G6V Star System Generated (Seed: 1768103302)
Star Details
Spectral Class: G4V
Temperature: 5,680 K
Mass: 1.02 sol
Luminosity: 1.07 lux
Habitable Zone (HZ)
Inner Boundary: 0.99 AU
Outer Boundary: 1.42 AU
Physical Limits
Snow Line: 4.97 AU
Max System Radius: 20.2 AU
Planetary System (8 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 2.57 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.26
Radius: 1.79
Gravity: 1.33 G
Time & Orbit
Eccentricity (e): 0.142
Orbit Range: 2.21 AU - 2.93 AU
Year: 1490 Days
Day: 37.4 Hours
Environment
Temp: -78 °C
Axial Tilt: 19.8 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (1)
Outer Limit: 50,136,505 km
- M1: 1,514,379 km (0.071 R)
Planet 2 - Terrestrial
Semi-Major Axis: 3.23 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.6
Radius: 1.21
Gravity: 1.09 G
Time & Orbit
Eccentricity (e): 0.154
Orbit Range: 2.73 AU - 3.73 AU
Year: 2099 Days
Day: 32.7 Hours
Environment
Temp: -102 °C
Axial Tilt: 25.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 3 - Terrestrial
Semi-Major Axis: 3.6 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 2.37
Radius: 1.41
Gravity: 1.19 G
Time & Orbit
Eccentricity (e): 0.234
Orbit Range: 2.76 AU - 4.44 AU
Year: 2470 Days
Day: 42.5 Hours
Environment
Temp: -123 °C
Axial Tilt: 21.5 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Asteroid Belt
Center: 4.85 AU
Composition
Type: Main (Rocky/Icy Mix)
A dense region of planetesimals and debris.
Boundary
Planet 4 - Gas Giant
Semi-Major Axis: 6.09 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 404.6
Radius: 14.5
Gravity: 1.92 G
Time & Orbit
Eccentricity (e): 0.162
Orbit Range: 5.1 AU - 7.08 AU
Year: 5435 Days
Day: 10.2 Hours
Environment
Temp: -141 °C
Axial Tilt: 33.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (76)
Outer Limit: 50,136,505 km
- M1: 186,997 km (0.12 R)
- M2: 291,865 km (0.096 R)
- M3: 401,221 km (0.108 R)
- M4: 532,868 km (0.11 R)
- M5: 641,775 km (0.078 R)
- M6: 793,617 km (0.09 R)
- M7: 1,085,482 km (0.03 R)
- M8: 1,204,412 km (0.09 R)
- M9: 1,314,068 km (0.068 R)
- M10: 1,603,988 km (0.094 R)
- M11: 1,741,319 km (0.085 R)
- M12: 2,061,608 km (0.036 R)
- M13: 2,246,062 km (0.084 R)
- M14: 2,631,576 km (0.116 R)
- M15: 2,777,284 km (0.053 R)
- M16: 2,981,934 km (0.081 R)
- M17: 3,076,779 km (0.117 R)
- M18: 3,308,357 km (0.094 R)
- M19: 3,545,918 km (0.026 R)
- M20: 3,646,598 km (0.111 R)
- M21: 4,313,655 km (0.09 R)
- M22: 4,443,057 km (0.104 R)
- M23: 4,595,647 km (0.06 R)
- M24: 4,839,042 km (0.094 R)
- M25: 5,200,920 km (0.089 R)
- M26: 5,998,875 km (0.07 R)
- M27: 6,095,365 km (0.061 R)
- M28: 6,338,761 km (0.084 R)
- M29: 6,709,913 km (0.103 R)
- M30: 6,910,823 km (0.079 R)
- M31: 7,113,678 km (0.107 R)
- M32: 8,077,986 km (0.118 R)
- M33: 8,211,427 km (0.036 R)
- M34: 8,318,689 km (0.116 R)
- M35: 9,221,961 km (0.077 R)
- M36: 9,614,655 km (0.094 R)
- M37: 9,870,019 km (0.105 R)
- M38: 10,041,607 km (0.03 R)
- M39: 10,678,894 km (0.068 R)
- M40: 11,329,346 km (0.071 R)
- M41: 11,629,290 km (0.09 R)
- M42: 11,719,796 km (0.102 R)
- M43: 11,931,926 km (0.09 R)
- M44: 12,359,926 km (0.091 R)
- M45: 12,514,161 km (0.042 R)
- M46: 12,637,879 km (0.116 R)
- M47: 12,762,045 km (0.041 R)
- M48: 12,886,510 km (0.062 R)
- M49: 13,642,578 km (0.071 R)
- M50: 13,961,820 km (0.097 R)
- M51: 14,154,502 km (0.04 R)
- M52: 15,164,437 km (0.115 R)
- M53: 15,895,372 km (0.061 R)
- M54: 16,808,069 km (0.056 R)
- M55: 17,013,167 km (0.108 R)
- M56: 17,668,257 km (0.087 R)
- M57: 17,772,377 km (0.069 R)
- M58: 18,542,806 km (0.072 R)
- M59: 19,217,043 km (0.118 R)
- M60: 19,431,567 km (0.054 R)
- M61: 19,539,127 km (0.107 R)
- M62: 19,790,901 km (0.116 R)
- M63: 20,406,945 km (0.06 R)
- M64: 20,698,960 km (0.089 R)
- M65: 21,102,874 km (0.063 R)
- M66: 21,398,330 km (0.104 R)
- M67: 21,881,232 km (0.087 R)
- M68: 22,518,070 km (0.089 R)
- M69: 22,782,260 km (0.119 R)
- M70: 23,085,195 km (0.069 R)
- M71: 23,504,069 km (0.117 R)
- M72: 24,156,466 km (0.088 R)
- M73: 24,970,428 km (0.056 R)
- M74: 25,518,106 km (0.086 R)
- M75: 26,069,823 km (0.118 R)
- M76: 26,267,741 km (0.078 R)
Planet 5 - Gas Giant
Semi-Major Axis: 6.44 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 690.4
Radius: 13.2
Gravity: 3.96 G
Time & Orbit
Eccentricity (e): 0.003
Orbit Range: 6.42 AU - 6.46 AU
Year: 5910 Days
Day: 5.3 Hours
Environment
Temp: -162 °C
Axial Tilt: 39.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (75)
Outer Limit: 50,136,505 km
- M1: 183,856 km (0.108 R)
- M2: 339,138 km (0.094 R)
- M3: 474,973 km (0.106 R)
- M4: 575,204 km (0.074 R)
- M5: 748,289 km (0.108 R)
- M6: 1,165,966 km (0.098 R)
- M7: 1,581,848 km (0.095 R)
- M8: 1,928,616 km (0.07 R)
- M9: 2,239,480 km (0.086 R)
- M10: 2,608,837 km (0.075 R)
- M11: 2,909,828 km (0.118 R)
- M12: 3,199,450 km (0.053 R)
- M13: 3,903,756 km (0.104 R)
- M14: 4,025,828 km (0.098 R)
- M15: 4,223,746 km (0.075 R)
- M16: 4,349,259 km (0.068 R)
- M17: 4,968,594 km (0.108 R)
- M18: 5,288,883 km (0.081 R)
- M19: 5,809,783 km (0.118 R)
- M20: 5,977,781 km (0.032 R)
- M21: 6,090,728 km (0.101 R)
- M22: 6,695,103 km (0.098 R)
- M23: 6,930,421 km (0.104 R)
- M24: 7,379,065 km (0.063 R)
- M25: 7,561,125 km (0.117 R)
- M26: 7,930,034 km (0.105 R)
- M27: 8,147,848 km (0.114 R)
- M28: 8,336,192 km (0.107 R)
- M29: 9,039,152 km (0.081 R)
- M30: 10,061,953 km (0.109 R)
- M31: 10,298,018 km (0.112 R)
- M32: 10,707,019 km (0.061 R)
- M33: 11,121,255 km (0.054 R)
- M34: 11,295,537 km (0.083 R)
- M35: 11,576,033 km (0.08 R)
- M36: 12,215,863 km (0.103 R)
- M37: 12,830,860 km (0.076 R)
- M38: 12,977,017 km (0.071 R)
- M39: 13,492,830 km (0.074 R)
- M40: 13,641,531 km (0.061 R)
- M41: 13,940,427 km (0.091 R)
- M42: 14,773,687 km (0.059 R)
- M43: 15,467,522 km (0.11 R)
- M44: 15,857,524 km (0.042 R)
- M45: 16,250,817 km (0.106 R)
- M46: 16,607,608 km (0.099 R)
- M47: 17,328,819 km (0.107 R)
- M48: 17,531,075 km (0.073 R)
- M49: 17,896,842 km (0.075 R)
- M50: 18,677,593 km (0.098 R)
- M51: 18,884,936 km (0.111 R)
- M52: 19,511,452 km (0.078 R)
- M53: 20,144,849 km (0.117 R)
- M54: 21,475,223 km (0.08 R)
- M55: 22,129,115 km (0.069 R)
- M56: 22,789,590 km (0.111 R)
- M57: 23,055,575 km (0.114 R)
- M58: 23,680,296 km (0.086 R)
- M59: 24,401,058 km (0.059 R)
- M60: 24,491,715 km (0.078 R)
- M61: 25,495,816 km (0.118 R)
- M62: 25,633,745 km (0.038 R)
- M63: 27,214,695 km (0.078 R)
- M64: 27,827,448 km (0.083 R)
- M65: 28,159,256 km (0.103 R)
- M66: 28,635,725 km (0.076 R)
- M67: 29,838,342 km (0.115 R)
- M68: 30,372,706 km (0.073 R)
- M69: 31,155,552 km (0.111 R)
- M70: 31,401,640 km (0.1 R)
- M71: 31,648,327 km (0.101 R)
- M72: 31,895,612 km (0.117 R)
- M73: 32,541,576 km (0.12 R)
- M74: 33,342,673 km (0.082 R)
- M75: 33,594,446 km (0.087 R)
Planet 6 - Gas Giant
Semi-Major Axis: 11.14 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 273.1
Radius: 13.5
Gravity: 1.5 G
Time & Orbit
Eccentricity (e): 0.132
Orbit Range: 9.67 AU - 12.61 AU
Year: 13447 Days
Day: 11 Hours
Environment
Temp: -170 °C
Axial Tilt: 120.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (64)
Outer Limit: 50,136,505 km
- M1: 280,047 km (0.101 R)
- M2: 765,941 km (0.112 R)
- M3: 861,085 km (0.11 R)
- M4: 1,064,838 km (0.026 R)
- M5: 1,687,314 km (0.05 R)
- M6: 2,386,535 km (0.107 R)
- M7: 3,168,632 km (0.117 R)
- M8: 3,275,146 km (0.104 R)
- M9: 3,825,966 km (0.076 R)
- M10: 4,141,467 km (0.076 R)
- M11: 4,287,774 km (0.056 R)
- M12: 4,615,693 km (0.074 R)
- M13: 4,859,388 km (0.073 R)
- M14: 5,264,499 km (0.082 R)
- M15: 6,510,799 km (0.108 R)
- M16: 6,784,712 km (0.08 R)
- M17: 6,957,647 km (0.117 R)
- M18: 7,273,000 km (0.101 R)
- M19: 7,917,467 km (0.047 R)
- M20: 8,136,479 km (0.06 R)
- M21: 8,994,572 km (0.077 R)
- M22: 9,725,058 km (0.099 R)
- M23: 9,842,194 km (0.068 R)
- M24: 10,394,808 km (0.117 R)
- M25: 10,715,247 km (0.1 R)
- M26: 10,998,286 km (0.114 R)
- M27: 11,448,127 km (0.092 R)
- M28: 11,696,010 km (0.118 R)
- M29: 12,833,553 km (0.112 R)
- M30: 13,005,141 km (0.091 R)
- M31: 13,567,928 km (0.088 R)
- M32: 13,698,976 km (0.088 R)
- M33: 14,404,929 km (0.078 R)
- M34: 15,258,534 km (0.111 R)
- M35: 15,806,062 km (0.094 R)
- M36: 16,313,797 km (0.109 R)
- M37: 16,779,944 km (0.117 R)
- M38: 17,014,663 km (0.112 R)
- M39: 18,012,481 km (0.083 R)
- M40: 19,274,190 km (0.069 R)
- M41: 19,668,081 km (0.077 R)
- M42: 19,915,665 km (0.108 R)
- M43: 20,214,113 km (0.106 R)
- M44: 21,371,851 km (0.081 R)
- M45: 22,396,148 km (0.078 R)
- M46: 22,654,653 km (0.087 R)
- M47: 23,541,170 km (0.058 R)
- M48: 24,758,747 km (0.084 R)
- M49: 25,834,056 km (0.108 R)
- M50: 26,541,205 km (0.115 R)
- M51: 27,089,482 km (0.116 R)
- M52: 27,199,586 km (0.11 R)
- M53: 28,030,153 km (0.103 R)
- M54: 28,532,503 km (0.099 R)
- M55: 29,943,510 km (0.114 R)
- M56: 32,891,785 km (0.102 R)
- M57: 33,776,506 km (0.04 R)
- M58: 34,191,940 km (0.105 R)
- M59: 35,569,287 km (0.112 R)
- M60: 38,687,356 km (0.118 R)
- M61: 39,746,060 km (0.083 R)
- M62: 40,688,078 km (0.109 R)
- M63: 42,146,807 km (0.083 R)
- M64: 42,914,692 km (0.059 R)
Planet 7 - Gas Giant
Semi-Major Axis: 11.73 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 476.3
Radius: 11.2
Gravity: 3.8 G
Time & Orbit
Eccentricity (e): 0.019
Orbit Range: 11.51 AU - 11.95 AU
Year: 14529 Days
Day: 9.6 Hours
Environment
Temp: -190 °C
Axial Tilt: 31.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (91)
Outer Limit: 50,136,505 km
- M1: 153,039 km (0.09 R)
- M2: 239,057 km (0.12 R)
- M3: 479,910 km (0.089 R)
- M4: 1,019,061 km (0.101 R)
- M5: 1,255,276 km (0.093 R)
- M6: 1,831,826 km (0.054 R)
- M7: 2,715,501 km (0.054 R)
- M8: 3,016,043 km (0.1 R)
- M9: 4,926,407 km (0.065 R)
- M10: 5,072,265 km (0.082 R)
- M11: 5,256,420 km (0.09 R)
- M12: 5,405,569 km (0.053 R)
- M13: 6,171,810 km (0.044 R)
- M14: 6,527,703 km (0.088 R)
- M15: 7,177,107 km (0.067 R)
- M16: 7,259,685 km (0.07 R)
- M17: 7,551,401 km (0.12 R)
- M18: 7,719,849 km (0.035 R)
- M19: 7,974,913 km (0.094 R)
- M20: 8,580,784 km (0.087 R)
- M21: 9,517,417 km (0.035 R)
- M22: 10,020,963 km (0.105 R)
- M23: 10,299,365 km (0.096 R)
- M24: 10,911,220 km (0.072 R)
- M25: 11,777,840 km (0.109 R)
- M26: 11,924,446 km (0.106 R)
- M27: 12,170,236 km (0.099 R)
- M28: 12,417,521 km (0.095 R)
- M29: 13,372,703 km (0.105 R)
- M30: 13,679,229 km (0.096 R)
- M31: 13,833,465 km (0.069 R)
- M32: 14,403,582 km (0.118 R)
- M33: 14,612,870 km (0.049 R)
- M34: 14,823,204 km (0.063 R)
- M35: 15,034,436 km (0.086 R)
- M36: 15,299,973 km (0.092 R)
- M37: 15,567,005 km (0.052 R)
- M38: 16,541,186 km (0.088 R)
- M39: 16,650,692 km (0.05 R)
- M40: 16,760,347 km (0.069 R)
- M41: 18,947,468 km (0.065 R)
- M42: 20,337,531 km (0.118 R)
- M43: 20,749,075 km (0.097 R)
- M44: 21,640,379 km (0.116 R)
- M45: 22,483,513 km (0.03 R)
- M46: 22,604,837 km (0.099 R)
- M47: 23,092,227 km (0.112 R)
- M48: 23,644,841 km (0.11 R)
- M49: 24,077,628 km (0.105 R)
- M50: 25,139,623 km (0.117 R)
- M51: 27,503,419 km (0.091 R)
- M52: 27,698,195 km (0.067 R)
- M53: 29,272,713 km (0.115 R)
- M54: 29,604,521 km (0.098 R)
- M55: 29,804,085 km (0.075 R)
- M56: 30,606,976 km (0.094 R)
- M57: 31,892,770 km (0.065 R)
- M58: 32,508,066 km (0.049 R)
- M59: 32,989,322 km (0.107 R)
- M60: 34,167,854 km (0.108 R)
- M61: 35,007,996 km (0.071 R)
- M62: 35,996,838 km (0.112 R)
- M63: 36,067,747 km (0.082 R)
- M64: 36,209,865 km (0.118 R)
- M65: 37,641,218 km (0.063 R)
- M66: 37,929,643 km (0.088 R)
- M67: 38,001,898 km (0.102 R)
- M68: 38,074,154 km (0.092 R)
- M69: 38,146,410 km (0.093 R)
- M70: 38,945,113 km (0.094 R)
- M71: 39,969,409 km (0.07 R)
- M72: 40,043,012 km (0.05 R)
- M73: 40,411,172 km (0.073 R)
- M74: 40,928,631 km (0.067 R)
- M75: 41,820,683 km (0.112 R)
- M76: 42,568,972 km (0.111 R)
- M77: 42,794,416 km (0.07 R)
- M78: 45,222,838 km (0.056 R)
- M79: 45,452,770 km (0.118 R)
- M80: 45,606,257 km (0.114 R)
- M81: 45,836,788 km (0.074 R)
- M82: 46,763,098 km (0.078 R)
- M83: 48,869,735 km (0.11 R)
- M84: 49,736,954 km (0.094 R)
- M85: 50,450,087 km (0.093 R)
- M86: 51,406,466 km (0.11 R)
- M87: 51,646,421 km (0.101 R)
- M88: 51,886,825 km (0.045 R)
- M89: 53,255,944 km (0.046 R)
- M90: 53,823,220 km (0.112 R)
- M91: 53,904,302 km (0.032 R)
Planet 8 - Ice Giant
Semi-Major Axis: 14.32 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 204.1
Radius: 3.7
Gravity: 14.91 G
Time & Orbit
Eccentricity (e): 0.082
Orbit Range: 13.15 AU - 15.49 AU
Year: 19598 Days
Day: 17.1 Hours
Environment
Temp: -187 °C
Axial Tilt: 33 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (91)
Outer Limit: 50,136,505 km
- M1: 128,953 km (0.057 R)
- M2: 187,745 km (0.087 R)
- M3: 220,806 km (0.12 R)
- M4: 346,319 km (0.099 R)
- M5: 606,021 km (0.074 R)
- M6: 914,641 km (0.117 R)
- M7: 1,726,060 km (0.039 R)
- M8: 1,799,214 km (0.075 R)
- M9: 2,102,299 km (0.097 R)
- M10: 2,669,873 km (0.117 R)
- M11: 2,754,695 km (0.069 R)
- M12: 2,956,054 km (0.111 R)
- M13: 2,985,226 km (0.118 R)
- M14: 3,132,280 km (0.11 R)
- M15: 3,342,316 km (0.118 R)
- M16: 3,587,955 km (0.077 R)
- M17: 5,250,137 km (0.08 R)
- M18: 5,320,897 km (0.104 R)
- M19: 5,571,174 km (0.072 R)
- M20: 5,679,633 km (0.069 R)
- M21: 5,898,644 km (0.113 R)
- M22: 6,420,292 km (0.114 R)
- M23: 6,572,134 km (0.075 R)
- M24: 7,507,270 km (0.062 R)
- M25: 7,667,190 km (0.108 R)
- M26: 8,691,636 km (0.077 R)
- M27: 8,943,858 km (0.1 R)
- M28: 9,241,109 km (0.069 R)
- M29: 9,889,018 km (0.099 R)
- M30: 10,373,416 km (0.097 R)
- M31: 10,462,426 km (0.098 R)
- M32: 11,001,128 km (0.074 R)
- M33: 11,228,218 km (0.045 R)
- M34: 12,058,636 km (0.115 R)
- M35: 12,245,782 km (0.112 R)
- M36: 12,292,756 km (0.105 R)
- M37: 12,481,100 km (0.086 R)
- M38: 14,915,506 km (0.061 R)
- M39: 15,066,151 km (0.072 R)
- M40: 15,217,245 km (0.103 R)
- M41: 15,318,224 km (0.109 R)
- M42: 15,419,501 km (0.106 R)
- M43: 18,450,803 km (0.07 R)
- M44: 18,991,599 km (0.12 R)
- M45: 19,045,903 km (0.058 R)
- M46: 20,533,205 km (0.098 R)
- M47: 20,700,755 km (0.101 R)
- M48: 21,375,441 km (0.081 R)
- M49: 21,658,780 km (0.087 R)
- M50: 22,573,421 km (0.119 R)
- M51: 23,910,377 km (0.115 R)
- M52: 24,027,812 km (0.119 R)
- M53: 25,332,604 km (0.057 R)
- M54: 25,512,271 km (0.099 R)
- M55: 25,872,952 km (0.044 R)
- M56: 26,174,691 km (0.11 R)
- M57: 27,026,052 km (0.107 R)
- M58: 28,133,824 km (0.094 R)
- M59: 28,195,907 km (0.116 R)
- M60: 29,823,233 km (0.12 R)
- M61: 30,839,751 km (0.089 R)
- M62: 30,903,629 km (0.11 R)
- M63: 30,967,657 km (0.104 R)
- M64: 31,932,264 km (0.11 R)
- M65: 32,126,292 km (0.093 R)
- M66: 34,220,962 km (0.089 R)
- M67: 34,685,014 km (0.049 R)
- M68: 34,818,007 km (0.105 R)
- M69: 35,017,720 km (0.055 R)
- M70: 35,284,752 km (0.082 R)
- M71: 36,968,476 km (0.028 R)
- M72: 37,580,930 km (0.108 R)
- M73: 37,991,277 km (0.115 R)
- M74: 38,196,824 km (0.107 R)
- M75: 38,471,636 km (0.085 R)
- M76: 39,230,695 km (0.103 R)
- M77: 39,716,290 km (0.09 R)
- M78: 39,855,416 km (0.09 R)
- M79: 41,396,424 km (0.085 R)
- M80: 41,961,455 km (0.065 R)
- M81: 42,387,061 km (0.116 R)
- M82: 43,099,446 km (0.047 R)
- M83: 43,457,134 km (0.114 R)
- M84: 43,600,449 km (0.099 R)
- M85: 43,672,256 km (0.087 R)
- M86: 44,608,290 km (0.074 R)
- M87: 45,187,682 km (0.101 R)
- M88: 47,308,681 km (0.046 R)
- M89: 47,382,433 km (0.086 R)
- M90: 48,790,149 km (0.101 R)
- M91: 49,312,245 km (0.092 R)
Kuiper Belt
Range: 30.3 - 51.3 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 431 - 18,748 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.