🌌 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: 450

Radius: 14.4

Gravity: 2.17 G

Time & Orbit

Eccentricity (e): 0.169

Orbit Range: 0.72 AU - 1.02 AU

Year: 516 Days

Day: 6.2 Hours

Environment

Temp: -156 °C

Axial Tilt: 13.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 28,326,189 km

• M1: 181,612 km (0.104 R)
• M2: 280,496 km (0.102 R)
• M3: 426,354 km (0.086 R)
• M4: 527,183 km (0.072 R)
• M5: 672,143 km (0.045 R)
• M6: 776,263 km (0.098 R)
• M7: 866,022 km (0.113 R)
• M8: 1,048,531 km (0.097 R)
• M9: 1,140,235 km (0.096 R)
• M10: 1,239,867 km (0.07 R)
• M11: 1,387,819 km (0.096 R)
• M12: 1,505,403 km (0.059 R)
• M13: 1,702,274 km (0.074 R)
• M14: 2,034,232 km (0.079 R)
• M15: 2,133,864 km (0.114 R)
• M16: 2,253,243 km (0.117 R)
• M17: 2,499,032 km (0.032 R)
• M18: 2,625,293 km (0.064 R)
• M19: 2,825,455 km (0.079 R)
• M20: 2,930,772 km (0.047 R)
• M21: 3,310,002 km (0.115 R)
• M22: 3,463,340 km (0.099 R)
• M23: 3,612,041 km (0.114 R)
• M24: 3,719,601 km (0.107 R)
• M25: 4,033,907 km (0.11 R)
• M26: 4,175,725 km (0.118 R)
• M27: 4,395,185 km (0.112 R)
• M28: 4,572,160 km (0.116 R)
• M29: 4,665,359 km (0.097 R)
• M30: 4,901,275 km (0.109 R)
• M31: 5,141,230 km (0.059 R)
• M32: 5,270,782 km (0.092 R)
• M33: 5,641,186 km (0.07 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 65

Radius: 10.9

Gravity: 0.55 G

Time & Orbit

Eccentricity (e): 0.229

Orbit Range: 0.79 AU - 1.25 AU

Year: 655 Days

Day: 13.1 Hours

Environment

Temp: -158 °C

Axial Tilt: 39 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (25)

Outer Limit: 28,326,189 km

• M1: 138,976 km (0.041 R)
• M2: 230,830 km (0.096 R)
• M3: 350,209 km (0.102 R)
• M4: 560,094 km (0.103 R)
• M5: 680,222 km (0.098 R)
• M6: 974,181 km (0.102 R)
• M7: 1,109,119 km (0.104 R)
• M8: 1,198,129 km (0.119 R)
• M9: 1,329,177 km (0.096 R)
• M10: 1,625,381 km (0.085 R)
• M11: 1,739,524 km (0.062 R)
• M12: 2,026,303 km (0.116 R)
• M13: 2,115,314 km (0.111 R)
• M14: 2,288,698 km (0.051 R)
• M15: 2,372,622 km (0.075 R)
• M16: 2,475,845 km (0.117 R)
• M17: 2,635,765 km (0.051 R)
• M18: 2,719,240 km (0.045 R)
• M19: 2,803,763 km (0.053 R)
• M20: 2,879,609 km (0.097 R)
• M21: 2,956,204 km (0.101 R)
• M22: 3,087,102 km (0.101 R)
• M23: 3,264,525 km (0.089 R)
• M24: 3,415,020 km (0.112 R)
• M25: 3,496,252 km (0.034 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.31 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 274.2

Radius: 13.8

Gravity: 1.44 G

Time & Orbit

Eccentricity (e): 0.08

Orbit Range: 1.21 AU - 1.41 AU

Year: 953 Days

Day: 8.8 Hours

Environment

Temp: -178 °C

Axial Tilt: 28.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 28,326,189 km

• M1: 201,808 km (0.109 R)
• M2: 307,872 km (0.08 R)
• M3: 427,252 km (0.037 R)
• M4: 544,835 km (0.043 R)
• M5: 721,511 km (0.062 R)
• M6: 815,608 km (0.107 R)
• M7: 940,073 km (0.069 R)
• M8: 1,055,563 km (0.099 R)
• M9: 1,198,728 km (0.056 R)
• M10: 1,296,116 km (0.104 R)
• M11: 1,444,667 km (0.103 R)
• M12: 1,605,484 km (0.102 R)
• M13: 1,752,838 km (0.1 R)
• M14: 1,871,619 km (0.094 R)
• M15: 2,006,855 km (0.1 R)
• M16: 2,110,527 km (0.087 R)
• M17: 2,201,931 km (0.094 R)
• M18: 2,316,224 km (0.054 R)
• M19: 2,410,770 km (0.086 R)
• M20: 2,543,762 km (0.101 R)
• M21: 2,763,372 km (0.079 R)
• M22: 2,973,557 km (0.079 R)
• M23: 3,237,747 km (0.073 R)
• M24: 3,327,505 km (0.104 R)
• M25: 3,526,471 km (0.099 R)
• M26: 3,746,529 km (0.092 R)
• M27: 3,910,189 km (0.107 R)
• M28: 4,014,908 km (0.083 R)
• M29: 4,155,829 km (0.106 R)
• M30: 4,552,263 km (0.042 R)
• M31: 4,662,517 km (0.056 R)
• M32: 4,764,543 km (0.034 R)
• M33: 4,989,388 km (0.104 R)
• M34: 5,122,231 km (0.085 R)
• M35: 5,256,271 km (0.108 R)
• M36: 5,498,619 km (0.111 R)
• M37: 5,665,571 km (0.038 R)
• M38: 5,904,179 km (0.098 R)
• M39: 6,309,141 km (0.08 R)
• M40: 6,422,237 km (0.093 R)
• M41: 6,556,575 km (0.054 R)
• M42: 7,167,832 km (0.116 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.34 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 484

Radius: 10

Gravity: 4.84 G

Time & Orbit

Eccentricity (e): 0.13

Orbit Range: 1.17 AU - 1.51 AU

Year: 986 Days

Day: 13.1 Hours

Environment

Temp: -172 °C

Axial Tilt: 14.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (54)

Outer Limit: 28,326,189 km

• M1: 151,692 km (0.11 R)
• M2: 240,254 km (0.093 R)
• M3: 327,769 km (0.09 R)
• M4: 391,797 km (0.032 R)
• M5: 531,222 km (0.086 R)
• M6: 620,682 km (0.116 R)
• M7: 683,513 km (0.079 R)
• M8: 828,024 km (0.105 R)
• M9: 928,404 km (0.034 R)
• M10: 1,109,418 km (0.112 R)
• M11: 1,322,894 km (0.105 R)
• M12: 1,385,426 km (0.119 R)
• M13: 1,586,635 km (0.089 R)
• M14: 1,766,751 km (0.107 R)
• M15: 1,851,722 km (0.105 R)
• M16: 1,961,826 km (0.091 R)
• M17: 2,139,250 km (0.089 R)
• M18: 2,255,038 km (0.033 R)
• M19: 2,330,585 km (0.05 R)
• M20: 2,415,557 km (0.075 R)
• M21: 2,579,815 km (0.108 R)
• M22: 2,792,693 km (0.06 R)
• M23: 3,011,555 km (0.047 R)
• M24: 3,104,305 km (0.114 R)
• M25: 3,475,607 km (0.111 R)
• M26: 3,563,272 km (0.06 R)
• M27: 3,851,098 km (0.068 R)
• M28: 4,177,371 km (0.09 R)
• M29: 4,291,664 km (0.064 R)
• M30: 4,512,620 km (0.094 R)
• M31: 4,694,381 km (0.107 R)
• M32: 4,988,042 km (0.114 R)
• M33: 5,065,085 km (0.057 R)
• M34: 5,433,993 km (0.086 R)
• M35: 5,696,388 km (0.083 R)
• M36: 5,777,021 km (0.104 R)
• M37: 5,904,628 km (0.096 R)
• M38: 6,056,619 km (0.109 R)
• M39: 6,197,989 km (0.117 R)
• M40: 6,472,202 km (0.12 R)
• M41: 6,665,184 km (0.119 R)
• M42: 6,738,187 km (0.072 R)
• M43: 7,057,130 km (0.106 R)
• M44: 7,318,328 km (0.117 R)
• M45: 7,381,009 km (0.115 R)
• M46: 7,570,251 km (0.077 R)
• M47: 7,646,246 km (0.077 R)
• M48: 7,786,569 km (0.051 R)
• M49: 7,850,597 km (0.088 R)
• M50: 7,914,775 km (0.081 R)
• M51: 8,303,579 km (0.059 R)
• M52: 8,566,273 km (0.09 R)
• M53: 8,632,396 km (0.1 R)
• M54: 9,032,570 km (0.116 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 499.6

Radius: 14.4

Gravity: 2.41 G

Time & Orbit

Eccentricity (e): 0.168

Orbit Range: 1.66 AU - 2.32 AU

Year: 1785 Days

Day: 7.7 Hours

Environment

Temp: -198 °C

Axial Tilt: 33.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (64)

Outer Limit: 28,326,189 km

• M1: 185,352 km (0.112 R)
• M2: 303,684 km (0.11 R)
• M3: 467,493 km (0.085 R)
• M4: 586,872 km (0.073 R)
• M5: 782,846 km (0.099 R)
• M6: 878,588 km (0.1 R)
• M7: 1,002,755 km (0.091 R)
• M8: 1,227,151 km (0.092 R)
• M9: 1,368,372 km (0.088 R)
• M10: 1,562,550 km (0.108 R)
• M11: 1,796,072 km (0.111 R)
• M12: 1,917,246 km (0.113 R)
• M13: 2,309,043 km (0.083 R)
• M14: 2,531,645 km (0.067 R)
• M15: 2,634,119 km (0.099 R)
• M16: 2,761,427 km (0.034 R)
• M17: 2,878,861 km (0.072 R)
• M18: 2,974,155 km (0.119 R)
• M19: 3,180,301 km (0.091 R)
• M20: 3,671,132 km (0.115 R)
• M21: 3,879,671 km (0.109 R)
• M22: 4,105,414 km (0.026 R)
• M23: 4,294,805 km (0.107 R)
• M24: 4,431,837 km (0.081 R)
• M25: 4,752,575 km (0.103 R)
• M26: 4,865,970 km (0.118 R)
• M27: 4,965,901 km (0.057 R)
• M28: 5,066,581 km (0.092 R)
• M29: 5,168,008 km (0.073 R)
• M30: 5,402,278 km (0.079 R)
• M31: 5,505,950 km (0.105 R)
• M32: 5,640,139 km (0.045 R)
• M33: 6,187,966 km (0.062 R)
• M34: 6,374,515 km (0.086 R)
• M35: 6,705,425 km (0.108 R)
• M36: 6,913,067 km (0.031 R)
• M37: 7,285,715 km (0.092 R)
• M38: 7,449,824 km (0.097 R)
• M39: 7,681,701 km (0.119 R)
• M40: 7,781,932 km (0.089 R)
• M41: 8,118,676 km (0.116 R)
• M42: 8,220,702 km (0.098 R)
• M43: 8,494,915 km (0.1 R)
• M44: 8,964,353 km (0.113 R)
• M45: 9,158,082 km (0.084 R)
• M46: 9,442,318 km (0.075 R)
• M47: 9,603,585 km (0.065 R)
• M48: 9,892,458 km (0.1 R)
• M49: 10,147,523 km (0.09 R)
• M50: 10,590,033 km (0.045 R)
• M51: 10,757,583 km (0.12 R)
• M52: 11,038,827 km (0.097 R)
• M53: 11,152,072 km (0.066 R)
• M54: 11,303,615 km (0.076 R)
• M55: 11,417,609 km (0.053 R)
• M56: 11,646,942 km (0.107 R)
• M57: 11,820,027 km (0.106 R)
• M58: 12,168,590 km (0.088 R)
• M59: 12,363,815 km (0.103 R)
• M60: 12,895,935 km (0.084 R)
• M61: 13,055,107 km (0.062 R)
• M62: 13,234,924 km (0.115 R)
• M63: 13,375,246 km (0.07 R)
• M64: 13,677,883 km (0.115 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 862.4

Radius: 12.3

Gravity: 5.7 G

Time & Orbit

Eccentricity (e): 0.242

Orbit Range: 2.27 AU - 3.73 AU

Year: 3304 Days

Day: 13.3 Hours

Environment

Temp: -209 °C

Axial Tilt: 44.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 28,326,189 km

• M1: 222,452 km (0.093 R)
• M2: 300,393 km (0.095 R)
• M3: 419,622 km (0.103 R)
• M4: 560,394 km (0.065 R)
• M5: 838,945 km (0.11 R)
• M6: 1,213,388 km (0.115 R)
• M7: 1,952,551 km (0.098 R)
• M8: 2,286,005 km (0.043 R)
• M9: 2,401,345 km (0.061 R)
• M10: 2,501,725 km (0.1 R)
• M11: 2,689,620 km (0.072 R)
• M12: 2,776,536 km (0.087 R)
• M13: 3,061,371 km (0.077 R)
• M14: 3,170,577 km (0.086 R)
• M15: 3,449,577 km (0.077 R)
• M16: 3,601,718 km (0.08 R)
• M17: 3,834,193 km (0.101 R)
• M18: 4,031,812 km (0.084 R)
• M19: 4,334,449 km (0.068 R)
• M20: 4,623,771 km (0.096 R)
• M21: 4,707,546 km (0.095 R)
• M22: 4,813,012 km (0.102 R)
• M23: 4,897,984 km (0.105 R)
• M24: 5,396,444 km (0.12 R)
• M25: 6,002,465 km (0.045 R)
• M26: 6,891,824 km (0.082 R)
• M27: 7,230,065 km (0.066 R)
• M28: 7,425,739 km (0.099 R)
• M29: 8,073,797 km (0.064 R)
• M30: 8,974,825 km (0.095 R)
• M31: 9,106,172 km (0.056 R)
• M32: 9,211,638 km (0.101 R)
• M33: 9,317,703 km (0.049 R)
• M34: 9,530,731 km (0.11 R)
• M35: 9,907,568 km (0.084 R)
• M36: 10,261,965 km (0.08 R)
• M37: 10,399,446 km (0.097 R)
• M38: 10,955,202 km (0.093 R)
• M39: 12,008,819 km (0.069 R)
• M40: 12,270,017 km (0.078 R)
• M41: 12,946,200 km (0.046 R)
• M42: 13,035,210 km (0.098 R)
• M43: 13,213,980 km (0.112 R)
• M44: 13,846,181 km (0.093 R)
• M45: 13,937,286 km (0.094 R)
• M46: 14,211,798 km (0.097 R)
• M47: 14,580,706 km (0.104 R)
• M48: 15,046,255 km (0.119 R)
• M49: 15,140,053 km (0.096 R)
• M50: 15,327,947 km (0.099 R)
• M51: 15,516,740 km (0.118 R)
• M52: 16,279,539 km (0.077 R)
• M53: 16,730,128 km (0.11 R)
• M54: 17,184,906 km (0.079 R)
• M55: 17,974,035 km (0.089 R)
• M56: 18,106,578 km (0.089 R)
• M57: 18,674,153 km (0.093 R)
• M58: 18,842,151 km (0.116 R)
• M59: 19,044,407 km (0.096 R)
• M60: 19,213,603 km (0.082 R)
• M61: 19,349,138 km (0.099 R)
• M62: 19,723,881 km (0.075 R)
• M63: 19,929,279 km (0.098 R)
• M64: 20,101,017 km (0.119 R)
• M65: 20,273,204 km (0.085 R)
• M66: 20,411,433 km (0.114 R)
• M67: 20,723,344 km (0.038 R)
• M68: 21,106,764 km (0.11 R)
• M69: 21,386,960 km (0.077 R)
• M70: 22,164,271 km (0.119 R)
• M71: 22,413,501 km (0.071 R)
• M72: 22,807,093 km (0.109 R)
• M73: 23,275,185 km (0.045 R)
• M74: 23,456,049 km (0.117 R)
• M75: 23,601,009 km (0.088 R)
• M76: 24,587,906 km (0.103 R)

Planet 7 - Ice Giant

Semi-Major Axis: 10.53 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 71.8

Radius: 3

Gravity: 7.98 G

Time & Orbit

Eccentricity (e): 0.056

Orbit Range: 9.94 AU - 11.12 AU

Year: 21726 Days

Day: 24.5 Hours

Environment

Temp: -225 °C

Axial Tilt: 37.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (67)

Outer Limit: 28,326,189 km

• M1: 525,837 km (0.113 R)
• M2: 552,764 km (0.103 R)
• M3: 622,028 km (0.118 R)
• M4: 815,159 km (0.058 R)
• M5: 975,827 km (0.09 R)
• M6: 1,344,436 km (0.039 R)
• M7: 1,915,900 km (0.073 R)
• M8: 2,438,445 km (0.05 R)
• M9: 2,529,700 km (0.081 R)
• M10: 2,762,474 km (0.12 R)
• M11: 2,809,897 km (0.095 R)
• M12: 2,905,490 km (0.106 R)
• M13: 4,079,384 km (0.057 R)
• M14: 4,214,920 km (0.099 R)
• M15: 4,269,523 km (0.092 R)
• M16: 4,574,104 km (0.099 R)
• M17: 4,602,079 km (0.085 R)
• M18: 5,439,678 km (0.115 R)
• M19: 5,648,666 km (0.074 R)
• M20: 6,074,721 km (0.054 R)
• M21: 6,893,171 km (0.036 R)
• M22: 7,712,069 km (0.095 R)
• M23: 7,778,940 km (0.119 R)
• M24: 8,115,984 km (0.061 R)
• M25: 9,226,149 km (0.057 R)
• M26: 10,052,977 km (0.034 R)
• M27: 10,089,479 km (0.118 R)
• M28: 10,791,093 km (0.083 R)
• M29: 13,147,409 km (0.079 R)
• M30: 14,526,701 km (0.107 R)
• M31: 14,941,087 km (0.109 R)
• M32: 16,036,443 km (0.116 R)
• M33: 16,550,760 km (0.074 R)
• M34: 16,896,481 km (0.085 R)
• M35: 17,727,348 km (0.048 R)
• M36: 18,660,988 km (0.055 R)
• M37: 18,795,776 km (0.06 R)
• M38: 19,020,920 km (0.078 R)
• M39: 19,701,890 km (0.057 R)
• M40: 19,884,699 km (0.085 R)
• M41: 19,976,402 km (0.066 R)
• M42: 20,068,255 km (0.107 R)
• M43: 20,854,242 km (0.074 R)
• M44: 22,028,436 km (0.085 R)
• M45: 22,313,420 km (0.063 R)
• M46: 23,320,513 km (0.112 R)
• M47: 23,805,210 km (0.1 R)
• M48: 23,853,829 km (0.085 R)
• M49: 24,097,674 km (0.081 R)
• M50: 24,146,443 km (0.089 R)
• M51: 24,489,321 km (0.068 R)
• M52: 24,784,478 km (0.105 R)
• M53: 25,130,498 km (0.074 R)
• M54: 25,727,094 km (0.074 R)
• M55: 26,027,187 km (0.076 R)
• M56: 29,717,168 km (0.096 R)
• M57: 30,189,897 km (0.053 R)
• M58: 30,717,978 km (0.075 R)
• M59: 31,462,377 km (0.051 R)
• M60: 33,676,276 km (0.082 R)
• M61: 34,553,817 km (0.09 R)
• M62: 34,719,123 km (0.105 R)
• M63: 35,884,041 km (0.108 R)
• M64: 36,051,591 km (0.053 R)
• M65: 36,387,288 km (0.111 R)
• M66: 36,555,436 km (0.069 R)
• M67: 37,400,515 km (0.052 R)

Planet 8 - Ice Giant

Semi-Major Axis: 11.29 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 24.3

Radius: 3.9

Gravity: 1.6 G

Time & Orbit

Eccentricity (e): 0.133

Orbit Range: 9.79 AU - 12.79 AU

Year: 24120 Days

Day: 22.3 Hours

Environment

Temp: -225 °C

Axial Tilt: 23.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (54)

Outer Limit: 28,326,189 km

• M1: 274,662 km (0.1 R)
• M2: 355,145 km (0.028 R)
• M3: 393,592 km (0.081 R)
• M4: 549,922 km (0.064 R)
• M5: 700,417 km (0.089 R)
• M6: 889,659 km (0.112 R)
• M7: 956,230 km (0.085 R)
• M8: 983,307 km (0.108 R)
• M9: 1,024,446 km (0.088 R)
• M10: 1,373,907 km (0.057 R)
• M11: 1,691,354 km (0.116 R)
• M12: 1,774,081 km (0.103 R)
• M13: 2,673,164 km (0.113 R)
• M14: 2,731,059 km (0.114 R)
• M15: 2,867,492 km (0.075 R)
• M16: 3,026,365 km (0.105 R)
• M17: 3,147,390 km (0.063 R)
• M18: 3,604,411 km (0.1 R)
• M19: 5,071,667 km (0.095 R)
• M20: 6,232,995 km (0.038 R)
• M21: 6,542,214 km (0.109 R)
• M22: 6,620,304 km (0.106 R)
• M23: 6,646,334 km (0.076 R)
• M24: 7,015,243 km (0.112 R)
• M25: 7,663,151 km (0.065 R)
• M26: 7,883,359 km (0.075 R)
• M27: 7,938,710 km (0.075 R)
• M28: 8,641,671 km (0.12 R)
• M29: 9,481,812 km (0.113 R)
• M30: 9,777,418 km (0.1 R)
• M31: 10,016,176 km (0.087 R)
• M32: 10,166,372 km (0.05 R)
• M33: 10,590,931 km (0.087 R)
• M34: 11,052,141 km (0.069 R)
• M35: 11,740,291 km (0.093 R)
• M36: 12,603,770 km (0.081 R)
• M37: 14,560,660 km (0.113 R)
• M38: 14,764,861 km (0.076 R)
• M39: 14,901,593 km (0.091 R)
• M40: 15,974,958 km (0.119 R)
• M41: 16,045,120 km (0.085 R)
• M42: 16,185,592 km (0.073 R)
• M43: 16,574,247 km (0.071 R)
• M44: 16,751,820 km (0.11 R)
• M45: 18,747,007 km (0.094 R)
• M46: 19,006,260 km (0.043 R)
• M47: 20,092,939 km (0.106 R)
• M48: 20,815,796 km (0.045 R)
• M49: 21,353,899 km (0.095 R)
• M50: 23,431,963 km (0.039 R)
• M51: 23,511,549 km (0.072 R)
• M52: 26,605,084 km (0.084 R)
• M53: 27,608,137 km (0.111 R)
• M54: 28,241,385 km (0.085 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: 484 - 20,361 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit