🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.84 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.44

Radius: 0.72

Gravity: 0.85 G

Time & Orbit

Eccentricity (e): 0.097

Orbit Range: 0.76 AU - 0.92 AU

Year: 295 Days

Day: 41 Hours

Environment

Temp: 34 °C

Axial Tilt: 2.2 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 2 - Terrestrial

Semi-Major Axis: 1.68 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.08

Radius: 1.75

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.018

Orbit Range: 1.65 AU - 1.71 AU

Year: 834 Days

Day: 46.8 Hours

Environment

Temp: -59 °C

Axial Tilt: 41.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 2.47 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.06

Radius: 1.75

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.128

Orbit Range: 2.15 AU - 2.79 AU

Year: 1486 Days

Day: 34.6 Hours

Environment

Temp: -100 °C

Axial Tilt: 13.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 6.5 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 368.1

Radius: 11.7

Gravity: 2.69 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 5.51 AU - 7.49 AU

Year: 6345 Days

Day: 7.8 Hours

Environment

Temp: -162 °C

Axial Tilt: 46.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 53,304,874 km

• M1: 484,996 km (0.091 R)
• M2: 675,734 km (0.112 R)
• M3: 757,264 km (0.098 R)
• M4: 880,234 km (0.045 R)
• M5: 970,591 km (0.064 R)
• M6: 1,425,967 km (0.093 R)
• M7: 1,597,256 km (0.098 R)
• M8: 1,742,666 km (0.102 R)
• M9: 1,842,148 km (0.08 R)
• M10: 2,169,917 km (0.087 R)
• M11: 3,039,530 km (0.117 R)
• M12: 3,832,099 km (0.059 R)
• M13: 3,962,997 km (0.04 R)
• M14: 4,547,326 km (0.071 R)
• M15: 5,039,204 km (0.101 R)
• M16: 5,134,947 km (0.055 R)
• M17: 5,352,313 km (0.112 R)
• M18: 6,048,242 km (0.09 R)
• M19: 6,201,131 km (0.039 R)
• M20: 6,458,738 km (0.11 R)
• M21: 7,306,958 km (0.026 R)
• M22: 7,827,260 km (0.088 R)
• M23: 8,105,811 km (0.085 R)
• M24: 8,274,557 km (0.104 R)
• M25: 8,359,379 km (0.106 R)
• M26: 8,501,497 km (0.115 R)
• M27: 8,759,105 km (0.116 R)
• M28: 9,282,249 km (0.048 R)
• M29: 9,785,646 km (0.118 R)
• M30: 9,875,404 km (0.102 R)
• M31: 10,206,913 km (0.045 R)
• M32: 10,298,018 km (0.03 R)
• M33: 10,480,976 km (0.095 R)
• M34: 10,572,830 km (0.103 R)
• M35: 10,726,467 km (0.097 R)
• M36: 10,850,034 km (0.076 R)
• M37: 11,129,633 km (0.03 R)
• M38: 11,254,697 km (0.085 R)
• M39: 11,506,320 km (0.094 R)
• M40: 11,601,016 km (0.085 R)
• M41: 11,727,875 km (0.078 R)
• M42: 12,046,967 km (0.117 R)
• M43: 12,726,291 km (0.039 R)
• M44: 13,021,298 km (0.115 R)
• M45: 13,919,783 km (0.063 R)
• M46: 14,529,992 km (0.118 R)
• M47: 15,531,251 km (0.088 R)
• M48: 16,164,050 km (0.107 R)
• M49: 16,376,778 km (0.099 R)
• M50: 16,697,666 km (0.071 R)
• M51: 16,805,077 km (0.036 R)
• M52: 17,490,983 km (0.094 R)
• M53: 17,600,040 km (0.112 R)
• M54: 17,965,507 km (0.039 R)
• M55: 18,075,612 km (0.117 R)
• M56: 18,186,015 km (0.09 R)
• M57: 18,481,321 km (0.09 R)
• M58: 18,964,672 km (0.075 R)
• M59: 20,057,783 km (0.056 R)
• M60: 20,248,371 km (0.118 R)
• M61: 20,900,767 km (0.058 R)
• M62: 22,029,483 km (0.097 R)
• M63: 22,108,022 km (0.114 R)
• M64: 22,938,739 km (0.082 R)
• M65: 23,058,268 km (0.108 R)
• M66: 23,658,903 km (0.114 R)
• M67: 23,860,262 km (0.086 R)
• M68: 23,941,045 km (0.083 R)
• M69: 24,671,531 km (0.099 R)
• M70: 25,039,542 km (0.054 R)
• M71: 25,450,487 km (0.064 R)
• M72: 25,574,205 km (0.055 R)
• M73: 25,946,703 km (0.085 R)
• M74: 26,029,730 km (0.076 R)
• M75: 26,362,586 km (0.071 R)
• M76: 26,696,937 km (0.091 R)
• M77: 27,201,082 km (0.075 R)
• M78: 27,327,492 km (0.115 R)
• M79: 27,665,882 km (0.086 R)
• M80: 28,775,150 km (0.114 R)

Planet 5 - Gas Giant

Semi-Major Axis: 7.57 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 409.7

Radius: 11.1

Gravity: 3.33 G

Time & Orbit

Eccentricity (e): 0.073

Orbit Range: 7.02 AU - 8.12 AU

Year: 7975 Days

Day: 9.1 Hours

Environment

Temp: -174 °C

Axial Tilt: 66.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 53,304,874 km

• M1: 146,756 km (0.089 R)
• M2: 283,039 km (0.114 R)
• M3: 364,570 km (0.074 R)
• M4: 457,321 km (0.103 R)
• M5: 536,458 km (0.094 R)
• M6: 621,280 km (0.082 R)
• M7: 1,434,644 km (0.037 R)
• M8: 1,950,008 km (0.113 R)
• M9: 2,028,248 km (0.115 R)
• M10: 2,228,559 km (0.035 R)
• M11: 2,779,678 km (0.114 R)
• M12: 3,278,587 km (0.061 R)
• M13: 3,586,459 km (0.12 R)
• M14: 3,683,249 km (0.107 R)
• M15: 3,928,739 km (0.074 R)
• M16: 4,358,684 km (0.11 R)
• M17: 4,671,194 km (0.056 R)
• M18: 4,856,994 km (0.068 R)
• M19: 4,991,183 km (0.112 R)
• M20: 5,072,265 km (0.102 R)
• M21: 5,993,339 km (0.04 R)
• M22: 6,488,060 km (0.034 R)
• M23: 6,576,771 km (0.032 R)
• M24: 7,178,304 km (0.075 R)
• M25: 7,423,794 km (0.071 R)
• M26: 7,641,010 km (0.11 R)
• M27: 8,790,820 km (0.092 R)
• M28: 9,688,407 km (0.052 R)
• M29: 10,268,547 km (0.042 R)
• M30: 10,684,729 km (0.106 R)
• M31: 10,789,746 km (0.08 R)
• M32: 10,859,908 km (0.083 R)
• M33: 11,106,595 km (0.071 R)
• M34: 11,966,633 km (0.061 R)
• M35: 12,478,258 km (0.087 R)
• M36: 12,625,761 km (0.05 R)
• M37: 12,773,863 km (0.077 R)
• M38: 13,071,712 km (0.075 R)
• M39: 13,221,609 km (0.12 R)
• M40: 13,485,051 km (0.052 R)
• M41: 13,712,440 km (0.052 R)
• M42: 13,864,581 km (0.1 R)
• M43: 14,017,470 km (0.106 R)
• M44: 14,170,808 km (0.05 R)
• M45: 14,479,129 km (0.036 R)
• M46: 14,789,844 km (0.113 R)
• M47: 14,867,784 km (0.098 R)
• M48: 15,299,225 km (0.119 R)
• M49: 15,734,854 km (0.096 R)
• M50: 16,134,430 km (0.097 R)
• M51: 16,255,005 km (0.032 R)
• M52: 16,780,692 km (0.088 R)
• M53: 17,066,125 km (0.111 R)
• M54: 17,890,559 km (0.072 R)
• M55: 18,182,125 km (0.032 R)
• M56: 18,265,750 km (0.058 R)
• M57: 18,433,300 km (0.102 R)
• M58: 19,278,827 km (0.08 R)
• M59: 20,137,070 km (0.095 R)
• M60: 20,310,305 km (0.087 R)
• M61: 20,876,532 km (0.112 R)
• M62: 21,580,390 km (0.068 R)
• M63: 22,336,907 km (0.076 R)
• M64: 22,471,246 km (0.09 R)
• M65: 22,561,004 km (0.106 R)
• M66: 23,056,772 km (0.085 R)
• M67: 24,519,390 km (0.069 R)
• M68: 25,122,270 km (0.1 R)
• M69: 25,215,319 km (0.104 R)
• M70: 25,870,708 km (0.042 R)
• M71: 26,011,928 km (0.097 R)
• M72: 26,342,390 km (0.081 R)
• M73: 27,007,352 km (0.1 R)
• M74: 28,063,513 km (0.118 R)
• M75: 28,256,943 km (0.111 R)
• M76: 29,427,098 km (0.11 R)
• M77: 29,574,452 km (0.058 R)
• M78: 30,315,111 km (0.089 R)
• M79: 30,513,627 km (0.032 R)
• M80: 30,812,225 km (0.085 R)
• M81: 32,168,030 km (0.11 R)
• M82: 33,543,134 km (0.106 R)

Planet 6 - Gas Giant

Semi-Major Axis: 7.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 519.2

Radius: 11.1

Gravity: 4.21 G

Time & Orbit

Eccentricity (e): 0.043

Orbit Range: 7.54 AU - 8.22 AU

Year: 8470 Days

Day: 10.2 Hours

Environment

Temp: -164 °C

Axial Tilt: 49.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 53,304,874 km

• M1: 311,014 km (0.105 R)
• M2: 426,803 km (0.091 R)
• M3: 573,857 km (0.08 R)
• M4: 668,553 km (0.077 R)
• M5: 784,042 km (0.098 R)
• M6: 1,138,440 km (0.084 R)
• M7: 1,243,607 km (0.075 R)
• M8: 1,352,365 km (0.097 R)
• M9: 1,464,414 km (0.095 R)
• M10: 1,965,267 km (0.094 R)
• M11: 2,380,252 km (0.084 R)
• M12: 2,493,946 km (0.054 R)
• M13: 2,609,585 km (0.06 R)
• M14: 2,679,896 km (0.117 R)
• M15: 2,798,527 km (0.12 R)
• M16: 3,836,138 km (0.091 R)
• M17: 3,997,255 km (0.107 R)
• M18: 4,326,370 km (0.111 R)
• M19: 5,040,251 km (0.066 R)
• M20: 5,637,745 km (0.094 R)
• M21: 6,007,102 km (0.062 R)
• M22: 6,479,832 km (0.115 R)
• M23: 8,805,331 km (0.117 R)
• M24: 8,911,844 km (0.06 R)
• M25: 9,450,696 km (0.102 R)
• M26: 9,963,368 km (0.114 R)
• M27: 10,111,470 km (0.051 R)
• M28: 10,297,569 km (0.12 R)
• M29: 10,522,565 km (0.073 R)
• M30: 10,749,056 km (0.097 R)
• M31: 11,516,044 km (0.098 R)
• M32: 11,866,851 km (0.102 R)
• M33: 12,181,755 km (0.119 R)
• M34: 12,499,351 km (0.026 R)
• M35: 12,739,455 km (0.043 R)
• M36: 13,183,462 km (0.11 R)
• M37: 13,346,075 km (0.059 R)
• M38: 14,086,734 km (0.059 R)
• M39: 15,179,846 km (0.115 R)
• M40: 16,300,184 km (0.095 R)
• M41: 16,387,400 km (0.082 R)
• M42: 16,474,914 km (0.068 R)
• M43: 16,650,243 km (0.108 R)
• M44: 17,135,688 km (0.118 R)
• M45: 17,625,771 km (0.073 R)
• M46: 18,030,134 km (0.12 R)
• M47: 18,210,848 km (0.055 R)
• M48: 18,528,594 km (0.088 R)
• M49: 18,756,731 km (0.117 R)
• M50: 19,678,254 km (0.118 R)
• M51: 20,850,951 km (0.119 R)
• M52: 21,565,431 km (0.036 R)
• M53: 21,661,323 km (0.089 R)
• M54: 21,853,556 km (0.059 R)
• M55: 21,997,918 km (0.119 R)
• M56: 22,482,017 km (0.044 R)
• M57: 23,312,734 km (0.115 R)
• M58: 24,602,866 km (0.027 R)
• M59: 24,703,096 km (0.099 R)
• M60: 25,054,801 km (0.098 R)
• M61: 25,206,044 km (0.066 R)
• M62: 25,560,143 km (0.084 R)
• M63: 25,763,296 km (0.12 R)
• M64: 25,916,036 km (0.078 R)
• M65: 26,375,900 km (0.109 R)
• M66: 26,941,529 km (0.055 R)
• M67: 27,044,901 km (0.112 R)
• M68: 27,200,034 km (0.113 R)
• M69: 27,563,258 km (0.095 R)
• M70: 28,242,133 km (0.119 R)
• M71: 28,399,660 km (0.099 R)
• M72: 28,504,677 km (0.06 R)
• M73: 28,873,735 km (0.075 R)
• M74: 29,085,267 km (0.06 R)
• M75: 29,244,289 km (0.056 R)
• M76: 30,204,259 km (0.056 R)
• M77: 30,472,787 km (0.092 R)
• M78: 31,500,524 km (0.119 R)
• M79: 31,663,736 km (0.065 R)
• M80: 33,035,548 km (0.069 R)
• M81: 33,146,101 km (0.11 R)
• M82: 34,202,711 km (0.076 R)
• M83: 34,651,056 km (0.095 R)
• M84: 35,326,939 km (0.072 R)
• M85: 35,780,071 km (0.104 R)
• M86: 36,007,310 km (0.087 R)
• M87: 37,035,945 km (0.075 R)
• M88: 37,553,853 km (0.083 R)
• M89: 37,726,937 km (0.119 R)
• M90: 38,190,092 km (0.048 R)
• M91: 39,063,445 km (0.055 R)

Planet 7 - Gas Giant

Semi-Major Axis: 9.35 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 352

Radius: 13.4

Gravity: 1.96 G

Time & Orbit

Eccentricity (e): 0.243

Orbit Range: 7.08 AU - 11.62 AU

Year: 10947 Days

Day: 8.6 Hours

Environment

Temp: -185 °C

Axial Tilt: 46.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 53,304,874 km

• M1: 201,359 km (0.077 R)
• M2: 421,268 km (0.074 R)
• M3: 733,927 km (0.101 R)
• M4: 886,816 km (0.083 R)
• M5: 1,017,565 km (0.048 R)
• M6: 1,337,106 km (0.053 R)
• M7: 1,431,652 km (0.093 R)
• M8: 1,608,028 km (0.063 R)
• M9: 1,709,305 km (0.065 R)
• M10: 1,918,593 km (0.115 R)
• M11: 2,316,972 km (0.069 R)
• M12: 2,645,040 km (0.075 R)
• M13: 2,988,217 km (0.055 R)
• M14: 3,450,774 km (0.112 R)
• M15: 4,019,246 km (0.079 R)
• M16: 4,272,066 km (0.115 R)
• M17: 4,911,896 km (0.095 R)
• M18: 5,091,713 km (0.072 R)
• M19: 5,427,112 km (0.08 R)
• M20: 5,550,829 km (0.038 R)
• M21: 6,119,600 km (0.068 R)
• M22: 6,280,867 km (0.101 R)
• M23: 6,707,071 km (0.054 R)
• M24: 6,873,424 km (0.091 R)
• M25: 7,108,741 km (0.094 R)
• M26: 7,381,009 km (0.093 R)
• M27: 7,900,712 km (0.068 R)
• M28: 8,648,253 km (0.067 R)
• M29: 9,418,532 km (0.09 R)
• M30: 9,567,681 km (0.111 R)
• M31: 10,134,358 km (0.048 R)
• M32: 10,402,438 km (0.096 R)
• M33: 11,698,254 km (0.096 R)
• M34: 11,818,531 km (0.054 R)
• M35: 12,020,039 km (0.039 R)
• M36: 12,303,976 km (0.084 R)
• M37: 12,837,292 km (0.069 R)
• M38: 15,045,507 km (0.032 R)
• M39: 15,132,722 km (0.085 R)
• M40: 16,103,762 km (0.119 R)
• M41: 16,506,928 km (0.089 R)
• M42: 17,368,762 km (0.049 R)
• M43: 19,706,228 km (0.113 R)
• M44: 22,389,715 km (0.091 R)
• M45: 22,789,440 km (0.108 R)
• M46: 23,292,538 km (0.099 R)
• M47: 23,393,666 km (0.115 R)
• M48: 23,748,512 km (0.094 R)
• M49: 25,030,417 km (0.087 R)
• M50: 25,549,521 km (0.114 R)
• M51: 25,758,061 km (0.11 R)
• M52: 26,545,544 km (0.05 R)
• M53: 29,828,319 km (0.113 R)
• M54: 30,599,646 km (0.026 R)
• M55: 30,876,701 km (0.027 R)
• M56: 31,881,101 km (0.041 R)
• M57: 32,274,693 km (0.116 R)
• M58: 33,123,213 km (0.119 R)
• M59: 33,750,327 km (0.088 R)
• M60: 34,438,776 km (0.042 R)
• M61: 35,538,321 km (0.035 R)
• M62: 35,771,244 km (0.041 R)
• M63: 36,297,380 km (0.096 R)
• M64: 37,120,767 km (0.027 R)
• M65: 37,593,945 km (0.111 R)
• M66: 38,427,055 km (0.115 R)
• M67: 38,666,113 km (0.03 R)
• M68: 38,785,791 km (0.088 R)
• M69: 39,386,427 km (0.065 R)
• M70: 39,869,179 km (0.042 R)

Planet 8 - Ice Giant

Semi-Major Axis: 12.47 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 331.4

Radius: 5.1

Gravity: 12.74 G

Time & Orbit

Eccentricity (e): 0.016

Orbit Range: 12.27 AU - 12.67 AU

Year: 16860 Days

Day: 19.5 Hours

Environment

Temp: -191 °C

Axial Tilt: 23.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 53,304,874 km

