🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.87 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 524.4

Radius: 10.7

Gravity: 4.58 G

Time & Orbit

Eccentricity (e): 0.031

Orbit Range: 0.84 AU - 0.9 AU

Year: 524 Days

Day: 5.7 Hours

Environment

Temp: -144 °C

Axial Tilt: 23.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 76,517,646 km

• M1: 134,638 km (0.107 R)
• M2: 284,535 km (0.107 R)
• M3: 367,263 km (0.114 R)
• M4: 457,919 km (0.112 R)
• M5: 550,371 km (0.093 R)
• M6: 626,665 km (0.084 R)
• M7: 782,696 km (0.067 R)
• M8: 883,974 km (0.083 R)
• M9: 952,490 km (0.107 R)
• M10: 1,042,248 km (0.106 R)
• M11: 1,159,832 km (0.116 R)
• M12: 1,230,592 km (0.097 R)
• M13: 1,318,705 km (0.104 R)
• M14: 1,430,455 km (0.112 R)
• M15: 1,523,505 km (0.053 R)
• M16: 1,596,060 km (0.078 R)
• M17: 1,785,600 km (0.068 R)
• M18: 1,940,284 km (0.078 R)
• M19: 2,007,155 km (0.061 R)
• M20: 2,275,832 km (0.06 R)
• M21: 2,457,295 km (0.086 R)
• M22: 2,563,210 km (0.115 R)
• M23: 2,650,276 km (0.066 R)
• M24: 2,724,776 km (0.096 R)
• M25: 2,876,019 km (0.09 R)
• M26: 3,115,226 km (0.06 R)
• M27: 3,302,672 km (0.114 R)
• M28: 3,696,264 km (0.098 R)
• M29: 3,972,272 km (0.094 R)
• M30: 4,073,700 km (0.033 R)
• M31: 4,191,583 km (0.052 R)
• M32: 4,407,004 km (0.077 R)
• M33: 4,487,637 km (0.057 R)
• M34: 4,617,787 km (0.096 R)
• M35: 4,724,450 km (0.045 R)
• M36: 4,856,994 km (0.118 R)
• M37: 4,998,962 km (0.091 R)
• M38: 5,125,522 km (0.113 R)
• M39: 5,270,183 km (0.06 R)
• M40: 5,338,849 km (0.111 R)
• M41: 5,407,664 km (0.112 R)
• M42: 5,528,988 km (0.099 R)
• M43: 5,659,886 km (0.075 R)
• M44: 5,783,005 km (0.091 R)
• M45: 5,871,567 km (0.108 R)
• M46: 5,996,182 km (0.045 R)
• M47: 6,076,815 km (0.107 R)

Planet 2 - Gas Giant

Semi-Major Axis: 3.03 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 585

Radius: 9.6

Gravity: 6.35 G

Time & Orbit

Eccentricity (e): 0.023

Orbit Range: 2.96 AU - 3.1 AU

Year: 3405 Days

Day: 5.9 Hours

Environment

Temp: -208 °C

Axial Tilt: 28.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 76,517,646 km

• M1: 135,236 km (0.088 R)
• M2: 322,982 km (0.041 R)
• M3: 468,241 km (0.116 R)
• M4: 536,757 km (0.1 R)
• M5: 796,160 km (0.117 R)
• M6: 859,141 km (0.11 R)
• M7: 924,066 km (0.091 R)
• M8: 1,002,156 km (0.081 R)
• M9: 1,070,971 km (0.1 R)
• M10: 1,177,186 km (0.112 R)
• M11: 1,400,834 km (0.098 R)
• M12: 1,557,613 km (0.096 R)
• M13: 1,665,473 km (0.086 R)
• M14: 1,734,139 km (0.098 R)
• M15: 1,846,187 km (0.118 R)
• M16: 1,989,652 km (0.053 R)
• M17: 2,505,016 km (0.042 R)
• M18: 2,600,161 km (0.096 R)
• M19: 3,352,638 km (0.025 R)
• M20: 3,653,629 km (0.104 R)
• M21: 3,834,792 km (0.098 R)
• M22: 3,981,996 km (0.085 R)
• M23: 4,074,896 km (0.08 R)
• M24: 4,206,243 km (0.077 R)
• M25: 4,281,940 km (0.055 R)
• M26: 4,358,085 km (0.111 R)
• M27: 4,550,468 km (0.069 R)
• M28: 4,864,025 km (0.06 R)
• M29: 5,043,543 km (0.062 R)
• M30: 5,306,835 km (0.054 R)
• M31: 5,616,203 km (0.096 R)
• M32: 6,016,378 km (0.066 R)
• M33: 6,274,135 km (0.1 R)
• M34: 6,404,285 km (0.092 R)
• M35: 6,557,323 km (0.056 R)
• M36: 6,934,011 km (0.095 R)
• M37: 7,317,729 km (0.078 R)
• M38: 7,941,403 km (0.106 R)
• M39: 8,176,720 km (0.053 R)
• M40: 8,271,565 km (0.107 R)
• M41: 8,342,924 km (0.096 R)
• M42: 8,799,496 km (0.107 R)
• M43: 8,969,739 km (0.117 R)
• M44: 9,043,042 km (0.093 R)
• M45: 9,116,644 km (0.092 R)
• M46: 9,512,031 km (0.09 R)
• M47: 9,686,761 km (0.054 R)
• M48: 9,812,274 km (0.057 R)
• M49: 9,963,667 km (0.119 R)
• M50: 10,166,671 km (0.064 R)
• M51: 10,473,646 km (0.103 R)
• M52: 10,887,733 km (0.104 R)
• M53: 11,254,547 km (0.079 R)
• M54: 11,386,492 km (0.098 R)
• M55: 12,081,225 km (0.045 R)
• M56: 12,216,312 km (0.081 R)
• M57: 12,597,487 km (0.037 R)
• M58: 13,287,732 km (0.05 R)
• M59: 13,679,678 km (0.026 R)
• M60: 13,764,201 km (0.042 R)
• M61: 13,877,147 km (0.108 R)
• M62: 14,303,352 km (0.108 R)
• M63: 14,503,813 km (0.04 R)
• M64: 14,936,300 km (0.051 R)
• M65: 15,197,797 km (0.076 R)
• M66: 15,431,619 km (0.114 R)
• M67: 15,637,166 km (0.099 R)
• M68: 15,813,991 km (0.109 R)
• M69: 15,991,564 km (0.048 R)
• M70: 16,080,574 km (0.052 R)
• M71: 16,438,412 km (0.114 R)
• M72: 16,618,229 km (0.116 R)
• M73: 17,101,131 km (0.112 R)
• M74: 17,161,868 km (0.095 R)
• M75: 18,328,432 km (0.089 R)
• M76: 19,046,950 km (0.082 R)
• M77: 19,457,148 km (0.065 R)
• M78: 20,382,710 km (0.037 R)
• M79: 20,996,959 km (0.088 R)
• M80: 21,192,184 km (0.1 R)
• M81: 21,290,021 km (0.099 R)
• M82: 22,011,980 km (0.078 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 468.4

Radius: 12.9

Gravity: 2.81 G

Time & Orbit

Eccentricity (e): 0.208

Orbit Range: 2.94 AU - 4.48 AU

Year: 4614 Days

Day: 5.5 Hours

Environment

Temp: -215 °C

Axial Tilt: 14.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 76,517,646 km

• M1: 169,345 km (0.068 R)
• M2: 290,669 km (0.036 R)
• M3: 407,654 km (0.112 R)
• M4: 614,548 km (0.077 R)
• M5: 695,780 km (0.079 R)
• M6: 825,631 km (0.106 R)
• M7: 1,348,326 km (0.096 R)
• M8: 1,430,904 km (0.056 R)
• M9: 1,586,934 km (0.116 R)
• M10: 1,689,409 km (0.098 R)
• M11: 1,932,057 km (0.085 R)
• M12: 2,154,060 km (0.064 R)
• M13: 2,268,203 km (0.117 R)
• M14: 2,537,180 km (0.098 R)
• M15: 2,640,702 km (0.096 R)
• M16: 3,014,696 km (0.119 R)
• M17: 3,329,899 km (0.098 R)
• M18: 3,734,262 km (0.095 R)
• M19: 3,932,330 km (0.108 R)
• M20: 4,032,859 km (0.097 R)
• M21: 4,464,000 km (0.06 R)
• M22: 4,759,755 km (0.07 R)
• M23: 5,105,626 km (0.11 R)
• M24: 5,370,564 km (0.093 R)
• M25: 5,617,400 km (0.115 R)
• M26: 6,286,103 km (0.12 R)
• M27: 6,427,622 km (0.116 R)
• M28: 6,546,403 km (0.069 R)
• M29: 7,004,472 km (0.079 R)
• M30: 7,175,911 km (0.103 R)
• M31: 7,423,196 km (0.098 R)
• M32: 7,572,943 km (0.112 R)
• M33: 8,310,910 km (0.026 R)
• M34: 8,440,461 km (0.042 R)
• M35: 8,675,330 km (0.093 R)
• M36: 9,098,393 km (0.066 R)
• M37: 9,366,323 km (0.087 R)
• M38: 9,447,106 km (0.068 R)
• M39: 9,827,683 km (0.091 R)
• M40: 10,324,347 km (0.089 R)
• M41: 10,491,598 km (0.047 R)
• M42: 10,575,672 km (0.069 R)
• M43: 11,170,174 km (0.119 R)
• M44: 11,284,766 km (0.068 R)
• M45: 11,572,592 km (0.071 R)
• M46: 12,451,031 km (0.072 R)
• M47: 12,629,351 km (0.091 R)
• M48: 12,838,340 km (0.079 R)
• M49: 12,988,386 km (0.096 R)
• M50: 13,472,485 km (0.068 R)
• M51: 13,839,299 km (0.057 R)
• M52: 13,962,418 km (0.108 R)
• M53: 14,427,069 km (0.081 R)
• M54: 14,677,047 km (0.109 R)
• M55: 15,755,199 km (0.112 R)
• M56: 16,531,612 km (0.065 R)
• M57: 16,858,782 km (0.11 R)
• M58: 17,254,319 km (0.052 R)
• M59: 17,552,917 km (0.068 R)
• M60: 17,652,848 km (0.11 R)
• M61: 17,920,179 km (0.1 R)
• M62: 18,054,518 km (0.099 R)
• M63: 18,832,577 km (0.094 R)
• M64: 20,316,737 km (0.106 R)
• M65: 20,667,245 km (0.057 R)
• M66: 21,552,416 km (0.108 R)
• M67: 21,909,955 km (0.114 R)
• M68: 22,305,491 km (0.113 R)
• M69: 23,067,244 km (0.069 R)
• M70: 23,800,572 km (0.118 R)
• M71: 24,059,078 km (0.085 R)
• M72: 25,215,020 km (0.059 R)

Planet 4 - Ice Giant

Semi-Major Axis: 7.46 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 16.2

Radius: 6.6

Gravity: 0.37 G

Time & Orbit

Eccentricity (e): 0.217

Orbit Range: 5.84 AU - 9.08 AU

Year: 13156 Days

Day: 18.5 Hours

Environment

Temp: -233 °C

Axial Tilt: 34.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 76,517,646 km

• M1: 311,612 km (0.06 R)
• M2: 406,308 km (0.073 R)
• M3: 1,008,439 km (0.073 R)
• M4: 2,248,606 km (0.118 R)
• M5: 2,662,393 km (0.099 R)
• M6: 2,782,969 km (0.112 R)
• M7: 3,029,656 km (0.083 R)
• M8: 3,355,181 km (0.111 R)
• M9: 3,412,926 km (0.113 R)
• M10: 3,514,802 km (0.111 R)
• M11: 3,662,156 km (0.078 R)
• M12: 3,962,848 km (0.104 R)
• M13: 4,039,292 km (0.072 R)
• M14: 4,256,059 km (0.097 R)
• M15: 4,302,884 km (0.057 R)
• M16: 4,508,281 km (0.063 R)
• M17: 4,620,181 km (0.108 R)
• M18: 4,716,821 km (0.069 R)
• M19: 5,143,474 km (0.094 R)
• M20: 5,193,589 km (0.099 R)
• M21: 6,051,084 km (0.105 R)
• M22: 6,227,909 km (0.059 R)
• M23: 6,442,283 km (0.099 R)
• M24: 6,804,908 km (0.098 R)
• M25: 6,915,012 km (0.119 R)
• M26: 7,007,314 km (0.074 R)
• M27: 7,286,314 km (0.118 R)
• M28: 7,664,198 km (0.081 R)
• M29: 7,778,790 km (0.118 R)
• M30: 8,087,111 km (0.116 R)
• M31: 8,164,902 km (0.102 R)
• M32: 8,301,485 km (0.065 R)
• M33: 8,458,563 km (0.103 R)
• M34: 8,596,791 km (0.072 R)
• M35: 8,755,664 km (0.097 R)
• M36: 9,015,964 km (0.085 R)
• M37: 9,319,499 km (0.093 R)
• M38: 9,482,710 km (0.092 R)
• M39: 9,585,184 km (0.027 R)
• M40: 10,103,242 km (0.054 R)
• M41: 10,271,091 km (0.061 R)
• M42: 10,313,128 km (0.086 R)
• M43: 10,972,555 km (0.117 R)
• M44: 11,231,509 km (0.112 R)
• M45: 11,645,596 km (0.118 R)
• M46: 11,733,410 km (0.116 R)
• M47: 12,714,024 km (0.107 R)
• M48: 12,759,202 km (0.114 R)
• M49: 15,158,004 km (0.069 R)
• M50: 16,053,048 km (0.119 R)
• M51: 16,199,804 km (0.07 R)

Planet 5 - Ice Giant

Semi-Major Axis: 8.09 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 341.1

Radius: 8

Gravity: 5.33 G

Time & Orbit

Eccentricity (e): 0.238

Orbit Range: 6.16 AU - 10.02 AU

Year: 14857 Days

Day: 15.3 Hours

Environment

Temp: -222 °C

Axial Tilt: 23.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 76,517,646 km

• M1: 148,850 km (0.035 R)
• M2: 199,414 km (0.105 R)
• M3: 382,073 km (0.093 R)
• M4: 684,859 km (0.079 R)
• M5: 736,321 km (0.115 R)
• M6: 898,784 km (0.075 R)
• M7: 1,154,297 km (0.075 R)
• M8: 2,360,355 km (0.098 R)
• M9: 2,413,462 km (0.082 R)
• M10: 2,521,173 km (0.103 R)
• M11: 2,881,853 km (0.111 R)
• M12: 2,938,850 km (0.097 R)
• M13: 2,996,296 km (0.081 R)
• M14: 3,996,058 km (0.086 R)
• M15: 4,416,129 km (0.111 R)
• M16: 4,515,163 km (0.099 R)
• M17: 5,298,308 km (0.109 R)
• M18: 5,509,540 km (0.093 R)
• M19: 6,196,643 km (0.09 R)
• M20: 6,569,142 km (0.08 R)
• M21: 6,644,539 km (0.09 R)
• M22: 7,335,831 km (0.109 R)
• M23: 7,453,265 km (0.086 R)
• M24: 7,610,792 km (0.119 R)
• M25: 8,456,169 km (0.079 R)
• M26: 8,703,155 km (0.097 R)
• M27: 9,078,048 km (0.085 R)
• M28: 9,246,345 km (0.07 R)
• M29: 10,365,636 km (0.101 R)
• M30: 10,453,600 km (0.103 R)
• M31: 10,541,713 km (0.098 R)
• M32: 10,629,976 km (0.112 R)
• M33: 11,165,387 km (0.094 R)
• M34: 12,030,960 km (0.114 R)
• M35: 13,107,466 km (0.089 R)
• M36: 14,019,864 km (0.1 R)
• M37: 14,459,233 km (0.113 R)
• M38: 15,552,045 km (0.1 R)
• M39: 15,753,553 km (0.097 R)
• M40: 15,854,682 km (0.108 R)
• M41: 15,905,246 km (0.074 R)
• M42: 16,619,875 km (0.119 R)
• M43: 17,763,700 km (0.074 R)
• M44: 18,611,471 km (0.092 R)
• M45: 19,526,711 km (0.115 R)
• M46: 19,853,133 km (0.098 R)
• M47: 20,456,462 km (0.028 R)
• M48: 21,624,821 km (0.09 R)
• M49: 22,245,503 km (0.108 R)
• M50: 22,472,592 km (0.084 R)
• M51: 22,757,576 km (0.089 R)
• M52: 22,929,165 km (0.029 R)
• M53: 23,504,219 km (0.071 R)
• M54: 23,793,541 km (0.08 R)
• M55: 24,844,766 km (0.112 R)
• M56: 25,672,790 km (0.091 R)
• M57: 26,811,080 km (0.099 R)
• M58: 27,416,802 km (0.111 R)
• M59: 27,599,461 km (0.059 R)
• M60: 28,088,347 km (0.118 R)
• M61: 29,260,745 km (0.107 R)
• M62: 29,385,211 km (0.081 R)
• M63: 29,447,443 km (0.119 R)
• M64: 29,572,058 km (0.11 R)
• M65: 31,845,048 km (0.113 R)
• M66: 32,036,982 km (0.092 R)
• M67: 32,229,365 km (0.06 R)
• M68: 32,422,047 km (0.093 R)
• M69: 32,808,608 km (0.054 R)
• M70: 33,002,487 km (0.059 R)
• M71: 33,456,217 km (0.117 R)
• M72: 33,716,518 km (0.043 R)
• M73: 34,501,308 km (0.105 R)
• M74: 34,566,982 km (0.083 R)
• M75: 35,756,285 km (0.067 R)
• M76: 36,489,613 km (0.092 R)
• M77: 38,582,936 km (0.083 R)
• M78: 40,714,856 km (0.077 R)
• M79: 40,992,659 km (0.06 R)
• M80: 41,131,785 km (0.117 R)
• M81: 41,830,108 km (0.089 R)
• M82: 42,110,454 km (0.109 R)
• M83: 42,532,171 km (0.112 R)
• M84: 42,673,092 km (0.084 R)
• M85: 43,450,851 km (0.113 R)
• M86: 43,734,788 km (0.059 R)
• M87: 43,948,114 km (0.114 R)
• M88: 45,235,703 km (0.098 R)
• M89: 47,628,072 km (0.108 R)
• M90: 48,287,649 km (0.099 R)
• M91: 48,361,252 km (0.063 R)
• M92: 48,729,113 km (0.108 R)
• M93: 49,171,923 km (0.091 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.81 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 977.5

Radius: 5.5

Gravity: 32.31 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 8.19 AU - 9.43 AU

Year: 16884 Days

Day: 17.5 Hours

Environment

Temp: -230 °C

Axial Tilt: 47 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 76,517,646 km

• M1: 284,685 km (0.063 R)
• M2: 726,447 km (0.073 R)
• M3: 847,322 km (0.039 R)
• M4: 974,929 km (0.091 R)
• M5: 2,064,151 km (0.097 R)
• M6: 2,342,403 km (0.093 R)
• M7: 3,447,034 km (0.085 R)
• M8: 3,528,415 km (0.06 R)
• M9: 3,734,711 km (0.089 R)
• M10: 3,860,373 km (0.089 R)
• M11: 3,945,045 km (0.095 R)
• M12: 4,289,569 km (0.049 R)
• M13: 5,053,117 km (0.094 R)
• M14: 5,099,343 km (0.03 R)
• M15: 5,332,715 km (0.084 R)
• M16: 6,102,396 km (0.079 R)
• M17: 6,399,797 km (0.058 R)
• M18: 6,500,027 km (0.101 R)
• M19: 7,957,111 km (0.086 R)
• M20: 8,282,037 km (0.116 R)
• M21: 10,556,523 km (0.06 R)
• M22: 11,033,142 km (0.027 R)
• M23: 12,255,357 km (0.05 R)
• M24: 12,756,061 km (0.074 R)
• M25: 13,713,038 km (0.089 R)
• M26: 13,777,665 km (0.077 R)
• M27: 14,037,067 km (0.064 R)
• M28: 14,957,992 km (0.097 R)
• M29: 15,358,615 km (0.102 R)
• M30: 17,274,216 km (0.105 R)
• M31: 18,047,188 km (0.102 R)
• M32: 18,331,125 km (0.081 R)
• M33: 19,336,273 km (0.08 R)
• M34: 19,699,496 km (0.109 R)
• M35: 19,845,504 km (0.098 R)
• M36: 20,654,679 km (0.108 R)
• M37: 20,802,930 km (0.048 R)
• M38: 22,686,068 km (0.065 R)
• M39: 23,841,861 km (0.032 R)
• M40: 24,309,504 km (0.109 R)
• M41: 24,622,912 km (0.119 R)
• M42: 24,780,139 km (0.108 R)
• M43: 24,858,977 km (0.102 R)
• M44: 24,937,815 km (0.084 R)
• M45: 25,174,778 km (0.083 R)
• M46: 26,290,479 km (0.08 R)
• M47: 28,487,474 km (0.055 R)
• M48: 29,149,594 km (0.104 R)
• M49: 30,996,529 km (0.045 R)
• M50: 31,763,069 km (0.101 R)
• M51: 33,488,381 km (0.074 R)
• M52: 33,924,608 km (0.094 R)
• M53: 34,362,481 km (0.113 R)
• M54: 34,714,186 km (0.073 R)
• M55: 35,954,651 km (0.081 R)
• M56: 36,939,454 km (0.084 R)
• M57: 37,842,427 km (0.118 R)
• M58: 38,023,889 km (0.098 R)
• M59: 38,935,539 km (0.068 R)
• M60: 40,780,230 km (0.112 R)
• M61: 43,600,299 km (0.074 R)
• M62: 43,790,588 km (0.119 R)
• M63: 44,937,854 km (0.112 R)
• M64: 45,998,054 km (0.119 R)
• M65: 47,359,395 km (0.105 R)
• M66: 49,723,639 km (0.059 R)
• M67: 50,021,938 km (0.064 R)
• M68: 51,823,694 km (0.11 R)
• M69: 51,924,374 km (0.085 R)
• M70: 54,463,648 km (0.113 R)
• M71: 54,873,696 km (0.068 R)
• M72: 55,490,637 km (0.052 R)
• M73: 55,799,856 km (0.113 R)
• M74: 58,190,430 km (0.116 R)
• M75: 60,720,280 km (0.089 R)
• M76: 61,571,492 km (0.115 R)
• M77: 61,998,594 km (0.086 R)
• M78: 62,212,518 km (0.067 R)
• M79: 63,393,594 km (0.093 R)
• M80: 64,148,913 km (0.098 R)
• M81: 64,365,232 km (0.116 R)
• M82: 64,581,850 km (0.108 R)
• M83: 67,639,780 km (0.057 R)
• M84: 68,190,749 km (0.099 R)
• M85: 69,186,322 km (0.118 R)
• M86: 69,741,480 km (0.085 R)
• M87: 70,186,683 km (0.056 R)
• M88: 71,191,831 km (0.112 R)
• M89: 72,089,269 km (0.111 R)
• M90: 74,462,789 km (0.117 R)
• M91: 74,576,483 km (0.096 R)
• M92: 74,690,178 km (0.108 R)
• M93: 75,602,126 km (0.032 R)

Kuiper Belt

Range: 30 - 57 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 510 - 13,040 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit