G7V Star System Generated (Seed: 1766997958)
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: 1.09 AU
Status: HZ
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.76
Radius: 1.87
Gravity: 1.36 G
Time & Orbit
Eccentricity (e): 0.132
Orbit Range: 0.95 AU - 1.23 AU
Year: 412 Days
Day: 32.2 Hours
Environment
Temp: 26 °C
Axial Tilt: 4.5 °
Atmosphere: Nâ‚‚, Oâ‚‚
Biome: Oceanic/Continental
Planet 2 - Terrestrial
Semi-Major Axis: 3.73 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.62
Radius: 1.84
Gravity: 1.36 G
Time & Orbit
Eccentricity (e): 0.178
Orbit Range: 3.07 AU - 4.39 AU
Year: 2605 Days
Day: 47.9 Hours
Environment
Temp: -113 °C
Axial Tilt: 22.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 3 - Gas Giant
Semi-Major Axis: 6.83 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 654.7
Radius: 14.8
Gravity: 2.99 G
Time & Orbit
Eccentricity (e): 0.025
Orbit Range: 6.66 AU - 7 AU
Year: 6455 Days
Day: 7.1 Hours
Environment
Temp: -162 °C
Axial Tilt: 26.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (66)
Outer Limit: 24,161,491 km
- M1: 276,008 km (0.041 R)
- M2: 384,915 km (0.074 R)
- M3: 541,544 km (0.062 R)
- M4: 648,956 km (0.098 R)
- M5: 904,618 km (0.104 R)
- M6: 1,084,285 km (0.104 R)
- M7: 1,293,423 km (0.117 R)
- M8: 1,534,425 km (0.048 R)
- M9: 1,904,979 km (0.087 R)
- M10: 2,686,628 km (0.119 R)
- M11: 2,885,593 km (0.109 R)
- M12: 3,251,659 km (0.106 R)
- M13: 3,608,600 km (0.09 R)
- M14: 3,730,373 km (0.081 R)
- M15: 3,828,958 km (0.095 R)
- M16: 3,928,290 km (0.116 R)
- M17: 4,231,825 km (0.059 R)
- M18: 5,270,931 km (0.109 R)
- M19: 5,748,149 km (0.115 R)
- M20: 5,862,441 km (0.092 R)
- M21: 6,654,113 km (0.067 R)
- M22: 6,774,390 km (0.086 R)
- M23: 6,925,633 km (0.112 R)
- M24: 7,698,905 km (0.101 R)
- M25: 8,337,239 km (0.107 R)
- M26: 8,630,152 km (0.114 R)
- M27: 8,926,505 km (0.108 R)
- M28: 10,007,350 km (0.094 R)
- M29: 11,380,209 km (0.095 R)
- M30: 11,488,219 km (0.093 R)
- M31: 12,180,558 km (0.04 R)
- M32: 13,644,074 km (0.105 R)
- M33: 13,912,602 km (0.075 R)
- M34: 14,144,179 km (0.075 R)
- M35: 14,260,417 km (0.076 R)
- M36: 14,376,954 km (0.095 R)
- M37: 15,043,861 km (0.087 R)
- M38: 15,202,136 km (0.085 R)
- M39: 15,720,642 km (0.073 R)
- M40: 16,488,977 km (0.042 R)
- M41: 17,062,984 km (0.066 R)
- M42: 18,484,163 km (0.081 R)
- M43: 19,252,049 km (0.102 R)
- M44: 20,248,221 km (0.12 R)
- M45: 20,995,313 km (0.119 R)
- M46: 21,172,437 km (0.032 R)
- M47: 21,751,530 km (0.07 R)
- M48: 22,290,681 km (0.112 R)
- M49: 22,925,275 km (0.09 R)
- M50: 23,336,520 km (0.109 R)
- M51: 23,888,386 km (0.064 R)
- M52: 27,096,812 km (0.062 R)
- M53: 27,193,303 km (0.11 R)
- M54: 27,725,572 km (0.072 R)
- M55: 28,898,718 km (0.092 R)
- M56: 30,638,691 km (0.102 R)
- M57: 30,940,430 km (0.102 R)
- M58: 31,243,216 km (0.079 R)
- M59: 31,699,041 km (0.062 R)
- M60: 32,720,046 km (0.03 R)
- M61: 32,873,982 km (0.043 R)
- M62: 33,699,912 km (0.117 R)
- M63: 34,323,735 km (0.057 R)
- M64: 34,428,155 km (0.057 R)
- M65: 34,951,448 km (0.039 R)
- M66: 35,161,484 km (0.117 R)
Planet 4 - Gas Giant
Semi-Major Axis: 9.64 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 87.1
Radius: 9.8
Gravity: 0.91 G
Time & Orbit
Eccentricity (e): 0.25
Orbit Range: 7.23 AU - 12.05 AU
Year: 10824 Days
Day: 12.3 Hours
Environment
Temp: -167 °C
Axial Tilt: 20.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (53)
Outer Limit: 24,161,491 km
- M1: 173,085 km (0.119 R)
- M2: 273,465 km (0.118 R)
- M3: 355,295 km (0.09 R)
- M4: 994,676 km (0.111 R)
- M5: 1,173,147 km (0.11 R)
- M6: 1,307,186 km (0.08 R)
- M7: 1,460,823 km (0.09 R)
- M8: 1,786,049 km (0.094 R)
- M9: 2,199,687 km (0.076 R)
- M10: 2,366,788 km (0.092 R)
- M11: 2,486,317 km (0.105 R)
- M12: 2,767,112 km (0.115 R)
- M13: 2,911,324 km (0.062 R)
- M14: 3,151,130 km (0.118 R)
- M15: 3,848,704 km (0.101 R)
- M16: 3,969,430 km (0.119 R)
- M17: 4,235,714 km (0.079 R)
- M18: 4,742,552 km (0.071 R)
- M19: 5,157,536 km (0.102 R)
- M20: 5,606,928 km (0.075 R)
- M21: 6,022,361 km (0.062 R)
- M22: 6,210,107 km (0.076 R)
- M23: 6,519,475 km (0.051 R)
- M24: 7,029,754 km (0.117 R)
- M25: 7,178,005 km (0.115 R)
- M26: 7,252,505 km (0.114 R)
- M27: 7,755,752 km (0.116 R)
- M28: 8,166,398 km (0.09 R)
- M29: 8,822,385 km (0.073 R)
- M30: 8,982,455 km (0.117 R)
- M31: 10,184,773 km (0.094 R)
- M32: 11,669,831 km (0.117 R)
- M33: 11,845,608 km (0.043 R)
- M34: 12,677,223 km (0.098 R)
- M35: 13,804,742 km (0.054 R)
- M36: 13,897,642 km (0.115 R)
- M37: 14,271,038 km (0.074 R)
- M38: 14,742,421 km (0.108 R)
- M39: 14,805,701 km (0.08 R)
- M40: 17,542,594 km (0.105 R)
- M41: 17,743,953 km (0.119 R)
- M42: 18,523,208 km (0.038 R)
- M43: 19,002,819 km (0.118 R)
- M44: 19,625,745 km (0.056 R)
- M45: 19,939,601 km (0.111 R)
- M46: 20,501,790 km (0.039 R)
- M47: 21,354,797 km (0.027 R)
- M48: 22,002,256 km (0.111 R)
- M49: 22,146,918 km (0.119 R)
- M50: 23,574,680 km (0.092 R)
- M51: 23,685,831 km (0.091 R)
- M52: 24,655,674 km (0.096 R)
- M53: 24,956,665 km (0.115 R)
Planet 5 - Gas Giant
Semi-Major Axis: 10 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 586.7
Radius: 8.7
Gravity: 7.75 G
Time & Orbit
Eccentricity (e): 0.181
Orbit Range: 8.19 AU - 11.81 AU
Year: 11436 Days
Day: 10.4 Hours
Environment
Temp: -173 °C
Axial Tilt: 3.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (88)
Outer Limit: 24,161,491 km
- M1: 109,805 km (0.077 R)
- M2: 173,534 km (0.11 R)
- M3: 228,137 km (0.063 R)
- M4: 433,385 km (0.095 R)
- M5: 520,601 km (0.053 R)
- M6: 784,192 km (0.096 R)
- M7: 988,992 km (0.092 R)
- M8: 1,339,200 km (0.055 R)
- M9: 1,494,333 km (0.028 R)
- M10: 1,726,359 km (0.101 R)
- M11: 2,517,583 km (0.094 R)
- M12: 2,738,239 km (0.069 R)
- M13: 3,051,797 km (0.07 R)
- M14: 3,139,461 km (0.073 R)
- M15: 3,227,873 km (0.104 R)
- M16: 3,407,241 km (0.111 R)
- M17: 3,713,618 km (0.111 R)
- M18: 3,838,532 km (0.11 R)
- M19: 4,222,101 km (0.111 R)
- M20: 4,991,333 km (0.09 R)
- M21: 6,466,966 km (0.109 R)
- M22: 7,115,922 km (0.041 R)
- M23: 7,193,713 km (0.102 R)
- M24: 8,516,457 km (0.064 R)
- M25: 8,806,677 km (0.098 R)
- M26: 9,142,225 km (0.072 R)
- M27: 10,482,024 km (0.096 R)
- M28: 11,016,986 km (0.058 R)
- M29: 11,698,105 km (0.101 R)
- M30: 13,340,091 km (0.041 R)
- M31: 13,677,135 km (0.118 R)
- M32: 15,555,187 km (0.112 R)
- M33: 15,656,165 km (0.056 R)
- M34: 15,808,306 km (0.117 R)
- M35: 16,575,743 km (0.069 R)
- M36: 17,094,100 km (0.077 R)
- M37: 17,355,148 km (0.076 R)
- M38: 18,253,184 km (0.119 R)
- M39: 18,359,698 km (0.072 R)
- M40: 18,788,296 km (0.064 R)
- M41: 19,166,030 km (0.026 R)
- M42: 19,437,401 km (0.041 R)
- M43: 20,038,934 km (0.058 R)
- M44: 20,480,098 km (0.115 R)
- M45: 20,701,952 km (0.109 R)
- M46: 21,372,300 km (0.092 R)
- M47: 22,448,058 km (0.096 R)
- M48: 23,021,317 km (0.066 R)
- M49: 24,299,481 km (0.06 R)
- M50: 24,652,084 km (0.09 R)
- M51: 24,829,058 km (0.039 R)
- M52: 24,888,149 km (0.111 R)
- M53: 25,779,752 km (0.06 R)
- M54: 26,139,386 km (0.041 R)
- M55: 26,259,662 km (0.09 R)
- M56: 28,455,161 km (0.112 R)
- M57: 28,516,945 km (0.096 R)
- M58: 30,899,291 km (0.083 R)
- M59: 31,408,971 km (0.115 R)
- M60: 32,242,979 km (0.036 R)
- M61: 33,344,767 km (0.119 R)
- M62: 33,409,992 km (0.06 R)
- M63: 33,475,216 km (0.048 R)
- M64: 33,605,815 km (0.044 R)
- M65: 34,195,530 km (0.108 R)
- M66: 35,918,449 km (0.115 R)
- M67: 36,521,478 km (0.055 R)
- M68: 36,655,966 km (0.119 R)
- M69: 38,282,095 km (0.095 R)
- M70: 38,487,044 km (0.113 R)
- M71: 38,623,926 km (0.12 R)
- M72: 39,931,711 km (0.038 R)
- M73: 40,000,975 km (0.104 R)
- M74: 40,278,329 km (0.061 R)
- M75: 40,765,270 km (0.043 R)
- M76: 41,885,459 km (0.088 R)
- M77: 41,955,920 km (0.096 R)
- M78: 42,096,691 km (0.045 R)
- M79: 42,520,053 km (0.076 R)
- M80: 42,803,092 km (0.086 R)
- M81: 44,802,019 km (0.106 R)
- M82: 44,873,976 km (0.074 R)
- M83: 46,175,627 km (0.088 R)
- M84: 47,416,391 km (0.054 R)
- M85: 48,225,118 km (0.047 R)
- M86: 48,520,274 km (0.072 R)
- M87: 48,742,128 km (0.111 R)
- M88: 49,260,933 km (0.083 R)
Planet 6 - Gas Giant
Semi-Major Axis: 12.54 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 66.9
Radius: 8.4
Gravity: 0.95 G
Time & Orbit
Eccentricity (e): 0.069
Orbit Range: 11.67 AU - 13.41 AU
Year: 16060 Days
Day: 6.7 Hours
Environment
Temp: -192 °C
Axial Tilt: 39.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (79)
Outer Limit: 24,161,491 km
- M1: 107,112 km (0.104 R)
- M2: 196,272 km (0.081 R)
- M3: 269,127 km (0.078 R)
- M4: 421,716 km (0.114 R)
- M5: 547,827 km (0.083 R)
- M6: 905,366 km (0.112 R)
- M7: 1,235,230 km (0.119 R)
- M8: 1,421,778 km (0.037 R)
- M9: 1,518,418 km (0.102 R)
- M10: 1,634,207 km (0.073 R)
- M11: 1,963,173 km (0.113 R)
- M12: 2,742,279 km (0.093 R)
- M13: 2,802,716 km (0.115 R)
- M14: 2,925,087 km (0.042 R)
- M15: 3,090,991 km (0.097 R)
- M16: 3,259,887 km (0.109 R)
- M17: 3,607,104 km (0.039 R)
- M18: 3,785,275 km (0.101 R)
- M19: 3,898,072 km (0.092 R)
- M20: 4,057,842 km (0.067 R)
- M21: 4,598,040 km (0.093 R)
- M22: 4,694,381 km (0.085 R)
- M23: 5,261,058 km (0.108 R)
- M24: 5,745,456 km (0.071 R)
- M25: 6,006,205 km (0.071 R)
- M26: 6,138,001 km (0.056 R)
- M27: 6,244,215 km (0.099 R)
- M28: 7,115,324 km (0.083 R)
- M29: 7,508,467 km (0.11 R)
- M30: 7,565,164 km (0.108 R)
- M31: 8,345,018 km (0.09 R)
- M32: 8,492,222 km (0.105 R)
- M33: 8,640,324 km (0.114 R)
- M34: 8,909,152 km (0.058 R)
- M35: 9,731,940 km (0.091 R)
- M36: 9,949,156 km (0.087 R)
- M37: 10,136,752 km (0.054 R)
- M38: 10,262,414 km (0.076 R)
- M39: 10,388,525 km (0.107 R)
- M40: 10,515,234 km (0.115 R)
- M41: 11,124,098 km (0.118 R)
- M42: 11,188,874 km (0.094 R)
- M43: 11,711,419 km (0.1 R)
- M44: 12,543,931 km (0.071 R)
- M45: 13,292,220 km (0.09 R)
- M46: 13,567,779 km (0.102 R)
- M47: 13,775,870 km (0.071 R)
- M48: 14,406,275 km (0.114 R)
- M49: 14,796,127 km (0.118 R)
- M50: 15,010,202 km (0.086 R)
- M51: 16,611,647 km (0.118 R)
- M52: 16,983,248 km (0.087 R)
- M53: 17,319,843 km (0.106 R)
- M54: 17,696,531 km (0.025 R)
- M55: 17,999,915 km (0.037 R)
- M56: 18,611,621 km (0.072 R)
- M57: 19,036,179 km (0.113 R)
- M58: 19,230,208 km (0.116 R)
- M59: 19,542,119 km (0.062 R)
- M60: 20,329,004 km (0.107 R)
- M61: 20,527,371 km (0.034 R)
- M62: 21,005,935 km (0.084 R)
- M63: 22,096,353 km (0.052 R)
- M64: 22,463,915 km (0.102 R)
- M65: 22,586,885 km (0.046 R)
- M66: 22,874,711 km (0.069 R)
- M67: 22,957,140 km (0.105 R)
- M68: 23,163,734 km (0.118 R)
- M69: 23,870,584 km (0.074 R)
- M70: 24,037,984 km (0.118 R)
- M71: 24,121,759 km (0.091 R)
- M72: 25,947,601 km (0.052 R)
- M73: 26,033,620 km (0.098 R)
- M74: 26,378,593 km (0.05 R)
- M75: 27,247,457 km (0.094 R)
- M76: 27,729,461 km (0.113 R)
- M77: 28,391,282 km (0.058 R)
- M78: 29,013,609 km (0.113 R)
- M79: 29,595,396 km (0.081 R)
Planet 7 - Ice Giant
Semi-Major Axis: 15.31 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 772.8
Radius: 5.7
Gravity: 23.79 G
Time & Orbit
Eccentricity (e): 0.21
Orbit Range: 12.09 AU - 18.53 AU
Year: 21665 Days
Day: 17.6 Hours
Environment
Temp: -189 °C
Axial Tilt: 9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (92)
Outer Limit: 24,161,491 km
- M1: 362,027 km (0.107 R)
- M2: 441,164 km (0.046 R)
- M3: 641,027 km (0.066 R)
- M4: 689,197 km (0.105 R)
- M5: 948,750 km (0.088 R)
- M6: 1,236,875 km (0.117 R)
- M7: 1,717,384 km (0.034 R)
- M8: 2,103,196 km (0.062 R)
- M9: 2,287,202 km (0.092 R)
- M10: 2,324,751 km (0.115 R)
- M11: 2,476,593 km (0.104 R)
- M12: 2,951,716 km (0.045 R)
- M13: 2,992,556 km (0.102 R)
- M14: 3,368,794 km (0.036 R)
- M15: 3,804,423 km (0.052 R)
- M16: 3,848,854 km (0.099 R)
- M17: 5,263,751 km (0.106 R)
- M18: 5,413,349 km (0.118 R)
- M19: 6,077,413 km (0.104 R)
- M20: 6,181,982 km (0.112 R)
- M21: 6,234,342 km (0.094 R)
- M22: 7,258,937 km (0.12 R)
- M23: 8,104,016 km (0.079 R)
- M24: 8,567,470 km (0.092 R)
- M25: 8,684,605 km (0.052 R)
- M26: 9,885,577 km (0.072 R)
- M27: 10,008,546 km (0.112 R)
- M28: 10,568,042 km (0.101 R)
- M29: 11,393,972 km (0.068 R)
- M30: 11,587,552 km (0.047 R)
- M31: 12,109,050 km (0.08 R)
- M32: 12,972,679 km (0.116 R)
- M33: 14,758,578 km (0.05 R)
- M34: 14,828,739 km (0.105 R)
- M35: 14,969,511 km (0.081 R)
- M36: 15,895,372 km (0.111 R)
- M37: 16,401,611 km (0.094 R)
- M38: 17,801,847 km (0.112 R)
- M39: 18,478,479 km (0.065 R)
- M40: 18,554,175 km (0.114 R)
- M41: 20,715,266 km (0.111 R)
- M42: 21,030,469 km (0.106 R)
- M43: 22,711,051 km (0.117 R)
- M44: 22,873,365 km (0.102 R)
- M45: 23,117,509 km (0.04 R)
- M46: 23,199,039 km (0.079 R)
- M47: 24,185,488 km (0.079 R)
- M48: 24,517,445 km (0.089 R)
- M49: 25,185,550 km (0.103 R)
- M50: 26,882,139 km (0.12 R)
- M51: 26,968,008 km (0.077 R)
- M52: 29,672,438 km (0.085 R)
- M53: 30,384,375 km (0.115 R)
- M54: 30,563,144 km (0.074 R)
- M55: 31,734,196 km (0.099 R)
- M56: 32,736,352 km (0.083 R)
- M57: 33,656,529 km (0.09 R)
- M58: 34,865,429 km (0.107 R)
- M59: 36,182,938 km (0.096 R)
- M60: 37,612,794 km (0.106 R)
- M61: 37,708,686 km (0.085 R)
- M62: 39,060,902 km (0.076 R)
- M63: 40,134,416 km (0.115 R)
- M64: 41,217,654 km (0.108 R)
- M65: 43,412,704 km (0.043 R)
- M66: 43,715,041 km (0.102 R)
- M67: 44,321,660 km (0.087 R)
- M68: 45,032,849 km (0.048 R)
- M69: 45,952,876 km (0.065 R)
- M70: 46,055,500 km (0.086 R)
- M71: 46,158,273 km (0.104 R)
- M72: 46,363,821 km (0.071 R)
- M73: 47,292,674 km (0.104 R)
- M74: 52,671,466 km (0.067 R)
- M75: 52,778,727 km (0.079 R)
- M76: 54,398,274 km (0.12 R)
- M77: 55,050,670 km (0.049 R)
- M78: 55,159,577 km (0.105 R)
- M79: 60,699,336 km (0.087 R)
- M80: 61,262,871 km (0.111 R)
- M81: 63,078,241 km (0.096 R)
- M82: 64,336,359 km (0.112 R)
- M83: 65,487,365 km (0.111 R)
- M84: 65,833,984 km (0.116 R)
- M85: 67,343,127 km (0.085 R)
- M86: 67,926,559 km (0.062 R)
- M87: 71,462,304 km (0.099 R)
- M88: 71,700,165 km (0.037 R)
- M89: 74,574,688 km (0.085 R)
- M90: 74,695,264 km (0.1 R)
- M91: 81,178,686 km (0.11 R)
- M92: 81,923,833 km (0.052 R)
Planet 8 - Ice Giant
Semi-Major Axis: 15.65 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 17.5
Radius: 3.2
Gravity: 1.71 G
Time & Orbit
Eccentricity (e): 0.055
Orbit Range: 14.79 AU - 16.51 AU
Year: 22390 Days
Day: 22.7 Hours
Environment
Temp: -196 °C
Axial Tilt: 47.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (24)
Outer Limit: 24,161,491 km
- M1: 48,320 km (0.037 R)
- M2: 359,484 km (0.062 R)
- M3: 439,519 km (0.069 R)
- M4: 565,330 km (0.101 R)
- M5: 1,249,591 km (0.052 R)
- M6: 1,820,905 km (0.104 R)
- M7: 2,053,380 km (0.103 R)
- M8: 2,683,187 km (0.033 R)
- M9: 3,865,459 km (0.109 R)
- M10: 4,223,447 km (0.07 R)
- M11: 5,337,203 km (0.11 R)
- M12: 5,359,045 km (0.032 R)
- M13: 6,841,410 km (0.055 R)
- M14: 8,440,461 km (0.093 R)
- M15: 8,928,749 km (0.097 R)
- M16: 9,986,406 km (0.107 R)
- M17: 10,557,271 km (0.058 R)
- M18: 10,667,226 km (0.073 R)
- M19: 11,166,583 km (0.048 R)
- M20: 13,120,780 km (0.082 R)
- M21: 17,041,591 km (0.109 R)
- M22: 19,783,122 km (0.098 R)
- M23: 23,084,148 km (0.095 R)
- M24: 23,584,852 km (0.088 R)
Kuiper Belt
Range: 30.3 - 47.3 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 399 - 10,739 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.