G8V Star System Generated (Seed: 1767408586)
Star Details
Spectral Class: G7V
Temperature: 5,440 K
Mass: 0.96 sol
Luminosity: 0.87 lux
Habitable Zone (HZ)
Inner Boundary: 0.89 AU
Outer Boundary: 1.28 AU
Physical Limits
Snow Line: 4.48 AU
Max System Radius: 19.6 AU
Planetary System (8 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 1.94 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.27
Radius: 1.1
Gravity: 1.05 G
Time & Orbit
Eccentricity (e): 0.059
Orbit Range: 1.83 AU - 2.05 AU
Year: 1007 Days
Day: 39.9 Hours
Environment
Temp: -60 °C
Axial Tilt: 10.8 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 2 - Terrestrial
Semi-Major Axis: 2.18 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.64
Radius: 1.68
Gravity: 1.29 G
Time & Orbit
Eccentricity (e): 0.04
Orbit Range: 2.09 AU - 2.27 AU
Year: 1200 Days
Day: 45.7 Hours
Environment
Temp: -74 °C
Axial Tilt: 35.8 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 3 - Terrestrial
Semi-Major Axis: 3.42 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.31
Radius: 1.61
Gravity: 1.28 G
Time & Orbit
Eccentricity (e): 0.007
Orbit Range: 3.4 AU - 3.44 AU
Year: 2358 Days
Day: 43.9 Hours
Environment
Temp: -119 °C
Axial Tilt: 4.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (2)
Outer Limit: 55,891,928 km
- M1: 96,640 km (0.074 R)
- M2: 730,786 km (0.116 R)
Planet 4 - Gas Giant
Semi-Major Axis: 6.43 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 874.5
Radius: 11.7
Gravity: 6.39 G
Time & Orbit
Eccentricity (e): 0.052
Orbit Range: 6.1 AU - 6.76 AU
Year: 6078 Days
Day: 10 Hours
Environment
Temp: -157 °C
Axial Tilt: 3.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (80)
Outer Limit: 55,891,928 km
- M1: 172,038 km (0.091 R)
- M2: 301,290 km (0.095 R)
- M3: 442,810 km (0.119 R)
- M4: 719,267 km (0.069 R)
- M5: 955,182 km (0.102 R)
- M6: 1,050,327 km (0.065 R)
- M7: 1,268,291 km (0.12 R)
- M8: 1,538,614 km (0.067 R)
- M9: 1,671,158 km (0.113 R)
- M10: 1,927,868 km (0.071 R)
- M11: 2,050,837 km (0.105 R)
- M12: 2,283,013 km (0.096 R)
- M13: 2,727,618 km (0.036 R)
- M14: 3,126,895 km (0.057 R)
- M15: 3,773,307 km (0.093 R)
- M16: 4,460,709 km (0.099 R)
- M17: 4,680,169 km (0.05 R)
- M18: 4,959,469 km (0.098 R)
- M19: 5,129,711 km (0.091 R)
- M20: 5,330,771 km (0.118 R)
- M21: 5,622,486 km (0.078 R)
- M22: 5,711,198 km (0.101 R)
- M23: 5,889,668 km (0.069 R)
- M24: 6,344,296 km (0.1 R)
- M25: 6,653,664 km (0.105 R)
- M26: 6,778,728 km (0.112 R)
- M27: 8,646,009 km (0.084 R)
- M28: 8,851,407 km (0.117 R)
- M29: 9,162,570 km (0.078 R)
- M30: 9,442,169 km (0.115 R)
- M31: 10,261,666 km (0.069 R)
- M32: 10,515,534 km (0.086 R)
- M33: 10,625,039 km (0.082 R)
- M34: 10,734,994 km (0.104 R)
- M35: 10,992,751 km (0.049 R)
- M36: 11,215,352 km (0.094 R)
- M37: 11,552,097 km (0.084 R)
- M38: 11,740,740 km (0.076 R)
- M39: 11,892,283 km (0.115 R)
- M40: 12,120,868 km (0.103 R)
- M41: 12,932,287 km (0.086 R)
- M42: 13,088,916 km (0.08 R)
- M43: 13,364,475 km (0.106 R)
- M44: 13,483,106 km (0.049 R)
- M45: 13,641,830 km (0.075 R)
- M46: 14,162,281 km (0.095 R)
- M47: 14,729,855 km (0.119 R)
- M48: 15,057,624 km (0.098 R)
- M49: 15,387,787 km (0.077 R)
- M50: 16,945,699 km (0.112 R)
- M51: 17,203,007 km (0.098 R)
- M52: 17,504,896 km (0.055 R)
- M53: 19,937,507 km (0.066 R)
- M54: 21,539,849 km (0.103 R)
- M55: 21,911,899 km (0.058 R)
- M56: 23,135,909 km (0.074 R)
- M57: 23,612,528 km (0.035 R)
- M58: 23,708,121 km (0.042 R)
- M59: 24,623,959 km (0.088 R)
- M60: 24,915,525 km (0.055 R)
- M61: 25,404,112 km (0.061 R)
- M62: 27,995,297 km (0.076 R)
- M63: 28,707,083 km (0.094 R)
- M64: 28,809,408 km (0.052 R)
- M65: 29,116,682 km (0.058 R)
- M66: 29,425,004 km (0.109 R)
- M67: 30,200,669 km (0.11 R)
- M68: 30,565,089 km (0.039 R)
- M69: 30,773,928 km (0.117 R)
- M70: 31,192,951 km (0.073 R)
- M71: 31,877,960 km (0.047 R)
- M72: 32,995,007 km (0.054 R)
- M73: 33,209,381 km (0.116 R)
- M74: 33,746,886 km (0.087 R)
- M75: 34,179,074 km (0.108 R)
- M76: 34,504,450 km (0.047 R)
- M77: 34,613,058 km (0.088 R)
- M78: 35,212,796 km (0.087 R)
- M79: 35,761,072 km (0.103 R)
- M80: 36,810,501 km (0.116 R)
Planet 5 - Gas Giant
Semi-Major Axis: 7.63 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 584.5
Radius: 9.6
Gravity: 6.34 G
Time & Orbit
Eccentricity (e): 0.226
Orbit Range: 5.91 AU - 9.35 AU
Year: 7857 Days
Day: 10.5 Hours
Environment
Temp: -170 °C
Axial Tilt: 37.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (78)
Outer Limit: 55,891,928 km
- M1: 132,993 km (0.073 R)
- M2: 361,279 km (0.092 R)
- M3: 525,238 km (0.076 R)
- M4: 644,617 km (0.118 R)
- M5: 1,042,248 km (0.112 R)
- M6: 1,285,195 km (0.098 R)
- M7: 1,358,049 km (0.056 R)
- M8: 1,565,841 km (0.077 R)
- M9: 1,991,148 km (0.113 R)
- M10: 2,206,269 km (0.077 R)
- M11: 3,215,008 km (0.059 R)
- M12: 3,391,384 km (0.079 R)
- M13: 3,648,991 km (0.071 R)
- M14: 3,993,366 km (0.061 R)
- M15: 4,265,484 km (0.061 R)
- M16: 4,487,637 km (0.103 R)
- M17: 4,656,683 km (0.079 R)
- M18: 4,799,249 km (0.082 R)
- M19: 5,030,378 km (0.112 R)
- M20: 6,083,846 km (0.109 R)
- M21: 7,039,627 km (0.106 R)
- M22: 7,269,409 km (0.062 R)
- M23: 7,736,454 km (0.061 R)
- M24: 7,905,499 km (0.114 R)
- M25: 8,385,709 km (0.07 R)
- M26: 8,734,421 km (0.083 R)
- M27: 8,804,732 km (0.112 R)
- M28: 9,554,517 km (0.093 R)
- M29: 9,663,274 km (0.113 R)
- M30: 10,324,796 km (0.111 R)
- M31: 11,729,969 km (0.052 R)
- M32: 11,885,401 km (0.105 R)
- M33: 12,002,536 km (0.08 R)
- M34: 12,514,311 km (0.087 R)
- M35: 12,712,977 km (0.034 R)
- M36: 12,792,862 km (0.058 R)
- M37: 12,872,747 km (0.065 R)
- M38: 13,477,721 km (0.088 R)
- M39: 13,927,412 km (0.105 R)
- M40: 14,340,302 km (0.036 R)
- M41: 14,673,606 km (0.119 R)
- M42: 15,093,827 km (0.109 R)
- M43: 15,946,235 km (0.086 R)
- M44: 17,253,721 km (0.059 R)
- M45: 17,430,695 km (0.118 R)
- M46: 17,563,837 km (0.088 R)
- M47: 18,279,513 km (0.12 R)
- M48: 18,913,360 km (0.115 R)
- M49: 20,109,843 km (0.117 R)
- M50: 20,202,893 km (0.105 R)
- M51: 20,342,767 km (0.073 R)
- M52: 20,623,413 km (0.096 R)
- M53: 21,283,289 km (0.04 R)
- M54: 21,615,845 km (0.096 R)
- M55: 21,711,139 km (0.09 R)
- M56: 22,963,124 km (0.079 R)
- M57: 24,139,561 km (0.056 R)
- M58: 24,436,663 km (0.103 R)
- M59: 25,385,711 km (0.1 R)
- M60: 26,194,138 km (0.095 R)
- M61: 26,601,493 km (0.053 R)
- M62: 27,319,563 km (0.091 R)
- M63: 27,732,752 km (0.042 R)
- M64: 28,148,036 km (0.08 R)
- M65: 28,722,342 km (0.061 R)
- M66: 29,247,730 km (0.074 R)
- M67: 29,723,451 km (0.115 R)
- M68: 29,988,688 km (0.052 R)
- M69: 30,575,262 km (0.057 R)
- M70: 33,896,035 km (0.064 R)
- M71: 34,117,739 km (0.098 R)
- M72: 34,562,643 km (0.062 R)
- M73: 35,852,326 km (0.086 R)
- M74: 36,531,650 km (0.083 R)
- M75: 36,702,042 km (0.094 R)
- M76: 37,386,602 km (0.111 R)
- M77: 37,730,378 km (0.119 R)
- M78: 38,710,244 km (0.113 R)
Planet 6 - Gas Giant
Semi-Major Axis: 9.76 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 489.7
Radius: 11
Gravity: 4.05 G
Time & Orbit
Eccentricity (e): 0.056
Orbit Range: 9.21 AU - 10.31 AU
Year: 11367 Days
Day: 13.1 Hours
Environment
Temp: -181 °C
Axial Tilt: 48.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (80)
Outer Limit: 55,891,928 km
- M1: 481,556 km (0.113 R)
- M2: 641,625 km (0.065 R)
- M3: 803,789 km (0.099 R)
- M4: 872,754 km (0.101 R)
- M5: 980,315 km (0.099 R)
- M6: 1,209,798 km (0.117 R)
- M7: 1,435,541 km (0.045 R)
- M8: 1,834,818 km (0.101 R)
- M9: 1,975,589 km (0.082 R)
- M10: 2,071,631 km (0.055 R)
- M11: 2,318,318 km (0.072 R)
- M12: 2,706,674 km (0.071 R)
- M13: 3,199,749 km (0.108 R)
- M14: 3,428,035 km (0.098 R)
- M15: 4,175,576 km (0.053 R)
- M16: 4,299,742 km (0.112 R)
- M17: 4,393,839 km (0.056 R)
- M18: 4,841,735 km (0.104 R)
- M19: 4,972,334 km (0.093 R)
- M20: 5,954,743 km (0.112 R)
- M21: 6,450,211 km (0.1 R)
- M22: 6,522,018 km (0.115 R)
- M23: 7,784,624 km (0.048 R)
- M24: 8,443,902 km (0.04 R)
- M25: 8,522,591 km (0.06 R)
- M26: 8,760,302 km (0.097 R)
- M27: 9,120,982 km (0.076 R)
- M28: 9,939,881 km (0.069 R)
- M29: 10,106,533 km (0.068 R)
- M30: 11,691,373 km (0.085 R)
- M31: 11,779,187 km (0.038 R)
- M32: 11,911,431 km (0.059 R)
- M33: 12,490,076 km (0.092 R)
- M34: 12,579,984 km (0.088 R)
- M35: 13,214,878 km (0.115 R)
- M36: 13,398,284 km (0.03 R)
- M37: 13,813,867 km (0.093 R)
- M38: 14,139,991 km (0.114 R)
- M39: 14,374,560 km (0.094 R)
- M40: 14,942,733 km (0.1 R)
- M41: 15,518,386 km (0.075 R)
- M42: 15,857,524 km (0.099 R)
- M43: 16,247,974 km (0.103 R)
- M44: 16,395,328 km (0.096 R)
- M45: 18,095,358 km (0.098 R)
- M46: 18,248,098 km (0.074 R)
- M47: 18,708,710 km (0.047 R)
- M48: 18,863,095 km (0.043 R)
- M49: 19,955,907 km (0.084 R)
- M50: 20,855,439 km (0.06 R)
- M51: 21,444,556 km (0.115 R)
- M52: 21,552,266 km (0.092 R)
- M53: 21,984,903 km (0.073 R)
- M54: 22,093,511 km (0.094 R)
- M55: 22,693,997 km (0.077 R)
- M56: 23,300,018 km (0.117 R)
- M57: 24,078,824 km (0.048 R)
- M58: 24,415,270 km (0.066 R)
- M59: 24,640,415 km (0.106 R)
- M60: 25,605,022 km (0.071 R)
- M61: 27,045,799 km (0.084 R)
- M62: 28,217,300 km (0.069 R)
- M63: 28,750,018 km (0.114 R)
- M64: 30,428,057 km (0.079 R)
- M65: 30,731,143 km (0.119 R)
- M66: 32,570,149 km (0.069 R)
- M67: 33,440,510 km (0.077 R)
- M68: 34,129,857 km (0.088 R)
- M69: 34,444,611 km (0.076 R)
- M70: 34,697,281 km (0.073 R)
- M71: 37,971,081 km (0.074 R)
- M72: 38,231,980 km (0.09 R)
- M73: 39,347,531 km (0.105 R)
- M74: 41,074,339 km (0.1 R)
- M75: 41,275,249 km (0.093 R)
- M76: 41,745,136 km (0.117 R)
- M77: 41,879,774 km (0.088 R)
- M78: 42,893,749 km (0.039 R)
- M79: 43,029,434 km (0.085 R)
- M80: 44,464,078 km (0.111 R)
Planet 7 - Ice Giant
Semi-Major Axis: 13.63 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 903
Radius: 8
Gravity: 14.11 G
Time & Orbit
Eccentricity (e): 0.174
Orbit Range: 11.26 AU - 16 AU
Year: 18759 Days
Day: 23.2 Hours
Environment
Temp: -193 °C
Axial Tilt: 110.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (99)
Outer Limit: 55,891,928 km
- M1: 119,678 km (0.082 R)
- M2: 261,048 km (0.116 R)
- M3: 622,327 km (0.035 R)
- M4: 992,133 km (0.059 R)
- M5: 1,546,543 km (0.105 R)
- M6: 1,838,707 km (0.119 R)
- M7: 2,586,547 km (0.087 R)
- M8: 2,662,244 km (0.049 R)
- M9: 3,294,744 km (0.085 R)
- M10: 4,192,480 km (0.115 R)
- M11: 4,326,670 km (0.113 R)
- M12: 4,737,765 km (0.059 R)
- M13: 4,877,639 km (0.084 R)
- M14: 5,402,129 km (0.087 R)
- M15: 6,452,455 km (0.091 R)
- M16: 6,921,744 km (0.108 R)
- M17: 7,455,958 km (0.029 R)
- M18: 7,948,135 km (0.1 R)
- M19: 8,003,486 km (0.115 R)
- M20: 8,058,987 km (0.08 R)
- M21: 8,226,088 km (0.102 R)
- M22: 8,963,755 km (0.109 R)
- M23: 9,545,541 km (0.065 R)
- M24: 11,802,374 km (0.103 R)
- M25: 13,813,419 km (0.079 R)
- M26: 14,147,620 km (0.107 R)
- M27: 14,960,535 km (0.11 R)
- M28: 15,997,996 km (0.102 R)
- M29: 16,702,453 km (0.045 R)
- M30: 17,130,003 km (0.055 R)
- M31: 17,273,318 km (0.098 R)
- M32: 17,345,125 km (0.09 R)
- M33: 17,995,726 km (0.07 R)
- M34: 18,507,501 km (0.108 R)
- M35: 19,172,314 km (0.097 R)
- M36: 19,321,163 km (0.093 R)
- M37: 23,720,538 km (0.085 R)
- M38: 25,661,420 km (0.097 R)
- M39: 25,743,400 km (0.106 R)
- M40: 26,319,651 km (0.088 R)
- M41: 27,736,642 km (0.083 R)
- M42: 28,242,732 km (0.081 R)
- M43: 29,264,036 km (0.118 R)
- M44: 30,210,841 km (0.066 R)
- M45: 30,731,442 km (0.06 R)
- M46: 31,167,669 km (0.117 R)
- M47: 31,255,034 km (0.083 R)
- M48: 33,827,220 km (0.114 R)
- M49: 34,007,037 km (0.075 R)
- M50: 34,458,224 km (0.108 R)
- M51: 35,366,283 km (0.065 R)
- M52: 37,298,938 km (0.101 R)
- M53: 38,700,221 km (0.108 R)
- M54: 39,076,759 km (0.075 R)
- M55: 40,118,708 km (0.114 R)
- M56: 40,213,852 km (0.034 R)
- M57: 41,073,741 km (0.075 R)
- M58: 43,494,085 km (0.116 R)
- M59: 44,869,488 km (0.078 R)
- M60: 44,968,372 km (0.118 R)
- M61: 45,166,140 km (0.088 R)
- M62: 45,463,391 km (0.118 R)
- M63: 45,562,575 km (0.113 R)
- M64: 47,260,511 km (0.078 R)
- M65: 47,562,249 km (0.116 R)
- M66: 50,923,863 km (0.1 R)
- M67: 51,130,009 km (0.108 R)
- M68: 54,150,689 km (0.115 R)
- M69: 54,677,423 km (0.093 R)
- M70: 55,205,653 km (0.037 R)
- M71: 56,587,339 km (0.115 R)
- M72: 57,121,703 km (0.044 R)
- M73: 57,228,815 km (0.069 R)
- M74: 58,411,087 km (0.082 R)
- M75: 58,626,957 km (0.114 R)
- M76: 59,384,520 km (0.113 R)
- M77: 59,492,979 km (0.097 R)
- M78: 59,601,437 km (0.105 R)
- M79: 59,710,045 km (0.112 R)
- M80: 60,036,318 km (0.08 R)
- M81: 60,472,246 km (0.111 R)
- M82: 63,109,657 km (0.096 R)
- M83: 64,219,673 km (0.099 R)
- M84: 64,330,974 km (0.063 R)
- M85: 65,224,073 km (0.084 R)
- M86: 67,022,688 km (0.1 R)
- M87: 67,588,019 km (0.032 R)
- M88: 69,522,170 km (0.061 R)
- M89: 69,636,462 km (0.063 R)
- M90: 69,865,347 km (0.053 R)
- M91: 71,013,511 km (0.063 R)
- M92: 71,474,422 km (0.107 R)
- M93: 72,863,289 km (0.051 R)
- M94: 73,910,922 km (0.05 R)
- M95: 74,144,295 km (0.047 R)
- M96: 74,494,952 km (0.053 R)
- M97: 75,197,913 km (0.114 R)
- M98: 76,492,383 km (0.091 R)
- M99: 77,201,477 km (0.117 R)
Planet 8 - Ice Giant
Semi-Major Axis: 19.39 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 107.2
Radius: 7
Gravity: 2.19 G
Time & Orbit
Eccentricity (e): 0.223
Orbit Range: 15.07 AU - 23.71 AU
Year: 31829 Days
Day: 23.3 Hours
Environment
Temp: -195 °C
Axial Tilt: 5.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (63)
Outer Limit: 55,891,928 km
- M1: 106,813 km (0.099 R)
- M2: 269,127 km (0.109 R)
- M3: 362,625 km (0.088 R)
- M4: 452,384 km (0.086 R)
- M5: 2,122,943 km (0.077 R)
- M6: 2,465,074 km (0.083 R)
- M7: 2,979,092 km (0.09 R)
- M8: 3,759,544 km (0.104 R)
- M9: 4,242,596 km (0.062 R)
- M10: 4,929,399 km (0.117 R)
- M11: 5,767,148 km (0.087 R)
- M12: 5,845,537 km (0.11 R)
- M13: 6,122,592 km (0.112 R)
- M14: 8,757,011 km (0.118 R)
- M15: 9,394,597 km (0.106 R)
- M16: 9,533,124 km (0.03 R)
- M17: 11,101,658 km (0.113 R)
- M18: 12,953,380 km (0.109 R)
- M19: 15,385,243 km (0.084 R)
- M20: 15,932,323 km (0.107 R)
- M21: 17,611,110 km (0.099 R)
- M22: 17,782,100 km (0.09 R)
- M23: 18,994,292 km (0.051 R)
- M24: 19,111,128 km (0.1 R)
- M25: 19,228,114 km (0.072 R)
- M26: 19,580,716 km (0.112 R)
- M27: 20,411,881 km (0.117 R)
- M28: 20,711,526 km (0.12 R)
- M29: 21,012,667 km (0.073 R)
- M30: 21,193,979 km (0.095 R)
- M31: 22,787,346 km (0.06 R)
- M32: 23,035,828 km (0.056 R)
- M33: 23,347,740 km (0.03 R)
- M34: 23,723,978 km (0.078 R)
- M35: 26,870,321 km (0.077 R)
- M36: 27,264,511 km (0.079 R)
- M37: 27,925,734 km (0.075 R)
- M38: 28,258,290 km (0.068 R)
- M39: 32,350,540 km (0.098 R)
- M40: 32,699,851 km (0.06 R)
- M41: 33,190,980 km (0.043 R)
- M42: 34,109,511 km (0.037 R)
- M43: 35,323,199 km (0.071 R)
- M44: 35,682,982 km (0.108 R)
- M45: 36,842,066 km (0.085 R)
- M46: 39,644,034 km (0.116 R)
- M47: 44,904,045 km (0.063 R)
- M48: 45,528,018 km (0.113 R)
- M49: 46,311,910 km (0.083 R)
- M50: 48,131,769 km (0.106 R)
- M51: 48,211,355 km (0.063 R)
- M52: 48,930,172 km (0.093 R)
- M53: 49,331,095 km (0.109 R)
- M54: 49,652,580 km (0.1 R)
- M55: 50,540,294 km (0.049 R)
- M56: 50,864,473 km (0.109 R)
- M57: 52,086,089 km (0.097 R)
- M58: 53,482,136 km (0.099 R)
- M59: 53,564,565 km (0.054 R)
- M60: 54,475,017 km (0.097 R)
- M61: 54,641,071 km (0.032 R)
- M62: 54,807,274 km (0.1 R)
- M63: 54,973,627 km (0.116 R)
Kuiper Belt
Range: 30 - 56 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 195 - 13,089 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.