🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.98

Radius: 1.74

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.007

Orbit Range: 0.6 AU - 0.6 AU

Year: 164 Days

Day: 43 Hours

Environment

Temp: 175 °C

Axial Tilt: 6.5 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.01 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.8

Radius: 1.87

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.024

Orbit Range: 0.99 AU - 1.03 AU

Year: 358 Days

Day: 25.5 Hours

Environment

Temp: 120 °C

Axial Tilt: 23.8 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 45,902,241 km

• M1: 738,714 km (0.093 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.23 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.48

Radius: 0.75

Gravity: 0.85 G

Time & Orbit

Eccentricity (e): 0.207

Orbit Range: 0.98 AU - 1.48 AU

Year: 482 Days

Day: 33.6 Hours

Environment

Temp: 16 °C

Axial Tilt: 24.3 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 4 - Terrestrial

Semi-Major Axis: 2.07 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.44

Radius: 0.72

Gravity: 0.85 G

Time & Orbit

Eccentricity (e): 0.186

Orbit Range: 1.68 AU - 2.46 AU

Year: 1052 Days

Day: 24.8 Hours

Environment

Temp: -52 °C

Axial Tilt: 6.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 4.67 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.71

Radius: 0.87

Gravity: 0.94 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 4.31 AU - 5.03 AU

Year: 3563 Days

Day: 17.4 Hours

Environment

Temp: -136 °C

Axial Tilt: 37.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 5.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 218.4

Radius: 9.8

Gravity: 2.27 G

Time & Orbit

Eccentricity (e): 0.197

Orbit Range: 4.43 AU - 6.61 AU

Year: 4579 Days

Day: 8.3 Hours

Environment

Temp: -141 °C

Axial Tilt: 6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 45,902,241 km

• M1: 189,241 km (0.117 R)
• M2: 384,915 km (0.086 R)
• M3: 495,319 km (0.088 R)
• M4: 836,850 km (0.115 R)
• M5: 976,276 km (0.027 R)
• M6: 1,123,779 km (0.109 R)
• M7: 1,441,226 km (0.101 R)
• M8: 1,635,404 km (0.114 R)
• M9: 1,773,782 km (0.115 R)
• M10: 1,838,109 km (0.072 R)
• M11: 2,076,119 km (0.061 R)
• M12: 2,538,526 km (0.111 R)
• M13: 2,971,014 km (0.084 R)
• M14: 3,188,080 km (0.067 R)
• M15: 3,251,061 km (0.096 R)
• M16: 3,410,383 km (0.054 R)
• M17: 3,491,016 km (0.051 R)
• M18: 3,621,465 km (0.118 R)
• M19: 3,736,955 km (0.077 R)
• M20: 3,803,526 km (0.089 R)
• M21: 4,142,215 km (0.091 R)
• M22: 4,402,665 km (0.092 R)
• M23: 4,740,158 km (0.108 R)
• M24: 4,812,414 km (0.072 R)
• M25: 4,939,572 km (0.118 R)
• M26: 5,573,119 km (0.062 R)
• M27: 5,822,200 km (0.102 R)
• M28: 5,899,542 km (0.092 R)
• M29: 6,153,409 km (0.101 R)
• M30: 6,390,971 km (0.107 R)
• M31: 6,571,236 km (0.106 R)
• M32: 6,672,065 km (0.06 R)
• M33: 6,854,874 km (0.111 R)
• M34: 7,455,060 km (0.078 R)
• M35: 7,623,657 km (0.118 R)
• M36: 7,793,451 km (0.119 R)
• M37: 7,964,591 km (0.091 R)
• M38: 9,106,920 km (0.035 R)
• M39: 9,628,568 km (0.109 R)
• M40: 10,417,248 km (0.035 R)
• M41: 11,275,042 km (0.029 R)
• M42: 11,347,447 km (0.033 R)
• M43: 11,444,387 km (0.107 R)
• M44: 11,663,398 km (0.062 R)
• M45: 11,933,123 km (0.1 R)
• M46: 12,081,075 km (0.072 R)
• M47: 12,428,591 km (0.086 R)
• M48: 12,578,638 km (0.09 R)
• M49: 12,754,415 km (0.057 R)
• M50: 13,006,787 km (0.107 R)
• M51: 13,108,364 km (0.111 R)
• M52: 13,671,001 km (0.054 R)
• M53: 14,007,297 km (0.099 R)
• M54: 14,215,538 km (0.055 R)
• M55: 14,477,334 km (0.075 R)
• M56: 14,820,063 km (0.085 R)
• M57: 14,926,128 km (0.096 R)
• M58: 15,540,376 km (0.092 R)
• M59: 15,783,174 km (0.099 R)
• M60: 15,945,637 km (0.093 R)
• M61: 16,108,549 km (0.102 R)
• M62: 16,491,220 km (0.119 R)
• M63: 16,628,551 km (0.11 R)
• M64: 16,793,857 km (0.027 R)
• M65: 16,987,437 km (0.113 R)
• M66: 17,600,788 km (0.05 R)
• M67: 18,164,622 km (0.115 R)
• M68: 18,505,705 km (0.075 R)
• M69: 18,791,587 km (0.113 R)
• M70: 18,992,646 km (0.037 R)
• M71: 19,194,304 km (0.115 R)
• M72: 19,309,944 km (0.03 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 270.3

Radius: 13.9

Gravity: 1.4 G

Time & Orbit

Eccentricity (e): 0.172

Orbit Range: 4.71 AU - 6.67 AU

Year: 4793 Days

Day: 11.5 Hours

Environment

Temp: -137 °C

Axial Tilt: 31.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (53)

Outer Limit: 45,902,241 km

• M1: 267,631 km (0.078 R)
• M2: 448,345 km (0.1 R)
• M3: 730,486 km (0.086 R)
• M4: 818,151 km (0.116 R)
• M5: 1,027,588 km (0.099 R)
• M6: 1,128,118 km (0.051 R)
• M7: 1,364,333 km (0.083 R)
• M8: 1,514,230 km (0.084 R)
• M9: 1,656,647 km (0.109 R)
• M10: 1,997,880 km (0.111 R)
• M11: 2,406,880 km (0.118 R)
• M12: 2,842,659 km (0.062 R)
• M13: 3,253,006 km (0.104 R)
• M14: 3,388,242 km (0.118 R)
• M15: 4,407,153 km (0.114 R)
• M16: 4,824,681 km (0.067 R)
• M17: 5,018,859 km (0.097 R)
• M18: 5,136,443 km (0.054 R)
• M19: 5,274,971 km (0.116 R)
• M20: 5,698,033 km (0.06 R)
• M21: 5,944,870 km (0.081 R)
• M22: 6,174,203 km (0.058 R)
• M23: 6,641,697 km (0.093 R)
• M24: 7,054,736 km (0.098 R)
• M25: 7,164,840 km (0.115 R)
• M26: 7,792,104 km (0.094 R)
• M27: 7,928,837 km (0.079 R)
• M28: 8,251,071 km (0.098 R)
• M29: 9,195,332 km (0.089 R)
• M30: 9,558,257 km (0.079 R)
• M31: 10,954,753 km (0.03 R)
• M32: 11,443,040 km (0.107 R)
• M33: 11,807,461 km (0.06 R)
• M34: 12,654,633 km (0.114 R)
• M35: 13,085,625 km (0.092 R)
• M36: 14,295,872 km (0.1 R)
• M37: 14,660,143 km (0.117 R)
• M38: 14,801,213 km (0.082 R)
• M39: 15,027,705 km (0.092 R)
• M40: 16,851,303 km (0.027 R)
• M41: 17,474,677 km (0.108 R)
• M42: 17,654,194 km (0.108 R)
• M43: 17,864,379 km (0.041 R)
• M44: 18,226,705 km (0.094 R)
• M45: 18,621,943 km (0.073 R)
• M46: 18,713,497 km (0.11 R)
• M47: 18,866,535 km (0.036 R)
• M48: 19,204,627 km (0.086 R)
• M49: 19,824,560 km (0.049 R)
• M50: 19,918,059 km (0.109 R)
• M51: 20,136,921 km (0.08 R)
• M52: 20,231,018 km (0.099 R)
• M53: 21,338,939 km (0.046 R)

Planet 8 - Gas Giant

Semi-Major Axis: 10.51 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 437.6

Radius: 13.4

Gravity: 2.44 G

Time & Orbit

Eccentricity (e): 0.032

Orbit Range: 10.17 AU - 10.85 AU

Year: 12031 Days

Day: 12.5 Hours

Environment

Temp: -173 °C

Axial Tilt: 38.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 45,902,241 km

• M1: 220,358 km (0.12 R)
• M2: 396,434 km (0.112 R)
• M3: 671,395 km (0.108 R)
• M4: 1,065,586 km (0.061 R)
• M5: 1,319,752 km (0.03 R)
• M6: 1,616,106 km (0.072 R)
• M7: 1,864,289 km (0.066 R)
• M8: 1,981,274 km (0.096 R)
• M9: 2,076,718 km (0.114 R)
• M10: 2,173,956 km (0.085 R)
• M11: 2,423,635 km (0.074 R)
• M12: 2,735,846 km (0.037 R)
• M13: 2,842,808 km (0.044 R)
• M14: 3,089,046 km (0.102 R)
• M15: 4,359,731 km (0.109 R)
• M16: 4,708,593 km (0.056 R)
• M17: 4,837,846 km (0.044 R)
• M18: 5,232,485 km (0.12 R)
• M19: 5,603,487 km (0.11 R)
• M20: 6,731,156 km (0.1 R)
• M21: 7,508,766 km (0.077 R)
• M22: 8,589,760 km (0.103 R)
• M23: 10,217,385 km (0.048 R)
• M24: 10,724,073 km (0.069 R)
• M25: 11,412,522 km (0.072 R)
• M26: 11,499,588 km (0.042 R)
• M27: 12,832,057 km (0.032 R)
• M28: 13,241,356 km (0.093 R)
• M29: 13,424,614 km (0.072 R)
• M30: 13,562,693 km (0.116 R)
• M31: 13,793,672 km (0.119 R)
• M32: 14,166,170 km (0.099 R)
• M33: 14,636,506 km (0.118 R)
• M34: 15,447,775 km (0.065 R)
• M35: 16,716,664 km (0.104 R)
• M36: 17,917,636 km (0.099 R)
• M37: 18,273,230 km (0.097 R)
• M38: 18,991,300 km (0.108 R)
• M39: 19,718,495 km (0.06 R)
• M40: 19,928,082 km (0.074 R)
• M41: 20,613,988 km (0.115 R)
• M42: 21,468,790 km (0.07 R)
• M43: 22,063,292 km (0.092 R)
• M44: 23,268,453 km (0.09 R)
• M45: 23,379,006 km (0.032 R)
• M46: 24,495,006 km (0.106 R)
• M47: 26,201,169 km (0.044 R)
• M48: 28,831,698 km (0.097 R)
• M49: 29,667,203 km (0.081 R)
• M50: 29,847,169 km (0.069 R)
• M51: 30,268,736 km (0.069 R)
• M52: 30,510,486 km (0.107 R)
• M53: 31,178,739 km (0.068 R)
• M54: 31,545,254 km (0.111 R)
• M55: 31,913,265 km (0.056 R)
• M56: 32,344,406 km (0.112 R)
• M57: 33,087,758 km (0.073 R)
• M58: 33,461,753 km (0.053 R)
• M59: 34,087,969 km (0.092 R)
• M60: 34,276,612 km (0.1 R)
• M61: 34,971,195 km (0.109 R)
• M62: 35,351,922 km (0.106 R)
• M63: 35,479,229 km (0.102 R)
• M64: 36,181,891 km (0.12 R)
• M65: 36,374,273 km (0.107 R)
• M66: 37,406,349 km (0.055 R)
• M67: 38,644,272 km (0.105 R)
• M68: 38,972,340 km (0.1 R)
• M69: 40,360,159 km (0.095 R)
• M70: 40,626,294 km (0.051 R)
• M71: 41,227,378 km (0.103 R)
• M72: 41,361,268 km (0.072 R)
• M73: 41,629,647 km (0.103 R)
• M74: 44,345,147 km (0.069 R)
• M75: 45,309,006 km (0.119 R)
• M76: 45,862,818 km (0.079 R)

Planet 9 - Ice Giant

Semi-Major Axis: 15.54 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 764.2

Radius: 5.7

Gravity: 23.52 G

Time & Orbit

Eccentricity (e): 0.231

Orbit Range: 11.95 AU - 19.13 AU

Year: 21631 Days

Day: 24.3 Hours

Environment

Temp: -188 °C

Axial Tilt: 33.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 45,902,241 km

• M1: 100,231 km (0.117 R)
• M2: 460,163 km (0.097 R)
• M3: 502,499 km (0.057 R)
• M4: 971,937 km (0.099 R)
• M5: 1,084,585 km (0.075 R)
• M6: 1,511,686 km (0.117 R)
• M7: 1,576,612 km (0.119 R)
• M8: 1,950,756 km (0.12 R)
• M9: 2,817,078 km (0.067 R)
• M10: 3,019,483 km (0.093 R)
• M11: 3,143,201 km (0.093 R)
• M12: 3,353,087 km (0.061 R)
• M13: 4,516,360 km (0.097 R)
• M14: 4,945,556 km (0.078 R)
• M15: 5,091,564 km (0.081 R)
• M16: 5,288,434 km (0.079 R)
• M17: 5,387,917 km (0.069 R)
• M18: 7,279,732 km (0.109 R)
• M19: 7,445,935 km (0.099 R)
• M20: 8,123,015 km (0.07 R)
• M21: 9,056,057 km (0.065 R)
• M22: 9,716,980 km (0.073 R)
• M23: 10,269,295 km (0.099 R)
• M24: 10,643,141 km (0.093 R)
• M25: 10,894,764 km (0.088 R)
• M26: 11,148,482 km (0.074 R)
• M27: 11,468,322 km (0.111 R)
• M28: 12,644,610 km (0.119 R)
• M29: 12,911,194 km (0.072 R)
• M30: 13,585,731 km (0.104 R)
• M31: 13,858,747 km (0.12 R)
• M32: 14,688,566 km (0.042 R)
• M33: 15,109,535 km (0.077 R)
• M34: 16,107,203 km (0.114 R)
• M35: 16,251,415 km (0.098 R)
• M36: 16,468,631 km (0.072 R)
• M37: 16,541,336 km (0.112 R)
• M38: 16,759,749 km (0.106 R)
• M39: 17,125,964 km (0.056 R)
• M40: 17,346,920 km (0.078 R)
• M41: 17,420,822 km (0.061 R)
• M42: 18,390,814 km (0.118 R)
• M43: 19,378,310 km (0.112 R)
• M44: 20,227,128 km (0.085 R)
• M45: 21,483,451 km (0.067 R)
• M46: 23,333,079 km (0.073 R)
• M47: 24,070,597 km (0.1 R)
• M48: 24,153,025 km (0.088 R)
• M49: 25,233,122 km (0.061 R)
• M50: 26,244,104 km (0.052 R)
• M51: 27,785,112 km (0.064 R)
• M52: 29,973,579 km (0.064 R)
• M53: 30,417,885 km (0.065 R)
• M54: 31,133,411 km (0.1 R)
• M55: 32,216,949 km (0.088 R)
• M56: 33,588,612 km (0.087 R)
• M57: 34,235,174 km (0.034 R)
• M58: 34,606,625 km (0.051 R)
• M59: 36,388,635 km (0.119 R)
• M60: 36,957,556 km (0.093 R)
• M61: 37,052,700 km (0.114 R)
• M62: 37,720,654 km (0.032 R)
• M63: 39,068,681 km (0.094 R)
• M64: 39,165,620 km (0.105 R)
• M65: 39,262,560 km (0.063 R)
• M66: 39,359,649 km (0.026 R)
• M67: 39,846,141 km (0.096 R)
• M68: 40,138,904 km (0.078 R)
• M69: 40,530,402 km (0.114 R)
• M70: 46,040,989 km (0.078 R)
• M71: 47,170,901 km (0.092 R)
• M72: 47,687,463 km (0.082 R)
• M73: 48,102,148 km (0.101 R)
• M74: 48,935,109 km (0.112 R)
• M75: 51,038,156 km (0.061 R)
• M76: 51,781,059 km (0.058 R)
• M77: 53,708,029 km (0.098 R)
• M78: 53,815,889 km (0.06 R)
• M79: 57,081,312 km (0.079 R)
• M80: 57,411,474 km (0.094 R)
• M81: 58,627,106 km (0.034 R)
• M82: 60,074,765 km (0.053 R)
• M83: 61,196,300 km (0.114 R)
• M84: 62,211,621 km (0.115 R)
• M85: 62,891,543 km (0.119 R)
• M86: 63,005,088 km (0.089 R)
• M87: 65,635,916 km (0.034 R)
• M88: 70,295,890 km (0.094 R)
• M89: 73,620,703 km (0.098 R)
• M90: 73,979,887 km (0.043 R)
• M91: 74,099,865 km (0.061 R)
• M92: 75,785,085 km (0.045 R)
• M93: 75,905,810 km (0.103 R)
• M94: 81,286,546 km (0.055 R)
• M95: 81,781,715 km (0.113 R)
• M96: 82,775,195 km (0.117 R)

Planet 10 - Ice Giant

Semi-Major Axis: 17.25 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 94

Radius: 4.5

Gravity: 4.64 G

Time & Orbit

Eccentricity (e): 0.156

Orbit Range: 14.56 AU - 19.94 AU

Year: 25298 Days

Day: 23.1 Hours

Environment

Temp: -201 °C

Axial Tilt: 14.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 45,902,241 km

• M1: 63,429 km (0.12 R)
• M2: 116,238 km (0.031 R)
• M3: 176,077 km (0.113 R)
• M4: 215,870 km (0.114 R)
• M5: 356,193 km (0.095 R)
• M6: 508,334 km (0.099 R)
• M7: 729,738 km (0.104 R)
• M8: 763,697 km (0.1 R)
• M9: 1,073,963 km (0.1 R)
• M10: 1,212,192 km (0.096 R)
• M11: 1,440,927 km (0.066 R)
• M12: 1,505,703 km (0.046 R)
• M13: 2,130,872 km (0.086 R)
• M14: 2,380,701 km (0.084 R)
• M15: 2,535,086 km (0.074 R)
• M16: 3,469,923 km (0.096 R)
• M17: 3,498,945 km (0.099 R)
• M18: 3,733,664 km (0.111 R)
• M19: 4,125,909 km (0.115 R)
• M20: 4,280,145 km (0.029 R)
• M21: 4,786,833 km (0.099 R)
• M22: 5,581,646 km (0.118 R)
• M23: 5,752,337 km (0.066 R)
• M24: 6,239,578 km (0.108 R)
• M25: 6,381,097 km (0.119 R)
• M26: 6,921,594 km (0.068 R)
• M27: 7,476,602 km (0.095 R)
• M28: 7,626,948 km (0.092 R)
• M29: 7,892,634 km (0.085 R)
• M30: 7,969,079 km (0.119 R)
• M31: 8,589,461 km (0.079 R)
• M32: 8,707,643 km (0.091 R)
• M33: 8,865,918 km (0.052 R)
• M34: 8,985,147 km (0.084 R)
• M35: 9,508,291 km (0.105 R)
• M36: 10,041,458 km (0.082 R)
• M37: 10,710,609 km (0.025 R)
• M38: 11,394,271 km (0.077 R)
• M39: 12,180,109 km (0.089 R)
• M40: 12,224,240 km (0.096 R)
• M41: 12,312,802 km (0.078 R)
• M42: 12,668,845 km (0.116 R)
• M43: 13,164,014 km (0.089 R)
• M44: 13,895,548 km (0.105 R)
• M45: 14,080,451 km (0.032 R)
• M46: 14,173,201 km (0.087 R)
• M47: 14,546,448 km (0.09 R)
• M48: 16,216,409 km (0.1 R)
• M49: 16,313,648 km (0.08 R)
• M50: 18,909,470 km (0.087 R)
• M51: 19,268,505 km (0.041 R)
• M52: 19,837,426 km (0.112 R)
• M53: 20,674,725 km (0.105 R)
• M54: 20,991,573 km (0.115 R)
• M55: 23,474,299 km (0.058 R)
• M56: 23,694,508 km (0.063 R)
• M57: 23,860,112 km (0.079 R)
• M58: 24,192,519 km (0.086 R)
• M59: 24,248,020 km (0.1 R)
• M60: 24,359,320 km (0.057 R)
• M61: 25,367,909 km (0.078 R)
• M62: 27,194,649 km (0.114 R)
• M63: 27,541,716 km (0.079 R)
• M64: 29,240,400 km (0.075 R)
• M65: 29,655,534 km (0.115 R)
• M66: 29,834,004 km (0.086 R)
• M67: 30,251,831 km (0.071 R)
• M68: 31,033,031 km (0.086 R)
• M69: 31,820,813 km (0.107 R)
• M70: 32,064,508 km (0.116 R)
• M71: 32,799,333 km (0.115 R)
• M72: 32,860,818 km (0.094 R)
• M73: 33,045,571 km (0.107 R)
• M74: 33,539,843 km (0.058 R)
• M75: 33,849,959 km (0.113 R)
• M76: 34,098,740 km (0.094 R)
• M77: 34,223,355 km (0.098 R)
• M78: 35,414,753 km (0.082 R)
• M79: 36,683,642 km (0.056 R)
• M80: 37,003,183 km (0.116 R)
• M81: 37,644,958 km (0.107 R)
• M82: 38,744,353 km (0.047 R)
• M83: 38,939,578 km (0.076 R)
• M84: 39,069,728 km (0.073 R)
• M85: 39,330,776 km (0.052 R)
• M86: 39,920,042 km (0.095 R)
• M87: 40,842,463 km (0.105 R)
• M88: 43,111,862 km (0.097 R)
• M89: 43,246,500 km (0.115 R)
• M90: 43,854,765 km (0.05 R)
• M91: 44,397,656 km (0.073 R)
• M92: 44,601,857 km (0.073 R)

Kuiper Belt

Range: 31.1 - 59.1 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 177 - 10,505 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit