Star System Generated (Seed: 1766332110)
Star Details
Spectral Class: M3V
Temperature: 3,267 K
Mass: 0.31 sol
Luminosity: 0.02 lux
Habitable Zone (HZ)
Inner Boundary: 0.13 AU
Outer Boundary: 0.19 AU
Physical Limits
Snow Line: 0.68 AU
Max System Radius: 11.1 AU
Planetary System (10 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 0.51 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 2.68
Radius: 1.48
Gravity: 1.22 G
Time & Orbit
Eccentricity (e): 0.018
Orbit Range: 0.5 AU - 0.52 AU
Year: 239 Days
Day: 18.5 Hours
Environment
Temp: -124 °C
Axial Tilt: 14.9 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 2 - Terrestrial
Semi-Major Axis: 0.61 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.23
Radius: 1.09
Gravity: 1.04 G
Time & Orbit
Eccentricity (e): 0.042
Orbit Range: 0.58 AU - 0.64 AU
Year: 313 Days
Day: 21.8 Hours
Environment
Temp: -125 °C
Axial Tilt: 16.6 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (1)
Outer Limit: 86,777,424 km
- M1: 220,806 km (0.102 R)
Planet 3 - Terrestrial
Semi-Major Axis: 0.62 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.47
Radius: 1.17
Gravity: 1.07 G
Time & Orbit
Eccentricity (e): 0.122
Orbit Range: 0.54 AU - 0.7 AU
Year: 320 Days
Day: 20.8 Hours
Environment
Temp: -123 °C
Axial Tilt: 1.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 4 - Terrestrial
Semi-Major Axis: 0.63 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.96
Radius: 1.73
Gravity: 1.32 G
Time & Orbit
Eccentricity (e): 0.209
Orbit Range: 0.5 AU - 0.76 AU
Year: 328 Days
Day: 46.1 Hours
Environment
Temp: -134 °C
Axial Tilt: 23.5 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (1)
Outer Limit: 86,777,424 km
- M1: 46,525 km (0.091 R)
Planet 5 - Gas Giant
Semi-Major Axis: 1.08 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 282.8
Radius: 11.2
Gravity: 2.25 G
Time & Orbit
Eccentricity (e): 0.198
Orbit Range: 0.87 AU - 1.29 AU
Year: 736 Days
Day: 7.4 Hours
Environment
Temp: -161 °C
Axial Tilt: 36 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (44)
Outer Limit: 86,777,424 km
- M1: 146,307 km (0.113 R)
- M2: 416,780 km (0.106 R)
- M3: 520,601 km (0.037 R)
- M4: 603,627 km (0.045 R)
- M5: 699,968 km (0.086 R)
- M6: 855,550 km (0.05 R)
- M7: 1,033,123 km (0.072 R)
- M8: 1,187,209 km (0.055 R)
- M9: 1,269,936 km (0.091 R)
- M10: 1,349,373 km (0.075 R)
- M11: 1,513,482 km (0.077 R)
- M12: 1,626,727 km (0.099 R)
- M13: 1,707,660 km (0.107 R)
- M14: 1,867,879 km (0.116 R)
- M15: 1,977,534 km (0.087 R)
- M16: 2,051,884 km (0.065 R)
- M17: 2,242,023 km (0.119 R)
- M18: 2,491,403 km (0.098 R)
- M19: 2,687,825 km (0.103 R)
- M20: 2,882,302 km (0.116 R)
- M21: 2,974,305 km (0.058 R)
- M22: 3,263,478 km (0.056 R)
- M23: 3,344,560 km (0.117 R)
- M24: 3,561,776 km (0.117 R)
- M25: 3,645,401 km (0.069 R)
- M26: 3,845,712 km (0.097 R)
- M27: 3,916,023 km (0.086 R)
- M28: 3,986,634 km (0.111 R)
- M29: 4,081,479 km (0.047 R)
- M30: 4,177,072 km (0.102 R)
- M31: 4,525,934 km (0.099 R)
- M32: 4,625,117 km (0.112 R)
- M33: 4,724,899 km (0.081 R)
- M34: 4,833,806 km (0.108 R)
- M35: 5,037,110 km (0.086 R)
- M36: 5,174,291 km (0.1 R)
- M37: 5,338,849 km (0.073 R)
- M38: 5,417,388 km (0.099 R)
- M39: 5,505,052 km (0.047 R)
- M40: 5,584,489 km (0.095 R)
- M41: 5,655,248 km (0.103 R)
- M42: 6,005,158 km (0.114 R)
- M43: 6,077,862 km (0.109 R)
- M44: 6,159,842 km (0.114 R)
Planet 6 - Gas Giant
Semi-Major Axis: 1.61 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 185.3
Radius: 11.8
Gravity: 1.33 G
Time & Orbit
Eccentricity (e): 0.156
Orbit Range: 1.36 AU - 1.86 AU
Year: 1340 Days
Day: 12.9 Hours
Environment
Temp: -191 °C
Axial Tilt: 41.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (52)
Outer Limit: 86,777,424 km
- M1: 147,504 km (0.086 R)
- M2: 225,444 km (0.083 R)
- M3: 347,815 km (0.087 R)
- M4: 457,620 km (0.052 R)
- M5: 591,510 km (0.086 R)
- M6: 710,440 km (0.108 R)
- M7: 849,118 km (0.096 R)
- M8: 963,709 km (0.084 R)
- M9: 1,113,457 km (0.111 R)
- M10: 1,234,182 km (0.052 R)
- M11: 1,321,548 km (0.109 R)
- M12: 1,450,052 km (0.09 R)
- M13: 1,734,139 km (0.109 R)
- M14: 1,818,661 km (0.032 R)
- M15: 2,065,947 km (0.074 R)
- M16: 2,155,855 km (0.106 R)
- M17: 2,254,739 km (0.063 R)
- M18: 2,402,243 km (0.101 R)
- M19: 2,617,514 km (0.093 R)
- M20: 2,715,351 km (0.083 R)
- M21: 2,822,613 km (0.098 R)
- M22: 2,897,711 km (0.112 R)
- M23: 3,032,947 km (0.085 R)
- M24: 3,231,164 km (0.099 R)
- M25: 3,371,637 km (0.085 R)
- M26: 3,514,204 km (0.068 R)
- M27: 3,832,997 km (0.112 R)
- M28: 3,907,197 km (0.031 R)
- M29: 4,010,121 km (0.052 R)
- M30: 4,142,365 km (0.081 R)
- M31: 4,276,106 km (0.111 R)
- M32: 4,450,088 km (0.099 R)
- M33: 4,577,246 km (0.104 R)
- M34: 4,666,107 km (0.117 R)
- M35: 4,935,832 km (0.106 R)
- M36: 5,087,973 km (0.092 R)
- M37: 5,210,943 km (0.068 R)
- M38: 5,334,660 km (0.051 R)
- M39: 5,438,631 km (0.107 R)
- M40: 5,680,381 km (0.067 R)
- M41: 6,011,890 km (0.064 R)
- M42: 6,240,026 km (0.101 R)
- M43: 6,360,602 km (0.096 R)
- M44: 6,626,587 km (0.05 R)
- M45: 6,716,047 km (0.089 R)
- M46: 6,828,544 km (0.071 R)
- M47: 7,043,816 km (0.086 R)
- M48: 7,204,035 km (0.106 R)
- M49: 7,296,038 km (0.094 R)
- M50: 7,656,419 km (0.096 R)
- M51: 7,809,308 km (0.117 R)
- M52: 7,998,998 km (0.047 R)
Asteroid Belt
Center: 2.28 AU
Composition
Type: Outer System (Icy)
A dense region of planetesimals and debris.
Boundary
Planet 7 - Gas Giant
Semi-Major Axis: 2.95 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 389.6
Radius: 12
Gravity: 2.71 G
Time & Orbit
Eccentricity (e): 0.118
Orbit Range: 2.6 AU - 3.3 AU
Year: 3324 Days
Day: 8.7 Hours
Environment
Temp: -212 °C
Axial Tilt: 46.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (78)
Outer Limit: 86,777,424 km
- M1: 152,291 km (0.105 R)
- M2: 311,912 km (0.032 R)
- M3: 553,213 km (0.088 R)
- M4: 756,068 km (0.117 R)
- M5: 935,136 km (0.06 R)
- M6: 1,097,450 km (0.084 R)
- M7: 1,314,217 km (0.075 R)
- M8: 1,557,164 km (0.053 R)
- M9: 1,739,823 km (0.11 R)
- M10: 1,815,071 km (0.12 R)
- M11: 2,060,411 km (0.093 R)
- M12: 2,427,973 km (0.115 R)
- M13: 2,555,281 km (0.106 R)
- M14: 2,670,322 km (0.055 R)
- M15: 2,950,519 km (0.117 R)
- M16: 3,025,916 km (0.076 R)
- M17: 3,178,656 km (0.098 R)
- M18: 3,523,778 km (0.089 R)
- M19: 3,700,902 km (0.098 R)
- M20: 3,815,194 km (0.089 R)
- M21: 3,897,623 km (0.11 R)
- M22: 4,047,370 km (0.117 R)
- M23: 4,267,279 km (0.096 R)
- M24: 4,473,724 km (0.118 R)
- M25: 4,736,418 km (0.057 R)
- M26: 4,878,686 km (0.03 R)
- M27: 4,968,295 km (0.092 R)
- M28: 5,131,057 km (0.082 R)
- M29: 5,277,214 km (0.105 R)
- M30: 5,387,767 km (0.071 R)
- M31: 5,686,365 km (0.12 R)
- M32: 5,818,609 km (0.115 R)
- M33: 5,894,754 km (0.115 R)
- M34: 5,990,348 km (0.092 R)
- M35: 6,086,539 km (0.077 R)
- M36: 6,338,911 km (0.07 R)
- M37: 6,417,150 km (0.097 R)
- M38: 6,515,586 km (0.115 R)
- M39: 7,238,891 km (0.081 R)
- M40: 7,341,516 km (0.1 R)
- M41: 7,547,961 km (0.065 R)
- M42: 7,630,987 km (0.078 R)
- M43: 7,798,238 km (0.05 R)
- M44: 8,051,357 km (0.08 R)
- M45: 8,157,572 km (0.095 R)
- M46: 8,371,497 km (0.055 R)
- M47: 8,826,873 km (0.098 R)
- M48: 8,958,369 km (0.109 R)
- M49: 9,401,777 km (0.117 R)
- M50: 9,536,116 km (0.082 R)
- M51: 10,011,688 km (0.102 R)
- M52: 11,246,170 km (0.079 R)
- M53: 11,676,263 km (0.083 R)
- M54: 12,111,743 km (0.052 R)
- M55: 12,626,659 km (0.108 R)
- M56: 13,475,627 km (0.106 R)
- M57: 13,652,601 km (0.097 R)
- M58: 14,239,922 km (0.109 R)
- M59: 14,861,501 km (0.066 R)
- M60: 15,123,148 km (0.114 R)
- M61: 15,359,812 km (0.092 R)
- M62: 15,439,099 km (0.072 R)
- M63: 15,597,822 km (0.083 R)
- M64: 15,704,036 km (0.079 R)
- M65: 15,837,179 km (0.099 R)
- M66: 15,917,213 km (0.118 R)
- M67: 16,481,048 km (0.113 R)
- M68: 16,969,634 km (0.096 R)
- M69: 17,298,002 km (0.116 R)
- M70: 17,490,534 km (0.087 R)
- M71: 17,933,194 km (0.054 R)
- M72: 18,239,870 km (0.115 R)
- M73: 18,351,769 km (0.117 R)
- M74: 18,519,917 km (0.03 R)
- M75: 18,660,539 km (0.085 R)
- M76: 18,773,336 km (0.109 R)
- M77: 18,858,158 km (0.096 R)
- M78: 19,027,952 km (0.111 R)
Planet 8 - Gas Giant
Semi-Major Axis: 3.24 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 50.9
Radius: 11.8
Gravity: 0.37 G
Time & Orbit
Eccentricity (e): 0.195
Orbit Range: 2.61 AU - 3.87 AU
Year: 3826 Days
Day: 12.4 Hours
Environment
Temp: -196 °C
Axial Tilt: 0.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (30)
Outer Limit: 86,777,424 km
- M1: 147,653 km (0.109 R)
- M2: 267,331 km (0.105 R)
- M3: 361,877 km (0.036 R)
- M4: 468,092 km (0.073 R)
- M5: 835,953 km (0.033 R)
- M6: 1,014,124 km (0.086 R)
- M7: 1,227,451 km (0.032 R)
- M8: 1,393,504 km (0.032 R)
- M9: 1,910,963 km (0.101 R)
- M10: 2,343,301 km (0.092 R)
- M11: 2,465,822 km (0.12 R)
- M12: 2,561,415 km (0.067 R)
- M13: 2,717,296 km (0.093 R)
- M14: 2,936,606 km (0.106 R)
- M15: 3,446,286 km (0.099 R)
- M16: 3,651,534 km (0.117 R)
- M17: 3,995,011 km (0.101 R)
- M18: 4,291,215 km (0.099 R)
- M19: 4,689,444 km (0.104 R)
- M20: 5,136,443 km (0.097 R)
- M21: 5,210,344 km (0.116 R)
- M22: 5,597,354 km (0.053 R)
- M23: 6,123,490 km (0.112 R)
- M24: 7,031,100 km (0.102 R)
- M25: 7,937,813 km (0.111 R)
- M26: 8,267,526 km (0.101 R)
- M27: 8,470,381 km (0.091 R)
- M28: 8,807,275 km (0.053 R)
- M29: 9,951,849 km (0.073 R)
- M30: 10,028,742 km (0.028 R)
Planet 9 - Ice Giant
Semi-Major Axis: 6.84 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 714.7
Radius: 6.4
Gravity: 17.45 G
Time & Orbit
Eccentricity (e): 0.125
Orbit Range: 5.99 AU - 7.7 AU
Year: 11735 Days
Day: 19.4 Hours
Environment
Temp: -213 °C
Axial Tilt: 35.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (88)
Outer Limit: 86,777,424 km
- M1: 388,805 km (0.106 R)
- M2: 578,046 km (0.052 R)
- M3: 629,957 km (0.107 R)
- M4: 795,262 km (0.096 R)
- M5: 893,249 km (0.119 R)
- M6: 995,424 km (0.09 R)
- M7: 1,188,854 km (0.084 R)
- M8: 1,711,250 km (0.034 R)
- M9: 1,813,126 km (0.08 R)
- M10: 1,891,067 km (0.07 R)
- M11: 2,240,976 km (0.113 R)
- M12: 2,381,000 km (0.089 R)
- M13: 2,495,143 km (0.118 R)
- M14: 2,581,910 km (0.036 R)
- M15: 3,154,720 km (0.057 R)
- M16: 3,375,377 km (0.095 R)
- M17: 3,699,406 km (0.069 R)
- M18: 4,204,149 km (0.118 R)
- M19: 4,342,377 km (0.09 R)
- M20: 4,982,955 km (0.076 R)
- M21: 5,055,959 km (0.027 R)
- M22: 5,239,965 km (0.056 R)
- M23: 5,805,445 km (0.092 R)
- M24: 5,998,276 km (0.085 R)
- M25: 6,193,053 km (0.095 R)
- M26: 6,350,579 km (0.093 R)
- M27: 6,911,870 km (0.091 R)
- M28: 6,993,401 km (0.069 R)
- M29: 7,953,371 km (0.119 R)
- M30: 7,996,156 km (0.046 R)
- M31: 8,210,679 km (0.102 R)
- M32: 8,253,763 km (0.115 R)
- M33: 8,514,213 km (0.065 R)
- M34: 8,601,578 km (0.088 R)
- M35: 9,266,691 km (0.09 R)
- M36: 10,364,739 km (0.062 R)
- M37: 11,071,738 km (0.099 R)
- M38: 11,119,460 km (0.12 R)
- M39: 11,794,147 km (0.035 R)
- M40: 11,842,915 km (0.097 R)
- M41: 11,891,684 km (0.111 R)
- M42: 12,087,508 km (0.12 R)
- M43: 12,185,794 km (0.048 R)
- M44: 12,731,078 km (0.092 R)
- M45: 13,589,471 km (0.099 R)
- M46: 13,794,270 km (0.04 R)
- M47: 14,206,711 km (0.069 R)
- M48: 15,096,520 km (0.08 R)
- M49: 15,149,477 km (0.062 R)
- M50: 15,255,392 km (0.094 R)
- M51: 16,166,443 km (0.098 R)
- M52: 16,492,118 km (0.11 R)
- M53: 17,760,558 km (0.042 R)
- M54: 18,152,954 km (0.044 R)
- M55: 18,831,978 km (0.084 R)
- M56: 21,273,715 km (0.082 R)
- M57: 22,109,369 km (0.089 R)
- M58: 22,834,320 km (0.066 R)
- M59: 23,016,829 km (0.088 R)
- M60: 23,199,638 km (0.101 R)
- M61: 24,431,576 km (0.095 R)
- M62: 27,862,005 km (0.047 R)
- M63: 28,056,931 km (0.088 R)
- M64: 30,098,044 km (0.041 R)
- M65: 30,231,336 km (0.096 R)
- M66: 30,968,106 km (0.064 R)
- M67: 32,186,281 km (0.116 R)
- M68: 33,489,279 km (0.114 R)
- M69: 33,765,735 km (0.048 R)
- M70: 36,146,436 km (0.089 R)
- M71: 36,928,085 km (0.102 R)
- M72: 37,285,324 km (0.078 R)
- M73: 37,428,490 km (0.12 R)
- M74: 37,643,611 km (0.117 R)
- M75: 37,787,225 km (0.115 R)
- M76: 42,031,616 km (0.111 R)
- M77: 42,628,811 km (0.074 R)
- M78: 43,303,946 km (0.106 R)
- M79: 44,740,834 km (0.107 R)
- M80: 45,350,595 km (0.097 R)
- M81: 47,041,350 km (0.096 R)
- M82: 47,894,506 km (0.087 R)
- M83: 47,972,297 km (0.108 R)
- M84: 49,537,390 km (0.12 R)
- M85: 49,852,443 km (0.096 R)
- M86: 51,836,261 km (0.063 R)
- M87: 52,797,726 km (0.075 R)
- M88: 53,039,027 km (0.032 R)
Planet 10 - Ice Giant
Semi-Major Axis: 11 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 709.6
Radius: 6.9
Gravity: 14.9 G
Time & Orbit
Eccentricity (e): 0.083
Orbit Range: 10.09 AU - 11.91 AU
Year: 23933 Days
Day: 20.9 Hours
Environment
Temp: -234 °C
Axial Tilt: 12 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (81)
Outer Limit: 86,777,424 km
- M1: 147,803 km (0.081 R)
- M2: 470,485 km (0.09 R)
- M3: 805,585 km (0.103 R)
- M4: 969,095 km (0.04 R)
- M5: 1,084,285 km (0.119 R)
- M6: 1,203,964 km (0.078 R)
- M7: 1,622,987 km (0.112 R)
- M8: 3,077,677 km (0.088 R)
- M9: 3,248,518 km (0.067 R)
- M10: 3,734,711 km (0.103 R)
- M11: 4,102,422 km (0.114 R)
- M12: 4,290,766 km (0.063 R)
- M13: 5,122,081 km (0.088 R)
- M14: 5,530,334 km (0.091 R)
- M15: 6,323,801 km (0.078 R)
- M16: 6,651,121 km (0.035 R)
- M17: 6,872,377 km (0.079 R)
- M18: 7,096,175 km (0.081 R)
- M19: 8,073,498 km (0.061 R)
- M20: 9,153,744 km (0.101 R)
- M21: 10,024,853 km (0.106 R)
- M22: 10,214,991 km (0.074 R)
- M23: 10,534,532 km (0.05 R)
- M24: 13,206,500 km (0.102 R)
- M25: 14,401,937 km (0.086 R)
- M26: 16,669,541 km (0.086 R)
- M27: 16,819,737 km (0.109 R)
- M28: 17,348,566 km (0.1 R)
- M29: 18,113,460 km (0.071 R)
- M30: 19,045,754 km (0.048 R)
- M31: 19,517,735 km (0.08 R)
- M32: 19,596,872 km (0.083 R)
- M33: 20,473,366 km (0.119 R)
- M34: 22,928,118 km (0.093 R)
- M35: 25,647,059 km (0.117 R)
- M36: 27,486,066 km (0.11 R)
- M37: 27,663,339 km (0.088 R)
- M38: 27,752,200 km (0.114 R)
- M39: 28,197,703 km (0.092 R)
- M40: 32,125,544 km (0.11 R)
- M41: 32,593,187 km (0.054 R)
- M42: 32,686,985 km (0.067 R)
- M43: 33,251,867 km (0.119 R)
- M44: 33,630,050 km (0.083 R)
- M45: 34,009,879 km (0.091 R)
- M46: 34,105,023 km (0.112 R)
- M47: 35,639,598 km (0.041 R)
- M48: 36,805,265 km (0.092 R)
- M49: 37,491,022 km (0.073 R)
- M50: 37,786,178 km (0.09 R)
- M51: 37,983,348 km (0.111 R)
- M52: 38,874,951 km (0.08 R)
- M53: 40,678,952 km (0.115 R)
- M54: 42,510,030 km (0.039 R)
- M55: 43,745,709 km (0.117 R)
- M56: 46,780,152 km (0.11 R)
- M57: 47,842,147 km (0.115 R)
- M58: 49,989,924 km (0.118 R)
- M59: 50,857,741 km (0.097 R)
- M60: 53,823,519 km (0.062 R)
- M61: 54,936,078 km (0.111 R)
- M62: 59,576,155 km (0.112 R)
- M63: 59,920,530 km (0.031 R)
- M64: 62,233,612 km (0.075 R)
- M65: 64,222,515 km (0.108 R)
- M66: 64,457,983 km (0.059 R)
- M67: 65,994,801 km (0.081 R)
- M68: 66,351,144 km (0.109 R)
- M69: 68,502,810 km (0.089 R)
- M70: 69,587,095 km (0.108 R)
- M71: 70,798,688 km (0.061 R)
- M72: 71,528,875 km (0.109 R)
- M73: 73,857,815 km (0.09 R)
- M74: 74,351,339 km (0.106 R)
- M75: 74,598,474 km (0.1 R)
- M76: 75,341,527 km (0.1 R)
- M77: 75,465,543 km (0.076 R)
- M78: 76,086,973 km (0.055 R)
- M79: 77,334,918 km (0.101 R)
- M80: 77,585,345 km (0.091 R)
- M81: 83,803,830 km (0.061 R)
Kuiper Belt
Range: 30 - 49 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 459 - 14,999 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.