🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.9 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.97

Radius: 1.55

Gravity: 1.24 G

Time & Orbit

Eccentricity (e): 0.125

Orbit Range: 0.79 AU - 1.01 AU

Year: 323 Days

Day: 44.8 Hours

Environment

Temp: 13 °C

Axial Tilt: 9.2 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (1)

Outer Limit: 68,170,185 km

• M1: 47,273 km (0.032 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.94 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.81

Radius: 1.51

Gravity: 1.23 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 0.74 AU - 1.14 AU

Year: 345 Days

Day: 15.3 Hours

Environment

Temp: 19 °C

Axial Tilt: 38.7 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 3 - Terrestrial

Semi-Major Axis: 1.03 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.81

Radius: 1.87

Gravity: 1.38 G

Time & Orbit

Eccentricity (e): 0.015

Orbit Range: 1.01 AU - 1.05 AU

Year: 396 Days

Day: 15.6 Hours

Environment

Temp: 10 °C

Axial Tilt: 47.6 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (1)

Outer Limit: 68,170,185 km

• M1: 978,520 km (0.059 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 490.9

Radius: 10.1

Gravity: 4.81 G

Time & Orbit

Eccentricity (e): 0.238

Orbit Range: 3.53 AU - 5.73 AU

Year: 3773 Days

Day: 5 Hours

Environment

Temp: -150 °C

Axial Tilt: 28.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 68,170,185 km

• M1: 131,197 km (0.089 R)
• M2: 235,617 km (0.098 R)
• M3: 317,297 km (0.091 R)
• M4: 412,890 km (0.104 R)
• M5: 767,437 km (0.067 R)
• M6: 1,028,485 km (0.114 R)
• M7: 1,368,073 km (0.117 R)
• M8: 1,631,963 km (0.114 R)
• M9: 1,714,392 km (0.105 R)
• M10: 1,812,378 km (0.05 R)
• M11: 2,132,667 km (0.079 R)
• M12: 2,268,951 km (0.096 R)
• M13: 2,534,487 km (0.067 R)
• M14: 2,943,189 km (0.102 R)
• M15: 3,078,425 km (0.038 R)
• M16: 3,337,528 km (0.109 R)
• M17: 3,550,107 km (0.087 R)
• M18: 4,290,467 km (0.103 R)
• M19: 4,521,745 km (0.044 R)
• M20: 4,916,534 km (0.052 R)
• M21: 5,179,078 km (0.116 R)
• M22: 5,363,532 km (0.106 R)
• M23: 5,467,054 km (0.064 R)
• M24: 5,802,453 km (0.091 R)
• M25: 5,866,181 km (0.032 R)
• M26: 5,930,060 km (0.091 R)
• M27: 6,101,648 km (0.059 R)
• M28: 6,471,604 km (0.049 R)
• M29: 6,826,600 km (0.118 R)
• M30: 7,051,744 km (0.075 R)
• M31: 7,370,986 km (0.053 R)
• M32: 7,601,965 km (0.097 R)
• M33: 8,549,668 km (0.053 R)
• M34: 8,963,755 km (0.078 R)
• M35: 10,142,436 km (0.074 R)
• M36: 10,270,642 km (0.107 R)
• M37: 10,946,226 km (0.111 R)
• M38: 11,104,201 km (0.102 R)
• M39: 11,369,289 km (0.105 R)
• M40: 11,475,802 km (0.078 R)
• M41: 11,582,765 km (0.101 R)
• M42: 11,743,732 km (0.072 R)
• M43: 12,094,988 km (0.098 R)
• M44: 12,477,360 km (0.061 R)
• M45: 12,670,042 km (0.094 R)
• M46: 12,863,622 km (0.11 R)
• M47: 13,058,249 km (0.08 R)
• M48: 13,337,997 km (0.094 R)
• M49: 13,676,237 km (0.075 R)
• M50: 13,931,751 km (0.049 R)
• M51: 14,074,467 km (0.054 R)
• M52: 14,160,336 km (0.03 R)
• M53: 14,534,331 km (0.03 R)
• M54: 14,678,992 km (0.101 R)
• M55: 14,853,273 km (0.094 R)
• M56: 15,028,303 km (0.032 R)
• M57: 15,883,704 km (0.103 R)
• M58: 16,092,542 km (0.091 R)
• M59: 16,212,220 km (0.12 R)
• M60: 16,573,350 km (0.034 R)
• M61: 16,906,654 km (0.055 R)
• M62: 17,272,720 km (0.085 R)
• M63: 18,075,013 km (0.044 R)
• M64: 18,449,307 km (0.081 R)
• M65: 18,763,313 km (0.103 R)
• M66: 19,396,411 km (0.114 R)
• M67: 20,165,494 km (0.054 R)
• M68: 20,230,120 km (0.12 R)
• M69: 20,716,313 km (0.068 R)
• M70: 20,781,388 km (0.1 R)
• M71: 20,944,599 km (0.065 R)
• M72: 21,272,069 km (0.078 R)
• M73: 21,535,361 km (0.105 R)
• M74: 21,733,429 km (0.109 R)
• M75: 22,331,521 km (0.066 R)

Planet 5 - Gas Giant

Semi-Major Axis: 6.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 577.6

Radius: 14.6

Gravity: 2.71 G

Time & Orbit

Eccentricity (e): 0.133

Orbit Range: 5.95 AU - 7.77 AU

Year: 6805 Days

Day: 14 Hours

Environment

Temp: -171 °C

Axial Tilt: 35 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 68,170,185 km

• M1: 206,445 km (0.115 R)
• M2: 449,990 km (0.064 R)
• M3: 706,700 km (0.091 R)
• M4: 1,170,005 km (0.094 R)
• M5: 1,333,665 km (0.065 R)
• M6: 1,505,553 km (0.053 R)
• M7: 1,777,671 km (0.069 R)
• M8: 1,891,216 km (0.091 R)
• M9: 2,026,902 km (0.084 R)
• M10: 2,370,528 km (0.094 R)
• M11: 2,475,246 km (0.076 R)
• M12: 2,754,994 km (0.111 R)
• M13: 3,090,991 km (0.067 R)
• M14: 3,182,844 km (0.088 R)
• M15: 3,369,393 km (0.045 R)
• M16: 3,535,596 km (0.101 R)
• M17: 3,704,791 km (0.051 R)
• M18: 3,876,530 km (0.119 R)
• M19: 4,101,525 km (0.071 R)
• M20: 4,228,384 km (0.09 R)
• M21: 5,044,291 km (0.102 R)
• M22: 5,879,944 km (0.045 R)
• M23: 6,081,303 km (0.081 R)
• M24: 6,372,720 km (0.109 R)
• M25: 6,549,993 km (0.118 R)
• M26: 6,698,843 km (0.064 R)
• M27: 6,879,108 km (0.079 R)
• M28: 7,275,094 km (0.113 R)
• M29: 7,553,645 km (0.097 R)
• M30: 7,647,294 km (0.073 R)
• M31: 7,867,352 km (0.075 R)
• M32: 8,540,094 km (0.093 R)
• M33: 8,768,380 km (0.067 R)
• M34: 9,065,033 km (0.071 R)
• M35: 10,043,552 km (0.119 R)
• M36: 10,808,147 km (0.03 R)
• M37: 11,304,513 km (0.118 R)
• M38: 11,881,063 km (0.062 R)
• M39: 12,026,622 km (0.09 R)
• M40: 12,467,187 km (0.085 R)
• M41: 14,320,555 km (0.072 R)
• M42: 14,514,434 km (0.106 R)
• M43: 14,631,270 km (0.026 R)
• M44: 14,983,573 km (0.099 R)
• M45: 15,180,444 km (0.088 R)
• M46: 15,457,499 km (0.094 R)
• M47: 15,576,878 km (0.117 R)
• M48: 15,736,350 km (0.066 R)
• M49: 16,339,528 km (0.106 R)
• M50: 16,868,357 km (0.103 R)
• M51: 17,859,443 km (0.092 R)
• M52: 18,404,278 km (0.071 R)
• M53: 18,615,211 km (0.109 R)
• M54: 18,869,527 km (0.104 R)
• M55: 19,124,891 km (0.086 R)
• M56: 19,467,321 km (0.092 R)
• M57: 19,682,293 km (0.064 R)
• M58: 20,900,917 km (0.116 R)
• M59: 21,875,397 km (0.111 R)
• M60: 22,323,293 km (0.116 R)
• M61: 23,000,822 km (0.073 R)
• M62: 23,228,211 km (0.119 R)
• M63: 23,593,529 km (0.108 R)
• M64: 23,776,936 km (0.109 R)
• M65: 23,914,865 km (0.104 R)
• M66: 24,329,999 km (0.046 R)
• M67: 24,654,477 km (0.109 R)
• M68: 25,261,096 km (0.069 R)
• M69: 26,870,620 km (0.084 R)
• M70: 27,350,380 km (0.078 R)
• M71: 28,026,712 km (0.076 R)
• M72: 28,610,892 km (0.073 R)
• M73: 30,637,046 km (0.088 R)
• M74: 30,736,977 km (0.099 R)
• M75: 31,188,463 km (0.108 R)
• M76: 31,440,236 km (0.046 R)
• M77: 32,913,626 km (0.102 R)
• M78: 33,272,661 km (0.091 R)
• M79: 34,513,575 km (0.039 R)
• M80: 35,035,073 km (0.11 R)

Planet 6 - Gas Giant

Semi-Major Axis: 7.17 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 745

Radius: 11.9

Gravity: 5.26 G

Time & Orbit

Eccentricity (e): 0.187

Orbit Range: 5.83 AU - 8.51 AU

Year: 7272 Days

Day: 5.7 Hours

Environment

Temp: -164 °C

Axial Tilt: 54.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 68,170,185 km

• M1: 344,075 km (0.117 R)
• M2: 477,666 km (0.084 R)
• M3: 761,004 km (0.085 R)
• M4: 931,247 km (0.065 R)
• M5: 1,029,832 km (0.078 R)
• M6: 1,441,675 km (0.07 R)
• M7: 2,272,990 km (0.117 R)
• M8: 2,478,238 km (0.072 R)
• M9: 2,571,438 km (0.097 R)
• M10: 2,713,406 km (0.084 R)
• M11: 2,809,598 km (0.113 R)
• M12: 3,515,101 km (0.059 R)
• M13: 3,620,418 km (0.077 R)
• M14: 3,888,049 km (0.09 R)
• M15: 4,245,887 km (0.045 R)
• M16: 4,817,201 km (0.101 R)
• M17: 5,261,656 km (0.071 R)
• M18: 5,473,636 km (0.067 R)
• M19: 5,565,490 km (0.116 R)
• M20: 5,781,509 km (0.105 R)
• M21: 5,937,539 km (0.102 R)
• M22: 6,349,831 km (0.106 R)
• M23: 7,068,799 km (0.107 R)
• M24: 7,235,899 km (0.066 R)
• M25: 7,505,774 km (0.081 R)
• M26: 7,642,058 km (0.104 R)
• M27: 7,744,831 km (0.119 R)
• M28: 8,797,402 km (0.073 R)
• M29: 9,194,584 km (0.11 R)
• M30: 9,708,752 km (0.105 R)
• M31: 10,006,751 km (0.111 R)
• M32: 10,232,195 km (0.06 R)
• M33: 11,267,562 km (0.098 R)
• M34: 11,423,892 km (0.072 R)
• M35: 11,541,476 km (0.051 R)
• M36: 12,578,189 km (0.104 R)
• M37: 12,740,203 km (0.094 R)
• M38: 12,862,275 km (0.038 R)
• M39: 13,025,636 km (0.091 R)
• M40: 13,148,606 km (0.057 R)
• M41: 13,519,908 km (0.079 R)
• M42: 13,811,025 km (0.116 R)
• M43: 14,020,312 km (0.073 R)
• M44: 14,782,214 km (0.104 R)
• M45: 15,470,813 km (0.077 R)
• M46: 16,346,260 km (0.083 R)
• M47: 17,598,843 km (0.089 R)
• M48: 18,007,993 km (0.099 R)
• M49: 18,328,432 km (0.055 R)
• M50: 19,021,369 km (0.098 R)
• M51: 19,582,062 km (0.075 R)
• M52: 19,817,230 km (0.066 R)
• M53: 20,053,295 km (0.094 R)
• M54: 20,767,326 km (0.075 R)
• M55: 21,151,493 km (0.079 R)
• M56: 21,634,994 km (0.082 R)
• M57: 21,780,852 km (0.099 R)
• M58: 22,958,935 km (0.1 R)
• M59: 24,107,248 km (0.078 R)
• M60: 24,258,342 km (0.06 R)
• M61: 24,359,320 km (0.111 R)
• M62: 24,917,021 km (0.081 R)
• M63: 25,684,309 km (0.097 R)
• M64: 26,771,736 km (0.114 R)
• M65: 27,768,357 km (0.099 R)
• M66: 28,297,784 km (0.047 R)
• M67: 29,906,110 km (0.054 R)
• M68: 30,394,398 km (0.107 R)
• M69: 30,939,981 km (0.106 R)
• M70: 31,159,142 km (0.069 R)
• M71: 31,985,670 km (0.115 R)
• M72: 32,262,726 km (0.052 R)
• M73: 33,716,368 km (0.096 R)
• M74: 33,829,165 km (0.103 R)
• M75: 34,621,585 km (0.057 R)
• M76: 34,849,123 km (0.082 R)
• M77: 35,020,114 km (0.116 R)
• M78: 35,305,696 km (0.105 R)
• M79: 36,340,315 km (0.117 R)
• M80: 36,745,426 km (0.038 R)
• M81: 36,919,408 km (0.064 R)
• M82: 37,618,329 km (0.119 R)
• M83: 38,911,005 km (0.114 R)
• M84: 39,741,273 km (0.096 R)

Planet 7 - Ice Giant

Semi-Major Axis: 16.98 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 769.7

Radius: 7.4

Gravity: 14.06 G

Time & Orbit

Eccentricity (e): 0.163

Orbit Range: 14.21 AU - 19.75 AU

Year: 26501 Days

Day: 24.8 Hours

Environment

Temp: -210 °C

Axial Tilt: 167.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 68,170,185 km

• M1: 94,995 km (0.09 R)
• M2: 187,297 km (0.113 R)
• M3: 515,065 km (0.115 R)
• M4: 562,787 km (0.103 R)
• M5: 637,736 km (0.108 R)
• M6: 971,937 km (0.073 R)
• M7: 1,458,280 km (0.117 R)
• M8: 1,599,650 km (0.119 R)
• M9: 1,857,706 km (0.071 R)
• M10: 1,933,852 km (0.103 R)
• M11: 2,050,239 km (0.093 R)
• M12: 2,927,780 km (0.037 R)
• M13: 3,475,757 km (0.042 R)
• M14: 4,305,427 km (0.045 R)
• M15: 4,355,991 km (0.108 R)
• M16: 5,909,864 km (0.072 R)
• M17: 6,715,598 km (0.076 R)
• M18: 7,987,778 km (0.113 R)
• M19: 8,301,485 km (0.119 R)
• M20: 8,491,624 km (0.078 R)
• M21: 8,555,353 km (0.115 R)
• M22: 8,683,259 km (0.099 R)
• M23: 9,005,792 km (0.116 R)
• M24: 9,929,708 km (0.114 R)
• M25: 10,267,051 km (0.058 R)
• M26: 10,403,036 km (0.114 R)
• M27: 11,022,222 km (0.06 R)
• M28: 11,301,371 km (0.07 R)
• M29: 11,795,343 km (0.098 R)
• M30: 14,369,025 km (0.079 R)
• M31: 15,057,923 km (0.107 R)
• M32: 15,289,950 km (0.108 R)
• M33: 19,917,461 km (0.11 R)
• M34: 20,087,104 km (0.047 R)
• M35: 20,342,618 km (0.114 R)
• M36: 20,513,458 km (0.108 R)
• M37: 21,115,291 km (0.079 R)
• M38: 21,288,375 km (0.075 R)
• M39: 22,424,571 km (0.098 R)
• M40: 23,580,215 km (0.07 R)
• M41: 25,029,220 km (0.083 R)
• M42: 26,974,142 km (0.093 R)
• M43: 28,297,634 km (0.114 R)
• M44: 32,193,911 km (0.033 R)
• M45: 32,993,062 km (0.094 R)
• M46: 33,899,925 km (0.084 R)
• M47: 36,358,117 km (0.101 R)
• M48: 38,028,527 km (0.088 R)
• M49: 38,555,710 km (0.074 R)
• M50: 39,617,256 km (0.059 R)
• M51: 40,151,620 km (0.081 R)
• M52: 42,421,767 km (0.082 R)
• M53: 46,072,554 km (0.103 R)
• M54: 47,651,559 km (0.049 R)
• M55: 48,561,713 km (0.115 R)
• M56: 49,133,625 km (0.115 R)
• M57: 53,433,667 km (0.049 R)
• M58: 53,551,550 km (0.044 R)
• M59: 53,787,615 km (0.099 R)
• M60: 54,379,125 km (0.055 R)
• M61: 54,853,949 km (0.072 R)
• M62: 55,807,635 km (0.091 R)
• M63: 57,007,560 km (0.097 R)
• M64: 58,094,688 km (0.112 R)
• M65: 61,027,105 km (0.099 R)
• M66: 61,397,061 km (0.094 R)
• M67: 67,416,280 km (0.066 R)
• M68: 68,309,679 km (0.073 R)
• M69: 68,565,641 km (0.104 R)
• M70: 69,979,191 km (0.072 R)
• M71: 71,402,316 km (0.066 R)
• M72: 71,922,168 km (0.097 R)
• M73: 72,704,416 km (0.066 R)
• M74: 73,620,553 km (0.089 R)
• M75: 73,882,948 km (0.07 R)
• M76: 77,056,517 km (0.06 R)
• M77: 77,456,242 km (0.117 R)
• M78: 77,723,275 km (0.112 R)
• M79: 79,331,152 km (0.078 R)
• M80: 80,004,492 km (0.085 R)
• M81: 80,139,280 km (0.108 R)
• M82: 81,221,022 km (0.112 R)
• M83: 85,320,303 km (0.117 R)
• M84: 86,701,540 km (0.1 R)
• M85: 87,951,131 km (0.107 R)
• M86: 88,229,533 km (0.077 R)
• M87: 88,647,809 km (0.111 R)
• M88: 89,206,557 km (0.084 R)
• M89: 89,486,305 km (0.104 R)
• M90: 91,735,209 km (0.058 R)
• M91: 92,017,650 km (0.09 R)
• M92: 92,158,871 km (0.099 R)
• M93: 93,576,011 km (0.101 R)
• M94: 93,718,129 km (0.112 R)
• M95: 94,857,616 km (0.092 R)
• M96: 95,000,333 km (0.06 R)

Planet 8 - Ice Giant

Semi-Major Axis: 18.81 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 206.4

Radius: 4.1

Gravity: 12.28 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 17.57 AU - 20.05 AU

Year: 30898 Days

Day: 15 Hours

Environment

Temp: -193 °C

Axial Tilt: 6.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 68,170,185 km

• M1: 140,472 km (0.099 R)
• M2: 701,315 km (0.099 R)
• M3: 2,077,166 km (0.107 R)
• M4: 2,269,998 km (0.083 R)
• M5: 2,707,572 km (0.091 R)
• M6: 3,657,518 km (0.049 R)
• M7: 4,008,325 km (0.101 R)
• M8: 4,047,969 km (0.117 R)
• M9: 4,369,754 km (0.108 R)
• M10: 6,794,586 km (0.1 R)
• M11: 7,128,189 km (0.071 R)
• M12: 7,467,028 km (0.108 R)
• M13: 7,515,797 km (0.119 R)
• M14: 8,463,948 km (0.113 R)
• M15: 8,977,817 km (0.089 R)
• M16: 9,501,858 km (0.084 R)
• M17: 10,251,942 km (0.096 R)
• M18: 10,689,217 km (0.094 R)
• M19: 12,671,987 km (0.067 R)
• M20: 13,023,093 km (0.073 R)
• M21: 13,318,100 km (0.085 R)
• M22: 13,854,708 km (0.11 R)
• M23: 13,914,846 km (0.032 R)
• M24: 15,568,950 km (0.088 R)
• M25: 15,756,545 km (0.068 R)
• M26: 16,133,831 km (0.116 R)
• M27: 16,514,259 km (0.115 R)
• M28: 16,897,678 km (0.092 R)
• M29: 17,868,867 km (0.109 R)
• M30: 19,325,651 km (0.099 R)
• M31: 19,729,416 km (0.114 R)
• M32: 21,790,276 km (0.114 R)
• M33: 22,704,319 km (0.093 R)
• M34: 23,130,374 km (0.089 R)
• M35: 25,594,101 km (0.034 R)
• M36: 26,931,805 km (0.059 R)
• M37: 28,368,244 km (0.12 R)
• M38: 28,597,428 km (0.067 R)
• M39: 28,827,061 km (0.092 R)
• M40: 28,903,805 km (0.053 R)
• M41: 31,000,269 km (0.048 R)
• M42: 32,744,431 km (0.118 R)
• M43: 35,419,689 km (0.113 R)
• M44: 35,666,227 km (0.073 R)
• M45: 35,748,655 km (0.109 R)
• M46: 36,161,246 km (0.091 R)
• M47: 40,803,717 km (0.059 R)
• M48: 42,102,077 km (0.102 R)
• M49: 42,537,706 km (0.054 R)
• M50: 43,062,645 km (0.063 R)
• M51: 44,827,750 km (0.104 R)
• M52: 45,183,494 km (0.059 R)
• M53: 45,808,514 km (0.11 R)
• M54: 46,346,468 km (0.12 R)
• M55: 46,976,723 km (0.11 R)
• M56: 48,701,736 km (0.056 R)
• M57: 49,801,879 km (0.073 R)
• M58: 50,817,499 km (0.079 R)
• M59: 52,400,544 km (0.073 R)
• M60: 53,151,076 km (0.104 R)
• M61: 53,527,614 km (0.094 R)
• M62: 55,997,026 km (0.101 R)
• M63: 56,764,164 km (0.098 R)
• M64: 56,956,547 km (0.113 R)
• M65: 57,245,570 km (0.049 R)
• M66: 57,728,173 km (0.107 R)
• M67: 58,115,332 km (0.11 R)
• M68: 59,086,821 km (0.116 R)
• M69: 59,281,747 km (0.069 R)
• M70: 59,476,822 km (0.104 R)
• M71: 60,455,940 km (0.115 R)
• M72: 64,124,230 km (0.099 R)
• M73: 65,127,882 km (0.111 R)
• M74: 65,228,561 km (0.087 R)
• M75: 65,833,685 km (0.042 R)
• M76: 67,354,347 km (0.116 R)

Kuiper Belt

Range: 30 - 59 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 472 - 11,263 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit