Star System Generated (Seed: 1766571754)
Star Details
Spectral Class: M6V
Temperature: 2,833 K
Mass: 0.29 sol
Luminosity: 0.01 lux
Habitable Zone (HZ)
Inner Boundary: 0.1 AU
Outer Boundary: 0.14 AU
Physical Limits
Snow Line: 0.48 AU
Max System Radius: 10.8 AU
Planetary System (8 Planets)
Planet 1 - Gas Giant
Semi-Major Axis: 0.54 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 554.7
Radius: 14.5
Gravity: 2.64 G
Time & Orbit
Eccentricity (e): 0.025
Orbit Range: 0.53 AU - 0.55 AU
Year: 269 Days
Day: 14.7 Hours
Environment
Temp: -138 °C
Axial Tilt: 43.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (29)
Outer Limit: 41,220,447 km
- M1: 181,612 km (0.1 R)
- M2: 285,582 km (0.116 R)
- M3: 396,285 km (0.111 R)
- M4: 510,278 km (0.086 R)
- M5: 706,102 km (0.069 R)
- M6: 838,496 km (0.076 R)
- M7: 946,805 km (0.086 R)
- M8: 1,049,728 km (0.119 R)
- M9: 1,153,400 km (0.082 R)
- M10: 1,245,851 km (0.077 R)
- M11: 1,588,430 km (0.074 R)
- M12: 1,688,362 km (0.032 R)
- M13: 1,782,010 km (0.07 R)
- M14: 1,899,295 km (0.115 R)
- M15: 1,997,132 km (0.063 R)
- M16: 2,137,754 km (0.105 R)
- M17: 2,230,355 km (0.109 R)
- M18: 2,362,450 km (0.086 R)
- M19: 2,453,555 km (0.046 R)
- M20: 2,555,730 km (0.077 R)
- M21: 2,709,367 km (0.073 R)
- M22: 2,855,823 km (0.101 R)
- M23: 2,999,886 km (0.102 R)
- M24: 3,099,069 km (0.04 R)
- M25: 3,257,942 km (0.113 R)
- M26: 3,501,488 km (0.113 R)
- M27: 3,695,067 km (0.067 R)
- M28: 3,813,100 km (0.117 R)
- M29: 3,915,126 km (0.119 R)
Planet 2 - Gas Giant
Semi-Major Axis: 0.62 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 192.5
Radius: 12.2
Gravity: 1.29 G
Time & Orbit
Eccentricity (e): 0.229
Orbit Range: 0.48 AU - 0.76 AU
Year: 331 Days
Day: 12.9 Hours
Environment
Temp: -147 °C
Axial Tilt: 7.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (27)
Outer Limit: 41,220,447 km
- M1: 152,291 km (0.101 R)
- M2: 288,125 km (0.11 R)
- M3: 368,011 km (0.07 R)
- M4: 489,933 km (0.094 R)
- M5: 648,656 km (0.091 R)
- M6: 752,776 km (0.087 R)
- M7: 829,371 km (0.096 R)
- M8: 917,783 km (0.106 R)
- M9: 1,095,655 km (0.101 R)
- M10: 1,174,642 km (0.112 R)
- M11: 1,252,583 km (0.076 R)
- M12: 1,342,342 km (0.094 R)
- M13: 1,427,612 km (0.112 R)
- M14: 1,532,331 km (0.114 R)
- M15: 1,750,145 km (0.08 R)
- M16: 1,847,833 km (0.081 R)
- M17: 1,928,017 km (0.119 R)
- M18: 2,147,926 km (0.098 R)
- M19: 2,293,784 km (0.093 R)
- M20: 2,401,195 km (0.108 R)
- M21: 2,506,213 km (0.066 R)
- M22: 2,634,119 km (0.09 R)
- M23: 2,725,075 km (0.105 R)
- M24: 2,861,358 km (0.064 R)
- M25: 3,031,451 km (0.117 R)
- M26: 3,108,793 km (0.095 R)
- M27: 3,214,260 km (0.088 R)
Planet 3 - Gas Giant
Semi-Major Axis: 0.63 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 124.2
Radius: 8.6
Gravity: 1.68 G
Time & Orbit
Eccentricity (e): 0.158
Orbit Range: 0.53 AU - 0.73 AU
Year: 339 Days
Day: 8.1 Hours
Environment
Temp: -153 °C
Axial Tilt: 44.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (32)
Outer Limit: 41,220,447 km
- M1: 107,112 km (0.078 R)
- M2: 164,258 km (0.034 R)
- M3: 219,310 km (0.113 R)
- M4: 290,369 km (0.107 R)
- M5: 346,169 km (0.106 R)
- M6: 408,701 km (0.081 R)
- M7: 482,304 km (0.084 R)
- M8: 536,458 km (0.051 R)
- M9: 778,358 km (0.069 R)
- M10: 870,211 km (0.094 R)
- M11: 996,920 km (0.077 R)
- M12: 1,106,276 km (0.114 R)
- M13: 1,177,485 km (0.087 R)
- M14: 1,247,197 km (0.119 R)
- M15: 1,352,963 km (0.106 R)
- M16: 1,442,423 km (0.091 R)
- M17: 1,533,977 km (0.062 R)
- M18: 1,620,743 km (0.08 R)
- M19: 1,712,596 km (0.103 R)
- M20: 1,830,779 km (0.11 R)
- M21: 1,887,327 km (0.043 R)
- M22: 1,976,936 km (0.085 R)
- M23: 2,049,790 km (0.116 R)
- M24: 2,119,652 km (0.115 R)
- M25: 2,213,001 km (0.094 R)
- M26: 2,326,845 km (0.104 R)
- M27: 2,419,297 km (0.117 R)
- M28: 2,473,900 km (0.118 R)
- M29: 2,544,660 km (0.093 R)
- M30: 2,608,089 km (0.102 R)
- M31: 2,708,320 km (0.106 R)
- M32: 2,765,017 km (0.094 R)
Planet 4 - Gas Giant
Semi-Major Axis: 0.64 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 601.9
Radius: 12
Gravity: 4.18 G
Time & Orbit
Eccentricity (e): 0.166
Orbit Range: 0.53 AU - 0.75 AU
Year: 347 Days
Day: 12.7 Hours
Environment
Temp: -159 °C
Axial Tilt: 32.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (36)
Outer Limit: 41,220,447 km
- M1: 149,448 km (0.1 R)
- M2: 227,688 km (0.074 R)
- M3: 322,084 km (0.042 R)
- M4: 469,588 km (0.103 R)
- M5: 572,960 km (0.043 R)
- M6: 702,811 km (0.066 R)
- M7: 780,901 km (0.066 R)
- M8: 904,469 km (0.113 R)
- M9: 990,787 km (0.082 R)
- M10: 1,272,180 km (0.107 R)
- M11: 1,598,453 km (0.076 R)
- M12: 1,690,306 km (0.117 R)
- M13: 1,779,167 km (0.083 R)
- M14: 1,864,588 km (0.059 R)
- M15: 1,946,268 km (0.027 R)
- M16: 2,145,233 km (0.111 R)
- M17: 2,318,019 km (0.103 R)
- M18: 2,434,107 km (0.082 R)
- M19: 2,540,770 km (0.035 R)
- M20: 2,689,471 km (0.116 R)
- M21: 2,799,874 km (0.108 R)
- M22: 2,911,923 km (0.11 R)
- M23: 2,995,398 km (0.052 R)
- M24: 3,177,160 km (0.09 R)
- M25: 3,275,745 km (0.068 R)
- M26: 3,667,093 km (0.029 R)
- M27: 3,796,495 km (0.044 R)
- M28: 3,901,213 km (0.04 R)
- M29: 4,086,864 km (0.074 R)
- M30: 4,167,198 km (0.081 R)
- M31: 4,322,930 km (0.112 R)
- M32: 4,446,198 km (0.084 R)
- M33: 4,522,044 km (0.041 R)
- M34: 4,598,339 km (0.117 R)
- M35: 4,689,145 km (0.1 R)
- M36: 4,830,066 km (0.111 R)
Planet 5 - Gas Giant
Semi-Major Axis: 1.23 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 565.5
Radius: 10.2
Gravity: 5.44 G
Time & Orbit
Eccentricity (e): 0.184
Orbit Range: 1 AU - 1.46 AU
Year: 925 Days
Day: 13.2 Hours
Environment
Temp: -190 °C
Axial Tilt: 46.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (62)
Outer Limit: 41,220,447 km
- M1: 137,331 km (0.094 R)
- M2: 228,286 km (0.12 R)
- M3: 332,107 km (0.073 R)
- M4: 494,571 km (0.07 R)
- M5: 612,304 km (0.107 R)
- M6: 825,331 km (0.11 R)
- M7: 908,059 km (0.118 R)
- M8: 975,079 km (0.114 R)
- M9: 1,186,760 km (0.117 R)
- M10: 1,478,177 km (0.097 R)
- M11: 1,602,642 km (0.095 R)
- M12: 1,685,070 km (0.088 R)
- M13: 1,753,586 km (0.118 R)
- M14: 2,013,288 km (0.103 R)
- M15: 2,193,404 km (0.106 R)
- M16: 2,302,311 km (0.088 R)
- M17: 2,413,163 km (0.119 R)
- M18: 2,587,295 km (0.088 R)
- M19: 2,702,635 km (0.067 R)
- M20: 2,810,645 km (0.107 R)
- M21: 2,984,777 km (0.108 R)
- M22: 3,096,676 km (0.105 R)
- M23: 3,181,498 km (0.083 R)
- M24: 3,391,982 km (0.099 R)
- M25: 3,837,185 km (0.101 R)
- M26: 3,948,785 km (0.108 R)
- M27: 4,164,954 km (0.065 R)
- M28: 4,237,958 km (0.042 R)
- M29: 4,332,354 km (0.087 R)
- M30: 4,395,784 km (0.108 R)
- M31: 4,469,984 km (0.101 R)
- M32: 4,534,012 km (0.094 R)
- M33: 4,598,489 km (0.112 R)
- M34: 4,663,115 km (0.106 R)
- M35: 4,804,186 km (0.076 R)
- M36: 4,935,683 km (0.08 R)
- M37: 5,001,954 km (0.097 R)
- M38: 5,068,525 km (0.111 R)
- M39: 5,135,396 km (0.044 R)
- M40: 5,247,295 km (0.049 R)
- M41: 5,462,566 km (0.076 R)
- M42: 5,553,971 km (0.119 R)
- M43: 5,622,935 km (0.117 R)
- M44: 5,773,281 km (0.041 R)
- M45: 5,866,480 km (0.109 R)
- M46: 5,936,642 km (0.075 R)
- M47: 6,220,429 km (0.094 R)
- M48: 6,364,043 km (0.057 R)
- M49: 6,472,501 km (0.092 R)
- M50: 6,569,291 km (0.072 R)
- M51: 6,666,680 km (0.101 R)
- M52: 6,739,982 km (0.102 R)
- M53: 7,061,019 km (0.096 R)
- M54: 7,298,731 km (0.093 R)
- M55: 7,475,555 km (0.109 R)
- M56: 7,539,134 km (0.038 R)
- M57: 7,653,876 km (0.051 R)
- M58: 7,833,543 km (0.065 R)
- M59: 7,936,915 km (0.05 R)
- M60: 8,040,736 km (0.102 R)
- M61: 8,184,200 km (0.045 R)
- M62: 9,076,252 km (0.084 R)
Planet 6 - Gas Giant
Semi-Major Axis: 2.9 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 697.2
Radius: 12.3
Gravity: 4.61 G
Time & Orbit
Eccentricity (e): 0.201
Orbit Range: 2.32 AU - 3.48 AU
Year: 3350 Days
Day: 5.1 Hours
Environment
Temp: -211 °C
Axial Tilt: 36.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (80)
Outer Limit: 41,220,447 km
- M1: 153,637 km (0.112 R)
- M2: 291,417 km (0.114 R)
- M3: 380,876 km (0.07 R)
- M4: 459,116 km (0.086 R)
- M5: 627,413 km (0.116 R)
- M6: 766,390 km (0.101 R)
- M7: 1,363,136 km (0.086 R)
- M8: 1,468,303 km (0.051 R)
- M9: 1,603,839 km (0.088 R)
- M10: 1,701,377 km (0.116 R)
- M11: 1,858,754 km (0.07 R)
- M12: 1,946,717 km (0.084 R)
- M13: 2,203,726 km (0.106 R)
- M14: 2,536,881 km (0.112 R)
- M15: 2,835,328 km (0.108 R)
- M16: 2,988,816 km (0.12 R)
- M17: 3,162,798 km (0.117 R)
- M18: 3,286,665 km (0.103 R)
- M19: 3,667,841 km (0.095 R)
- M20: 3,779,441 km (0.084 R)
- M21: 3,987,082 km (0.112 R)
- M22: 4,198,464 km (0.102 R)
- M23: 4,692,586 km (0.031 R)
- M24: 5,163,819 km (0.112 R)
- M25: 6,151,464 km (0.11 R)
- M26: 6,262,316 km (0.065 R)
- M27: 6,553,733 km (0.075 R)
- M28: 6,689,718 km (0.074 R)
- M29: 6,918,602 km (0.11 R)
- M30: 7,126,693 km (0.092 R)
- M31: 7,337,028 km (0.093 R)
- M32: 8,101,173 km (0.028 R)
- M33: 8,247,331 km (0.051 R)
- M34: 8,369,851 km (0.057 R)
- M35: 8,890,751 km (0.119 R)
- M36: 9,041,546 km (0.117 R)
- M37: 9,243,952 km (0.117 R)
- M38: 9,653,251 km (0.103 R)
- M39: 10,042,355 km (0.118 R)
- M40: 10,252,092 km (0.117 R)
- M41: 10,383,887 km (0.109 R)
- M42: 10,542,760 km (0.113 R)
- M43: 10,702,381 km (0.072 R)
- M44: 10,782,566 km (0.091 R)
- M45: 10,997,388 km (0.075 R)
- M46: 11,240,634 km (0.12 R)
- M47: 11,322,165 km (0.085 R)
- M48: 11,787,564 km (0.078 R)
- M49: 12,064,470 km (0.063 R)
- M50: 12,231,571 km (0.061 R)
- M51: 12,343,320 km (0.105 R)
- M52: 12,511,768 km (0.083 R)
- M53: 12,964,600 km (0.094 R)
- M54: 13,078,594 km (0.038 R)
- M55: 13,164,463 km (0.116 R)
- M56: 13,279,055 km (0.105 R)
- M57: 13,422,819 km (0.049 R)
- M58: 13,828,079 km (0.094 R)
- M59: 14,650,867 km (0.114 R)
- M60: 15,038,176 km (0.051 R)
- M61: 15,459,145 km (0.048 R)
- M62: 16,128,595 km (0.109 R)
- M63: 16,683,304 km (0.097 R)
- M64: 16,931,936 km (0.107 R)
- M65: 17,401,374 km (0.114 R)
- M66: 18,289,088 km (0.112 R)
- M67: 18,449,157 km (0.117 R)
- M68: 18,706,167 km (0.091 R)
- M69: 18,835,120 km (0.052 R)
- M70: 19,061,611 km (0.095 R)
- M71: 19,321,463 km (0.075 R)
- M72: 19,713,559 km (0.078 R)
- M73: 20,406,047 km (0.089 R)
- M74: 20,538,890 km (0.077 R)
- M75: 21,039,445 km (0.049 R)
- M76: 21,274,463 km (0.098 R)
- M77: 21,713,233 km (0.104 R)
- M78: 22,154,996 km (0.043 R)
- M79: 22,428,311 km (0.11 R)
- M80: 23,047,347 km (0.114 R)
Planet 7 - Gas Giant
Semi-Major Axis: 3.03 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 76.5
Radius: 11.7
Gravity: 0.56 G
Time & Orbit
Eccentricity (e): 0.167
Orbit Range: 2.52 AU - 3.54 AU
Year: 3577 Days
Day: 14.8 Hours
Environment
Temp: -222 °C
Axial Tilt: 7.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (49)
Outer Limit: 41,220,447 km
- M1: 146,456 km (0.096 R)
- M2: 251,474 km (0.117 R)
- M3: 430,094 km (0.092 R)
- M4: 599,289 km (0.049 R)
- M5: 839,693 km (0.096 R)
- M6: 1,096,852 km (0.063 R)
- M7: 1,274,723 km (0.062 R)
- M8: 1,387,819 km (0.118 R)
- M9: 1,607,280 km (0.111 R)
- M10: 1,748,051 km (0.116 R)
- M11: 1,856,510 km (0.093 R)
- M12: 2,176,200 km (0.062 R)
- M13: 2,263,865 km (0.12 R)
- M14: 2,442,933 km (0.119 R)
- M15: 2,524,015 km (0.101 R)
- M16: 2,688,872 km (0.052 R)
- M17: 2,772,797 km (0.094 R)
- M18: 2,900,254 km (0.096 R)
- M19: 3,260,934 km (0.09 R)
- M20: 3,636,126 km (0.057 R)
- M21: 3,917,819 km (0.103 R)
- M22: 4,037,347 km (0.073 R)
- M23: 4,121,721 km (0.091 R)
- M24: 4,403,114 km (0.117 R)
- M25: 4,640,376 km (0.097 R)
- M26: 4,856,396 km (0.061 R)
- M27: 5,010,781 km (0.12 R)
- M28: 5,510,737 km (0.085 R)
- M29: 5,889,369 km (0.073 R)
- M30: 6,515,586 km (0.095 R)
- M31: 6,872,825 km (0.078 R)
- M32: 7,133,874 km (0.114 R)
- M33: 7,472,414 km (0.067 R)
- M34: 7,982,393 km (0.053 R)
- M35: 8,241,646 km (0.082 R)
- M36: 8,472,775 km (0.087 R)
- M37: 8,674,881 km (0.079 R)
- M38: 8,815,653 km (0.098 R)
- M39: 9,178,877 km (0.105 R)
- M40: 9,290,477 km (0.106 R)
- M41: 9,531,030 km (0.09 R)
- M42: 9,903,977 km (0.067 R)
- M43: 9,985,658 km (0.042 R)
- M44: 10,265,256 km (0.113 R)
- M45: 10,414,256 km (0.11 R)
- M46: 10,530,643 km (0.119 R)
- M47: 11,136,065 km (0.098 R)
- M48: 11,255,145 km (0.111 R)
- M49: 11,546,113 km (0.098 R)
Planet 8 - Ice Giant
Semi-Major Axis: 6.61 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 327.9
Radius: 5
Gravity: 13.12 G
Time & Orbit
Eccentricity (e): 0.084
Orbit Range: 6.05 AU - 7.17 AU
Year: 11526 Days
Day: 15.3 Hours
Environment
Temp: -220 °C
Axial Tilt: 97.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (89)
Outer Limit: 41,220,447 km
- M1: 91,703 km (0.116 R)
- M2: 308,920 km (0.062 R)
- M3: 343,327 km (0.097 R)
- M4: 712,983 km (0.054 R)
- M5: 907,610 km (0.068 R)
- M6: 1,155,045 km (0.105 R)
- M7: 1,584,241 km (0.112 R)
- M8: 2,103,795 km (0.107 R)
- M9: 2,218,237 km (0.072 R)
- M10: 2,549,597 km (0.117 R)
- M11: 2,721,036 km (0.046 R)
- M12: 2,947,078 km (0.116 R)
- M13: 3,049,553 km (0.045 R)
- M14: 3,101,164 km (0.118 R)
- M15: 3,337,229 km (0.047 R)
- M16: 4,136,680 km (0.089 R)
- M17: 4,280,294 km (0.06 R)
- M18: 4,484,196 km (0.093 R)
- M19: 4,602,079 km (0.117 R)
- M20: 5,053,416 km (0.112 R)
- M21: 5,393,302 km (0.066 R)
- M22: 5,645,076 km (0.107 R)
- M23: 6,095,066 km (0.073 R)
- M24: 6,225,665 km (0.112 R)
- M25: 6,892,871 km (0.12 R)
- M26: 7,304,116 km (0.09 R)
- M27: 7,442,943 km (0.102 R)
- M28: 8,006,927 km (0.089 R)
- M29: 8,657,678 km (0.116 R)
- M30: 8,730,981 km (0.058 R)
- M31: 8,878,334 km (0.101 R)
- M32: 9,063,686 km (0.075 R)
- M33: 9,212,985 km (0.081 R)
- M34: 9,665,369 km (0.097 R)
- M35: 10,202,425 km (0.118 R)
- M36: 10,474,544 km (0.037 R)
- M37: 10,749,056 km (0.064 R)
- M38: 11,425,537 km (0.1 R)
- M39: 11,708,128 km (0.116 R)
- M40: 12,033,802 km (0.088 R)
- M41: 12,944,853 km (0.089 R)
- M42: 13,155,038 km (0.091 R)
- M43: 13,366,420 km (0.063 R)
- M44: 13,451,242 km (0.106 R)
- M45: 13,706,755 km (0.068 R)
- M46: 14,352,719 km (0.097 R)
- M47: 14,832,629 km (0.051 R)
- M48: 15,185,081 km (0.092 R)
- M49: 15,808,306 km (0.086 R)
- M50: 16,213,417 km (0.057 R)
- M51: 17,264,043 km (0.073 R)
- M52: 18,619,849 km (0.111 R)
- M53: 19,430,370 km (0.03 R)
- M54: 19,622,753 km (0.106 R)
- M55: 20,252,410 km (0.095 R)
- M56: 20,301,179 km (0.12 R)
- M57: 20,741,296 km (0.11 R)
- M58: 21,481,955 km (0.118 R)
- M59: 21,830,368 km (0.076 R)
- M60: 21,880,334 km (0.107 R)
- M61: 21,980,415 km (0.103 R)
- M62: 23,141,295 km (0.056 R)
- M63: 23,192,307 km (0.094 R)
- M64: 23,806,407 km (0.117 R)
- M65: 23,909,180 km (0.07 R)
- M66: 24,218,698 km (0.084 R)
- M67: 24,633,384 km (0.114 R)
- M68: 26,688,410 km (0.049 R)
- M69: 28,742,987 km (0.032 R)
- M70: 29,733,774 km (0.1 R)
- M71: 29,789,125 km (0.081 R)
- M72: 29,844,626 km (0.11 R)
- M73: 29,955,478 km (0.074 R)
- M74: 30,066,629 km (0.086 R)
- M75: 30,735,780 km (0.116 R)
- M76: 30,959,878 km (0.112 R)
- M77: 32,430,275 km (0.118 R)
- M78: 32,487,272 km (0.081 R)
- M79: 32,658,412 km (0.049 R)
- M80: 33,173,926 km (0.106 R)
- M81: 33,288,817 km (0.104 R)
- M82: 35,086,685 km (0.114 R)
- M83: 35,438,240 km (0.073 R)
- M84: 35,497,032 km (0.11 R)
- M85: 36,796,887 km (0.053 R)
- M86: 38,172,440 km (0.111 R)
- M87: 38,836,355 km (0.103 R)
- M88: 39,625,783 km (0.083 R)
- M89: 40,053,035 km (0.069 R)
Kuiper Belt
Range: 30 - 49 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 385 - 16,514 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.