🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.64 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.94

Radius: 1.3

Gravity: 1.15 G

Time & Orbit

Eccentricity (e): 0.128

Orbit Range: 0.56 AU - 0.72 AU

Year: 185 Days

Day: 46.2 Hours

Environment

Temp: 153 °C

Axial Tilt: 47.5 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.48 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.93

Radius: 0.97

Gravity: 0.99 G

Time & Orbit

Eccentricity (e): 0.194

Orbit Range: 1.19 AU - 1.77 AU

Year: 651 Days

Day: 45.9 Hours

Environment

Temp: -35 °C

Axial Tilt: 23.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 2.19 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.33

Radius: 1.62

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.129

Orbit Range: 1.91 AU - 2.47 AU

Year: 1172 Days

Day: 44.8 Hours

Environment

Temp: -75 °C

Axial Tilt: 8.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 86,120,450 km

• M1: 975,528 km (0.091 R)

Planet 4 - Terrestrial

Semi-Major Axis: 2.2 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.28

Radius: 1.79

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.009

Orbit Range: 2.18 AU - 2.22 AU

Year: 1180 Days

Day: 20.6 Hours

Environment

Temp: -70 °C

Axial Tilt: 22.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 5.64 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 40.5

Radius: 13.2

Gravity: 0.23 G

Time & Orbit

Eccentricity (e): 0.19

Orbit Range: 4.57 AU - 6.71 AU

Year: 4844 Days

Day: 7.6 Hours

Environment

Temp: -152 °C

Axial Tilt: 34.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (38)

Outer Limit: 86,120,450 km

• M1: 287,378 km (0.106 R)
• M2: 388,057 km (0.06 R)
• M3: 496,665 km (0.113 R)
• M4: 1,060,200 km (0.112 R)
• M5: 1,256,772 km (0.051 R)
• M6: 1,375,852 km (0.065 R)
• M7: 1,557,912 km (0.119 R)
• M8: 2,229,008 km (0.092 R)
• M9: 2,375,465 km (0.118 R)
• M10: 2,792,244 km (0.106 R)
• M11: 3,155,617 km (0.119 R)
• M12: 3,365,503 km (0.043 R)
• M13: 3,963,446 km (0.105 R)
• M14: 4,372,447 km (0.089 R)
• M15: 4,582,033 km (0.113 R)
• M16: 4,795,061 km (0.088 R)
• M17: 4,998,663 km (0.117 R)
• M18: 5,388,067 km (0.04 R)
• M19: 5,480,368 km (0.081 R)
• M20: 5,653,154 km (0.085 R)
• M21: 5,787,343 km (0.103 R)
• M22: 6,045,400 km (0.072 R)
• M23: 6,168,818 km (0.07 R)
• M24: 6,432,409 km (0.088 R)
• M25: 6,999,535 km (0.103 R)
• M26: 7,450,124 km (0.114 R)
• M27: 8,594,547 km (0.075 R)
• M28: 9,108,566 km (0.077 R)
• M29: 9,793,275 km (0.105 R)
• M30: 9,922,528 km (0.108 R)
• M31: 10,084,991 km (0.114 R)
• M32: 10,362,944 km (0.048 R)
• M33: 10,445,223 km (0.115 R)
• M34: 10,577,317 km (0.102 R)
• M35: 10,676,800 km (0.1 R)
• M36: 10,926,778 km (0.053 R)
• M37: 11,111,382 km (0.107 R)
• M38: 11,364,651 km (0.114 R)

Planet 6 - Gas Giant

Semi-Major Axis: 9.82 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 631.3

Radius: 10.6

Gravity: 5.62 G

Time & Orbit

Eccentricity (e): 0.083

Orbit Range: 9 AU - 10.64 AU

Year: 11129 Days

Day: 11.6 Hours

Environment

Temp: -182 °C

Axial Tilt: 45.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 86,120,450 km

• M1: 232,924 km (0.066 R)
• M2: 431,291 km (0.072 R)
• M3: 516,561 km (0.071 R)
• M4: 776,263 km (0.082 R)
• M5: 921,822 km (0.095 R)
• M6: 1,077,105 km (0.053 R)
• M7: 1,688,062 km (0.055 R)
• M8: 2,029,594 km (0.026 R)
• M9: 2,182,783 km (0.072 R)
• M10: 2,555,132 km (0.075 R)
• M11: 2,721,036 km (0.089 R)
• M12: 2,976,549 km (0.029 R)
• M13: 3,602,915 km (0.089 R)
• M14: 3,979,154 km (0.117 R)
• M15: 4,735,371 km (0.09 R)
• M16: 4,871,355 km (0.117 R)
• M17: 5,008,686 km (0.076 R)
• M18: 5,112,657 km (0.078 R)
• M19: 5,322,543 km (0.104 R)
• M20: 5,464,212 km (0.119 R)
• M21: 5,714,938 km (0.06 R)
• M22: 5,932,902 km (0.095 R)
• M23: 6,452,156 km (0.116 R)
• M24: 6,909,028 km (0.091 R)
• M25: 7,024,817 km (0.109 R)
• M26: 7,258,489 km (0.06 R)
• M27: 7,415,716 km (0.099 R)
• M28: 8,015,304 km (0.109 R)
• M29: 8,218,608 km (0.109 R)
• M30: 9,091,362 km (0.091 R)
• M31: 9,474,332 km (0.11 R)
• M32: 10,124,485 km (0.118 R)
• M33: 10,788,998 km (0.109 R)
• M34: 11,240,036 km (0.087 R)
• M35: 12,300,386 km (0.104 R)
• M36: 12,866,314 km (0.055 R)
• M37: 13,682,520 km (0.096 R)
• M38: 14,219,726 km (0.093 R)
• M39: 14,367,380 km (0.028 R)
• M40: 14,863,296 km (0.051 R)
• M41: 15,063,309 km (0.068 R)
• M42: 15,163,689 km (0.042 R)
• M43: 15,668,582 km (0.089 R)
• M44: 16,643,212 km (0.042 R)
• M45: 17,796,163 km (0.056 R)
• M46: 18,650,815 km (0.085 R)
• M47: 19,083,153 km (0.081 R)
• M48: 21,916,088 km (0.04 R)
• M49: 22,429,658 km (0.054 R)
• M50: 23,993,703 km (0.1 R)
• M51: 24,522,831 km (0.101 R)
• M52: 25,115,388 km (0.1 R)
• M53: 25,473,077 km (0.117 R)
• M54: 26,314,415 km (0.119 R)
• M55: 27,716,297 km (0.117 R)
• M56: 27,839,416 km (0.099 R)
• M57: 30,211,739 km (0.066 R)
• M58: 30,401,728 km (0.098 R)
• M59: 30,846,782 km (0.109 R)
• M60: 33,169,139 km (0.089 R)
• M61: 33,496,160 km (0.116 R)
• M62: 34,483,506 km (0.118 R)
• M63: 35,213,693 km (0.061 R)
• M64: 35,614,167 km (0.058 R)
• M65: 35,881,947 km (0.104 R)
• M66: 36,824,413 km (0.107 R)
• M67: 37,163,103 km (0.099 R)
• M68: 37,366,706 km (0.099 R)
• M69: 38,459,069 km (0.028 R)
• M70: 39,078,255 km (0.092 R)
• M71: 39,216,334 km (0.076 R)
• M72: 40,186,925 km (0.067 R)
• M73: 40,745,224 km (0.054 R)
• M74: 41,376,377 km (0.108 R)
• M75: 43,003,853 km (0.112 R)
• M76: 43,574,868 km (0.097 R)
• M77: 44,220,233 km (0.115 R)
• M78: 44,796,484 km (0.089 R)
• M79: 45,013,251 km (0.115 R)
• M80: 45,230,318 km (0.085 R)
• M81: 47,420,580 km (0.069 R)
• M82: 47,715,288 km (0.036 R)
• M83: 48,602,703 km (0.095 R)
• M84: 50,094,193 km (0.115 R)

Planet 7 - Gas Giant

Semi-Major Axis: 10.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 612.1

Radius: 10.5

Gravity: 5.55 G

Time & Orbit

Eccentricity (e): 0.068

Orbit Range: 9.42 AU - 10.8 AU

Year: 11626 Days

Day: 10.1 Hours

Environment

Temp: -167 °C

Axial Tilt: 26 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 86,120,450 km

• M1: 205,996 km (0.083 R)
• M2: 422,016 km (0.082 R)
• M3: 787,334 km (0.042 R)
• M4: 1,033,422 km (0.088 R)
• M5: 1,282,652 km (0.057 R)
• M6: 1,621,342 km (0.118 R)
• M7: 1,764,806 km (0.109 R)
• M8: 1,862,942 km (0.088 R)
• M9: 1,988,156 km (0.088 R)
• M10: 2,740,633 km (0.119 R)
• M11: 3,419,658 km (0.061 R)
• M12: 3,512,109 km (0.109 R)
• M13: 3,825,966 km (0.028 R)
• M14: 3,954,171 km (0.096 R)
• M15: 4,380,674 km (0.076 R)
• M16: 4,481,204 km (0.079 R)
• M17: 4,753,024 km (0.063 R)
• M18: 5,065,384 km (0.118 R)
• M19: 5,312,968 km (0.12 R)
• M20: 5,600,795 km (0.064 R)
• M21: 5,746,653 km (0.086 R)
• M22: 5,856,906 km (0.062 R)
• M23: 7,154,967 km (0.092 R)
• M24: 7,273,748 km (0.113 R)
• M25: 7,958,906 km (0.12 R)
• M26: 8,123,015 km (0.059 R)
• M27: 9,003,697 km (0.07 R)
• M28: 9,260,856 km (0.107 R)
• M29: 9,738,672 km (0.106 R)
• M30: 10,135,555 km (0.097 R)
• M31: 10,224,566 km (0.087 R)
• M32: 10,628,031 km (0.048 R)
• M33: 11,082,360 km (0.079 R)
• M34: 11,174,063 km (0.102 R)
• M35: 12,770,273 km (0.107 R)
• M36: 12,866,464 km (0.026 R)
• M37: 13,350,712 km (0.087 R)
• M38: 13,595,006 km (0.069 R)
• M39: 13,989,046 km (0.025 R)
• M40: 14,738,083 km (0.067 R)
• M41: 15,244,771 km (0.099 R)
• M42: 15,346,647 km (0.106 R)
• M43: 16,119,021 km (0.09 R)
• M44: 16,483,741 km (0.105 R)
• M45: 16,693,477 km (0.032 R)
• M46: 16,851,303 km (0.098 R)
• M47: 17,862,285 km (0.107 R)
• M48: 18,510,941 km (0.093 R)
• M49: 19,002,520 km (0.092 R)
• M50: 19,775,791 km (0.107 R)
• M51: 20,278,291 km (0.12 R)
• M52: 20,728,580 km (0.119 R)
• M53: 21,409,998 km (0.106 R)
• M54: 21,925,962 km (0.107 R)
• M55: 23,087,290 km (0.116 R)
• M56: 23,263,217 km (0.12 R)
• M57: 23,439,593 km (0.104 R)
• M58: 23,734,450 km (0.085 R)
• M59: 24,986,584 km (0.08 R)
• M60: 25,408,600 km (0.054 R)
• M61: 26,076,854 km (0.114 R)
• M62: 26,382,332 km (0.111 R)
• M63: 26,566,338 km (0.037 R)
• M64: 29,885,466 km (0.054 R)
• M65: 30,783,951 km (0.12 R)
• M66: 30,977,530 km (0.062 R)
• M67: 31,560,962 km (0.093 R)
• M68: 32,017,235 km (0.086 R)
• M69: 32,410,079 km (0.118 R)
• M70: 33,200,555 km (0.118 R)
• M71: 34,331,365 km (0.063 R)
• M72: 35,542,360 km (0.092 R)
• M73: 35,745,514 km (0.109 R)
• M74: 36,017,034 km (0.057 R)
• M75: 36,085,101 km (0.081 R)
• M76: 36,221,085 km (0.081 R)
• M77: 36,357,369 km (0.11 R)
• M78: 36,493,802 km (0.116 R)
• M79: 36,835,783 km (0.047 R)
• M80: 37,384,957 km (0.097 R)
• M81: 38,144,465 km (0.072 R)
• M82: 40,241,827 km (0.078 R)
• M83: 41,233,362 km (0.028 R)
• M84: 43,168,261 km (0.119 R)
• M85: 43,385,178 km (0.078 R)
• M86: 44,620,557 km (0.103 R)
• M87: 45,793,853 km (0.097 R)
• M88: 46,014,959 km (0.072 R)
• M89: 47,946,267 km (0.087 R)
• M90: 48,170,814 km (0.047 R)

Planet 8 - Ice Giant

Semi-Major Axis: 16.48 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 618

Radius: 7.8

Gravity: 10.16 G

Time & Orbit

Eccentricity (e): 0.032

Orbit Range: 15.95 AU - 17.01 AU

Year: 24195 Days

Day: 24.3 Hours

Environment

Temp: -191 °C

Axial Tilt: 7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 86,120,450 km

• M1: 281,842 km (0.076 R)
• M2: 466,895 km (0.064 R)
• M3: 690,394 km (0.059 R)
• M4: 1,291,927 km (0.056 R)
• M5: 2,933,764 km (0.056 R)
• M6: 3,056,284 km (0.115 R)
• M7: 3,138,863 km (0.104 R)
• M8: 3,476,655 km (0.117 R)
• M9: 3,562,972 km (0.046 R)
• M10: 3,870,546 km (0.113 R)
• M11: 4,371,250 km (0.082 R)
• M12: 4,796,108 km (0.092 R)
• M13: 5,184,913 km (0.052 R)
• M14: 5,383,130 km (0.066 R)
• M15: 6,464,274 km (0.05 R)
• M16: 6,731,455 km (0.095 R)
• M17: 7,111,434 km (0.092 R)
• M18: 7,498,593 km (0.074 R)
• M19: 7,554,393 km (0.082 R)
• M20: 7,722,840 km (0.04 R)
• M21: 7,949,332 km (0.118 R)
• M22: 8,936,229 km (0.112 R)
• M23: 9,293,768 km (0.104 R)
• M24: 10,084,392 km (0.083 R)
• M25: 11,150,576 km (0.086 R)
• M26: 12,120,868 km (0.118 R)
• M27: 12,983,450 km (0.065 R)
• M28: 13,117,938 km (0.116 R)
• M29: 13,797,262 km (0.102 R)
• M30: 14,279,566 km (0.048 R)
• M31: 15,048,499 km (0.101 R)
• M32: 17,807,083 km (0.101 R)
• M33: 18,938,043 km (0.11 R)
• M34: 19,550,796 km (0.095 R)
• M35: 20,014,550 km (0.104 R)
• M36: 21,586,524 km (0.1 R)
• M37: 21,905,766 km (0.101 R)
• M38: 22,548,737 km (0.072 R)
• M39: 22,629,520 km (0.065 R)
• M40: 23,361,203 km (0.087 R)
• M41: 24,764,132 km (0.105 R)
• M42: 24,931,084 km (0.116 R)
• M43: 26,109,466 km (0.113 R)
• M44: 27,910,924 km (0.074 R)
• M45: 28,520,385 km (0.028 R)
• M46: 28,870,444 km (0.115 R)
• M47: 29,663,612 km (0.071 R)
• M48: 31,632,320 km (0.108 R)
• M49: 31,904,139 km (0.078 R)
• M50: 33,550,614 km (0.038 R)
• M51: 34,291,273 km (0.08 R)
• M52: 35,506,307 km (0.12 R)
• M53: 36,166,482 km (0.068 R)
• M54: 37,690,286 km (0.113 R)
• M55: 37,786,328 km (0.113 R)
• M56: 38,363,626 km (0.113 R)
• M57: 40,309,146 km (0.048 R)
• M58: 41,690,084 km (0.111 R)
• M59: 41,888,601 km (0.107 R)
• M60: 43,790,289 km (0.118 R)
• M61: 43,891,267 km (0.107 R)
• M62: 44,093,224 km (0.112 R)
• M63: 44,802,468 km (0.082 R)
• M64: 46,129,850 km (0.062 R)
• M65: 48,405,383 km (0.118 R)
• M66: 48,509,653 km (0.104 R)
• M67: 48,614,072 km (0.104 R)
• M68: 49,661,856 km (0.059 R)
• M69: 50,929,099 km (0.083 R)
• M70: 51,993,338 km (0.074 R)
• M71: 53,064,758 km (0.092 R)
• M72: 53,927,190 km (0.065 R)
• M73: 54,360,126 km (0.071 R)
• M74: 55,665,966 km (0.088 R)
• M75: 57,202,336 km (0.081 R)
• M76: 57,533,396 km (0.109 R)
• M77: 58,975,221 km (0.112 R)
• M78: 61,781,377 km (0.099 R)
• M79: 62,347,755 km (0.067 R)
• M80: 62,461,300 km (0.11 R)
• M81: 62,915,928 km (0.114 R)
• M82: 63,371,752 km (0.111 R)
• M83: 63,485,746 km (0.072 R)
• M84: 64,286,543 km (0.103 R)
• M85: 64,860,550 km (0.113 R)
• M86: 65,897,862 km (0.094 R)
• M87: 67,406,108 km (0.099 R)
• M88: 69,043,008 km (0.05 R)
• M89: 69,513,044 km (0.119 R)
• M90: 69,866,394 km (0.082 R)
• M91: 70,692,923 km (0.072 R)
• M92: 75,115,634 km (0.093 R)
• M93: 75,478,110 km (0.036 R)

Planet 9 - Ice Giant

Semi-Major Axis: 16.91 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 628.2

Radius: 7.1

Gravity: 12.46 G

Time & Orbit

Eccentricity (e): 0.177

Orbit Range: 13.92 AU - 19.9 AU

Year: 25148 Days

Day: 23.3 Hours

Environment

Temp: -185 °C

Axial Tilt: 35.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 86,120,450 km

