🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.72 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.19

Radius: 1.59

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 0.67 AU - 0.77 AU

Year: 261 Days

Day: 35.7 Hours

Environment

Temp: -4 °C

Axial Tilt: 4.9 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 2 - Terrestrial

Semi-Major Axis: 0.77 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.44

Radius: 1.43

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.098

Orbit Range: 0.69 AU - 0.85 AU

Year: 289 Days

Day: 43 Hours

Environment

Temp: 6 °C

Axial Tilt: 11.9 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 3 - Terrestrial

Semi-Major Axis: 0.81 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.5

Radius: 1.83

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.22

Orbit Range: 0.63 AU - 0.99 AU

Year: 312 Days

Day: 13.3 Hours

Environment

Temp: -19 °C

Axial Tilt: 15.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 69,693,076 km

• M1: 258,356 km (0.069 R)

Planet 4 - Terrestrial

Semi-Major Axis: 2.14 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.23

Radius: 1.6

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.181

Orbit Range: 1.75 AU - 2.53 AU

Year: 1338 Days

Day: 15.9 Hours

Environment

Temp: -119 °C

Axial Tilt: 30 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 3.27 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 714.2

Radius: 14.1

Gravity: 3.59 G

Time & Orbit

Eccentricity (e): 0.055

Orbit Range: 3.09 AU - 3.45 AU

Year: 2528 Days

Day: 14.4 Hours

Environment

Temp: -151 °C

Axial Tilt: 38.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (62)

Outer Limit: 69,693,076 km

• M1: 256,112 km (0.043 R)
• M2: 353,051 km (0.094 R)
• M3: 570,865 km (0.119 R)
• M4: 686,654 km (0.084 R)
• M5: 1,130,511 km (0.096 R)
• M6: 1,584,989 km (0.109 R)
• M7: 1,695,243 km (0.032 R)
• M8: 1,949,559 km (0.079 R)
• M9: 2,203,128 km (0.072 R)
• M10: 2,743,027 km (0.088 R)
• M11: 3,120,612 km (0.064 R)
• M12: 3,229,369 km (0.112 R)
• M13: 3,339,473 km (0.111 R)
• M14: 3,515,101 km (0.107 R)
• M15: 3,612,190 km (0.094 R)
• M16: 3,710,177 km (0.107 R)
• M17: 3,842,421 km (0.093 R)
• M18: 5,046,834 km (0.118 R)
• M19: 5,379,390 km (0.094 R)
• M20: 5,623,982 km (0.086 R)
• M21: 5,719,127 km (0.037 R)
• M22: 5,968,805 km (0.114 R)
• M23: 6,104,940 km (0.075 R)
• M24: 6,222,374 km (0.049 R)
• M25: 6,599,061 km (0.1 R)
• M26: 7,500,388 km (0.048 R)
• M27: 7,795,395 km (0.042 R)
• M28: 8,029,815 km (0.086 R)
• M29: 8,201,853 km (0.087 R)
• M30: 8,440,312 km (0.103 R)
• M31: 8,725,146 km (0.062 R)
• M32: 8,946,551 km (0.088 R)
• M33: 9,080,142 km (0.102 R)
• M34: 9,214,481 km (0.07 R)
• M35: 9,667,164 km (0.101 R)
• M36: 9,896,198 km (0.082 R)
• M37: 10,034,576 km (0.051 R)
• M38: 10,313,128 km (0.05 R)
• M39: 10,688,618 km (0.117 R)
• M40: 10,806,950 km (0.113 R)
• M41: 10,949,367 km (0.088 R)
• M42: 11,622,707 km (0.088 R)
• M43: 11,768,715 km (0.085 R)
• M44: 11,988,923 km (0.065 R)
• M45: 12,532,861 km (0.096 R)
• M46: 13,034,462 km (0.094 R)
• M47: 13,237,018 km (0.115 R)
• M48: 13,491,634 km (0.063 R)
• M49: 13,593,959 km (0.11 R)
• M50: 14,109,323 km (0.082 R)
• M51: 14,343,444 km (0.083 R)
• M52: 14,552,582 km (0.073 R)
• M53: 14,736,288 km (0.082 R)
• M54: 14,868,084 km (0.092 R)
• M55: 16,180,206 km (0.045 R)
• M56: 16,589,357 km (0.109 R)
• M57: 16,726,388 km (0.053 R)
• M58: 17,084,675 km (0.09 R)
• M59: 17,668,855 km (0.116 R)
• M60: 18,344,588 km (0.118 R)
• M61: 18,571,678 km (0.103 R)
• M62: 18,885,534 km (0.086 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.42 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 788.9

Radius: 13

Gravity: 4.67 G

Time & Orbit

Eccentricity (e): 0.139

Orbit Range: 2.94 AU - 3.9 AU

Year: 2704 Days

Day: 6.5 Hours

Environment

Temp: -155 °C

Axial Tilt: 32.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 69,693,076 km

• M1: 200,012 km (0.106 R)
• M2: 367,412 km (0.025 R)
• M3: 491,279 km (0.111 R)
• M4: 624,571 km (0.036 R)
• M5: 715,227 km (0.035 R)
• M6: 860,786 km (0.109 R)
• M7: 1,421,479 km (0.107 R)
• M8: 1,508,395 km (0.056 R)
• M9: 1,740,422 km (0.08 R)
• M10: 2,139,250 km (0.066 R)
• M11: 2,283,611 km (0.077 R)
• M12: 2,371,725 km (0.075 R)
• M13: 2,689,770 km (0.083 R)
• M14: 2,861,807 km (0.114 R)
• M15: 3,070,197 km (0.064 R)
• M16: 3,283,524 km (0.119 R)
• M17: 3,742,340 km (0.06 R)
• M18: 3,847,208 km (0.102 R)
• M19: 3,988,429 km (0.068 R)
• M20: 4,077,739 km (0.04 R)
• M21: 4,312,757 km (0.084 R)
• M22: 4,496,762 km (0.086 R)
• M23: 4,645,762 km (0.088 R)
• M24: 4,739,709 km (0.091 R)
• M25: 5,297,709 km (0.079 R)
• M26: 5,415,742 km (0.086 R)
• M27: 5,514,776 km (0.091 R)
• M28: 5,674,546 km (0.101 R)
• M29: 5,856,158 km (0.029 R)
• M30: 6,204,572 km (0.051 R)
• M31: 6,580,810 km (0.09 R)
• M32: 6,686,726 km (0.107 R)
• M33: 7,007,763 km (0.051 R)
• M34: 7,159,305 km (0.108 R)
• M35: 7,665,096 km (0.097 R)
• M36: 7,754,256 km (0.105 R)
• M37: 7,866,155 km (0.084 R)
• M38: 8,001,242 km (0.069 R)
• M39: 8,296,399 km (0.098 R)
• M40: 8,734,421 km (0.06 R)
• M41: 8,850,958 km (0.116 R)
• M42: 9,015,067 km (0.099 R)
• M43: 9,826,037 km (0.082 R)
• M44: 10,486,811 km (0.029 R)
• M45: 10,610,827 km (0.074 R)
• M46: 10,785,109 km (0.09 R)
• M47: 11,060,967 km (0.101 R)
• M48: 11,517,540 km (0.087 R)
• M49: 11,748,220 km (0.064 R)
• M50: 12,032,157 km (0.102 R)
• M51: 12,370,697 km (0.063 R)
• M52: 12,950,837 km (0.061 R)
• M53: 13,083,830 km (0.086 R)
• M54: 13,864,731 km (0.037 R)
• M55: 14,329,531 km (0.093 R)
• M56: 14,605,390 km (0.08 R)
• M57: 15,134,218 km (0.1 R)
• M58: 15,868,145 km (0.107 R)
• M59: 16,153,578 km (0.062 R)
• M60: 16,527,124 km (0.114 R)
• M61: 16,642,614 km (0.094 R)
• M62: 16,758,402 km (0.099 R)
• M63: 16,990,877 km (0.118 R)
• M64: 17,195,078 km (0.088 R)
• M65: 17,753,527 km (0.087 R)
• M66: 18,317,960 km (0.092 R)
• M67: 18,948,665 km (0.108 R)
• M68: 19,251,451 km (0.119 R)
• M69: 19,494,996 km (0.118 R)
• M70: 20,046,414 km (0.09 R)
• M71: 20,262,284 km (0.057 R)
• M72: 20,727,383 km (0.076 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.95 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 738.4

Radius: 13.6

Gravity: 3.99 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 3.32 AU - 4.58 AU

Year: 3356 Days

Day: 8.7 Hours

Environment

Temp: -166 °C

Axial Tilt: 19.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 69,693,076 km

• M1: 221,405 km (0.119 R)
• M2: 343,626 km (0.055 R)
• M3: 605,572 km (0.076 R)
• M4: 773,870 km (0.102 R)
• M5: 959,521 km (0.118 R)
• M6: 1,088,175 km (0.036 R)
• M7: 1,273,676 km (0.063 R)
• M8: 1,593,217 km (0.117 R)
• M9: 1,719,927 km (0.066 R)
• M10: 1,820,905 km (0.082 R)
• M11: 2,120,849 km (0.105 R)
• M12: 2,617,514 km (0.054 R)
• M13: 2,768,458 km (0.114 R)
• M14: 2,922,544 km (0.035 R)
• M15: 3,009,460 km (0.047 R)
• M16: 3,097,125 km (0.118 R)
• M17: 3,329,450 km (0.073 R)
• M18: 3,623,260 km (0.103 R)
• M19: 4,099,580 km (0.115 R)
• M20: 4,535,359 km (0.111 R)
• M21: 4,861,632 km (0.054 R)
• M22: 5,006,891 km (0.064 R)
• M23: 5,111,610 km (0.075 R)
• M24: 5,689,357 km (0.117 R)
• M25: 5,820,554 km (0.098 R)
• M26: 6,153,110 km (0.056 R)
• M27: 6,310,487 km (0.09 R)
• M28: 6,514,838 km (0.093 R)
• M29: 6,767,658 km (0.083 R)
• M30: 7,282,873 km (0.102 R)
• M31: 7,810,804 km (0.119 R)
• M32: 8,550,865 km (0.096 R)
• M33: 8,701,510 km (0.077 R)
• M34: 8,878,484 km (0.107 R)
• M35: 9,236,023 km (0.094 R)
• M36: 9,364,976 km (0.115 R)
• M37: 9,781,307 km (0.12 R)
• M38: 10,150,664 km (0.074 R)
• M39: 10,257,028 km (0.086 R)
• M40: 10,417,248 km (0.099 R)
• M41: 10,903,142 km (0.119 R)
• M42: 11,785,021 km (0.035 R)
• M43: 11,896,920 km (0.089 R)
• M44: 13,383,325 km (0.114 R)
• M45: 13,734,730 km (0.112 R)
• M46: 13,970,646 km (0.025 R)
• M47: 14,356,758 km (0.109 R)
• M48: 14,988,211 km (0.072 R)
• M49: 15,383,598 km (0.066 R)
• M50: 15,628,789 km (0.053 R)
• M51: 15,720,941 km (0.112 R)
• M52: 15,905,994 km (0.036 R)
• M53: 16,247,077 km (0.048 R)
• M54: 16,590,553 km (0.102 R)
• M55: 16,716,066 km (0.113 R)
• M56: 17,157,829 km (0.042 R)
• M57: 17,348,416 km (0.102 R)
• M58: 17,603,481 km (0.103 R)
• M59: 19,490,359 km (0.049 R)
• M60: 19,788,806 km (0.113 R)
• M61: 19,921,948 km (0.078 R)
• M62: 20,222,790 km (0.053 R)
• M63: 20,761,043 km (0.1 R)
• M64: 20,964,197 km (0.116 R)
• M65: 21,406,408 km (0.037 R)
• M66: 22,196,584 km (0.068 R)
• M67: 22,543,053 km (0.115 R)
• M68: 22,751,891 km (0.113 R)
• M69: 23,276,681 km (0.096 R)
• M70: 23,558,224 km (0.054 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4.68 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 56.7

Radius: 10.8

Gravity: 0.49 G

Time & Orbit

Eccentricity (e): 0.103

Orbit Range: 4.2 AU - 5.16 AU

Year: 4328 Days

Day: 6.2 Hours

Environment

Temp: -166 °C

Axial Tilt: 29.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 69,693,076 km

• M1: 146,157 km (0.109 R)
• M2: 228,885 km (0.08 R)
• M3: 367,412 km (0.1 R)
• M4: 524,939 km (0.061 R)
• M5: 869,463 km (0.059 R)
• M6: 2,085,993 km (0.107 R)
• M7: 2,174,106 km (0.109 R)
• M8: 2,384,889 km (0.089 R)
• M9: 3,057,182 km (0.113 R)
• M10: 3,146,642 km (0.093 R)
• M11: 3,513,306 km (0.104 R)
• M12: 3,737,553 km (0.065 R)
• M13: 4,003,239 km (0.085 R)
• M14: 4,733,127 km (0.075 R)
• M15: 4,876,292 km (0.087 R)
• M16: 5,007,639 km (0.114 R)
• M17: 5,100,240 km (0.091 R)
• M18: 5,327,629 km (0.107 R)
• M19: 5,764,904 km (0.117 R)
• M20: 5,959,830 km (0.091 R)
• M21: 6,572,134 km (0.118 R)
• M22: 6,659,200 km (0.119 R)
• M23: 6,967,072 km (0.064 R)
• M24: 7,159,904 km (0.087 R)
• M25: 8,057,491 km (0.098 R)
• M26: 8,990,234 km (0.07 R)
• M27: 9,281,650 km (0.109 R)
• M28: 9,461,317 km (0.113 R)
• M29: 9,625,576 km (0.102 R)
• M30: 9,957,085 km (0.101 R)
• M31: 10,325,993 km (0.094 R)
• M32: 10,665,281 km (0.03 R)
• M33: 11,042,866 km (0.087 R)

Planet 9 - Gas Giant

Semi-Major Axis: 9.68 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 741.5

Radius: 9.8

Gravity: 7.72 G

Time & Orbit

Eccentricity (e): 0.128

Orbit Range: 8.44 AU - 10.92 AU

Year: 12875 Days

Day: 11.8 Hours

Environment

Temp: -205 °C

Axial Tilt: 49.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 69,693,076 km

• M1: 136,583 km (0.114 R)
• M2: 274,063 km (0.084 R)
• M3: 851,212 km (0.094 R)
• M4: 1,486,704 km (0.05 R)
• M5: 1,959,882 km (0.104 R)
• M6: 2,690,667 km (0.088 R)
• M7: 2,752,601 km (0.116 R)
• M8: 2,877,814 km (0.085 R)
• M9: 3,232,062 km (0.12 R)
• M10: 3,498,645 km (0.112 R)
• M11: 3,737,703 km (0.092 R)
• M12: 4,340,582 km (0.111 R)
• M13: 4,486,889 km (0.112 R)
• M14: 5,088,572 km (0.114 R)
• M15: 7,041,422 km (0.111 R)
• M16: 7,213,759 km (0.097 R)
• M17: 7,474,807 km (0.084 R)
• M18: 7,606,453 km (0.037 R)
• M19: 7,694,716 km (0.115 R)
• M20: 7,872,139 km (0.071 R)
• M21: 7,961,449 km (0.1 R)
• M22: 8,051,058 km (0.106 R)
• M23: 8,687,597 km (0.096 R)
• M24: 8,965,400 km (0.104 R)
• M25: 9,434,988 km (0.052 R)
• M26: 10,495,936 km (0.073 R)
• M27: 13,469,493 km (0.049 R)
• M28: 14,442,029 km (0.109 R)
• M29: 14,606,287 km (0.059 R)
• M30: 15,269,604 km (0.113 R)
• M31: 15,437,004 km (0.106 R)
• M32: 16,169,435 km (0.082 R)
• M33: 16,740,451 km (0.084 R)
• M34: 16,913,086 km (0.102 R)
• M35: 17,667,808 km (0.112 R)
• M36: 18,019,961 km (0.086 R)
• M37: 18,552,380 km (0.115 R)
• M38: 18,671,460 km (0.061 R)
• M39: 19,210,311 km (0.086 R)
• M40: 19,754,100 km (0.112 R)
• M41: 19,997,495 km (0.101 R)
• M42: 21,416,132 km (0.098 R)
• M43: 22,485,458 km (0.076 R)
• M44: 23,058,567 km (0.065 R)
• M45: 23,894,969 km (0.066 R)
• M46: 23,959,745 km (0.081 R)
• M47: 24,024,520 km (0.103 R)
• M48: 25,200,958 km (0.106 R)
• M49: 26,262,505 km (0.083 R)
• M50: 28,291,800 km (0.12 R)
• M51: 28,497,497 km (0.104 R)
• M52: 28,703,792 km (0.079 R)
• M53: 29,603,025 km (0.03 R)
• M54: 30,161,025 km (0.1 R)
• M55: 30,371,210 km (0.063 R)
• M56: 30,441,372 km (0.07 R)
• M57: 30,652,155 km (0.082 R)
• M58: 31,004,458 km (0.089 R)
• M59: 31,287,347 km (0.089 R)
• M60: 31,429,166 km (0.075 R)
• M61: 31,642,194 km (0.117 R)
• M62: 32,355,925 km (0.113 R)
• M63: 32,786,617 km (0.079 R)
• M64: 35,336,962 km (0.06 R)
• M65: 37,950,287 km (0.082 R)
• M66: 38,480,462 km (0.112 R)
• M67: 38,708,449 km (0.082 R)
• M68: 40,239,434 km (0.104 R)
• M69: 40,470,862 km (0.101 R)
• M70: 40,934,914 km (0.082 R)
• M71: 41,712,374 km (0.09 R)
• M72: 41,946,495 km (0.08 R)
• M73: 44,312,086 km (0.118 R)
• M74: 44,790,350 km (0.117 R)
• M75: 45,190,226 km (0.092 R)
• M76: 46,235,616 km (0.089 R)
• M77: 47,207,553 km (0.041 R)
• M78: 50,745,243 km (0.113 R)
• M79: 50,995,221 km (0.046 R)
• M80: 51,831,473 km (0.068 R)
• M81: 56,080,352 km (0.069 R)
• M82: 56,597,662 km (0.115 R)
• M83: 56,683,980 km (0.083 R)
• M84: 57,203,234 km (0.086 R)

Planet 10 - Ice Giant

Semi-Major Axis: 16.56 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 253.7

Radius: 5.5

Gravity: 8.39 G

Time & Orbit

Eccentricity (e): 0.186

Orbit Range: 13.48 AU - 19.64 AU

Year: 28808 Days

Day: 17.9 Hours

Environment

Temp: -217 °C

Axial Tilt: 16.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 69,693,076 km

• M1: 100,829 km (0.075 R)
• M2: 360,232 km (0.113 R)
• M3: 1,498,522 km (0.056 R)
• M4: 2,336,569 km (0.076 R)
• M5: 2,471,207 km (0.102 R)
• M6: 3,071,843 km (0.072 R)
• M7: 3,912,732 km (0.06 R)
• M8: 4,991,782 km (0.059 R)
• M9: 5,653,453 km (0.111 R)
• M10: 6,530,845 km (0.047 R)
• M11: 7,057,878 km (0.084 R)
• M12: 7,106,497 km (0.115 R)
• M13: 7,302,022 km (0.073 R)
• M14: 7,449,675 km (0.091 R)
• M15: 8,357,135 km (0.088 R)
• M16: 8,928,599 km (0.106 R)
• M17: 9,512,629 km (0.068 R)
• M18: 10,218,731 km (0.107 R)
• M19: 12,612,746 km (0.086 R)
• M20: 12,968,340 km (0.05 R)
• M21: 15,169,972 km (0.082 R)
• M22: 15,611,435 km (0.119 R)
• M23: 17,156,482 km (0.092 R)
• M24: 17,484,401 km (0.043 R)
• M25: 18,146,521 km (0.099 R)
• M26: 18,346,832 km (0.075 R)
• M27: 18,951,956 km (0.106 R)
• M28: 19,700,394 km (0.118 R)
• M29: 20,181,800 km (0.095 R)
• M30: 20,389,292 km (0.108 R)
• M31: 21,226,143 km (0.063 R)
• M32: 22,359,496 km (0.067 R)
• M33: 24,758,298 km (0.08 R)
• M34: 27,390,323 km (0.114 R)
• M35: 28,158,358 km (0.116 R)
• M36: 28,855,784 km (0.06 R)
• M37: 29,637,283 km (0.093 R)
• M38: 31,862,402 km (0.058 R)
• M39: 32,265,418 km (0.094 R)
• M40: 34,967,006 km (0.093 R)
• M41: 36,807,808 km (0.068 R)
• M42: 36,892,331 km (0.063 R)
• M43: 37,315,394 km (0.098 R)
• M44: 38,166,456 km (0.091 R)
• M45: 38,937,783 km (0.06 R)
• M46: 39,541,260 km (0.06 R)
• M47: 40,061,113 km (0.076 R)
• M48: 40,234,796 km (0.103 R)
• M49: 42,250,927 km (0.088 R)
• M50: 44,030,692 km (0.051 R)
• M51: 46,289,471 km (0.089 R)
• M52: 47,387,070 km (0.091 R)
• M53: 47,662,779 km (0.085 R)
• M54: 48,678,399 km (0.091 R)
• M55: 49,701,050 km (0.062 R)
• M56: 50,449,339 km (0.058 R)
• M57: 50,636,934 km (0.055 R)
• M58: 51,012,874 km (0.114 R)
• M59: 52,336,067 km (0.077 R)
• M60: 54,438,067 km (0.079 R)
• M61: 56,664,981 km (0.073 R)
• M62: 57,250,806 km (0.097 R)
• M63: 57,838,576 km (0.069 R)
• M64: 62,915,180 km (0.108 R)
• M65: 63,420,521 km (0.057 R)
• M66: 64,333,517 km (0.117 R)
• M67: 64,537,120 km (0.079 R)
• M68: 66,377,922 km (0.109 R)
• M69: 67,201,757 km (0.114 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 450 - 11,121 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit