G8V Star System Generated (Seed: 1767215682)
Star Details
Spectral Class: G6V
Temperature: 5,520 K
Mass: 0.98 sol
Luminosity: 0.93 lux
Habitable Zone (HZ)
Inner Boundary: 0.92 AU
Outer Boundary: 1.32 AU
Physical Limits
Snow Line: 4.63 AU
Max System Radius: 19.8 AU
Planetary System (7 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 1.27 AU
Status: HZ
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 0.32
Radius: 0.63
Gravity: 0.81 G
Time & Orbit
Eccentricity (e): 0.243
Orbit Range: 0.96 AU - 1.58 AU
Year: 528 Days
Day: 41.6 Hours
Environment
Temp: 7 °C
Axial Tilt: 7.4 °
Atmosphere: Nâ‚‚, Oâ‚‚
Biome: Arid/Tundra
Planet 2 - Terrestrial
Semi-Major Axis: 2.54 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.81
Radius: 1.71
Gravity: 1.3 G
Time & Orbit
Eccentricity (e): 0.234
Orbit Range: 1.95 AU - 3.13 AU
Year: 1494 Days
Day: 25.9 Hours
Environment
Temp: -85 °C
Axial Tilt: 44.8 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Asteroid Belt
Center: 3.63 AU
Composition
Type: Inner (Rocky/Metallic)
A dense region of planetesimals and debris.
Boundary
Planet 3 - Gas Giant
Semi-Major Axis: 4.72 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 441.1
Radius: 14.2
Gravity: 2.19 G
Time & Orbit
Eccentricity (e): 0.108
Orbit Range: 4.21 AU - 5.23 AU
Year: 3783 Days
Day: 10.1 Hours
Environment
Temp: -139 °C
Axial Tilt: 0.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (70)
Outer Limit: 66,321,969 km
- M1: 461,210 km (0.106 R)
- M2: 690,095 km (0.1 R)
- M3: 785,688 km (0.115 R)
- M4: 938,876 km (0.101 R)
- M5: 1,160,131 km (0.12 R)
- M6: 1,325,736 km (0.11 R)
- M7: 1,449,304 km (0.097 R)
- M8: 1,655,450 km (0.033 R)
- M9: 1,983,369 km (0.059 R)
- M10: 2,258,030 km (0.082 R)
- M11: 2,347,490 km (0.106 R)
- M12: 2,685,880 km (0.115 R)
- M13: 2,877,216 km (0.115 R)
- M14: 3,206,331 km (0.082 R)
- M15: 3,341,418 km (0.025 R)
- M16: 3,478,599 km (0.107 R)
- M17: 3,670,234 km (0.091 R)
- M18: 3,991,421 km (0.11 R)
- M19: 4,229,281 km (0.109 R)
- M20: 4,359,282 km (0.113 R)
- M21: 4,699,916 km (0.117 R)
- M22: 4,815,406 km (0.107 R)
- M23: 5,108,318 km (0.048 R)
- M24: 5,427,261 km (0.051 R)
- M25: 5,548,585 km (0.05 R)
- M26: 5,835,215 km (0.101 R)
- M27: 6,001,268 km (0.078 R)
- M28: 6,616,415 km (0.11 R)
- M29: 6,767,808 km (0.096 R)
- M30: 6,964,379 km (0.114 R)
- M31: 7,452,816 km (0.105 R)
- M32: 7,746,776 km (0.08 R)
- M33: 7,883,658 km (0.087 R)
- M34: 8,322,728 km (0.09 R)
- M35: 8,439,564 km (0.064 R)
- M36: 8,888,657 km (0.101 R)
- M37: 9,418,532 km (0.059 R)
- M38: 9,662,826 km (0.099 R)
- M39: 9,835,162 km (0.098 R)
- M40: 9,934,047 km (0.071 R)
- M41: 10,711,656 km (0.071 R)
- M42: 10,966,721 km (0.074 R)
- M43: 11,069,345 km (0.114 R)
- M44: 11,353,132 km (0.097 R)
- M45: 11,954,366 km (0.117 R)
- M46: 12,219,004 km (0.088 R)
- M47: 12,727,338 km (0.045 R)
- M48: 12,835,198 km (0.059 R)
- M49: 13,024,739 km (0.117 R)
- M50: 13,488,941 km (0.099 R)
- M51: 13,598,895 km (0.088 R)
- M52: 13,847,527 km (0.114 R)
- M53: 13,986,354 km (0.072 R)
- M54: 14,181,429 km (0.109 R)
- M55: 14,659,095 km (0.038 R)
- M56: 15,227,717 km (0.108 R)
- M57: 15,861,563 km (0.109 R)
- M58: 16,152,531 km (0.115 R)
- M59: 16,269,516 km (0.077 R)
- M60: 16,415,973 km (0.091 R)
- M61: 16,887,804 km (0.067 R)
- M62: 17,185,055 km (0.072 R)
- M63: 17,334,204 km (0.104 R)
- M64: 19,096,767 km (0.103 R)
- M65: 19,220,484 km (0.092 R)
- M66: 19,468,517 km (0.116 R)
- M67: 20,124,953 km (0.079 R)
- M68: 20,947,741 km (0.031 R)
- M69: 21,363,324 km (0.114 R)
- M70: 21,620,333 km (0.067 R)
Planet 4 - Gas Giant
Semi-Major Axis: 4.93 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 763.2
Radius: 11.1
Gravity: 6.19 G
Time & Orbit
Eccentricity (e): 0.156
Orbit Range: 4.16 AU - 5.7 AU
Year: 4039 Days
Day: 12.6 Hours
Environment
Temp: -130 °C
Axial Tilt: 2.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (80)
Outer Limit: 66,321,969 km
- M1: 197,918 km (0.091 R)
- M2: 285,433 km (0.032 R)
- M3: 467,643 km (0.118 R)
- M4: 681,867 km (0.073 R)
- M5: 1,096,852 km (0.095 R)
- M6: 2,098,709 km (0.092 R)
- M7: 2,340,010 km (0.097 R)
- M8: 2,464,027 km (0.118 R)
- M9: 2,682,140 km (0.084 R)
- M10: 2,793,441 km (0.072 R)
- M11: 2,868,689 km (0.115 R)
- M12: 3,555,193 km (0.097 R)
- M13: 3,719,302 km (0.117 R)
- M14: 3,948,935 km (0.078 R)
- M15: 4,183,205 km (0.033 R)
- M16: 4,444,254 km (0.083 R)
- M17: 4,913,692 km (0.053 R)
- M18: 5,004,946 km (0.052 R)
- M19: 5,119,838 km (0.085 R)
- M20: 5,282,151 km (0.088 R)
- M21: 5,540,656 km (0.099 R)
- M22: 5,611,865 km (0.079 R)
- M23: 6,192,903 km (0.1 R)
- M24: 6,390,971 km (0.093 R)
- M25: 6,717,094 km (0.095 R)
- M26: 7,229,616 km (0.092 R)
- M27: 7,307,557 km (0.118 R)
- M28: 8,183,901 km (0.062 R)
- M29: 8,374,040 km (0.116 R)
- M30: 8,814,157 km (0.116 R)
- M31: 9,093,157 km (0.065 R)
- M32: 9,233,779 km (0.119 R)
- M33: 9,403,423 km (0.075 R)
- M34: 9,574,114 km (0.109 R)
- M35: 9,717,130 km (0.114 R)
- M36: 9,832,021 km (0.117 R)
- M37: 10,238,029 km (0.077 R)
- M38: 10,501,771 km (0.093 R)
- M39: 11,066,203 km (0.096 R)
- M40: 11,156,261 km (0.053 R)
- M41: 11,458,150 km (0.057 R)
- M42: 12,039,038 km (0.059 R)
- M43: 12,379,822 km (0.059 R)
- M44: 12,755,163 km (0.106 R)
- M45: 12,944,255 km (0.116 R)
- M46: 13,102,679 km (0.095 R)
- M47: 13,197,973 km (0.115 R)
- M48: 13,485,201 km (0.089 R)
- M49: 14,588,934 km (0.117 R)
- M50: 15,151,721 km (0.072 R)
- M51: 15,251,802 km (0.103 R)
- M52: 16,813,305 km (0.115 R)
- M53: 17,298,750 km (0.071 R)
- M54: 17,894,299 km (0.099 R)
- M55: 18,070,675 km (0.103 R)
- M56: 18,389,767 km (0.102 R)
- M57: 18,532,184 km (0.067 R)
- M58: 18,746,408 km (0.082 R)
- M59: 18,925,627 km (0.079 R)
- M60: 18,997,583 km (0.109 R)
- M61: 19,213,603 km (0.108 R)
- M62: 19,430,519 km (0.104 R)
- M63: 19,903,249 km (0.098 R)
- M64: 19,976,252 km (0.1 R)
- M65: 20,049,406 km (0.093 R)
- M66: 20,306,265 km (0.096 R)
- M67: 20,379,868 km (0.086 R)
- M68: 21,643,970 km (0.084 R)
- M69: 21,869,563 km (0.081 R)
- M70: 22,513,432 km (0.105 R)
- M71: 23,009,948 km (0.041 R)
- M72: 23,086,691 km (0.074 R)
- M73: 24,013,749 km (0.108 R)
- M74: 24,169,481 km (0.092 R)
- M75: 24,247,421 km (0.098 R)
- M76: 24,325,511 km (0.068 R)
- M77: 25,308,369 km (0.112 R)
- M78: 25,984,253 km (0.056 R)
- M79: 26,706,212 km (0.083 R)
- M80: 27,110,126 km (0.114 R)
Planet 5 - Gas Giant
Semi-Major Axis: 9.56 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 358.2
Radius: 13.3
Gravity: 2.02 G
Time & Orbit
Eccentricity (e): 0.106
Orbit Range: 8.55 AU - 10.57 AU
Year: 10906 Days
Day: 10.8 Hours
Environment
Temp: -168 °C
Axial Tilt: 4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (76)
Outer Limit: 66,321,969 km
- M1: 316,848 km (0.087 R)
- M2: 554,410 km (0.062 R)
- M3: 720,015 km (0.083 R)
- M4: 1,019,210 km (0.111 R)
- M5: 1,229,246 km (0.11 R)
- M6: 1,434,793 km (0.095 R)
- M7: 1,966,314 km (0.108 R)
- M8: 2,119,652 km (0.08 R)
- M9: 2,231,851 km (0.042 R)
- M10: 2,369,032 km (0.119 R)
- M11: 2,509,205 km (0.097 R)
- M12: 2,773,395 km (0.079 R)
- M13: 3,097,574 km (0.12 R)
- M14: 3,251,510 km (0.109 R)
- M15: 3,407,989 km (0.101 R)
- M16: 3,782,881 km (0.067 R)
- M17: 4,199,511 km (0.118 R)
- M18: 4,485,543 km (0.078 R)
- M19: 4,807,627 km (0.106 R)
- M20: 4,956,626 km (0.065 R)
- M21: 5,320,448 km (0.087 R)
- M22: 5,443,567 km (0.068 R)
- M23: 5,599,000 km (0.117 R)
- M24: 5,914,202 km (0.061 R)
- M25: 6,074,122 km (0.076 R)
- M26: 6,267,852 km (0.095 R)
- M27: 6,365,389 km (0.075 R)
- M28: 6,727,865 km (0.1 R)
- M29: 6,928,326 km (0.118 R)
- M30: 7,097,073 km (0.084 R)
- M31: 7,198,949 km (0.114 R)
- M32: 7,404,047 km (0.106 R)
- M33: 8,930,843 km (0.099 R)
- M34: 9,523,251 km (0.074 R)
- M35: 9,748,695 km (0.097 R)
- M36: 9,937,936 km (0.056 R)
- M37: 10,474,394 km (0.12 R)
- M38: 12,058,785 km (0.093 R)
- M39: 14,228,403 km (0.098 R)
- M40: 14,746,012 km (0.047 R)
- M41: 14,876,311 km (0.071 R)
- M42: 15,007,060 km (0.031 R)
- M43: 15,888,640 km (0.105 R)
- M44: 16,470,726 km (0.073 R)
- M45: 17,379,832 km (0.068 R)
- M46: 17,517,611 km (0.118 R)
- M47: 17,747,992 km (0.107 R)
- M48: 17,933,045 km (0.101 R)
- M49: 18,025,795 km (0.046 R)
- M50: 18,165,370 km (0.054 R)
- M51: 18,962,428 km (0.089 R)
- M52: 20,107,300 km (0.073 R)
- M53: 21,176,327 km (0.107 R)
- M54: 21,274,463 km (0.101 R)
- M55: 21,618,987 km (0.083 R)
- M56: 21,866,272 km (0.112 R)
- M57: 25,321,085 km (0.116 R)
- M58: 25,738,613 km (0.116 R)
- M59: 25,843,331 km (0.071 R)
- M60: 25,948,199 km (0.052 R)
- M61: 26,211,043 km (0.056 R)
- M62: 27,484,869 km (0.112 R)
- M63: 28,345,206 km (0.1 R)
- M64: 28,724,437 km (0.118 R)
- M65: 29,050,859 km (0.111 R)
- M66: 29,762,197 km (0.075 R)
- M67: 30,590,221 km (0.104 R)
- M68: 32,043,266 km (0.032 R)
- M69: 34,437,879 km (0.111 R)
- M70: 34,784,646 km (0.097 R)
- M71: 36,594,631 km (0.058 R)
- M72: 37,066,762 km (0.097 R)
- M73: 39,941,435 km (0.084 R)
- M74: 40,366,592 km (0.077 R)
- M75: 40,549,251 km (0.069 R)
- M76: 40,793,245 km (0.079 R)
Planet 6 - Ice Giant
Semi-Major Axis: 13.11 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 579.3
Radius: 7.1
Gravity: 11.49 G
Time & Orbit
Eccentricity (e): 0.2
Orbit Range: 10.49 AU - 15.73 AU
Year: 17514 Days
Day: 18.3 Hours
Environment
Temp: -182 °C
Axial Tilt: 25.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (89)
Outer Limit: 66,321,969 km
- M1: 111,600 km (0.038 R)
- M2: 185,801 km (0.109 R)
- M3: 247,136 km (0.102 R)
- M4: 302,936 km (0.06 R)
- M5: 594,801 km (0.039 R)
- M6: 1,103,733 km (0.053 R)
- M7: 1,153,250 km (0.072 R)
- M8: 1,632,711 km (0.083 R)
- M9: 2,358,111 km (0.092 R)
- M10: 2,960,243 km (0.078 R)
- M11: 3,607,702 km (0.1 R)
- M12: 4,024,482 km (0.046 R)
- M13: 4,219,109 km (0.068 R)
- M14: 5,195,085 km (0.078 R)
- M15: 5,321,944 km (0.103 R)
- M16: 5,664,972 km (0.03 R)
- M17: 6,059,611 km (0.057 R)
- M18: 7,061,169 km (0.103 R)
- M19: 7,201,791 km (0.047 R)
- M20: 7,438,156 km (0.106 R)
- M21: 8,359,230 km (0.046 R)
- M22: 10,095,463 km (0.06 R)
- M23: 10,895,811 km (0.05 R)
- M24: 11,716,356 km (0.085 R)
- M25: 11,938,508 km (0.111 R)
- M26: 13,012,920 km (0.084 R)
- M27: 13,532,623 km (0.051 R)
- M28: 15,313,137 km (0.051 R)
- M29: 15,434,461 km (0.091 R)
- M30: 15,739,192 km (0.062 R)
- M31: 16,292,704 km (0.076 R)
- M32: 16,665,203 km (0.112 R)
- M33: 17,355,298 km (0.048 R)
- M34: 17,608,717 km (0.113 R)
- M35: 18,828,538 km (0.04 R)
- M36: 20,075,436 km (0.062 R)
- M37: 21,620,183 km (0.12 R)
- M38: 21,756,318 km (0.113 R)
- M39: 22,303,696 km (0.083 R)
- M40: 23,551,941 km (0.1 R)
- M41: 24,184,441 km (0.074 R)
- M42: 24,396,570 km (0.041 R)
- M43: 26,989,401 km (0.111 R)
- M44: 27,651,222 km (0.099 R)
- M45: 30,047,181 km (0.118 R)
- M46: 30,199,023 km (0.113 R)
- M47: 30,962,720 km (0.066 R)
- M48: 31,655,358 km (0.036 R)
- M49: 31,809,893 km (0.115 R)
- M50: 32,042,368 km (0.118 R)
- M51: 32,119,860 km (0.059 R)
- M52: 33,684,803 km (0.041 R)
- M53: 34,397,038 km (0.079 R)
- M54: 34,954,440 km (0.075 R)
- M55: 35,034,325 km (0.058 R)
- M56: 36,320,717 km (0.104 R)
- M57: 36,644,597 km (0.086 R)
- M58: 38,608,667 km (0.106 R)
- M59: 39,520,167 km (0.118 R)
- M60: 40,271,148 km (0.103 R)
- M61: 41,111,290 km (0.052 R)
- M62: 41,279,887 km (0.107 R)
- M63: 42,126,910 km (0.098 R)
- M64: 43,924,179 km (0.096 R)
- M65: 44,010,347 km (0.041 R)
- M66: 45,223,137 km (0.053 R)
- M67: 45,310,203 km (0.119 R)
- M68: 45,571,700 km (0.027 R)
- M69: 46,622,625 km (0.106 R)
- M70: 47,062,892 km (0.052 R)
- M71: 50,273,112 km (0.111 R)
- M72: 50,724,599 km (0.107 R)
- M73: 51,177,282 km (0.08 R)
- M74: 51,995,732 km (0.076 R)
- M75: 52,360,900 km (0.11 R)
- M76: 52,818,371 km (0.111 R)
- M77: 53,829,802 km (0.097 R)
- M78: 55,684,965 km (0.101 R)
- M79: 57,561,072 km (0.079 R)
- M80: 58,222,594 km (0.098 R)
- M81: 59,076,798 km (0.104 R)
- M82: 60,317,861 km (0.075 R)
- M83: 60,893,664 km (0.104 R)
- M84: 61,567,602 km (0.034 R)
- M85: 62,631,841 km (0.081 R)
- M86: 62,923,108 km (0.103 R)
- M87: 65,171,116 km (0.057 R)
- M88: 65,663,293 km (0.064 R)
- M89: 65,860,612 km (0.099 R)
Planet 7 - Ice Giant
Semi-Major Axis: 13.56 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 534.6
Radius: 4.8
Gravity: 23.2 G
Time & Orbit
Eccentricity (e): 0.139
Orbit Range: 11.68 AU - 15.44 AU
Year: 18423 Days
Day: 17.8 Hours
Environment
Temp: -195 °C
Axial Tilt: 14.5 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (96)
Outer Limit: 66,321,969 km
- M1: 337,493 km (0.074 R)
- M2: 914,342 km (0.081 R)
- M3: 961,466 km (0.094 R)
- M4: 1,157,738 km (0.102 R)
- M5: 1,234,631 km (0.057 R)
- M6: 1,339,799 km (0.111 R)
- M7: 1,503,159 km (0.093 R)
- M8: 1,644,230 km (0.062 R)
- M9: 1,969,306 km (0.101 R)
- M10: 3,165,491 km (0.045 R)
- M11: 3,310,002 km (0.07 R)
- M12: 3,456,608 km (0.11 R)
- M13: 3,530,659 km (0.102 R)
- M14: 4,300,490 km (0.116 R)
- M15: 4,581,734 km (0.116 R)
- M16: 4,745,244 km (0.11 R)
- M17: 4,869,111 km (0.097 R)
- M18: 5,204,510 km (0.103 R)
- M19: 5,332,267 km (0.115 R)
- M20: 5,504,154 km (0.1 R)
- M21: 6,075,469 km (0.114 R)
- M22: 6,619,407 km (0.054 R)
- M23: 7,656,569 km (0.115 R)
- M24: 7,948,135 km (0.087 R)
- M25: 7,997,053 km (0.112 R)
- M26: 8,095,190 km (0.096 R)
- M27: 9,098,991 km (0.086 R)
- M28: 9,615,403 km (0.092 R)
- M29: 10,407,823 km (0.061 R)
- M30: 10,515,085 km (0.083 R)
- M31: 11,607,448 km (0.114 R)
- M32: 11,886,149 km (0.103 R)
- M33: 12,223,492 km (0.093 R)
- M34: 12,280,040 km (0.109 R)
- M35: 12,506,980 km (0.102 R)
- M36: 13,254,371 km (0.072 R)
- M37: 13,545,638 km (0.098 R)
- M38: 14,491,845 km (0.062 R)
- M39: 14,791,789 km (0.094 R)
- M40: 15,215,300 km (0.083 R)
- M41: 16,634,685 km (0.05 R)
- M42: 16,697,366 km (0.099 R)
- M43: 17,774,621 km (0.1 R)
- M44: 18,160,134 km (0.08 R)
- M45: 18,483,565 km (0.117 R)
- M46: 18,808,940 km (0.12 R)
- M47: 18,874,165 km (0.058 R)
- M48: 19,399,253 km (0.03 R)
- M49: 21,206,396 km (0.051 R)
- M50: 22,371,464 km (0.12 R)
- M51: 22,579,255 km (0.063 R)
- M52: 23,206,370 km (0.057 R)
- M53: 23,276,381 km (0.064 R)
- M54: 24,620,369 km (0.048 R)
- M55: 24,763,384 km (0.102 R)
- M56: 25,265,734 km (0.072 R)
- M57: 28,500,040 km (0.102 R)
- M58: 29,026,475 km (0.072 R)
- M59: 29,936,329 km (0.104 R)
- M60: 31,241,421 km (0.098 R)
- M61: 32,643,303 km (0.094 R)
- M62: 33,193,972 km (0.115 R)
- M63: 33,430,935 km (0.057 R)
- M64: 34,464,208 km (0.052 R)
- M65: 34,864,382 km (0.066 R)
- M66: 36,074,180 km (0.094 R)
- M67: 36,643,550 km (0.104 R)
- M68: 37,626,258 km (0.081 R)
- M69: 39,869,179 km (0.101 R)
- M70: 39,953,103 km (0.064 R)
- M71: 40,879,862 km (0.106 R)
- M72: 41,049,057 km (0.112 R)
- M73: 41,218,552 km (0.077 R)
- M74: 41,473,167 km (0.066 R)
- M75: 41,898,923 km (0.108 R)
- M76: 42,754,473 km (0.113 R)
- M77: 43,529,390 km (0.053 R)
- M78: 43,615,858 km (0.051 R)
- M79: 45,005,771 km (0.116 R)
- M80: 45,180,651 km (0.09 R)
- M81: 45,969,930 km (0.07 R)
- M82: 46,233,970 km (0.117 R)
- M83: 49,442,246 km (0.086 R)
- M84: 50,164,953 km (0.104 R)
- M85: 50,618,384 km (0.107 R)
- M86: 52,353,869 km (0.117 R)
- M87: 54,015,902 km (0.111 R)
- M88: 56,635,360 km (0.059 R)
- M89: 57,012,945 km (0.078 R)
- M90: 61,318,073 km (0.102 R)
- M91: 62,971,428 km (0.1 R)
- M92: 63,264,790 km (0.064 R)
- M93: 64,245,703 km (0.115 R)
- M94: 64,541,009 km (0.111 R)
- M95: 65,132,819 km (0.111 R)
- M96: 65,627,389 km (0.074 R)
Kuiper Belt
Range: 30 - 48 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 380 - 15,548 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.