: 20,878,328 km (0.093 R)
• M54: 21,224,348 km (0.095 R)
• M55: 21,659,677 km (0.06 R)
• M56: 22,849,728 km (0.098 R)
• M57: 23,699,743 km (0.113 R)
• M58: 26,685,867 km (0.115 R)
• M59: 26,920,436 km (0.056 R)
• M60: 27,628,184 km (0.118 R)
• M61: 28,485,828 km (0.098 R)
• M62: 28,725,484 km (0.088 R)
• M63: 29,062,378 km (0.087 R)
• M64: 29,303,680 km (0.05 R)
• M65: 29,934,384 km (0.057 R)
• M66: 30,226,998 km (0.051 R)
• M67: 31,258,625 km (0.037 R)
• M68: 32,251,805 km (0.093 R)
• M69: 32,401,552 km (0.104 R)
• M70: 32,702,095 km (0.052 R)
• M71: 32,953,120 km (0.089 R)
• M72: 33,053,799 km (0.057 R)
• M73: 33,305,722 km (0.112 R)
• M74: 33,406,701 km (0.077 R)
• M75: 33,659,521 km (0.065 R)
• M76: 34,014,666 km (0.101 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.48 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 662.6

Radius: 8.4

Gravity: 9.39 G

Time & Orbit

Eccentricity (e): 0.075

Orbit Range: 5.07 AU - 5.89 AU

Year: 8283 Days

Day: 11.4 Hours

Environment

Temp: -209 °C

Axial Tilt: 21.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 68,763,448 km

• M1: 365,916 km (0.056 R)
• M2: 463,454 km (0.05 R)
• M3: 613,351 km (0.087 R)
• M4: 763,996 km (0.025 R)
• M5: 978,220 km (0.058 R)
• M6: 1,119,740 km (0.102 R)
• M7: 1,403,527 km (0.099 R)
• M8: 1,463,067 km (0.097 R)
• M9: 1,584,690 km (0.027 R)
• M10: 1,816,567 km (0.082 R)
• M11: 2,527,306 km (0.12 R)
• M12: 2,798,677 km (0.091 R)
• M13: 3,053,592 km (0.062 R)
• M14: 3,396,171 km (0.054 R)
• M15: 3,751,017 km (0.097 R)
• M16: 4,233,171 km (0.039 R)
• M17: 4,764,842 km (0.075 R)
• M18: 4,977,420 km (0.048 R)
• M19: 5,286,340 km (0.099 R)
• M20: 5,601,692 km (0.089 R)
• M21: 5,890,715 km (0.079 R)
• M22: 6,086,090 km (0.115 R)
• M23: 6,184,526 km (0.099 R)
• M24: 6,250,498 km (0.107 R)
• M25: 6,416,552 km (0.112 R)
• M26: 6,718,889 km (0.083 R)
• M27: 7,060,421 km (0.066 R)
• M28: 7,233,207 km (0.099 R)
• M29: 7,547,961 km (0.12 R)
• M30: 7,653,876 km (0.12 R)
• M31: 7,795,994 km (0.108 R)
• M32: 8,372,694 km (0.048 R)
• M33: 9,000,406 km (0.033 R)
• M34: 9,075,355 km (0.079 R)
• M35: 9,452,790 km (0.108 R)
• M36: 10,933,360 km (0.112 R)
• M37: 11,093,430 km (0.063 R)
• M38: 11,213,856 km (0.028 R)
• M39: 11,496,896 km (0.116 R)
• M40: 11,578,127 km (0.085 R)
• M41: 12,820,089 km (0.072 R)
• M42: 13,031,171 km (0.098 R)
• M43: 14,584,895 km (0.118 R)
• M44: 14,805,252 km (0.064 R)
• M45: 15,249,409 km (0.027 R)
• M46: 16,333,096 km (0.107 R)
• M47: 17,255,067 km (0.056 R)
• M48: 17,957,579 km (0.041 R)
• M49: 18,956,743 km (0.111 R)
• M50: 19,584,306 km (0.09 R)
• M51: 19,778,783 km (0.111 R)
• M52: 20,366,105 km (0.095 R)
• M53: 21,507,686 km (0.039 R)
• M54: 21,658,032 km (0.057 R)
• M55: 21,909,506 km (0.096 R)
• M56: 22,060,899 km (0.097 R)
• M57: 22,415,446 km (0.103 R)
• M58: 23,956,154 km (0.056 R)
• M59: 26,116,647 km (0.115 R)
• M60: 26,330,721 km (0.115 R)
• M61: 26,760,666 km (0.102 R)
• M62: 27,247,008 km (0.118 R)
• M63: 28,393,377 km (0.098 R)
• M64: 28,558,533 km (0.064 R)
• M65: 28,834,242 km (0.087 R)
• M66: 29,000,146 km (0.096 R)
• M67: 29,722,853 km (0.099 R)
• M68: 29,890,403 km (0.1 R)
• M69: 30,114,351 km (0.047 R)
• M70: 30,338,897 km (0.095 R)
• M71: 31,242,468 km (0.104 R)
• M72: 31,412,860 km (0.084 R)
• M73: 31,983,127 km (0.107 R)
• M74: 33,714,423 km (0.062 R)
• M75: 34,885,475 km (0.086 R)
• M76: 35,062,300 km (0.093 R)
• M77: 35,950,762 km (0.093 R)
• M78: 36,010,302 km (0.116 R)
• M79: 36,547,209 km (0.105 R)
• M80: 36,607,048 km (0.067 R)
• M81: 36,966,681 km (0.119 R)
• M82: 37,086,808 km (0.108 R)
• M83: 37,810,263 km (0.083 R)
• M84: 38,173,786 km (0.086 R)
• M85: 38,234,523 km (0.088 R)
• M86: 40,132,172 km (0.05 R)
• M87: 40,193,956 km (0.071 R)
• M88: 40,750,759 km (0.11 R)
• M89: 41,061,324 km (0.097 R)

Planet 7 - Ice Giant

Semi-Major Axis: 9.28 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 607

Radius: 7

Gravity: 12.39 G

Time & Orbit

Eccentricity (e): 0.228

Orbit Range: 7.16 AU - 11.4 AU

Year: 18253 Days

Day: 16.5 Hours

Environment

Temp: -219 °C

Axial Tilt: 34.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 68,763,448 km

• M1: 657,183 km (0.076 R)
• M2: 1,046,288 km (0.104 R)
• M3: 1,199,027 km (0.04 R)
• M4: 1,251,536 km (0.079 R)
• M5: 1,386,323 km (0.113 R)
• M6: 1,497,624 km (0.09 R)
• M7: 3,049,553 km (0.093 R)
• M8: 3,531,407 km (0.108 R)
• M9: 3,839,878 km (0.109 R)
• M10: 3,997,255 km (0.099 R)
• M11: 4,523,540 km (0.053 R)
• M12: 4,943,312 km (0.085 R)
• M13: 5,551,727 km (0.099 R)
• M14: 5,910,013 km (0.087 R)
• M15: 6,000,819 km (0.12 R)
• M16: 6,137,701 km (0.041 R)
• M17: 6,322,006 km (0.095 R)
• M18: 6,790,696 km (0.078 R)
• M19: 7,125,496 km (0.075 R)
• M20: 7,367,845 km (0.112 R)
• M21: 7,465,532 km (0.062 R)
• M22: 9,402,675 km (0.118 R)
• M23: 9,455,633 km (0.039 R)
• M24: 9,508,740 km (0.115 R)
• M25: 9,615,254 km (0.069 R)
• M26: 9,829,328 km (0.032 R)
• M27: 10,045,048 km (0.101 R)
• M28: 11,428,230 km (0.078 R)
• M29: 11,541,476 km (0.104 R)
• M30: 11,655,021 km (0.1 R)
• M31: 11,826,160 km (0.117 R)
• M32: 13,582,290 km (0.117 R)
• M33: 14,429,463 km (0.03 R)
• M34: 14,736,138 km (0.092 R)
• M35: 16,749,277 km (0.055 R)
• M36: 16,942,408 km (0.114 R)
• M37: 17,136,286 km (0.085 R)
• M38: 17,201,062 km (0.116 R)
• M39: 19,586,999 km (0.114 R)
• M40: 20,749,225 km (0.111 R)
• M41: 22,498,772 km (0.116 R)
• M42: 22,569,681 km (0.051 R)
• M43: 23,498,983 km (0.119 R)
• M44: 24,440,702 km (0.091 R)
• M45: 25,026,377 km (0.077 R)
• M46: 25,394,687 km (0.042 R)
• M47: 25,690,742 km (0.117 R)
• M48: 25,987,843 km (0.114 R)
• M49: 26,961,426 km (0.077 R)
• M50: 27,339,011 km (0.089 R)
• M51: 27,870,682 km (0.105 R)
• M52: 28,405,644 km (0.046 R)
• M53: 28,867,004 km (0.095 R)
• M54: 31,131,317 km (0.063 R)
• M55: 31,765,911 km (0.091 R)
• M56: 31,845,497 km (0.073 R)
• M57: 32,084,854 km (0.071 R)
• M58: 33,209,381 km (0.118 R)
• M59: 33,371,096 km (0.084 R)
• M60: 33,695,275 km (0.081 R)
• M61: 34,838,053 km (0.114 R)
• M62: 35,167,019 km (0.049 R)
• M63: 36,076,723 km (0.094 R)
• M64: 37,581,977 km (0.089 R)
• M65: 38,511,877 km (0.097 R)
• M66: 39,192,997 km (0.112 R)
• M67: 40,222,080 km (0.12 R)
• M68: 42,482,055 km (0.11 R)
• M69: 42,745,497 km (0.073 R)
• M70: 43,273,877 km (0.04 R)
• M71: 43,538,964 km (0.036 R)
• M72: 43,627,377 km (0.098 R)
• M73: 43,893,212 km (0.112 R)
• M74: 45,319,628 km (0.085 R)
• M75: 46,038,595 km (0.052 R)
• M76: 48,217,787 km (0.028 R)
• M77: 48,584,302 km (0.083 R)
• M78: 49,043,717 km (0.083 R)
• M79: 51,082,138 km (0.112 R)
• M80: 51,736,479 km (0.115 R)
• M81: 52,111,670 km (0.031 R)
• M82: 52,770,350 km (0.058 R)
• M83: 52,959,142 km (0.114 R)
• M84: 53,148,084 km (0.06 R)
• M85: 53,526,567 km (0.118 R)
• M86: 53,621,412 km (0.088 R)
• M87: 54,286,375 km (0.107 R)
• M88: 56,490,699 km (0.105 R)
• M89: 56,973,751 km (0.102 R)
• M90: 57,846,654 km (0.027 R)
• M91: 58,138,669 km (0.114 R)
• M92: 58,333,446 km (0.099 R)
• M93: 58,919,570 km (0.09 R)
• M94: 61,481,583 km (0.096 R)
• M95: 64,381,837 km (0.106 R)
• M96: 68,660,486 km (0.09 R)

Kuiper Belt

Range: 30 - 49 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 365 - 15,729 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit