🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.42 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 492.9

Radius: 12.3

Gravity: 3.26 G

Time & Orbit

Eccentricity (e): 0.149

Orbit Range: 0.71 AU - 0.97 AU

Year: 497 Days

Day: 8 Hours

Environment

Temp: -146 °C

Axial Tilt: 38.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 42,228,063 km

• M1: 153,487 km (0.09 R)
• M2: 246,687 km (0.089 R)
• M3: 326,423 km (0.11 R)
• M4: 433,385 km (0.097 R)
• M5: 542,292 km (0.094 R)
• M6: 643,570 km (0.058 R)
• M7: 720,613 km (0.096 R)
• M8: 1,026,840 km (0.084 R)
• M9: 1,105,379 km (0.039 R)
• M10: 1,224,758 km (0.094 R)
• M11: 1,303,745 km (0.088 R)
• M12: 1,399,787 km (0.112 R)
• M13: 1,545,944 km (0.092 R)
• M14: 1,686,417 km (0.087 R)
• M15: 1,763,908 km (0.06 R)
• M16: 1,853,966 km (0.104 R)
• M17: 1,980,526 km (0.118 R)
• M18: 2,182,035 km (0.089 R)
• M19: 2,273,140 km (0.074 R)
• M20: 2,353,025 km (0.081 R)
• M21: 2,547,801 km (0.103 R)
• M22: 2,676,306 km (0.105 R)
• M23: 2,767,561 km (0.097 R)
• M24: 2,853,280 km (0.091 R)
• M25: 2,933,165 km (0.119 R)
• M26: 3,047,757 km (0.078 R)
• M27: 3,379,416 km (0.082 R)
• M28: 3,506,873 km (0.107 R)
• M29: 3,730,223 km (0.066 R)
• M30: 3,973,170 km (0.112 R)
• M31: 4,077,888 km (0.108 R)
• M32: 4,335,945 km (0.07 R)
• M33: 4,451,434 km (0.116 R)
• M34: 4,529,076 km (0.06 R)
• M35: 4,622,873 km (0.027 R)
• M36: 4,812,414 km (0.057 R)
• M37: 4,908,157 km (0.112 R)
• M38: 5,028,732 km (0.087 R)
• M39: 5,182,968 km (0.084 R)
• M40: 5,281,104 km (0.073 R)
• M41: 5,454,488 km (0.087 R)
• M42: 5,671,704 km (0.095 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.92 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 892.2

Radius: 9.7

Gravity: 9.48 G

Time & Orbit

Eccentricity (e): 0.197

Orbit Range: 1.54 AU - 2.3 AU

Year: 1718 Days

Day: 6.5 Hours

Environment

Temp: -184 °C

Axial Tilt: 37.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 42,228,063 km

• M1: 124,765 km (0.1 R)
• M2: 191,934 km (0.051 R)
• M3: 316,549 km (0.08 R)
• M4: 470,336 km (0.032 R)
• M5: 546,930 km (0.033 R)
• M6: 796,459 km (0.09 R)
• M7: 961,615 km (0.099 R)
• M8: 1,100,442 km (0.045 R)
• M9: 1,167,462 km (0.076 R)
• M10: 1,610,870 km (0.103 R)
• M11: 1,766,152 km (0.098 R)
• M12: 1,996,533 km (0.101 R)
• M13: 2,249,204 km (0.085 R)
• M14: 2,373,071 km (0.038 R)
• M15: 2,550,644 km (0.077 R)
• M16: 3,081,567 km (0.084 R)
• M17: 3,345,906 km (0.108 R)
• M18: 3,690,280 km (0.088 R)
• M19: 3,970,926 km (0.071 R)
• M20: 4,046,024 km (0.115 R)
• M21: 4,304,828 km (0.117 R)
• M22: 4,459,513 km (0.048 R)
• M23: 4,522,044 km (0.085 R)
• M24: 4,806,580 km (0.09 R)
• M25: 4,870,607 km (0.101 R)
• M26: 5,080,792 km (0.104 R)
• M27: 5,293,969 km (0.072 R)
• M28: 5,360,092 km (0.066 R)
• M29: 5,526,744 km (0.052 R)
• M30: 5,661,382 km (0.052 R)
• M31: 5,746,054 km (0.104 R)
• M32: 6,054,375 km (0.106 R)
• M33: 6,315,424 km (0.101 R)
• M34: 6,473,997 km (0.076 R)
• M35: 6,848,890 km (0.12 R)
• M36: 7,157,510 km (0.119 R)
• M37: 7,230,813 km (0.07 R)
• M38: 7,415,118 km (0.102 R)
• M39: 7,582,518 km (0.097 R)
• M40: 7,675,867 km (0.091 R)
• M41: 7,996,605 km (0.047 R)
• M42: 8,437,470 km (0.083 R)
• M43: 8,925,607 km (0.077 R)
• M44: 9,143,422 km (0.102 R)
• M45: 10,072,873 km (0.07 R)
• M46: 10,134,508 km (0.107 R)
• M47: 10,196,292 km (0.068 R)
• M48: 10,361,747 km (0.112 R)
• M49: 10,444,774 km (0.044 R)
• M50: 10,527,950 km (0.049 R)
• M51: 11,223,281 km (0.106 R)
• M52: 11,329,944 km (0.071 R)
• M53: 11,760,038 km (0.066 R)
• M54: 12,107,853 km (0.085 R)
• M55: 12,217,209 km (0.113 R)
• M56: 12,392,987 km (0.071 R)
• M57: 12,658,224 km (0.115 R)
• M58: 12,835,946 km (0.034 R)
• M59: 12,925,256 km (0.05 R)
• M60: 13,059,445 km (0.1 R)
• M61: 13,194,083 km (0.081 R)
• M62: 13,306,731 km (0.075 R)
• M63: 13,555,661 km (0.114 R)
• M64: 14,058,011 km (0.069 R)
• M65: 14,219,128 km (0.085 R)
• M66: 14,519,969 km (0.091 R)
• M67: 14,822,905 km (0.042 R)
• M68: 15,104,448 km (0.103 R)
• M69: 15,198,695 km (0.037 R)
• M70: 15,411,423 km (0.049 R)
• M71: 15,983,635 km (0.083 R)
• M72: 16,175,868 km (0.109 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 227.8

Radius: 11.9

Gravity: 1.61 G

Time & Orbit

Eccentricity (e): 0.217

Orbit Range: 2.46 AU - 3.82 AU

Year: 3593 Days

Day: 8.7 Hours

Environment

Temp: -198 °C

Axial Tilt: 26.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 42,228,063 km

• M1: 148,551 km (0.089 R)
• M2: 252,222 km (0.082 R)
• M3: 380,278 km (0.119 R)
• M4: 517,309 km (0.063 R)
• M5: 658,380 km (0.076 R)
• M6: 936,782 km (0.088 R)
• M7: 1,242,710 km (0.077 R)
• M8: 1,613,563 km (0.1 R)
• M9: 1,691,952 km (0.049 R)
• M10: 1,864,438 km (0.091 R)
• M11: 2,103,795 km (0.115 R)
• M12: 2,227,363 km (0.11 R)
• M13: 2,481,829 km (0.103 R)
• M14: 3,116,872 km (0.113 R)
• M15: 3,373,432 km (0.04 R)
• M16: 3,548,162 km (0.082 R)
• M17: 3,741,144 km (0.116 R)
• M18: 3,831,351 km (0.077 R)
• M19: 3,907,048 km (0.114 R)
• M20: 4,215,070 km (0.04 R)
• M21: 4,499,156 km (0.066 R)
• M22: 4,708,144 km (0.12 R)
• M23: 4,854,900 km (0.052 R)
• M24: 5,152,749 km (0.067 R)
• M25: 5,490,840 km (0.116 R)
• M26: 5,628,171 km (0.118 R)
• M27: 5,731,842 km (0.115 R)
• M28: 5,976,435 km (0.084 R)
• M29: 6,206,516 km (0.081 R)
• M30: 6,313,778 km (0.109 R)
• M31: 6,511,995 km (0.101 R)
• M32: 7,287,810 km (0.088 R)
• M33: 7,667,489 km (0.063 R)
• M34: 7,782,680 km (0.07 R)
• M35: 8,151,289 km (0.107 R)
• M36: 8,367,308 km (0.071 R)
• M37: 8,565,376 km (0.089 R)
• M38: 8,885,515 km (0.101 R)
• M39: 8,986,344 km (0.071 R)
• M40: 9,148,508 km (0.085 R)
• M41: 9,270,730 km (0.112 R)
• M42: 9,373,055 km (0.105 R)
• M43: 9,537,612 km (0.118 R)
• M44: 9,806,888 km (0.049 R)
• M45: 10,015,877 km (0.119 R)
• M46: 10,099,801 km (0.098 R)
• M47: 10,226,211 km (0.103 R)
• M48: 10,523,313 km (0.055 R)
• M49: 10,608,583 km (0.094 R)
• M50: 10,758,630 km (0.08 R)
• M51: 10,866,191 km (0.117 R)
• M52: 10,952,509 km (0.094 R)
• M53: 11,234,650 km (0.085 R)
• M54: 11,322,016 km (0.102 R)
• M55: 11,717,552 km (0.056 R)
• M56: 11,894,975 km (0.063 R)
• M57: 13,437,778 km (0.111 R)
• M58: 14,138,345 km (0.115 R)
• M59: 14,232,741 km (0.091 R)
• M60: 14,350,924 km (0.058 R)
• M61: 14,540,763 km (0.071 R)
• M62: 14,803,009 km (0.095 R)
• M63: 14,946,772 km (0.117 R)
• M64: 15,332,435 km (0.044 R)
• M65: 15,526,464 km (0.049 R)
• M66: 16,261,438 km (0.092 R)
• M67: 16,459,356 km (0.075 R)
• M68: 16,608,356 km (0.109 R)
• M69: 16,782,637 km (0.105 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 248.9

Radius: 10.1

Gravity: 2.44 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 3.26 AU - 4.42 AU

Year: 4859 Days

Day: 9.2 Hours

Environment

Temp: -202 °C

Axial Tilt: 49.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 42,228,063 km

• M1: 300,093 km (0.036 R)
• M2: 442,211 km (0.093 R)
• M3: 506,538 km (0.087 R)
• M4: 592,258 km (0.104 R)
• M5: 999,164 km (0.09 R)
• M6: 1,167,911 km (0.103 R)
• M7: 1,346,381 km (0.081 R)
• M8: 1,559,707 km (0.115 R)
• M9: 1,824,795 km (0.025 R)
• M10: 1,963,023 km (0.072 R)
• M11: 2,368,284 km (0.107 R)
• M12: 2,580,862 km (0.085 R)
• M13: 2,752,302 km (0.046 R)
• M14: 3,073,787 km (0.108 R)
• M15: 3,205,733 km (0.091 R)
• M16: 3,509,716 km (0.063 R)
• M17: 4,109,154 km (0.08 R)
• M18: 4,328,465 km (0.031 R)
• M19: 4,439,466 km (0.075 R)
• M20: 4,759,456 km (0.096 R)
• M21: 5,086,926 km (0.033 R)
• M22: 5,263,302 km (0.06 R)
• M23: 5,342,290 km (0.116 R)
• M24: 6,745,817 km (0.076 R)
• M25: 6,810,293 km (0.104 R)
• M26: 6,918,154 km (0.107 R)
• M27: 7,135,519 km (0.048 R)
• M28: 7,201,193 km (0.083 R)
• M29: 7,289,156 km (0.094 R)
• M30: 7,532,702 km (0.09 R)
• M31: 7,824,118 km (0.107 R)
• M32: 8,073,498 km (0.083 R)
• M33: 8,187,791 km (0.102 R)
• M34: 8,931,591 km (0.064 R)
• M35: 9,120,982 km (0.059 R)
• M36: 9,240,062 km (0.109 R)
• M37: 9,311,719 km (0.114 R)
• M38: 9,600,294 km (0.062 R)
• M39: 9,867,326 km (0.095 R)
• M40: 10,063,150 km (0.114 R)
• M41: 10,834,177 km (0.097 R)
• M42: 10,909,724 km (0.096 R)
• M43: 11,546,712 km (0.114 R)
• M44: 12,169,637 km (0.047 R)
• M45: 12,300,835 km (0.041 R)
• M46: 12,458,810 km (0.114 R)
• M47: 12,803,483 km (0.107 R)
• M48: 13,043,887 km (0.07 R)
• M49: 13,312,864 km (0.115 R)
• M50: 13,475,028 km (0.102 R)
• M51: 13,610,863 km (0.027 R)
• M52: 13,910,956 km (0.091 R)
• M53: 14,240,969 km (0.07 R)
• M54: 14,323,847 km (0.08 R)
• M55: 14,852,525 km (0.076 R)
• M56: 15,077,072 km (0.092 R)
• M57: 15,161,595 km (0.115 R)
• M58: 15,246,267 km (0.1 R)
• M59: 15,387,787 km (0.117 R)
• M60: 15,814,739 km (0.113 R)
• M61: 16,390,092 km (0.088 R)
• M62: 16,680,312 km (0.114 R)
• M63: 17,472,583 km (0.105 R)
• M64: 17,798,855 km (0.109 R)
• M65: 17,888,165 km (0.084 R)
• M66: 18,336,959 km (0.098 R)
• M67: 18,427,316 km (0.108 R)
• M68: 18,910,966 km (0.106 R)
• M69: 19,490,807 km (0.099 R)
• M70: 19,613,627 km (0.099 R)
• M71: 19,705,929 km (0.1 R)
• M72: 20,231,616 km (0.101 R)
• M73: 20,356,081 km (0.102 R)
• M74: 20,699,409 km (0.107 R)

Planet 5 - Ice Giant

Semi-Major Axis: 6.9 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 196.3

Radius: 6.2

Gravity: 5.11 G

Time & Orbit

Eccentricity (e): 0.076

Orbit Range: 6.38 AU - 7.42 AU

Year: 11703 Days

Day: 24.7 Hours

Environment

Temp: -218 °C

Axial Tilt: 124.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 42,228,063 km

• M1: 78,240 km (0.117 R)
• M2: 168,746 km (0.116 R)
• M3: 306,376 km (0.096 R)
• M4: 433,834 km (0.111 R)
• M5: 516,561 km (0.045 R)
• M6: 617,690 km (0.059 R)
• M7: 698,024 km (0.103 R)
• M8: 753,674 km (0.046 R)
• M9: 796,309 km (0.055 R)
• M10: 1,038,359 km (0.112 R)
• M11: 1,532,780 km (0.106 R)
• M12: 1,756,429 km (0.056 R)
• M13: 2,091,079 km (0.082 R)
• M14: 2,276,281 km (0.083 R)
• M15: 2,339,262 km (0.102 R)
• M16: 2,773,545 km (0.07 R)
• M17: 3,279,933 km (0.088 R)
• M18: 3,351,142 km (0.086 R)
• M19: 3,690,430 km (0.043 R)
• M20: 3,889,395 km (0.1 R)
• M21: 4,962,610 km (0.107 R)
• M22: 5,348,872 km (0.12 R)
• M23: 6,033,581 km (0.071 R)
• M24: 6,624,942 km (0.077 R)
• M25: 6,866,692 km (0.069 R)
• M26: 7,080,617 km (0.083 R)
• M27: 7,203,885 km (0.103 R)
• M28: 7,265,819 km (0.119 R)
• M29: 7,798,986 km (0.065 R)
• M30: 7,926,144 km (0.093 R)
• M31: 8,150,690 km (0.071 R)
• M32: 8,215,167 km (0.081 R)
• M33: 8,671,441 km (0.065 R)
• M34: 8,935,780 km (0.116 R)
• M35: 9,608,522 km (0.112 R)
• M36: 10,089,030 km (0.101 R)
• M37: 10,824,304 km (0.093 R)
• M38: 11,216,400 km (0.091 R)
• M39: 11,540,728 km (0.094 R)
• M40: 11,722,190 km (0.095 R)
• M41: 11,977,853 km (0.12 R)
• M42: 12,161,559 km (0.089 R)
• M43: 12,383,263 km (0.04 R)
• M44: 12,943,507 km (0.063 R)
• M45: 14,166,021 km (0.06 R)
• M46: 14,399,244 km (0.086 R)
• M47: 14,673,008 km (0.093 R)
• M48: 14,830,235 km (0.073 R)
• M49: 15,424,887 km (0.08 R)
• M50: 15,544,715 km (0.116 R)
• M51: 15,664,842 km (0.112 R)
• M52: 16,148,641 km (0.103 R)
• M53: 16,719,208 km (0.1 R)
• M54: 16,760,197 km (0.117 R)
• M55: 18,343,093 km (0.115 R)
• M56: 18,512,437 km (0.09 R)
• M57: 19,152,267 km (0.076 R)
• M58: 19,886,195 km (0.074 R)
• M59: 20,761,342 km (0.06 R)
• M60: 21,247,984 km (0.106 R)
• M61: 21,292,415 km (0.1 R)
• M62: 21,336,845 km (0.048 R)
• M63: 22,097,550 km (0.064 R)
• M64: 22,142,430 km (0.08 R)
• M65: 23,415,358 km (0.116 R)
• M66: 24,571,749 km (0.115 R)
• M67: 24,664,949 km (0.104 R)
• M68: 25,746,542 km (0.1 R)
• M69: 27,761,176 km (0.117 R)
• M70: 28,004,422 km (0.101 R)
• M71: 28,541,927 km (0.095 R)
• M72: 28,738,200 km (0.115 R)
• M73: 28,984,288 km (0.115 R)
• M74: 29,527,927 km (0.055 R)
• M75: 30,274,719 km (0.077 R)
• M76: 30,525,146 km (0.119 R)
• M77: 30,776,022 km (0.112 R)
• M78: 30,926,966 km (0.113 R)
• M79: 31,584,000 km (0.109 R)
• M80: 31,685,427 km (0.106 R)
• M81: 32,092,334 km (0.081 R)
• M82: 32,143,346 km (0.117 R)
• M83: 32,296,535 km (0.097 R)
• M84: 32,398,710 km (0.106 R)
• M85: 32,552,347 km (0.069 R)
• M86: 33,220,451 km (0.085 R)
• M87: 33,997,014 km (0.11 R)
• M88: 34,884,428 km (0.084 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.44 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 272.8

Radius: 6.8

Gravity: 5.9 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 6.91 AU - 7.97 AU

Year: 13103 Days

Day: 22.8 Hours

Environment

Temp: -233 °C

Axial Tilt: 42.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 42,228,063 km

• M1: 126,709 km (0.044 R)
• M2: 473,477 km (0.032 R)
• M3: 704,008 km (0.088 R)
• M4: 898,784 km (0.047 R)
• M5: 967,599 km (0.045 R)
• M6: 1,038,209 km (0.105 R)
• M7: 1,184,666 km (0.111 R)
• M8: 1,457,382 km (0.093 R)
• M9: 1,601,146 km (0.083 R)
• M10: 1,685,370 km (0.104 R)
• M11: 2,508,457 km (0.084 R)
• M12: 2,656,260 km (0.081 R)
• M13: 4,374,092 km (0.1 R)
• M14: 4,522,643 km (0.108 R)
• M15: 4,672,689 km (0.091 R)
• M16: 4,733,127 km (0.12 R)
• M17: 4,885,567 km (0.067 R)
• M18: 5,101,736 km (0.103 R)
• M19: 5,195,235 km (0.108 R)
• M20: 5,289,482 km (0.117 R)
• M21: 5,997,079 km (0.101 R)
• M22: 6,228,507 km (0.067 R)
• M23: 6,598,164 km (0.108 R)
• M24: 8,292,659 km (0.042 R)
• M25: 8,661,717 km (0.037 R)
• M26: 8,810,866 km (0.11 R)
• M27: 9,685,116 km (0.094 R)
• M28: 10,348,881 km (0.095 R)
• M29: 11,596,677 km (0.118 R)
• M30: 12,342,722 km (0.097 R)
• M31: 12,933,783 km (0.077 R)
• M32: 13,447,801 km (0.066 R)
• M33: 13,794,120 km (0.118 R)
• M34: 15,660,055 km (0.12 R)
• M35: 15,887,443 km (0.106 R)
• M36: 16,161,656 km (0.066 R)
• M37: 16,299,436 km (0.096 R)
• M38: 16,576,042 km (0.12 R)
• M39: 17,087,368 km (0.104 R)
• M40: 17,227,691 km (0.1 R)
• M41: 17,274,515 km (0.118 R)
• M42: 17,509,384 km (0.064 R)
• M43: 17,650,903 km (0.036 R)
• M44: 17,887,567 km (0.079 R)
• M45: 17,982,562 km (0.106 R)
• M46: 18,172,850 km (0.086 R)
• M47: 18,364,036 km (0.109 R)
• M48: 18,700,033 km (0.042 R)
• M49: 18,844,545 km (0.115 R)
• M50: 19,280,622 km (0.087 R)
• M51: 19,426,779 km (0.077 R)
• M52: 20,064,066 km (0.09 R)
• M53: 20,708,384 km (0.104 R)
• M54: 21,007,879 km (0.106 R)
• M55: 21,258,755 km (0.032 R)
• M56: 21,359,285 km (0.066 R)
• M57: 21,966,203 km (0.026 R)
• M58: 22,425,020 km (0.049 R)
• M59: 23,925,038 km (0.101 R)
• M60: 24,344,510 km (0.113 R)
• M61: 24,607,952 km (0.06 R)
• M62: 24,766,376 km (0.092 R)
• M63: 24,872,292 km (0.068 R)
• M64: 25,457,219 km (0.116 R)
• M65: 26,911,909 km (0.084 R)
• M66: 27,786,757 km (0.088 R)
• M67: 28,338,175 km (0.114 R)
• M68: 29,172,183 km (0.063 R)
• M69: 29,620,229 km (0.056 R)
• M70: 29,901,323 km (0.057 R)
• M71: 30,523,202 km (0.098 R)
• M72: 30,693,444 km (0.081 R)
• M73: 30,807,138 km (0.061 R)
• M74: 31,492,446 km (0.088 R)
• M75: 31,664,484 km (0.114 R)
• M76: 32,936,066 km (0.081 R)
• M77: 34,578,501 km (0.045 R)
• M78: 36,007,310 km (0.104 R)
• M79: 36,127,287 km (0.044 R)
• M80: 36,247,414 km (0.116 R)
• M81: 37,091,595 km (0.115 R)
• M82: 37,698,663 km (0.107 R)
• M83: 37,820,436 km (0.109 R)
• M84: 38,247,688 km (0.104 R)
• M85: 39,168,762 km (0.096 R)
• M86: 39,292,180 km (0.102 R)
• M87: 40,283,715 km (0.119 R)
• M88: 40,345,947 km (0.081 R)
• M89: 40,408,180 km (0.079 R)
• M90: 41,534,652 km (0.109 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: 384 - 16,581 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit