Star System Generated (Seed: 1766868467)
Star Details
Spectral Class: K8V
Temperature: 3,914 K
Mass: 0.65 sol
Luminosity: 0.22 lux
Habitable Zone (HZ)
Inner Boundary: 0.45 AU
Outer Boundary: 0.64 AU
Physical Limits
Snow Line: 2.25 AU
Max System Radius: 16.1 AU
Planetary System (9 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 0.52 AU
Status: HZ
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.29
Radius: 1.79
Gravity: 1.34 G
Time & Orbit
Eccentricity (e): 0.102
Orbit Range: 0.47 AU - 0.57 AU
Year: 170 Days
Day: 20.9 Hours
Environment
Temp: 26 °C
Axial Tilt: 43.1 °
Atmosphere: Nâ‚‚, Oâ‚‚
Biome: Arid/Tundra
Planet 2 - Terrestrial
Semi-Major Axis: 0.66 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.93
Radius: 1.73
Gravity: 1.31 G
Time & Orbit
Eccentricity (e): 0.178
Orbit Range: 0.54 AU - 0.78 AU
Year: 243 Days
Day: 30.4 Hours
Environment
Temp: -38 °C
Axial Tilt: 5.2 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (2)
Outer Limit: 52,408,075 km
- M1: 569,968 km (0.1 R)
- M2: 697,425 km (0.083 R)
Planet 3 - Terrestrial
Semi-Major Axis: 0.91 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.87
Radius: 1.28
Gravity: 1.14 G
Time & Orbit
Eccentricity (e): 0.124
Orbit Range: 0.8 AU - 1.02 AU
Year: 393 Days
Day: 33.2 Hours
Environment
Temp: -71 °C
Axial Tilt: 34.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 4 - Terrestrial
Semi-Major Axis: 1.37 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.75
Radius: 1.86
Gravity: 1.37 G
Time & Orbit
Eccentricity (e): 0.065
Orbit Range: 1.28 AU - 1.46 AU
Year: 726 Days
Day: 19.8 Hours
Environment
Temp: -91 °C
Axial Tilt: 34.1 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 5 - Gas Giant
Semi-Major Axis: 2.41 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 379.7
Radius: 13.4
Gravity: 2.11 G
Time & Orbit
Eccentricity (e): 0.224
Orbit Range: 1.87 AU - 2.95 AU
Year: 1695 Days
Day: 6.1 Hours
Environment
Temp: -142 °C
Axial Tilt: 28.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (61)
Outer Limit: 52,408,075 km
- M1: 166,951 km (0.095 R)
- M2: 268,977 km (0.027 R)
- M3: 406,009 km (0.073 R)
- M4: 493,075 km (0.081 R)
- M5: 582,833 km (0.108 R)
- M6: 679,623 km (0.082 R)
- M7: 1,029,832 km (0.04 R)
- M8: 1,294,770 km (0.063 R)
- M9: 1,393,803 km (0.114 R)
- M10: 1,495,530 km (0.062 R)
- M11: 1,600,099 km (0.107 R)
- M12: 1,689,110 km (0.103 R)
- M13: 1,816,567 km (0.117 R)
- M14: 1,909,916 km (0.069 R)
- M15: 2,309,342 km (0.089 R)
- M16: 2,462,231 km (0.106 R)
- M17: 2,789,103 km (0.104 R)
- M18: 2,886,790 km (0.098 R)
- M19: 3,018,735 km (0.09 R)
- M20: 3,231,912 km (0.057 R)
- M21: 3,450,026 km (0.111 R)
- M22: 3,555,193 km (0.093 R)
- M23: 3,864,861 km (0.081 R)
- M24: 4,220,904 km (0.117 R)
- M25: 4,346,117 km (0.044 R)
- M26: 4,523,540 km (0.113 R)
- M27: 4,651,895 km (0.09 R)
- M28: 4,846,522 km (0.107 R)
- M29: 5,177,134 km (0.106 R)
- M30: 5,528,838 km (0.046 R)
- M31: 5,721,520 km (0.054 R)
- M32: 5,916,446 km (0.079 R)
- M33: 6,071,130 km (0.064 R)
- M34: 6,212,949 km (0.119 R)
- M35: 6,427,772 km (0.108 R)
- M36: 6,514,389 km (0.115 R)
- M37: 6,644,988 km (0.111 R)
- M38: 6,968,269 km (0.117 R)
- M39: 7,206,429 km (0.101 R)
- M40: 7,829,504 km (0.076 R)
- M41: 7,922,105 km (0.062 R)
- M42: 8,170,886 km (0.106 R)
- M43: 8,374,938 km (0.111 R)
- M44: 8,501,497 km (0.037 R)
- M45: 8,628,506 km (0.119 R)
- M46: 8,820,290 km (0.081 R)
- M47: 8,932,938 km (0.068 R)
- M48: 9,029,727 km (0.119 R)
- M49: 9,208,347 km (0.113 R)
- M50: 9,404,321 km (0.03 R)
- M51: 9,667,912 km (0.055 R)
- M52: 9,800,755 km (0.115 R)
- M53: 9,934,047 km (0.099 R)
- M54: 10,456,442 km (0.036 R)
- M55: 10,695,350 km (0.077 R)
- M56: 11,213,408 km (0.117 R)
- M57: 11,317,977 km (0.072 R)
- M58: 11,528,162 km (0.088 R)
- M59: 11,616,125 km (0.099 R)
- M60: 11,757,345 km (0.097 R)
- M61: 11,916,966 km (0.047 R)
Planet 6 - Gas Giant
Semi-Major Axis: 3.84 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 372
Radius: 14.1
Gravity: 1.87 G
Time & Orbit
Eccentricity (e): 0.177
Orbit Range: 3.16 AU - 4.52 AU
Year: 3409 Days
Day: 11.6 Hours
Environment
Temp: -166 °C
Axial Tilt: 1.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (66)
Outer Limit: 52,408,075 km
- M1: 176,974 km (0.119 R)
- M2: 293,960 km (0.104 R)
- M3: 412,591 km (0.051 R)
- M4: 571,464 km (0.063 R)
- M5: 685,906 km (0.096 R)
- M6: 846,425 km (0.096 R)
- M7: 971,189 km (0.088 R)
- M8: 1,123,779 km (0.092 R)
- M9: 1,219,372 km (0.105 R)
- M10: 1,329,177 km (0.056 R)
- M11: 1,419,684 km (0.085 R)
- M12: 1,643,482 km (0.087 R)
- M13: 1,816,118 km (0.082 R)
- M14: 1,904,830 km (0.027 R)
- M15: 2,206,868 km (0.044 R)
- M16: 2,329,388 km (0.066 R)
- M17: 2,426,328 km (0.096 R)
- M18: 2,524,763 km (0.1 R)
- M19: 2,784,016 km (0.032 R)
- M20: 3,776,149 km (0.095 R)
- M21: 4,141,019 km (0.116 R)
- M22: 4,310,812 km (0.099 R)
- M23: 4,500,203 km (0.097 R)
- M24: 4,941,068 km (0.074 R)
- M25: 5,285,442 km (0.059 R)
- M26: 5,395,846 km (0.105 R)
- M27: 5,488,447 km (0.045 R)
- M28: 5,694,144 km (0.061 R)
- M29: 6,268,001 km (0.118 R)
- M30: 6,483,123 km (0.104 R)
- M31: 6,720,684 km (0.086 R)
- M32: 7,429,928 km (0.082 R)
- M33: 8,505,985 km (0.106 R)
- M34: 8,985,297 km (0.08 R)
- M35: 9,095,551 km (0.042 R)
- M36: 9,383,975 km (0.071 R)
- M37: 9,540,754 km (0.065 R)
- M38: 9,879,294 km (0.115 R)
- M39: 10,038,765 km (0.115 R)
- M40: 10,498,779 km (0.114 R)
- M41: 10,708,216 km (0.101 R)
- M42: 10,801,714 km (0.106 R)
- M43: 10,942,486 km (0.028 R)
- M44: 11,154,616 km (0.117 R)
- M45: 11,320,669 km (0.101 R)
- M46: 11,872,087 km (0.084 R)
- M47: 11,993,261 km (0.096 R)
- M48: 12,114,585 km (0.037 R)
- M49: 12,358,878 km (0.093 R)
- M50: 12,752,919 km (0.119 R)
- M51: 12,976,419 km (0.116 R)
- M52: 13,756,123 km (0.066 R)
- M53: 14,654,757 km (0.117 R)
- M54: 14,758,728 km (0.119 R)
- M55: 14,862,848 km (0.101 R)
- M56: 15,572,390 km (0.081 R)
- M57: 15,971,368 km (0.108 R)
- M58: 16,562,728 km (0.1 R)
- M59: 16,888,253 km (0.099 R)
- M60: 17,133,893 km (0.093 R)
- M61: 17,435,632 km (0.095 R)
- M62: 17,961,020 km (0.088 R)
- M63: 18,127,971 km (0.1 R)
- M64: 18,295,520 km (0.085 R)
- M65: 18,632,116 km (0.093 R)
- M66: 18,914,108 km (0.106 R)
Planet 7 - Gas Giant
Semi-Major Axis: 5.12 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 854.8
Radius: 12.5
Gravity: 5.47 G
Time & Orbit
Eccentricity (e): 0.104
Orbit Range: 4.59 AU - 5.65 AU
Year: 5249 Days
Day: 5.7 Hours
Environment
Temp: -170 °C
Axial Tilt: 15.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (81)
Outer Limit: 52,408,075 km
- M1: 170,990 km (0.117 R)
- M2: 249,978 km (0.068 R)
- M3: 383,719 km (0.118 R)
- M4: 869,612 km (0.062 R)
- M5: 969,095 km (0.102 R)
- M6: 1,228,199 km (0.087 R)
- M7: 1,758,373 km (0.081 R)
- M8: 1,906,176 km (0.092 R)
- M9: 2,155,705 km (0.054 R)
- M10: 2,354,970 km (0.089 R)
- M11: 2,518,779 km (0.095 R)
- M12: 2,989,265 km (0.106 R)
- M13: 3,487,426 km (0.086 R)
- M14: 3,627,748 km (0.102 R)
- M15: 3,770,166 km (0.038 R)
- M16: 4,036,001 km (0.099 R)
- M17: 4,509,927 km (0.108 R)
- M18: 4,870,458 km (0.09 R)
- M19: 5,107,421 km (0.109 R)
- M20: 5,240,563 km (0.05 R)
- M21: 5,952,050 km (0.037 R)
- M22: 6,319,313 km (0.12 R)
- M23: 6,869,385 km (0.107 R)
- M24: 8,170,737 km (0.065 R)
- M25: 8,737,862 km (0.11 R)
- M26: 9,546,588 km (0.103 R)
- M27: 9,645,323 km (0.048 R)
- M28: 9,843,689 km (0.115 R)
- M29: 10,043,552 km (0.065 R)
- M30: 10,480,976 km (0.115 R)
- M31: 11,724,733 km (0.073 R)
- M32: 12,149,741 km (0.08 R)
- M33: 12,615,738 km (0.036 R)
- M34: 13,307,628 km (0.088 R)
- M35: 13,454,832 km (0.082 R)
- M36: 14,011,785 km (0.066 R)
- M37: 14,576,218 km (0.078 R)
- M38: 14,690,062 km (0.12 R)
- M39: 14,956,795 km (0.114 R)
- M40: 15,340,514 km (0.04 R)
- M41: 16,000,390 km (0.107 R)
- M42: 16,392,935 km (0.112 R)
- M43: 16,908,000 km (0.084 R)
- M44: 17,347,967 km (0.089 R)
- M45: 17,751,134 km (0.053 R)
- M46: 18,443,772 km (0.099 R)
- M47: 18,772,887 km (0.104 R)
- M48: 18,938,043 km (0.097 R)
- M49: 19,270,001 km (0.078 R)
- M50: 20,066,011 km (0.073 R)
- M51: 20,489,373 km (0.103 R)
- M52: 20,744,886 km (0.114 R)
- M53: 22,212,142 km (0.045 R)
- M54: 22,650,015 km (0.109 R)
- M55: 23,267,854 km (0.115 R)
- M56: 23,801,919 km (0.057 R)
- M57: 24,025,568 km (0.096 R)
- M58: 24,655,674 km (0.066 R)
- M59: 24,836,837 km (0.091 R)
- M60: 25,018,299 km (0.086 R)
- M61: 25,473,825 km (0.096 R)
- M62: 25,565,379 km (0.097 R)
- M63: 26,116,347 km (0.046 R)
- M64: 26,300,951 km (0.109 R)
- M65: 26,439,628 km (0.069 R)
- M66: 26,857,156 km (0.094 R)
- M67: 26,950,356 km (0.066 R)
- M68: 27,323,752 km (0.069 R)
- M69: 28,123,053 km (0.112 R)
- M70: 28,359,568 km (0.062 R)
- M71: 28,454,413 km (0.054 R)
- M72: 29,744,545 km (0.081 R)
- M73: 30,130,507 km (0.072 R)
- M74: 30,421,026 km (0.028 R)
- M75: 30,761,212 km (0.116 R)
- M76: 31,298,268 km (0.03 R)
- M77: 31,789,248 km (0.102 R)
- M78: 32,282,772 km (0.118 R)
- M79: 32,679,356 km (0.044 R)
- M80: 32,878,321 km (0.114 R)
- M81: 33,027,769 km (0.111 R)
Planet 8 - Gas Giant
Semi-Major Axis: 7.07 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 589.9
Radius: 10.1
Gravity: 5.78 G
Time & Orbit
Eccentricity (e): 0.173
Orbit Range: 5.85 AU - 8.29 AU
Year: 8517 Days
Day: 13.7 Hours
Environment
Temp: -182 °C
Axial Tilt: 32.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (86)
Outer Limit: 52,408,075 km
- M1: 149,598 km (0.054 R)
- M2: 296,802 km (0.1 R)
- M3: 515,514 km (0.074 R)
- M4: 1,210,097 km (0.084 R)
- M5: 1,575,415 km (0.092 R)
- M6: 1,844,841 km (0.117 R)
- M7: 2,498,733 km (0.031 R)
- M8: 2,618,262 km (0.101 R)
- M9: 2,739,885 km (0.112 R)
- M10: 2,838,470 km (0.119 R)
- M11: 3,039,380 km (0.091 R)
- M12: 3,193,167 km (0.079 R)
- M13: 5,109,515 km (0.052 R)
- M14: 5,698,033 km (0.079 R)
- M15: 6,670,569 km (0.055 R)
- M16: 6,938,499 km (0.092 R)
- M17: 7,869,147 km (0.103 R)
- M18: 7,975,062 km (0.037 R)
- M19: 8,152,486 km (0.082 R)
- M20: 8,367,159 km (0.1 R)
- M21: 8,439,115 km (0.042 R)
- M22: 8,765,538 km (0.078 R)
- M23: 8,875,342 km (0.117 R)
- M24: 9,022,397 km (0.056 R)
- M25: 11,483,133 km (0.091 R)
- M26: 11,723,985 km (0.077 R)
- M27: 12,703,851 km (0.089 R)
- M28: 14,567,541 km (0.099 R)
- M29: 14,697,692 km (0.098 R)
- M30: 14,871,973 km (0.107 R)
- M31: 15,752,955 km (0.08 R)
- M32: 16,065,465 km (0.101 R)
- M33: 16,244,833 km (0.091 R)
- M34: 16,605,663 km (0.042 R)
- M35: 16,832,603 km (0.071 R)
- M36: 17,197,771 km (0.092 R)
- M37: 17,473,330 km (0.09 R)
- M38: 17,796,761 km (0.102 R)
- M39: 18,262,160 km (0.086 R)
- M40: 18,402,632 km (0.12 R)
- M41: 18,873,267 km (0.081 R)
- M42: 19,015,236 km (0.111 R)
- M43: 19,205,075 km (0.088 R)
- M44: 19,970,717 km (0.115 R)
- M45: 20,405,748 km (0.06 R)
- M46: 20,648,844 km (0.043 R)
- M47: 20,746,382 km (0.096 R)
- M48: 21,088,812 km (0.07 R)
- M49: 22,027,838 km (0.119 R)
- M50: 22,327,183 km (0.081 R)
- M51: 23,436,152 km (0.065 R)
- M52: 23,741,780 km (0.025 R)
- M53: 23,895,118 km (0.104 R)
- M54: 24,100,067 km (0.095 R)
- M55: 24,460,000 km (0.055 R)
- M56: 24,563,222 km (0.054 R)
- M57: 25,970,340 km (0.072 R)
- M58: 26,180,974 km (0.107 R)
- M59: 26,286,590 km (0.079 R)
- M60: 26,816,466 km (0.105 R)
- M61: 26,976,236 km (0.104 R)
- M62: 27,457,044 km (0.072 R)
- M63: 27,833,133 km (0.077 R)
- M64: 27,994,698 km (0.118 R)
- M65: 28,753,309 km (0.098 R)
- M66: 29,025,876 km (0.041 R)
- M67: 29,518,652 km (0.081 R)
- M68: 29,738,561 km (0.107 R)
- M69: 29,958,918 km (0.111 R)
- M70: 31,348,982 km (0.117 R)
- M71: 34,654,048 km (0.09 R)
- M72: 34,769,986 km (0.083 R)
- M73: 34,944,118 km (0.109 R)
- M74: 35,293,279 km (0.076 R)
- M75: 35,468,309 km (0.101 R)
- M76: 35,702,130 km (0.11 R)
- M77: 35,877,758 km (0.059 R)
- M78: 36,053,835 km (0.104 R)
- M79: 36,465,528 km (0.119 R)
- M80: 37,174,921 km (0.086 R)
- M81: 37,531,413 km (0.099 R)
- M82: 38,607,470 km (0.067 R)
- M83: 39,511,939 km (0.104 R)
- M84: 39,875,761 km (0.119 R)
- M85: 40,240,630 km (0.116 R)
- M86: 40,484,475 km (0.058 R)
Planet 9 - Ice Giant
Semi-Major Axis: 11.42 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 292.9
Radius: 4.8
Gravity: 12.71 G
Time & Orbit
Eccentricity (e): 0.095
Orbit Range: 10.34 AU - 12.5 AU
Year: 17484 Days
Day: 16.6 Hours
Environment
Temp: -217 °C
Axial Tilt: 21.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (94)
Outer Limit: 52,408,075 km
- M1: 68,366 km (0.055 R)
- M2: 196,721 km (0.067 R)
- M3: 305,030 km (0.111 R)
- M4: 526,435 km (0.102 R)
- M5: 559,346 km (0.098 R)
- M6: 644,916 km (0.116 R)
- M7: 680,371 km (0.091 R)
- M8: 753,375 km (0.076 R)
- M9: 1,029,233 km (0.102 R)
- M10: 1,070,971 km (0.04 R)
- M11: 1,288,935 km (0.053 R)
- M12: 1,568,384 km (0.092 R)
- M13: 1,917,695 km (0.047 R)
- M14: 2,021,815 km (0.113 R)
- M15: 2,317,869 km (0.025 R)
- M16: 2,627,537 km (0.048 R)
- M17: 2,801,819 km (0.108 R)
- M18: 2,979,990 km (0.076 R)
- M19: 3,040,278 km (0.114 R)
- M20: 3,696,563 km (0.086 R)
- M21: 4,567,373 km (0.066 R)
- M22: 4,671,792 km (0.098 R)
- M23: 4,777,109 km (0.111 R)
- M24: 6,023,259 km (0.096 R)
- M25: 6,176,148 km (0.071 R)
- M26: 6,407,875 km (0.102 R)
- M27: 6,840,213 km (0.094 R)
- M28: 6,959,742 km (0.116 R)
- M29: 7,898,917 km (0.059 R)
- M30: 9,138,784 km (0.091 R)
- M31: 9,270,430 km (0.059 R)
- M32: 9,402,825 km (0.118 R)
- M33: 10,575,522 km (0.101 R)
- M34: 10,759,976 km (0.093 R)
- M35: 10,899,102 km (0.064 R)
- M36: 11,272,798 km (0.083 R)
- M37: 11,793,548 km (0.104 R)
- M38: 12,419,166 km (0.053 R)
- M39: 12,467,636 km (0.072 R)
- M40: 12,565,024 km (0.117 R)
- M41: 12,956,821 km (0.081 R)
- M42: 13,104,773 km (0.106 R)
- M43: 13,352,657 km (0.079 R)
- M44: 13,903,327 km (0.059 R)
- M45: 13,953,741 km (0.099 R)
- M46: 14,820,362 km (0.101 R)
- M47: 16,444,995 km (0.12 R)
- M48: 17,143,018 km (0.036 R)
- M49: 18,567,639 km (0.092 R)
- M50: 19,406,733 km (0.101 R)
- M51: 21,295,706 km (0.086 R)
- M52: 22,468,852 km (0.118 R)
- M53: 22,587,334 km (0.092 R)
- M54: 22,824,895 km (0.085 R)
- M55: 23,422,389 km (0.104 R)
- M56: 23,482,378 km (0.11 R)
- M57: 24,328,204 km (0.097 R)
- M58: 24,877,228 km (0.113 R)
- M59: 24,938,414 km (0.105 R)
- M60: 25,122,569 km (0.076 R)
- M61: 25,245,538 km (0.11 R)
- M62: 26,673,899 km (0.105 R)
- M63: 26,924,924 km (0.102 R)
- M64: 27,302,958 km (0.051 R)
- M65: 27,429,368 km (0.115 R)
- M66: 28,000,682 km (0.118 R)
- M67: 28,383,802 km (0.03 R)
- M68: 28,961,549 km (0.052 R)
- M69: 29,737,962 km (0.12 R)
- M70: 29,933,188 km (0.059 R)
- M71: 30,063,487 km (0.054 R)
- M72: 30,981,270 km (0.076 R)
- M73: 31,974,750 km (0.063 R)
- M74: 32,241,483 km (0.055 R)
- M75: 33,315,745 km (0.053 R)
- M76: 34,060,892 km (0.096 R)
- M77: 35,017,421 km (0.117 R)
- M78: 37,868,906 km (0.116 R)
- M79: 38,788,484 km (0.115 R)
- M80: 39,215,287 km (0.084 R)
- M81: 39,786,900 km (0.088 R)
- M82: 39,930,215 km (0.073 R)
- M83: 40,433,312 km (0.077 R)
- M84: 41,083,166 km (0.109 R)
- M85: 41,736,310 km (0.064 R)
- M86: 42,832,713 km (0.112 R)
- M87: 43,200,275 km (0.116 R)
- M88: 43,716,687 km (0.092 R)
- M89: 43,864,639 km (0.105 R)
- M90: 46,555,157 km (0.055 R)
- M91: 47,539,959 km (0.045 R)
- M92: 49,915,574 km (0.101 R)
- M93: 50,612,550 km (0.112 R)
- M94: 52,172,706 km (0.085 R)
Kuiper Belt
Range: 30 - 56 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 328 - 15,625 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.