G0V Star System Generated (Seed: 1768717475)
Star Details
Spectral Class: G3V
Temperature: 5,720 K
Mass: 1.03 sol
Luminosity: 1.11 lux
Habitable Zone (HZ)
Inner Boundary: 1 AU
Outer Boundary: 1.45 AU
Physical Limits
Snow Line: 5.06 AU
Max System Radius: 20.3 AU
Planetary System (10 Planets)
Planet 1 - Terrestrial
Semi-Major Axis: 0.53 AU
Status: Inner (Hot)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.73
Radius: 1.25
Gravity: 1.11 G
Time & Orbit
Eccentricity (e): 0.069
Orbit Range: 0.49 AU - 0.57 AU
Year: 139 Days
Day: 43 Hours
Environment
Temp: 264 °C
Axial Tilt: 38.7 °
Atmosphere: Dense COâ‚‚
Biome: Volcanic/Barren
Satellites (1)
Outer Limit: 93,518,417 km
- M1: 59,839 km (0.106 R)
Planet 2 - Terrestrial
Semi-Major Axis: 0.57 AU
Status: Inner (Hot)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.4
Radius: 1.81
Gravity: 1.34 G
Time & Orbit
Eccentricity (e): 0.227
Orbit Range: 0.44 AU - 0.7 AU
Year: 155 Days
Day: 42 Hours
Environment
Temp: 245 °C
Axial Tilt: 1.8 °
Atmosphere: Dense COâ‚‚
Biome: Volcanic/Barren
Satellites (1)
Outer Limit: 93,518,417 km
- M1: 361,129 km (0.11 R)
Planet 3 - Terrestrial
Semi-Major Axis: 0.73 AU
Status: Inner (Hot)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.57
Radius: 1.84
Gravity: 1.35 G
Time & Orbit
Eccentricity (e): 0.208
Orbit Range: 0.58 AU - 0.88 AU
Year: 224 Days
Day: 25.2 Hours
Environment
Temp: 203 °C
Axial Tilt: 35.1 °
Atmosphere: Dense COâ‚‚
Biome: Volcanic/Barren
Planet 4 - Terrestrial
Semi-Major Axis: 0.94 AU
Status: Inner (Hot)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 1.82
Radius: 1.27
Gravity: 1.13 G
Time & Orbit
Eccentricity (e): 0.142
Orbit Range: 0.81 AU - 1.07 AU
Year: 328 Days
Day: 31.7 Hours
Environment
Temp: 87 °C
Axial Tilt: 32.7 °
Atmosphere: Dense COâ‚‚
Biome: Volcanic/Barren
Planet 5 - Terrestrial
Semi-Major Axis: 0.97 AU
Status: Inner (Hot)
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 4.38
Radius: 1.81
Gravity: 1.34 G
Time & Orbit
Eccentricity (e): 0.241
Orbit Range: 0.74 AU - 1.2 AU
Year: 344 Days
Day: 28.1 Hours
Environment
Temp: 137 °C
Axial Tilt: 101.6 °
Atmosphere: Dense COâ‚‚
Biome: Volcanic/Barren
Planet 6 - Terrestrial
Semi-Major Axis: 1.23 AU
Status: HZ
Composition: Rocky (Silicates/Metals)
Physical Data
Mass: 3.1
Radius: 1.57
Gravity: 1.26 G
Time & Orbit
Eccentricity (e): 0.247
Orbit Range: 0.93 AU - 1.53 AU
Year: 491 Days
Day: 25.4 Hours
Environment
Temp: 0 °C
Axial Tilt: 29.2 °
Atmosphere: Nâ‚‚, Oâ‚‚
Biome: Oceanic/Continental
Asteroid Belt
Center: 6.96 AU
Composition
Type: Main (Rocky/Icy Mix)
A dense region of planetesimals and debris.
Boundary
Planet 7 - Ice Giant
Semi-Major Axis: 12.68 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 869.8
Radius: 7.4
Gravity: 15.88 G
Time & Orbit
Eccentricity (e): 0.128
Orbit Range: 11.06 AU - 14.3 AU
Year: 16250 Days
Day: 23.6 Hours
Environment
Temp: -178 °C
Axial Tilt: 15.3 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (90)
Outer Limit: 93,518,417 km
- M1: 110,104 km (0.071 R)
- M2: 502,200 km (0.04 R)
- M3: 730,935 km (0.112 R)
- M4: 1,067,082 km (0.079 R)
- M5: 1,198,129 km (0.106 R)
- M6: 1,279,361 km (0.112 R)
- M7: 1,334,563 km (0.12 R)
- M8: 1,534,425 km (0.1 R)
- M9: 1,622,987 km (0.102 R)
- M10: 1,774,530 km (0.118 R)
- M11: 1,836,463 km (0.065 R)
- M12: 2,391,920 km (0.04 R)
- M13: 2,849,989 km (0.076 R)
- M14: 4,506,785 km (0.097 R)
- M15: 5,203,164 km (0.11 R)
- M16: 5,979,277 km (0.08 R)
- M17: 6,214,445 km (0.103 R)
- M18: 6,404,734 km (0.093 R)
- M19: 6,791,145 km (0.067 R)
- M20: 6,840,063 km (0.073 R)
- M21: 8,047,019 km (0.085 R)
- M22: 8,358,931 km (0.066 R)
- M23: 8,463,799 km (0.087 R)
- M24: 9,155,988 km (0.08 R)
- M25: 9,866,428 km (0.063 R)
- M26: 10,312,380 km (0.037 R)
- M27: 10,707,916 km (0.117 R)
- M28: 12,339,431 km (0.06 R)
- M29: 12,399,120 km (0.098 R)
- M30: 14,864,643 km (0.094 R)
- M31: 16,348,803 km (0.069 R)
- M32: 17,341,834 km (0.104 R)
- M33: 17,677,232 km (0.096 R)
- M34: 18,218,328 km (0.043 R)
- M35: 18,354,462 km (0.045 R)
- M36: 19,109,183 km (0.117 R)
- M37: 19,386,089 km (0.115 R)
- M38: 19,734,203 km (0.087 R)
- M39: 21,721,162 km (0.077 R)
- M40: 22,811,581 km (0.086 R)
- M41: 27,425,628 km (0.081 R)
- M42: 27,973,156 km (0.096 R)
- M43: 28,761,387 km (0.084 R)
- M44: 28,840,674 km (0.117 R)
- M45: 29,717,019 km (0.094 R)
- M46: 29,797,203 km (0.101 R)
- M47: 30,118,240 km (0.078 R)
- M48: 30,682,972 km (0.067 R)
- M49: 30,764,054 km (0.119 R)
- M50: 31,007,300 km (0.103 R)
- M51: 31,251,294 km (0.089 R)
- M52: 31,987,017 km (0.115 R)
- M53: 32,398,112 km (0.036 R)
- M54: 32,893,879 km (0.087 R)
- M55: 34,060,443 km (0.071 R)
- M56: 35,325,144 km (0.096 R)
- M57: 36,005,964 km (0.091 R)
- M58: 36,433,664 km (0.119 R)
- M59: 36,519,383 km (0.034 R)
- M60: 37,467,086 km (0.089 R)
- M61: 38,248,436 km (0.12 R)
- M62: 38,859,842 km (0.064 R)
- M63: 40,358,214 km (0.107 R)
- M64: 40,713,509 km (0.097 R)
- M65: 41,427,091 km (0.087 R)
- M66: 42,776,464 km (0.059 R)
- M67: 43,320,103 km (0.077 R)
- M68: 43,592,969 km (0.119 R)
- M69: 44,414,561 km (0.118 R)
- M70: 46,630,404 km (0.063 R)
- M71: 47,003,202 km (0.09 R)
- M72: 47,564,194 km (0.09 R)
- M73: 48,882,002 km (0.069 R)
- M74: 49,925,746 km (0.042 R)
- M75: 50,402,664 km (0.113 R)
- M76: 53,295,438 km (0.09 R)
- M77: 54,271,714 km (0.106 R)
- M78: 55,253,824 km (0.081 R)
- M79: 55,450,994 km (0.095 R)
- M80: 58,034,699 km (0.077 R)
- M81: 61,574,484 km (0.113 R)
- M82: 63,421,868 km (0.113 R)
- M83: 64,352,516 km (0.08 R)
- M84: 64,663,680 km (0.12 R)
- M85: 66,122,408 km (0.073 R)
- M86: 66,331,696 km (0.082 R)
- M87: 67,697,524 km (0.1 R)
- M88: 69,178,693 km (0.026 R)
- M89: 70,349,895 km (0.072 R)
- M90: 70,563,520 km (0.083 R)
Planet 8 - Ice Giant
Semi-Major Axis: 12.97 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 938
Radius: 5
Gravity: 37.52 G
Time & Orbit
Eccentricity (e): 0.181
Orbit Range: 10.62 AU - 15.32 AU
Year: 16811 Days
Day: 16.8 Hours
Environment
Temp: -193 °C
Axial Tilt: 46.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (95)
Outer Limit: 93,518,417 km
- M1: 324,478 km (0.118 R)
- M2: 414,536 km (0.073 R)
- M3: 1,032,076 km (0.061 R)
- M4: 1,085,482 km (0.096 R)
- M5: 1,958,535 km (0.077 R)
- M6: 2,584,004 km (0.115 R)
- M7: 2,805,409 km (0.069 R)
- M8: 2,880,507 km (0.045 R)
- M9: 4,562,137 km (0.059 R)
- M10: 5,613,959 km (0.101 R)
- M11: 5,804,397 km (0.065 R)
- M12: 6,240,326 km (0.07 R)
- M13: 6,737,140 km (0.046 R)
- M14: 6,837,969 km (0.08 R)
- M15: 7,143,598 km (0.108 R)
- M16: 7,768,169 km (0.092 R)
- M17: 7,927,191 km (0.118 R)
- M18: 7,980,298 km (0.117 R)
- M19: 8,464,547 km (0.082 R)
- M20: 8,737,563 km (0.1 R)
- M21: 9,069,072 km (0.063 R)
- M22: 9,124,722 km (0.106 R)
- M23: 9,574,114 km (0.067 R)
- M24: 9,915,796 km (0.115 R)
- M25: 10,145,877 km (0.065 R)
- M26: 10,435,798 km (0.109 R)
- M27: 11,262,326 km (0.108 R)
- M28: 11,382,154 km (0.087 R)
- M29: 11,865,505 km (0.113 R)
- M30: 12,977,466 km (0.064 R)
- M31: 13,482,209 km (0.097 R)
- M32: 13,609,517 km (0.066 R)
- M33: 14,122,338 km (0.078 R)
- M34: 16,439,011 km (0.037 R)
- M35: 17,053,559 km (0.113 R)
- M36: 17,884,575 km (0.112 R)
- M37: 17,954,288 km (0.106 R)
- M38: 19,084,200 km (0.117 R)
- M39: 19,155,559 km (0.111 R)
- M40: 19,513,845 km (0.11 R)
- M41: 20,601,721 km (0.115 R)
- M42: 22,082,590 km (0.08 R)
- M43: 22,382,833 km (0.089 R)
- M44: 23,597,419 km (0.099 R)
- M45: 25,302,086 km (0.098 R)
- M46: 25,380,476 km (0.099 R)
- M47: 25,459,014 km (0.093 R)
- M48: 26,089,869 km (0.119 R)
- M49: 27,609,035 km (0.059 R)
- M50: 29,568,318 km (0.063 R)
- M51: 29,816,501 km (0.075 R)
- M52: 29,982,256 km (0.079 R)
- M53: 30,564,790 km (0.084 R)
- M54: 30,899,440 km (0.067 R)
- M55: 31,825,750 km (0.107 R)
- M56: 32,164,889 km (0.101 R)
- M57: 33,189,335 km (0.083 R)
- M58: 33,878,233 km (0.104 R)
- M59: 36,858,372 km (0.071 R)
- M60: 37,750,873 km (0.107 R)
- M61: 39,556,819 km (0.102 R)
- M62: 40,470,263 km (0.046 R)
- M63: 40,745,673 km (0.094 R)
- M64: 41,113,833 km (0.081 R)
- M65: 42,597,545 km (0.091 R)
- M66: 42,877,742 km (0.06 R)
- M67: 43,721,773 km (0.105 R)
- M68: 44,193,156 km (0.116 R)
- M69: 44,476,793 km (0.08 R)
- M70: 44,571,339 km (0.103 R)
- M71: 48,510,102 km (0.093 R)
- M72: 49,781,983 km (0.091 R)
- M73: 50,076,990 km (0.083 R)
- M74: 51,064,784 km (0.027 R)
- M75: 51,759,966 km (0.091 R)
- M76: 53,059,522 km (0.061 R)
- M77: 53,260,432 km (0.091 R)
- M78: 54,977,965 km (0.047 R)
- M79: 55,792,526 km (0.086 R)
- M80: 57,227,618 km (0.114 R)
- M81: 57,433,615 km (0.069 R)
- M82: 57,639,910 km (0.089 R)
- M83: 58,260,143 km (0.11 R)
- M84: 58,467,336 km (0.087 R)
- M85: 58,571,007 km (0.103 R)
- M86: 58,882,619 km (0.088 R)
- M87: 60,448,311 km (0.062 R)
- M88: 61,921,850 km (0.082 R)
- M89: 62,557,042 km (0.096 R)
- M90: 65,442,037 km (0.1 R)
- M91: 66,089,048 km (0.046 R)
- M92: 70,125,199 km (0.108 R)
- M93: 70,235,452 km (0.057 R)
- M94: 72,228,694 km (0.095 R)
- M95: 73,120,447 km (0.084 R)
Planet 9 - Ice Giant
Semi-Major Axis: 15.66 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 523.9
Radius: 3.1
Gravity: 54.52 G
Time & Orbit
Eccentricity (e): 0.121
Orbit Range: 13.77 AU - 17.55 AU
Year: 22303 Days
Day: 21.1 Hours
Environment
Temp: -196 °C
Axial Tilt: 37.5 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (95)
Outer Limit: 93,518,417 km
- M1: 113,395 km (0.079 R)
- M2: 175,927 km (0.114 R)
- M3: 299,495 km (0.096 R)
- M4: 507,436 km (0.119 R)
- M5: 1,221,167 km (0.118 R)
- M6: 1,826,889 km (0.084 R)
- M7: 2,024,209 km (0.113 R)
- M8: 2,403,589 km (0.077 R)
- M9: 3,031,601 km (0.117 R)
- M10: 3,186,435 km (0.116 R)
- M11: 5,280,655 km (0.097 R)
- M12: 5,607,826 km (0.113 R)
- M13: 6,183,628 km (0.112 R)
- M14: 6,232,397 km (0.078 R)
- M15: 6,281,465 km (0.099 R)
- M16: 6,330,533 km (0.068 R)
- M17: 6,379,751 km (0.075 R)
- M18: 6,577,968 km (0.097 R)
- M19: 6,778,130 km (0.101 R)
- M20: 6,929,523 km (0.091 R)
- M21: 7,494,255 km (0.074 R)
- M22: 8,942,063 km (0.081 R)
- M23: 10,356,661 km (0.099 R)
- M24: 11,060,070 km (0.115 R)
- M25: 11,297,930 km (0.1 R)
- M26: 11,537,437 km (0.084 R)
- M27: 12,327,613 km (0.056 R)
- M28: 12,389,097 km (0.105 R)
- M29: 12,947,097 km (0.046 R)
- M30: 13,386,765 km (0.104 R)
- M31: 14,216,286 km (0.071 R)
- M32: 14,539,716 km (0.092 R)
- M33: 14,865,540 km (0.106 R)
- M34: 14,996,588 km (0.093 R)
- M35: 15,127,935 km (0.059 R)
- M36: 15,193,758 km (0.112 R)
- M37: 15,657,362 km (0.1 R)
- M38: 17,007,333 km (0.078 R)
- M39: 17,350,511 km (0.119 R)
- M40: 18,183,621 km (0.093 R)
- M41: 18,323,794 km (0.085 R)
- M42: 18,958,688 km (0.089 R)
- M43: 19,172,014 km (0.083 R)
- M44: 19,529,104 km (0.041 R)
- M45: 19,600,911 km (0.104 R)
- M46: 20,032,950 km (0.107 R)
- M47: 20,105,206 km (0.082 R)
- M48: 22,539,762 km (0.114 R)
- M49: 23,447,821 km (0.082 R)
- M50: 23,600,261 km (0.108 R)
- M51: 23,982,932 km (0.094 R)
- M52: 24,290,655 km (0.115 R)
- M53: 25,065,422 km (0.076 R)
- M54: 26,401,032 km (0.092 R)
- M55: 27,598,563 km (0.109 R)
- M56: 28,001,729 km (0.082 R)
- M57: 30,377,942 km (0.112 R)
- M58: 34,190,593 km (0.092 R)
- M59: 35,058,111 km (0.097 R)
- M60: 35,232,543 km (0.102 R)
- M61: 35,494,638 km (0.07 R)
- M62: 36,108,737 km (0.106 R)
- M63: 36,196,701 km (0.086 R)
- M64: 36,726,277 km (0.077 R)
- M65: 37,971,829 km (0.113 R)
- M66: 38,061,438 km (0.05 R)
- M67: 38,420,024 km (0.119 R)
- M68: 39,775,231 km (0.091 R)
- M69: 39,956,993 km (0.093 R)
- M70: 40,048,098 km (0.074 R)
- M71: 40,412,818 km (0.109 R)
- M72: 41,053,994 km (0.106 R)
- M73: 43,651,761 km (0.077 R)
- M74: 46,397,780 km (0.11 R)
- M75: 50,177,819 km (0.1 R)
- M76: 50,571,111 km (0.12 R)
- M77: 51,261,805 km (0.113 R)
- M78: 51,360,689 km (0.098 R)
- M79: 51,558,757 km (0.119 R)
- M80: 54,963,754 km (0.072 R)
- M81: 56,080,801 km (0.094 R)
- M82: 56,898,054 km (0.095 R)
- M83: 57,924,894 km (0.093 R)
- M84: 58,131,040 km (0.085 R)
- M85: 58,647,452 km (0.119 R)
- M86: 59,476,822 km (0.113 R)
- M87: 60,728,059 km (0.051 R)
- M88: 61,042,364 km (0.055 R)
- M89: 64,427,016 km (0.111 R)
- M90: 64,961,379 km (0.053 R)
- M91: 67,655,039 km (0.106 R)
- M92: 70,935,271 km (0.044 R)
- M93: 71,818,647 km (0.071 R)
- M94: 72,705,762 km (0.115 R)
- M95: 74,715,011 km (0.047 R)
Planet 10 - Ice Giant
Semi-Major Axis: 19.27 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 548.9
Radius: 3.8
Gravity: 38.01 G
Time & Orbit
Eccentricity (e): 0.013
Orbit Range: 19.02 AU - 19.52 AU
Year: 30443 Days
Day: 19.9 Hours
Environment
Temp: -191 °C
Axial Tilt: 38.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (95)
Outer Limit: 93,518,417 km
- M1: 50,265 km (0.109 R)
- M2: 170,093 km (0.068 R)
- M3: 202,107 km (0.037 R)
- M4: 236,365 km (0.084 R)
- M5: 352,303 km (0.115 R)
- M6: 557,402 km (0.082 R)
- M7: 633,248 km (0.088 R)
- M8: 685,757 km (0.076 R)
- M9: 3,410,981 km (0.083 R)
- M10: 3,645,102 km (0.094 R)
- M11: 3,884,309 km (0.094 R)
- M12: 3,932,778 km (0.09 R)
- M13: 3,981,398 km (0.077 R)
- M14: 4,030,316 km (0.104 R)
- M15: 4,227,785 km (0.032 R)
- M16: 4,580,986 km (0.069 R)
- M17: 5,048,928 km (0.056 R)
- M18: 6,255,136 km (0.102 R)
- M19: 8,096,087 km (0.041 R)
- M20: 8,407,550 km (0.025 R)
- M21: 8,978,266 km (0.066 R)
- M22: 9,430,650 km (0.07 R)
- M23: 9,758,269 km (0.095 R)
- M24: 10,424,877 km (0.063 R)
- M25: 10,492,346 km (0.114 R)
- M26: 10,695,500 km (0.11 R)
- M27: 11,871,638 km (0.113 R)
- M28: 12,083,469 km (0.115 R)
- M29: 14,343,593 km (0.086 R)
- M30: 15,714,359 km (0.085 R)
- M31: 15,791,701 km (0.115 R)
- M32: 16,024,625 km (0.113 R)
- M33: 17,525,540 km (0.108 R)
- M34: 17,847,176 km (0.084 R)
- M35: 19,484,674 km (0.102 R)
- M36: 20,489,972 km (0.115 R)
- M37: 21,254,865 km (0.076 R)
- M38: 21,511,875 km (0.098 R)
- M39: 22,115,801 km (0.034 R)
- M40: 24,049,354 km (0.035 R)
- M41: 24,586,111 km (0.116 R)
- M42: 24,675,870 km (0.083 R)
- M43: 24,855,836 km (0.108 R)
- M44: 25,853,654 km (0.088 R)
- M45: 27,607,539 km (0.106 R)
- M46: 28,829,454 km (0.107 R)
- M47: 29,877,238 km (0.089 R)
- M48: 31,520,870 km (0.109 R)
- M49: 31,618,408 km (0.043 R)
- M50: 32,599,770 km (0.081 R)
- M51: 32,698,504 km (0.072 R)
- M52: 32,995,157 km (0.112 R)
- M53: 34,693,242 km (0.082 R)
- M54: 34,793,922 km (0.11 R)
- M55: 34,894,751 km (0.117 R)
- M56: 35,806,998 km (0.099 R)
- M57: 36,112,776 km (0.087 R)
- M58: 36,726,876 km (0.112 R)
- M59: 37,551,160 km (0.078 R)
- M60: 38,069,367 km (0.062 R)
- M61: 38,485,698 km (0.071 R)
- M62: 39,533,033 km (0.055 R)
- M63: 40,695,857 km (0.059 R)
- M64: 43,271,633 km (0.12 R)
- M65: 43,597,307 km (0.066 R)
- M66: 44,360,406 km (0.111 R)
- M67: 44,908,234 km (0.112 R)
- M68: 48,579,066 km (0.117 R)
- M69: 49,256,745 km (0.099 R)
- M70: 50,165,252 km (0.029 R)
- M71: 52,576,172 km (0.115 R)
- M72: 53,155,714 km (0.071 R)
- M73: 56,677,397 km (0.038 R)
- M74: 56,796,028 km (0.097 R)
- M75: 58,346,311 km (0.108 R)
- M76: 61,244,919 km (0.116 R)
- M77: 61,610,537 km (0.054 R)
- M78: 63,449,394 km (0.093 R)
- M79: 65,555,133 km (0.075 R)
- M80: 66,303,721 km (0.077 R)
- M81: 66,553,849 km (0.032 R)
- M82: 68,946,218 km (0.113 R)
- M83: 69,326,496 km (0.073 R)
- M84: 69,834,680 km (0.114 R)
- M85: 70,344,060 km (0.058 R)
- M86: 71,238,506 km (0.099 R)
- M87: 72,265,346 km (0.117 R)
- M88: 78,263,472 km (0.081 R)
- M89: 78,924,994 km (0.095 R)
- M90: 80,653,747 km (0.112 R)
- M91: 83,877,731 km (0.11 R)
- M92: 84,961,717 km (0.116 R)
- M93: 90,035,179 km (0.05 R)
- M94: 90,728,416 km (0.117 R)
- M95: 91,006,069 km (0.1 R)
Kuiper Belt
Range: 30.5 - 58.5 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 312 - 14,117 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.