🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.65 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.16

Radius: 1.36

Gravity: 1.17 G

Time & Orbit

Eccentricity (e): 0.24

Orbit Range: 0.49 AU - 0.81 AU

Year: 232 Days

Day: 35.8 Hours

Environment

Temp: 1 °C

Axial Tilt: 31.1 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (1)

Outer Limit: 47,377,076 km

• M1: 59,091 km (0.115 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.94 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.5

Radius: 0.76

Gravity: 0.87 G

Time & Orbit

Eccentricity (e): 0.068

Orbit Range: 0.88 AU - 1 AU

Year: 404 Days

Day: 42.5 Hours

Environment

Temp: -50 °C

Axial Tilt: 5.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 47,377,076 km

• M1: 36,651 km (0.082 R)
• M2: 336,146 km (0.104 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.45 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.8

Radius: 1.87

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.172

Orbit Range: 1.2 AU - 1.7 AU

Year: 773 Days

Day: 39.5 Hours

Environment

Temp: -94 °C

Axial Tilt: 31.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 1.7 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.63

Radius: 1.47

Gravity: 1.22 G

Time & Orbit

Eccentricity (e): 0.124

Orbit Range: 1.49 AU - 1.91 AU

Year: 982 Days

Day: 30.8 Hours

Environment

Temp: -107 °C

Axial Tilt: 11.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 1.9 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.89

Radius: 1.89

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.172

Orbit Range: 1.57 AU - 2.23 AU

Year: 1160 Days

Day: 22.6 Hours

Environment

Temp: -128 °C

Axial Tilt: 28.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 47,377,076 km

• M1: 1,936,096 km (0.119 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.61 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 917.5

Radius: 12.8

Gravity: 5.6 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 2.06 AU - 3.16 AU

Year: 1868 Days

Day: 7.2 Hours

Environment

Temp: -142 °C

Axial Tilt: 0.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 47,377,076 km

• M1: 222,751 km (0.079 R)
• M2: 423,212 km (0.078 R)
• M3: 531,820 km (0.091 R)
• M4: 667,954 km (0.112 R)
• M5: 843,732 km (0.078 R)
• M6: 1,055,114 km (0.086 R)
• M7: 1,284,747 km (0.09 R)
• M8: 1,422,077 km (0.117 R)
• M9: 1,735,186 km (0.079 R)
• M10: 1,912,160 km (0.116 R)
• M11: 2,021,366 km (0.109 R)
• M12: 2,220,780 km (0.099 R)
• M13: 2,335,821 km (0.098 R)
• M14: 2,802,866 km (0.12 R)
• M15: 3,140,059 km (0.119 R)
• M16: 3,610,245 km (0.082 R)
• M17: 3,700,902 km (0.041 R)
• M18: 4,245,288 km (0.09 R)
• M19: 4,357,188 km (0.106 R)
• M20: 4,437,821 km (0.073 R)
• M21: 4,567,672 km (0.064 R)
• M22: 4,748,536 km (0.119 R)
• M23: 4,998,962 km (0.074 R)
• M24: 5,134,349 km (0.092 R)
• M25: 5,288,135 km (0.062 R)
• M26: 5,670,507 km (0.091 R)
• M27: 5,776,423 km (0.104 R)
• M28: 6,026,101 km (0.116 R)
• M29: 6,170,314 km (0.08 R)
• M30: 6,480,729 km (0.054 R)
• M31: 7,003,275 km (0.065 R)
• M32: 7,116,969 km (0.063 R)
• M33: 7,423,346 km (0.058 R)
• M34: 7,695,015 km (0.065 R)
• M35: 8,610,704 km (0.048 R)
• M36: 8,855,296 km (0.082 R)
• M37: 8,978,415 km (0.111 R)
• M38: 9,060,844 km (0.099 R)
• M39: 9,226,449 km (0.111 R)
• M40: 9,372,157 km (0.065 R)
• M41: 9,455,782 km (0.102 R)
• M42: 9,602,687 km (0.102 R)
• M43: 9,814,069 km (0.069 R)
• M44: 9,898,891 km (0.093 R)
• M45: 10,348,881 km (0.077 R)
• M46: 10,543,808 km (0.093 R)
• M47: 10,805,604 km (0.11 R)
• M48: 10,937,400 km (0.031 R)
• M49: 11,158,056 km (0.081 R)
• M50: 11,536,689 km (0.11 R)
• M51: 12,260,892 km (0.112 R)
• M52: 12,767,281 km (0.112 R)
• M53: 12,953,081 km (0.064 R)
• M54: 13,116,442 km (0.103 R)
• M55: 13,304,038 km (0.1 R)
• M56: 13,445,258 km (0.036 R)
• M57: 13,658,136 km (0.082 R)
• M58: 13,824,489 km (0.11 R)
• M59: 13,943,718 km (0.118 R)
• M60: 14,183,075 km (0.078 R)
• M61: 14,472,248 km (0.118 R)
• M62: 15,130,029 km (0.111 R)
• M63: 15,400,802 km (0.082 R)
• M64: 15,722,886 km (0.069 R)
• M65: 16,197,560 km (0.059 R)
• M66: 16,550,461 km (0.051 R)
• M67: 16,651,739 km (0.073 R)
• M68: 16,804,030 km (0.103 R)
• M69: 16,931,337 km (0.104 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.42 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 338.5

Radius: 12

Gravity: 2.35 G

Time & Orbit

Eccentricity (e): 0.028

Orbit Range: 4.3 AU - 4.54 AU

Year: 4116 Days

Day: 9.4 Hours

Environment

Temp: -177 °C

Axial Tilt: 6.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 47,377,076 km

• M1: 154,535 km (0.052 R)
• M2: 241,601 km (0.106 R)
• M3: 368,160 km (0.059 R)
• M4: 702,063 km (0.112 R)
• M5: 817,552 km (0.076 R)
• M6: 929,601 km (0.079 R)
• M7: 1,125,126 km (0.101 R)
• M8: 1,216,530 km (0.098 R)
• M9: 1,298,809 km (0.087 R)
• M10: 1,519,316 km (0.078 R)
• M11: 1,887,177 km (0.11 R)
• M12: 2,312,185 km (0.118 R)
• M13: 2,430,666 km (0.026 R)
• M14: 3,184,490 km (0.097 R)
• M15: 3,366,999 km (0.114 R)
• M16: 3,485,032 km (0.049 R)
• M17: 3,587,357 km (0.079 R)
• M18: 3,953,273 km (0.085 R)
• M19: 4,240,352 km (0.045 R)
• M20: 4,515,761 km (0.093 R)
• M21: 4,702,609 km (0.117 R)
• M22: 4,797,005 km (0.083 R)
• M23: 4,968,444 km (0.04 R)
• M24: 5,103,382 km (0.084 R)
• M25: 5,239,366 km (0.038 R)
• M26: 5,455,685 km (0.111 R)
• M27: 5,594,960 km (0.104 R)
• M28: 5,937,988 km (0.095 R)
• M29: 6,184,226 km (0.073 R)
• M30: 6,644,539 km (0.11 R)
• M31: 6,793,389 km (0.114 R)
• M32: 6,878,959 km (0.067 R)
• M33: 7,181,296 km (0.089 R)
• M34: 7,312,194 km (0.097 R)
• M35: 7,598,525 km (0.058 R)
• M36: 7,956,064 km (0.109 R)
• M37: 8,364,915 km (0.12 R)
• M38: 8,479,656 km (0.11 R)
• M39: 8,710,785 km (0.103 R)
• M40: 8,920,671 km (0.117 R)
• M41: 9,037,955 km (0.077 R)
• M42: 9,393,101 km (0.102 R)
• M43: 9,632,308 km (0.111 R)
• M44: 9,970,698 km (0.079 R)
• M45: 10,165,774 km (0.07 R)
• M46: 10,263,910 km (0.047 R)
• M47: 10,362,196 km (0.115 R)
• M48: 10,460,930 km (0.115 R)
• M49: 11,109,886 km (0.046 R)
• M50: 11,236,296 km (0.066 R)
• M51: 13,001,401 km (0.112 R)
• M52: 13,563,740 km (0.104 R)
• M53: 13,725,904 km (0.059 R)
• M54: 13,970,347 km (0.076 R)
• M55: 14,052,177 km (0.112 R)
• M56: 14,243,662 km (0.052 R)
• M57: 14,934,804 km (0.085 R)
• M58: 15,186,278 km (0.116 R)
• M59: 16,120,218 km (0.081 R)
• M60: 16,349,551 km (0.059 R)
• M61: 16,435,720 km (0.106 R)
• M62: 18,103,138 km (0.113 R)
• M63: 18,640,792 km (0.098 R)
• M64: 19,244,420 km (0.096 R)
• M65: 19,854,480 km (0.082 R)
• M66: 20,100,269 km (0.119 R)
• M67: 20,347,106 km (0.104 R)
• M68: 20,470,973 km (0.077 R)
• M69: 20,594,989 km (0.112 R)
• M70: 20,688,189 km (0.112 R)

Planet 8 - Gas Giant

Semi-Major Axis: 5.45 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 946.9

Radius: 11.7

Gravity: 6.92 G

Time & Orbit

Eccentricity (e): 0.035

Orbit Range: 5.26 AU - 5.64 AU

Year: 5635 Days

Day: 11.8 Hours

Environment

Temp: -177 °C

Axial Tilt: 10.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 47,377,076 km

• M1: 193,131 km (0.085 R)
• M2: 306,526 km (0.042 R)
• M3: 503,546 km (0.042 R)
• M4: 639,232 km (0.085 R)
• M5: 875,896 km (0.119 R)
• M6: 981,960 km (0.042 R)
• M7: 1,060,649 km (0.093 R)
• M8: 1,208,003 km (0.088 R)
• M9: 1,292,974 km (0.117 R)
• M10: 1,542,055 km (0.079 R)
• M11: 1,634,955 km (0.117 R)
• M12: 1,729,800 km (0.097 R)
• M13: 2,005,659 km (0.066 R)
• M14: 2,402,691 km (0.063 R)
• M15: 2,666,432 km (0.084 R)
• M16: 3,079,622 km (0.095 R)
• M17: 3,439,704 km (0.117 R)
• M18: 3,712,421 km (0.035 R)
• M19: 3,838,681 km (0.101 R)
• M20: 4,095,691 km (0.105 R)
• M21: 4,279,097 km (0.115 R)
• M22: 4,572,609 km (0.109 R)
• M23: 5,011,529 km (0.113 R)
• M24: 5,095,303 km (0.076 R)
• M25: 5,179,677 km (0.084 R)
• M26: 5,435,339 km (0.068 R)
• M27: 5,812,027 km (0.118 R)
• M28: 5,959,231 km (0.108 R)
• M29: 6,077,862 km (0.11 R)
• M30: 6,621,501 km (0.042 R)
• M31: 6,899,304 km (0.092 R)
• M32: 7,820,229 km (0.081 R)
• M33: 8,311,807 km (0.112 R)
• M34: 9,084,929 km (0.098 R)
• M35: 9,462,813 km (0.079 R)
• M36: 9,775,922 km (0.099 R)
• M37: 10,376,557 km (0.099 R)
• M38: 10,735,592 km (0.101 R)
• M39: 11,025,662 km (0.053 R)
• M40: 11,135,168 km (0.114 R)
• M41: 11,208,321 km (0.084 R)
• M42: 11,836,932 km (0.11 R)
• M43: 12,249,822 km (0.08 R)
• M44: 12,820,388 km (0.109 R)
• M45: 12,935,578 km (0.086 R)
• M46: 14,066,538 km (0.078 R)
• M47: 14,423,927 km (0.111 R)
• M48: 15,147,832 km (0.073 R)
• M49: 15,229,063 km (0.083 R)
• M50: 15,432,516 km (0.099 R)
• M51: 15,514,197 km (0.039 R)
• M52: 16,297,342 km (0.088 R)
• M53: 16,422,256 km (0.079 R)
• M54: 17,347,369 km (0.034 R)
• M55: 18,159,985 km (0.089 R)
• M56: 18,289,387 km (0.109 R)
• M57: 18,505,855 km (0.1 R)
• M58: 19,468,218 km (0.101 R)
• M59: 20,089,199 km (0.114 R)
• M60: 20,402,008 km (0.112 R)
• M61: 21,807,031 km (0.074 R)
• M62: 22,730,050 km (0.109 R)
• M63: 22,823,100 km (0.079 R)
• M64: 23,289,995 km (0.099 R)
• M65: 23,807,304 km (0.07 R)
• M66: 25,429,992 km (0.067 R)
• M67: 25,623,273 km (0.107 R)
• M68: 25,720,063 km (0.072 R)
• M69: 26,989,700 km (0.088 R)
• M70: 28,079,820 km (0.116 R)
• M71: 28,179,751 km (0.111 R)
• M72: 28,429,729 km (0.098 R)
• M73: 28,530,109 km (0.107 R)
• M74: 28,680,605 km (0.105 R)
• M75: 29,894,741 km (0.108 R)
• M76: 30,764,952 km (0.097 R)
• M77: 32,059,721 km (0.041 R)
• M78: 33,372,293 km (0.051 R)
• M79: 33,530,867 km (0.051 R)
• M80: 33,795,954 km (0.027 R)
• M81: 34,863,036 km (0.105 R)
• M82: 35,024,003 km (0.039 R)
• M83: 35,131,564 km (0.112 R)
• M84: 36,375,470 km (0.068 R)

Planet 9 - Gas Giant

Semi-Major Axis: 7.51 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 507.7

Radius: 11.3

Gravity: 3.98 G

Time & Orbit

Eccentricity (e): 0.149

Orbit Range: 6.39 AU - 8.63 AU

Year: 9116 Days

Day: 14.7 Hours

Environment

Temp: -188 °C

Axial Tilt: 34 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 47,377,076 km

• M1: 164,258 km (0.117 R)
• M2: 246,986 km (0.055 R)
• M3: 341,233 km (0.099 R)
• M4: 925,712 km (0.108 R)
• M5: 1,293,124 km (0.103 R)
• M6: 1,387,371 km (0.12 R)
• M7: 1,704,817 km (0.098 R)
• M8: 1,851,124 km (0.12 R)
• M9: 2,178,893 km (0.057 R)
• M10: 2,889,333 km (0.088 R)
• M11: 3,039,679 km (0.118 R)
• M12: 3,559,681 km (0.105 R)
• M13: 3,830,304 km (0.091 R)
• M14: 4,079,534 km (0.093 R)
• M15: 4,334,299 km (0.088 R)
• M16: 4,829,618 km (0.084 R)
• M17: 5,038,905 km (0.076 R)
• M18: 5,747,550 km (0.095 R)
• M19: 6,553,284 km (0.078 R)
• M20: 6,818,671 km (0.084 R)
• M21: 7,223,333 km (0.11 R)
• M22: 8,628,057 km (0.112 R)
• M23: 8,700,612 km (0.046 R)
• M24: 9,436,185 km (0.118 R)
• M25: 10,191,654 km (0.112 R)
• M26: 10,537,973 km (0.111 R)
• M27: 12,572,953 km (0.033 R)
• M28: 12,737,511 km (0.119 R)
• M29: 12,985,993 km (0.057 R)
• M30: 13,910,208 km (0.103 R)
• M31: 15,556,383 km (0.093 R)
• M32: 15,733,208 km (0.074 R)
• M33: 16,357,480 km (0.052 R)
• M34: 16,582,475 km (0.073 R)
• M35: 16,808,368 km (0.035 R)
• M36: 17,126,413 km (0.108 R)
• M37: 17,217,668 km (0.086 R)
• M38: 17,354,849 km (0.1 R)
• M39: 17,446,403 km (0.117 R)
• M40: 17,630,259 km (0.058 R)
• M41: 17,722,411 km (0.112 R)
• M42: 18,465,164 km (0.08 R)
• M43: 18,652,461 km (0.119 R)
• M44: 19,123,545 km (0.082 R)
• M45: 19,981,339 km (0.073 R)
• M46: 20,802,930 km (0.093 R)
• M47: 20,948,938 km (0.094 R)
• M48: 21,193,381 km (0.068 R)
• M49: 21,340,435 km (0.101 R)
• M50: 21,734,177 km (0.111 R)
• M51: 21,931,945 km (0.116 R)
• M52: 22,629,072 km (0.094 R)
• M53: 22,729,152 km (0.034 R)
• M54: 23,383,942 km (0.117 R)
• M55: 23,840,814 km (0.111 R)
• M56: 24,147,041 km (0.078 R)
• M57: 24,351,990 km (0.088 R)
• M58: 24,918,368 km (0.081 R)
• M59: 25,385,113 km (0.093 R)
• M60: 26,274,472 km (0.06 R)
• M61: 26,538,064 km (0.118 R)
• M62: 28,407,140 km (0.109 R)
• M63: 28,677,762 km (0.063 R)
• M64: 29,330,308 km (0.092 R)
• M65: 29,549,020 km (0.09 R)
• M66: 29,768,181 km (0.086 R)
• M67: 30,429,104 km (0.089 R)
• M68: 31,541,215 km (0.107 R)
• M69: 31,877,361 km (0.109 R)
• M70: 31,989,709 km (0.033 R)
• M71: 33,690,637 km (0.078 R)
• M72: 33,862,376 km (0.108 R)
• M73: 34,206,600 km (0.084 R)
• M74: 34,783,151 km (0.097 R)
• M75: 36,414,067 km (0.113 R)
• M76: 36,649,085 km (0.11 R)
• M77: 38,010,276 km (0.074 R)
• M78: 38,248,735 km (0.107 R)
• M79: 38,667,160 km (0.076 R)
• M80: 39,931,561 km (0.112 R)

Planet 10 - Gas Giant

Semi-Major Axis: 8.85 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 486.4

Radius: 10.4

Gravity: 4.5 G

Time & Orbit

Eccentricity (e): 0.22

Orbit Range: 6.9 AU - 10.8 AU

Year: 11661 Days

Day: 8.6 Hours

Environment

Temp: -202 °C

Axial Tilt: 31.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 47,377,076 km

• M1: 338,989 km (0.076 R)
• M2: 493,224 km (0.042 R)
• M3: 626,217 km (0.088 R)
• M4: 705,803 km (0.117 R)
• M5: 806,482 km (0.078 R)
• M6: 967,150 km (0.097 R)
• M7: 1,099,844 km (0.037 R)
• M8: 1,426,416 km (0.12 R)
• M9: 1,759,869 km (0.104 R)
• M10: 2,343,899 km (0.101 R)
• M11: 2,421,092 km (0.038 R)
• M12: 2,525,212 km (0.096 R)
• M13: 2,765,167 km (0.113 R)
• M14: 2,874,224 km (0.116 R)
• M15: 3,210,071 km (0.073 R)
• M16: 3,828,060 km (0.078 R)
• M17: 4,579,041 km (0.096 R)
• M18: 4,741,355 km (0.048 R)
• M19: 5,071,368 km (0.096 R)
• M20: 5,171,898 km (0.079 R)
• M21: 5,239,366 km (0.117 R)
• M22: 5,409,010 km (0.029 R)
• M23: 6,035,376 km (0.08 R)
• M24: 6,465,620 km (0.043 R)
• M25: 6,868,786 km (0.087 R)
• M26: 6,980,237 km (0.049 R)
• M27: 7,318,029 km (0.08 R)
• M28: 8,244,937 km (0.094 R)
• M29: 8,682,062 km (0.099 R)
• M30: 9,496,323 km (0.07 R)
• M31: 9,954,542 km (0.085 R)
• M32: 10,377,455 km (0.047 R)
• M33: 10,676,950 km (0.052 R)
• M34: 11,240,784 km (0.069 R)
• M35: 13,778,413 km (0.073 R)
• M36: 13,919,184 km (0.117 R)
• M37: 14,726,115 km (0.104 R)
• M38: 14,870,028 km (0.052 R)
• M39: 15,450,618 km (0.085 R)
• M40: 16,683,753 km (0.1 R)
• M41: 17,948,453 km (0.047 R)
• M42: 18,205,163 km (0.118 R)
• M43: 19,401,198 km (0.077 R)
• M44: 19,664,640 km (0.098 R)
• M45: 19,929,279 km (0.091 R)
• M46: 20,891,492 km (0.113 R)
• M47: 21,650,402 km (0.092 R)
• M48: 21,814,212 km (0.071 R)
• M49: 22,972,249 km (0.045 R)
• M50: 23,362,699 km (0.115 R)
• M51: 24,604,212 km (0.107 R)
• M52: 25,232,972 km (0.082 R)
• M53: 26,623,185 km (0.079 R)
• M54: 26,974,590 km (0.043 R)
• M55: 27,150,817 km (0.115 R)
• M56: 27,504,616 km (0.1 R)
• M57: 27,800,520 km (0.111 R)
• M58: 28,455,310 km (0.105 R)
• M59: 28,694,667 km (0.099 R)
• M60: 28,934,771 km (0.095 R)
• M61: 29,537,800 km (0.085 R)
• M62: 29,901,622 km (0.038 R)
• M63: 30,084,132 km (0.079 R)
• M64: 31,001,915 km (0.051 R)
• M65: 31,309,937 km (0.104 R)
• M66: 31,619,006 km (0.047 R)
• M67: 33,873,745 km (0.118 R)
• M68: 34,636,694 km (0.091 R)
• M69: 35,405,478 km (0.116 R)
• M70: 36,179,796 km (0.093 R)
• M71: 37,155,623 km (0.071 R)
• M72: 37,286,372 km (0.118 R)
• M73: 38,801,050 km (0.11 R)
• M74: 40,604,752 km (0.066 R)
• M75: 41,279,737 km (0.065 R)
• M76: 42,094,447 km (0.094 R)
• M77: 42,299,097 km (0.079 R)
• M78: 43,051,874 km (0.076 R)
• M79: 44,779,280 km (0.059 R)
• M80: 46,247,733 km (0.113 R)
• M81: 46,811,268 km (0.099 R)
• M82: 47,164,618 km (0.062 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 237 - 19,119 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit