G1V Star System Generated (Seed: 1767142031)
Star Details
Spectral Class: G3V
Temperature: 5,760 K
Mass: 1.04 sol
Luminosity: 1.15 lux
Habitable Zone (HZ)
Inner Boundary: 1.02 AU
Outer Boundary: 1.47 AU
Physical Limits
Snow Line: 5.15 AU
Max System Radius: 20.4 AU
Planetary System (8 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 2.23 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.87
Radius: 1.72
Gravity: 1.31 G
Time & Orbit
Eccentricity (e): 0.142
Orbit Range: 1.91 AU - 2.55 AU
Year: 1193 Days
Day: 23.2 Hours
Environment
Temp: -68 °C
Axial Tilt: 8.1 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 2 - Terrestrial
Semi-Major Axis: 2.31 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.14
Radius: 1.77
Gravity: 1.32 G
Time & Orbit
Eccentricity (e): 0.165
Orbit Range: 1.93 AU - 2.69 AU
Year: 1257 Days
Day: 15.2 Hours
Environment
Temp: -75 °C
Axial Tilt: 38.6 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 3 - Terrestrial
Semi-Major Axis: 3.09 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.53
Radius: 1.19
Gravity: 1.08 G
Time & Orbit
Eccentricity (e): 0.161
Orbit Range: 2.59 AU - 3.59 AU
Year: 1945 Days
Day: 45.5 Hours
Environment
Temp: -95 °C
Axial Tilt: 2.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (1)
Outer Limit: 51,188,042 km
- M1: 146,008 km (0.055 R)
Planet 4 - Gas Giant
Semi-Major Axis: 5.63 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 732.3
Radius: 9.6
Gravity: 7.95 G
Time & Orbit
Eccentricity (e): 0.167
Orbit Range: 4.69 AU - 6.57 AU
Year: 4784 Days
Day: 6.5 Hours
Environment
Temp: -132 °C
Axial Tilt: 43.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (77)
Outer Limit: 51,188,042 km
- M1: 133,292 km (0.108 R)
- M2: 569,220 km (0.074 R)
- M3: 648,956 km (0.061 R)
- M4: 732,730 km (0.034 R)
- M5: 1,007,691 km (0.114 R)
- M6: 1,106,575 km (0.086 R)
- M7: 1,268,889 km (0.029 R)
- M8: 1,376,300 km (0.107 R)
- M9: 1,551,480 km (0.117 R)
- M10: 1,906,475 km (0.084 R)
- M11: 2,212,553 km (0.104 R)
- M12: 2,612,128 km (0.118 R)
- M13: 2,911,474 km (0.093 R)
- M14: 3,075,732 km (0.1 R)
- M15: 3,499,693 km (0.088 R)
- M16: 3,919,614 km (0.088 R)
- M17: 4,262,492 km (0.067 R)
- M18: 4,402,366 km (0.111 R)
- M19: 4,496,463 km (0.081 R)
- M20: 4,662,966 km (0.111 R)
- M21: 4,782,943 km (0.064 R)
- M22: 5,001,805 km (0.055 R)
- M23: 5,348,722 km (0.07 R)
- M24: 5,935,445 km (0.094 R)
- M25: 6,462,478 km (0.062 R)
- M26: 6,596,518 km (0.114 R)
- M27: 6,677,451 km (0.04 R)
- M28: 6,812,986 km (0.052 R)
- M29: 7,280,928 km (0.056 R)
- M30: 7,759,193 km (0.116 R)
- M31: 8,393,189 km (0.085 R)
- M32: 8,835,101 km (0.065 R)
- M33: 9,133,848 km (0.087 R)
- M34: 9,224,205 km (0.109 R)
- M35: 9,436,035 km (0.05 R)
- M36: 9,588,326 km (0.102 R)
- M37: 9,895,450 km (0.1 R)
- M38: 10,236,982 km (0.104 R)
- M39: 11,349,392 km (0.058 R)
- M40: 11,837,829 km (0.086 R)
- M41: 12,399,719 km (0.06 R)
- M42: 13,004,244 km (0.082 R)
- M43: 13,139,779 km (0.119 R)
- M44: 14,067,585 km (0.09 R)
- M45: 14,662,536 km (0.098 R)
- M46: 15,660,503 km (0.102 R)
- M47: 16,975,469 km (0.078 R)
- M48: 17,272,421 km (0.113 R)
- M49: 17,796,312 km (0.115 R)
- M50: 17,909,259 km (0.082 R)
- M51: 17,984,806 km (0.112 R)
- M52: 18,098,051 km (0.111 R)
- M53: 18,173,748 km (0.115 R)
- M54: 18,744,912 km (0.075 R)
- M55: 19,709,819 km (0.093 R)
- M56: 21,008,179 km (0.109 R)
- M57: 21,447,099 km (0.052 R)
- M58: 21,848,769 km (0.067 R)
- M59: 21,969,794 km (0.097 R)
- M60: 22,131,359 km (0.039 R)
- M61: 22,618,749 km (0.092 R)
- M62: 23,150,719 km (0.095 R)
- M63: 23,438,845 km (0.094 R)
- M64: 24,603,315 km (0.119 R)
- M65: 25,616,391 km (0.08 R)
- M66: 26,042,446 km (0.07 R)
- M67: 26,213,586 km (0.08 R)
- M68: 26,342,091 km (0.051 R)
- M69: 26,599,997 km (0.105 R)
- M70: 26,729,100 km (0.04 R)
- M71: 26,815,418 km (0.078 R)
- M72: 27,334,822 km (0.038 R)
- M73: 27,421,738 km (0.081 R)
- M74: 28,164,193 km (0.119 R)
- M75: 28,427,784 km (0.112 R)
- M76: 29,179,065 km (0.12 R)
- M77: 29,847,468 km (0.049 R)
Planet 5 - Gas Giant
Semi-Major Axis: 7.58 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 353.6
Radius: 14.3
Gravity: 1.73 G
Time & Orbit
Eccentricity (e): 0.212
Orbit Range: 5.97 AU - 9.19 AU
Year: 7474 Days
Day: 10.1 Hours
Environment
Temp: -165 °C
Axial Tilt: 26.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (73)
Outer Limit: 51,188,042 km
- M1: 188,942 km (0.051 R)
- M2: 384,018 km (0.118 R)
- M3: 488,587 km (0.115 R)
- M4: 675,734 km (0.099 R)
- M5: 824,583 km (0.112 R)
- M6: 999,912 km (0.061 R)
- M7: 1,158,785 km (0.075 R)
- M8: 1,519,765 km (0.118 R)
- M9: 1,845,140 km (0.037 R)
- M10: 1,934,600 km (0.103 R)
- M11: 2,025,555 km (0.092 R)
- M12: 2,562,612 km (0.12 R)
- M13: 2,724,327 km (0.099 R)
- M14: 2,889,483 km (0.086 R)
- M15: 3,903,457 km (0.083 R)
- M16: 4,066,968 km (0.083 R)
- M17: 4,546,878 km (0.112 R)
- M18: 5,352,313 km (0.108 R)
- M19: 5,958,633 km (0.07 R)
- M20: 6,531,443 km (0.1 R)
- M21: 6,642,594 km (0.085 R)
- M22: 7,583,565 km (0.075 R)
- M23: 7,700,550 km (0.09 R)
- M24: 7,965,787 km (0.043 R)
- M25: 8,384,512 km (0.104 R)
- M26: 9,026,287 km (0.107 R)
- M27: 9,274,918 km (0.096 R)
- M28: 9,525,794 km (0.08 R)
- M29: 10,227,558 km (0.11 R)
- M30: 10,389,423 km (0.107 R)
- M31: 11,311,394 km (0.077 R)
- M32: 11,411,774 km (0.091 R)
- M33: 12,743,345 km (0.067 R)
- M34: 13,198,123 km (0.06 R)
- M35: 14,594,319 km (0.068 R)
- M36: 14,849,982 km (0.04 R)
- M37: 14,996,588 km (0.086 R)
- M38: 15,365,496 km (0.103 R)
- M39: 15,625,647 km (0.108 R)
- M40: 15,887,144 km (0.118 R)
- M41: 16,300,932 km (0.1 R)
- M42: 16,794,755 km (0.11 R)
- M43: 17,486,495 km (0.035 R)
- M44: 17,680,374 km (0.082 R)
- M45: 18,581,103 km (0.097 R)
- M46: 19,496,941 km (0.087 R)
- M47: 19,697,851 km (0.072 R)
- M48: 20,264,528 km (0.093 R)
- M49: 20,427,290 km (0.095 R)
- M50: 20,877,430 km (0.098 R)
- M51: 21,206,845 km (0.048 R)
- M52: 21,330,861 km (0.112 R)
- M53: 21,496,616 km (0.09 R)
- M54: 21,745,846 km (0.104 R)
- M55: 22,079,898 km (0.092 R)
- M56: 22,331,521 km (0.094 R)
- M57: 22,837,461 km (0.073 R)
- M58: 23,304,655 km (0.066 R)
- M59: 24,291,702 km (0.071 R)
- M60: 25,073,800 km (0.084 R)
- M61: 25,687,750 km (0.047 R)
- M62: 26,218,074 km (0.106 R)
- M63: 26,975,338 km (0.098 R)
- M64: 27,604,397 km (0.107 R)
- M65: 28,557,186 km (0.078 R)
- M66: 29,060,583 km (0.114 R)
- M67: 29,382,368 km (0.107 R)
- M68: 30,122,578 km (0.116 R)
- M69: 30,215,479 km (0.119 R)
- M70: 30,401,578 km (0.05 R)
- M71: 30,541,602 km (0.118 R)
- M72: 30,634,951 km (0.107 R)
- M73: 31,150,166 km (0.048 R)
Planet 6 - Gas Giant
Semi-Major Axis: 11.02 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 812.3
Radius: 12.5
Gravity: 5.2 G
Time & Orbit
Eccentricity (e): 0.065
Orbit Range: 10.3 AU - 11.74 AU
Year: 13102 Days
Day: 5.7 Hours
Environment
Temp: -176 °C
Axial Tilt: 43 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (86)
Outer Limit: 51,188,042 km
- M1: 157,377 km (0.089 R)
- M2: 266,733 km (0.066 R)
- M3: 518,656 km (0.092 R)
- M4: 622,178 km (0.107 R)
- M5: 1,090,868 km (0.094 R)
- M6: 1,350,570 km (0.032 R)
- M7: 1,500,915 km (0.11 R)
- M8: 1,901,688 km (0.083 R)
- M9: 1,986,061 km (0.051 R)
- M10: 2,549,447 km (0.102 R)
- M11: 2,737,491 km (0.035 R)
- M12: 3,535,746 km (0.034 R)
- M13: 4,477,763 km (0.09 R)
- M14: 4,899,031 km (0.057 R)
- M15: 5,333,014 km (0.097 R)
- M16: 5,534,523 km (0.098 R)
- M17: 5,903,581 km (0.086 R)
- M18: 6,408,025 km (0.045 R)
- M19: 6,970,363 km (0.114 R)
- M20: 7,775,200 km (0.111 R)
- M21: 8,050,011 km (0.065 R)
- M22: 8,188,688 km (0.094 R)
- M23: 8,281,439 km (0.093 R)
- M24: 8,562,234 km (0.119 R)
- M25: 8,656,481 km (0.073 R)
- M26: 9,133,100 km (0.096 R)
- M27: 9,326,230 km (0.12 R)
- M28: 9,471,939 km (0.1 R)
- M29: 10,211,700 km (0.074 R)
- M30: 10,563,405 km (0.113 R)
- M31: 10,766,110 km (0.11 R)
- M32: 13,407,560 km (0.116 R)
- M33: 13,572,267 km (0.085 R)
- M34: 14,293,329 km (0.082 R)
- M35: 14,461,626 km (0.091 R)
- M36: 14,630,373 km (0.075 R)
- M37: 15,599,617 km (0.092 R)
- M38: 16,648,448 km (0.116 R)
- M39: 17,300,695 km (0.079 R)
- M40: 17,720,017 km (0.068 R)
- M41: 21,321,885 km (0.1 R)
- M42: 22,549,785 km (0.092 R)
- M43: 23,139,350 km (0.104 R)
- M44: 23,667,730 km (0.113 R)
- M45: 24,669,138 km (0.036 R)
- M46: 24,871,095 km (0.089 R)
- M47: 25,616,242 km (0.045 R)
- M48: 27,128,527 km (0.068 R)
- M49: 27,825,354 km (0.097 R)
- M50: 29,951,438 km (0.07 R)
- M51: 30,167,009 km (0.1 R)
- M52: 30,310,922 km (0.081 R)
- M53: 30,527,241 km (0.109 R)
- M54: 30,816,563 km (0.098 R)
- M55: 33,908,302 km (0.099 R)
- M56: 36,100,061 km (0.098 R)
- M57: 36,252,950 km (0.094 R)
- M58: 36,405,988 km (0.09 R)
- M59: 39,590,927 km (0.059 R)
- M60: 40,381,103 km (0.098 R)
- M61: 40,698,699 km (0.117 R)
- M62: 41,017,193 km (0.04 R)
- M63: 41,176,664 km (0.094 R)
- M64: 41,896,978 km (0.106 R)
- M65: 42,621,481 km (0.097 R)
- M66: 43,025,844 km (0.058 R)
- M67: 45,560,929 km (0.085 R)
- M68: 46,971,487 km (0.06 R)
- M69: 47,054,963 km (0.103 R)
- M70: 47,305,539 km (0.116 R)
- M71: 48,396,407 km (0.032 R)
- M72: 49,071,991 km (0.117 R)
- M73: 49,156,664 km (0.036 R)
- M74: 49,920,660 km (0.093 R)
- M75: 50,091,052 km (0.084 R)
- M76: 52,150,117 km (0.11 R)
- M77: 52,669,072 km (0.098 R)
- M78: 53,276,888 km (0.088 R)
- M79: 53,974,313 km (0.108 R)
- M80: 55,466,403 km (0.12 R)
- M81: 55,642,778 km (0.116 R)
- M82: 55,996,278 km (0.109 R)
- M83: 57,685,238 km (0.04 R)
- M84: 58,042,927 km (0.069 R)
- M85: 59,390,803 km (0.075 R)
- M86: 60,749,003 km (0.117 R)
Planet 7 - Gas Giant
Semi-Major Axis: 12.41 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 510.3
Radius: 9.9
Gravity: 5.21 G
Time & Orbit
Eccentricity (e): 0.237
Orbit Range: 9.47 AU - 15.35 AU
Year: 15658 Days
Day: 12.3 Hours
Environment
Temp: -177 °C
Axial Tilt: 5.5 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (71)
Outer Limit: 51,188,042 km
- M1: 200,012 km (0.12 R)
- M2: 300,991 km (0.082 R)
- M3: 590,912 km (0.085 R)
- M4: 718,818 km (0.102 R)
- M5: 1,300,155 km (0.093 R)
- M6: 1,546,543 km (0.114 R)
- M7: 3,384,801 km (0.119 R)
- M8: 4,330,260 km (0.068 R)
- M9: 4,625,417 km (0.079 R)
- M10: 4,737,914 km (0.093 R)
- M11: 4,965,453 km (0.096 R)
- M12: 5,080,493 km (0.082 R)
- M13: 5,391,956 km (0.1 R)
- M14: 5,549,931 km (0.029 R)
- M15: 5,749,794 km (0.062 R)
- M16: 6,404,883 km (0.059 R)
- M17: 7,083,609 km (0.111 R)
- M18: 7,213,460 km (0.055 R)
- M19: 7,387,891 km (0.118 R)
- M20: 7,475,555 km (0.075 R)
- M21: 10,509,101 km (0.089 R)
- M22: 11,459,795 km (0.12 R)
- M23: 12,022,732 km (0.095 R)
- M24: 13,282,047 km (0.09 R)
- M25: 14,199,381 km (0.041 R)
- M26: 17,245,942 km (0.088 R)
- M27: 18,008,741 km (0.077 R)
- M28: 18,722,473 km (0.119 R)
- M29: 20,300,581 km (0.111 R)
- M30: 20,918,869 km (0.111 R)
- M31: 21,105,567 km (0.102 R)
- M32: 21,167,949 km (0.116 R)
- M33: 21,794,914 km (0.102 R)
- M34: 22,364,283 km (0.117 R)
- M35: 23,066,944 km (0.074 R)
- M36: 23,841,712 km (0.111 R)
- M37: 24,625,156 km (0.075 R)
- M38: 24,690,680 km (0.118 R)
- M39: 24,953,972 km (0.092 R)
- M40: 25,749,234 km (0.115 R)
- M41: 25,949,396 km (0.096 R)
- M42: 26,485,555 km (0.088 R)
- M43: 27,296,675 km (0.08 R)
- M44: 29,012,562 km (0.117 R)
- M45: 29,638,779 km (0.107 R)
- M46: 30,058,850 km (0.081 R)
- M47: 32,044,612 km (0.105 R)
- M48: 32,619,816 km (0.04 R)
- M49: 33,561,684 km (0.072 R)
- M50: 34,659,583 km (0.113 R)
- M51: 34,806,937 km (0.115 R)
- M52: 34,880,539 km (0.108 R)
- M53: 35,028,192 km (0.108 R)
- M54: 38,403,419 km (0.113 R)
- M55: 38,784,894 km (0.093 R)
- M56: 39,551,433 km (0.094 R)
- M57: 39,859,455 km (0.089 R)
- M58: 40,013,840 km (0.061 R)
- M59: 40,710,667 km (0.113 R)
- M60: 40,788,308 km (0.069 R)
- M61: 42,825,382 km (0.038 R)
- M62: 46,104,119 km (0.088 R)
- M63: 48,471,655 km (0.109 R)
- M64: 50,044,078 km (0.093 R)
- M65: 50,627,659 km (0.036 R)
- M66: 53,493,955 km (0.095 R)
- M67: 54,518,102 km (0.115 R)
- M68: 56,672,461 km (0.071 R)
- M69: 56,759,227 km (0.118 R)
- M70: 57,541,923 km (0.07 R)
- M71: 58,415,874 km (0.118 R)
Planet 8 - Ice Giant
Semi-Major Axis: 14.83 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 199.4
Radius: 5
Gravity: 7.98 G
Time & Orbit
Eccentricity (e): 0.083
Orbit Range: 13.6 AU - 16.06 AU
Year: 20454 Days
Day: 15.6 Hours
Environment
Temp: -196 °C
Axial Tilt: 37.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (93)
Outer Limit: 51,188,042 km
- M1: 396,883 km (0.062 R)
- M2: 502,200 km (0.106 R)
- M3: 1,262,606 km (0.104 R)
- M4: 1,374,206 km (0.105 R)
- M5: 1,582,895 km (0.04 R)
- M6: 2,030,043 km (0.03 R)
- M7: 2,797,929 km (0.096 R)
- M8: 2,914,316 km (0.09 R)
- M9: 3,395,722 km (0.094 R)
- M10: 3,677,415 km (0.098 R)
- M11: 4,982,207 km (0.103 R)
- M12: 5,087,973 km (0.084 R)
- M13: 5,849,277 km (0.054 R)
- M14: 7,596,580 km (0.073 R)
- M15: 8,046,421 km (0.055 R)
- M16: 8,673,984 km (0.103 R)
- M17: 8,716,320 km (0.101 R)
- M18: 8,886,562 km (0.119 R)
- M19: 9,798,212 km (0.09 R)
- M20: 9,975,186 km (0.113 R)
- M21: 10,784,810 km (0.086 R)
- M22: 11,197,550 km (0.083 R)
- M23: 12,466,290 km (0.085 R)
- M24: 12,947,696 km (0.033 R)
- M25: 13,288,180 km (0.067 R)
- M26: 13,928,459 km (0.113 R)
- M27: 14,077,758 km (0.059 R)
- M28: 14,327,586 km (0.086 R)
- M29: 14,679,740 km (0.087 R)
- M30: 14,933,159 km (0.088 R)
- M31: 15,136,761 km (0.112 R)
- M32: 15,187,924 km (0.084 R)
- M33: 15,341,411 km (0.089 R)
- M34: 15,392,723 km (0.11 R)
- M35: 16,640,968 km (0.098 R)
- M36: 16,693,776 km (0.036 R)
- M37: 17,011,223 km (0.097 R)
- M38: 17,491,133 km (0.103 R)
- M39: 17,759,661 km (0.06 R)
- M40: 17,921,376 km (0.084 R)
- M41: 18,137,844 km (0.113 R)
- M42: 18,957,341 km (0.11 R)
- M43: 19,067,595 km (0.112 R)
- M44: 19,844,756 km (0.103 R)
- M45: 20,349,798 km (0.04 R)
- M46: 21,659,677 km (0.114 R)
- M47: 22,937,842 km (0.111 R)
- M48: 23,882,702 km (0.078 R)
- M49: 24,121,011 km (0.119 R)
- M50: 24,300,080 km (0.118 R)
- M51: 24,479,747 km (0.064 R)
- M52: 24,900,566 km (0.059 R)
- M53: 25,810,270 km (0.051 R)
- M54: 26,730,896 km (0.095 R)
- M55: 28,415,068 km (0.115 R)
- M56: 28,730,570 km (0.095 R)
- M57: 29,047,419 km (0.027 R)
- M58: 29,110,848 km (0.089 R)
- M59: 30,972,294 km (0.109 R)
- M60: 31,231,996 km (0.088 R)
- M61: 31,753,644 km (0.113 R)
- M62: 31,819,018 km (0.037 R)
- M63: 31,884,542 km (0.112 R)
- M64: 32,937,861 km (0.116 R)
- M65: 33,335,791 km (0.116 R)
- M66: 33,802,088 km (0.091 R)
- M67: 33,868,958 km (0.078 R)
- M68: 34,876,051 km (0.105 R)
- M69: 35,146,225 km (0.064 R)
- M70: 38,582,188 km (0.069 R)
- M71: 38,721,763 km (0.04 R)
- M72: 39,774,483 km (0.086 R)
- M73: 40,127,534 km (0.102 R)
- M74: 40,339,814 km (0.064 R)
- M75: 40,623,451 km (0.109 R)
- M76: 40,978,896 km (0.073 R)
- M77: 42,123,469 km (0.113 R)
- M78: 42,339,189 km (0.069 R)
- M79: 42,916,338 km (0.041 R)
- M80: 43,060,999 km (0.116 R)
- M81: 44,224,422 km (0.074 R)
- M82: 44,736,645 km (0.104 R)
- M83: 44,810,097 km (0.115 R)
- M84: 45,250,962 km (0.095 R)
- M85: 45,619,422 km (0.114 R)
- M86: 46,062,830 km (0.069 R)
- M87: 47,028,634 km (0.096 R)
- M88: 47,103,283 km (0.056 R)
- M89: 47,851,123 km (0.084 R)
- M90: 49,813,847 km (0.037 R)
- M91: 49,889,843 km (0.113 R)
- M92: 50,194,274 km (0.094 R)
- M93: 51,034,715 km (0.066 R)
Kuiper Belt
Range: 30.6 - 47.6 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 467 - 18,849 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.