Star System Generated (Seed: 1767410272)
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 (7 Planets)
Asteroid Belt
Center: 0.44 AU
Composition
Type: Inner (Rocky/Metallic)
A dense region of planetesimals and debris.
Boundary
Planet 1 - Gas Giant
Semi-Major Axis: 0.87 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 296.1
Radius: 9.3
Gravity: 3.42 G
Time & Orbit
Eccentricity (e): 0.055
Orbit Range: 0.82 AU - 0.92 AU
Year: 524 Days
Day: 10.6 Hours
Environment
Temp: -147 °C
Axial Tilt: 95.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (44)
Outer Limit: 53,363,147 km
- M1: 136,433 km (0.057 R)
- M2: 213,476 km (0.1 R)
- M3: 311,612 km (0.118 R)
- M4: 383,868 km (0.112 R)
- M5: 559,197 km (0.1 R)
- M6: 648,507 km (0.118 R)
- M7: 735,573 km (0.115 R)
- M8: 819,198 km (0.098 R)
- M9: 890,107 km (0.089 R)
- M10: 975,677 km (0.093 R)
- M11: 1,038,658 km (0.088 R)
- M12: 1,103,135 km (0.107 R)
- M13: 1,245,402 km (0.105 R)
- M14: 1,304,942 km (0.058 R)
- M15: 1,417,589 km (0.085 R)
- M16: 1,533,528 km (0.073 R)
- M17: 1,632,711 km (0.104 R)
- M18: 1,728,903 km (0.092 R)
- M19: 1,801,009 km (0.118 R)
- M20: 1,900,641 km (0.089 R)
- M21: 2,249,802 km (0.06 R)
- M22: 2,340,159 km (0.108 R)
- M23: 2,426,178 km (0.03 R)
- M24: 2,501,576 km (0.039 R)
- M25: 2,571,887 km (0.107 R)
- M26: 2,654,764 km (0.049 R)
- M27: 2,720,437 km (0.098 R)
- M28: 2,786,709 km (0.107 R)
- M29: 2,859,713 km (0.091 R)
- M30: 2,976,549 km (0.117 R)
- M31: 3,107,597 km (0.107 R)
- M32: 3,183,293 km (0.029 R)
- M33: 3,343,064 km (0.093 R)
- M34: 3,571,350 km (0.097 R)
- M35: 3,644,204 km (0.083 R)
- M36: 3,750,867 km (0.099 R)
- M37: 3,811,455 km (0.099 R)
- M38: 3,954,021 km (0.083 R)
- M39: 4,146,853 km (0.078 R)
- M40: 4,406,405 km (0.083 R)
- M41: 4,570,365 km (0.051 R)
- M42: 4,700,215 km (0.102 R)
- M43: 4,772,920 km (0.1 R)
- M44: 4,963,508 km (0.119 R)
Planet 2 - Gas Giant
Semi-Major Axis: 1.2 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 101.9
Radius: 9.3
Gravity: 1.18 G
Time & Orbit
Eccentricity (e): 0.063
Orbit Range: 1.12 AU - 1.28 AU
Year: 849 Days
Day: 5 Hours
Environment
Temp: -168 °C
Axial Tilt: 32.5 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (36)
Outer Limit: 53,363,147 km
- M1: 138,079 km (0.115 R)
- M2: 216,019 km (0.084 R)
- M3: 319,691 km (0.084 R)
- M4: 393,891 km (0.076 R)
- M5: 472,280 km (0.114 R)
- M6: 644,019 km (0.106 R)
- M7: 761,603 km (0.057 R)
- M8: 867,518 km (0.085 R)
- M9: 978,520 km (0.117 R)
- M10: 1,044,343 km (0.072 R)
- M11: 1,137,243 km (0.115 R)
- M12: 1,291,179 km (0.105 R)
- M13: 1,433,297 km (0.074 R)
- M14: 1,499,270 km (0.064 R)
- M15: 1,738,327 km (0.094 R)
- M16: 1,896,153 km (0.113 R)
- M17: 1,963,622 km (0.116 R)
- M18: 2,112,023 km (0.03 R)
- M19: 2,358,261 km (0.062 R)
- M20: 2,425,580 km (0.105 R)
- M21: 2,504,867 km (0.114 R)
- M22: 2,724,626 km (0.094 R)
- M23: 2,854,776 km (0.112 R)
- M24: 2,968,919 km (0.105 R)
- M25: 3,041,774 km (0.058 R)
- M26: 3,195,411 km (0.055 R)
- M27: 3,314,042 km (0.099 R)
- M28: 3,472,316 km (0.113 R)
- M29: 3,665,597 km (0.102 R)
- M30: 3,783,181 km (0.048 R)
- M31: 3,942,053 km (0.095 R)
- M32: 4,049,315 km (0.049 R)
- M33: 4,225,392 km (0.069 R)
- M34: 4,522,493 km (0.084 R)
- M35: 4,641,872 km (0.117 R)
- M36: 4,762,149 km (0.099 R)
Planet 3 - Gas Giant
Semi-Major Axis: 1.28 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 288.2
Radius: 12.8
Gravity: 1.76 G
Time & Orbit
Eccentricity (e): 0.164
Orbit Range: 1.07 AU - 1.49 AU
Year: 935 Days
Day: 5.4 Hours
Environment
Temp: -169 °C
Axial Tilt: 127.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (42)
Outer Limit: 53,363,147 km
- M1: 187,745 km (0.114 R)
- M2: 268,229 km (0.093 R)
- M3: 388,206 km (0.116 R)
- M4: 471,532 km (0.091 R)
- M5: 592,408 km (0.032 R)
- M6: 735,274 km (0.102 R)
- M7: 836,102 km (0.071 R)
- M8: 937,081 km (0.055 R)
- M9: 1,080,545 km (0.115 R)
- M10: 1,348,774 km (0.1 R)
- M11: 1,433,148 km (0.056 R)
- M12: 1,575,565 km (0.119 R)
- M13: 1,762,263 km (0.099 R)
- M14: 1,848,431 km (0.106 R)
- M15: 1,970,204 km (0.063 R)
- M16: 2,101,850 km (0.098 R)
- M17: 2,214,946 km (0.094 R)
- M18: 2,604,649 km (0.081 R)
- M19: 2,734,350 km (0.092 R)
- M20: 3,088,149 km (0.045 R)
- M21: 3,225,779 km (0.102 R)
- M22: 3,431,925 km (0.078 R)
- M23: 3,515,700 km (0.096 R)
- M24: 3,770,914 km (0.112 R)
- M25: 4,120,823 km (0.12 R)
- M26: 4,272,814 km (0.112 R)
- M27: 4,426,751 km (0.052 R)
- M28: 4,573,207 km (0.117 R)
- M29: 4,684,209 km (0.051 R)
- M30: 4,767,983 km (0.12 R)
- M31: 4,918,329 km (0.12 R)
- M32: 5,041,598 km (0.118 R)
- M33: 5,156,339 km (0.097 R)
- M34: 5,310,575 km (0.1 R)
- M35: 5,545,144 km (0.086 R)
- M36: 5,853,017 km (0.07 R)
- M37: 6,156,401 km (0.109 R)
- M38: 6,413,111 km (0.087 R)
- M39: 6,747,014 km (0.05 R)
- M40: 6,969,166 km (0.089 R)
- M41: 7,097,372 km (0.069 R)
- M42: 7,280,180 km (0.031 R)
Planet 4 - Gas Giant
Semi-Major Axis: 1.29 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 987.6
Radius: 9.7
Gravity: 10.5 G
Time & Orbit
Eccentricity (e): 0.081
Orbit Range: 1.19 AU - 1.39 AU
Year: 946 Days
Day: 12.1 Hours
Environment
Temp: -174 °C
Axial Tilt: 168.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (61)
Outer Limit: 53,363,147 km
- M1: 127,158 km (0.098 R)
- M2: 241,301 km (0.045 R)
- M3: 396,285 km (0.096 R)
- M4: 660,026 km (0.082 R)
- M5: 734,675 km (0.053 R)
- M6: 805,884 km (0.033 R)
- M7: 893,398 km (0.087 R)
- M8: 1,137,841 km (0.09 R)
- M9: 1,213,987 km (0.077 R)
- M10: 1,403,826 km (0.05 R)
- M11: 1,485,956 km (0.097 R)
- M12: 1,975,589 km (0.068 R)
- M13: 2,077,615 km (0.029 R)
- M14: 2,143,289 km (0.072 R)
- M15: 2,433,509 km (0.115 R)
- M16: 2,563,060 km (0.051 R)
- M17: 2,997,792 km (0.056 R)
- M18: 3,180,451 km (0.088 R)
- M19: 3,556,689 km (0.059 R)
- M20: 3,624,457 km (0.102 R)
- M21: 3,900,465 km (0.114 R)
- M22: 4,183,355 km (0.094 R)
- M23: 4,266,980 km (0.095 R)
- M24: 4,681,965 km (0.082 R)
- M25: 4,756,464 km (0.069 R)
- M26: 4,995,223 km (0.104 R)
- M27: 5,058,802 km (0.098 R)
- M28: 5,160,977 km (0.112 R)
- M29: 5,315,512 km (0.106 R)
- M30: 5,419,332 km (0.035 R)
- M31: 5,589,724 km (0.103 R)
- M32: 5,748,448 km (0.109 R)
- M33: 5,815,019 km (0.11 R)
- M34: 6,070,532 km (0.085 R)
- M35: 6,138,300 km (0.047 R)
- M36: 6,261,120 km (0.089 R)
- M37: 6,343,399 km (0.1 R)
- M38: 6,412,214 km (0.117 R)
- M39: 6,481,328 km (0.079 R)
- M40: 6,858,913 km (0.059 R)
- M41: 7,071,791 km (0.107 R)
- M42: 7,200,445 km (0.063 R)
- M43: 7,416,913 km (0.097 R)
- M44: 7,752,760 km (0.111 R)
- M45: 8,063,924 km (0.104 R)
- M46: 8,774,962 km (0.079 R)
- M47: 8,898,081 km (0.116 R)
- M48: 9,130,257 km (0.067 R)
- M49: 9,208,198 km (0.06 R)
- M50: 9,333,262 km (0.111 R)
- M51: 9,443,066 km (0.105 R)
- M52: 9,664,172 km (0.104 R)
- M53: 9,855,059 km (0.093 R)
- M54: 9,998,972 km (0.104 R)
- M55: 10,240,573 km (0.09 R)
- M56: 10,305,349 km (0.093 R)
- M57: 10,370,124 km (0.07 R)
- M58: 10,581,955 km (0.109 R)
- M59: 10,828,043 km (0.076 R)
- M60: 10,910,472 km (0.107 R)
- M61: 11,225,824 km (0.119 R)
Planet 5 - Gas Giant
Semi-Major Axis: 2.05 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 975.8
Radius: 11.2
Gravity: 7.78 G
Time & Orbit
Eccentricity (e): 0.152
Orbit Range: 1.74 AU - 2.36 AU
Year: 1895 Days
Day: 12 Hours
Environment
Temp: -191 °C
Axial Tilt: 22.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (67)
Outer Limit: 53,363,147 km
- M1: 171,738 km (0.104 R)
- M2: 330,761 km (0.076 R)
- M3: 411,843 km (0.105 R)
- M4: 509,231 km (0.12 R)
- M5: 584,628 km (0.071 R)
- M6: 854,952 km (0.119 R)
- M7: 947,852 km (0.05 R)
- M8: 1,074,113 km (0.087 R)
- M9: 1,216,679 km (0.086 R)
- M10: 1,365,829 km (0.098 R)
- M11: 1,453,942 km (0.109 R)
- M12: 1,555,519 km (0.096 R)
- M13: 1,694,794 km (0.046 R)
- M14: 1,826,141 km (0.104 R)
- M15: 1,936,395 km (0.034 R)
- M16: 2,176,350 km (0.091 R)
- M17: 2,267,156 km (0.096 R)
- M18: 2,412,714 km (0.116 R)
- M19: 2,561,415 km (0.094 R)
- M20: 2,713,257 km (0.08 R)
- M21: 2,910,726 km (0.08 R)
- M22: 2,982,533 km (0.112 R)
- M23: 3,113,132 km (0.1 R)
- M24: 3,201,394 km (0.077 R)
- M25: 3,440,601 km (0.099 R)
- M26: 3,547,265 km (0.081 R)
- M27: 3,685,942 km (0.113 R)
- M28: 4,455,922 km (0.045 R)
- M29: 4,605,819 km (0.114 R)
- M30: 4,774,266 km (0.069 R)
- M31: 4,979,216 km (0.093 R)
- M32: 5,169,803 km (0.092 R)
- M33: 5,274,671 km (0.099 R)
- M34: 5,397,940 km (0.063 R)
- M35: 5,486,652 km (0.12 R)
- M36: 5,701,474 km (0.112 R)
- M37: 5,937,390 km (0.036 R)
- M38: 6,028,944 km (0.066 R)
- M39: 6,232,098 km (0.102 R)
- M40: 6,418,796 km (0.076 R)
- M41: 6,512,893 km (0.108 R)
- M42: 7,009,408 km (0.045 R)
- M43: 7,419,456 km (0.104 R)
- M44: 7,557,834 km (0.09 R)
- M45: 8,059,286 km (0.086 R)
- M46: 8,488,782 km (0.094 R)
- M47: 9,584,287 km (0.114 R)
- M48: 9,930,307 km (0.056 R)
- M49: 10,390,769 km (0.115 R)
- M50: 10,903,142 km (0.058 R)
- M51: 11,423,742 km (0.099 R)
- M52: 11,698,553 km (0.074 R)
- M53: 11,813,744 km (0.099 R)
- M54: 11,929,383 km (0.094 R)
- M55: 12,843,576 km (0.107 R)
- M56: 12,986,142 km (0.095 R)
- M57: 13,537,859 km (0.083 R)
- M58: 13,950,600 km (0.05 R)
- M59: 14,048,437 km (0.062 R)
- M60: 14,490,947 km (0.083 R)
- M61: 14,763,664 km (0.117 R)
- M62: 15,163,390 km (0.114 R)
- M63: 15,389,881 km (0.113 R)
- M64: 15,846,005 km (0.098 R)
- M65: 16,255,305 km (0.119 R)
- M66: 17,188,945 km (0.11 R)
- M67: 17,477,669 km (0.077 R)
Planet 6 - Gas Giant
Semi-Major Axis: 2.53 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 180.1
Radius: 11.3
Gravity: 1.41 G
Time & Orbit
Eccentricity (e): 0.19
Orbit Range: 2.05 AU - 3.01 AU
Year: 2598 Days
Day: 11.4 Hours
Environment
Temp: -199 °C
Axial Tilt: 34.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (65)
Outer Limit: 53,363,147 km
- M1: 228,586 km (0.065 R)
- M2: 299,944 km (0.117 R)
- M3: 430,842 km (0.079 R)
- M4: 622,626 km (0.098 R)
- M5: 774,319 km (0.072 R)
- M6: 880,383 km (0.083 R)
- M7: 1,076,805 km (0.069 R)
- M8: 1,221,467 km (0.112 R)
- M9: 1,296,415 km (0.076 R)
- M10: 1,407,566 km (0.11 R)
- M11: 1,630,617 km (0.101 R)
- M12: 1,808,040 km (0.069 R)
- M13: 1,913,656 km (0.114 R)
- M14: 2,121,447 km (0.116 R)
- M15: 2,420,643 km (0.079 R)
- M16: 2,624,096 km (0.083 R)
- M17: 2,810,944 km (0.114 R)
- M18: 2,889,184 km (0.118 R)
- M19: 3,059,426 km (0.101 R)
- M20: 3,614,434 km (0.071 R)
- M21: 3,947,439 km (0.106 R)
- M22: 4,022,836 km (0.08 R)
- M23: 4,290,617 km (0.091 R)
- M24: 4,420,168 km (0.079 R)
- M25: 4,498,408 km (0.115 R)
- M26: 4,603,725 km (0.099 R)
- M27: 4,683,161 km (0.091 R)
- M28: 4,830,066 km (0.114 R)
- M29: 4,951,390 km (0.111 R)
- M30: 5,142,128 km (0.056 R)
- M31: 5,335,408 km (0.067 R)
- M32: 5,629,817 km (0.061 R)
- M33: 5,700,726 km (0.082 R)
- M34: 5,886,377 km (0.063 R)
- M35: 6,146,977 km (0.119 R)
- M36: 6,219,980 km (0.086 R)
- M37: 6,307,944 km (0.089 R)
- M38: 6,529,947 km (0.066 R)
- M39: 6,694,355 km (0.088 R)
- M40: 6,799,672 km (0.088 R)
- M41: 7,088,396 km (0.082 R)
- M42: 7,164,990 km (0.12 R)
- M43: 7,257,442 km (0.089 R)
- M44: 7,583,864 km (0.063 R)
- M45: 7,883,359 km (0.119 R)
- M46: 8,138,573 km (0.081 R)
- M47: 8,251,071 km (0.087 R)
- M48: 8,412,786 km (0.104 R)
- M49: 8,772,120 km (0.109 R)
- M50: 8,904,065 km (0.069 R)
- M51: 9,020,153 km (0.047 R)
- M52: 9,404,769 km (0.111 R)
- M53: 9,522,952 km (0.06 R)
- M54: 9,675,541 km (0.093 R)
- M55: 9,983,414 km (0.06 R)
- M56: 10,555,925 km (0.083 R)
- M57: 10,872,773 km (0.119 R)
- M58: 11,425,837 km (0.03 R)
- M59: 11,515,894 km (0.113 R)
- M60: 11,733,111 km (0.113 R)
- M61: 11,878,520 km (0.046 R)
- M62: 11,969,774 km (0.101 R)
- M63: 12,097,980 km (0.025 R)
- M64: 12,245,035 km (0.12 R)
- M65: 12,466,589 km (0.085 R)
Planet 7 - Ice Giant
Semi-Major Axis: 9.46 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 267.8
Radius: 3.4
Gravity: 23.17 G
Time & Orbit
Eccentricity (e): 0.044
Orbit Range: 9.04 AU - 9.88 AU
Year: 18787 Days
Day: 23.7 Hours
Environment
Temp: -223 °C
Axial Tilt: 39.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (98)
Outer Limit: 53,363,147 km
- M1: 55,800 km (0.097 R)
- M2: 103,821 km (0.11 R)
- M3: 228,286 km (0.074 R)
- M4: 319,391 km (0.111 R)
- M5: 406,457 km (0.085 R)
- M6: 484,996 km (0.12 R)
- M7: 534,364 km (0.057 R)
- M8: 692,937 km (0.103 R)
- M9: 1,363,585 km (0.118 R)
- M10: 1,410,558 km (0.038 R)
- M11: 1,856,510 km (0.082 R)
- M12: 1,987,557 km (0.062 R)
- M13: 2,286,603 km (0.114 R)
- M14: 2,398,802 km (0.108 R)
- M15: 2,427,076 km (0.061 R)
- M16: 3,109,093 km (0.104 R)
- M17: 3,359,220 km (0.116 R)
- M18: 4,216,416 km (0.114 R)
- M19: 4,740,158 km (0.088 R)
- M20: 5,885,479 km (0.078 R)
- M21: 6,233,294 km (0.105 R)
- M22: 6,429,417 km (0.117 R)
- M23: 6,787,555 km (0.087 R)
- M24: 7,233,955 km (0.055 R)
- M25: 8,155,029 km (0.065 R)
- M26: 8,197,664 km (0.111 R)
- M27: 9,156,586 km (0.073 R)
- M28: 9,201,017 km (0.115 R)
- M29: 9,876,003 km (0.098 R)
- M30: 10,659,895 km (0.114 R)
- M31: 10,941,439 km (0.07 R)
- M32: 12,237,854 km (0.091 R)
- M33: 12,335,840 km (0.107 R)
- M34: 12,483,344 km (0.116 R)
- M35: 12,680,813 km (0.045 R)
- M36: 12,829,513 km (0.116 R)
- M37: 13,279,354 km (0.06 R)
- M38: 13,734,431 km (0.091 R)
- M39: 13,887,170 km (0.091 R)
- M40: 13,989,346 km (0.071 R)
- M41: 14,452,201 km (0.088 R)
- M42: 15,129,581 km (0.103 R)
- M43: 15,817,432 km (0.111 R)
- M44: 16,731,923 km (0.109 R)
- M45: 17,332,858 km (0.092 R)
- M46: 19,405,387 km (0.095 R)
- M47: 20,615,933 km (0.12 R)
- M48: 21,910,104 km (0.114 R)
- M49: 22,029,034 km (0.111 R)
- M50: 22,387,172 km (0.092 R)
- M51: 22,928,118 km (0.083 R)
- M52: 23,412,366 km (0.054 R)
- M53: 23,533,989 km (0.111 R)
- M54: 23,961,241 km (0.117 R)
- M55: 25,320,786 km (0.113 R)
- M56: 25,445,700 km (0.09 R)
- M57: 26,578,306 km (0.073 R)
- M58: 26,705,165 km (0.109 R)
- M59: 27,087,088 km (0.091 R)
- M60: 27,342,601 km (0.063 R)
- M61: 27,470,657 km (0.096 R)
- M62: 28,178,554 km (0.056 R)
- M63: 28,307,956 km (0.034 R)
- M64: 29,023,034 km (0.095 R)
- M65: 31,136,553 km (0.077 R)
- M66: 31,337,164 km (0.07 R)
- M67: 31,404,183 km (0.117 R)
- M68: 33,367,506 km (0.065 R)
- M69: 33,847,416 km (0.068 R)
- M70: 33,984,896 km (0.075 R)
- M71: 34,053,711 km (0.055 R)
- M72: 34,467,649 km (0.087 R)
- M73: 34,675,141 km (0.083 R)
- M74: 36,350,787 km (0.074 R)
- M75: 36,985,979 km (0.075 R)
- M76: 37,127,499 km (0.11 R)
- M77: 38,124,120 km (0.11 R)
- M78: 38,338,793 km (0.061 R)
- M79: 39,852,723 km (0.062 R)
- M80: 40,143,242 km (0.091 R)
- M81: 40,945,984 km (0.119 R)
- M82: 42,197,071 km (0.053 R)
- M83: 42,493,126 km (0.056 R)
- M84: 43,311,276 km (0.066 R)
- M85: 44,962,837 km (0.096 R)
- M86: 45,644,405 km (0.117 R)
- M87: 46,405,559 km (0.079 R)
- M88: 48,947,526 km (0.064 R)
- M89: 49,025,167 km (0.085 R)
- M90: 49,492,511 km (0.117 R)
- M91: 49,648,541 km (0.084 R)
- M92: 49,961,201 km (0.058 R)
- M93: 50,667,004 km (0.053 R)
- M94: 50,745,692 km (0.073 R)
- M95: 50,824,381 km (0.088 R)
- M96: 52,485,815 km (0.049 R)
- M97: 52,565,401 km (0.074 R)
- M98: 52,804,308 km (0.09 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: 546 - 20,225 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.