Star System Generated (Seed: 1768011107)
Star Details
Spectral Class: M1V
Temperature: 3,483 K
Mass: 0.32 sol
Luminosity: 0.02 lux
Habitable Zone (HZ)
Inner Boundary: 0.13 AU
Outer Boundary: 0.19 AU
Physical Limits
Snow Line: 0.68 AU
Max System Radius: 11.3 AU
Planetary System (6 Planets)
Asteroid Belt
Center: 0.89 AU
Composition
Type: Main (Rocky/Icy Mix)
A dense region of planetesimals and debris.
Boundary
Planet 1 - Gas Giant
Semi-Major Axis: 1.78 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 979.7
Radius: 10.1
Gravity: 9.6 G
Time & Orbit
Eccentricity (e): 0.041
Orbit Range: 1.71 AU - 1.85 AU
Year: 1533 Days
Day: 13.7 Hours
Environment
Temp: -194 °C
Axial Tilt: 12.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (71)
Outer Limit: 74,586,474 km
- M1: 267,182 km (0.115 R)
- M2: 391,797 km (0.038 R)
- M3: 466,297 km (0.093 R)
- M4: 567,874 km (0.104 R)
- M5: 677,828 km (0.096 R)
- M6: 903,721 km (0.074 R)
- M7: 1,220,270 km (0.098 R)
- M8: 1,336,807 km (0.071 R)
- M9: 1,406,519 km (0.04 R)
- M10: 1,763,460 km (0.088 R)
- M11: 1,907,373 km (0.082 R)
- M12: 2,020,918 km (0.116 R)
- M13: 2,125,038 km (0.03 R)
- M14: 2,302,461 km (0.113 R)
- M15: 2,423,635 km (0.065 R)
- M16: 2,509,803 km (0.103 R)
- M17: 2,622,002 km (0.093 R)
- M18: 2,800,023 km (0.106 R)
- M19: 2,916,560 km (0.079 R)
- M20: 3,061,221 km (0.107 R)
- M21: 3,181,348 km (0.081 R)
- M22: 3,677,864 km (0.104 R)
- M23: 3,863,215 km (0.109 R)
- M24: 4,198,614 km (0.086 R)
- M25: 4,573,955 km (0.085 R)
- M26: 4,742,552 km (0.107 R)
- M27: 4,866,568 km (0.093 R)
- M28: 4,944,509 km (0.082 R)
- M29: 5,453,890 km (0.077 R)
- M30: 5,731,244 km (0.067 R)
- M31: 5,863,339 km (0.077 R)
- M32: 5,963,121 km (0.097 R)
- M33: 6,130,670 km (0.119 R)
- M34: 6,265,907 km (0.026 R)
- M35: 7,239,939 km (0.074 R)
- M36: 7,365,002 km (0.077 R)
- M37: 7,726,281 km (0.066 R)
- M38: 7,854,187 km (0.06 R)
- M39: 8,001,093 km (0.115 R)
- M40: 8,391,244 km (0.029 R)
- M41: 8,485,042 km (0.03 R)
- M42: 8,673,834 km (0.091 R)
- M43: 8,768,679 km (0.094 R)
- M44: 9,055,309 km (0.081 R)
- M45: 9,442,468 km (0.099 R)
- M46: 9,835,013 km (0.098 R)
- M47: 10,013,333 km (0.117 R)
- M48: 10,454,049 km (0.085 R)
- M49: 10,534,832 km (0.118 R)
- M50: 10,839,712 km (0.115 R)
- M51: 10,982,877 km (0.085 R)
- M52: 11,230,013 km (0.11 R)
- M53: 11,354,179 km (0.074 R)
- M54: 11,583,064 km (0.088 R)
- M55: 12,066,714 km (0.046 R)
- M56: 12,514,161 km (0.076 R)
- M57: 12,901,919 km (0.071 R)
- M58: 13,032,069 km (0.074 R)
- M59: 13,140,827 km (0.096 R)
- M60: 13,293,716 km (0.061 R)
- M61: 13,689,402 km (0.104 R)
- M62: 13,777,814 km (0.109 R)
- M63: 13,999,818 km (0.045 R)
- M64: 14,088,978 km (0.098 R)
- M65: 14,335,066 km (0.101 R)
- M66: 14,402,385 km (0.115 R)
- M67: 14,469,854 km (0.054 R)
- M68: 14,854,171 km (0.108 R)
- M69: 15,104,598 km (0.119 R)
- M70: 15,173,114 km (0.095 R)
- M71: 15,379,409 km (0.095 R)
Planet 2 - Gas Giant
Semi-Major Axis: 2.35 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 892.7
Radius: 10.2
Gravity: 8.58 G
Time & Orbit
Eccentricity (e): 0.078
Orbit Range: 2.17 AU - 2.53 AU
Year: 2326 Days
Day: 5.1 Hours
Environment
Temp: -188 °C
Axial Tilt: 5.5 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (70)
Outer Limit: 74,586,474 km
- M1: 130,150 km (0.08 R)
- M2: 195,524 km (0.113 R)
- M3: 284,236 km (0.095 R)
- M4: 394,639 km (0.098 R)
- M5: 460,462 km (0.113 R)
- M6: 539,151 km (0.097 R)
- M7: 712,086 km (0.11 R)
- M8: 914,193 km (0.043 R)
- M9: 1,006,794 km (0.099 R)
- M10: 1,091,915 km (0.12 R)
- M11: 1,386,024 km (0.119 R)
- M12: 1,592,021 km (0.085 R)
- M13: 1,808,040 km (0.117 R)
- M14: 1,979,928 km (0.118 R)
- M15: 2,115,763 km (0.094 R)
- M16: 2,283,013 km (0.059 R)
- M17: 2,354,072 km (0.103 R)
- M18: 2,705,328 km (0.113 R)
- M19: 2,871,980 km (0.084 R)
- M20: 2,995,249 km (0.081 R)
- M21: 3,152,027 km (0.067 R)
- M22: 3,263,328 km (0.118 R)
- M23: 3,655,125 km (0.115 R)
- M24: 3,822,824 km (0.116 R)
- M25: 4,062,031 km (0.03 R)
- M26: 4,200,858 km (0.088 R)
- M27: 4,483,448 km (0.055 R)
- M28: 4,717,569 km (0.058 R)
- M29: 4,790,423 km (0.102 R)
- M30: 5,597,504 km (0.097 R)
- M31: 5,791,233 km (0.07 R)
- M32: 6,305,401 km (0.059 R)
- M33: 7,083,160 km (0.103 R)
- M34: 7,462,241 km (0.108 R)
- M35: 7,718,502 km (0.089 R)
- M36: 7,783,128 km (0.112 R)
- M37: 7,956,064 km (0.036 R)
- M38: 8,152,336 km (0.112 R)
- M39: 8,416,376 km (0.11 R)
- M40: 8,817,747 km (0.116 R)
- M41: 9,454,735 km (0.092 R)
- M42: 9,662,526 km (0.084 R)
- M43: 10,177,143 km (0.103 R)
- M44: 10,556,972 km (0.1 R)
- M45: 11,086,848 km (0.094 R)
- M46: 11,208,471 km (0.108 R)
- M47: 11,306,009 km (0.112 R)
- M48: 12,222,595 km (0.106 R)
- M49: 12,398,672 km (0.069 R)
- M50: 12,474,368 km (0.106 R)
- M51: 12,575,646 km (0.109 R)
- M52: 13,343,382 km (0.088 R)
- M53: 13,421,023 km (0.076 R)
- M54: 13,576,755 km (0.116 R)
- M55: 13,942,372 km (0.087 R)
- M56: 14,021,060 km (0.101 R)
- M57: 14,258,323 km (0.119 R)
- M58: 15,085,449 km (0.084 R)
- M59: 15,220,387 km (0.116 R)
- M60: 15,518,535 km (0.091 R)
- M61: 15,682,046 km (0.117 R)
- M62: 15,900,907 km (0.036 R)
- M63: 16,175,868 km (0.113 R)
- M64: 17,010,175 km (0.12 R)
- M65: 17,291,419 km (0.055 R)
- M66: 17,716,128 km (0.095 R)
- M67: 18,058,408 km (0.092 R)
- M68: 18,894,510 km (0.081 R)
- M69: 19,185,777 km (0.072 R)
- M70: 19,654,916 km (0.107 R)
Planet 3 - Gas Giant
Semi-Major Axis: 2.48 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 180.6
Radius: 10.3
Gravity: 1.7 G
Time & Orbit
Eccentricity (e): 0.234
Orbit Range: 1.9 AU - 3.06 AU
Year: 2522 Days
Day: 8.5 Hours
Environment
Temp: -199 °C
Axial Tilt: 26.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (42)
Outer Limit: 74,586,474 km
- M1: 152,590 km (0.102 R)
- M2: 243,994 km (0.101 R)
- M3: 423,661 km (0.034 R)
- M4: 529,427 km (0.116 R)
- M5: 750,383 km (0.111 R)
- M6: 833,410 km (0.03 R)
- M7: 1,117,646 km (0.103 R)
- M8: 1,304,643 km (0.046 R)
- M9: 1,519,914 km (0.083 R)
- M10: 1,672,953 km (0.062 R)
- M11: 1,831,228 km (0.11 R)
- M12: 2,093,024 km (0.107 R)
- M13: 2,274,336 km (0.031 R)
- M14: 2,439,941 km (0.106 R)
- M15: 2,794,189 km (0.113 R)
- M16: 3,005,571 km (0.119 R)
- M17: 3,176,262 km (0.102 R)
- M18: 3,539,186 km (0.081 R)
- M19: 3,756,103 km (0.12 R)
- M20: 3,853,940 km (0.057 R)
- M21: 3,965,092 km (0.096 R)
- M22: 4,355,991 km (0.112 R)
- M23: 4,523,540 km (0.067 R)
- M24: 4,601,631 km (0.108 R)
- M25: 4,693,334 km (0.12 R)
- M26: 4,945,406 km (0.09 R)
- M27: 5,324,936 km (0.115 R)
- M28: 5,407,514 km (0.071 R)
- M29: 5,490,391 km (0.069 R)
- M30: 5,897,597 km (0.118 R)
- M31: 6,402,041 km (0.092 R)
- M32: 6,935,357 km (0.047 R)
- M33: 7,071,043 km (0.081 R)
- M34: 7,268,362 km (0.093 R)
- M35: 7,840,275 km (0.114 R)
- M36: 8,234,914 km (0.119 R)
- M37: 8,555,353 km (0.084 R)
- M38: 9,658,338 km (0.08 R)
- M39: 11,422,246 km (0.086 R)
- M40: 11,815,539 km (0.101 R)
- M41: 12,104,413 km (0.11 R)
- M42: 12,249,672 km (0.107 R)
Planet 4 - Ice Giant
Semi-Major Axis: 8.38 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 56.4
Radius: 7
Gravity: 1.15 G
Time & Orbit
Eccentricity (e): 0.187
Orbit Range: 6.81 AU - 9.95 AU
Year: 15663 Days
Day: 15.1 Hours
Environment
Temp: -226 °C
Axial Tilt: 20.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (53)
Outer Limit: 74,586,474 km
- M1: 100,081 km (0.079 R)
- M2: 191,336 km (0.12 R)
- M3: 270,623 km (0.099 R)
- M4: 488,886 km (0.104 R)
- M5: 1,013,825 km (0.066 R)
- M6: 1,095,954 km (0.051 R)
- M7: 1,524,402 km (0.081 R)
- M8: 1,847,833 km (0.105 R)
- M9: 1,966,165 km (0.063 R)
- M10: 2,823,809 km (0.081 R)
- M11: 3,019,783 km (0.057 R)
- M12: 3,199,898 km (0.055 R)
- M13: 3,570,752 km (0.106 R)
- M14: 3,761,339 km (0.093 R)
- M15: 3,868,601 km (0.064 R)
- M16: 4,285,680 km (0.086 R)
- M17: 4,443,057 km (0.08 R)
- M18: 4,763,346 km (0.115 R)
- M19: 5,329,873 km (0.09 R)
- M20: 6,863,251 km (0.097 R)
- M21: 7,528,662 km (0.117 R)
- M22: 7,609,744 km (0.09 R)
- M23: 7,992,715 km (0.032 R)
- M24: 8,270,069 km (0.086 R)
- M25: 8,891,499 km (0.096 R)
- M26: 9,265,643 km (0.096 R)
- M27: 9,498,567 km (0.09 R)
- M28: 9,733,286 km (0.103 R)
- M29: 10,328,686 km (0.113 R)
- M30: 11,710,821 km (0.093 R)
- M31: 13,215,476 km (0.048 R)
- M32: 13,411,898 km (0.066 R)
- M33: 13,774,523 km (0.092 R)
- M34: 14,274,330 km (0.064 R)
- M35: 14,543,307 km (0.093 R)
- M36: 14,983,872 km (0.075 R)
- M37: 15,843,462 km (0.111 R)
- M38: 16,825,123 km (0.086 R)
- M39: 17,002,546 km (0.113 R)
- M40: 17,216,172 km (0.083 R)
- M41: 18,007,245 km (0.085 R)
- M42: 18,334,266 km (0.09 R)
- M43: 18,516,776 km (0.055 R)
- M44: 19,068,044 km (0.094 R)
- M45: 19,587,448 km (0.116 R)
- M46: 20,829,858 km (0.117 R)
- M47: 20,982,149 km (0.117 R)
- M48: 21,364,670 km (0.034 R)
- M49: 23,985,924 km (0.103 R)
- M50: 24,828,160 km (0.104 R)
- M51: 25,761,801 km (0.117 R)
- M52: 26,541,654 km (0.057 R)
- M53: 27,914,364 km (0.114 R)
Planet 5 - Ice Giant
Semi-Major Axis: 8.97 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 883.9
Radius: 7.8
Gravity: 14.53 G
Time & Orbit
Eccentricity (e): 0.185
Orbit Range: 7.31 AU - 10.63 AU
Year: 17346 Days
Day: 24.5 Hours
Environment
Temp: -231 °C
Axial Tilt: 71.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (92)
Outer Limit: 74,586,474 km
- M1: 103,671 km (0.111 R)
- M2: 235,168 km (0.104 R)
- M3: 507,735 km (0.104 R)
- M4: 938,278 km (0.096 R)
- M5: 989,141 km (0.108 R)
- M6: 1,041,201 km (0.09 R)
- M7: 2,657,008 km (0.059 R)
- M8: 3,954,171 km (0.07 R)
- M9: 4,123,067 km (0.112 R)
- M10: 4,337,590 km (0.09 R)
- M11: 4,822,287 km (0.095 R)
- M12: 6,230,153 km (0.053 R)
- M13: 6,978,591 km (0.082 R)
- M14: 7,131,779 km (0.116 R)
- M15: 7,755,303 km (0.073 R)
- M16: 8,234,465 km (0.09 R)
- M17: 8,450,485 km (0.075 R)
- M18: 9,109,762 km (0.089 R)
- M19: 9,389,361 km (0.119 R)
- M20: 9,728,649 km (0.114 R)
- M21: 10,535,729 km (0.105 R)
- M22: 10,829,240 km (0.049 R)
- M23: 10,888,331 km (0.048 R)
- M24: 11,066,054 km (0.028 R)
- M25: 11,304,513 km (0.039 R)
- M26: 12,522,090 km (0.104 R)
- M27: 13,272,473 km (0.119 R)
- M28: 15,343,655 km (0.07 R)
- M29: 16,893,489 km (0.049 R)
- M30: 18,000,813 km (0.116 R)
- M31: 18,140,836 km (0.118 R)
- M32: 19,489,311 km (0.057 R)
- M33: 20,357,577 km (0.096 R)
- M34: 20,723,045 km (0.094 R)
- M35: 21,017,005 km (0.109 R)
- M36: 22,356,803 km (0.077 R)
- M37: 22,658,243 km (0.097 R)
- M38: 23,037,025 km (0.054 R)
- M39: 23,800,872 km (0.09 R)
- M40: 23,954,658 km (0.102 R)
- M41: 24,108,744 km (0.106 R)
- M42: 25,040,140 km (0.075 R)
- M43: 25,431,638 km (0.093 R)
- M44: 25,825,230 km (0.12 R)
- M45: 26,858,054 km (0.069 R)
- M46: 26,938,089 km (0.107 R)
- M47: 27,580,911 km (0.112 R)
- M48: 28,228,819 km (0.054 R)
- M49: 28,636,324 km (0.103 R)
- M50: 29,292,460 km (0.107 R)
- M51: 29,705,051 km (0.068 R)
- M52: 30,036,410 km (0.099 R)
- M53: 32,646,295 km (0.076 R)
- M54: 33,331,453 km (0.061 R)
- M55: 34,108,015 km (0.111 R)
- M56: 36,296,333 km (0.096 R)
- M57: 36,384,745 km (0.114 R)
- M58: 38,079,240 km (0.101 R)
- M59: 38,981,465 km (0.12 R)
- M60: 39,162,778 km (0.102 R)
- M61: 39,708,212 km (0.105 R)
- M62: 40,073,380 km (0.119 R)
- M63: 40,347,892 km (0.092 R)
- M64: 40,531,299 km (0.084 R)
- M65: 40,898,861 km (0.118 R)
- M66: 41,730,027 km (0.089 R)
- M67: 41,915,379 km (0.086 R)
- M68: 42,194,079 km (0.105 R)
- M69: 42,753,276 km (0.039 R)
- M70: 46,159,769 km (0.096 R)
- M71: 46,351,554 km (0.12 R)
- M72: 47,895,404 km (0.096 R)
- M73: 48,673,762 km (0.108 R)
- M74: 49,064,362 km (0.044 R)
- M75: 49,162,199 km (0.109 R)
- M76: 52,327,241 km (0.114 R)
- M77: 53,530,905 km (0.099 R)
- M78: 54,136,178 km (0.086 R)
- M79: 55,150,003 km (0.076 R)
- M80: 56,785,257 km (0.06 R)
- M81: 56,888,031 km (0.094 R)
- M82: 59,163,564 km (0.104 R)
- M83: 59,476,224 km (0.117 R)
- M84: 60,417,344 km (0.068 R)
- M85: 60,627,080 km (0.104 R)
- M86: 61,996,798 km (0.094 R)
- M87: 65,519,230 km (0.069 R)
- M88: 65,626,940 km (0.084 R)
- M89: 68,012,278 km (0.119 R)
- M90: 73,762,222 km (0.06 R)
- M91: 74,323,364 km (0.036 R)
- M92: 74,548,060 km (0.032 R)
Planet 6 - Ice Giant
Semi-Major Axis: 9.34 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 759.8
Radius: 3.4
Gravity: 65.73 G
Time & Orbit
Eccentricity (e): 0.043
Orbit Range: 8.94 AU - 9.74 AU
Year: 18430 Days
Day: 23.6 Hours
Environment
Temp: -226 °C
Axial Tilt: 43.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (95)
Outer Limit: 74,586,474 km
- M1: 509,680 km (0.08 R)
- M2: 1,393,355 km (0.082 R)
- M3: 1,635,105 km (0.112 R)
- M4: 1,729,052 km (0.077 R)
- M5: 1,760,767 km (0.115 R)
- M6: 1,889,571 km (0.073 R)
- M7: 2,088,685 km (0.105 R)
- M8: 2,259,526 km (0.079 R)
- M9: 2,651,323 km (0.025 R)
- M10: 3,218,748 km (0.077 R)
- M11: 3,336,631 km (0.037 R)
- M12: 5,083,934 km (0.055 R)
- M13: 5,593,315 km (0.1 R)
- M14: 6,118,703 km (0.112 R)
- M15: 6,961,238 km (0.083 R)
- M16: 7,318,627 km (0.081 R)
- M17: 7,682,000 km (0.092 R)
- M18: 7,786,868 km (0.117 R)
- M19: 7,998,101 km (0.117 R)
- M20: 8,806,827 km (0.081 R)
- M21: 9,248,739 km (0.119 R)
- M22: 9,360,339 km (0.096 R)
- M23: 10,211,401 km (0.103 R)
- M24: 11,623,605 km (0.111 R)
- M25: 12,784,335 km (0.086 R)
- M26: 13,095,947 km (0.102 R)
- M27: 13,536,214 km (0.113 R)
- M28: 14,755,736 km (0.115 R)
- M29: 16,278,193 km (0.099 R)
- M30: 16,548,068 km (0.082 R)
- M31: 16,751,371 km (0.067 R)
- M32: 17,023,789 km (0.072 R)
- M33: 17,229,037 km (0.098 R)
- M34: 17,919,282 km (0.066 R)
- M35: 18,900,644 km (0.065 R)
- M36: 19,540,623 km (0.12 R)
- M37: 20,405,000 km (0.107 R)
- M38: 20,550,259 km (0.079 R)
- M39: 20,841,975 km (0.054 R)
- M40: 23,299,120 km (0.106 R)
- M41: 23,831,988 km (0.039 R)
- M42: 24,061,621 km (0.094 R)
- M43: 24,138,364 km (0.117 R)
- M44: 26,003,251 km (0.115 R)
- M45: 26,239,616 km (0.083 R)
- M46: 26,476,729 km (0.107 R)
- M47: 28,236,897 km (0.113 R)
- M48: 29,049,363 km (0.025 R)
- M49: 29,212,874 km (0.07 R)
- M50: 29,787,180 km (0.114 R)
- M51: 30,614,157 km (0.113 R)
- M52: 30,780,510 km (0.043 R)
- M53: 30,863,686 km (0.096 R)
- M54: 31,113,964 km (0.1 R)
- M55: 31,364,839 km (0.115 R)
- M56: 31,700,537 km (0.094 R)
- M57: 32,629,540 km (0.116 R)
- M58: 33,054,697 km (0.104 R)
- M59: 33,396,229 km (0.09 R)
- M60: 35,295,374 km (0.064 R)
- M61: 35,994,594 km (0.083 R)
- M62: 36,521,927 km (0.096 R)
- M63: 36,610,189 km (0.119 R)
- M64: 36,963,390 km (0.069 R)
- M65: 37,673,381 km (0.073 R)
- M66: 38,298,401 km (0.047 R)
- M67: 38,656,987 km (0.066 R)
- M68: 39,016,770 km (0.113 R)
- M69: 39,377,750 km (0.091 R)
- M70: 39,558,464 km (0.116 R)
- M71: 39,830,283 km (0.117 R)
- M72: 41,382,212 km (0.112 R)
- M73: 42,211,732 km (0.072 R)
- M74: 43,980,876 km (0.064 R)
- M75: 44,733,054 km (0.116 R)
- M76: 44,921,847 km (0.053 R)
- M77: 45,869,250 km (0.087 R)
- M78: 46,536,457 km (0.086 R)
- M79: 47,398,889 km (0.095 R)
- M80: 47,880,294 km (0.1 R)
- M81: 48,557,075 km (0.106 R)
- M82: 51,888,620 km (0.097 R)
- M83: 54,384,960 km (0.084 R)
- M84: 57,636,918 km (0.083 R)
- M85: 58,356,633 km (0.107 R)
- M86: 59,493,577 km (0.107 R)
- M87: 60,116,802 km (0.098 R)
- M88: 62,525,926 km (0.062 R)
- M89: 64,326,785 km (0.063 R)
- M90: 64,646,326 km (0.098 R)
- M91: 65,394,016 km (0.1 R)
- M92: 69,721,135 km (0.087 R)
- M93: 70,378,019 km (0.116 R)
- M94: 72,250,685 km (0.075 R)
- M95: 74,474,757 km (0.096 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: 417 - 11,116 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.