🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.57 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.1

Radius: 1.57

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 0.5 AU - 0.64 AU

Year: 164 Days

Day: 13.7 Hours

Environment

Temp: 141 °C

Axial Tilt: 9 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 93,647,139 km

• M1: 212,130 km (0.114 R)

Planet 2 - Terrestrial

Semi-Major Axis: 2.54 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.7

Radius: 1.69

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.014

Orbit Range: 2.5 AU - 2.58 AU

Year: 1542 Days

Day: 26.7 Hours

Environment

Temp: -102 °C

Axial Tilt: 44 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 3.37 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.02

Radius: 1.32

Gravity: 1.16 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 3.13 AU - 3.61 AU

Year: 2356 Days

Day: 46.8 Hours

Environment

Temp: -123 °C

Axial Tilt: 19.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 93,647,139 km

• M1: 248,781 km (0.11 R)

Planet 4 - Gas Giant

Semi-Major Axis: 5.93 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 161.6

Radius: 11.9

Gravity: 1.14 G

Time & Orbit

Eccentricity (e): 0.189

Orbit Range: 4.81 AU - 7.05 AU

Year: 5499 Days

Day: 12.7 Hours

Environment

Temp: -166 °C

Axial Tilt: 10.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (64)

Outer Limit: 93,647,139 km

• M1: 148,551 km (0.072 R)
• M2: 226,042 km (0.108 R)
• M3: 336,296 km (0.051 R)
• M4: 460,013 km (0.119 R)
• M5: 577,897 km (0.118 R)
• M6: 671,844 km (0.112 R)
• M7: 800,199 km (0.059 R)
• M8: 887,564 km (0.108 R)
• M9: 1,148,612 km (0.066 R)
• M10: 1,271,432 km (0.057 R)
• M11: 1,387,221 km (0.086 R)
• M12: 1,482,515 km (0.095 R)
• M13: 1,912,758 km (0.034 R)
• M14: 2,087,638 km (0.082 R)
• M15: 2,673,912 km (0.114 R)
• M16: 2,763,821 km (0.108 R)
• M17: 2,839,667 km (0.097 R)
• M18: 3,071,394 km (0.11 R)
• M19: 3,309,404 km (0.04 R)
• M20: 3,753,261 km (0.103 R)
• M21: 3,871,443 km (0.092 R)
• M22: 4,233,620 km (0.091 R)
• M23: 4,481,204 km (0.082 R)
• M24: 4,606,866 km (0.088 R)
• M25: 4,824,831 km (0.081 R)
• M26: 4,935,234 km (0.101 R)
• M27: 5,946,216 km (0.079 R)
• M28: 6,084,445 km (0.086 R)
• M29: 6,485,516 km (0.11 R)
• M30: 7,082,262 km (0.095 R)
• M31: 7,934,222 km (0.08 R)
• M32: 8,086,812 km (0.114 R)
• M33: 8,262,141 km (0.102 R)
• M34: 8,416,675 km (0.071 R)
• M35: 8,661,567 km (0.097 R)
• M36: 8,796,056 km (0.074 R)
• M37: 9,044,538 km (0.103 R)
• M38: 9,158,232 km (0.12 R)
• M39: 10,703,728 km (0.114 R)
• M40: 12,454,621 km (0.093 R)
• M41: 13,143,669 km (0.085 R)
• M42: 13,376,144 km (0.075 R)
• M43: 13,505,845 km (0.087 R)
• M44: 13,818,954 km (0.107 R)
• M45: 14,293,029 km (0.07 R)
• M46: 14,665,528 km (0.096 R)
• M47: 14,799,418 km (0.073 R)
• M48: 15,014,241 km (0.096 R)
• M49: 15,474,404 km (0.057 R)
• M50: 15,665,291 km (0.115 R)
• M51: 15,829,549 km (0.076 R)
• M52: 15,966,730 km (0.101 R)
• M53: 16,076,834 km (0.053 R)
• M54: 16,187,238 km (0.099 R)
• M55: 16,325,616 km (0.111 R)
• M56: 17,446,253 km (0.108 R)
• M57: 17,531,225 km (0.066 R)
• M58: 17,844,333 km (0.059 R)
• M59: 17,929,903 km (0.101 R)
• M60: 18,015,772 km (0.098 R)
• M61: 18,245,405 km (0.06 R)
• M62: 18,360,446 km (0.055 R)
• M63: 18,562,553 km (0.079 R)
• M64: 19,027,353 km (0.03 R)

Planet 5 - Gas Giant

Semi-Major Axis: 7.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 225.9

Radius: 9.8

Gravity: 2.35 G

Time & Orbit

Eccentricity (e): 0.122

Orbit Range: 6.18 AU - 7.9 AU

Year: 7113 Days

Day: 12.1 Hours

Environment

Temp: -157 °C

Axial Tilt: 47.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 93,647,139 km

• M1: 207,642 km (0.088 R)
• M2: 293,810 km (0.085 R)
• M3: 479,312 km (0.077 R)
• M4: 650,601 km (0.073 R)
• M5: 903,122 km (0.039 R)
• M6: 1,015,620 km (0.108 R)
• M7: 1,146,219 km (0.039 R)
• M8: 1,268,740 km (0.069 R)
• M9: 1,557,164 km (0.109 R)
• M10: 1,632,562 km (0.084 R)
• M11: 1,693,897 km (0.025 R)
• M12: 1,771,538 km (0.069 R)
• M13: 1,866,383 km (0.08 R)
• M14: 2,094,370 km (0.062 R)
• M15: 2,161,240 km (0.088 R)
• M16: 2,366,339 km (0.118 R)
• M17: 2,488,860 km (0.117 R)
• M18: 2,595,673 km (0.07 R)
• M19: 2,667,629 km (0.088 R)
• M20: 3,000,335 km (0.105 R)
• M21: 3,114,179 km (0.099 R)
• M22: 3,444,641 km (0.114 R)
• M23: 3,806,967 km (0.068 R)
• M24: 4,611,654 km (0.044 R)
• M25: 4,721,458 km (0.075 R)
• M26: 4,876,591 km (0.05 R)
• M27: 5,398,389 km (0.119 R)
• M28: 6,081,453 km (0.101 R)
• M29: 6,274,733 km (0.096 R)
• M30: 6,543,860 km (0.027 R)
• M31: 6,617,911 km (0.081 R)
• M32: 6,692,261 km (0.116 R)
• M33: 6,766,760 km (0.098 R)
• M34: 6,967,222 km (0.054 R)
• M35: 7,271,354 km (0.105 R)
• M36: 7,528,214 km (0.045 R)
• M37: 7,631,885 km (0.096 R)
• M38: 8,856,942 km (0.03 R)
• M39: 8,938,922 km (0.068 R)
• M40: 9,021,200 km (0.103 R)
• M41: 9,214,182 km (0.066 R)
• M42: 9,352,859 km (0.116 R)
• M43: 9,436,334 km (0.1 R)
• M44: 10,400,493 km (0.034 R)
• M45: 11,217,896 km (0.066 R)
• M46: 12,055,793 km (0.092 R)
• M47: 12,238,003 km (0.115 R)
• M48: 12,451,779 km (0.102 R)
• M49: 13,100,286 km (0.07 R)
• M50: 13,225,050 km (0.042 R)
• M51: 13,982,165 km (0.057 R)
• M52: 15,078,568 km (0.109 R)
• M53: 15,802,771 km (0.043 R)
• M54: 15,935,614 km (0.099 R)
• M55: 16,068,906 km (0.071 R)
• M56: 16,673,131 km (0.081 R)
• M57: 16,740,750 km (0.092 R)
• M58: 16,808,518 km (0.028 R)
• M59: 17,114,296 km (0.036 R)
• M60: 17,182,512 km (0.072 R)
• M61: 17,628,015 km (0.086 R)
• M62: 17,696,830 km (0.115 R)
• M63: 18,042,550 km (0.109 R)
• M64: 18,390,515 km (0.049 R)
• M65: 19,341,060 km (0.091 R)
• M66: 19,661,499 km (0.102 R)
• M67: 20,343,665 km (0.08 R)
• M68: 20,560,731 km (0.109 R)
• M69: 20,669,639 km (0.108 R)
• M70: 20,851,400 km (0.081 R)
• M71: 22,175,790 km (0.11 R)
• M72: 22,585,987 km (0.09 R)
• M73: 23,111,525 km (0.117 R)
• M74: 23,224,770 km (0.102 R)
• M75: 23,451,561 km (0.087 R)
• M76: 23,793,242 km (0.107 R)
• M77: 24,136,569 km (0.091 R)
• M78: 25,526,333 km (0.095 R)
• M79: 25,721,409 km (0.038 R)
• M80: 25,995,323 km (0.087 R)
• M81: 26,388,316 km (0.112 R)

Planet 6 - Gas Giant

Semi-Major Axis: 7.12 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 408.9

Radius: 14.9

Gravity: 1.84 G

Time & Orbit

Eccentricity (e): 0.185

Orbit Range: 5.8 AU - 8.44 AU

Year: 7235 Days

Day: 14 Hours

Environment

Temp: -161 °C

Axial Tilt: 29.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 93,647,139 km

• M1: 212,878 km (0.102 R)
• M2: 415,433 km (0.118 R)
• M3: 1,029,533 km (0.101 R)
• M4: 1,132,306 km (0.04 R)
• M5: 1,479,523 km (0.095 R)
• M6: 1,807,292 km (0.095 R)
• M7: 2,064,151 km (0.103 R)
• M8: 2,655,063 km (0.04 R)
• M9: 2,821,416 km (0.09 R)
• M10: 2,991,509 km (0.112 R)
• M11: 3,431,775 km (0.117 R)
• M12: 3,706,138 km (0.079 R)
• M13: 4,011,467 km (0.108 R)
• M14: 4,398,776 km (0.047 R)
• M15: 4,874,497 km (0.109 R)
• M16: 4,976,822 km (0.104 R)
• M17: 5,131,656 km (0.085 R)
• M18: 5,525,846 km (0.116 R)
• M19: 6,316,022 km (0.108 R)
• M20: 6,512,145 km (0.062 R)
• M21: 7,287,511 km (0.061 R)
• M22: 7,760,838 km (0.057 R)
• M23: 8,213,821 km (0.108 R)
• M24: 8,551,463 km (0.09 R)
• M25: 9,335,954 km (0.118 R)
• M26: 9,495,725 km (0.074 R)
• M27: 10,176,395 km (0.074 R)
• M28: 10,373,864 km (0.094 R)
• M29: 10,805,903 km (0.047 R)
• M30: 10,973,752 km (0.111 R)
• M31: 11,825,562 km (0.07 R)
• M32: 12,277,048 km (0.088 R)
• M33: 12,417,072 km (0.107 R)
• M34: 12,804,979 km (0.101 R)
• M35: 13,232,829 km (0.081 R)
• M36: 13,340,540 km (0.092 R)
• M37: 13,484,453 km (0.115 R)
• M38: 13,883,281 km (0.055 R)
• M39: 14,065,790 km (0.055 R)
• M40: 14,322,799 km (0.093 R)
• M41: 14,507,254 km (0.091 R)
• M42: 14,766,806 km (0.102 R)
• M43: 15,403,794 km (0.091 R)
• M44: 15,668,731 km (0.109 R)
• M45: 16,202,945 km (0.07 R)
• M46: 16,549,713 km (0.116 R)
• M47: 17,407,358 km (0.112 R)
• M48: 17,564,884 km (0.063 R)
• M49: 18,239,720 km (0.092 R)
• M50: 18,479,825 km (0.114 R)
• M51: 18,922,934 km (0.058 R)
• M52: 19,328,793 km (0.073 R)
• M53: 19,778,634 km (0.118 R)
• M54: 20,813,701 km (0.107 R)
• M55: 21,358,986 km (0.073 R)
• M56: 22,036,514 km (0.045 R)
• M57: 22,335,112 km (0.08 R)
• M58: 22,463,467 km (0.105 R)
• M59: 23,673,863 km (0.117 R)
• M60: 24,023,473 km (0.043 R)
• M61: 24,330,897 km (0.1 R)
• M62: 25,171,936 km (0.067 R)
• M63: 25,707,945 km (0.075 R)
• M64: 26,973,394 km (0.111 R)
• M65: 27,521,969 km (0.078 R)
• M66: 28,120,361 km (0.09 R)
• M67: 28,676,565 km (0.089 R)
• M68: 28,909,340 km (0.053 R)
• M69: 29,236,361 km (0.094 R)
• M70: 29,376,983 km (0.109 R)
• M71: 30,035,812 km (0.075 R)
• M72: 30,272,176 km (0.109 R)
• M73: 31,752,148 km (0.091 R)

Planet 7 - Ice Giant

Semi-Major Axis: 15.65 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 391.5

Radius: 3.5

Gravity: 31.96 G

Time & Orbit

Eccentricity (e): 0.12

Orbit Range: 13.77 AU - 17.53 AU

Year: 23576 Days

Day: 18.2 Hours

Environment

Temp: -207 °C

Axial Tilt: 26.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 93,647,139 km

• M1: 93,947 km (0.059 R)
• M2: 524,490 km (0.108 R)
• M3: 565,181 km (0.103 R)
• M4: 784,042 km (0.052 R)
• M5: 878,588 km (0.078 R)
• M6: 976,724 km (0.039 R)
• M7: 1,104,481 km (0.118 R)
• M8: 1,697,038 km (0.111 R)
• M9: 2,008,501 km (0.064 R)
• M10: 2,072,978 km (0.092 R)
• M11: 2,683,038 km (0.04 R)
• M12: 4,257,855 km (0.058 R)
• M13: 5,242,957 km (0.117 R)
• M14: 5,466,157 km (0.028 R)
• M15: 5,783,753 km (0.089 R)
• M16: 6,154,008 km (0.082 R)
• M17: 6,389,325 km (0.116 R)
• M18: 6,771,847 km (0.092 R)
• M19: 7,709,975 km (0.066 R)
• M20: 7,811,103 km (0.114 R)
• M21: 8,898,829 km (0.062 R)
• M22: 9,111,258 km (0.116 R)
• M23: 9,379,338 km (0.115 R)
• M24: 9,704,264 km (0.091 R)
• M25: 9,923,126 km (0.117 R)
• M26: 11,040,921 km (0.076 R)
• M27: 11,730,418 km (0.047 R)
• M28: 11,963,491 km (0.063 R)
• M29: 12,552,458 km (0.119 R)
• M30: 12,910,446 km (0.111 R)
• M31: 13,392,899 km (0.062 R)
• M32: 14,437,691 km (0.105 R)
• M33: 15,956,558 km (0.119 R)
• M34: 16,214,614 km (0.119 R)
• M35: 16,408,942 km (0.053 R)
• M36: 16,669,392 km (0.046 R)
• M37: 17,458,969 km (0.118 R)
• M38: 18,395,452 km (0.116 R)
• M39: 19,074,177 km (0.114 R)
• M40: 19,830,395 km (0.087 R)
• M41: 21,798,803 km (0.117 R)
• M42: 21,941,819 km (0.052 R)
• M43: 22,444,617 km (0.097 R)
• M44: 22,516,724 km (0.103 R)
• M45: 22,661,235 km (0.085 R)
• M46: 23,828,547 km (0.102 R)
• M47: 25,089,956 km (0.111 R)
• M48: 25,164,905 km (0.118 R)
• M49: 26,601,643 km (0.11 R)
• M50: 27,137,652 km (0.062 R)
• M51: 27,291,439 km (0.094 R)
• M52: 28,845,162 km (0.119 R)
• M53: 29,395,832 km (0.096 R)
• M54: 29,949,943 km (0.103 R)
• M55: 30,029,379 km (0.09 R)
• M56: 30,347,723 km (0.053 R)
• M57: 30,747,299 km (0.091 R)
• M58: 30,988,002 km (0.047 R)
• M59: 31,713,552 km (0.115 R)
• M60: 31,875,566 km (0.118 R)
• M61: 36,521,478 km (0.088 R)
• M62: 36,606,300 km (0.098 R)
• M63: 37,629,848 km (0.06 R)
• M64: 40,756,294 km (0.086 R)
• M65: 40,932,371 km (0.082 R)
• M66: 41,108,747 km (0.104 R)
• M67: 41,639,371 km (0.094 R)
• M68: 42,083,227 km (0.081 R)
• M69: 43,155,096 km (0.09 R)
• M70: 43,424,372 km (0.046 R)
• M71: 43,604,339 km (0.083 R)
• M72: 44,055,077 km (0.073 R)
• M73: 45,143,252 km (0.042 R)
• M74: 47,716,485 km (0.116 R)
• M75: 48,087,936 km (0.026 R)
• M76: 48,274,036 km (0.093 R)
• M77: 49,959,705 km (0.097 R)
• M78: 53,099,764 km (0.097 R)
• M79: 54,644,961 km (0.08 R)
• M80: 55,325,631 km (0.098 R)
• M81: 55,715,932 km (0.081 R)
• M82: 57,088,941 km (0.043 R)
• M83: 57,384,546 km (0.104 R)
• M84: 57,581,866 km (0.034 R)
• M85: 57,779,485 km (0.108 R)
• M86: 61,475,899 km (0.117 R)
• M87: 61,576,728 km (0.054 R)
• M88: 62,183,646 km (0.095 R)
• M89: 62,285,073 km (0.11 R)
• M90: 64,528,443 km (0.079 R)
• M91: 68,465,261 km (0.091 R)
• M92: 68,989,003 km (0.057 R)
• M93: 69,303,906 km (0.11 R)
• M94: 69,514,091 km (0.094 R)
• M95: 69,935,209 km (0.085 R)
• M96: 70,357,075 km (0.03 R)

Planet 8 - Ice Giant

Semi-Major Axis: 16.65 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 763.2

Radius: 5.6

Gravity: 24.34 G

Time & Orbit

Eccentricity (e): 0.218

Orbit Range: 13.02 AU - 20.28 AU

Year: 25871 Days

Day: 18.5 Hours

Environment

Temp: -194 °C

Axial Tilt: 9.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 93,647,139 km

• M1: 102,774 km (0.101 R)
• M2: 241,601 km (0.076 R)
• M3: 395,986 km (0.085 R)
• M4: 484,847 km (0.111 R)
• M5: 762,800 km (0.059 R)
• M6: 846,574 km (0.107 R)
• M7: 1,147,416 km (0.059 R)
• M8: 1,514,230 km (0.072 R)
• M9: 2,147,477 km (0.117 R)
• M10: 2,554,234 km (0.067 R)
• M11: 3,118,068 km (0.112 R)
• M12: 3,671,581 km (0.115 R)
• M13: 4,557,499 km (0.055 R)
• M14: 6,171,211 km (0.087 R)
• M15: 6,455,896 km (0.111 R)
• M16: 6,861,606 km (0.118 R)
• M17: 7,275,543 km (0.116 R)
• M18: 7,576,235 km (0.078 R)
• M19: 8,439,414 km (0.041 R)
• M20: 8,565,376 km (0.077 R)
• M21: 8,818,944 km (0.11 R)
• M22: 9,010,729 km (0.056 R)
• M23: 9,725,806 km (0.108 R)
• M24: 9,791,779 km (0.116 R)
• M25: 11,072,038 km (0.059 R)
• M26: 11,278,931 km (0.119 R)
• M27: 11,907,542 km (0.105 R)
• M28: 12,119,522 km (0.117 R)
• M29: 14,157,643 km (0.119 R)
• M30: 15,987,225 km (0.104 R)
• M31: 16,299,436 km (0.062 R)
• M32: 16,613,592 km (0.113 R)
• M33: 18,950,011 km (0.113 R)
• M34: 21,301,390 km (0.101 R)
• M35: 23,300,616 km (0.091 R)
• M36: 23,388,879 km (0.068 R)
• M37: 23,654,415 km (0.116 R)
• M38: 23,920,849 km (0.103 R)
• M39: 24,906,549 km (0.118 R)
• M40: 24,996,757 km (0.114 R)
• M41: 25,449,739 km (0.081 R)
• M42: 26,455,635 km (0.102 R)
• M43: 26,639,940 km (0.082 R)
• M44: 27,102,646 km (0.117 R)
• M45: 28,695,265 km (0.083 R)
• M46: 29,455,222 km (0.115 R)
• M47: 30,221,762 km (0.045 R)
• M48: 30,318,103 km (0.101 R)
• M49: 30,704,215 km (0.115 R)
• M50: 30,897,944 km (0.102 R)
• M51: 31,774,438 km (0.103 R)
• M52: 32,659,310 km (0.102 R)
• M53: 37,719,757 km (0.102 R)
• M54: 38,343,131 km (0.096 R)
• M55: 39,284,700 km (0.076 R)
• M56: 40,339,814 km (0.083 R)
• M57: 41,190,577 km (0.082 R)
• M58: 42,154,735 km (0.094 R)
• M59: 42,477,867 km (0.079 R)
• M60: 43,996,135 km (0.089 R)
• M61: 47,197,380 km (0.109 R)
• M62: 47,532,779 km (0.118 R)
• M63: 48,093,621 km (0.074 R)
• M64: 48,882,451 km (0.061 R)
• M65: 51,045,037 km (0.114 R)
• M66: 52,426,873 km (0.073 R)
• M67: 52,774,239 km (0.1 R)
• M68: 54,054,348 km (0.104 R)
• M69: 55,934,793 km (0.054 R)
• M70: 58,315,195 km (0.12 R)
• M71: 61,580,767 km (0.111 R)
• M72: 62,192,024 km (0.086 R)
• M73: 62,314,544 km (0.089 R)
• M74: 63,420,521 km (0.094 R)
• M75: 64,409,064 km (0.038 R)
• M76: 67,279,548 km (0.099 R)
• M77: 68,666,919 km (0.033 R)
• M78: 69,300,765 km (0.119 R)
• M79: 69,681,940 km (0.118 R)
• M80: 73,014,831 km (0.098 R)
• M81: 73,532,141 km (0.114 R)
• M82: 77,319,061 km (0.103 R)
• M83: 77,450,857 km (0.118 R)
• M84: 81,035,222 km (0.08 R)
• M85: 81,168,962 km (0.068 R)
• M86: 81,839,011 km (0.092 R)
• M87: 82,107,539 km (0.102 R)
• M88: 83,454,668 km (0.117 R)
• M89: 84,130,851 km (0.053 R)
• M90: 85,761,318 km (0.096 R)
• M91: 86,443,783 km (0.109 R)
• M92: 87,676,769 km (0.1 R)
• M93: 88,089,061 km (0.053 R)
• M94: 90,437,298 km (0.103 R)
• M95: 92,386,708 km (0.091 R)
• M96: 92,946,204 km (0.114 R)

Kuiper Belt

Range: 30 - 59 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 234 - 19,381 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit