Star System Generated (Seed: 1766152197)
Star Details
Spectral Class: K2V
Temperature: 4,771 K
Mass: 0.73 sol
Luminosity: 0.33 lux
Habitable Zone (HZ)
Inner Boundary: 0.55 AU
Outer Boundary: 0.79 AU
Physical Limits
Snow Line: 2.76 AU
Max System Radius: 17.1 AU
Planetary System (7 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 0.57 AU
Status: HZ
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.39
Radius: 1.81
Gravity: 1.34 G
Time & Orbit
Eccentricity (e): 0.016
Orbit Range: 0.56 AU - 0.58 AU
Year: 184 Days
Day: 33.3 Hours
Environment
Temp: 20 °C
Axial Tilt: 33.7 °
Atmosphere: Nâ‚‚, Oâ‚‚
Biome: Arid/Tundra
Planet 2 - Terrestrial
Semi-Major Axis: 2.6 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 0.33
Radius: 0.64
Gravity: 0.81 G
Time & Orbit
Eccentricity (e): 0.217
Orbit Range: 2.04 AU - 3.16 AU
Year: 1792 Days
Day: 16.8 Hours
Environment
Temp: -139 °C
Axial Tilt: 28.7 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 3 - Gas Giant
Semi-Major Axis: 3.59 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 621.2
Radius: 11
Gravity: 5.13 G
Time & Orbit
Eccentricity (e): 0.108
Orbit Range: 3.2 AU - 3.98 AU
Year: 2908 Days
Day: 14.3 Hours
Environment
Temp: -142 °C
Axial Tilt: 39 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (78)
Outer Limit: 41,361,278 km
- M1: 151,243 km (0.066 R)
- M2: 274,961 km (0.095 R)
- M3: 503,397 km (0.108 R)
- M4: 738,415 km (0.081 R)
- M5: 1,242,111 km (0.061 R)
- M6: 1,323,642 km (0.047 R)
- M7: 1,529,638 km (0.089 R)
- M8: 1,720,226 km (0.072 R)
- M9: 1,811,929 km (0.071 R)
- M10: 2,111,275 km (0.092 R)
- M11: 2,238,283 km (0.077 R)
- M12: 2,710,863 km (0.05 R)
- M13: 2,802,866 km (0.118 R)
- M14: 2,958,896 km (0.039 R)
- M15: 3,069,748 km (0.072 R)
- M16: 3,149,783 km (0.09 R)
- M17: 3,344,859 km (0.107 R)
- M18: 3,427,287 km (0.099 R)
- M19: 3,661,857 km (0.072 R)
- M20: 3,764,032 km (0.068 R)
- M21: 4,076,243 km (0.118 R)
- M22: 4,164,506 km (0.029 R)
- M23: 4,235,714 km (0.101 R)
- M24: 4,415,082 km (0.042 R)
- M25: 4,800,296 km (0.07 R)
- M26: 5,139,136 km (0.114 R)
- M27: 5,215,580 km (0.055 R)
- M28: 5,447,008 km (0.099 R)
- M29: 5,780,611 km (0.108 R)
- M30: 5,920,037 km (0.036 R)
- M31: 6,020,267 km (0.106 R)
- M32: 6,385,735 km (0.086 R)
- M33: 6,758,533 km (0.034 R)
- M34: 6,884,494 km (0.089 R)
- M35: 7,417,212 km (0.081 R)
- M36: 7,525,371 km (0.091 R)
- M37: 7,612,437 km (0.056 R)
- M38: 8,252,567 km (0.104 R)
- M39: 9,373,503 km (0.101 R)
- M40: 9,726,106 km (0.101 R)
- M41: 9,939,881 km (0.115 R)
- M42: 10,371,920 km (0.04 R)
- M43: 10,493,094 km (0.059 R)
- M44: 10,614,717 km (0.12 R)
- M45: 10,810,241 km (0.111 R)
- M46: 11,180,047 km (0.034 R)
- M47: 11,730,119 km (0.108 R)
- M48: 12,084,666 km (0.037 R)
- M49: 12,289,016 km (0.11 R)
- M50: 12,571,607 km (0.109 R)
- M51: 12,882,471 km (0.068 R)
- M52: 13,353,555 km (0.118 R)
- M53: 13,432,692 km (0.116 R)
- M54: 13,538,308 km (0.091 R)
- M55: 13,830,323 km (0.114 R)
- M56: 14,420,636 km (0.118 R)
- M57: 14,827,842 km (0.094 R)
- M58: 15,073,930 km (0.079 R)
- M59: 15,321,365 km (0.101 R)
- M60: 15,597,972 km (0.088 R)
- M61: 15,736,948 km (0.105 R)
- M62: 15,848,398 km (0.032 R)
- M63: 16,437,664 km (0.096 R)
- M64: 16,862,971 km (0.089 R)
- M65: 17,205,850 km (0.097 R)
- M66: 17,378,186 km (0.082 R)
- M67: 17,724,505 km (0.078 R)
- M68: 17,811,571 km (0.111 R)
- M69: 17,985,853 km (0.075 R)
- M70: 18,131,561 km (0.105 R)
- M71: 19,073,429 km (0.094 R)
- M72: 19,221,980 km (0.111 R)
- M73: 19,400,749 km (0.106 R)
- M74: 19,490,359 km (0.05 R)
- M75: 19,610,186 km (0.12 R)
- M76: 20,031,005 km (0.103 R)
- M77: 20,151,880 km (0.093 R)
- M78: 20,363,861 km (0.115 R)
Planet 4 - Gas Giant
Semi-Major Axis: 4 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 495
Radius: 10.5
Gravity: 4.49 G
Time & Orbit
Eccentricity (e): 0.075
Orbit Range: 3.7 AU - 4.3 AU
Year: 3420 Days
Day: 9.6 Hours
Environment
Temp: -154 °C
Axial Tilt: 39.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (72)
Outer Limit: 41,361,278 km
- M1: 135,835 km (0.102 R)
- M2: 233,821 km (0.11 R)
- M3: 371,302 km (0.097 R)
- M4: 559,945 km (0.101 R)
- M5: 771,925 km (0.103 R)
- M6: 1,043,445 km (0.092 R)
- M7: 1,249,142 km (0.109 R)
- M8: 1,381,686 km (0.093 R)
- M9: 1,493,585 km (0.047 R)
- M10: 1,848,282 km (0.046 R)
- M11: 2,099,457 km (0.079 R)
- M12: 2,185,625 km (0.071 R)
- M13: 2,272,990 km (0.092 R)
- M14: 2,466,570 km (0.074 R)
- M15: 3,047,159 km (0.117 R)
- M16: 3,261,084 km (0.056 R)
- M17: 3,378,369 km (0.104 R)
- M18: 3,548,461 km (0.083 R)
- M19: 3,950,281 km (0.067 R)
- M20: 4,111,548 km (0.093 R)
- M21: 4,238,556 km (0.09 R)
- M22: 4,385,162 km (0.096 R)
- M23: 4,835,452 km (0.114 R)
- M24: 4,950,343 km (0.102 R)
- M25: 5,538,562 km (0.104 R)
- M26: 5,984,064 km (0.048 R)
- M27: 6,211,154 km (0.098 R)
- M28: 6,441,086 km (0.065 R)
- M29: 6,974,253 km (0.119 R)
- M30: 7,082,562 km (0.108 R)
- M31: 7,433,069 km (0.065 R)
- M32: 7,499,341 km (0.107 R)
- M33: 8,242,394 km (0.119 R)
- M34: 8,472,176 km (0.117 R)
- M35: 8,891,050 km (0.094 R)
- M36: 9,580,248 km (0.114 R)
- M37: 9,676,738 km (0.091 R)
- M38: 9,943,621 km (0.065 R)
- M39: 10,188,363 km (0.07 R)
- M40: 10,311,332 km (0.1 R)
- M41: 10,658,699 km (0.052 R)
- M42: 10,934,408 km (0.112 R)
- M43: 11,263,074 km (0.091 R)
- M44: 11,982,341 km (0.113 R)
- M45: 12,295,150 km (0.075 R)
- M46: 12,505,185 km (0.108 R)
- M47: 12,663,460 km (0.118 R)
- M48: 13,276,512 km (0.107 R)
- M49: 13,465,005 km (0.106 R)
- M50: 13,763,004 km (0.063 R)
- M51: 14,063,247 km (0.084 R)
- M52: 14,227,954 km (0.061 R)
- M53: 14,531,488 km (0.074 R)
- M54: 15,032,791 km (0.083 R)
- M55: 15,454,956 km (0.113 R)
- M56: 15,738,594 km (0.119 R)
- M57: 15,852,438 km (0.116 R)
- M58: 16,224,637 km (0.049 R)
- M59: 16,310,955 km (0.11 R)
- M60: 16,397,423 km (0.069 R)
- M61: 16,599,679 km (0.044 R)
- M62: 17,065,228 km (0.103 R)
- M63: 17,270,326 km (0.055 R)
- M64: 17,801,249 km (0.09 R)
- M65: 17,979,420 km (0.109 R)
- M66: 18,158,190 km (0.093 R)
- M67: 18,307,638 km (0.054 R)
- M68: 18,457,535 km (0.106 R)
- M69: 19,061,013 km (0.115 R)
- M70: 19,395,663 km (0.037 R)
- M71: 20,318,383 km (0.095 R)
- M72: 20,504,632 km (0.102 R)
Planet 5 - Gas Giant
Semi-Major Axis: 8.71 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 619.9
Radius: 9.9
Gravity: 6.32 G
Time & Orbit
Eccentricity (e): 0.224
Orbit Range: 6.76 AU - 10.66 AU
Year: 10989 Days
Day: 11.5 Hours
Environment
Temp: -198 °C
Axial Tilt: 43.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (88)
Outer Limit: 41,361,278 km
- M1: 341,682 km (0.102 R)
- M2: 404,961 km (0.052 R)
- M3: 473,627 km (0.064 R)
- M4: 673,789 km (0.089 R)
- M5: 793,318 km (0.081 R)
- M6: 1,114,504 km (0.073 R)
- M7: 1,237,474 km (0.089 R)
- M8: 1,452,895 km (0.106 R)
- M9: 2,068,789 km (0.063 R)
- M10: 2,144,785 km (0.103 R)
- M11: 2,221,678 km (0.079 R)
- M12: 2,458,192 km (0.047 R)
- M13: 3,157,562 km (0.046 R)
- M14: 3,636,275 km (0.099 R)
- M15: 3,728,577 km (0.081 R)
- M16: 4,594,300 km (0.12 R)
- M17: 5,135,994 km (0.082 R)
- M18: 5,379,240 km (0.1 R)
- M19: 5,769,391 km (0.074 R)
- M20: 6,427,622 km (0.064 R)
- M21: 6,539,521 km (0.118 R)
- M22: 6,614,619 km (0.106 R)
- M23: 7,302,919 km (0.063 R)
- M24: 7,537,489 km (0.093 R)
- M25: 7,974,015 km (0.039 R)
- M26: 8,175,075 km (0.105 R)
- M27: 8,705,848 km (0.05 R)
- M28: 9,800,755 km (0.093 R)
- M29: 9,930,007 km (0.114 R)
- M30: 10,016,325 km (0.079 R)
- M31: 10,189,859 km (0.106 R)
- M32: 10,320,757 km (0.068 R)
- M33: 10,672,312 km (0.054 R)
- M34: 11,297,182 km (0.094 R)
- M35: 11,523,225 km (0.105 R)
- M36: 11,979,797 km (0.108 R)
- M37: 12,863,622 km (0.031 R)
- M38: 13,576,156 km (0.117 R)
- M39: 13,816,560 km (0.091 R)
- M40: 14,058,310 km (0.085 R)
- M41: 14,301,556 km (0.114 R)
- M42: 14,792,088 km (0.045 R)
- M43: 15,188,522 km (0.082 R)
- M44: 15,840,171 km (0.04 R)
- M45: 17,535,264 km (0.113 R)
- M46: 17,639,833 km (0.119 R)
- M47: 17,744,551 km (0.039 R)
- M48: 18,060,203 km (0.104 R)
- M49: 18,590,378 km (0.094 R)
- M50: 19,341,210 km (0.101 R)
- M51: 20,375,828 km (0.112 R)
- M52: 20,540,984 km (0.111 R)
- M53: 22,102,487 km (0.069 R)
- M54: 23,701,987 km (0.117 R)
- M55: 24,107,697 km (0.104 R)
- M56: 24,925,997 km (0.084 R)
- M57: 25,338,588 km (0.117 R)
- M58: 25,812,813 km (0.119 R)
- M59: 26,950,954 km (0.069 R)
- M60: 27,253,142 km (0.061 R)
- M61: 28,105,401 km (0.052 R)
- M62: 28,781,134 km (0.074 R)
- M63: 29,090,054 km (0.087 R)
- M64: 29,400,021 km (0.076 R)
- M65: 29,711,184 km (0.054 R)
- M66: 30,023,395 km (0.098 R)
- M67: 30,273,971 km (0.047 R)
- M68: 30,525,296 km (0.11 R)
- M69: 32,047,305 km (0.078 R)
- M70: 32,431,622 km (0.108 R)
- M71: 33,788,923 km (0.099 R)
- M72: 35,428,815 km (0.087 R)
- M73: 36,358,566 km (0.081 R)
- M74: 36,960,398 km (0.056 R)
- M75: 38,174,085 km (0.119 R)
- M76: 39,469,154 km (0.09 R)
- M77: 40,778,734 km (0.116 R)
- M78: 41,125,801 km (0.119 R)
- M79: 41,195,214 km (0.111 R)
- M80: 43,865,686 km (0.081 R)
- M81: 44,079,013 km (0.07 R)
- M82: 44,506,414 km (0.085 R)
- M83: 45,652,932 km (0.114 R)
- M84: 46,591,658 km (0.072 R)
- M85: 47,390,960 km (0.098 R)
- M86: 47,536,818 km (0.091 R)
- M87: 48,194,749 km (0.054 R)
- M88: 49,150,530 km (0.053 R)
Planet 6 - Gas Giant
Semi-Major Axis: 9.41 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 407.7
Radius: 11
Gravity: 3.37 G
Time & Orbit
Eccentricity (e): 0.245
Orbit Range: 7.1 AU - 11.72 AU
Year: 12340 Days
Day: 8.9 Hours
Environment
Temp: -192 °C
Axial Tilt: 29.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (85)
Outer Limit: 41,361,278 km
- M1: 140,921 km (0.092 R)
- M2: 221,704 km (0.101 R)
- M3: 308,770 km (0.116 R)
- M4: 506,838 km (0.037 R)
- M5: 638,484 km (0.096 R)
- M6: 799,601 km (0.09 R)
- M7: 956,978 km (0.094 R)
- M8: 1,124,976 km (0.115 R)
- M9: 1,621,342 km (0.083 R)
- M10: 1,870,422 km (0.094 R)
- M11: 1,987,707 km (0.079 R)
- M12: 2,254,739 km (0.045 R)
- M13: 2,354,820 km (0.087 R)
- M14: 2,986,422 km (0.108 R)
- M15: 3,069,150 km (0.064 R)
- M16: 4,747,488 km (0.092 R)
- M17: 5,238,319 km (0.057 R)
- M18: 6,661,593 km (0.119 R)
- M19: 7,173,667 km (0.112 R)
- M20: 7,698,456 km (0.077 R)
- M21: 8,119,574 km (0.086 R)
- M22: 8,274,557 km (0.087 R)
- M23: 8,352,348 km (0.11 R)
- M24: 8,705,848 km (0.049 R)
- M25: 9,549,730 km (0.069 R)
- M26: 9,754,529 km (0.116 R)
- M27: 10,251,942 km (0.069 R)
- M28: 10,377,604 km (0.117 R)
- M29: 10,927,975 km (0.065 R)
- M30: 11,142,199 km (0.117 R)
- M31: 11,444,536 km (0.074 R)
- M32: 12,323,125 km (0.067 R)
- M33: 13,314,510 km (0.108 R)
- M34: 13,543,394 km (0.117 R)
- M35: 14,519,072 km (0.1 R)
- M36: 15,517,338 km (0.11 R)
- M37: 16,635,882 km (0.105 R)
- M38: 16,981,602 km (0.036 R)
- M39: 17,479,464 km (0.041 R)
- M40: 17,881,134 km (0.058 R)
- M41: 18,235,232 km (0.119 R)
- M42: 18,693,750 km (0.042 R)
- M43: 20,144,849 km (0.045 R)
- M44: 20,618,925 km (0.119 R)
- M45: 20,883,863 km (0.117 R)
- M46: 21,149,997 km (0.117 R)
- M47: 21,256,661 km (0.119 R)
- M48: 22,660,786 km (0.033 R)
- M49: 22,824,746 km (0.101 R)
- M50: 23,983,381 km (0.088 R)
- M51: 24,317,882 km (0.03 R)
- M52: 24,879,023 km (0.114 R)
- M53: 25,048,069 km (0.053 R)
- M54: 27,397,803 km (0.103 R)
- M55: 28,040,176 km (0.09 R)
- M56: 28,746,577 km (0.11 R)
- M57: 29,280,193 km (0.098 R)
- M58: 29,637,881 km (0.075 R)
- M59: 29,757,260 km (0.107 R)
- M60: 30,116,894 km (0.091 R)
- M61: 31,143,285 km (0.109 R)
- M62: 32,058,524 km (0.093 R)
- M63: 32,797,089 km (0.106 R)
- M64: 33,044,524 km (0.105 R)
- M65: 33,292,557 km (0.086 R)
- M66: 33,541,189 km (0.114 R)
- M67: 33,790,419 km (0.11 R)
- M68: 34,165,611 km (0.078 R)
- M69: 34,541,999 km (0.093 R)
- M70: 36,829,649 km (0.054 R)
- M71: 37,538,294 km (0.113 R)
- M72: 38,186,502 km (0.064 R)
- M73: 38,446,802 km (0.096 R)
- M74: 39,296,967 km (0.093 R)
- M75: 40,882,555 km (0.047 R)
- M76: 41,349,001 km (0.102 R)
- M77: 41,951,282 km (0.091 R)
- M78: 43,232,289 km (0.098 R)
- M79: 44,048,046 km (0.04 R)
- M80: 44,526,161 km (0.08 R)
- M81: 44,731,559 km (0.081 R)
- M82: 44,800,224 km (0.067 R)
- M83: 45,487,626 km (0.035 R)
- M84: 45,832,748 km (0.099 R)
- M85: 45,901,863 km (0.099 R)
Planet 7 - Ice Giant
Semi-Major Axis: 11.72 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 149.6
Radius: 5.3
Gravity: 5.33 G
Time & Orbit
Eccentricity (e): 0.211
Orbit Range: 9.25 AU - 14.19 AU
Year: 17152 Days
Day: 21 Hours
Environment
Temp: -196 °C
Axial Tilt: 16 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (93)
Outer Limit: 41,361,278 km
- M1: 85,121 km (0.059 R)
- M2: 191,635 km (0.117 R)
- M3: 249,080 km (0.055 R)
- M4: 313,408 km (0.067 R)
- M5: 486,642 km (0.108 R)
- M6: 613,202 km (0.104 R)
- M7: 657,782 km (0.117 R)
- M8: 914,043 km (0.111 R)
- M9: 1,017,864 km (0.086 R)
- M10: 1,071,270 km (0.12 R)
- M11: 1,470,996 km (0.118 R)
- M12: 1,697,487 km (0.106 R)
- M13: 1,739,823 km (0.065 R)
- M14: 2,440,988 km (0.106 R)
- M15: 2,684,085 km (0.104 R)
- M16: 3,351,890 km (0.09 R)
- M17: 3,621,914 km (0.093 R)
- M18: 3,759,544 km (0.076 R)
- M19: 3,870,845 km (0.112 R)
- M20: 4,039,890 km (0.048 R)
- M21: 4,327,118 km (0.102 R)
- M22: 4,620,929 km (0.09 R)
- M23: 4,951,540 km (0.082 R)
- M24: 5,321,047 km (0.069 R)
- M25: 5,923,926 km (0.102 R)
- M26: 5,988,702 km (0.107 R)
- M27: 6,919,350 km (0.079 R)
- M28: 6,987,567 km (0.063 R)
- M29: 7,262,677 km (0.083 R)
- M30: 7,366,648 km (0.108 R)
- M31: 7,401,504 km (0.116 R)
- M32: 8,288,919 km (0.113 R)
- M33: 8,837,494 km (0.1 R)
- M34: 8,911,545 km (0.078 R)
- M35: 9,134,745 km (0.041 R)
- M36: 9,172,145 km (0.099 R)
- M37: 9,624,977 km (0.083 R)
- M38: 10,473,796 km (0.087 R)
- M39: 10,907,031 km (0.041 R)
- M40: 11,105,996 km (0.114 R)
- M41: 12,159,614 km (0.119 R)
- M42: 12,200,754 km (0.09 R)
- M43: 12,823,679 km (0.044 R)
- M44: 12,865,566 km (0.027 R)
- M45: 13,244,797 km (0.094 R)
- M46: 13,371,955 km (0.036 R)
- M47: 13,841,842 km (0.071 R)
- M48: 14,057,114 km (0.117 R)
- M49: 14,143,581 km (0.102 R)
- M50: 14,316,965 km (0.077 R)
- M51: 14,534,780 km (0.044 R)
- M52: 15,372,378 km (0.091 R)
- M53: 15,595,428 km (0.101 R)
- M54: 16,089,849 km (0.068 R)
- M55: 16,270,863 km (0.061 R)
- M56: 17,743,504 km (0.118 R)
- M57: 18,071,273 km (0.096 R)
- M58: 18,306,740 km (0.109 R)
- M59: 19,450,566 km (0.105 R)
- M60: 20,470,225 km (0.09 R)
- M61: 21,357,938 km (0.085 R)
- M62: 22,865,287 km (0.068 R)
- M63: 23,068,889 km (0.101 R)
- M64: 24,251,012 km (0.113 R)
- M65: 24,302,922 km (0.026 R)
- M66: 25,032,511 km (0.055 R)
- M67: 25,189,888 km (0.052 R)
- M68: 25,242,397 km (0.109 R)
- M69: 25,558,198 km (0.055 R)
- M70: 25,611,006 km (0.078 R)
- M71: 25,663,664 km (0.1 R)
- M72: 26,513,380 km (0.119 R)
- M73: 26,887,973 km (0.116 R)
- M74: 27,210,506 km (0.042 R)
- M75: 27,372,222 km (0.112 R)
- M76: 28,185,735 km (0.119 R)
- M77: 29,117,281 km (0.087 R)
- M78: 32,199,296 km (0.062 R)
- M79: 32,656,168 km (0.071 R)
- M80: 33,172,729 km (0.103 R)
- M81: 34,039,649 km (0.095 R)
- M82: 34,097,693 km (0.12 R)
- M83: 34,621,734 km (0.097 R)
- M84: 35,795,629 km (0.119 R)
- M85: 36,031,994 km (0.117 R)
- M86: 36,268,957 km (0.11 R)
- M87: 36,744,229 km (0.117 R)
- M88: 37,640,919 km (0.111 R)
- M89: 37,821,184 km (0.069 R)
- M90: 39,273,181 km (0.099 R)
- M91: 39,761,319 km (0.029 R)
- M92: 40,497,191 km (0.107 R)
- M93: 41,175,617 km (0.107 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: 354 - 19,614 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.