🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.79 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.15

Radius: 1.77

Gravity: 1.32 G

Time & Orbit

Eccentricity (e): 0.028

Orbit Range: 0.77 AU - 0.81 AU

Year: 254 Days

Day: 36.9 Hours

Environment

Temp: 109 °C

Axial Tilt: 11.8 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.69 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.07

Radius: 1.75

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.225

Orbit Range: 1.31 AU - 2.07 AU

Year: 795 Days

Day: 43.5 Hours

Environment

Temp: -49 °C

Axial Tilt: 31.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 2.5 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.62

Radius: 0.83

Gravity: 0.9 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 2.34 AU - 2.67 AU

Year: 1430 Days

Day: 17.9 Hours

Environment

Temp: -92 °C

Axial Tilt: 39 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 2.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.76

Radius: 1.7

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 2.03 AU - 3.17 AU

Year: 1516 Days

Day: 25.9 Hours

Environment

Temp: -92 °C

Axial Tilt: 17.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 99,484,802 km

• M1: 83,476 km (0.056 R)
• M2: 1,009,337 km (0.117 R)

Planet 5 - Terrestrial

Semi-Major Axis: 4.67 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.94

Radius: 1.54

Gravity: 1.24 G

Time & Orbit

Eccentricity (e): 0.068

Orbit Range: 4.35 AU - 4.99 AU

Year: 3650 Days

Day: 14.5 Hours

Environment

Temp: -131 °C

Axial Tilt: 26.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 99,484,802 km

• M1: 88,113 km (0.115 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.18 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 559.7

Radius: 14.5

Gravity: 2.66 G

Time & Orbit

Eccentricity (e): 0.163

Orbit Range: 4.34 AU - 6.02 AU

Year: 4264 Days

Day: 5.1 Hours

Environment

Temp: -143 °C

Axial Tilt: 0.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 99,484,802 km

• M1: 201,808 km (0.097 R)
• M2: 374,443 km (0.096 R)
• M3: 532,419 km (0.091 R)
• M4: 627,264 km (0.105 R)
• M5: 953,537 km (0.086 R)
• M6: 1,163,273 km (0.116 R)
• M7: 1,529,040 km (0.027 R)
• M8: 1,823,748 km (0.095 R)
• M9: 2,073,127 km (0.091 R)
• M10: 2,502,623 km (0.079 R)
• M11: 3,015,145 km (0.079 R)
• M12: 3,180,900 km (0.103 R)
• M13: 3,696,863 km (0.072 R)
• M14: 3,834,941 km (0.109 R)
• M15: 4,035,403 km (0.084 R)
• M16: 4,280,593 km (0.088 R)
• M17: 4,467,740 km (0.081 R)
• M18: 4,572,908 km (0.098 R)
• M19: 4,764,243 km (0.104 R)
• M20: 5,023,646 km (0.088 R)
• M21: 5,133,152 km (0.092 R)
• M22: 5,399,286 km (0.048 R)
• M23: 5,784,052 km (0.096 R)
• M24: 6,918,752 km (0.098 R)
• M25: 7,287,361 km (0.115 R)
• M26: 7,436,510 km (0.084 R)
• M27: 7,814,245 km (0.051 R)
• M28: 7,967,134 km (0.093 R)
• M29: 8,353,545 km (0.089 R)
• M30: 9,118,289 km (0.099 R)
• M31: 9,333,262 km (0.083 R)
• M32: 9,495,575 km (0.101 R)
• M33: 9,960,525 km (0.094 R)
• M34: 10,321,206 km (0.045 R)
• M35: 10,913,015 km (0.117 R)
• M36: 11,631,833 km (0.059 R)
• M37: 11,806,713 km (0.111 R)
• M38: 11,953,019 km (0.106 R)
• M39: 12,336,439 km (0.052 R)
• M40: 12,604,219 km (0.045 R)
• M41: 13,206,350 km (0.102 R)
• M42: 13,449,746 km (0.069 R)
• M43: 13,725,455 km (0.085 R)
• M44: 14,065,042 km (0.08 R)
• M45: 14,158,092 km (0.102 R)
• M46: 14,438,588 km (0.12 R)
• M47: 14,783,860 km (0.063 R)
• M48: 15,068,545 km (0.046 R)
• M49: 15,546,809 km (0.069 R)
• M50: 15,803,968 km (0.118 R)
• M51: 15,933,071 km (0.118 R)
• M52: 16,583,971 km (0.112 R)
• M53: 17,376,541 km (0.066 R)
• M54: 17,743,953 km (0.101 R)
• M55: 18,012,780 km (0.086 R)
• M56: 18,215,336 km (0.078 R)
• M57: 18,520,516 km (0.069 R)
• M58: 18,622,691 km (0.1 R)
• M59: 18,725,016 km (0.072 R)
• M60: 19,101,703 km (0.118 R)
• M61: 19,446,377 km (0.113 R)
• M62: 20,352,042 km (0.111 R)
• M63: 20,916,325 km (0.029 R)
• M64: 21,844,131 km (0.103 R)
• M65: 23,187,670 km (0.086 R)
• M66: 23,334,575 km (0.095 R)
• M67: 23,776,936 km (0.099 R)
• M68: 24,820,082 km (0.098 R)

Planet 7 - Gas Giant

Semi-Major Axis: 7.61 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 307.6

Radius: 14.3

Gravity: 1.5 G

Time & Orbit

Eccentricity (e): 0.239

Orbit Range: 5.79 AU - 9.43 AU

Year: 7592 Days

Day: 12 Hours

Environment

Temp: -155 °C

Axial Tilt: 28.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (62)

Outer Limit: 99,484,802 km

• M1: 178,769 km (0.039 R)
• M2: 359,932 km (0.049 R)
• M3: 527,632 km (0.032 R)
• M4: 877,990 km (0.102 R)
• M5: 1,053,019 km (0.033 R)
• M6: 1,167,163 km (0.084 R)
• M7: 1,408,913 km (0.085 R)
• M8: 1,584,989 km (0.108 R)
• M9: 1,768,696 km (0.038 R)
• M10: 2,269,101 km (0.075 R)
• M11: 2,497,088 km (0.081 R)
• M12: 2,732,854 km (0.118 R)
• M13: 3,269,013 km (0.049 R)
• M14: 3,397,517 km (0.062 R)
• M15: 3,527,817 km (0.1 R)
• M16: 3,726,333 km (0.104 R)
• M17: 4,391,296 km (0.099 R)
• M18: 4,557,499 km (0.104 R)
• M19: 5,572,521 km (0.071 R)
• M20: 5,908,966 km (0.114 R)
• M21: 6,358,807 km (0.045 R)
• M22: 6,601,455 km (0.049 R)
• M23: 6,819,868 km (0.101 R)
• M24: 7,068,350 km (0.03 R)
• M25: 7,947,387 km (0.088 R)
• M26: 9,284,493 km (0.079 R)
• M27: 9,376,047 km (0.053 R)
• M28: 10,818,619 km (0.118 R)
• M29: 11,238,839 km (0.08 R)
• M30: 11,500,187 km (0.117 R)
• M31: 12,095,437 km (0.098 R)
• M32: 12,363,217 km (0.105 R)
• M33: 12,632,942 km (0.032 R)
• M34: 12,768,627 km (0.073 R)
• M35: 13,007,086 km (0.082 R)
• M36: 13,592,612 km (0.037 R)
• M37: 13,941,026 km (0.105 R)
• M38: 14,046,193 km (0.068 R)
• M39: 14,646,679 km (0.11 R)
• M40: 14,968,165 km (0.098 R)
• M41: 15,545,313 km (0.097 R)
• M42: 16,092,991 km (0.102 R)
• M43: 16,610,001 km (0.111 R)
• M44: 18,193,345 km (0.11 R)
• M45: 19,236,641 km (0.103 R)
• M46: 21,542,991 km (0.111 R)
• M47: 22,235,480 km (0.1 R)
• M48: 22,358,449 km (0.113 R)
• M49: 22,893,860 km (0.039 R)
• M50: 23,183,930 km (0.099 R)
• M51: 23,308,545 km (0.113 R)
• M52: 23,935,510 km (0.073 R)
• M53: 24,061,471 km (0.098 R)
• M54: 24,356,478 km (0.111 R)
• M55: 24,695,018 km (0.071 R)
• M56: 24,992,419 km (0.058 R)
• M57: 26,454,439 km (0.115 R)
• M58: 26,889,768 km (0.113 R)
• M59: 27,415,156 km (0.079 R)
• M60: 28,520,834 km (0.101 R)
• M61: 29,056,694 km (0.1 R)
• M62: 30,365,525 km (0.089 R)

Planet 8 - Gas Giant

Semi-Major Axis: 7.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 959.7

Radius: 13

Gravity: 5.68 G

Time & Orbit

Eccentricity (e): 0.029

Orbit Range: 7.61 AU - 8.07 AU

Year: 7939 Days

Day: 11 Hours

Environment

Temp: -155 °C

Axial Tilt: 16.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 99,484,802 km

• M1: 173,234 km (0.072 R)
• M2: 291,267 km (0.104 R)
• M3: 387,907 km (0.041 R)
• M4: 705,055 km (0.092 R)
• M5: 992,283 km (0.08 R)
• M6: 1,179,130 km (0.101 R)
• M7: 1,357,900 km (0.083 R)
• M8: 1,589,029 km (0.076 R)
• M9: 1,743,114 km (0.12 R)
• M10: 1,856,360 km (0.056 R)
• M11: 1,972,149 km (0.113 R)
• M12: 2,114,416 km (0.114 R)
• M13: 2,309,492 km (0.07 R)
• M14: 2,409,423 km (0.051 R)
• M15: 2,850,438 km (0.082 R)
• M16: 3,459,002 km (0.113 R)
• M17: 3,545,170 km (0.104 R)
• M18: 3,661,109 km (0.11 R)
• M19: 3,808,014 km (0.051 R)
• M20: 3,897,025 km (0.096 R)
• M21: 5,084,981 km (0.11 R)
• M22: 6,554,930 km (0.072 R)
• M23: 7,207,326 km (0.114 R)
• M24: 7,429,329 km (0.117 R)
• M25: 8,070,955 km (0.097 R)
• M26: 8,573,604 km (0.034 R)
• M27: 9,568,878 km (0.057 R)
• M28: 9,772,481 km (0.114 R)
• M29: 10,142,287 km (0.101 R)
• M30: 11,023,269 km (0.032 R)
• M31: 11,193,810 km (0.118 R)
• M32: 11,322,315 km (0.108 R)
• M33: 11,710,970 km (0.115 R)
• M34: 13,764,650 km (0.111 R)
• M35: 14,927,025 km (0.092 R)
• M36: 15,115,818 km (0.086 R)
• M37: 16,314,396 km (0.101 R)
• M38: 17,394,343 km (0.098 R)
• M39: 17,842,688 km (0.056 R)
• M40: 17,942,918 km (0.066 R)
• M41: 18,194,243 km (0.084 R)
• M42: 18,751,046 km (0.119 R)
• M43: 19,057,273 km (0.09 R)
• M44: 19,985,528 km (0.065 R)
• M45: 21,193,231 km (0.066 R)
• M46: 21,405,660 km (0.084 R)
• M47: 21,565,431 km (0.034 R)
• M48: 22,424,422 km (0.06 R)
• M49: 22,640,890 km (0.05 R)
• M50: 23,458,891 km (0.08 R)
• M51: 24,009,710 km (0.108 R)
• M52: 25,236,263 km (0.109 R)
• M53: 26,198,028 km (0.09 R)
• M54: 26,540,457 km (0.06 R)
• M55: 26,826,788 km (0.06 R)
• M56: 28,625,403 km (0.072 R)
• M57: 28,978,005 km (0.113 R)
• M58: 29,273,012 km (0.099 R)
• M59: 29,509,676 km (0.103 R)
• M60: 29,746,938 km (0.102 R)
• M61: 31,668,224 km (0.054 R)
• M62: 32,032,943 km (0.108 R)
• M63: 33,443,950 km (0.091 R)
• M64: 34,875,004 km (0.059 R)
• M65: 35,629,575 km (0.114 R)
• M66: 35,882,396 km (0.078 R)
• M67: 38,183,809 km (0.099 R)
• M68: 38,377,688 km (0.098 R)
• M69: 38,636,792 km (0.053 R)
• M70: 38,766,493 km (0.1 R)
• M71: 39,287,094 km (0.104 R)
• M72: 39,744,414 km (0.098 R)
• M73: 40,072,183 km (0.098 R)
• M74: 40,466,673 km (0.115 R)
• M75: 41,458,507 km (0.081 R)
• M76: 41,591,499 km (0.05 R)
• M77: 41,857,634 km (0.034 R)
• M78: 42,324,678 km (0.039 R)
• M79: 43,331,472 km (0.034 R)
• M80: 45,231,814 km (0.043 R)
• M81: 45,642,610 km (0.027 R)

Planet 9 - Gas Giant

Semi-Major Axis: 10.46 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 146.7

Radius: 12.4

Gravity: 0.95 G

Time & Orbit

Eccentricity (e): 0.167

Orbit Range: 8.71 AU - 12.21 AU

Year: 12235 Days

Day: 6.1 Hours

Environment

Temp: -169 °C

Axial Tilt: 10.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 99,484,802 km

• M1: 155,283 km (0.11 R)
• M2: 239,656 km (0.051 R)
• M3: 332,406 km (0.05 R)
• M4: 455,526 km (0.081 R)
• M5: 575,353 km (0.045 R)
• M6: 695,331 km (0.096 R)
• M7: 824,883 km (0.109 R)
• M8: 977,622 km (0.056 R)
• M9: 1,110,315 km (0.049 R)
• M10: 1,511,537 km (0.068 R)
• M11: 1,737,878 km (0.047 R)
• M12: 2,089,134 km (0.117 R)
• M13: 2,442,784 km (0.086 R)
• M14: 3,074,535 km (0.085 R)
• M15: 3,184,789 km (0.111 R)
• M16: 3,500,441 km (0.09 R)
• M17: 3,755,655 km (0.084 R)
• M18: 4,017,152 km (0.116 R)
• M19: 4,333,850 km (0.067 R)
• M20: 4,482,850 km (0.092 R)
• M21: 4,914,290 km (0.095 R)
• M22: 5,121,932 km (0.105 R)
• M23: 5,680,979 km (0.088 R)
• M24: 6,203,674 km (0.118 R)
• M25: 6,343,847 km (0.08 R)
• M26: 6,541,765 km (0.06 R)
• M27: 7,502,632 km (0.109 R)
• M28: 7,832,795 km (0.111 R)
• M29: 8,106,409 km (0.081 R)
• M30: 8,383,315 km (0.101 R)
• M31: 8,631,947 km (0.071 R)
• M32: 9,489,442 km (0.075 R)
• M33: 9,651,307 km (0.086 R)
• M34: 10,010,491 km (0.099 R)
• M35: 10,843,153 km (0.101 R)
• M36: 11,941,201 km (0.092 R)
• M37: 12,221,248 km (0.076 R)
• M38: 12,823,679 km (0.086 R)
• M39: 12,966,844 km (0.084 R)
• M40: 13,110,608 km (0.102 R)
• M41: 13,947,009 km (0.103 R)
• M42: 14,131,164 km (0.089 R)
• M43: 14,242,166 km (0.085 R)
• M44: 14,502,018 km (0.036 R)
• M45: 14,800,914 km (0.093 R)
• M46: 14,951,110 km (0.087 R)
• M47: 15,290,997 km (0.08 R)
• M48: 15,480,836 km (0.113 R)
• M49: 15,978,399 km (0.053 R)
• M50: 16,519,943 km (0.088 R)
• M51: 16,636,779 km (0.096 R)
• M52: 17,383,273 km (0.104 R)
• M53: 17,502,203 km (0.071 R)
• M54: 17,860,340 km (0.082 R)
• M55: 18,020,410 km (0.095 R)
• M56: 18,100,594 km (0.096 R)
• M57: 18,624,636 km (0.068 R)
• M58: 18,990,403 km (0.03 R)
• M59: 19,153,614 km (0.071 R)
• M60: 19,399,553 km (0.117 R)
• M61: 19,522,821 km (0.108 R)
• M62: 19,852,984 km (0.081 R)
• M63: 20,351,743 km (0.08 R)
• M64: 22,560,107 km (0.082 R)
• M65: 23,080,408 km (0.082 R)
• M66: 23,211,157 km (0.072 R)
• M67: 23,342,055 km (0.054 R)
• M68: 24,487,376 km (0.057 R)
• M69: 24,620,818 km (0.12 R)
• M70: 25,380,924 km (0.089 R)
• M71: 27,199,735 km (0.043 R)
• M72: 28,451,121 km (0.097 R)
• M73: 29,013,161 km (0.04 R)
• M74: 29,107,258 km (0.088 R)
• M75: 29,295,751 km (0.077 R)
• M76: 29,626,362 km (0.096 R)
• M77: 29,958,320 km (0.073 R)
• M78: 31,733,299 km (0.116 R)
• M79: 32,170,274 km (0.062 R)
• M80: 32,316,282 km (0.102 R)

Planet 10 - Ice Giant

Semi-Major Axis: 16.79 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 989.3

Radius: 4.5

Gravity: 48.85 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 13.08 AU - 20.5 AU

Year: 24881 Days

Day: 18.6 Hours

Environment

Temp: -197 °C

Axial Tilt: 2.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 99,484,802 km

• M1: 59,091 km (0.093 R)
• M2: 186,698 km (0.111 R)
• M3: 1,409,062 km (0.117 R)
• M4: 1,480,869 km (0.109 R)
• M5: 2,098,260 km (0.088 R)
• M6: 2,180,389 km (0.097 R)
• M7: 2,305,752 km (0.117 R)
• M8: 2,740,483 km (0.07 R)
• M9: 3,438,956 km (0.056 R)
• M10: 5,097,847 km (0.115 R)
• M11: 5,320,299 km (0.059 R)
• M12: 5,948,161 km (0.066 R)
• M13: 6,539,073 km (0.073 R)
• M14: 7,649,089 km (0.06 R)
• M15: 7,839,676 km (0.071 R)
• M16: 8,096,237 km (0.1 R)
• M17: 8,160,863 km (0.115 R)
• M18: 8,225,639 km (0.063 R)
• M19: 10,385,982 km (0.08 R)
• M20: 11,600,567 km (0.086 R)
• M21: 12,559,190 km (0.037 R)
• M22: 13,466,501 km (0.055 R)
• M23: 13,619,689 km (0.095 R)
• M24: 15,024,862 km (0.106 R)
• M25: 16,068,158 km (0.083 R)
• M26: 16,475,513 km (0.1 R)
• M27: 16,639,472 km (0.108 R)
• M28: 17,383,721 km (0.111 R)
• M29: 18,478,030 km (0.118 R)
• M30: 18,819,113 km (0.097 R)
• M31: 19,421,095 km (0.096 R)
• M32: 20,292,054 km (0.09 R)
• M33: 20,379,868 km (0.095 R)
• M34: 22,162,027 km (0.1 R)
• M35: 22,615,309 km (0.071 R)
• M36: 24,272,404 km (0.104 R)
• M37: 27,994,100 km (0.072 R)
• M38: 28,680,754 km (0.064 R)
• M39: 30,070,518 km (0.103 R)
• M40: 31,787,304 km (0.068 R)
• M41: 34,578,501 km (0.102 R)
• M42: 36,269,256 km (0.072 R)
• M43: 38,094,948 km (0.057 R)
• M44: 38,420,174 km (0.036 R)
• M45: 38,637,540 km (0.092 R)
• M46: 38,746,297 km (0.097 R)
• M47: 40,833,487 km (0.111 R)
• M48: 42,058,394 km (0.06 R)
• M49: 42,619,237 km (0.072 R)
• M50: 42,731,734 km (0.094 R)
• M51: 43,634,857 km (0.097 R)
• M52: 43,861,647 km (0.101 R)
• M53: 44,202,580 km (0.106 R)
• M54: 45,345,209 km (0.083 R)
• M55: 45,459,951 km (0.1 R)
• M56: 45,574,842 km (0.085 R)
• M57: 46,381,922 km (0.097 R)
• M58: 47,776,324 km (0.108 R)
• M59: 50,487,037 km (0.071 R)
• M60: 50,605,968 km (0.11 R)
• M61: 50,725,048 km (0.107 R)
• M62: 51,082,886 km (0.096 R)
• M63: 51,681,128 km (0.12 R)
• M64: 57,292,245 km (0.108 R)
• M65: 58,412,433 km (0.115 R)
• M66: 60,421,832 km (0.109 R)
• M67: 61,561,917 km (0.048 R)
• M68: 61,689,076 km (0.117 R)
• M69: 62,453,670 km (0.094 R)
• M70: 63,221,257 km (0.089 R)
• M71: 65,024,809 km (0.115 R)
• M72: 65,932,868 km (0.112 R)
• M73: 66,062,868 km (0.065 R)
• M74: 70,402,553 km (0.069 R)
• M75: 71,201,406 km (0.101 R)
• M76: 72,137,290 km (0.095 R)
• M77: 74,021,176 km (0.097 R)
• M78: 74,562,272 km (0.04 R)
• M79: 75,376,533 km (0.071 R)
• M80: 77,974,449 km (0.116 R)
• M81: 79,353,592 km (0.102 R)
• M82: 79,630,348 km (0.055 R)
• M83: 84,243,348 km (0.117 R)
• M84: 86,226,417 km (0.028 R)
• M85: 88,654,989 km (0.108 R)
• M86: 89,373,508 km (0.065 R)
• M87: 91,540,732 km (0.064 R)
• M88: 92,412,589 km (0.068 R)
• M89: 92,558,147 km (0.081 R)
• M90: 95,191,219 km (0.077 R)
• M91: 95,632,384 km (0.058 R)
• M92: 96,221,799 km (0.054 R)
• M93: 97,997,077 km (0.046 R)
• M94: 98,294,029 km (0.108 R)

Kuiper Belt

Range: 30.3 - 57.3 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 160 - 11,758 AU

Composition

Type: Cometary Reservoir

System's final boundary, containing trillions of icy planetesimals.

Gravitational Limit