G3V Star System Generated (Seed: 1768354826)
Star Details
Spectral Class: G7V
Temperature: 5,400 K
Mass: 0.95 sol
Luminosity: 0.84 lux
Habitable Zone (HZ)
Inner Boundary: 0.87 AU
Outer Boundary: 1.26 AU
Physical Limits
Snow Line: 4.4 AU
Max System Radius: 19.5 AU
Planetary System (8 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 1.93 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.05
Radius: 1.75
Gravity: 1.32 G
Time & Orbit
Eccentricity (e): 0.185
Orbit Range: 1.57 AU - 2.29 AU
Year: 1005 Days
Day: 47.3 Hours
Environment
Temp: -66 °C
Axial Tilt: 26.2 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 2 - Terrestrial
Semi-Major Axis: 3.15 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 2
Radius: 1.32
Gravity: 1.15 G
Time & Orbit
Eccentricity (e): 0.075
Orbit Range: 2.91 AU - 3.39 AU
Year: 2095 Days
Day: 43.3 Hours
Environment
Temp: -121 °C
Axial Tilt: 6.3 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 3 - Terrestrial
Semi-Major Axis: 4.22 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 0.86
Radius: 0.94
Gravity: 0.97 G
Time & Orbit
Eccentricity (e): 0.051
Orbit Range: 4 AU - 4.44 AU
Year: 3249 Days
Day: 18.1 Hours
Environment
Temp: -126 °C
Axial Tilt: 12.3 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (1)
Outer Limit: 65,172,138 km
- M1: 2,349,734 km (0.118 R)
Asteroid Belt
Center: 4.59 AU
Composition
Type: Main (Rocky/Icy Mix)
A dense region of planetesimals and debris.
Boundary
Planet 4 - Gas Giant
Semi-Major Axis: 4.95 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 219
Radius: 14.7
Gravity: 1.01 G
Time & Orbit
Eccentricity (e): 0.231
Orbit Range: 3.81 AU - 6.09 AU
Year: 4127 Days
Day: 13 Hours
Environment
Temp: -143 °C
Axial Tilt: 37.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (69)
Outer Limit: 65,172,138 km
- M1: 300,542 km (0.068 R)
- M2: 522,994 km (0.082 R)
- M3: 628,461 km (0.104 R)
- M4: 760,107 km (0.093 R)
- M5: 875,148 km (0.116 R)
- M6: 1,196,484 km (0.099 R)
- M7: 1,465,760 km (0.086 R)
- M8: 1,613,862 km (0.12 R)
- M9: 1,755,381 km (0.116 R)
- M10: 1,864,438 km (0.09 R)
- M11: 2,205,671 km (0.107 R)
- M12: 2,539,723 km (0.112 R)
- M13: 2,692,014 km (0.09 R)
- M14: 2,847,595 km (0.087 R)
- M15: 2,948,125 km (0.045 R)
- M16: 3,108,644 km (0.075 R)
- M17: 3,212,315 km (0.106 R)
- M18: 3,469,025 km (0.11 R)
- M19: 3,701,351 km (0.027 R)
- M20: 3,875,034 km (0.092 R)
- M21: 4,445,750 km (0.037 R)
- M22: 4,835,452 km (0.081 R)
- M23: 5,467,802 km (0.115 R)
- M24: 5,666,319 km (0.076 R)
- M25: 5,793,926 km (0.055 R)
- M26: 6,015,031 km (0.092 R)
- M27: 6,107,931 km (0.05 R)
- M28: 6,219,980 km (0.046 R)
- M29: 6,522,467 km (0.118 R)
- M30: 6,656,357 km (0.094 R)
- M31: 6,926,830 km (0.098 R)
- M32: 7,141,952 km (0.1 R)
- M33: 7,240,537 km (0.092 R)
- M34: 8,024,729 km (0.102 R)
- M35: 8,147,698 km (0.057 R)
- M36: 8,395,732 km (0.056 R)
- M37: 8,709,289 km (0.057 R)
- M38: 8,878,185 km (0.076 R)
- M39: 8,984,250 km (0.118 R)
- M40: 9,456,081 km (0.07 R)
- M41: 9,586,232 km (0.084 R)
- M42: 10,179,088 km (0.114 R)
- M43: 10,468,859 km (0.092 R)
- M44: 10,603,497 km (0.119 R)
- M45: 10,761,323 km (0.042 R)
- M46: 11,239,438 km (0.052 R)
- M47: 11,539,082 km (0.104 R)
- M48: 11,747,921 km (0.063 R)
- M49: 11,864,607 km (0.106 R)
- M50: 12,075,540 km (0.087 R)
- M51: 12,548,569 km (0.055 R)
- M52: 13,124,520 km (0.07 R)
- M53: 13,294,015 km (0.11 R)
- M54: 13,391,253 km (0.081 R)
- M55: 13,955,088 km (0.098 R)
- M56: 14,153,006 km (0.108 R)
- M57: 14,401,637 km (0.083 R)
- M58: 14,827,842 km (0.053 R)
- M59: 15,411,124 km (0.075 R)
- M60: 15,641,355 km (0.109 R)
- M61: 15,847,052 km (0.029 R)
- M62: 16,027,766 km (0.051 R)
- M63: 16,339,079 km (0.095 R)
- M64: 16,495,559 km (0.089 R)
- M65: 16,888,852 km (0.11 R)
- M66: 17,471,236 km (0.098 R)
- M67: 17,631,156 km (0.081 R)
- M68: 17,764,897 km (0.066 R)
- M69: 18,060,203 km (0.039 R)
Planet 5 - Gas Giant
Semi-Major Axis: 5.86 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 792.8
Radius: 10.9
Gravity: 6.67 G
Time & Orbit
Eccentricity (e): 0.034
Orbit Range: 5.66 AU - 6.06 AU
Year: 5316 Days
Day: 6 Hours
Environment
Temp: -159 °C
Axial Tilt: 33.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (76)
Outer Limit: 65,172,138 km
- M1: 154,834 km (0.1 R)
- M2: 228,586 km (0.078 R)
- M3: 306,526 km (0.095 R)
- M4: 525,537 km (0.078 R)
- M5: 705,952 km (0.109 R)
- M6: 1,098,647 km (0.115 R)
- M7: 1,222,813 km (0.06 R)
- M8: 1,418,188 km (0.116 R)
- M9: 2,008,202 km (0.091 R)
- M10: 2,161,988 km (0.085 R)
- M11: 2,400,298 km (0.103 R)
- M12: 2,543,313 km (0.119 R)
- M13: 3,787,070 km (0.077 R)
- M14: 3,882,364 km (0.082 R)
- M15: 4,026,726 km (0.113 R)
- M16: 4,148,499 km (0.114 R)
- M17: 4,622,275 km (0.095 R)
- M18: 4,801,194 km (0.077 R)
- M19: 5,218,871 km (0.077 R)
- M20: 5,432,048 km (0.065 R)
- M21: 5,675,444 km (0.116 R)
- M22: 6,061,257 km (0.099 R)
- M23: 6,342,052 km (0.038 R)
- M24: 7,269,260 km (0.105 R)
- M25: 7,507,719 km (0.066 R)
- M26: 8,022,934 km (0.101 R)
- M27: 8,115,086 km (0.095 R)
- M28: 8,896,585 km (0.114 R)
- M29: 9,280,304 km (0.104 R)
- M30: 9,506,496 km (0.073 R)
- M31: 9,636,796 km (0.105 R)
- M32: 9,833,068 km (0.099 R)
- M33: 9,931,803 km (0.09 R)
- M34: 10,163,231 km (0.085 R)
- M35: 10,430,113 km (0.034 R)
- M36: 10,834,626 km (0.116 R)
- M37: 11,175,709 km (0.116 R)
- M38: 12,255,506 km (0.116 R)
- M39: 12,397,176 km (0.102 R)
- M40: 12,861,677 km (0.05 R)
- M41: 13,441,219 km (0.098 R)
- M42: 13,514,223 km (0.085 R)
- M43: 14,103,339 km (0.117 R)
- M44: 15,689,376 km (0.064 R)
- M45: 16,075,338 km (0.119 R)
- M46: 16,386,352 km (0.078 R)
- M47: 16,896,032 km (0.102 R)
- M48: 17,291,569 km (0.114 R)
- M49: 18,051,676 km (0.12 R)
- M50: 18,618,652 km (0.11 R)
- M51: 18,822,554 km (0.112 R)
- M52: 20,103,560 km (0.114 R)
- M53: 20,522,733 km (0.115 R)
- M54: 20,817,890 km (0.104 R)
- M55: 20,902,413 km (0.099 R)
- M56: 21,071,907 km (0.091 R)
- M57: 21,199,365 km (0.111 R)
- M58: 21,926,410 km (0.068 R)
- M59: 23,185,576 km (0.033 R)
- M60: 23,492,999 km (0.094 R)
- M61: 23,669,226 km (0.046 R)
- M62: 23,934,463 km (0.088 R)
- M63: 24,378,768 km (0.11 R)
- M64: 24,646,698 km (0.066 R)
- M65: 26,824,693 km (0.066 R)
- M66: 27,750,255 km (0.114 R)
- M67: 28,217,001 km (0.109 R)
- M68: 28,404,297 km (0.031 R)
- M69: 29,490,079 km (0.112 R)
- M70: 30,253,327 km (0.098 R)
- M71: 30,830,027 km (0.115 R)
- M72: 31,023,008 km (0.066 R)
- M73: 31,458,936 km (0.101 R)
- M74: 32,092,034 km (0.089 R)
- M75: 32,238,640 km (0.102 R)
- M76: 32,926,192 km (0.086 R)
Planet 6 - Gas Giant
Semi-Major Axis: 7.39 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 834.3
Radius: 14.6
Gravity: 3.91 G
Time & Orbit
Eccentricity (e): 0.009
Orbit Range: 7.32 AU - 7.46 AU
Year: 7528 Days
Day: 14 Hours
Environment
Temp: -170 °C
Axial Tilt: 45.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (80)
Outer Limit: 65,172,138 km
- M1: 196,422 km (0.109 R)
- M2: 358,436 km (0.114 R)
- M3: 667,356 km (0.086 R)
- M4: 1,495,530 km (0.057 R)
- M5: 1,783,805 km (0.097 R)
- M6: 2,438,595 km (0.12 R)
- M7: 2,805,558 km (0.116 R)
- M8: 3,216,653 km (0.087 R)
- M9: 3,702,547 km (0.032 R)
- M10: 3,982,595 km (0.076 R)
- M11: 4,445,450 km (0.051 R)
- M12: 4,743,449 km (0.056 R)
- M13: 4,986,695 km (0.108 R)
- M14: 5,328,078 km (0.068 R)
- M15: 5,613,062 km (0.097 R)
- M16: 5,709,253 km (0.075 R)
- M17: 5,805,893 km (0.104 R)
- M18: 5,903,132 km (0.075 R)
- M19: 6,198,139 km (0.065 R)
- M20: 6,297,622 km (0.025 R)
- M21: 6,397,553 km (0.107 R)
- M22: 6,498,083 km (0.076 R)
- M23: 7,356,475 km (0.115 R)
- M24: 7,996,605 km (0.072 R)
- M25: 8,507,033 km (0.041 R)
- M26: 8,766,286 km (0.05 R)
- M27: 9,444,712 km (0.119 R)
- M28: 9,713,240 km (0.108 R)
- M29: 10,772,543 km (0.033 R)
- M30: 11,012,797 km (0.085 R)
- M31: 11,336,227 km (0.092 R)
- M32: 11,539,830 km (0.11 R)
- M33: 11,785,919 km (0.087 R)
- M34: 11,992,214 km (0.12 R)
- M35: 12,158,118 km (0.098 R)
- M36: 12,450,432 km (0.063 R)
- M37: 12,956,971 km (0.071 R)
- M38: 13,384,222 km (0.104 R)
- M39: 13,903,028 km (0.083 R)
- M40: 14,077,459 km (0.111 R)
- M41: 14,428,565 km (0.065 R)
- M42: 14,605,091 km (0.063 R)
- M43: 14,960,535 km (0.085 R)
- M44: 15,139,305 km (0.099 R)
- M45: 15,544,116 km (0.111 R)
- M46: 16,410,587 km (0.099 R)
- M47: 16,826,469 km (0.066 R)
- M48: 17,763,251 km (0.115 R)
- M49: 18,333,369 km (0.04 R)
- M50: 19,638,311 km (0.069 R)
- M51: 19,736,148 km (0.095 R)
- M52: 19,981,488 km (0.109 R)
- M53: 21,474,774 km (0.069 R)
- M54: 21,879,137 km (0.078 R)
- M55: 22,849,429 km (0.083 R)
- M56: 24,199,999 km (0.101 R)
- M57: 26,327,879 km (0.095 R)
- M58: 26,706,361 km (0.077 R)
- M59: 27,962,834 km (0.083 R)
- M60: 28,073,088 km (0.049 R)
- M61: 28,792,653 km (0.115 R)
- M62: 29,350,354 km (0.065 R)
- M63: 31,158,992 km (0.115 R)
- M64: 31,559,466 km (0.039 R)
- M65: 32,249,860 km (0.119 R)
- M66: 32,713,015 km (0.059 R)
- M67: 33,353,294 km (0.112 R)
- M68: 33,645,758 km (0.084 R)
- M69: 35,120,643 km (0.101 R)
- M70: 35,597,113 km (0.09 R)
- M71: 35,776,331 km (0.032 R)
- M72: 36,255,642 km (0.053 R)
- M73: 36,436,057 km (0.107 R)
- M74: 36,797,486 km (0.105 R)
- M75: 37,099,674 km (0.055 R)
- M76: 38,500,508 km (0.069 R)
- M77: 39,114,906 km (0.097 R)
- M78: 39,423,228 km (0.072 R)
- M79: 40,477,893 km (0.101 R)
- M80: 42,045,828 km (0.099 R)
Planet 7 - Gas Giant
Semi-Major Axis: 7.44 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 661.1
Radius: 13.8
Gravity: 3.47 G
Time & Orbit
Eccentricity (e): 0.25
Orbit Range: 5.58 AU - 9.3 AU
Year: 7605 Days
Day: 6.4 Hours
Environment
Temp: -156 °C
Axial Tilt: 17.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (79)
Outer Limit: 65,172,138 km
- M1: 251,175 km (0.087 R)
- M2: 610,958 km (0.114 R)
- M3: 706,401 km (0.081 R)
- M4: 1,011,132 km (0.11 R)
- M5: 1,340,397 km (0.095 R)
- M6: 1,684,023 km (0.064 R)
- M7: 1,887,327 km (0.063 R)
- M8: 2,056,073 km (0.085 R)
- M9: 2,523,267 km (0.11 R)
- M10: 2,733,751 km (0.054 R)
- M11: 2,853,280 km (0.072 R)
- M12: 2,999,138 km (0.116 R)
- M13: 3,477,403 km (0.105 R)
- M14: 3,633,583 km (0.079 R)
- M15: 3,765,528 km (0.116 R)
- M16: 4,034,355 km (0.114 R)
- M17: 5,053,865 km (0.099 R)
- M18: 5,471,393 km (0.082 R)
- M19: 6,308,093 km (0.11 R)
- M20: 6,660,546 km (0.109 R)
- M21: 6,790,397 km (0.11 R)
- M22: 6,888,234 km (0.11 R)
- M23: 7,052,492 km (0.1 R)
- M24: 7,317,879 km (0.072 R)
- M25: 7,620,516 km (0.116 R)
- M26: 7,756,500 km (0.041 R)
- M27: 7,996,156 km (0.092 R)
- M28: 8,553,258 km (0.104 R)
- M29: 8,694,479 km (0.077 R)
- M30: 8,800,992 km (0.093 R)
- M31: 8,943,559 km (0.093 R)
- M32: 9,963,517 km (0.118 R)
- M33: 10,112,218 km (0.08 R)
- M34: 10,449,710 km (0.057 R)
- M35: 10,600,804 km (0.068 R)
- M36: 10,943,533 km (0.117 R)
- M37: 11,836,034 km (0.11 R)
- M38: 12,350,950 km (0.096 R)
- M39: 12,873,196 km (0.108 R)
- M40: 13,279,803 km (0.118 R)
- M41: 13,939,230 km (0.067 R)
- M42: 15,118,959 km (0.091 R)
- M43: 16,243,038 km (0.081 R)
- M44: 16,374,385 km (0.06 R)
- M45: 16,550,162 km (0.094 R)
- M46: 16,815,100 km (0.103 R)
- M47: 17,036,954 km (0.12 R)
- M48: 17,349,015 km (0.112 R)
- M49: 17,663,170 km (0.034 R)
- M50: 18,662,484 km (0.077 R)
- M51: 19,680,198 km (0.096 R)
- M52: 21,001,447 km (0.073 R)
- M53: 21,144,761 km (0.044 R)
- M54: 23,729,065 km (0.084 R)
- M55: 23,878,363 km (0.12 R)
- M56: 23,977,996 km (0.119 R)
- M57: 24,127,893 km (0.078 R)
- M58: 24,328,055 km (0.119 R)
- M59: 24,478,550 km (0.115 R)
- M60: 24,780,438 km (0.116 R)
- M61: 25,134,387 km (0.049 R)
- M62: 27,292,336 km (0.062 R)
- M63: 28,130,084 km (0.073 R)
- M64: 28,446,334 km (0.087 R)
- M65: 29,349,008 km (0.056 R)
- M66: 29,509,227 km (0.085 R)
- M67: 30,530,981 km (0.099 R)
- M68: 31,345,840 km (0.097 R)
- M69: 32,664,545 km (0.047 R)
- M70: 33,163,754 km (0.064 R)
- M71: 33,275,054 km (0.064 R)
- M72: 34,394,495 km (0.092 R)
- M73: 36,211,511 km (0.059 R)
- M74: 36,555,586 km (0.107 R)
- M75: 37,710,631 km (0.09 R)
- M76: 38,409,403 km (0.095 R)
- M77: 38,643,224 km (0.112 R)
- M78: 39,171,155 km (0.051 R)
- M79: 39,288,739 km (0.065 R)
Planet 8 - Ice Giant
Semi-Major Axis: 12.56 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 618.8
Radius: 6.5
Gravity: 14.65 G
Time & Orbit
Eccentricity (e): 0.206
Orbit Range: 9.97 AU - 15.15 AU
Year: 16681 Days
Day: 23.4 Hours
Environment
Temp: -180 °C
Axial Tilt: 31.5 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (92)
Outer Limit: 65,172,138 km
- M1: 97,239 km (0.091 R)
- M2: 200,461 km (0.102 R)
- M3: 369,656 km (0.115 R)
- M4: 1,134,700 km (0.074 R)
- M5: 1,184,516 km (0.101 R)
- M6: 1,260,661 km (0.104 R)
- M7: 1,364,632 km (0.05 R)
- M8: 2,652,520 km (0.11 R)
- M9: 2,820,518 km (0.077 R)
- M10: 2,992,107 km (0.056 R)
- M11: 3,096,676 km (0.066 R)
- M12: 4,285,829 km (0.034 R)
- M13: 4,724,002 km (0.091 R)
- M14: 5,010,332 km (0.115 R)
- M15: 5,051,770 km (0.051 R)
- M16: 6,569,890 km (0.112 R)
- M17: 7,213,909 km (0.111 R)
- M18: 7,401,654 km (0.117 R)
- M19: 7,496,050 km (0.093 R)
- M20: 7,926,144 km (0.082 R)
- M21: 8,561,337 km (0.11 R)
- M22: 9,314,562 km (0.074 R)
- M23: 9,673,298 km (0.057 R)
- M24: 10,563,255 km (0.06 R)
- M25: 10,829,988 km (0.066 R)
- M26: 10,883,544 km (0.055 R)
- M27: 12,420,214 km (0.119 R)
- M28: 12,588,810 km (0.1 R)
- M29: 13,558,803 km (0.077 R)
- M30: 14,375,607 km (0.116 R)
- M31: 14,849,384 km (0.111 R)
- M32: 15,148,131 km (0.071 R)
- M33: 17,671,697 km (0.106 R)
- M34: 18,115,405 km (0.108 R)
- M35: 18,370,619 km (0.036 R)
- M36: 18,434,646 km (0.066 R)
- M37: 18,820,160 km (0.09 R)
- M38: 19,926,736 km (0.1 R)
- M39: 19,992,409 km (0.05 R)
- M40: 20,853,794 km (0.054 R)
- M41: 21,659,528 km (0.081 R)
- M42: 22,270,635 km (0.117 R)
- M43: 22,338,852 km (0.094 R)
- M44: 22,543,950 km (0.095 R)
- M45: 23,927,581 km (0.068 R)
- M46: 24,207,479 km (0.089 R)
- M47: 25,054,053 km (0.099 R)
- M48: 25,267,230 km (0.114 R)
- M49: 25,409,647 km (0.084 R)
- M50: 25,695,229 km (0.12 R)
- M51: 27,871,430 km (0.086 R)
- M52: 28,018,634 km (0.066 R)
- M53: 28,609,845 km (0.109 R)
- M54: 28,832,596 km (0.099 R)
- M55: 29,130,595 km (0.077 R)
- M56: 29,504,440 km (0.09 R)
- M57: 30,181,370 km (0.112 R)
- M58: 30,635,550 km (0.1 R)
- M59: 30,787,391 km (0.114 R)
- M60: 32,320,022 km (0.12 R)
- M61: 33,173,477 km (0.118 R)
- M62: 33,251,418 km (0.107 R)
- M63: 33,720,557 km (0.095 R)
- M64: 33,798,946 km (0.038 R)
- M65: 35,140,689 km (0.117 R)
- M66: 35,698,241 km (0.114 R)
- M67: 36,660,903 km (0.103 R)
- M68: 38,447,700 km (0.104 R)
- M69: 39,269,142 km (0.119 R)
- M70: 40,262,621 km (0.107 R)
- M71: 40,929,529 km (0.053 R)
- M72: 41,180,703 km (0.119 R)
- M73: 42,867,270 km (0.11 R)
- M74: 43,548,239 km (0.08 R)
- M75: 44,232,650 km (0.088 R)
- M76: 44,834,482 km (0.114 R)
- M77: 45,093,286 km (0.101 R)
- M78: 46,307,572 km (0.031 R)
- M79: 46,481,854 km (0.049 R)
- M80: 47,884,334 km (0.118 R)
- M81: 50,461,606 km (0.11 R)
- M82: 53,814,543 km (0.105 R)
- M83: 55,286,735 km (0.081 R)
- M84: 58,835,646 km (0.072 R)
- M85: 59,308,076 km (0.091 R)
- M86: 60,161,532 km (0.067 R)
- M87: 61,210,362 km (0.096 R)
- M88: 61,593,183 km (0.082 R)
- M89: 62,072,944 km (0.11 R)
- M90: 63,616,195 km (0.081 R)
- M91: 64,392,608 km (0.101 R)
- M92: 64,684,623 km (0.039 R)
Kuiper Belt
Range: 30 - 59 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 548 - 18,225 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.