🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.27 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.53 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.52

Radius: 1.83

Gravity: 1.35 G

Time & Orbit

Eccentricity (e): 0.051

Orbit Range: 0.5 AU - 0.56 AU

Year: 249 Days

Day: 30.6 Hours

Environment

Temp: -126 °C

Axial Tilt: 39.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 87,935,019 km

• M1: 183,706 km (0.073 R)
• M2: 421,268 km (0.058 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 26

Radius: 12.3

Gravity: 0.17 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 0.68 AU - 0.92 AU

Year: 462 Days

Day: 9.9 Hours

Environment

Temp: -148 °C

Axial Tilt: 34.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 87,935,019 km

• M1: 155,133 km (0.094 R)
• M2: 269,127 km (0.054 R)
• M3: 487,839 km (0.089 R)
• M4: 597,643 km (0.032 R)
• M5: 694,733 km (0.053 R)
• M6: 822,040 km (0.114 R)
• M7: 971,040 km (0.1 R)
• M8: 1,057,059 km (0.065 R)
• M9: 1,134,251 km (0.064 R)
• M10: 1,225,506 km (0.089 R)
• M11: 1,338,901 km (0.082 R)
• M12: 1,532,780 km (0.072 R)
• M13: 1,685,070 km (0.07 R)
• M14: 2,002,517 km (0.115 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 349.2

Radius: 8.7

Gravity: 4.61 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 0.9 AU - 1.38 AU

Year: 786 Days

Day: 9.6 Hours

Environment

Temp: -171 °C

Axial Tilt: 39.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 87,935,019 km

• M1: 112,198 km (0.095 R)
• M2: 181,013 km (0.112 R)
• M3: 236,365 km (0.07 R)
• M4: 336,894 km (0.112 R)
• M5: 478,264 km (0.092 R)
• M6: 542,591 km (0.057 R)
• M7: 645,216 km (0.096 R)
• M8: 726,896 km (0.05 R)
• M9: 866,172 km (0.108 R)
• M10: 941,868 km (0.059 R)
• M11: 998,865 km (0.05 R)
• M12: 1,111,213 km (0.075 R)
• M13: 1,284,896 km (0.116 R)
• M14: 1,437,486 km (0.088 R)
• M15: 1,497,774 km (0.111 R)
• M16: 1,552,826 km (0.041 R)
• M17: 1,684,023 km (0.105 R)
• M18: 1,760,617 km (0.106 R)
• M19: 1,825,393 km (0.043 R)
• M20: 1,910,963 km (0.108 R)
• M21: 1,970,952 km (0.104 R)
• M22: 2,038,271 km (0.051 R)
• M23: 2,196,246 km (0.057 R)
• M24: 2,273,289 km (0.084 R)
• M25: 2,358,410 km (0.118 R)
• M26: 2,459,090 km (0.068 R)
• M27: 2,568,446 km (0.117 R)
• M28: 2,672,117 km (0.109 R)
• M29: 2,747,066 km (0.077 R)
• M30: 3,022,475 km (0.043 R)
• M31: 3,092,786 km (0.089 R)
• M32: 3,187,332 km (0.108 R)
• M33: 3,266,918 km (0.083 R)
• M34: 3,363,259 km (0.117 R)
• M35: 3,817,139 km (0.113 R)
• M36: 4,055,598 km (0.049 R)
• M37: 4,220,306 km (0.059 R)
• M38: 4,502,597 km (0.098 R)
• M39: 4,673,138 km (0.119 R)
• M40: 4,818,547 km (0.119 R)
• M41: 4,873,300 km (0.09 R)
• M42: 4,928,502 km (0.066 R)
• M43: 5,132,254 km (0.107 R)
• M44: 5,197,628 km (0.12 R)
• M45: 5,301,001 km (0.098 R)
• M46: 5,414,695 km (0.106 R)
• M47: 5,538,562 km (0.089 R)
• M48: 5,847,781 km (0.099 R)
• M49: 5,974,939 km (0.111 R)
• M50: 6,063,501 km (0.058 R)
• M51: 6,122,891 km (0.089 R)
• M52: 6,311,983 km (0.116 R)
• M53: 6,412,363 km (0.101 R)
• M54: 6,482,973 km (0.118 R)
• M55: 6,716,496 km (0.095 R)
• M56: 6,829,292 km (0.117 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.5 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 118

Radius: 12.8

Gravity: 0.72 G

Time & Orbit

Eccentricity (e): 0.096

Orbit Range: 4.07 AU - 4.93 AU

Year: 6164 Days

Day: 14.5 Hours

Environment

Temp: -204 °C

Axial Tilt: 23 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 87,935,019 km

• M1: 162,314 km (0.057 R)
• M2: 354,397 km (0.063 R)
• M3: 521,648 km (0.09 R)
• M4: 783,294 km (0.119 R)
• M5: 1,046,736 km (0.107 R)
• M6: 1,305,690 km (0.028 R)
• M7: 1,396,795 km (0.043 R)
• M8: 1,695,841 km (0.117 R)
• M9: 2,163,036 km (0.097 R)
• M10: 2,313,681 km (0.099 R)
• M11: 2,496,489 km (0.119 R)
• M12: 2,655,063 km (0.113 R)
• M13: 2,817,078 km (0.056 R)
• M14: 2,982,383 km (0.095 R)
• M15: 3,120,013 km (0.112 R)
• M16: 3,228,621 km (0.117 R)
• M17: 3,370,141 km (0.116 R)
• M18: 3,562,075 km (0.085 R)
• M19: 3,873,687 km (0.083 R)
• M20: 4,228,384 km (0.111 R)
• M21: 4,523,241 km (0.061 R)
• M22: 5,170,102 km (0.114 R)
• M23: 5,410,805 km (0.115 R)
• M24: 5,750,393 km (0.096 R)
• M25: 6,019,370 km (0.077 R)
• M26: 6,155,354 km (0.099 R)
• M27: 6,253,191 km (0.09 R)
• M28: 6,629,729 km (0.095 R)
• M29: 6,729,959 km (0.073 R)
• M30: 6,851,134 km (0.048 R)
• M31: 7,239,191 km (0.051 R)
• M32: 7,425,590 km (0.094 R)
• M33: 7,697,708 km (0.096 R)
• M34: 8,058,538 km (0.118 R)
• M35: 8,251,819 km (0.112 R)
• M36: 8,577,344 km (0.115 R)
• M37: 8,774,813 km (0.104 R)
• M38: 9,018,059 km (0.093 R)
• M39: 9,129,360 km (0.094 R)
• M40: 9,967,557 km (0.12 R)
• M41: 10,059,559 km (0.116 R)
• M42: 10,175,198 km (0.112 R)
• M43: 11,091,485 km (0.061 R)
• M44: 11,354,628 km (0.051 R)
• M45: 11,523,225 km (0.109 R)
• M46: 11,716,954 km (0.082 R)
• M47: 12,107,554 km (0.115 R)
• M48: 12,230,524 km (0.111 R)
• M49: 12,403,459 km (0.103 R)
• M50: 12,552,309 km (0.064 R)
• M51: 12,676,774 km (0.09 R)
• M52: 12,801,539 km (0.077 R)
• M53: 12,977,166 km (0.061 R)
• M54: 13,153,393 km (0.114 R)
• M55: 13,279,953 km (0.116 R)
• M56: 13,533,970 km (0.101 R)
• M57: 13,841,094 km (0.05 R)
• M58: 14,592,674 km (0.034 R)
• M59: 14,776,081 km (0.105 R)
• M60: 15,013,044 km (0.114 R)
• M61: 15,277,832 km (0.12 R)
• M62: 15,490,710 km (0.12 R)
• M63: 15,919,607 km (0.051 R)
• M64: 16,761,693 km (0.103 R)
• M65: 16,926,251 km (0.113 R)
• M66: 17,257,162 km (0.09 R)
• M67: 17,451,190 km (0.115 R)
• M68: 17,618,141 km (0.099 R)
• M69: 17,785,541 km (0.087 R)
• M70: 17,869,466 km (0.116 R)
• M71: 17,981,514 km (0.095 R)
• M72: 18,065,738 km (0.072 R)
• M73: 18,178,236 km (0.115 R)
• M74: 18,858,158 km (0.064 R)
• M75: 19,316,077 km (0.114 R)

Planet 5 - Ice Giant

Semi-Major Axis: 8.04 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 148.3

Radius: 6.7

Gravity: 3.3 G

Time & Orbit

Eccentricity (e): 0.137

Orbit Range: 6.94 AU - 9.14 AU

Year: 14720 Days

Day: 17.8 Hours

Environment

Temp: -235 °C

Axial Tilt: 15.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 87,935,019 km

• M1: 132,245 km (0.072 R)
• M2: 426,354 km (0.118 R)
• M3: 474,076 km (0.028 R)
• M4: 588,967 km (0.062 R)
• M5: 908,508 km (0.12 R)
• M6: 1,154,297 km (0.115 R)
• M7: 1,205,908 km (0.12 R)
• M8: 1,383,930 km (0.116 R)
• M9: 1,476,232 km (0.118 R)
• M10: 1,551,480 km (0.1 R)
• M11: 1,745,358 km (0.036 R)
• M12: 2,417,053 km (0.072 R)
• M13: 2,757,238 km (0.091 R)
• M14: 3,160,853 km (0.075 R)
• M15: 3,209,622 km (0.073 R)
• M16: 3,307,759 km (0.103 R)
• M17: 3,813,699 km (0.112 R)
• M18: 4,128,901 km (0.071 R)
• M19: 4,562,137 km (0.08 R)
• M20: 4,617,338 km (0.068 R)
• M21: 4,728,340 km (0.062 R)
• M22: 5,066,730 km (0.063 R)
• M23: 5,618,597 km (0.086 R)
• M24: 5,856,607 km (0.111 R)
• M25: 6,497,185 km (0.12 R)
• M26: 6,590,534 km (0.107 R)
• M27: 6,778,579 km (0.105 R)
• M28: 6,841,559 km (0.051 R)
• M29: 6,904,839 km (0.108 R)
• M30: 7,191,918 km (0.082 R)
• M31: 7,288,558 km (0.078 R)
• M32: 7,976,558 km (0.109 R)
• M33: 8,345,168 km (0.107 R)
• M34: 8,685,054 km (0.08 R)
• M35: 8,995,021 km (0.069 R)
• M36: 9,133,848 km (0.082 R)
• M37: 10,306,545 km (0.105 R)
• M38: 10,781,369 km (0.101 R)
• M39: 11,077,274 km (0.076 R)
• M40: 11,488,368 km (0.102 R)
• M41: 12,325,369 km (0.073 R)
• M42: 12,518,350 km (0.08 R)
• M43: 12,907,304 km (0.094 R)
• M44: 13,181,966 km (0.082 R)
• M45: 13,418,929 km (0.072 R)
• M46: 13,498,216 km (0.092 R)
• M47: 14,380,843 km (0.063 R)
• M48: 15,116,715 km (0.089 R)
• M49: 16,032,703 km (0.113 R)
• M50: 16,243,486 km (0.093 R)
• M51: 16,624,961 km (0.083 R)
• M52: 17,095,446 km (0.061 R)
• M53: 17,440,269 km (0.084 R)
• M54: 17,483,503 km (0.063 R)
• M55: 17,656,887 km (0.119 R)
• M56: 17,918,085 km (0.066 R)
• M57: 18,268,443 km (0.054 R)
• M58: 18,312,275 km (0.063 R)
• M59: 18,842,450 km (0.093 R)
• M60: 19,064,753 km (0.051 R)
• M61: 19,691,867 km (0.061 R)
• M62: 19,737,045 km (0.113 R)
• M63: 20,280,385 km (0.044 R)
• M64: 20,416,968 km (0.101 R)
• M65: 20,736,958 km (0.109 R)
• M66: 20,874,588 km (0.085 R)
• M67: 21,289,423 km (0.098 R)
• M68: 21,706,801 km (0.104 R)
• M69: 22,549,934 km (0.096 R)
• M70: 22,644,181 km (0.089 R)
• M71: 27,173,107 km (0.053 R)
• M72: 27,273,487 km (0.099 R)
• M73: 28,233,307 km (0.12 R)
• M74: 28,794,149 km (0.057 R)
• M75: 28,998,949 km (0.075 R)
• M76: 30,654,997 km (0.061 R)
• M77: 32,341,414 km (0.104 R)
• M78: 32,660,955 km (0.097 R)
• M79: 32,714,362 km (0.06 R)
• M80: 32,874,581 km (0.088 R)
• M81: 33,249,623 km (0.031 R)
• M82: 34,491,584 km (0.077 R)
• M83: 34,763,553 km (0.067 R)
• M84: 36,965,035 km (0.115 R)
• M85: 37,243,437 km (0.08 R)

Planet 6 - Ice Giant

Semi-Major Axis: 10.32 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 929.5

Radius: 5.7

Gravity: 28.61 G

Time & Orbit

Eccentricity (e): 0.201

Orbit Range: 8.25 AU - 12.39 AU

Year: 21406 Days

Day: 21.4 Hours

Environment

Temp: -231 °C

Axial Tilt: 10.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 87,935,019 km

• M1: 122,521 km (0.116 R)
• M2: 186,698 km (0.116 R)
• M3: 266,135 km (0.049 R)
• M4: 419,024 km (0.075 R)
• M5: 505,790 km (0.1 R)
• M6: 575,054 km (0.072 R)
• M7: 672,442 km (0.113 R)
• M8: 749,186 km (0.093 R)
• M9: 1,026,092 km (0.1 R)
• M10: 1,667,119 km (0.096 R)
• M11: 1,736,981 km (0.074 R)
• M12: 3,153,374 km (0.09 R)
• M13: 3,916,472 km (0.057 R)
• M14: 4,009,821 km (0.117 R)
• M15: 4,151,341 km (0.037 R)
• M16: 4,439,317 km (0.063 R)
• M17: 4,487,936 km (0.03 R)
• M18: 4,933,588 km (0.057 R)
• M19: 5,136,144 km (0.093 R)
• M20: 5,707,308 km (0.099 R)
• M21: 6,189,612 km (0.088 R)
• M22: 7,422,448 km (0.091 R)
• M23: 7,830,252 km (0.106 R)
• M24: 10,039,812 km (0.096 R)
• M25: 10,425,775 km (0.079 R)
• M26: 10,882,048 km (0.095 R)
• M27: 11,545,216 km (0.088 R)
• M28: 13,049,572 km (0.035 R)
• M29: 13,259,607 km (0.07 R)
• M30: 13,611,910 km (0.074 R)
• M31: 14,038,713 km (0.103 R)
• M32: 15,789,606 km (0.082 R)
• M33: 15,938,606 km (0.11 R)
• M34: 16,842,327 km (0.057 R)
• M35: 16,918,322 km (0.074 R)
• M36: 17,070,763 km (0.075 R)
• M37: 18,777,824 km (0.098 R)
• M38: 20,457,210 km (0.118 R)
• M39: 21,191,586 km (0.104 R)
• M40: 22,602,144 km (0.089 R)
• M41: 22,769,993 km (0.096 R)
• M42: 22,938,440 km (0.101 R)
• M43: 23,957,201 km (0.086 R)
• M44: 24,471,968 km (0.096 R)
• M45: 25,775,264 km (0.116 R)
• M46: 26,126,520 km (0.082 R)
• M47: 26,922,680 km (0.117 R)
• M48: 33,476,862 km (0.083 R)
• M49: 33,572,455 km (0.099 R)
• M50: 34,921,529 km (0.102 R)
• M51: 37,672,035 km (0.052 R)
• M52: 37,771,518 km (0.108 R)
• M53: 38,270,426 km (0.106 R)
• M54: 39,476,784 km (0.1 R)
• M55: 39,577,762 km (0.052 R)
• M56: 42,546,532 km (0.113 R)
• M57: 43,482,267 km (0.088 R)
• M58: 44,846,001 km (0.107 R)
• M59: 45,268,316 km (0.115 R)
• M60: 45,374,081 km (0.11 R)
• M61: 46,330,161 km (0.118 R)
• M62: 46,757,114 km (0.074 R)
• M63: 47,185,412 km (0.08 R)
• M64: 48,261,919 km (0.041 R)
• M65: 49,020,230 km (0.089 R)
• M66: 49,673,375 km (0.066 R)
• M67: 50,000,994 km (0.07 R)
• M68: 50,219,856 km (0.034 R)
• M69: 50,878,236 km (0.084 R)
• M70: 52,425,676 km (0.074 R)
• M71: 52,647,979 km (0.093 R)
• M72: 53,764,128 km (0.08 R)
• M73: 57,502,878 km (0.086 R)
• M74: 60,041,405 km (0.099 R)
• M75: 60,506,953 km (0.111 R)
• M76: 60,973,699 km (0.112 R)
• M77: 62,380,816 km (0.064 R)
• M78: 63,088,414 km (0.107 R)
• M79: 63,561,742 km (0.037 R)
• M80: 66,185,389 km (0.076 R)
• M81: 67,027,625 km (0.119 R)
• M82: 67,752,427 km (0.1 R)
• M83: 69,209,510 km (0.109 R)
• M84: 71,045,674 km (0.078 R)
• M85: 71,414,732 km (0.066 R)
• M86: 71,907,956 km (0.101 R)
• M87: 72,649,812 km (0.11 R)
• M88: 72,773,679 km (0.12 R)
• M89: 76,649,012 km (0.098 R)
• M90: 81,876,411 km (0.112 R)
• M91: 82,005,214 km (0.096 R)
• M92: 83,817,293 km (0.089 R)
• M93: 85,381,040 km (0.102 R)
• M94: 87,217,503 km (0.096 R)
• M95: 87,612,741 km (0.12 R)

Planet 7 - Ice Giant

Semi-Major Axis: 11.13 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 735.8

Radius: 3.1

Gravity: 76.57 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 10.75 AU - 11.51 AU

Year: 23975 Days

Day: 23.8 Hours

Environment

Temp: -232 °C

Axial Tilt: 23.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 87,935,019 km

• M1: 69,563 km (0.111 R)
• M2: 268,678 km (0.087 R)
• M3: 614,099 km (0.102 R)
• M4: 768,185 km (0.098 R)
• M5: 822,339 km (0.109 R)
• M6: 849,866 km (0.043 R)
• M7: 934,089 km (0.112 R)
• M8: 991,983 km (0.103 R)
• M9: 2,451,460 km (0.067 R)
• M10: 2,571,737 km (0.105 R)
• M11: 2,652,969 km (0.041 R)
• M12: 3,245,227 km (0.119 R)
• M13: 3,692,375 km (0.059 R)
• M14: 3,738,152 km (0.118 R)
• M15: 4,253,815 km (0.07 R)
• M16: 4,350,007 km (0.08 R)
• M17: 4,398,477 km (0.106 R)
• M18: 6,418,197 km (0.103 R)
• M19: 6,473,249 km (0.066 R)
• M20: 6,528,451 km (0.109 R)
• M21: 7,375,624 km (0.074 R)
• M22: 7,959,355 km (0.054 R)
• M23: 8,077,836 km (0.045 R)
• M24: 8,137,227 km (0.101 R)
• M25: 8,801,142 km (0.105 R)
• M26: 9,419,430 km (0.084 R)
• M27: 11,826,160 km (0.092 R)
• M28: 12,165,149 km (0.096 R)
• M29: 12,714,173 km (0.03 R)
• M30: 14,409,267 km (0.086 R)
• M31: 15,356,670 km (0.084 R)
• M32: 15,430,272 km (0.063 R)
• M33: 15,504,174 km (0.097 R)
• M34: 18,005,151 km (0.11 R)
• M35: 18,238,673 km (0.069 R)
• M36: 20,384,804 km (0.089 R)
• M37: 21,035,854 km (0.09 R)
• M38: 21,117,684 km (0.105 R)
• M39: 21,363,922 km (0.045 R)
• M40: 25,517,507 km (0.084 R)
• M41: 26,130,858 km (0.044 R)
• M42: 26,571,723 km (0.069 R)
• M43: 27,015,281 km (0.105 R)
• M44: 28,813,298 km (0.049 R)
• M45: 29,818,596 km (0.113 R)
• M46: 30,002,601 km (0.05 R)
• M47: 30,187,055 km (0.071 R)
• M48: 30,371,809 km (0.103 R)
• M49: 31,394,759 km (0.113 R)
• M50: 32,145,740 km (0.085 R)
• M51: 34,145,116 km (0.084 R)
• M52: 35,208,457 km (0.093 R)
• M53: 38,362,728 km (0.098 R)
• M54: 38,863,732 km (0.065 R)
• M55: 41,606,160 km (0.101 R)
• M56: 42,327,222 km (0.098 R)
• M57: 42,533,966 km (0.06 R)
• M58: 43,990,899 km (0.085 R)
• M59: 44,095,618 km (0.11 R)
• M60: 47,489,096 km (0.111 R)
• M61: 47,811,629 km (0.092 R)
• M62: 48,783,267 km (0.112 R)
• M63: 50,198,164 km (0.097 R)
• M64: 50,307,520 km (0.116 R)
• M65: 50,417,026 km (0.115 R)
• M66: 50,965,601 km (0.056 R)
• M67: 51,075,555 km (0.081 R)
• M68: 53,291,100 km (0.086 R)
• M69: 54,298,342 km (0.057 R)
• M70: 56,217,982 km (0.098 R)
• M71: 56,559,065 km (0.037 R)
• M72: 58,159,613 km (0.117 R)
• M73: 58,504,586 km (0.049 R)
• M74: 59,775,120 km (0.103 R)
• M75: 60,355,710 km (0.111 R)
• M76: 62,578,734 km (0.065 R)
• M77: 63,641,029 km (0.119 R)
• M78: 64,947,467 km (0.042 R)
• M79: 65,185,926 km (0.109 R)
• M80: 67,707,697 km (0.1 R)
• M81: 67,949,447 km (0.094 R)
• M82: 68,191,497 km (0.099 R)
• M83: 68,676,642 km (0.054 R)
• M84: 71,488,035 km (0.098 R)
• M85: 72,227,498 km (0.116 R)
• M86: 73,589,885 km (0.075 R)
• M87: 76,465,904 km (0.118 R)
• M88: 76,591,866 km (0.094 R)
• M89: 76,843,789 km (0.064 R)
• M90: 77,096,011 km (0.11 R)
• M91: 78,869,344 km (0.085 R)
• M92: 82,456,102 km (0.067 R)
• M93: 83,620,273 km (0.044 R)
• M94: 85,834,022 km (0.031 R)
• M95: 87,013,751 km (0.114 R)
• M96: 87,276,595 km (0.07 R)

Kuiper Belt

Range: 30 - 50 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 319 - 19,027 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit