G6V Star System Generated (Seed: 1766657527)
Star Details
Spectral Class: G7V
Temperature: 5,400 K
Mass: 0.95 sol
Luminosity: 0.84 lux
Habitable Zone (HZ)
Inner Boundary: 0.87 AU
Outer Boundary: 1.26 AU
Physical Limits
Snow Line: 4.4 AU
Max System Radius: 19.5 AU
Planetary System (6 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 1.2 AU
Status: HZ
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.27
Radius: 1.1
Gravity: 1.05 G
Time & Orbit
Eccentricity (e): 0.147
Orbit Range: 1.02 AU - 1.38 AU
Year: 493 Days
Day: 36.3 Hours
Environment
Temp: -7 °C
Axial Tilt: 45.4 °
Atmosphere: Nâ‚‚, Oâ‚‚
Biome: Arid/Tundra
Planet 2 - Gas Giant
Semi-Major Axis: 5.86 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 946.4
Radius: 9
Gravity: 11.68 G
Time & Orbit
Eccentricity (e): 0.129
Orbit Range: 5.1 AU - 6.62 AU
Year: 5316 Days
Day: 12.5 Hours
Environment
Temp: -160 °C
Axial Tilt: 29.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (83)
Outer Limit: 79,855,033 km
- M1: 302,487 km (0.11 R)
- M2: 490,681 km (0.1 R)
- M3: 562,338 km (0.1 R)
- M4: 651,050 km (0.111 R)
- M5: 731,085 km (0.04 R)
- M6: 946,955 km (0.093 R)
- M7: 1,102,387 km (0.11 R)
- M8: 1,673,851 km (0.099 R)
- M9: 1,748,799 km (0.113 R)
- M10: 2,367,835 km (0.069 R)
- M11: 2,495,143 km (0.101 R)
- M12: 2,581,311 km (0.098 R)
- M13: 2,734,499 km (0.114 R)
- M14: 2,981,186 km (0.071 R)
- M15: 3,095,928 km (0.112 R)
- M16: 3,353,236 km (0.104 R)
- M17: 3,496,551 km (0.113 R)
- M18: 3,593,191 km (0.071 R)
- M19: 3,814,147 km (0.093 R)
- M20: 4,243,493 km (0.112 R)
- M21: 4,320,835 km (0.055 R)
- M22: 4,477,015 km (0.095 R)
- M23: 4,688,248 km (0.102 R)
- M24: 5,258,216 km (0.075 R)
- M25: 5,341,392 km (0.034 R)
- M26: 5,593,764 km (0.044 R)
- M27: 5,850,025 km (0.117 R)
- M28: 6,051,982 km (0.038 R)
- M29: 6,139,347 km (0.079 R)
- M30: 6,822,411 km (0.117 R)
- M31: 7,157,660 km (0.118 R)
- M32: 7,717,904 km (0.086 R)
- M33: 8,486,687 km (0.094 R)
- M34: 8,979,463 km (0.073 R)
- M35: 9,079,244 km (0.079 R)
- M36: 9,212,686 km (0.03 R)
- M37: 9,380,534 km (0.113 R)
- M38: 10,338,858 km (0.094 R)
- M39: 10,583,301 km (0.107 R)
- M40: 11,149,230 km (0.088 R)
- M41: 11,220,738 km (0.074 R)
- M42: 11,399,956 km (0.096 R)
- M43: 12,384,460 km (0.102 R)
- M44: 12,718,661 km (0.071 R)
- M45: 13,055,705 km (0.075 R)
- M46: 13,206,500 km (0.068 R)
- M47: 13,892,257 km (0.06 R)
- M48: 15,777,040 km (0.112 R)
- M49: 16,058,583 km (0.09 R)
- M50: 16,179,758 km (0.057 R)
- M51: 17,408,106 km (0.068 R)
- M52: 17,532,571 km (0.109 R)
- M53: 17,740,662 km (0.071 R)
- M54: 17,949,650 km (0.048 R)
- M55: 18,243,610 km (0.078 R)
- M56: 18,623,738 km (0.102 R)
- M57: 19,263,269 km (0.1 R)
- M58: 19,780,130 km (0.107 R)
- M59: 20,959,559 km (0.096 R)
- M60: 21,224,796 km (0.095 R)
- M61: 21,892,601 km (0.077 R)
- M62: 22,341,694 km (0.104 R)
- M63: 24,122,058 km (0.079 R)
- M64: 24,679,011 km (0.045 R)
- M65: 24,865,560 km (0.084 R)
- M66: 25,099,531 km (0.051 R)
- M67: 25,193,179 km (0.12 R)
- M68: 25,758,210 km (0.081 R)
- M69: 25,900,179 km (0.055 R)
- M70: 25,994,874 km (0.114 R)
- M71: 26,613,611 km (0.073 R)
- M72: 27,188,964 km (0.059 R)
- M73: 27,865,595 km (0.104 R)
- M74: 28,011,154 km (0.071 R)
- M75: 28,841,572 km (0.115 R)
- M76: 29,432,633 km (0.12 R)
- M77: 29,531,517 km (0.088 R)
- M78: 30,977,680 km (0.105 R)
- M79: 31,179,039 km (0.105 R)
- M80: 31,380,846 km (0.082 R)
- M81: 31,836,222 km (0.115 R)
- M82: 31,988,513 km (0.114 R)
- M83: 33,525,032 km (0.081 R)
Planet 3 - Gas Giant
Semi-Major Axis: 6.52 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 458
Radius: 11
Gravity: 3.79 G
Time & Orbit
Eccentricity (e): 0.082
Orbit Range: 5.99 AU - 7.05 AU
Year: 6239 Days
Day: 9.9 Hours
Environment
Temp: -156 °C
Axial Tilt: 0.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (69)
Outer Limit: 79,855,033 km
- M1: 158,574 km (0.028 R)
- M2: 353,649 km (0.098 R)
- M3: 457,171 km (0.093 R)
- M4: 630,106 km (0.069 R)
- M5: 852,109 km (0.096 R)
- M6: 1,042,996 km (0.095 R)
- M7: 1,173,296 km (0.097 R)
- M8: 1,532,032 km (0.077 R)
- M9: 1,836,314 km (0.114 R)
- M10: 2,160,193 km (0.115 R)
- M11: 2,367,087 km (0.083 R)
- M12: 2,841,312 km (0.07 R)
- M13: 2,943,936 km (0.098 R)
- M14: 3,563,272 km (0.084 R)
- M15: 3,741,293 km (0.072 R)
- M16: 3,967,934 km (0.111 R)
- M17: 4,059,787 km (0.051 R)
- M18: 4,554,358 km (0.112 R)
- M19: 4,674,933 km (0.117 R)
- M20: 5,043,094 km (0.058 R)
- M21: 5,142,876 km (0.071 R)
- M22: 5,395,247 km (0.089 R)
- M23: 5,497,273 km (0.098 R)
- M24: 6,283,559 km (0.082 R)
- M25: 6,690,017 km (0.101 R)
- M26: 6,827,348 km (0.115 R)
- M27: 7,273,299 km (0.098 R)
- M28: 7,414,669 km (0.089 R)
- M29: 7,614,083 km (0.116 R)
- M30: 8,076,490 km (0.098 R)
- M31: 8,370,150 km (0.059 R)
- M32: 9,150,154 km (0.066 R)
- M33: 10,141,988 km (0.072 R)
- M34: 10,331,678 km (0.117 R)
- M35: 10,650,620 km (0.095 R)
- M36: 11,363,604 km (0.102 R)
- M37: 11,759,141 km (0.086 R)
- M38: 12,428,142 km (0.091 R)
- M39: 13,838,401 km (0.074 R)
- M40: 13,943,569 km (0.087 R)
- M41: 14,366,931 km (0.12 R)
- M42: 14,544,503 km (0.067 R)
- M43: 15,771,804 km (0.076 R)
- M44: 16,434,972 km (0.068 R)
- M45: 17,182,662 km (0.119 R)
- M46: 17,902,976 km (0.091 R)
- M47: 17,979,420 km (0.114 R)
- M48: 18,170,905 km (0.097 R)
- M49: 18,324,692 km (0.1 R)
- M50: 18,440,182 km (0.062 R)
- M51: 19,099,609 km (0.039 R)
- M52: 19,295,133 km (0.045 R)
- M53: 19,530,451 km (0.077 R)
- M54: 20,721,699 km (0.028 R)
- M55: 21,569,470 km (0.1 R)
- M56: 22,387,471 km (0.114 R)
- M57: 23,090,731 km (0.086 R)
- M58: 23,298,971 km (0.09 R)
- M59: 23,591,584 km (0.113 R)
- M60: 23,675,359 km (0.043 R)
- M61: 24,096,028 km (0.085 R)
- M62: 24,391,783 km (0.12 R)
- M63: 24,561,427 km (0.059 R)
- M64: 25,501,351 km (0.095 R)
- M65: 25,759,706 km (0.093 R)
- M66: 26,670,907 km (0.079 R)
- M67: 27,990,958 km (0.107 R)
- M68: 28,614,183 km (0.109 R)
- M69: 29,738,411 km (0.063 R)
Planet 4 - Gas Giant
Semi-Major Axis: 9.41 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 832
Radius: 11.8
Gravity: 5.98 G
Time & Orbit
Eccentricity (e): 0.164
Orbit Range: 7.87 AU - 10.95 AU
Year: 10817 Days
Day: 14.9 Hours
Environment
Temp: -186 °C
Axial Tilt: 44.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (85)
Outer Limit: 79,855,033 km
- M1: 171,738 km (0.079 R)
- M2: 747,690 km (0.09 R)
- M3: 858,991 km (0.106 R)
- M4: 976,425 km (0.113 R)
- M5: 1,573,770 km (0.118 R)
- M6: 1,695,692 km (0.051 R)
- M7: 1,846,337 km (0.104 R)
- M8: 2,107,535 km (0.097 R)
- M9: 2,408,825 km (0.038 R)
- M10: 2,695,006 km (0.115 R)
- M11: 2,962,038 km (0.106 R)
- M12: 3,083,511 km (0.115 R)
- M13: 3,426,390 km (0.115 R)
- M14: 3,586,459 km (0.069 R)
- M15: 3,683,548 km (0.076 R)
- M16: 3,814,596 km (0.086 R)
- M17: 6,664,286 km (0.12 R)
- M18: 6,824,505 km (0.108 R)
- M19: 7,067,452 km (0.079 R)
- M20: 8,195,121 km (0.056 R)
- M21: 8,323,925 km (0.084 R)
- M22: 9,558,107 km (0.084 R)
- M23: 10,943,084 km (0.083 R)
- M24: 11,037,630 km (0.07 R)
- M25: 12,439,362 km (0.051 R)
- M26: 12,885,762 km (0.076 R)
- M27: 13,794,270 km (0.111 R)
- M28: 13,896,445 km (0.116 R)
- M29: 14,050,232 km (0.068 R)
- M30: 14,880,201 km (0.093 R)
- M31: 15,779,434 km (0.088 R)
- M32: 16,750,623 km (0.079 R)
- M33: 17,078,691 km (0.04 R)
- M34: 17,685,610 km (0.076 R)
- M35: 17,963,862 km (0.099 R)
- M36: 18,524,704 km (0.099 R)
- M37: 18,863,992 km (0.103 R)
- M38: 20,067,657 km (0.112 R)
- M39: 20,357,877 km (0.076 R)
- M40: 20,649,592 km (0.117 R)
- M41: 22,008,988 km (0.111 R)
- M42: 22,368,322 km (0.104 R)
- M43: 22,609,025 km (0.111 R)
- M44: 23,336,221 km (0.075 R)
- M45: 23,580,215 km (0.109 R)
- M46: 23,702,586 km (0.118 R)
- M47: 24,255,948 km (0.095 R)
- M48: 25,312,558 km (0.117 R)
- M49: 25,878,038 km (0.028 R)
- M50: 27,535,134 km (0.1 R)
- M51: 28,506,622 km (0.035 R)
- M52: 29,687,398 km (0.091 R)
- M53: 30,084,431 km (0.112 R)
- M54: 30,483,259 km (0.098 R)
- M55: 30,817,012 km (0.111 R)
- M56: 31,555,576 km (0.036 R)
- M57: 31,757,982 km (0.039 R)
- M58: 32,096,223 km (0.074 R)
- M59: 32,231,908 km (0.097 R)
- M60: 34,567,430 km (0.099 R)
- M61: 37,099,075 km (0.066 R)
- M62: 37,241,492 km (0.074 R)
- M63: 39,036,816 km (0.119 R)
- M64: 39,181,627 km (0.09 R)
- M65: 40,346,695 km (0.119 R)
- M66: 40,713,210 km (0.105 R)
- M67: 40,786,663 km (0.073 R)
- M68: 41,007,170 km (0.1 R)
- M69: 42,338,741 km (0.119 R)
- M70: 42,562,090 km (0.075 R)
- M71: 43,759,621 km (0.047 R)
- M72: 44,060,762 km (0.054 R)
- M73: 44,816,530 km (0.059 R)
- M74: 45,348,201 km (0.113 R)
- M75: 45,576,637 km (0.091 R)
- M76: 46,264,338 km (0.096 R)
- M77: 46,341,082 km (0.106 R)
- M78: 46,494,420 km (0.104 R)
- M79: 46,878,587 km (0.109 R)
- M80: 47,805,047 km (0.104 R)
- M81: 47,882,389 km (0.064 R)
- M82: 48,503,669 km (0.084 R)
- M83: 49,911,385 km (0.041 R)
- M84: 50,383,516 km (0.084 R)
- M85: 53,730,319 km (0.11 R)
Planet 5 - Ice Giant
Semi-Major Axis: 12.25 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 622
Radius: 6.7
Gravity: 13.86 G
Time & Orbit
Eccentricity (e): 0.04
Orbit Range: 11.76 AU - 12.74 AU
Year: 16067 Days
Day: 20.6 Hours
Environment
Temp: -177 °C
Axial Tilt: 35.1 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (98)
Outer Limit: 79,855,033 km
- M1: 146,905 km (0.097 R)
- M2: 334,650 km (0.058 R)
- M3: 592,108 km (0.097 R)
- M4: 2,004,462 km (0.063 R)
- M5: 2,340,309 km (0.102 R)
- M6: 2,403,290 km (0.057 R)
- M7: 2,693,659 km (0.075 R)
- M8: 3,307,908 km (0.098 R)
- M9: 3,485,930 km (0.078 R)
- M10: 4,001,444 km (0.1 R)
- M11: 4,229,581 km (0.09 R)
- M12: 5,516,870 km (0.049 R)
- M13: 5,559,057 km (0.079 R)
- M14: 6,202,777 km (0.043 R)
- M15: 6,378,554 km (0.12 R)
- M16: 6,779,776 km (0.084 R)
- M17: 7,189,225 km (0.067 R)
- M18: 7,281,228 km (0.07 R)
- M19: 7,327,453 km (0.108 R)
- M20: 8,611,153 km (0.071 R)
- M21: 8,660,071 km (0.117 R)
- M22: 9,104,078 km (0.047 R)
- M23: 13,306,880 km (0.05 R)
- M24: 13,363,428 km (0.107 R)
- M25: 13,647,365 km (0.118 R)
- M26: 14,105,882 km (0.096 R)
- M27: 14,337,011 km (0.116 R)
- M28: 15,096,819 km (0.053 R)
- M29: 15,451,964 km (0.092 R)
- M30: 16,110,045 km (0.11 R)
- M31: 17,701,916 km (0.105 R)
- M32: 18,138,891 km (0.075 R)
- M33: 18,453,346 km (0.092 R)
- M34: 19,023,763 km (0.04 R)
- M35: 19,343,154 km (0.089 R)
- M36: 19,793,294 km (0.107 R)
- M37: 19,987,173 km (0.058 R)
- M38: 20,703,897 km (0.089 R)
- M39: 20,769,420 km (0.081 R)
- M40: 20,900,767 km (0.107 R)
- M41: 20,966,441 km (0.062 R)
- M42: 21,495,120 km (0.097 R)
- M43: 22,430,854 km (0.112 R)
- M44: 22,903,733 km (0.08 R)
- M45: 23,175,403 km (0.108 R)
- M46: 23,448,120 km (0.114 R)
- M47: 23,653,368 km (0.095 R)
- M48: 24,341,818 km (0.104 R)
- M49: 24,549,759 km (0.097 R)
- M50: 24,967,137 km (0.036 R)
- M51: 25,176,723 km (0.085 R)
- M52: 25,527,381 km (0.04 R)
- M53: 25,738,463 km (0.071 R)
- M54: 26,020,904 km (0.095 R)
- M55: 27,881,752 km (0.096 R)
- M56: 27,954,157 km (0.101 R)
- M57: 28,099,267 km (0.117 R)
- M58: 28,608,798 km (0.11 R)
- M59: 29,194,922 km (0.1 R)
- M60: 29,637,133 km (0.088 R)
- M61: 29,785,086 km (0.096 R)
- M62: 30,976,932 km (0.089 R)
- M63: 32,184,486 km (0.05 R)
- M64: 32,641,208 km (0.076 R)
- M65: 33,023,431 km (0.082 R)
- M66: 33,638,278 km (0.107 R)
- M67: 34,179,224 km (0.087 R)
- M68: 34,256,716 km (0.117 R)
- M69: 34,801,102 km (0.114 R)
- M70: 35,035,223 km (0.111 R)
- M71: 35,583,499 km (0.049 R)
- M72: 36,927,038 km (0.062 R)
- M73: 38,690,198 km (0.086 R)
- M74: 39,419,488 km (0.082 R)
- M75: 41,303,374 km (0.076 R)
- M76: 41,882,617 km (0.119 R)
- M77: 42,798,156 km (0.056 R)
- M78: 42,965,406 km (0.112 R)
- M79: 43,720,427 km (0.079 R)
- M80: 44,818,774 km (0.118 R)
- M81: 45,669,687 km (0.087 R)
- M82: 46,612,004 km (0.114 R)
- M83: 46,784,041 km (0.106 R)
- M84: 47,993,989 km (0.064 R)
- M85: 50,180,063 km (0.096 R)
- M86: 51,241,011 km (0.064 R)
- M87: 52,219,979 km (0.12 R)
- M88: 52,398,599 km (0.079 R)
- M89: 53,115,173 km (0.091 R)
- M90: 56,379,997 km (0.07 R)
- M91: 57,298,378 km (0.028 R)
- M92: 59,802,497 km (0.071 R)
- M93: 60,176,641 km (0.111 R)
- M94: 61,303,263 km (0.073 R)
- M95: 61,586,152 km (0.095 R)
- M96: 62,816,445 km (0.044 R)
- M97: 63,101,579 km (0.106 R)
- M98: 63,387,011 km (0.112 R)
Planet 6 - Ice Giant
Semi-Major Axis: 14.92 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 679.1
Radius: 4.8
Gravity: 29.47 G
Time & Orbit
Eccentricity (e): 0.03
Orbit Range: 14.47 AU - 15.37 AU
Year: 21596 Days
Day: 20.1 Hours
Environment
Temp: -187 °C
Axial Tilt: 7.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (91)
Outer Limit: 79,855,033 km
- M1: 116,836 km (0.087 R)
- M2: 164,558 km (0.052 R)
- M3: 516,412 km (0.079 R)
- M4: 1,261,858 km (0.084 R)
- M5: 2,107,385 km (0.119 R)
- M6: 2,583,106 km (0.053 R)
- M7: 2,891,876 km (0.092 R)
- M8: 3,010,657 km (0.053 R)
- M9: 3,294,145 km (0.1 R)
- M10: 3,930,086 km (0.119 R)
- M11: 4,150,443 km (0.116 R)
- M12: 4,557,050 km (0.03 R)
- M13: 4,976,224 km (0.04 R)
- M14: 5,603,487 km (0.117 R)
- M15: 6,720,535 km (0.108 R)
- M16: 6,825,403 km (0.094 R)
- M17: 6,930,869 km (0.065 R)
- M18: 7,090,041 km (0.117 R)
- M19: 7,466,131 km (0.108 R)
- M20: 8,014,556 km (0.109 R)
- M21: 9,034,215 km (0.073 R)
- M22: 11,567,057 km (0.085 R)
- M23: 12,264,333 km (0.12 R)
- M24: 13,899,138 km (0.039 R)
- M25: 16,089,101 km (0.09 R)
- M26: 17,800,651 km (0.115 R)
- M27: 17,945,910 km (0.08 R)
- M28: 19,419,599 km (0.079 R)
- M29: 19,794,042 km (0.108 R)
- M30: 20,019,785 km (0.112 R)
- M31: 21,392,645 km (0.057 R)
- M32: 21,547,030 km (0.108 R)
- M33: 21,856,847 km (0.107 R)
- M34: 22,012,429 km (0.064 R)
- M35: 22,559,508 km (0.102 R)
- M36: 23,428,373 km (0.115 R)
- M37: 24,308,158 km (0.095 R)
- M38: 25,198,714 km (0.111 R)
- M39: 25,443,456 km (0.092 R)
- M40: 26,430,204 km (0.086 R)
- M41: 28,441,098 km (0.117 R)
- M42: 29,207,638 km (0.085 R)
- M43: 29,378,927 km (0.1 R)
- M44: 30,327,079 km (0.118 R)
- M45: 30,500,463 km (0.095 R)
- M46: 31,723,874 km (0.096 R)
- M47: 31,988,064 km (0.093 R)
- M48: 33,052,303 km (0.095 R)
- M49: 33,320,233 km (0.069 R)
- M50: 34,942,472 km (0.059 R)
- M51: 35,854,870 km (0.107 R)
- M52: 36,313,986 km (0.109 R)
- M53: 36,867,348 km (0.034 R)
- M54: 37,889,401 km (0.115 R)
- M55: 41,010,760 km (0.094 R)
- M56: 41,298,587 km (0.115 R)
- M57: 41,587,011 km (0.03 R)
- M58: 41,876,184 km (0.035 R)
- M59: 43,234,383 km (0.045 R)
- M60: 46,392,843 km (0.093 R)
- M61: 46,792,868 km (0.109 R)
- M62: 47,093,559 km (0.099 R)
- M63: 48,100,652 km (0.052 R)
- M64: 48,302,908 km (0.071 R)
- M65: 48,505,464 km (0.061 R)
- M66: 48,606,891 km (0.099 R)
- M67: 48,708,319 km (0.061 R)
- M68: 50,033,756 km (0.076 R)
- M69: 51,061,194 km (0.102 R)
- M70: 51,267,639 km (0.116 R)
- M71: 51,577,606 km (0.073 R)
- M72: 52,095,813 km (0.029 R)
- M73: 52,615,516 km (0.11 R)
- M74: 53,032,744 km (0.086 R)
- M75: 53,555,589 km (0.116 R)
- M76: 53,660,457 km (0.069 R)
- M77: 56,515,383 km (0.098 R)
- M78: 56,942,634 km (0.074 R)
- M79: 63,366,217 km (0.114 R)
- M80: 64,032,227 km (0.108 R)
- M81: 64,143,528 km (0.101 R)
- M82: 64,589,030 km (0.035 R)
- M83: 64,700,630 km (0.053 R)
- M84: 66,494,010 km (0.079 R)
- M85: 67,736,420 km (0.083 R)
- M86: 72,434,391 km (0.114 R)
- M87: 72,782,206 km (0.104 R)
- M88: 77,118,002 km (0.062 R)
- M89: 77,236,333 km (0.116 R)
- M90: 77,473,147 km (0.088 R)
- M91: 78,780,183 km (0.083 R)
Kuiper Belt
Range: 30 - 57 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 282 - 13,008 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.