Star System Generated (Seed: 1766731771)
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 (7 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 0.54 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 0.95
Radius: 0.98
Gravity: 0.99 G
Time & Orbit
Eccentricity (e): 0.223
Orbit Range: 0.42 AU - 0.66 AU
Year: 260 Days
Day: 18.2 Hours
Environment
Temp: -122 °C
Axial Tilt: 11.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (1)
Outer Limit: 57,528,201 km
- M1: 468,241 km (0.112 R)
Planet 2 - Gas Giant
Semi-Major Axis: 1.08 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 488.3
Radius: 8.7
Gravity: 6.45 G
Time & Orbit
Eccentricity (e): 0.176
Orbit Range: 0.89 AU - 1.27 AU
Year: 736 Days
Day: 11.7 Hours
Environment
Temp: -160 °C
Axial Tilt: 18 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (55)
Outer Limit: 57,528,201 km
- M1: 113,545 km (0.093 R)
- M2: 178,919 km (0.109 R)
- M3: 248,482 km (0.095 R)
- M4: 328,667 km (0.061 R)
- M5: 431,889 km (0.116 R)
- M6: 517,609 km (0.075 R)
- M7: 614,099 km (0.093 R)
- M8: 707,748 km (0.091 R)
- M9: 878,439 km (0.109 R)
- M10: 958,174 km (0.119 R)
- M11: 1,040,453 km (0.118 R)
- M12: 1,096,702 km (0.027 R)
- M13: 1,165,667 km (0.102 R)
- M14: 1,242,111 km (0.045 R)
- M15: 1,332,468 km (0.116 R)
- M16: 1,462,768 km (0.057 R)
- M17: 1,558,511 km (0.099 R)
- M18: 1,649,915 km (0.107 R)
- M19: 1,756,429 km (0.093 R)
- M20: 1,872,367 km (0.102 R)
- M21: 1,997,880 km (0.107 R)
- M22: 2,155,107 km (0.097 R)
- M23: 2,227,811 km (0.054 R)
- M24: 2,294,083 km (0.068 R)
- M25: 2,800,472 km (0.111 R)
- M26: 2,944,535 km (0.034 R)
- M27: 3,123,903 km (0.118 R)
- M28: 3,223,385 km (0.092 R)
- M29: 3,323,915 km (0.09 R)
- M30: 3,383,006 km (0.028 R)
- M31: 3,579,727 km (0.114 R)
- M32: 3,675,021 km (0.113 R)
- M33: 3,984,390 km (0.095 R)
- M34: 4,237,958 km (0.098 R)
- M35: 4,552,862 km (0.098 R)
- M36: 4,722,655 km (0.056 R)
- M37: 4,875,544 km (0.103 R)
- M38: 4,981,459 km (0.083 R)
- M39: 5,195,684 km (0.1 R)
- M40: 5,432,946 km (0.059 R)
- M41: 5,502,808 km (0.104 R)
- M42: 5,562,946 km (0.086 R)
- M43: 5,643,430 km (0.12 R)
- M44: 5,795,422 km (0.06 R)
- M45: 5,887,275 km (0.113 R)
- M46: 6,082,799 km (0.055 R)
- M47: 6,145,032 km (0.085 R)
- M48: 6,270,096 km (0.036 R)
- M49: 6,396,057 km (0.085 R)
- M50: 6,522,766 km (0.026 R)
- M51: 6,628,981 km (0.12 R)
- M52: 6,746,565 km (0.084 R)
- M53: 6,832,434 km (0.054 R)
- M54: 7,103,356 km (0.096 R)
- M55: 7,223,632 km (0.05 R)
Planet 3 - Gas Giant
Semi-Major Axis: 1.24 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 642.5
Radius: 11.7
Gravity: 4.69 G
Time & Orbit
Eccentricity (e): 0.108
Orbit Range: 1.11 AU - 1.37 AU
Year: 906 Days
Day: 9.3 Hours
Environment
Temp: -178 °C
Axial Tilt: 13.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (56)
Outer Limit: 57,528,201 km
- M1: 173,833 km (0.107 R)
- M2: 252,820 km (0.112 R)
- M3: 368,310 km (0.038 R)
- M4: 537,655 km (0.071 R)
- M5: 753,076 km (0.09 R)
- M6: 833,559 km (0.083 R)
- M7: 960,269 km (0.088 R)
- M8: 1,080,994 km (0.102 R)
- M9: 1,359,545 km (0.089 R)
- M10: 1,481,917 km (0.088 R)
- M11: 1,578,258 km (0.099 R)
- M12: 1,722,769 km (0.112 R)
- M13: 1,808,638 km (0.118 R)
- M14: 2,042,011 km (0.1 R)
- M15: 2,234,095 km (0.096 R)
- M16: 2,319,665 km (0.11 R)
- M17: 2,609,735 km (0.066 R)
- M18: 2,699,942 km (0.093 R)
- M19: 2,855,823 km (0.106 R)
- M20: 2,939,598 km (0.114 R)
- M21: 3,128,839 km (0.119 R)
- M22: 3,292,799 km (0.093 R)
- M23: 3,549,209 km (0.093 R)
- M24: 3,863,664 km (0.071 R)
- M25: 3,998,153 km (0.08 R)
- M26: 4,176,623 km (0.077 R)
- M27: 4,346,865 km (0.077 R)
- M28: 4,454,576 km (0.099 R)
- M29: 4,606,717 km (0.026 R)
- M30: 4,716,522 km (0.098 R)
- M31: 4,916,384 km (0.098 R)
- M32: 5,006,143 km (0.113 R)
- M33: 5,130,309 km (0.104 R)
- M34: 5,497,871 km (0.109 R)
- M35: 5,649,564 km (0.096 R)
- M36: 5,755,479 km (0.034 R)
- M37: 5,850,174 km (0.109 R)
- M38: 6,017,126 km (0.062 R)
- M39: 6,125,285 km (0.108 R)
- M40: 6,368,082 km (0.114 R)
- M41: 6,453,802 km (0.096 R)
- M42: 6,564,504 km (0.071 R)
- M43: 6,713,204 km (0.115 R)
- M44: 6,788,003 km (0.116 R)
- M45: 7,026,612 km (0.041 R)
- M46: 7,280,779 km (0.065 R)
- M47: 7,486,476 km (0.068 R)
- M48: 7,563,968 km (0.113 R)
- M49: 7,641,908 km (0.103 R)
- M50: 7,890,240 km (0.087 R)
- M51: 8,048,365 km (0.107 R)
- M52: 8,167,745 km (0.08 R)
- M53: 8,529,472 km (0.098 R)
- M54: 8,814,456 km (0.089 R)
- M55: 8,951,189 km (0.114 R)
- M56: 9,185,459 km (0.118 R)
Planet 4 - Gas Giant
Semi-Major Axis: 2.36 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 849.5
Radius: 10.9
Gravity: 7.15 G
Time & Orbit
Eccentricity (e): 0.173
Orbit Range: 1.95 AU - 2.77 AU
Year: 2378 Days
Day: 10.2 Hours
Environment
Temp: -195 °C
Axial Tilt: 38.5 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (66)
Outer Limit: 57,528,201 km
- M1: 155,133 km (0.058 R)
- M2: 237,561 km (0.117 R)
- M3: 354,996 km (0.088 R)
- M4: 438,621 km (0.118 R)
- M5: 648,058 km (0.118 R)
- M6: 728,691 km (0.111 R)
- M7: 832,363 km (0.032 R)
- M8: 921,224 km (0.066 R)
- M9: 1,066,483 km (0.037 R)
- M10: 1,175,091 km (0.113 R)
- M11: 1,392,008 km (0.106 R)
- M12: 1,511,686 km (0.047 R)
- M13: 1,723,218 km (0.118 R)
- M14: 1,904,830 km (0.072 R)
- M15: 2,092,874 km (0.098 R)
- M16: 2,429,469 km (0.118 R)
- M17: 2,531,046 km (0.088 R)
- M18: 2,813,786 km (0.056 R)
- M19: 2,951,416 km (0.076 R)
- M20: 3,106,998 km (0.088 R)
- M21: 3,297,287 km (0.07 R)
- M22: 3,393,927 km (0.112 R)
- M23: 3,507,920 km (0.048 R)
- M24: 3,722,893 km (0.051 R)
- M25: 3,891,340 km (0.094 R)
- M26: 3,993,515 km (0.105 R)
- M27: 4,218,211 km (0.034 R)
- M28: 4,518,454 km (0.094 R)
- M29: 5,027,984 km (0.034 R)
- M30: 5,176,984 km (0.071 R)
- M31: 5,308,630 km (0.088 R)
- M32: 5,594,362 km (0.103 R)
- M33: 5,807,240 km (0.097 R)
- M34: 6,003,063 km (0.108 R)
- M35: 6,121,545 km (0.113 R)
- M36: 7,035,289 km (0.09 R)
- M37: 7,391,631 km (0.097 R)
- M38: 8,451,382 km (0.028 R)
- M39: 9,443,216 km (0.1 R)
- M40: 9,743,309 km (0.104 R)
- M41: 9,836,359 km (0.084 R)
- M42: 10,093,518 km (0.056 R)
- M43: 10,353,070 km (0.118 R)
- M44: 10,471,701 km (0.098 R)
- M45: 10,662,588 km (0.11 R)
- M46: 11,732,512 km (0.098 R)
- M47: 12,532,262 km (0.065 R)
- M48: 12,633,391 km (0.086 R)
- M49: 12,913,139 km (0.117 R)
- M50: 13,143,519 km (0.069 R)
- M51: 13,452,738 km (0.113 R)
- M52: 13,634,350 km (0.105 R)
- M53: 14,104,835 km (0.114 R)
- M54: 14,395,055 km (0.086 R)
- M55: 14,820,661 km (0.047 R)
- M56: 15,439,847 km (0.119 R)
- M57: 15,575,532 km (0.104 R)
- M58: 16,122,462 km (0.096 R)
- M59: 16,898,575 km (0.092 R)
- M60: 17,094,549 km (0.112 R)
- M61: 17,375,793 km (0.1 R)
- M62: 17,545,287 km (0.064 R)
- M63: 17,942,769 km (0.091 R)
- M64: 18,429,560 km (0.102 R)
- M65: 19,153,464 km (0.117 R)
- M66: 19,621,556 km (0.118 R)
Planet 5 - Gas Giant
Semi-Major Axis: 3 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 243.1
Radius: 10.6
Gravity: 2.16 G
Time & Orbit
Eccentricity (e): 0.195
Orbit Range: 2.42 AU - 3.59 AU
Year: 3409 Days
Day: 5.9 Hours
Environment
Temp: -195 °C
Axial Tilt: 8.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (67)
Outer Limit: 57,528,201 km
- M1: 134,488 km (0.104 R)
- M2: 208,839 km (0.12 R)
- M3: 391,647 km (0.114 R)
- M4: 682,765 km (0.065 R)
- M5: 866,620 km (0.092 R)
- M6: 964,906 km (0.117 R)
- M7: 1,086,230 km (0.079 R)
- M8: 1,153,848 km (0.07 R)
- M9: 1,232,836 km (0.062 R)
- M10: 1,590,225 km (0.116 R)
- M11: 1,679,087 km (0.118 R)
- M12: 1,838,558 km (0.075 R)
- M13: 1,967,661 km (0.094 R)
- M14: 2,210,009 km (0.106 R)
- M15: 2,360,206 km (0.106 R)
- M16: 2,631,277 km (0.108 R)
- M17: 2,831,289 km (0.061 R)
- M18: 2,939,897 km (0.064 R)
- M19: 3,022,326 km (0.109 R)
- M20: 3,175,664 km (0.079 R)
- M21: 3,331,395 km (0.052 R)
- M22: 3,577,334 km (0.104 R)
- M23: 3,695,067 km (0.09 R)
- M24: 4,413,137 km (0.098 R)
- M25: 4,555,554 km (0.091 R)
- M26: 4,731,781 km (0.072 R)
- M27: 5,008,537 km (0.098 R)
- M28: 5,408,412 km (0.096 R)
- M29: 5,612,164 km (0.104 R)
- M30: 5,766,699 km (0.069 R)
- M31: 5,922,580 km (0.106 R)
- M32: 6,434,653 km (0.119 R)
- M33: 6,578,566 km (0.105 R)
- M34: 6,705,126 km (0.099 R)
- M35: 6,814,482 km (0.073 R)
- M36: 7,108,741 km (0.114 R)
- M37: 7,538,985 km (0.105 R)
- M38: 7,709,676 km (0.089 R)
- M39: 8,093,694 km (0.112 R)
- M40: 8,385,858 km (0.112 R)
- M41: 8,464,248 km (0.119 R)
- M42: 9,222,110 km (0.117 R)
- M43: 9,609,270 km (0.082 R)
- M44: 9,794,472 km (0.105 R)
- M45: 9,939,283 km (0.081 R)
- M46: 10,210,204 km (0.077 R)
- M47: 10,802,163 km (0.108 R)
- M48: 11,037,780 km (0.041 R)
- M49: 11,231,808 km (0.082 R)
- M50: 11,492,408 km (0.077 R)
- M51: 11,645,297 km (0.1 R)
- M52: 11,908,888 km (0.084 R)
- M53: 12,063,572 km (0.1 R)
- M54: 12,308,015 km (0.114 R)
- M55: 12,734,220 km (0.056 R)
- M56: 13,005,889 km (0.098 R)
- M57: 13,074,106 km (0.045 R)
- M58: 13,371,058 km (0.056 R)
- M59: 13,878,793 km (0.069 R)
- M60: 14,111,717 km (0.112 R)
- M61: 14,298,864 km (0.087 R)
- M62: 14,557,668 km (0.054 R)
- M63: 14,794,332 km (0.106 R)
- M64: 14,984,471 km (0.119 R)
- M65: 15,777,788 km (0.057 R)
- M66: 16,142,807 km (0.11 R)
- M67: 16,240,644 km (0.098 R)
Planet 6 - Ice Giant
Semi-Major Axis: 7.15 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 210.7
Radius: 3.5
Gravity: 17.2 G
Time & Orbit
Eccentricity (e): 0.089
Orbit Range: 6.51 AU - 7.79 AU
Year: 12542 Days
Day: 15.1 Hours
Environment
Temp: -218 °C
Axial Tilt: 25.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (72)
Outer Limit: 57,528,201 km
- M1: 44,730 km (0.118 R)
- M2: 157,975 km (0.077 R)
- M3: 279,150 km (0.093 R)
- M4: 344,225 km (0.114 R)
- M5: 739,612 km (0.099 R)
- M6: 878,140 km (0.081 R)
- M7: 1,058,405 km (0.113 R)
- M8: 1,126,771 km (0.071 R)
- M9: 1,196,633 km (0.082 R)
- M10: 2,076,119 km (0.062 R)
- M11: 2,183,531 km (0.106 R)
- M12: 2,771,600 km (0.058 R)
- M13: 3,583,467 km (0.119 R)
- M14: 4,325,473 km (0.103 R)
- M15: 4,407,752 km (0.112 R)
- M16: 4,798,352 km (0.103 R)
- M17: 4,826,626 km (0.12 R)
- M18: 4,855,049 km (0.094 R)
- M19: 5,171,000 km (0.103 R)
- M20: 5,287,537 km (0.096 R)
- M21: 5,434,442 km (0.076 R)
- M22: 5,582,693 km (0.099 R)
- M23: 6,250,498 km (0.037 R)
- M24: 7,071,940 km (0.055 R)
- M25: 7,594,037 km (0.099 R)
- M26: 8,060,932 km (0.112 R)
- M27: 8,400,220 km (0.083 R)
- M28: 8,468,586 km (0.089 R)
- M29: 8,674,881 km (0.099 R)
- M30: 8,709,438 km (0.094 R)
- M31: 9,374,551 km (0.112 R)
- M32: 9,445,460 km (0.064 R)
- M33: 9,911,158 km (0.095 R)
- M34: 10,019,617 km (0.08 R)
- M35: 10,384,037 km (0.106 R)
- M36: 10,939,045 km (0.082 R)
- M37: 11,579,474 km (0.095 R)
- M38: 13,532,324 km (0.101 R)
- M39: 14,097,056 km (0.09 R)
- M40: 14,751,846 km (0.106 R)
- M41: 15,041,468 km (0.116 R)
- M42: 15,500,434 km (0.112 R)
- M43: 15,668,432 km (0.073 R)
- M44: 16,261,139 km (0.063 R)
- M45: 16,389,195 km (0.091 R)
- M46: 16,560,335 km (0.105 R)
- M47: 18,883,440 km (0.091 R)
- M48: 19,242,774 km (0.059 R)
- M49: 19,378,160 km (0.106 R)
- M50: 19,877,219 km (0.116 R)
- M51: 20,426,542 km (0.094 R)
- M52: 23,728,167 km (0.106 R)
- M53: 23,776,487 km (0.094 R)
- M54: 25,687,600 km (0.075 R)
- M55: 26,035,864 km (0.105 R)
- M56: 28,311,397 km (0.04 R)
- M57: 28,414,021 km (0.108 R)
- M58: 28,877,176 km (0.115 R)
- M59: 29,915,535 km (0.116 R)
- M60: 31,549,144 km (0.074 R)
- M61: 33,103,166 km (0.116 R)
- M62: 33,265,331 km (0.039 R)
- M63: 33,373,639 km (0.11 R)
- M64: 34,080,340 km (0.047 R)
- M65: 34,408,109 km (0.119 R)
- M66: 34,462,861 km (0.098 R)
- M67: 34,956,684 km (0.079 R)
- M68: 35,232,094 km (0.1 R)
- M69: 35,397,699 km (0.081 R)
- M70: 35,674,305 km (0.082 R)
- M71: 35,840,658 km (0.064 R)
- M72: 36,452,513 km (0.085 R)
Planet 7 - Ice Giant
Semi-Major Axis: 7.42 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 673.6
Radius: 4.8
Gravity: 29.24 G
Time & Orbit
Eccentricity (e): 0.222
Orbit Range: 5.77 AU - 9.07 AU
Year: 13259 Days
Day: 20.9 Hours
Environment
Temp: -219 °C
Axial Tilt: 32.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (98)
Outer Limit: 57,528,201 km
- M1: 144,811 km (0.062 R)
- M2: 198,516 km (0.108 R)
- M3: 247,285 km (0.106 R)
- M4: 373,396 km (0.109 R)
- M5: 404,213 km (0.108 R)
- M6: 741,108 km (0.105 R)
- M7: 883,226 km (0.097 R)
- M8: 1,240,017 km (0.114 R)
- M9: 1,663,379 km (0.051 R)
- M10: 1,822,700 km (0.092 R)
- M11: 2,014,934 km (0.092 R)
- M12: 2,418,848 km (0.118 R)
- M13: 2,722,382 km (0.105 R)
- M14: 2,815,731 km (0.098 R)
- M15: 2,941,992 km (0.11 R)
- M16: 3,772,260 km (0.097 R)
- M17: 4,744,197 km (0.111 R)
- M18: 5,238,469 km (0.116 R)
- M19: 5,354,856 km (0.102 R)
- M20: 5,393,751 km (0.098 R)
- M21: 5,471,991 km (0.109 R)
- M22: 5,590,173 km (0.05 R)
- M23: 6,111,522 km (0.08 R)
- M24: 6,193,202 km (0.077 R)
- M25: 6,316,172 km (0.047 R)
- M26: 7,157,211 km (0.051 R)
- M27: 7,416,314 km (0.099 R)
- M28: 7,810,804 km (0.098 R)
- M29: 8,032,957 km (0.119 R)
- M30: 8,167,146 km (0.08 R)
- M31: 8,347,262 km (0.119 R)
- M32: 9,835,162 km (0.063 R)
- M33: 10,855,121 km (0.078 R)
- M34: 11,302,568 km (0.1 R)
- M35: 12,266,577 km (0.081 R)
- M36: 13,681,324 km (0.046 R)
- M37: 14,871,674 km (0.114 R)
- M38: 15,257,337 km (0.04 R)
- M39: 15,479,191 km (0.094 R)
- M40: 15,869,941 km (0.033 R)
- M41: 16,320,679 km (0.1 R)
- M42: 16,889,899 km (0.054 R)
- M43: 17,465,551 km (0.117 R)
- M44: 18,458,881 km (0.03 R)
- M45: 18,932,658 km (0.108 R)
- M46: 19,051,738 km (0.098 R)
- M47: 19,590,589 km (0.105 R)
- M48: 19,711,015 km (0.115 R)
- M49: 22,108,321 km (0.038 R)
- M50: 22,737,680 km (0.117 R)
- M51: 22,864,239 km (0.117 R)
- M52: 23,500,629 km (0.058 R)
- M53: 24,921,060 km (0.056 R)
- M54: 25,116,884 km (0.077 R)
- M55: 25,444,354 km (0.056 R)
- M56: 27,439,092 km (0.077 R)
- M57: 28,796,693 km (0.093 R)
- M58: 28,865,059 km (0.056 R)
- M59: 29,070,756 km (0.114 R)
- M60: 29,483,496 km (0.091 R)
- M61: 29,759,804 km (0.096 R)
- M62: 30,245,398 km (0.052 R)
- M63: 31,364,989 km (0.1 R)
- M64: 32,000,780 km (0.073 R)
- M65: 32,498,193 km (0.113 R)
- M66: 32,712,118 km (0.089 R)
- M67: 34,585,981 km (0.101 R)
- M68: 35,977,241 km (0.118 R)
- M69: 36,494,401 km (0.09 R)
- M70: 36,568,452 km (0.059 R)
- M71: 37,760,447 km (0.066 R)
- M72: 39,041,005 km (0.065 R)
- M73: 39,724,667 km (0.105 R)
- M74: 42,264,989 km (0.092 R)
- M75: 42,810,572 km (0.083 R)
- M76: 44,066,297 km (0.073 R)
- M77: 44,540,372 km (0.025 R)
- M78: 45,573,196 km (0.049 R)
- M79: 45,732,817 km (0.097 R)
- M80: 46,935,734 km (0.105 R)
- M81: 47,339,049 km (0.106 R)
- M82: 48,230,354 km (0.103 R)
- M83: 48,963,682 km (0.113 R)
- M84: 49,045,363 km (0.11 R)
- M85: 49,536,642 km (0.115 R)
- M86: 50,441,410 km (0.09 R)
- M87: 51,185,809 km (0.099 R)
- M88: 51,600,943 km (0.039 R)
- M89: 52,685,378 km (0.034 R)
- M90: 52,852,778 km (0.04 R)
- M91: 53,020,477 km (0.12 R)
- M92: 53,693,069 km (0.116 R)
- M93: 55,046,481 km (0.11 R)
- M94: 55,386,667 km (0.109 R)
- M95: 55,556,909 km (0.118 R)
- M96: 55,812,722 km (0.063 R)
- M97: 55,983,562 km (0.04 R)
- M98: 56,154,553 km (0.084 R)
Kuiper Belt
Range: 30 - 51 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 513 - 16,742 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.