• M1: 187,596 km (0.03 R)
• M2: 296,054 km (0.116 R)
• M3: 535,261 km (0.095 R)
• M4: 750,981 km (0.112 R)
• M5: 909,555 km (0.106 R)
• M6: 964,906 km (0.118 R)
• M7: 1,021,454 km (0.039 R)
• M8: 1,167,911 km (0.105 R)
• M9: 1,289,982 km (0.107 R)
• M10: 1,546,992 km (0.074 R)
• M11: 1,890,767 km (0.057 R)
• M12: 2,071,631 km (0.064 R)
• M13: 2,258,030 km (0.092 R)
• M14: 2,334,176 km (0.106 R)
• M15: 2,808,850 km (0.073 R)
• M16: 2,932,268 km (0.115 R)
• M17: 3,890,442 km (0.114 R)
• M18: 4,120,823 km (0.05 R)
• M19: 4,450,836 km (0.117 R)
• M20: 5,086,328 km (0.037 R)
• M21: 5,646,123 km (0.078 R)
• M22: 6,549,096 km (0.101 R)
• M23: 7,841,023 km (0.093 R)
• M24: 8,426,698 km (0.115 R)
• M25: 8,545,629 km (0.073 R)
• M26: 8,784,985 km (0.073 R)
• M27: 9,087,173 km (0.11 R)
• M28: 9,209,095 km (0.042 R)
• M29: 9,454,436 km (0.113 R)
• M30: 9,764,253 km (0.093 R)
• M31: 11,362,557 km (0.119 R)
• M32: 12,091,248 km (0.04 R)
• M33: 12,427,544 km (0.083 R)
• M34: 12,562,780 km (0.116 R)
• M35: 12,766,832 km (0.068 R)
• M36: 13,523,947 km (0.1 R)
• M37: 15,661,850 km (0.106 R)
• M38: 15,954,763 km (0.101 R)
• M39: 16,028,215 km (0.072 R)
• M40: 16,919,070 km (0.112 R)
• M41: 18,285,497 km (0.082 R)
• M42: 18,362,391 km (0.117 R)
• M43: 21,446,052 km (0.071 R)
• M44: 21,527,283 km (0.112 R)
• M45: 21,689,896 km (0.086 R)
• M46: 22,262,258 km (0.114 R)
• M47: 24,009,112 km (0.07 R)
• M48: 24,771,163 km (0.11 R)
• M49: 26,492,736 km (0.044 R)
• M50: 27,280,069 km (0.074 R)
• M51: 28,430,776 km (0.086 R)
• M52: 29,868,711 km (0.093 R)
• M53: 33,002,038 km (0.038 R)
• M54: 34,037,854 km (0.066 R)
• M55: 35,948,518 km (0.099 R)
• M56: 36,334,780 km (0.083 R)
• M57: 36,528,359 km (0.099 R)
• M58: 40,272,495 km (0.108 R)
• M59: 40,372,725 km (0.089 R)
• M60: 40,774,246 km (0.12 R)
• M61: 41,076,135 km (0.109 R)
• M62: 41,480,049 km (0.119 R)
• M63: 43,313,371 km (0.085 R)
• M64: 44,033,535 km (0.106 R)
• M65: 44,239,980 km (0.078 R)
• M66: 45,173,171 km (0.05 R)
• M67: 46,322,532 km (0.101 R)
• M68: 46,953,386 km (0.072 R)
• M69: 47,164,319 km (0.115 R)
• M70: 47,587,232 km (0.089 R)
• M71: 48,117,557 km (0.091 R)
• M72: 48,223,771 km (0.071 R)
• M73: 48,330,135 km (0.108 R)
• M74: 48,863,153 km (0.117 R)
• M75: 50,258,302 km (0.096 R)
• M76: 50,366,162 km (0.104 R)
• M77: 50,474,022 km (0.106 R)
• M78: 50,798,351 km (0.08 R)
• M79: 51,448,952 km (0.116 R)
• M80: 53,197,302 km (0.079 R)
• M81: 55,410,004 km (0.026 R)
• M82: 57,765,423 km (0.11 R)
• M83: 58,784,932 km (0.027 R)
• M84: 59,240,009 km (0.112 R)
• M85: 63,853,906 km (0.104 R)
• M86: 70,263,278 km (0.076 R)
• M87: 70,746,179 km (0.047 R)
• M88: 72,932,552 km (0.108 R)
• M89: 73,666,330 km (0.119 R)
• M90: 73,911,371 km (0.049 R)
• M91: 74,279,681 km (0.081 R)
• M92: 74,402,501 km (0.102 R)
• M93: 77,496,035 km (0.087 R)
• M94: 79,875,240 km (0.08 R)
• M95: 86,120,502 km (0.096 R)

Kuiper Belt

Range: 30.3 - 47.3 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 386 - 10,534 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit