🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.52 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.16

Radius: 1.77

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.055

Orbit Range: 0.49 AU - 0.55 AU

Year: 238 Days

Day: 25.7 Hours

Environment

Temp: -124 °C

Axial Tilt: 32.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 82,557,590 km

• M1: 264,190 km (0.088 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.57 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.72

Radius: 1.24

Gravity: 1.12 G

Time & Orbit

Eccentricity (e): 0.007

Orbit Range: 0.57 AU - 0.57 AU

Year: 274 Days

Day: 36.4 Hours

Environment

Temp: -121 °C

Axial Tilt: 29.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 82,557,590 km

• M1: 119,529 km (0.044 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.21 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 795.2

Radius: 13.9

Gravity: 4.12 G

Time & Orbit

Eccentricity (e): 0.041

Orbit Range: 1.16 AU - 1.26 AU

Year: 846 Days

Day: 14.5 Hours

Environment

Temp: -170 °C

Axial Tilt: 13.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (49)

Outer Limit: 82,557,590 km

• M1: 178,470 km (0.114 R)
• M2: 299,196 km (0.066 R)
• M3: 413,339 km (0.102 R)
• M4: 506,688 km (0.069 R)
• M5: 630,256 km (0.091 R)
• M6: 823,686 km (0.089 R)
• M7: 1,051,673 km (0.05 R)
• M8: 1,301,202 km (0.118 R)
• M9: 1,422,676 km (0.093 R)
• M10: 1,525,898 km (0.04 R)
• M11: 1,708,856 km (0.077 R)
• M12: 1,827,039 km (0.101 R)
• M13: 1,923,679 km (0.084 R)
• M14: 2,080,458 km (0.112 R)
• M15: 2,198,790 km (0.117 R)
• M16: 2,363,048 km (0.112 R)
• M17: 2,460,137 km (0.111 R)
• M18: 2,622,002 km (0.045 R)
• M19: 2,750,357 km (0.099 R)
• M20: 2,880,956 km (0.104 R)
• M21: 3,042,372 km (0.091 R)
• M22: 3,424,295 km (0.109 R)
• M23: 3,514,652 km (0.095 R)
• M24: 3,605,757 km (0.038 R)
• M25: 3,957,462 km (0.064 R)
• M26: 4,116,335 km (0.113 R)
• M27: 4,363,919 km (0.051 R)
• M28: 4,473,126 km (0.101 R)
• M29: 4,616,590 km (0.1 R)
• M30: 4,976,224 km (0.093 R)
• M31: 5,182,519 km (0.119 R)
• M32: 5,344,982 km (0.104 R)
• M33: 5,473,786 km (0.051 R)
• M34: 5,878,748 km (0.111 R)
• M35: 5,975,388 km (0.081 R)
• M36: 6,207,264 km (0.055 R)
• M37: 6,392,467 km (0.096 R)
• M38: 6,566,898 km (0.116 R)
• M39: 6,692,560 km (0.096 R)
• M40: 6,780,972 km (0.097 R)
• M41: 7,332,689 km (0.115 R)
• M42: 7,594,336 km (0.08 R)
• M43: 7,726,281 km (0.119 R)
• M44: 8,167,296 km (0.117 R)
• M45: 8,493,270 km (0.113 R)
• M46: 8,644,064 km (0.091 R)
• M47: 8,990,084 km (0.069 R)
• M48: 9,284,493 km (0.1 R)
• M49: 9,581,893 km (0.102 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.33 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 86.1

Radius: 10.1

Gravity: 0.84 G

Time & Orbit

Eccentricity (e): 0.081

Orbit Range: 1.22 AU - 1.44 AU

Year: 975 Days

Day: 11.1 Hours

Environment

Temp: -174 °C

Axial Tilt: 20.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (32)

Outer Limit: 82,557,590 km

• M1: 133,890 km (0.065 R)
• M2: 211,681 km (0.054 R)
• M3: 284,834 km (0.105 R)
• M4: 352,752 km (0.063 R)
• M5: 495,019 km (0.119 R)
• M6: 641,027 km (0.062 R)
• M7: 730,935 km (0.038 R)
• M8: 817,852 km (0.114 R)
• M9: 932,743 km (0.08 R)
• M10: 1,057,657 km (0.111 R)
• M11: 1,197,381 km (0.076 R)
• M12: 1,297,014 km (0.081 R)
• M13: 1,380,788 km (0.057 R)
• M14: 1,500,317 km (0.073 R)
• M15: 1,663,528 km (0.101 R)
• M16: 1,770,491 km (0.105 R)
• M17: 1,986,061 km (0.1 R)
• M18: 2,391,322 km (0.059 R)
• M19: 2,477,790 km (0.078 R)
• M20: 2,642,198 km (0.03 R)
• M21: 2,725,673 km (0.105 R)
• M22: 3,019,035 km (0.077 R)
• M23: 3,290,405 km (0.066 R)
• M24: 3,374,030 km (0.097 R)
• M25: 3,536,942 km (0.047 R)
• M26: 3,669,187 km (0.059 R)
• M27: 3,904,504 km (0.102 R)
• M28: 4,172,733 km (0.081 R)
• M29: 4,312,607 km (0.066 R)
• M30: 4,446,946 km (0.059 R)
• M31: 4,518,155 km (0.114 R)
• M32: 4,873,001 km (0.078 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 434.3

Radius: 13.8

Gravity: 2.28 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 1.91 AU - 2.05 AU

Year: 1771 Days

Day: 9.2 Hours

Environment

Temp: -190 °C

Axial Tilt: 33 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (59)

Outer Limit: 82,557,590 km

• M1: 228,436 km (0.076 R)
• M2: 384,018 km (0.054 R)
• M3: 523,443 km (0.114 R)
• M4: 772,374 km (0.106 R)
• M5: 961,316 km (0.105 R)
• M6: 1,085,931 km (0.041 R)
• M7: 1,292,226 km (0.114 R)
• M8: 1,387,520 km (0.078 R)
• M9: 1,548,637 km (0.11 R)
• M10: 1,792,930 km (0.061 R)
• M11: 1,900,342 km (0.08 R)
• M12: 2,050,239 km (0.101 R)
• M13: 2,214,796 km (0.104 R)
• M14: 2,459,090 km (0.119 R)
• M15: 2,579,217 km (0.045 R)
• M16: 2,802,716 km (0.07 R)
• M17: 3,269,162 km (0.055 R)
• M18: 3,697,611 km (0.06 R)
• M19: 3,848,704 km (0.086 R)
• M20: 4,002,042 km (0.106 R)
• M21: 4,092,250 km (0.104 R)
• M22: 4,407,303 km (0.106 R)
• M23: 4,689,444 km (0.118 R)
• M24: 4,880,930 km (0.071 R)
• M25: 5,019,308 km (0.049 R)
• M26: 5,144,970 km (0.05 R)
• M27: 5,499,517 km (0.098 R)
• M28: 5,658,240 km (0.045 R)
• M29: 5,891,613 km (0.069 R)
• M30: 5,994,835 km (0.113 R)
• M31: 6,368,082 km (0.099 R)
• M32: 6,458,888 km (0.061 R)
• M33: 6,595,920 km (0.111 R)
• M34: 6,764,517 km (0.097 R)
• M35: 6,857,267 km (0.056 R)
• M36: 7,374,427 km (0.111 R)
• M37: 7,629,641 km (0.086 R)
• M38: 7,823,071 km (0.064 R)
• M39: 7,936,765 km (0.085 R)
• M40: 8,050,909 km (0.112 R)
• M41: 8,330,357 km (0.077 R)
• M42: 8,613,097 km (0.083 R)
• M43: 9,273,871 km (0.099 R)
• M44: 9,584,287 km (0.084 R)
• M45: 9,950,951 km (0.113 R)
• M46: 10,074,070 km (0.057 R)
• M47: 10,286,649 km (0.031 R)
• M48: 10,554,279 km (0.107 R)
• M49: 10,932,912 km (0.063 R)
• M50: 11,023,717 km (0.118 R)
• M51: 11,206,077 km (0.118 R)
• M52: 11,536,838 km (0.072 R)
• M53: 11,740,590 km (0.078 R)
• M54: 11,983,089 km (0.075 R)
• M55: 12,132,986 km (0.1 R)
• M56: 12,283,631 km (0.118 R)
• M57: 12,472,722 km (0.063 R)
• M58: 12,758,305 km (0.117 R)
• M59: 12,911,493 km (0.111 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 815.1

Radius: 11.2

Gravity: 6.5 G

Time & Orbit

Eccentricity (e): 0.167

Orbit Range: 4.9 AU - 6.86 AU

Year: 9066 Days

Day: 8.6 Hours

Environment

Temp: -217 °C

Axial Tilt: 38.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 82,557,590 km

• M1: 167,101 km (0.098 R)
• M2: 263,591 km (0.049 R)
• M3: 373,546 km (0.096 R)
• M4: 577,149 km (0.116 R)
• M5: 669,600 km (0.097 R)
• M6: 767,886 km (0.061 R)
• M7: 999,164 km (0.061 R)
• M8: 1,075,010 km (0.044 R)
• M9: 1,273,676 km (0.099 R)
• M10: 1,463,067 km (0.028 R)
• M11: 1,684,622 km (0.088 R)
• M12: 1,893,610 km (0.095 R)
• M13: 1,965,267 km (0.1 R)
• M14: 2,160,792 km (0.105 R)
• M15: 2,286,304 km (0.101 R)
• M16: 2,840,265 km (0.106 R)
• M17: 3,232,511 km (0.076 R)
• M18: 4,068,164 km (0.049 R)
• M19: 4,835,602 km (0.054 R)
• M20: 5,236,075 km (0.117 R)
• M21: 5,440,426 km (0.047 R)
• M22: 5,786,745 km (0.102 R)
• M23: 6,355,965 km (0.094 R)
• M24: 6,868,786 km (0.035 R)
• M25: 6,943,136 km (0.047 R)
• M26: 7,433,069 km (0.069 R)
• M27: 7,624,555 km (0.072 R)
• M28: 8,208,734 km (0.091 R)
• M29: 8,327,216 km (0.056 R)
• M30: 8,646,308 km (0.115 R)
• M31: 9,378,590 km (0.085 R)
• M32: 10,686,374 km (0.082 R)
• M33: 11,207,872 km (0.035 R)
• M34: 12,185,495 km (0.085 R)
• M35: 12,366,209 km (0.103 R)
• M36: 12,684,553 km (0.053 R)
• M37: 12,867,661 km (0.103 R)
• M38: 13,143,968 km (0.1 R)
• M39: 13,375,845 km (0.119 R)
• M40: 13,984,858 km (0.098 R)
• M41: 17,062,535 km (0.105 R)
• M42: 17,315,505 km (0.086 R)
• M43: 18,288,190 km (0.072 R)
• M44: 18,443,323 km (0.052 R)
• M45: 18,963,774 km (0.118 R)
• M46: 19,383,695 km (0.053 R)
• M47: 20,393,182 km (0.106 R)
• M48: 22,297,114 km (0.1 R)
• M49: 22,851,524 km (0.075 R)
• M50: 23,186,324 km (0.112 R)
• M51: 25,229,232 km (0.11 R)
• M52: 26,097,349 km (0.078 R)
• M53: 26,505,900 km (0.105 R)
• M54: 27,210,955 km (0.036 R)
• M55: 27,981,983 km (0.055 R)
• M56: 28,220,591 km (0.063 R)
• M57: 29,181,907 km (0.052 R)
• M58: 29,484,544 km (0.038 R)
• M59: 30,766,896 km (0.054 R)
• M60: 31,322,204 km (0.072 R)
• M61: 31,445,921 km (0.11 R)
• M62: 33,512,466 km (0.1 R)
• M63: 34,020,052 km (0.098 R)
• M64: 34,530,181 km (0.111 R)
• M65: 34,978,675 km (0.097 R)
• M66: 36,075,676 km (0.058 R)
• M67: 36,530,753 km (0.062 R)
• M68: 37,315,244 km (0.105 R)
• M69: 38,039,148 km (0.118 R)
• M70: 38,502,303 km (0.049 R)
• M71: 39,501,019 km (0.093 R)
• M72: 39,634,759 km (0.098 R)
• M73: 40,575,730 km (0.045 R)
• M74: 40,778,285 km (0.105 R)
• M75: 42,342,481 km (0.072 R)
• M76: 43,097,501 km (0.086 R)
• M77: 43,235,281 km (0.092 R)
• M78: 43,718,631 km (0.112 R)
• M79: 43,926,273 km (0.12 R)
• M80: 45,109,443 km (0.119 R)
• M81: 45,529,514 km (0.109 R)
• M82: 45,669,836 km (0.081 R)
• M83: 45,880,470 km (0.065 R)
• M84: 46,939,025 km (0.102 R)

Planet 7 - Ice Giant

Semi-Major Axis: 6.64 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 310.6

Radius: 4.4

Gravity: 16.04 G

Time & Orbit

Eccentricity (e): 0.228

Orbit Range: 5.13 AU - 8.15 AU

Year: 10879 Days

Day: 24.7 Hours

Environment

Temp: -214 °C

Axial Tilt: 28.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 82,557,590 km

• M1: 112,348 km (0.102 R)
• M2: 173,085 km (0.087 R)
• M3: 267,032 km (0.076 R)
• M4: 389,553 km (0.034 R)
• M5: 684,560 km (0.115 R)
• M6: 837,748 km (0.08 R)
• M7: 934,837 km (0.105 R)
• M8: 1,551,928 km (0.079 R)
• M9: 1,794,426 km (0.076 R)
• M10: 1,856,958 km (0.093 R)
• M11: 1,984,117 km (0.111 R)
• M12: 2,428,422 km (0.06 R)
• M13: 2,638,009 km (0.078 R)
• M14: 2,733,153 km (0.076 R)
• M15: 3,378,369 km (0.106 R)
• M16: 4,068,464 km (0.12 R)
• M17: 4,095,840 km (0.074 R)
• M18: 4,916,833 km (0.07 R)
• M19: 5,301,001 km (0.083 R)
• M20: 5,542,152 km (0.114 R)
• M21: 5,756,227 km (0.06 R)
• M22: 5,786,894 km (0.055 R)
• M23: 6,255,435 km (0.083 R)
• M24: 6,606,541 km (0.083 R)
• M25: 6,735,943 km (0.101 R)
• M26: 7,529,261 km (0.115 R)
• M27: 7,596,729 km (0.104 R)
• M28: 7,698,157 km (0.071 R)
• M29: 8,844,525 km (0.093 R)
• M30: 8,880,130 km (0.116 R)
• M31: 9,674,345 km (0.104 R)
• M32: 9,931,952 km (0.098 R)
• M33: 10,266,303 km (0.045 R)
• M34: 10,604,395 km (0.09 R)
• M35: 11,022,521 km (0.103 R)
• M36: 11,060,818 km (0.057 R)
• M37: 11,407,286 km (0.104 R)
• M38: 11,562,419 km (0.109 R)
• M39: 11,601,464 km (0.079 R)
• M40: 11,796,540 km (0.106 R)
• M41: 11,874,929 km (0.101 R)
• M42: 13,070,964 km (0.037 R)
• M43: 13,765,697 km (0.098 R)
• M44: 13,930,853 km (0.093 R)
• M45: 14,598,209 km (0.047 R)
• M46: 14,682,283 km (0.055 R)
• M47: 15,233,252 km (0.085 R)
• M48: 16,486,284 km (0.049 R)
• M49: 16,881,821 km (0.117 R)
• M50: 17,637,589 km (0.08 R)
• M51: 18,222,965 km (0.066 R)
• M52: 18,540,711 km (0.077 R)
• M53: 18,586,189 km (0.104 R)
• M54: 18,997,882 km (0.044 R)
• M55: 20,016,644 km (0.116 R)
• M56: 20,063,468 km (0.105 R)
• M57: 20,297,589 km (0.112 R)
• M58: 20,579,880 km (0.116 R)
• M59: 21,291,218 km (0.049 R)
• M60: 21,482,254 km (0.102 R)
• M61: 21,817,802 km (0.028 R)
• M62: 22,543,053 km (0.055 R)
• M63: 22,932,905 km (0.113 R)
• M64: 23,275,933 km (0.106 R)
• M65: 25,521,546 km (0.12 R)
• M66: 26,285,243 km (0.094 R)
• M67: 26,953,198 km (0.101 R)
• M68: 27,574,628 km (0.113 R)
• M69: 27,887,137 km (0.102 R)
• M70: 28,410,730 km (0.106 R)
• M71: 29,361,125 km (0.091 R)
• M72: 30,268,287 km (0.043 R)
• M73: 31,130,419 km (0.068 R)
• M74: 31,619,006 km (0.112 R)
• M75: 31,946,027 km (0.115 R)
• M76: 32,000,630 km (0.102 R)
• M77: 32,878,919 km (0.059 R)
• M78: 33,044,524 km (0.037 R)
• M79: 34,099,339 km (0.093 R)
• M80: 34,546,786 km (0.105 R)
• M81: 35,844,099 km (0.07 R)
• M82: 36,014,491 km (0.092 R)
• M83: 36,071,338 km (0.081 R)
• M84: 36,128,185 km (0.107 R)
• M85: 37,042,378 km (0.034 R)
• M86: 37,675,326 km (0.08 R)
• M87: 38,079,839 km (0.044 R)
• M88: 38,369,759 km (0.117 R)
• M89: 38,544,041 km (0.088 R)

Planet 8 - Ice Giant

Semi-Major Axis: 11.39 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 585.9

Radius: 7.7

Gravity: 9.88 G

Time & Orbit

Eccentricity (e): 0.051

Orbit Range: 10.81 AU - 11.97 AU

Year: 24441 Days

Day: 17.5 Hours

Environment

Temp: -241 °C

Axial Tilt: 35.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 82,557,590 km

• M1: 166,203 km (0.107 R)
• M2: 482,154 km (0.106 R)
• M3: 780,302 km (0.08 R)
• M4: 2,139,250 km (0.102 R)
• M5: 2,472,254 km (0.113 R)
• M6: 2,625,592 km (0.088 R)
• M7: 4,231,525 km (0.103 R)
• M8: 5,225,603 km (0.072 R)
• M9: 5,572,521 km (0.057 R)
• M10: 5,622,636 km (0.118 R)
• M11: 6,236,436 km (0.114 R)
• M12: 6,710,661 km (0.079 R)
• M13: 7,251,158 km (0.064 R)
• M14: 7,306,061 km (0.027 R)
• M15: 7,416,165 km (0.1 R)
• M16: 8,259,149 km (0.083 R)
• M17: 8,779,600 km (0.069 R)
• M18: 9,670,306 km (0.059 R)
• M19: 9,973,540 km (0.06 R)
• M20: 10,651,817 km (0.076 R)
• M21: 10,776,731 km (0.103 R)
• M22: 10,902,244 km (0.062 R)
• M23: 11,536,539 km (0.06 R)
• M24: 13,645,570 km (0.045 R)
• M25: 14,397,598 km (0.119 R)
• M26: 15,022,917 km (0.119 R)
• M27: 15,515,394 km (0.053 R)
• M28: 16,588,459 km (0.078 R)
• M29: 16,805,974 km (0.092 R)
• M30: 17,611,409 km (0.107 R)
• M31: 19,032,290 km (0.114 R)
• M32: 19,259,978 km (0.087 R)
• M33: 19,948,427 km (0.052 R)
• M34: 20,489,523 km (0.106 R)
• M35: 21,823,487 km (0.056 R)
• M36: 21,982,360 km (0.09 R)
• M37: 22,461,073 km (0.101 R)
• M38: 22,701,626 km (0.052 R)
• M39: 24,409,885 km (0.056 R)
• M40: 24,657,319 km (0.081 R)
• M41: 26,159,132 km (0.115 R)
• M42: 27,862,304 km (0.116 R)
• M43: 28,293,595 km (0.087 R)
• M44: 29,600,931 km (0.074 R)
• M45: 30,129,460 km (0.106 R)
• M46: 30,483,409 km (0.117 R)
• M47: 30,749,842 km (0.101 R)
• M48: 30,838,853 km (0.112 R)
• M49: 33,273,558 km (0.085 R)
• M50: 33,731,178 km (0.068 R)
• M51: 34,190,893 km (0.098 R)
• M52: 35,302,704 km (0.104 R)
• M53: 37,181,803 km (0.087 R)
• M54: 39,769,696 km (0.115 R)
• M55: 41,428,737 km (0.034 R)
• M56: 42,514,219 km (0.037 R)
• M57: 43,509,194 km (0.093 R)
• M58: 45,015,944 km (0.103 R)
• M59: 45,623,461 km (0.116 R)
• M60: 46,131,795 km (0.116 R)
• M61: 46,641,923 km (0.119 R)
• M62: 49,846,609 km (0.051 R)
• M63: 51,634,004 km (0.098 R)
• M64: 54,300,287 km (0.113 R)
• M65: 55,921,479 km (0.065 R)
• M66: 56,356,510 km (0.041 R)
• M67: 56,901,794 km (0.11 R)
• M68: 58,548,268 km (0.058 R)
• M69: 59,100,584 km (0.047 R)
• M70: 60,656,252 km (0.097 R)
• M71: 61,327,049 km (0.11 R)
• M72: 61,775,693 km (0.105 R)
• M73: 63,807,681 km (0.065 R)
• M74: 64,376,153 km (0.076 R)
• M75: 64,603,840 km (0.086 R)
• M76: 64,717,834 km (0.098 R)
• M77: 65,517,883 km (0.079 R)
• M78: 65,861,659 km (0.105 R)
• M79: 66,896,727 km (0.111 R)
• M80: 67,705,453 km (0.108 R)
• M81: 68,750,095 km (0.117 R)
• M82: 69,449,465 km (0.085 R)
• M83: 70,502,933 km (0.059 R)
• M84: 70,620,218 km (0.032 R)
• M85: 72,507,096 km (0.064 R)
• M86: 72,625,577 km (0.092 R)
• M87: 73,575,823 km (0.081 R)
• M88: 73,694,903 km (0.085 R)
• M89: 74,171,821 km (0.03 R)
• M90: 74,291,200 km (0.113 R)
• M91: 75,008,821 km (0.117 R)
• M92: 76,571,521 km (0.092 R)
• M93: 76,933,697 km (0.041 R)
• M94: 77,538,521 km (0.117 R)
• M95: 78,023,517 km (0.077 R)
• M96: 79,240,496 km (0.113 R)
• M97: 81,939,840 km (0.08 R)

Kuiper Belt

Range: 30 - 58 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 161 - 10,696 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit