Star System Generated (Seed: 1766438574)
Star Details
Spectral Class: M5V
Temperature: 3,050 K
Mass: 0.3 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: 11 AU
Planetary System (6 Planets)
Planet 1 - Gas Giant
Semi-Major Axis: 0.76 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 673.7
Radius: 12.4
Gravity: 4.38 G
Time & Orbit
Eccentricity (e): 0.035
Orbit Range: 0.73 AU - 0.79 AU
Year: 442 Days
Day: 8.6 Hours
Environment
Temp: -157 °C
Axial Tilt: 27.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (41)
Outer Limit: 60,164,768 km
- M1: 156,928 km (0.114 R)
- M2: 248,183 km (0.107 R)
- M3: 326,871 km (0.103 R)
- M4: 413,788 km (0.108 R)
- M5: 515,215 km (0.067 R)
- M6: 597,344 km (0.117 R)
- M7: 728,691 km (0.042 R)
- M8: 836,551 km (0.096 R)
- M9: 923,617 km (0.099 R)
- M10: 1,004,849 km (0.116 R)
- M11: 1,136,495 km (0.082 R)
- M12: 1,249,292 km (0.11 R)
- M13: 1,460,225 km (0.104 R)
- M14: 1,540,559 km (0.037 R)
- M15: 1,716,935 km (0.12 R)
- M16: 1,801,906 km (0.119 R)
- M17: 1,929,364 km (0.092 R)
- M18: 2,036,027 km (0.092 R)
- M19: 2,138,651 km (0.051 R)
- M20: 2,292,737 km (0.038 R)
- M21: 2,374,417 km (0.072 R)
- M22: 2,489,159 km (0.09 R)
- M23: 2,730,909 km (0.108 R)
- M24: 2,858,067 km (0.114 R)
- M25: 3,272,902 km (0.102 R)
- M26: 3,625,953 km (0.104 R)
- M27: 3,729,176 km (0.113 R)
- M28: 3,893,434 km (0.113 R)
- M29: 3,976,461 km (0.055 R)
- M30: 4,090,604 km (0.098 R)
- M31: 4,205,795 km (0.041 R)
- M32: 4,322,182 km (0.11 R)
- M33: 4,510,675 km (0.117 R)
- M34: 4,598,040 km (0.043 R)
- M35: 4,798,651 km (0.09 R)
- M36: 4,912,196 km (0.119 R)
- M37: 5,051,322 km (0.107 R)
- M38: 5,308,630 km (0.098 R)
- M39: 5,434,591 km (0.042 R)
- M40: 5,536,168 km (0.108 R)
- M41: 5,922,580 km (0.066 R)
Planet 2 - Gas Giant
Semi-Major Axis: 2.7 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 912.3
Radius: 8.3
Gravity: 13.24 G
Time & Orbit
Eccentricity (e): 0.184
Orbit Range: 2.2 AU - 3.2 AU
Year: 2959 Days
Day: 9.1 Hours
Environment
Temp: -203 °C
Axial Tilt: 8.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (78)
Outer Limit: 60,164,768 km
- M1: 137,780 km (0.099 R)
- M2: 318,344 km (0.099 R)
- M3: 498,460 km (0.105 R)
- M4: 691,142 km (0.111 R)
- M5: 775,067 km (0.059 R)
- M6: 851,511 km (0.06 R)
- M7: 1,084,435 km (0.111 R)
- M8: 1,595,162 km (0.08 R)
- M9: 1,795,174 km (0.104 R)
- M10: 1,973,196 km (0.091 R)
- M11: 2,411,069 km (0.086 R)
- M12: 2,525,212 km (0.118 R)
- M13: 2,827,101 km (0.117 R)
- M14: 2,912,970 km (0.115 R)
- M15: 3,355,630 km (0.047 R)
- M16: 3,668,738 km (0.111 R)
- M17: 3,762,686 km (0.067 R)
- M18: 4,263,988 km (0.119 R)
- M19: 4,382,619 km (0.12 R)
- M20: 4,704,554 km (0.087 R)
- M21: 4,806,729 km (0.084 R)
- M22: 4,930,297 km (0.115 R)
- M23: 5,413,797 km (0.074 R)
- M24: 5,585,536 km (0.099 R)
- M25: 6,245,711 km (0.11 R)
- M26: 6,883,896 km (0.095 R)
- M27: 6,953,608 km (0.113 R)
- M28: 7,046,808 km (0.109 R)
- M29: 7,258,040 km (0.098 R)
- M30: 8,001,541 km (0.12 R)
- M31: 8,172,831 km (0.098 R)
- M32: 8,295,800 km (0.091 R)
- M33: 8,419,518 km (0.097 R)
- M34: 9,021,799 km (0.058 R)
- M35: 9,098,094 km (0.059 R)
- M36: 9,508,441 km (0.044 R)
- M37: 10,320,757 km (0.095 R)
- M38: 10,373,864 km (0.098 R)
- M39: 10,480,528 km (0.063 R)
- M40: 10,533,934 km (0.115 R)
- M41: 10,667,974 km (0.1 R)
- M42: 10,721,679 km (0.113 R)
- M43: 11,483,881 km (0.108 R)
- M44: 11,539,082 km (0.109 R)
- M45: 11,621,810 km (0.052 R)
- M46: 11,677,161 km (0.101 R)
- M47: 11,983,089 km (0.114 R)
- M48: 12,291,709 km (0.072 R)
- M49: 12,716,567 km (0.067 R)
- M50: 12,802,287 km (0.025 R)
- M51: 12,888,006 km (0.094 R)
- M52: 13,756,272 km (0.12 R)
- M53: 13,873,407 km (0.069 R)
- M54: 14,345,538 km (0.101 R)
- M55: 14,643,238 km (0.049 R)
- M56: 14,732,997 km (0.086 R)
- M57: 15,335,727 km (0.1 R)
- M58: 15,915,867 km (0.089 R)
- M59: 16,069,803 km (0.047 R)
- M60: 16,410,138 km (0.1 R)
- M61: 16,503,338 km (0.12 R)
- M62: 16,690,186 km (0.079 R)
- M63: 16,909,197 km (0.116 R)
- M64: 18,371,965 km (0.118 R)
- M65: 20,040,580 km (0.098 R)
- M66: 20,140,212 km (0.084 R)
- M67: 20,273,354 km (0.058 R)
- M68: 20,741,595 km (0.06 R)
- M69: 20,876,084 km (0.097 R)
- M70: 20,943,403 km (0.099 R)
- M71: 21,010,871 km (0.086 R)
- M72: 21,382,921 km (0.096 R)
- M73: 21,791,174 km (0.081 R)
- M74: 22,408,564 km (0.109 R)
- M75: 22,615,608 km (0.115 R)
- M76: 22,823,399 km (0.083 R)
- M77: 22,927,370 km (0.061 R)
- M78: 23,415,208 km (0.07 R)
Planet 3 - Gas Giant
Semi-Major Axis: 2.9 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 92.6
Radius: 11.4
Gravity: 0.71 G
Time & Orbit
Eccentricity (e): 0.074
Orbit Range: 2.69 AU - 3.11 AU
Year: 3293 Days
Day: 13.7 Hours
Environment
Temp: -220 °C
Axial Tilt: 2.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (56)
Outer Limit: 60,164,768 km
- M1: 153,338 km (0.047 R)
- M2: 475,721 km (0.069 R)
- M3: 587,920 km (0.058 R)
- M4: 685,009 km (0.106 R)
- M5: 925,562 km (0.058 R)
- M6: 1,012,179 km (0.059 R)
- M7: 1,170,603 km (0.093 R)
- M8: 1,386,922 km (0.074 R)
- M9: 1,521,560 km (0.106 R)
- M10: 1,616,704 km (0.078 R)
- M11: 1,713,943 km (0.111 R)
- M12: 1,831,377 km (0.095 R)
- M13: 2,279,273 km (0.111 R)
- M14: 2,603,601 km (0.096 R)
- M15: 2,750,207 km (0.116 R)
- M16: 2,867,342 km (0.116 R)
- M17: 2,942,889 km (0.032 R)
- M18: 3,019,035 km (0.103 R)
- M19: 3,559,083 km (0.083 R)
- M20: 3,687,139 km (0.096 R)
- M21: 3,769,418 km (0.118 R)
- M22: 3,840,477 km (0.108 R)
- M23: 4,008,026 km (0.073 R)
- M24: 4,325,772 km (0.116 R)
- M25: 4,450,088 km (0.089 R)
- M26: 4,563,184 km (0.117 R)
- M27: 4,664,462 km (0.106 R)
- M28: 4,830,515 km (0.069 R)
- M29: 4,946,753 km (0.034 R)
- M30: 5,024,693 km (0.098 R)
- M31: 5,103,083 km (0.118 R)
- M32: 5,195,085 km (0.098 R)
- M33: 5,394,200 km (0.118 R)
- M34: 5,582,245 km (0.099 R)
- M35: 5,663,476 km (0.101 R)
- M36: 5,868,425 km (0.083 R)
- M37: 6,341,903 km (0.075 R)
- M38: 6,540,569 km (0.117 R)
- M39: 6,900,501 km (0.117 R)
- M40: 7,222,436 km (0.107 R)
- M41: 7,296,337 km (0.096 R)
- M42: 7,835,787 km (0.081 R)
- M43: 7,972,669 km (0.114 R)
- M44: 8,079,781 km (0.101 R)
- M45: 8,341,727 km (0.105 R)
- M46: 8,543,834 km (0.115 R)
- M47: 8,684,755 km (0.112 R)
- M48: 9,256,368 km (0.107 R)
- M49: 9,546,738 km (0.083 R)
- M50: 9,660,432 km (0.042 R)
- M51: 9,791,031 km (0.084 R)
- M52: 10,086,936 km (0.115 R)
- M53: 10,569,838 km (0.106 R)
- M54: 10,856,467 km (0.066 R)
- M55: 11,162,694 km (0.057 R)
- M56: 11,610,141 km (0.09 R)
Planet 4 - Gas Giant
Semi-Major Axis: 3.63 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 308.2
Radius: 13.3
Gravity: 1.74 G
Time & Orbit
Eccentricity (e): 0.177
Orbit Range: 2.99 AU - 4.27 AU
Year: 4612 Days
Day: 5.8 Hours
Environment
Temp: -215 °C
Axial Tilt: 22.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (77)
Outer Limit: 60,164,768 km
- M1: 339,438 km (0.069 R)
- M2: 438,471 km (0.116 R)
- M3: 534,364 km (0.066 R)
- M4: 937,679 km (0.054 R)
- M5: 1,197,082 km (0.071 R)
- M6: 1,480,421 km (0.116 R)
- M7: 1,610,571 km (0.104 R)
- M8: 1,744,760 km (0.103 R)
- M9: 1,868,777 km (0.063 R)
- M10: 2,010,296 km (0.11 R)
- M11: 2,140,895 km (0.09 R)
- M12: 2,229,607 km (0.084 R)
- M13: 2,441,437 km (0.06 R)
- M14: 2,581,311 km (0.032 R)
- M15: 2,852,831 km (0.079 R)
- M16: 2,950,968 km (0.091 R)
- M17: 3,083,511 km (0.045 R)
- M18: 3,269,162 km (0.103 R)
- M19: 3,581,223 km (0.053 R)
- M20: 3,705,240 km (0.051 R)
- M21: 4,067,417 km (0.074 R)
- M22: 4,271,618 km (0.094 R)
- M23: 4,651,746 km (0.078 R)
- M24: 5,182,220 km (0.112 R)
- M25: 5,282,750 km (0.11 R)
- M26: 5,383,728 km (0.077 R)
- M27: 5,505,950 km (0.103 R)
- M28: 5,982,718 km (0.08 R)
- M29: 6,173,007 km (0.054 R)
- M30: 6,429,866 km (0.079 R)
- M31: 6,777,831 km (0.05 R)
- M32: 6,998,488 km (0.107 R)
- M33: 7,154,369 km (0.097 R)
- M34: 7,266,417 km (0.113 R)
- M35: 7,401,654 km (0.083 R)
- M36: 7,674,670 km (0.112 R)
- M37: 7,927,939 km (0.086 R)
- M38: 8,348,309 km (0.063 R)
- M39: 8,776,009 km (0.08 R)
- M40: 8,896,137 km (0.107 R)
- M41: 9,259,659 km (0.089 R)
- M42: 9,480,167 km (0.067 R)
- M43: 9,677,636 km (0.084 R)
- M44: 9,826,785 km (0.047 R)
- M45: 10,001,515 km (0.101 R)
- M46: 10,152,160 km (0.072 R)
- M47: 10,762,520 km (0.119 R)
- M48: 10,994,546 km (0.109 R)
- M49: 11,176,008 km (0.073 R)
- M50: 11,568,403 km (0.084 R)
- M51: 12,045,471 km (0.074 R)
- M52: 12,259,396 km (0.08 R)
- M53: 12,420,812 km (0.052 R)
- M54: 12,610,053 km (0.106 R)
- M55: 12,963,852 km (0.094 R)
- M56: 13,514,672 km (0.03 R)
- M57: 13,737,124 km (0.045 R)
- M58: 13,820,898 km (0.08 R)
- M59: 13,960,922 km (0.115 R)
- M60: 14,411,960 km (0.108 R)
- M61: 14,753,342 km (0.116 R)
- M62: 15,126,290 km (0.088 R)
- M63: 15,706,131 km (0.064 R)
- M64: 15,910,781 km (0.092 R)
- M65: 16,204,741 km (0.091 R)
- M66: 16,798,046 km (0.073 R)
- M67: 17,368,313 km (0.116 R)
- M68: 17,610,213 km (0.099 R)
- M69: 17,853,459 km (0.074 R)
- M70: 18,036,566 km (0.071 R)
- M71: 18,220,273 km (0.097 R)
- M72: 18,527,846 km (0.116 R)
- M73: 18,992,347 km (0.045 R)
- M74: 19,272,993 km (0.073 R)
- M75: 19,398,206 km (0.108 R)
- M76: 19,901,454 km (0.079 R)
- M77: 21,664,464 km (0.095 R)
Planet 5 - Gas Giant
Semi-Major Axis: 4.03 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 761.7
Radius: 10.8
Gravity: 6.53 G
Time & Orbit
Eccentricity (e): 0.191
Orbit Range: 3.26 AU - 4.8 AU
Year: 5395 Days
Day: 8.5 Hours
Environment
Temp: -227 °C
Axial Tilt: 0.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (77)
Outer Limit: 60,164,768 km
- M1: 157,826 km (0.078 R)
- M2: 416,480 km (0.099 R)
- M3: 1,034,020 km (0.101 R)
- M4: 1,346,381 km (0.089 R)
- M5: 1,496,727 km (0.068 R)
- M6: 1,670,559 km (0.089 R)
- M7: 2,251,598 km (0.117 R)
- M8: 2,492,749 km (0.079 R)
- M9: 2,575,028 km (0.109 R)
- M10: 2,806,007 km (0.078 R)
- M11: 3,109,841 km (0.117 R)
- M12: 3,243,431 km (0.098 R)
- M13: 4,255,760 km (0.118 R)
- M14: 4,404,461 km (0.041 R)
- M15: 4,732,529 km (0.108 R)
- M16: 4,835,153 km (0.118 R)
- M17: 5,439,229 km (0.088 R)
- M18: 6,095,066 km (0.065 R)
- M19: 6,319,313 km (0.094 R)
- M20: 6,489,256 km (0.062 R)
- M21: 6,718,291 km (0.037 R)
- M22: 6,833,780 km (0.081 R)
- M23: 6,920,846 km (0.038 R)
- M24: 7,037,533 km (0.032 R)
- M25: 7,154,817 km (0.087 R)
- M26: 7,630,688 km (0.117 R)
- M27: 7,781,632 km (0.063 R)
- M28: 8,960,015 km (0.087 R)
- M29: 9,602,538 km (0.117 R)
- M30: 9,732,837 km (0.037 R)
- M31: 10,160,388 km (0.054 R)
- M32: 10,293,231 km (0.025 R)
- M33: 10,426,523 km (0.088 R)
- M34: 10,526,903 km (0.09 R)
- M35: 11,067,998 km (0.096 R)
- M36: 12,106,656 km (0.079 R)
- M37: 12,673,333 km (0.076 R)
- M38: 12,852,103 km (0.058 R)
- M39: 12,959,963 km (0.093 R)
- M40: 13,284,889 km (0.077 R)
- M41: 13,795,766 km (0.104 R)
- M42: 13,942,970 km (0.069 R)
- M43: 14,053,673 km (0.051 R)
- M44: 14,462,075 km (0.105 R)
- M45: 16,018,790 km (0.094 R)
- M46: 16,328,757 km (0.104 R)
- M47: 17,310,119 km (0.084 R)
- M48: 17,429,199 km (0.113 R)
- M49: 17,867,970 km (0.053 R)
- M50: 18,068,730 km (0.038 R)
- M51: 18,229,697 km (0.111 R)
- M52: 18,472,345 km (0.027 R)
- M53: 19,825,308 km (0.071 R)
- M54: 20,116,426 km (0.098 R)
- M55: 20,241,489 km (0.042 R)
- M56: 20,955,819 km (0.082 R)
- M57: 21,763,947 km (0.049 R)
- M58: 22,929,913 km (0.055 R)
- M59: 23,148,027 km (0.089 R)
- M60: 23,454,553 km (0.104 R)
- M61: 24,828,310 km (0.077 R)
- M62: 25,864,425 km (0.101 R)
- M63: 26,228,097 km (0.105 R)
- M64: 27,792,442 km (0.09 R)
- M65: 28,258,439 km (0.095 R)
- M66: 29,292,460 km (0.108 R)
- M67: 29,481,701 km (0.106 R)
- M68: 29,861,680 km (0.116 R)
- M69: 30,243,154 km (0.114 R)
- M70: 30,482,511 km (0.111 R)
- M71: 30,674,295 km (0.091 R)
- M72: 31,155,701 km (0.062 R)
- M73: 31,785,359 km (0.092 R)
- M74: 31,882,597 km (0.11 R)
- M75: 32,174,912 km (0.091 R)
- M76: 32,468,123 km (0.095 R)
- M77: 32,762,233 km (0.068 R)
Planet 6 - Ice Giant
Semi-Major Axis: 7.61 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 691.2
Radius: 4
Gravity: 43.2 G
Time & Orbit
Eccentricity (e): 0.171
Orbit Range: 6.31 AU - 8.91 AU
Year: 13999 Days
Day: 16.1 Hours
Environment
Temp: -238 °C
Axial Tilt: 42.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (97)
Outer Limit: 60,164,768 km
- M1: 51,611 km (0.065 R)
- M2: 138,827 km (0.112 R)
- M3: 219,759 km (0.089 R)
- M4: 410,048 km (0.1 R)
- M5: 662,270 km (0.119 R)
- M6: 1,513,332 km (0.116 R)
- M7: 1,754,633 km (0.026 R)
- M8: 1,809,985 km (0.114 R)
- M9: 2,153,761 km (0.055 R)
- M10: 2,303,059 km (0.077 R)
- M11: 2,674,660 km (0.049 R)
- M12: 3,064,812 km (0.081 R)
- M13: 3,098,022 km (0.074 R)
- M14: 3,300,578 km (0.105 R)
- M15: 3,753,710 km (0.103 R)
- M16: 4,263,390 km (0.036 R)
- M17: 4,755,866 km (0.072 R)
- M18: 4,871,954 km (0.086 R)
- M19: 5,266,144 km (0.113 R)
- M20: 5,793,626 km (0.102 R)
- M21: 6,126,482 km (0.032 R)
- M22: 6,295,378 km (0.102 R)
- M23: 7,295,290 km (0.085 R)
- M24: 7,564,117 km (0.071 R)
- M25: 8,343,522 km (0.032 R)
- M26: 8,861,280 km (0.118 R)
- M27: 9,004,296 km (0.08 R)
- M28: 9,148,059 km (0.091 R)
- M29: 9,389,361 km (0.078 R)
- M30: 10,931,715 km (0.079 R)
- M31: 10,982,728 km (0.077 R)
- M32: 11,136,365 km (0.062 R)
- M33: 13,579,298 km (0.11 R)
- M34: 13,634,200 km (0.097 R)
- M35: 14,242,914 km (0.085 R)
- M36: 14,747,358 km (0.06 R)
- M37: 15,486,521 km (0.063 R)
- M38: 15,543,817 km (0.086 R)
- M39: 15,658,708 km (0.118 R)
- M40: 16,179,309 km (0.108 R)
- M41: 17,955,185 km (0.061 R)
- M42: 18,075,761 km (0.085 R)
- M43: 18,378,398 km (0.058 R)
- M44: 18,621,644 km (0.117 R)
- M45: 19,173,062 km (0.07 R)
- M46: 20,417,267 km (0.114 R)
- M47: 21,623,175 km (0.111 R)
- M48: 22,331,970 km (0.049 R)
- M49: 22,982,721 km (0.076 R)
- M50: 24,838,034 km (0.093 R)
- M51: 26,055,910 km (0.1 R)
- M52: 26,534,773 km (0.11 R)
- M53: 27,016,478 km (0.054 R)
- M54: 28,198,451 km (0.074 R)
- M55: 28,408,785 km (0.108 R)
- M56: 28,549,258 km (0.114 R)
- M57: 28,690,029 km (0.109 R)
- M58: 29,042,931 km (0.116 R)
- M59: 29,255,360 km (0.057 R)
- M60: 30,110,012 km (0.094 R)
- M61: 30,756,574 km (0.1 R)
- M62: 31,334,920 km (0.105 R)
- M63: 32,063,162 km (0.055 R)
- M64: 32,429,228 km (0.075 R)
- M65: 33,387,702 km (0.074 R)
- M66: 33,833,204 km (0.096 R)
- M67: 34,205,852 km (0.104 R)
- M68: 34,430,249 km (0.12 R)
- M69: 34,880,240 km (0.103 R)
- M70: 35,862,050 km (0.114 R)
- M71: 36,166,033 km (0.115 R)
- M72: 36,242,179 km (0.12 R)
- M73: 36,318,324 km (0.104 R)
- M74: 37,467,236 km (0.07 R)
- M75: 37,698,364 km (0.11 R)
- M76: 37,930,091 km (0.075 R)
- M77: 38,317,251 km (0.11 R)
- M78: 38,472,533 km (0.095 R)
- M79: 38,939,578 km (0.086 R)
- M80: 40,036,429 km (0.106 R)
- M81: 44,198,691 km (0.119 R)
- M82: 46,000,448 km (0.112 R)
- M83: 46,993,329 km (0.117 R)
- M84: 48,412,115 km (0.054 R)
- M85: 48,663,888 km (0.106 R)
- M86: 48,747,962 km (0.112 R)
- M87: 49,337,527 km (0.111 R)
- M88: 50,183,952 km (0.025 R)
- M89: 51,035,014 km (0.111 R)
- M90: 51,120,435 km (0.078 R)
- M91: 52,234,640 km (0.075 R)
- M92: 55,800,903 km (0.095 R)
- M93: 56,241,170 km (0.054 R)
- M94: 57,479,990 km (0.094 R)
- M95: 57,924,595 km (0.092 R)
- M96: 58,102,766 km (0.103 R)
- M97: 58,996,314 km (0.116 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: 318 - 13,222 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.