🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.14 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.62

Radius: 1.84

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.184

Orbit Range: 0.93 AU - 1.35 AU

Year: 464 Days

Day: 25.9 Hours

Environment

Temp: -11 °C

Axial Tilt: 1.3 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (2)

Outer Limit: 104,894,924 km

• M1: 155,133 km (0.087 R)
• M2: 596,447 km (0.078 R)

Planet 2 - Gas Giant

Semi-Major Axis: 7.46 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 528.9

Radius: 8.9

Gravity: 6.68 G

Time & Orbit

Eccentricity (e): 0.136

Orbit Range: 6.45 AU - 8.47 AU

Year: 7759 Days

Day: 13.3 Hours

Environment

Temp: -178 °C

Axial Tilt: 2.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 104,894,924 km

• M1: 127,906 km (0.088 R)
• M2: 231,428 km (0.101 R)
• M3: 303,085 km (0.113 R)
• M4: 724,203 km (0.075 R)
• M5: 810,970 km (0.093 R)
• M6: 980,016 km (0.096 R)
• M7: 1,077,105 km (0.097 R)
• M8: 1,194,689 km (0.11 R)
• M9: 1,263,803 km (0.103 R)
• M10: 1,479,673 km (0.087 R)
• M11: 1,554,322 km (0.061 R)
• M12: 2,029,146 km (0.086 R)
• M13: 2,413,612 km (0.075 R)
• M14: 2,591,933 km (0.054 R)
• M15: 3,176,561 km (0.082 R)
• M16: 3,597,230 km (0.095 R)
• M17: 3,852,893 km (0.112 R)
• M18: 4,141,019 km (0.049 R)
• M19: 4,682,713 km (0.043 R)
• M20: 4,821,689 km (0.073 R)
• M21: 4,990,286 km (0.095 R)
• M22: 5,218,123 km (0.037 R)
• M23: 5,362,186 km (0.102 R)
• M24: 5,832,372 km (0.063 R)
• M25: 5,921,981 km (0.115 R)
• M26: 6,193,651 km (0.051 R)
• M27: 6,906,485 km (0.086 R)
• M28: 7,256,544 km (0.068 R)
• M29: 7,320,871 km (0.091 R)
• M30: 7,710,573 km (0.117 R)
• M31: 8,073,647 km (0.058 R)
• M32: 8,207,089 km (0.037 R)
• M33: 8,714,076 km (0.109 R)
• M34: 8,782,442 km (0.116 R)
• M35: 9,127,116 km (0.113 R)
• M36: 9,900,686 km (0.114 R)
• M37: 10,151,113 km (0.048 R)
• M38: 10,331,379 km (0.09 R)
• M39: 11,397,712 km (0.094 R)
• M40: 11,585,158 km (0.113 R)
• M41: 12,229,925 km (0.091 R)
• M42: 12,692,033 km (0.116 R)
• M43: 13,120,780 km (0.11 R)
• M44: 13,238,514 km (0.116 R)
• M45: 13,317,202 km (0.053 R)
• M46: 13,712,889 km (0.108 R)
• M47: 14,032,280 km (0.048 R)
• M48: 14,719,234 km (0.099 R)
• M49: 14,882,445 km (0.11 R)
• M50: 15,375,819 km (0.052 R)
• M51: 16,209,827 km (0.115 R)
• M52: 16,674,777 km (0.05 R)
• M53: 17,273,019 km (0.075 R)
• M54: 17,747,843 km (0.064 R)
• M55: 18,270,837 km (0.091 R)
• M56: 18,578,260 km (0.112 R)
• M57: 18,754,786 km (0.044 R)
• M58: 19,242,774 km (0.093 R)
• M59: 19,376,664 km (0.088 R)
• M60: 19,960,245 km (0.101 R)
• M61: 20,186,138 km (0.082 R)
• M62: 20,823,425 km (0.091 R)
• M63: 20,960,906 km (0.101 R)
• M64: 21,282,691 km (0.106 R)
• M65: 22,445,515 km (0.094 R)
• M66: 23,915,763 km (0.086 R)
• M67: 25,270,222 km (0.113 R)
• M68: 25,367,909 km (0.067 R)
• M69: 25,563,733 km (0.066 R)
• M70: 25,809,223 km (0.076 R)
• M71: 27,248,205 km (0.083 R)
• M72: 27,549,196 km (0.081 R)
• M73: 29,070,457 km (0.113 R)
• M74: 30,151,600 km (0.082 R)
• M75: 32,035,337 km (0.04 R)
• M76: 32,194,060 km (0.119 R)
• M77: 32,406,040 km (0.108 R)
• M78: 32,565,362 km (0.087 R)
• M79: 33,258,748 km (0.069 R)
• M80: 33,795,356 km (0.068 R)
• M81: 34,226,796 km (0.084 R)
• M82: 35,805,802 km (0.089 R)
• M83: 36,135,515 km (0.071 R)
• M84: 36,466,127 km (0.103 R)
• M85: 37,074,990 km (0.096 R)

Planet 3 - Gas Giant

Semi-Major Axis: 9.19 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 663.7

Radius: 12.3

Gravity: 4.39 G

Time & Orbit

Eccentricity (e): 0.133

Orbit Range: 7.97 AU - 10.41 AU

Year: 10609 Days

Day: 13.4 Hours

Environment

Temp: -178 °C

Axial Tilt: 46.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 104,894,924 km

• M1: 181,761 km (0.112 R)
• M2: 302,636 km (0.078 R)
• M3: 408,552 km (0.086 R)
• M4: 606,919 km (0.095 R)
• M5: 875,896 km (0.09 R)
• M6: 1,005,896 km (0.057 R)
• M7: 1,083,388 km (0.087 R)
• M8: 1,371,812 km (0.103 R)
• M9: 1,593,068 km (0.036 R)
• M10: 1,731,745 km (0.114 R)
• M11: 2,046,050 km (0.102 R)
• M12: 2,172,011 km (0.101 R)
• M13: 2,646,985 km (0.099 R)
• M14: 2,729,413 km (0.044 R)
• M15: 2,953,361 km (0.081 R)
• M16: 3,125,399 km (0.091 R)
• M17: 3,300,727 km (0.092 R)
• M18: 3,419,508 km (0.11 R)
• M19: 4,751,528 km (0.036 R)
• M20: 4,953,933 km (0.119 R)
• M21: 5,720,323 km (0.099 R)
• M22: 6,008,299 km (0.1 R)
• M23: 6,673,561 km (0.115 R)
• M24: 7,053,240 km (0.111 R)
• M25: 7,518,340 km (0.118 R)
• M26: 7,913,578 km (0.12 R)
• M27: 8,848,415 km (0.03 R)
• M28: 9,223,756 km (0.11 R)
• M29: 9,350,017 km (0.054 R)
• M30: 9,519,212 km (0.074 R)
• M31: 9,775,024 km (0.04 R)
• M32: 9,946,912 km (0.06 R)
• M33: 10,512,242 km (0.094 R)
• M34: 11,267,412 km (0.113 R)
• M35: 11,948,232 km (0.078 R)
• M36: 12,363,067 km (0.041 R)
• M37: 13,065,130 km (0.044 R)
• M38: 14,605,988 km (0.12 R)
• M39: 16,714,271 km (0.082 R)
• M40: 17,178,323 km (0.115 R)
• M41: 17,803,643 km (0.085 R)
• M42: 18,542,656 km (0.066 R)
• M43: 18,862,496 km (0.029 R)
• M44: 19,561,717 km (0.119 R)
• M45: 20,764,334 km (0.112 R)
• M46: 20,874,887 km (0.078 R)
• M47: 20,985,589 km (0.116 R)
• M48: 21,430,344 km (0.04 R)
• M49: 21,822,141 km (0.087 R)
• M50: 22,442,673 km (0.098 R)
• M51: 22,669,613 km (0.092 R)
• M52: 23,643,195 km (0.046 R)
• M53: 23,874,175 km (0.07 R)
• M54: 24,280,333 km (0.107 R)
• M55: 24,396,870 km (0.078 R)
• M56: 25,040,739 km (0.106 R)
• M57: 25,630,902 km (0.096 R)
• M58: 25,927,705 km (0.092 R)
• M59: 27,368,332 km (0.071 R)
• M60: 27,671,717 km (0.114 R)
• M61: 28,159,555 km (0.075 R)
• M62: 28,958,258 km (0.103 R)
• M63: 29,453,427 km (0.029 R)
• M64: 29,951,438 km (0.095 R)
• M65: 30,389,461 km (0.095 R)
• M66: 30,515,123 km (0.082 R)
• M67: 30,829,728 km (0.098 R)
• M68: 31,589,236 km (0.078 R)
• M69: 31,780,123 km (0.072 R)
• M70: 32,354,878 km (0.112 R)
• M71: 33,774,562 km (0.055 R)
• M72: 36,207,621 km (0.114 R)
• M73: 36,340,764 km (0.059 R)
• M74: 37,209,927 km (0.093 R)
• M75: 38,492,729 km (0.098 R)
• M76: 40,065,003 km (0.068 R)
• M77: 43,342,542 km (0.108 R)
• M78: 43,483,912 km (0.089 R)
• M79: 43,767,101 km (0.083 R)
• M80: 46,415,731 km (0.12 R)
• M81: 47,795,921 km (0.073 R)
• M82: 47,942,078 km (0.074 R)
• M83: 48,161,389 km (0.097 R)
• M84: 48,601,207 km (0.054 R)
• M85: 49,042,221 km (0.09 R)
• M86: 49,337,079 km (0.106 R)

Planet 4 - Gas Giant

Semi-Major Axis: 9.74 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 611.2

Radius: 11

Gravity: 5.05 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 8.26 AU - 11.22 AU

Year: 11575 Days

Day: 10.8 Hours

Environment

Temp: -188 °C

Axial Tilt: 164.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 104,894,924 km

• M1: 173,085 km (0.059 R)
• M2: 249,230 km (0.059 R)
• M3: 512,672 km (0.119 R)
• M4: 901,178 km (0.109 R)
• M5: 1,158,187 km (0.096 R)
• M6: 1,438,683 km (0.069 R)
• M7: 1,717,234 km (0.025 R)
• M8: 1,912,609 km (0.05 R)
• M9: 2,298,870 km (0.109 R)
• M10: 2,379,055 km (0.078 R)
• M11: 2,880,357 km (0.092 R)
• M12: 3,506,424 km (0.108 R)
• M13: 4,206,692 km (0.117 R)
• M14: 4,640,825 km (0.085 R)
• M15: 4,915,038 km (0.06 R)
• M16: 5,733,189 km (0.101 R)
• M17: 5,990,647 km (0.041 R)
• M18: 6,064,847 km (0.071 R)
• M19: 6,364,941 km (0.085 R)
• M20: 6,440,787 km (0.041 R)
• M21: 6,669,971 km (0.091 R)
• M22: 6,824,356 km (0.068 R)
• M23: 8,599,035 km (0.099 R)
• M24: 8,724,997 km (0.091 R)
• M25: 9,278,060 km (0.067 R)
• M26: 11,555,538 km (0.091 R)
• M27: 11,694,814 km (0.101 R)
• M28: 11,834,538 km (0.045 R)
• M29: 12,351,548 km (0.083 R)
• M30: 12,588,960 km (0.039 R)
• M31: 12,924,059 km (0.118 R)
• M32: 14,144,479 km (0.106 R)
• M33: 14,293,478 km (0.087 R)
• M34: 14,392,961 km (0.113 R)
• M35: 14,542,858 km (0.11 R)
• M36: 14,843,998 km (0.077 R)
• M37: 15,503,575 km (0.118 R)
• M38: 15,914,221 km (0.118 R)
• M39: 17,009,278 km (0.111 R)
• M40: 18,724,417 km (0.109 R)
• M41: 18,942,681 km (0.066 R)
• M42: 19,106,939 km (0.119 R)
• M43: 19,326,549 km (0.089 R)
• M44: 19,436,803 km (0.06 R)
• M45: 19,824,111 km (0.058 R)
• M46: 21,057,845 km (0.065 R)
• M47: 21,855,800 km (0.104 R)
• M48: 22,085,732 km (0.06 R)
• M49: 22,605,734 km (0.11 R)
• M50: 23,599,064 km (0.092 R)
• M51: 23,953,013 km (0.102 R)
• M52: 24,130,735 km (0.088 R)
• M53: 24,606,606 km (0.12 R)
• M54: 24,726,134 km (0.108 R)
• M55: 25,085,618 km (0.097 R)
• M56: 26,296,613 km (0.09 R)
• M57: 26,418,685 km (0.081 R)
• M58: 26,602,391 km (0.108 R)
• M59: 27,712,706 km (0.045 R)
• M60: 28,273,549 km (0.051 R)
• M61: 28,586,807 km (0.068 R)
• M62: 28,838,131 km (0.112 R)
• M63: 29,027,223 km (0.092 R)
• M64: 30,106,123 km (0.085 R)
• M65: 30,747,000 km (0.076 R)
• M66: 31,069,084 km (0.103 R)
• M67: 32,368,641 km (0.094 R)
• M68: 32,630,736 km (0.082 R)
• M69: 33,487,184 km (0.034 R)
• M70: 34,819,353 km (0.07 R)
• M71: 35,829,737 km (0.077 R)
• M72: 37,191,975 km (0.111 R)
• M73: 38,709,945 km (0.098 R)
• M74: 40,529,953 km (0.102 R)
• M75: 40,671,173 km (0.093 R)
• M76: 40,812,393 km (0.087 R)
• M77: 40,883,153 km (0.099 R)
• M78: 41,308,310 km (0.088 R)
• M79: 41,592,546 km (0.113 R)
• M80: 41,734,964 km (0.1 R)
• M81: 42,449,293 km (0.04 R)
• M82: 42,879,836 km (0.074 R)
• M83: 43,095,706 km (0.075 R)
• M84: 44,616,518 km (0.084 R)
• M85: 46,154,833 km (0.081 R)
• M86: 46,449,690 km (0.11 R)
• M87: 48,307,546 km (0.081 R)
• M88: 48,907,284 km (0.067 R)
• M89: 49,735,757 km (0.114 R)

Planet 5 - Ice Giant

Semi-Major Axis: 17.4 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 190.3

Radius: 4.9

Gravity: 7.93 G

Time & Orbit

Eccentricity (e): 0.056

Orbit Range: 16.43 AU - 18.37 AU

Year: 27639 Days

Day: 24 Hours

Environment

Temp: -211 °C

Axial Tilt: 150.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 104,894,924 km

• M1: 349,311 km (0.055 R)
• M2: 688,001 km (0.08 R)
• M3: 942,766 km (0.116 R)
• M4: 1,505,852 km (0.119 R)
• M5: 1,585,887 km (0.107 R)
• M6: 2,523,566 km (0.091 R)
• M7: 2,619,010 km (0.031 R)
• M8: 2,945,283 km (0.119 R)
• M9: 3,147,240 km (0.117 R)
• M10: 3,493,858 km (0.114 R)
• M11: 4,799,548 km (0.099 R)
• M12: 5,037,110 km (0.073 R)
• M13: 5,523,752 km (0.09 R)
• M14: 6,367,633 km (0.059 R)
• M15: 6,410,867 km (0.095 R)
• M16: 8,031,610 km (0.082 R)
• M17: 8,078,285 km (0.098 R)
• M18: 8,313,453 km (0.114 R)
• M19: 8,694,329 km (0.109 R)
• M20: 9,374,401 km (0.05 R)
• M21: 10,682,186 km (0.075 R)
• M22: 10,888,481 km (0.11 R)
• M23: 10,940,242 km (0.109 R)
• M24: 12,585,070 km (0.107 R)
• M25: 12,857,488 km (0.066 R)
• M26: 13,630,760 km (0.112 R)
• M27: 13,966,607 km (0.111 R)
• M28: 15,980,194 km (0.054 R)
• M29: 16,156,869 km (0.118 R)
• M30: 16,631,543 km (0.091 R)
• M31: 18,082,493 km (0.114 R)
• M32: 18,451,401 km (0.09 R)
• M33: 18,574,969 km (0.102 R)
• M34: 19,447,723 km (0.064 R)
• M35: 19,636,366 km (0.111 R)
• M36: 20,015,746 km (0.119 R)
• M37: 21,556,904 km (0.074 R)
• M38: 21,621,829 km (0.043 R)
• M39: 21,882,728 km (0.08 R)
• M40: 22,210,197 km (0.051 R)
• M41: 22,671,408 km (0.11 R)
• M42: 22,737,530 km (0.086 R)
• M43: 23,135,759 km (0.045 R)
• M44: 23,202,331 km (0.079 R)
• M45: 23,402,493 km (0.103 R)
• M46: 24,006,419 km (0.057 R)
• M47: 25,641,823 km (0.055 R)
• M48: 26,403,426 km (0.09 R)
• M49: 26,891,863 km (0.109 R)
• M50: 27,102,048 km (0.084 R)
• M51: 27,383,292 km (0.117 R)
• M52: 29,667,352 km (0.119 R)
• M53: 30,102,383 km (0.109 R)
• M54: 30,685,665 km (0.067 R)
• M55: 30,978,727 km (0.11 R)
• M56: 32,085,901 km (0.097 R)
• M57: 33,657,726 km (0.089 R)
• M58: 35,484,465 km (0.092 R)
• M59: 35,638,252 km (0.11 R)
• M60: 35,946,274 km (0.117 R)
• M61: 36,720,144 km (0.116 R)
• M62: 37,031,307 km (0.091 R)
• M63: 38,521,003 km (0.113 R)
• M64: 39,233,388 km (0.083 R)
• M65: 39,551,433 km (0.066 R)
• M66: 40,912,624 km (0.118 R)
• M67: 41,963,848 km (0.072 R)
• M68: 46,340,783 km (0.081 R)
• M69: 46,845,227 km (0.073 R)
• M70: 46,929,600 km (0.054 R)
• M71: 49,996,805 km (0.047 R)
• M72: 50,427,797 km (0.06 R)
• M73: 52,251,843 km (0.113 R)
• M74: 52,426,723 km (0.065 R)
• M75: 52,689,417 km (0.042 R)
• M76: 53,568,006 km (0.116 R)
• M77: 54,539,943 km (0.036 R)
• M78: 56,322,252 km (0.067 R)
• M79: 56,411,861 km (0.046 R)
• M80: 57,130,380 km (0.083 R)
• M81: 57,220,438 km (0.089 R)
• M82: 60,218,080 km (0.098 R)
• M83: 61,412,918 km (0.049 R)

Planet 6 - Ice Giant

Semi-Major Axis: 18.11 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 833.5

Radius: 3.8

Gravity: 57.72 G

Time & Orbit

Eccentricity (e): 0.197

Orbit Range: 14.54 AU - 21.68 AU

Year: 29348 Days

Day: 19 Hours

Environment

Temp: -197 °C

Axial Tilt: 40 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 104,894,924 km

• M1: 152,141 km (0.082 R)
• M2: 461,659 km (0.061 R)
• M3: 592,108 km (0.068 R)
• M4: 647,460 km (0.037 R)
• M5: 1,081,742 km (0.079 R)
• M6: 1,744,760 km (0.07 R)
• M7: 1,906,475 km (0.11 R)
• M8: 2,419,746 km (0.118 R)
• M9: 2,509,205 km (0.067 R)
• M10: 2,645,489 km (0.116 R)
• M11: 2,925,386 km (0.038 R)
• M12: 3,020,830 km (0.096 R)
• M13: 3,768,520 km (0.107 R)
• M14: 4,680,917 km (0.026 R)
• M15: 5,018,560 km (0.036 R)
• M16: 5,422,175 km (0.085 R)
• M17: 7,657,167 km (0.102 R)
• M18: 8,255,259 km (0.111 R)
• M19: 8,322,578 km (0.075 R)
• M20: 9,425,115 km (0.098 R)
• M21: 9,850,272 km (0.086 R)
• M22: 10,281,712 km (0.117 R)
• M23: 10,354,117 km (0.097 R)
• M24: 11,536,988 km (0.103 R)
• M25: 12,297,843 km (0.087 R)
• M26: 12,918,075 km (0.114 R)
• M27: 12,996,315 km (0.046 R)
• M28: 13,867,274 km (0.068 R)
• M29: 14,188,610 km (0.026 R)
• M30: 15,999,642 km (0.055 R)
• M31: 17,361,730 km (0.05 R)
• M32: 17,448,048 km (0.116 R)
• M33: 17,534,516 km (0.094 R)
• M34: 18,056,613 km (0.096 R)
• M35: 18,407,420 km (0.09 R)
• M36: 20,013,652 km (0.055 R)
• M37: 20,376,726 km (0.086 R)
• M38: 20,559,086 km (0.06 R)
• M39: 21,850,415 km (0.065 R)
• M40: 21,943,614 km (0.084 R)
• M41: 22,036,963 km (0.075 R)
• M42: 26,770,988 km (0.084 R)
• M43: 27,271,093 km (0.114 R)
• M44: 27,472,003 km (0.071 R)
• M45: 27,774,341 km (0.116 R)
• M46: 28,484,033 km (0.115 R)
• M47: 29,817,698 km (0.099 R)
• M48: 30,440,025 km (0.11 R)
• M49: 30,961,972 km (0.066 R)
• M50: 32,651,830 km (0.094 R)
• M51: 33,615,390 km (0.119 R)
• M52: 33,938,671 km (0.102 R)
• M53: 34,479,766 km (0.073 R)
• M54: 36,561,869 km (0.109 R)
• M55: 38,458,920 km (0.102 R)
• M56: 40,159,249 km (0.114 R)
• M57: 44,338,864 km (0.099 R)
• M58: 44,693,411 km (0.118 R)
• M59: 47,925,772 km (0.068 R)
• M60: 49,753,858 km (0.073 R)
• M61: 49,876,528 km (0.112 R)
• M62: 50,985,198 km (0.107 R)
• M63: 51,480,517 km (0.102 R)
• M64: 52,600,855 km (0.1 R)
• M65: 52,725,919 km (0.077 R)
• M66: 54,865,617 km (0.075 R)
• M67: 55,119,186 km (0.057 R)
• M68: 56,009,892 km (0.081 R)
• M69: 56,393,012 km (0.035 R)
• M70: 61,979,595 km (0.053 R)
• M71: 64,771,390 km (0.074 R)
• M72: 65,980,290 km (0.051 R)
• M73: 68,284,098 km (0.085 R)
• M74: 68,556,815 km (0.079 R)
• M75: 68,966,713 km (0.1 R)
• M76: 76,906,171 km (0.082 R)
• M77: 77,900,997 km (0.051 R)
• M78: 80,046,978 km (0.047 R)
• M79: 80,334,505 km (0.119 R)
• M80: 80,766,544 km (0.058 R)
• M81: 84,543,142 km (0.05 R)
• M82: 85,422,778 km (0.069 R)
• M83: 89,120,538 km (0.086 R)
• M84: 89,418,537 km (0.094 R)
• M85: 92,116,086 km (0.111 R)
• M86: 93,323,640 km (0.112 R)
• M87: 99,438,901 km (0.118 R)
• M88: 99,593,436 km (0.118 R)
• M89: 102,232,642 km (0.089 R)
• M90: 102,700,883 km (0.114 R)
• M91: 103,326,202 km (0.095 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 318 - 16,717 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit