🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.45 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.9 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 138.5

Radius: 11.6

Gravity: 1.03 G

Time & Orbit

Eccentricity (e): 0.143

Orbit Range: 0.77 AU - 1.03 AU

Year: 560 Days

Day: 6.4 Hours

Environment

Temp: -149 °C

Axial Tilt: 0.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (34)

Outer Limit: 59,329,722 km

• M1: 149,448 km (0.075 R)
• M2: 255,214 km (0.107 R)
• M3: 379,829 km (0.097 R)
• M4: 524,041 km (0.1 R)
• M5: 602,730 km (0.119 R)
• M6: 686,355 km (0.071 R)
• M7: 764,894 km (0.044 R)
• M8: 843,582 km (0.047 R)
• M9: 953,088 km (0.107 R)
• M10: 1,031,477 km (0.064 R)
• M11: 1,112,260 km (0.069 R)
• M12: 1,199,027 km (0.106 R)
• M13: 1,316,012 km (0.098 R)
• M14: 1,424,770 km (0.078 R)
• M15: 1,536,669 km (0.11 R)
• M16: 1,613,114 km (0.102 R)
• M17: 1,703,770 km (0.075 R)
• M18: 1,805,198 km (0.089 R)
• M19: 1,904,231 km (0.052 R)
• M20: 2,019,122 km (0.052 R)
• M21: 2,098,559 km (0.086 R)
• M22: 2,270,297 km (0.112 R)
• M23: 2,367,835 km (0.097 R)
• M24: 2,526,858 km (0.118 R)
• M25: 2,653,717 km (0.077 R)
• M26: 2,798,228 km (0.106 R)
• M27: 2,892,475 km (0.102 R)
• M28: 2,966,675 km (0.118 R)
• M29: 3,203,938 km (0.097 R)
• M30: 3,291,752 km (0.049 R)
• M31: 3,436,263 km (0.093 R)
• M32: 3,656,920 km (0.061 R)
• M33: 3,771,961 km (0.099 R)
• M34: 3,964,493 km (0.027 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.07 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 230

Radius: 9.7

Gravity: 2.44 G

Time & Orbit

Eccentricity (e): 0.182

Orbit Range: 0.88 AU - 1.26 AU

Year: 726 Days

Day: 6.5 Hours

Environment

Temp: -169 °C

Axial Tilt: 4.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 59,329,722 km

• M1: 121,174 km (0.069 R)
• M2: 201,957 km (0.089 R)
• M3: 273,914 km (0.043 R)
• M4: 344,973 km (0.113 R)
• M5: 414,835 km (0.108 R)
• M6: 477,217 km (0.092 R)
• M7: 557,850 km (0.046 R)
• M8: 670,946 km (0.106 R)
• M9: 755,020 km (0.05 R)
• M10: 830,268 km (0.105 R)
• M11: 908,358 km (0.032 R)
• M12: 1,021,155 km (0.1 R)
• M13: 1,100,592 km (0.102 R)
• M14: 1,167,761 km (0.064 R)
• M15: 1,271,133 km (0.105 R)
• M16: 1,398,441 km (0.087 R)
• M17: 1,693,747 km (0.095 R)
• M18: 1,817,465 km (0.043 R)
• M19: 1,880,445 km (0.097 R)
• M20: 2,020,618 km (0.092 R)
• M21: 2,122,046 km (0.119 R)
• M22: 2,188,467 km (0.12 R)
• M23: 2,292,737 km (0.083 R)
• M24: 2,525,511 km (0.109 R)
• M25: 2,726,421 km (0.088 R)
• M26: 2,872,279 km (0.106 R)
• M27: 2,966,526 km (0.066 R)
• M28: 3,054,938 km (0.094 R)
• M29: 3,158,011 km (0.101 R)
• M30: 3,283,374 km (0.055 R)
• M31: 3,367,747 km (0.085 R)
• M32: 3,488,622 km (0.1 R)
• M33: 3,793,652 km (0.099 R)
• M34: 3,904,654 km (0.098 R)
• M35: 4,130,098 km (0.114 R)
• M36: 4,275,058 km (0.044 R)
• M37: 4,406,106 km (0.118 R)
• M38: 4,468,339 km (0.111 R)
• M39: 4,538,650 km (0.098 R)
• M40: 4,664,611 km (0.062 R)
• M41: 4,751,827 km (0.113 R)
• M42: 4,895,740 km (0.073 R)
• M43: 4,992,530 km (0.112 R)
• M44: 5,155,292 km (0.112 R)
• M45: 5,553,073 km (0.101 R)
• M46: 5,704,915 km (0.037 R)
• M47: 5,772,832 km (0.026 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 356.9

Radius: 9.7

Gravity: 3.79 G

Time & Orbit

Eccentricity (e): 0.056

Orbit Range: 1.71 AU - 1.91 AU

Year: 1597 Days

Day: 10.1 Hours

Environment

Temp: -176 °C

Axial Tilt: 13.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 59,329,722 km

• M1: 123,418 km (0.119 R)
• M2: 191,036 km (0.101 R)
• M3: 285,732 km (0.045 R)
• M4: 384,467 km (0.09 R)
• M5: 587,620 km (0.035 R)
• M6: 812,915 km (0.112 R)
• M7: 1,014,573 km (0.079 R)
• M8: 1,140,684 km (0.091 R)
• M9: 1,256,323 km (0.043 R)
• M10: 1,376,001 km (0.101 R)
• M11: 1,483,113 km (0.114 R)
• M12: 1,636,002 km (0.116 R)
• M13: 1,902,436 km (0.095 R)
• M14: 1,985,164 km (0.086 R)
• M15: 2,135,360 km (0.066 R)
• M16: 2,299,020 km (0.117 R)
• M17: 2,628,734 km (0.111 R)
• M18: 2,710,863 km (0.116 R)
• M19: 2,867,492 km (0.102 R)
• M20: 2,930,921 km (0.049 R)
• M21: 3,156,814 km (0.099 R)
• M22: 3,233,408 km (0.115 R)
• M23: 3,856,783 km (0.111 R)
• M24: 3,927,094 km (0.113 R)
• M25: 4,272,814 km (0.09 R)
• M26: 4,603,575 km (0.08 R)
• M27: 4,753,323 km (0.117 R)
• M28: 5,083,186 km (0.088 R)
• M29: 5,173,394 km (0.117 R)
• M30: 5,263,900 km (0.118 R)
• M31: 5,499,517 km (0.088 R)
• M32: 5,645,225 km (0.061 R)
• M33: 5,886,377 km (0.1 R)
• M34: 5,967,459 km (0.115 R)
• M35: 6,035,376 km (0.057 R)
• M36: 6,144,583 km (0.063 R)
• M37: 6,282,063 km (0.081 R)
• M38: 6,644,090 km (0.12 R)
• M39: 6,841,859 km (0.098 R)
• M40: 7,272,401 km (0.101 R)
• M41: 7,344,956 km (0.12 R)
• M42: 7,432,471 km (0.115 R)
• M43: 7,578,927 km (0.095 R)
• M44: 7,919,711 km (0.111 R)
• M45: 8,009,320 km (0.096 R)
• M46: 8,371,497 km (0.095 R)
• M47: 8,615,940 km (0.11 R)
• M48: 8,940,418 km (0.109 R)
• M49: 9,080,740 km (0.094 R)
• M50: 9,969,950 km (0.069 R)
• M51: 10,229,203 km (0.096 R)
• M52: 10,310,584 km (0.057 R)
• M53: 10,605,741 km (0.089 R)
• M54: 10,870,230 km (0.06 R)
• M55: 11,170,623 km (0.07 R)
• M56: 11,304,961 km (0.107 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 369

Radius: 14

Gravity: 1.88 G

Time & Orbit

Eccentricity (e): 0.232

Orbit Range: 1.65 AU - 2.65 AU

Year: 2068 Days

Day: 12.1 Hours

Environment

Temp: -192 °C

Axial Tilt: 14.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (43)

Outer Limit: 59,329,722 km

• M1: 203,902 km (0.1 R)
• M2: 315,652 km (0.055 R)
• M3: 501,901 km (0.115 R)
• M4: 678,875 km (0.075 R)
• M5: 879,486 km (0.057 R)
• M6: 972,087 km (0.058 R)
• M7: 1,193,791 km (0.091 R)
• M8: 1,479,224 km (0.064 R)
• M9: 1,573,022 km (0.086 R)
• M10: 1,887,626 km (0.086 R)
• M11: 2,011,044 km (0.117 R)
• M12: 2,105,291 km (0.094 R)
• M13: 2,255,188 km (0.088 R)
• M14: 2,353,474 km (0.058 R)
• M15: 2,796,583 km (0.088 R)
• M16: 2,998,091 km (0.12 R)
• M17: 3,155,617 km (0.118 R)
• M18: 3,353,236 km (0.071 R)
• M19: 3,580,475 km (0.094 R)
• M20: 4,104,068 km (0.06 R)
• M21: 4,252,319 km (0.079 R)
• M22: 4,708,144 km (0.098 R)
• M23: 4,835,153 km (0.112 R)
• M24: 5,325,535 km (0.105 R)
• M25: 5,968,656 km (0.081 R)
• M26: 6,060,359 km (0.109 R)
• M27: 6,183,478 km (0.057 R)
• M28: 6,479,084 km (0.087 R)
• M29: 6,827,348 km (0.12 R)
• M30: 7,214,208 km (0.074 R)
• M31: 7,641,459 km (0.105 R)
• M32: 7,841,472 km (0.067 R)
• M33: 8,972,431 km (0.065 R)
• M34: 9,718,775 km (0.111 R)
• M35: 9,881,388 km (0.086 R)
• M36: 10,411,264 km (0.097 R)
• M37: 10,763,417 km (0.109 R)
• M38: 11,195,157 km (0.115 R)
• M39: 12,133,734 km (0.115 R)
• M40: 12,681,411 km (0.053 R)
• M41: 12,780,146 km (0.097 R)
• M42: 13,437,778 km (0.099 R)
• M43: 13,538,308 km (0.089 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 494.6

Radius: 13.2

Gravity: 2.84 G

Time & Orbit

Eccentricity (e): 0.129

Orbit Range: 2.99 AU - 3.87 AU

Year: 4167 Days

Day: 13.9 Hours

Environment

Temp: -211 °C

Axial Tilt: 12.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 59,329,722 km

• M1: 203,603 km (0.098 R)
• M2: 326,871 km (0.048 R)
• M3: 471,532 km (0.11 R)
• M4: 796,758 km (0.099 R)
• M5: 895,194 km (0.097 R)
• M6: 1,242,560 km (0.075 R)
• M7: 1,548,338 km (0.068 R)
• M8: 1,674,898 km (0.068 R)
• M9: 1,819,559 km (0.107 R)
• M10: 1,938,489 km (0.115 R)
• M11: 2,707,123 km (0.111 R)
• M12: 3,124,651 km (0.116 R)
• M13: 3,451,522 km (0.079 R)
• M14: 3,581,523 km (0.069 R)
• M15: 4,846,373 km (0.051 R)
• M16: 4,929,699 km (0.09 R)
• M17: 5,246,697 km (0.1 R)
• M18: 5,505,052 km (0.049 R)
• M19: 6,124,387 km (0.105 R)
• M20: 6,626,587 km (0.12 R)
• M21: 6,742,526 km (0.075 R)
• M22: 6,976,646 km (0.057 R)
• M23: 7,165,888 km (0.076 R)
• M24: 7,428,881 km (0.09 R)
• M25: 7,695,165 km (0.062 R)
• M26: 8,013,808 km (0.086 R)
• M27: 8,162,359 km (0.063 R)
• M28: 8,261,991 km (0.04 R)
• M29: 8,765,837 km (0.07 R)
• M30: 10,149,318 km (0.113 R)
• M31: 10,444,923 km (0.085 R)
• M32: 10,989,759 km (0.118 R)
• M33: 11,293,442 km (0.108 R)
• M34: 11,376,768 km (0.087 R)
• M35: 11,544,019 km (0.094 R)
• M36: 11,824,515 km (0.118 R)
• M37: 11,965,586 km (0.049 R)
• M38: 12,164,102 km (0.078 R)
• M39: 12,392,239 km (0.052 R)
• M40: 12,708,339 km (0.073 R)
• M41: 12,910,895 km (0.11 R)
• M42: 13,525,143 km (0.066 R)
• M43: 13,643,176 km (0.072 R)
• M44: 14,630,223 km (0.053 R)
• M45: 14,933,907 km (0.076 R)
• M46: 15,025,461 km (0.113 R)
• M47: 15,455,106 km (0.113 R)
• M48: 15,733,358 km (0.108 R)
• M49: 16,200,851 km (0.095 R)
• M50: 16,799,691 km (0.096 R)
• M51: 17,341,535 km (0.085 R)
• M52: 17,502,053 km (0.116 R)
• M53: 17,824,437 km (0.066 R)
• M54: 18,083,839 km (0.074 R)
• M55: 18,246,602 km (0.114 R)
• M56: 18,639,296 km (0.088 R)
• M57: 19,733,306 km (0.06 R)
• M58: 20,203,791 km (0.113 R)
• M59: 20,338,878 km (0.119 R)
• M60: 20,575,990 km (0.119 R)
• M61: 20,848,258 km (0.07 R)
• M62: 21,568,273 km (0.118 R)
• M63: 22,226,803 km (0.102 R)
• M64: 22,366,378 km (0.038 R)
• M65: 22,506,102 km (0.093 R)
• M66: 22,611,120 km (0.069 R)
• M67: 22,962,376 km (0.066 R)
• M68: 23,884,198 km (0.077 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.79 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 781.5

Radius: 9.1

Gravity: 9.44 G

Time & Orbit

Eccentricity (e): 0.022

Orbit Range: 3.71 AU - 3.87 AU

Year: 4840 Days

Day: 9.9 Hours

Environment

Temp: -218 °C

Axial Tilt: 44.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 59,329,722 km

• M1: 124,017 km (0.081 R)
• M2: 193,729 km (0.097 R)
• M3: 273,016 km (0.112 R)
• M4: 341,083 km (0.066 R)
• M5: 406,906 km (0.117 R)
• M6: 477,965 km (0.094 R)
• M7: 783,294 km (0.096 R)
• M8: 1,408,015 km (0.11 R)
• M9: 1,588,580 km (0.053 R)
• M10: 1,673,103 km (0.066 R)
• M11: 1,811,780 km (0.108 R)
• M12: 2,045,152 km (0.084 R)
• M13: 2,119,054 km (0.1 R)
• M14: 2,307,547 km (0.082 R)
• M15: 2,365,292 km (0.086 R)
• M16: 2,640,851 km (0.081 R)
• M17: 2,885,294 km (0.093 R)
• M18: 3,115,974 km (0.105 R)
• M19: 3,775,401 km (0.108 R)
• M20: 4,074,448 km (0.119 R)
• M21: 4,309,765 km (0.059 R)
• M22: 4,381,273 km (0.118 R)
• M23: 4,793,714 km (0.096 R)
• M24: 5,067,329 km (0.092 R)
• M25: 5,812,924 km (0.111 R)
• M26: 5,945,019 km (0.083 R)
• M27: 6,265,907 km (0.115 R)
• M28: 6,510,350 km (0.104 R)
• M29: 6,785,759 km (0.051 R)
• M30: 7,036,785 km (0.116 R)
• M31: 7,121,158 km (0.06 R)
• M32: 7,290,951 km (0.098 R)
• M33: 7,750,217 km (0.078 R)
• M34: 8,969,589 km (0.101 R)
• M35: 9,554,816 km (0.081 R)
• M36: 9,710,847 km (0.104 R)
• M37: 11,185,882 km (0.102 R)
• M38: 11,251,705 km (0.1 R)
• M39: 11,915,919 km (0.091 R)
• M40: 12,388,349 km (0.098 R)
• M41: 12,456,416 km (0.07 R)
• M42: 12,832,655 km (0.079 R)
• M43: 13,039,549 km (0.045 R)
• M44: 13,351,760 km (0.065 R)
• M45: 14,267,897 km (0.048 R)
• M46: 14,482,121 km (0.05 R)
• M47: 14,697,542 km (0.062 R)
• M48: 14,950,063 km (0.07 R)
• M49: 15,167,728 km (0.03 R)
• M50: 15,790,055 km (0.048 R)
• M51: 16,085,960 km (0.108 R)
• M52: 16,160,160 km (0.033 R)
• M53: 16,234,511 km (0.108 R)
• M54: 17,135,539 km (0.095 R)
• M55: 17,325,378 km (0.11 R)
• M56: 17,822,043 km (0.064 R)
• M57: 18,091,319 km (0.096 R)
• M58: 18,595,165 km (0.11 R)
• M59: 18,946,720 km (0.051 R)
• M60: 19,064,453 km (0.093 R)
• M61: 19,934,814 km (0.076 R)
• M62: 20,898,972 km (0.035 R)
• M63: 21,183,058 km (0.081 R)
• M64: 22,332,120 km (0.073 R)
• M65: 22,914,355 km (0.025 R)
• M66: 23,333,229 km (0.117 R)
• M67: 23,712,310 km (0.067 R)
• M68: 23,839,169 km (0.057 R)
• M69: 23,923,841 km (0.076 R)
• M70: 24,093,485 km (0.077 R)
• M71: 25,076,941 km (0.047 R)
• M72: 25,465,298 km (0.067 R)
• M73: 25,551,765 km (0.079 R)
• M74: 26,730,148 km (0.116 R)
• M75: 27,303,855 km (0.108 R)
• M76: 28,060,073 km (0.082 R)
• M77: 28,149,532 km (0.101 R)
• M78: 28,283,871 km (0.104 R)
• M79: 28,508,268 km (0.112 R)
• M80: 30,049,425 km (0.117 R)
• M81: 30,738,024 km (0.096 R)

Planet 7 - Ice Giant

Semi-Major Axis: 7.17 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 818.9

Radius: 6.3

Gravity: 20.63 G

Time & Orbit

Eccentricity (e): 0.115

Orbit Range: 6.35 AU - 7.99 AU

Year: 12595 Days

Day: 16.2 Hours

Environment

Temp: -230 °C

Axial Tilt: 31.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 59,329,722 km

• M1: 93,349 km (0.084 R)
• M2: 156,180 km (0.11 R)
• M3: 433,535 km (0.056 R)
• M4: 570,267 km (0.047 R)
• M5: 682,017 km (0.047 R)
• M6: 760,705 km (0.099 R)
• M7: 1,369,120 km (0.067 R)
• M8: 1,495,231 km (0.099 R)
• M9: 1,758,822 km (0.062 R)
• M10: 2,094,370 km (0.103 R)
• M11: 2,269,549 km (0.064 R)
• M12: 2,728,366 km (0.091 R)
• M13: 2,984,777 km (0.105 R)
• M14: 3,349,945 km (0.101 R)
• M15: 3,694,020 km (0.112 R)
• M16: 4,085,667 km (0.115 R)
• M17: 4,194,874 km (0.074 R)
• M18: 4,528,028 km (0.069 R)
• M19: 4,716,821 km (0.113 R)
• M20: 6,067,839 km (0.114 R)
• M21: 6,317,967 km (0.111 R)
• M22: 6,571,386 km (0.089 R)
• M23: 7,484,830 km (0.105 R)
• M24: 7,708,030 km (0.086 R)
• M25: 8,115,535 km (0.047 R)
• M26: 8,345,018 km (0.086 R)
• M27: 8,576,446 km (0.108 R)
• M28: 8,669,645 km (0.117 R)
• M29: 8,763,294 km (0.114 R)
• M30: 9,236,023 km (0.033 R)
• M31: 10,009,743 km (0.06 R)
• M32: 10,157,097 km (0.106 R)
• M33: 11,412,971 km (0.1 R)
• M34: 11,721,592 km (0.089 R)
• M35: 12,189,683 km (0.09 R)
• M36: 12,347,060 km (0.103 R)
• M37: 13,413,543 km (0.096 R)
• M38: 13,576,156 km (0.119 R)
• M39: 13,739,218 km (0.102 R)
• M40: 14,067,585 km (0.116 R)
• M41: 14,232,741 km (0.093 R)
• M42: 15,236,842 km (0.057 R)
• M43: 16,843,823 km (0.106 R)
• M44: 17,136,286 km (0.073 R)
• M45: 17,607,969 km (0.098 R)
• M46: 17,726,600 km (0.117 R)
• M47: 19,414,363 km (0.045 R)
• M48: 19,782,673 km (0.112 R)
• M49: 20,526,174 km (0.059 R)
• M50: 20,901,366 km (0.109 R)
• M51: 21,089,709 km (0.077 R)
• M52: 21,912,797 km (0.064 R)
• M53: 23,590,387 km (0.045 R)
• M54: 23,721,136 km (0.074 R)
• M55: 24,642,958 km (0.108 R)
• M56: 25,241,798 km (0.035 R)
• M57: 25,576,598 km (0.118 R)
• M58: 25,643,768 km (0.095 R)
• M59: 28,515,748 km (0.026 R)
• M60: 28,934,173 km (0.079 R)
• M61: 29,565,775 km (0.087 R)
• M62: 29,989,436 km (0.039 R)
• M63: 30,202,015 km (0.071 R)
• M64: 31,559,765 km (0.025 R)
• M65: 34,334,357 km (0.111 R)
• M66: 35,301,507 km (0.118 R)
• M67: 35,750,750 km (0.087 R)
• M68: 37,567,017 km (0.102 R)
• M69: 37,796,052 km (0.06 R)
• M70: 38,025,684 km (0.12 R)
• M71: 38,179,022 km (0.119 R)
• M72: 38,255,766 km (0.055 R)
• M73: 39,413,055 km (0.072 R)
• M74: 39,645,829 km (0.081 R)
• M75: 39,879,052 km (0.12 R)
• M76: 41,288,414 km (0.066 R)
• M77: 43,112,760 km (0.077 R)
• M78: 43,352,565 km (0.074 R)
• M79: 43,673,154 km (0.106 R)
• M80: 46,184,004 km (0.079 R)
• M81: 46,347,515 km (0.116 R)
• M82: 47,250,787 km (0.118 R)
• M83: 47,580,650 km (0.112 R)
• M84: 48,159,743 km (0.103 R)
• M85: 48,325,647 km (0.1 R)
• M86: 50,921,170 km (0.091 R)
• M87: 52,875,966 km (0.119 R)
• M88: 54,077,835 km (0.088 R)
• M89: 54,941,912 km (0.097 R)
• M90: 55,028,530 km (0.097 R)
• M91: 55,984,610 km (0.051 R)
• M92: 56,421,136 km (0.088 R)
• M93: 57,385,294 km (0.117 R)
• M94: 58,178,014 km (0.062 R)
• M95: 59,240,906 km (0.068 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: 305 - 19,847 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit