Star System Generated (Seed: 1766528634)
Star Details
Spectral Class: G8V
Temperature: 5,360 K
Mass: 0.94 sol
Luminosity: 0.81 lux
Habitable Zone (HZ)
Inner Boundary: 0.86 AU
Outer Boundary: 1.24 AU
Physical Limits
Snow Line: 4.32 AU
Max System Radius: 19.4 AU
Planetary System (10 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 0.51 AU
Status: Inner (Hot)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 0.2
Radius: 0.53
Gravity: 0.71 G
Time & Orbit
Eccentricity (e): 0.025
Orbit Range: 0.5 AU - 0.52 AU
Year: 137 Days
Day: 38.3 Hours
Environment
Temp: 197 °C
Axial Tilt: 39.3 °
Atmosphere: Dense COâ‚‚
Biome: Volcanic/Barren
Satellites (1)
Outer Limit: 49,838,344 km
- M1: 50,115 km (0.101 R)
Planet 2 - Terrestrial
Semi-Major Axis: 0.56 AU
Status: Inner (Hot)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.58
Radius: 1.67
Gravity: 1.28 G
Time & Orbit
Eccentricity (e): 0.128
Orbit Range: 0.49 AU - 0.63 AU
Year: 158 Days
Day: 37 Hours
Environment
Temp: 191 °C
Axial Tilt: 49.2 °
Atmosphere: Dense COâ‚‚
Biome: Volcanic/Barren
Planet 3 - Terrestrial
Semi-Major Axis: 1.58 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.05
Radius: 1.02
Gravity: 1.01 G
Time & Orbit
Eccentricity (e): 0.097
Orbit Range: 1.43 AU - 1.73 AU
Year: 748 Days
Day: 14.1 Hours
Environment
Temp: -53 °C
Axial Tilt: 14.4 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Satellites (1)
Outer Limit: 49,838,344 km
- M1: 186,698 km (0.118 R)
Planet 4 - Terrestrial
Semi-Major Axis: 1.63 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 0.59
Radius: 0.81
Gravity: 0.9 G
Time & Orbit
Eccentricity (e): 0.178
Orbit Range: 1.34 AU - 1.92 AU
Year: 784 Days
Day: 24 Hours
Environment
Temp: -48 °C
Axial Tilt: 37.5 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Planet 5 - Terrestrial
Semi-Major Axis: 1.91 AU
Status: Outer (Cold)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.49
Radius: 1.65
Gravity: 1.28 G
Time & Orbit
Eccentricity (e): 0.236
Orbit Range: 1.46 AU - 2.36 AU
Year: 994 Days
Day: 46.1 Hours
Environment
Temp: -68 °C
Axial Tilt: 21.6 °
Atmosphere: Thin Nâ‚‚/CHâ‚„
Biome: Ice Cap/Desert
Asteroid Belt
Center: 3.24 AU
Composition
Type: Inner (Rocky/Metallic)
A dense region of planetesimals and debris.
Boundary
Planet 6 - Gas Giant
Semi-Major Axis: 4.57 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 344.6
Radius: 9.1
Gravity: 4.16 G
Time & Orbit
Eccentricity (e): 0.039
Orbit Range: 4.39 AU - 4.75 AU
Year: 3680 Days
Day: 7 Hours
Environment
Temp: -142 °C
Axial Tilt: 31.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (64)
Outer Limit: 49,838,344 km
- M1: 119,977 km (0.047 R)
- M2: 219,460 km (0.084 R)
- M3: 683,064 km (0.025 R)
- M4: 747,241 km (0.12 R)
- M5: 804,089 km (0.051 R)
- M6: 892,202 km (0.081 R)
- M7: 1,465,461 km (0.064 R)
- M8: 1,612,067 km (0.103 R)
- M9: 1,906,625 km (0.072 R)
- M10: 2,053,680 km (0.102 R)
- M11: 2,590,287 km (0.098 R)
- M12: 2,678,849 km (0.061 R)
- M13: 2,966,376 km (0.062 R)
- M14: 3,121,659 km (0.105 R)
- M15: 3,391,982 km (0.078 R)
- M16: 3,538,139 km (0.069 R)
- M17: 3,686,391 km (0.059 R)
- M18: 3,836,737 km (0.115 R)
- M19: 4,282,688 km (0.104 R)
- M20: 4,511,872 km (0.094 R)
- M21: 4,672,839 km (0.055 R)
- M22: 5,204,660 km (0.09 R)
- M23: 5,373,556 km (0.116 R)
- M24: 6,087,287 km (0.108 R)
- M25: 6,146,528 km (0.055 R)
- M26: 6,445,275 km (0.112 R)
- M27: 7,015,841 km (0.072 R)
- M28: 7,265,221 km (0.072 R)
- M29: 7,328,052 km (0.086 R)
- M30: 7,517,742 km (0.062 R)
- M31: 7,708,928 km (0.102 R)
- M32: 7,794,348 km (0.105 R)
- M33: 7,944,844 km (0.057 R)
- M34: 8,379,874 km (0.109 R)
- M35: 8,533,960 km (0.063 R)
- M36: 9,024,342 km (0.092 R)
- M37: 9,114,549 km (0.09 R)
- M38: 9,455,333 km (0.117 R)
- M39: 9,754,080 km (0.102 R)
- M40: 9,869,869 km (0.087 R)
- M41: 10,196,292 km (0.1 R)
- M42: 10,907,929 km (0.066 R)
- M43: 11,003,971 km (0.106 R)
- M44: 11,172,867 km (0.118 R)
- M45: 11,537,586 km (0.108 R)
- M46: 12,005,229 km (0.055 R)
- M47: 12,629,950 km (0.114 R)
- M48: 12,730,928 km (0.072 R)
- M49: 13,086,223 km (0.119 R)
- M50: 13,393,497 km (0.09 R)
- M51: 13,806,986 km (0.082 R)
- M52: 14,461,177 km (0.108 R)
- M53: 14,566,793 km (0.099 R)
- M54: 14,646,230 km (0.062 R)
- M55: 15,313,436 km (0.026 R)
- M56: 15,881,609 km (0.084 R)
- M57: 16,291,657 km (0.04 R)
- M58: 16,539,241 km (0.079 R)
- M59: 17,458,221 km (0.091 R)
- M60: 17,937,981 km (0.106 R)
- M61: 18,307,787 km (0.104 R)
- M62: 18,450,803 km (0.06 R)
- M63: 18,508,099 km (0.07 R)
- M64: 19,316,077 km (0.062 R)
Planet 7 - Gas Giant
Semi-Major Axis: 4.96 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 358.3
Radius: 8.6
Gravity: 4.84 G
Time & Orbit
Eccentricity (e): 0.104
Orbit Range: 4.44 AU - 5.48 AU
Year: 4161 Days
Day: 7.3 Hours
Environment
Temp: -137 °C
Axial Tilt: 32.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (65)
Outer Limit: 49,838,344 km
- M1: 125,213 km (0.114 R)
- M2: 265,686 km (0.113 R)
- M3: 573,558 km (0.107 R)
- M4: 1,157,588 km (0.059 R)
- M5: 1,265,299 km (0.066 R)
- M6: 1,742,815 km (0.067 R)
- M7: 1,951,504 km (0.093 R)
- M8: 2,066,096 km (0.096 R)
- M9: 2,287,202 km (0.052 R)
- M10: 2,454,303 km (0.112 R)
- M11: 2,625,443 km (0.039 R)
- M12: 2,736,444 km (0.115 R)
- M13: 2,816,629 km (0.097 R)
- M14: 3,128,839 km (0.09 R)
- M15: 3,331,694 km (0.079 R)
- M16: 3,661,857 km (0.057 R)
- M17: 3,929,936 km (0.073 R)
- M18: 4,093,895 km (0.072 R)
- M19: 4,167,647 km (0.085 R)
- M20: 4,222,998 km (0.069 R)
- M21: 4,561,239 km (0.107 R)
- M22: 4,753,024 km (0.101 R)
- M23: 5,525,846 km (0.06 R)
- M24: 6,681,041 km (0.12 R)
- M25: 6,877,164 km (0.044 R)
- M26: 7,386,694 km (0.032 R)
- M27: 7,566,810 km (0.084 R)
- M28: 7,680,055 km (0.084 R)
- M29: 7,977,306 km (0.113 R)
- M30: 8,046,570 km (0.106 R)
- M31: 8,559,691 km (0.052 R)
- M32: 9,617,498 km (0.108 R)
- M33: 9,789,685 km (0.066 R)
- M34: 10,136,901 km (0.094 R)
- M35: 10,564,003 km (0.11 R)
- M36: 11,177,055 km (0.115 R)
- M37: 11,383,949 km (0.087 R)
- M38: 11,722,938 km (0.114 R)
- M39: 11,854,135 km (0.05 R)
- M40: 12,144,654 km (0.099 R)
- M41: 12,224,240 km (0.084 R)
- M42: 12,571,307 km (0.074 R)
- M43: 12,732,574 km (0.116 R)
- M44: 13,549,378 km (0.089 R)
- M45: 13,742,360 km (0.115 R)
- M46: 14,326,988 km (0.048 R)
- M47: 14,551,684 km (0.067 R)
- M48: 14,976,392 km (0.091 R)
- M49: 15,319,121 km (0.103 R)
- M50: 15,780,032 km (0.115 R)
- M51: 15,983,186 km (0.09 R)
- M52: 16,157,916 km (0.107 R)
- M53: 16,362,716 km (0.109 R)
- M54: 16,597,734 km (0.054 R)
- M55: 16,715,617 km (0.087 R)
- M56: 16,833,800 km (0.086 R)
- M57: 17,669,154 km (0.097 R)
- M58: 18,182,873 km (0.086 R)
- M59: 18,273,978 km (0.075 R)
- M60: 18,395,751 km (0.051 R)
- M61: 19,070,437 km (0.11 R)
- M62: 19,224,972 km (0.097 R)
- M63: 19,690,820 km (0.069 R)
- M64: 20,254,804 km (0.088 R)
- M65: 20,855,888 km (0.066 R)
Planet 8 - Gas Giant
Semi-Major Axis: 5.35 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 841.9
Radius: 12.1
Gravity: 5.75 G
Time & Orbit
Eccentricity (e): 0.072
Orbit Range: 4.96 AU - 5.74 AU
Year: 4662 Days
Day: 5.2 Hours
Environment
Temp: -153 °C
Axial Tilt: 31.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (81)
Outer Limit: 49,838,344 km
- M1: 153,188 km (0.079 R)
- M2: 351,555 km (0.069 R)
- M3: 493,972 km (0.101 R)
- M4: 636,240 km (0.085 R)
- M5: 719,416 km (0.041 R)
- M6: 1,107,323 km (0.103 R)
- M7: 1,411,456 km (0.073 R)
- M8: 1,491,790 km (0.109 R)
- M9: 1,742,366 km (0.075 R)
- M10: 1,829,133 km (0.066 R)
- M11: 2,594,775 km (0.109 R)
- M12: 3,694,768 km (0.077 R)
- M13: 3,784,826 km (0.043 R)
- M14: 3,875,782 km (0.088 R)
- M15: 4,176,174 km (0.063 R)
- M16: 4,293,758 km (0.077 R)
- M17: 4,628,857 km (0.108 R)
- M18: 4,726,246 km (0.115 R)
- M19: 4,923,116 km (0.075 R)
- M20: 5,122,530 km (0.104 R)
- M21: 5,633,108 km (0.1 R)
- M22: 5,789,587 km (0.098 R)
- M23: 6,511,247 km (0.089 R)
- M24: 6,647,980 km (0.103 R)
- M25: 6,868,936 km (0.106 R)
- M26: 7,092,136 km (0.12 R)
- M27: 7,317,879 km (0.106 R)
- M28: 8,156,076 km (0.099 R)
- M29: 8,244,638 km (0.089 R)
- M30: 9,423,619 km (0.066 R)
- M31: 9,609,718 km (0.061 R)
- M32: 11,207,274 km (0.105 R)
- M33: 11,835,884 km (0.063 R)
- M34: 12,171,432 km (0.115 R)
- M35: 12,272,561 km (0.072 R)
- M36: 12,442,055 km (0.086 R)
- M37: 12,543,931 km (0.116 R)
- M38: 12,748,880 km (0.111 R)
- M39: 12,920,469 km (0.07 R)
- M40: 13,161,920 km (0.06 R)
- M41: 13,404,867 km (0.101 R)
- M42: 13,684,465 km (0.11 R)
- M43: 13,895,249 km (0.098 R)
- M44: 14,001,164 km (0.12 R)
- M45: 14,107,378 km (0.117 R)
- M46: 14,320,406 km (0.064 R)
- M47: 14,893,814 km (0.066 R)
- M48: 15,438,351 km (0.053 R)
- M49: 15,548,006 km (0.071 R)
- M50: 15,804,865 km (0.077 R)
- M51: 16,322,923 km (0.106 R)
- M52: 16,584,121 km (0.05 R)
- M53: 17,148,404 km (0.107 R)
- M54: 17,872,158 km (0.114 R)
- M55: 18,373,162 km (0.106 R)
- M56: 18,917,848 km (0.085 R)
- M57: 19,310,243 km (0.094 R)
- M58: 19,784,618 km (0.078 R)
- M59: 19,943,640 km (0.108 R)
- M60: 20,222,790 km (0.114 R)
- M61: 20,302,825 km (0.115 R)
- M62: 20,865,911 km (0.086 R)
- M63: 21,027,776 km (0.069 R)
- M64: 21,312,012 km (0.066 R)
- M65: 21,720,264 km (0.096 R)
- M66: 22,960,580 km (0.086 R)
- M67: 23,211,306 km (0.105 R)
- M68: 23,673,564 km (0.099 R)
- M69: 24,096,327 km (0.089 R)
- M70: 24,266,271 km (0.106 R)
- M71: 25,035,353 km (0.092 R)
- M72: 25,466,195 km (0.042 R)
- M73: 25,639,130 km (0.102 R)
- M74: 26,378,742 km (0.116 R)
- M75: 26,993,141 km (0.096 R)
- M76: 28,191,270 km (0.051 R)
- M77: 28,370,189 km (0.106 R)
- M78: 28,594,586 km (0.034 R)
- M79: 28,684,345 km (0.033 R)
- M80: 29,542,887 km (0.119 R)
- M81: 29,724,648 km (0.098 R)
Planet 9 - Gas Giant
Semi-Major Axis: 5.61 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 990.8
Radius: 11.5
Gravity: 7.49 G
Time & Orbit
Eccentricity (e): 0.162
Orbit Range: 4.7 AU - 6.52 AU
Year: 5006 Days
Day: 13.6 Hours
Environment
Temp: -155 °C
Axial Tilt: 25.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (74)
Outer Limit: 49,838,344 km
- M1: 187,745 km (0.097 R)
- M2: 302,487 km (0.068 R)
- M3: 693,985 km (0.069 R)
- M4: 884,423 km (0.115 R)
- M5: 1,203,066 km (0.099 R)
- M6: 1,504,955 km (0.051 R)
- M7: 1,611,019 km (0.118 R)
- M8: 1,812,378 km (0.098 R)
- M9: 2,100,354 km (0.092 R)
- M10: 2,260,125 km (0.1 R)
- M11: 2,362,001 km (0.089 R)
- M12: 2,570,690 km (0.068 R)
- M13: 2,785,363 km (0.063 R)
- M14: 3,006,169 km (0.085 R)
- M15: 3,751,017 km (0.104 R)
- M16: 3,921,409 km (0.045 R)
- M17: 4,169,442 km (0.054 R)
- M18: 4,371,549 km (0.054 R)
- M19: 4,576,947 km (0.027 R)
- M20: 4,706,947 km (0.118 R)
- M21: 6,245,861 km (0.118 R)
- M22: 6,390,372 km (0.096 R)
- M23: 7,039,328 km (0.089 R)
- M24: 7,371,884 km (0.026 R)
- M25: 7,771,310 km (0.103 R)
- M26: 8,431,785 km (0.12 R)
- M27: 8,559,541 km (0.056 R)
- M28: 8,914,537 km (0.092 R)
- M29: 9,373,204 km (0.11 R)
- M30: 9,705,611 km (0.07 R)
- M31: 10,075,716 km (0.074 R)
- M32: 10,177,592 km (0.114 R)
- M33: 10,726,018 km (0.107 R)
- M34: 12,211,375 km (0.073 R)
- M35: 13,311,368 km (0.09 R)
- M36: 14,252,189 km (0.115 R)
- M37: 14,634,561 km (0.086 R)
- M38: 15,059,120 km (0.097 R)
- M39: 15,526,763 km (0.107 R)
- M40: 15,683,841 km (0.112 R)
- M41: 15,920,205 km (0.102 R)
- M42: 16,038,986 km (0.115 R)
- M43: 16,356,882 km (0.035 R)
- M44: 16,516,652 km (0.108 R)
- M45: 17,363,825 km (0.09 R)
- M46: 17,690,247 km (0.108 R)
- M47: 18,349,226 km (0.115 R)
- M48: 18,473,691 km (0.095 R)
- M49: 18,640,044 km (0.09 R)
- M50: 19,352,729 km (0.087 R)
- M51: 20,159,959 km (0.091 R)
- M52: 20,331,248 km (0.081 R)
- M53: 20,460,052 km (0.077 R)
- M54: 20,978,109 km (0.039 R)
- M55: 21,719,217 km (0.086 R)
- M56: 23,137,704 km (0.093 R)
- M57: 23,632,125 km (0.058 R)
- M58: 23,948,674 km (0.064 R)
- M59: 24,039,331 km (0.1 R)
- M60: 25,970,190 km (0.044 R)
- M61: 27,001,219 km (0.066 R)
- M62: 27,095,615 km (0.116 R)
- M63: 27,190,161 km (0.082 R)
- M64: 28,189,176 km (0.107 R)
- M65: 28,813,747 km (0.104 R)
- M66: 29,055,198 km (0.048 R)
- M67: 29,637,283 km (0.116 R)
- M68: 29,978,516 km (0.083 R)
- M69: 30,174,190 km (0.106 R)
- M70: 30,812,973 km (0.107 R)
- M71: 31,954,105 km (0.068 R)
- M72: 32,153,968 km (0.035 R)
- M73: 32,605,155 km (0.119 R)
- M74: 34,124,321 km (0.062 R)
Planet 10 - Gas Giant
Semi-Major Axis: 8.61 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 850
Radius: 10.6
Gravity: 7.56 G
Time & Orbit
Eccentricity (e): 0.055
Orbit Range: 8.14 AU - 9.08 AU
Year: 9518 Days
Day: 10.4 Hours
Environment
Temp: -170 °C
Axial Tilt: 7.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (88)
Outer Limit: 49,838,344 km
- M1: 133,441 km (0.094 R)
- M2: 429,795 km (0.113 R)
- M3: 514,617 km (0.104 R)
- M4: 654,491 km (0.114 R)
- M5: 738,265 km (0.099 R)
- M6: 862,432 km (0.115 R)
- M7: 1,132,456 km (0.106 R)
- M8: 1,277,715 km (0.114 R)
- M9: 1,407,417 km (0.12 R)
- M10: 2,434,855 km (0.03 R)
- M11: 2,680,046 km (0.116 R)
- M12: 2,791,646 km (0.03 R)
- M13: 2,904,742 km (0.109 R)
- M14: 4,023,136 km (0.108 R)
- M15: 4,881,229 km (0.106 R)
- M16: 5,018,111 km (0.115 R)
- M17: 5,087,076 km (0.109 R)
- M18: 5,226,052 km (0.047 R)
- M19: 5,758,321 km (0.096 R)
- M20: 6,049,289 km (0.104 R)
- M21: 6,645,736 km (0.102 R)
- M22: 7,654,773 km (0.1 R)
- M23: 8,015,304 km (0.101 R)
- M24: 8,299,391 km (0.09 R)
- M25: 8,794,410 km (0.114 R)
- M26: 9,256,518 km (0.075 R)
- M27: 10,029,789 km (0.044 R)
- M28: 10,117,005 km (0.111 R)
- M29: 10,292,184 km (0.08 R)
- M30: 10,424,129 km (0.073 R)
- M31: 11,228,367 km (0.092 R)
- M32: 11,637,817 km (0.085 R)
- M33: 12,378,027 km (0.12 R)
- M34: 13,903,776 km (0.066 R)
- M35: 14,491,247 km (0.082 R)
- M36: 15,690,273 km (0.071 R)
- M37: 15,893,128 km (0.109 R)
- M38: 16,199,205 km (0.1 R)
- M39: 16,868,955 km (0.116 R)
- M40: 17,547,830 km (0.066 R)
- M41: 18,129,168 km (0.12 R)
- M42: 19,746,769 km (0.111 R)
- M43: 20,075,735 km (0.079 R)
- M44: 20,850,652 km (0.078 R)
- M45: 21,353,899 km (0.086 R)
- M46: 22,658,243 km (0.08 R)
- M47: 23,580,664 km (0.118 R)
- M48: 24,221,990 km (0.117 R)
- M49: 25,343,375 km (0.091 R)
- M50: 26,000,260 km (0.104 R)
- M51: 26,541,804 km (0.071 R)
- M52: 26,965,764 km (0.116 R)
- M53: 28,745,380 km (0.066 R)
- M54: 28,869,547 km (0.117 R)
- M55: 29,806,329 km (0.068 R)
- M56: 31,070,730 km (0.073 R)
- M57: 31,517,429 km (0.092 R)
- M58: 32,223,681 km (0.113 R)
- M59: 32,417,111 km (0.105 R)
- M60: 33,586,368 km (0.086 R)
- M61: 33,782,640 km (0.104 R)
- M62: 34,571,320 km (0.113 R)
- M63: 34,769,388 km (0.094 R)
- M64: 35,166,719 km (0.116 R)
- M65: 35,233,141 km (0.05 R)
- M66: 36,838,625 km (0.086 R)
- M67: 37,108,500 km (0.082 R)
- M68: 37,446,890 km (0.045 R)
- M69: 37,514,658 km (0.087 R)
- M70: 37,650,343 km (0.081 R)
- M71: 37,922,163 km (0.113 R)
- M72: 38,741,660 km (0.091 R)
- M73: 38,810,325 km (0.111 R)
- M74: 39,429,062 km (0.069 R)
- M75: 39,498,027 km (0.104 R)
- M76: 41,375,181 km (0.118 R)
- M77: 41,655,826 km (0.102 R)
- M78: 42,007,381 km (0.088 R)
- M79: 42,430,594 km (0.103 R)
- M80: 42,855,302 km (0.091 R)
- M81: 43,352,416 km (0.075 R)
- M82: 44,209,163 km (0.065 R)
- M83: 44,927,532 km (0.032 R)
- M84: 45,577,235 km (0.119 R)
- M85: 46,521,198 km (0.085 R)
- M86: 47,251,684 km (0.072 R)
- M87: 47,618,349 km (0.103 R)
- M88: 48,133,414 km (0.041 R)
Kuiper Belt
Range: 30 - 50 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 244 - 10,844 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.