• M1: 101,577 km (0.103 R)
• M2: 171,140 km (0.066 R)
• M3: 202,855 km (0.098 R)
• M4: 640,877 km (0.106 R)
• M5: 712,983 km (0.083 R)
• M6: 1,406,220 km (0.108 R)
• M7: 1,453,343 km (0.062 R)
• M8: 1,823,448 km (0.115 R)
• M9: 2,059,065 km (0.082 R)
• M10: 2,388,180 km (0.115 R)
• M11: 2,501,576 km (0.06 R)
• M12: 3,599,474 km (0.116 R)
• M13: 3,795,298 km (0.113 R)
• M14: 4,265,634 km (0.081 R)
• M15: 7,162,596 km (0.116 R)
• M16: 9,341,938 km (0.116 R)
• M17: 10,019,168 km (0.035 R)
• M18: 10,618,606 km (0.045 R)
• M19: 10,805,454 km (0.116 R)
• M20: 11,372,430 km (0.112 R)
• M21: 12,046,069 km (0.069 R)
• M22: 12,633,690 km (0.101 R)
• M23: 12,831,608 km (0.1 R)
• M24: 12,931,090 km (0.072 R)
• M25: 13,030,573 km (0.084 R)
• M26: 13,330,965 km (0.074 R)
• M27: 13,381,380 km (0.098 R)
• M28: 13,735,179 km (0.106 R)
• M29: 13,887,619 km (0.112 R)
• M30: 14,245,906 km (0.119 R)
• M31: 14,814,827 km (0.116 R)
• M32: 15,128,234 km (0.095 R)
• M33: 15,708,674 km (0.095 R)
• M34: 15,761,781 km (0.066 R)
• M35: 16,242,589 km (0.072 R)
• M36: 16,350,150 km (0.1 R)
• M37: 16,565,870 km (0.109 R)
• M38: 16,619,875 km (0.06 R)
• M39: 17,218,715 km (0.102 R)
• M40: 17,879,788 km (0.098 R)
• M41: 18,269,341 km (0.039 R)
• M42: 18,549,238 km (0.057 R)
• M43: 19,797,782 km (0.09 R)
• M44: 20,200,799 km (0.066 R)
• M45: 20,548,315 km (0.1 R)
• M46: 20,606,359 km (0.066 R)
• M47: 21,249,330 km (0.093 R)
• M48: 21,366,914 km (0.073 R)
• M49: 21,543,589 km (0.064 R)
• M50: 21,780,104 km (0.102 R)
• M51: 22,375,054 km (0.078 R)
• M52: 22,734,688 km (0.111 R)
• M53: 23,156,554 km (0.063 R)
• M54: 23,216,991 km (0.091 R)
• M55: 23,459,489 km (0.062 R)
• M56: 23,885,694 km (0.057 R)
• M57: 24,253,106 km (0.057 R)
• M58: 25,242,098 km (0.106 R)
• M59: 25,992,480 km (0.079 R)
• M60: 26,118,143 km (0.071 R)
• M61: 26,433,495 km (0.072 R)
• M62: 27,387,032 km (0.084 R)
• M63: 28,610,742 km (0.102 R)
• M64: 29,392,840 km (0.07 R)
• M65: 30,844,837 km (0.056 R)
• M66: 31,445,622 km (0.11 R)
• M67: 32,590,794 km (0.076 R)
• M68: 32,862,164 km (0.056 R)
• M69: 32,998,149 km (0.039 R)
• M70: 33,749,579 km (0.102 R)
• M71: 33,818,095 km (0.107 R)
• M72: 34,024,241 km (0.106 R)
• M73: 35,199,481 km (0.103 R)
• M74: 35,617,607 km (0.086 R)
• M75: 36,740,190 km (0.078 R)
• M76: 37,589,906 km (0.101 R)
• M77: 37,945,799 km (0.084 R)
• M78: 40,032,091 km (0.075 R)
• M79: 40,614,176 km (0.068 R)
• M80: 40,687,180 km (0.098 R)
• M81: 42,081,582 km (0.115 R)
• M82: 43,119,043 km (0.079 R)
• M83: 43,715,639 km (0.066 R)
• M84: 44,615,620 km (0.097 R)
• M85: 44,766,265 km (0.102 R)
• M86: 46,281,542 km (0.107 R)
• M87: 46,739,312 km (0.091 R)
• M88: 46,968,795 km (0.094 R)
• M89: 49,128,838 km (0.054 R)
• M90: 51,873,810 km (0.118 R)
• M91: 52,032,234 km (0.076 R)

Kuiper Belt

Range: 30 - 48 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 478 - 11,212 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit