🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.9 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.94

Radius: 0.98

Gravity: 0.98 G

Time & Orbit

Eccentricity (e): 0.147

Orbit Range: 0.77 AU - 1.03 AU

Year: 320 Days

Day: 38.6 Hours

Environment

Temp: 31 °C

Axial Tilt: 12.5 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 2 - Terrestrial

Semi-Major Axis: 1.88 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.03

Radius: 1.56

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 1.59 AU - 2.17 AU

Year: 966 Days

Day: 35.6 Hours

Environment

Temp: -76 °C

Axial Tilt: 19.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 53,233,775 km

• M1: 695,481 km (0.03 R)

Planet 3 - Terrestrial

Semi-Major Axis: 3.11 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.46

Radius: 0.73

Gravity: 0.86 G

Time & Orbit

Eccentricity (e): 0.074

Orbit Range: 2.88 AU - 3.34 AU

Year: 2055 Days

Day: 15.5 Hours

Environment

Temp: -118 °C

Axial Tilt: 39.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 3.51 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.32

Radius: 0.63

Gravity: 0.81 G

Time & Orbit

Eccentricity (e): 0.196

Orbit Range: 2.82 AU - 4.2 AU

Year: 2464 Days

Day: 30.2 Hours

Environment

Temp: -130 °C

Axial Tilt: 4.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 5.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 207

Radius: 9.9

Gravity: 2.11 G

Time & Orbit

Eccentricity (e): 0.176

Orbit Range: 4.66 AU - 6.64 AU

Year: 5033 Days

Day: 10 Hours

Environment

Temp: -158 °C

Axial Tilt: 16.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 53,233,775 km

• M1: 123,717 km (0.084 R)
• M2: 233,522 km (0.108 R)
• M3: 427,850 km (0.095 R)
• M4: 489,783 km (0.117 R)
• M5: 871,258 km (0.078 R)
• M6: 995,723 km (0.096 R)
• M7: 1,251,536 km (0.081 R)
• M8: 1,345,633 km (0.081 R)
• M9: 1,491,192 km (0.108 R)
• M10: 1,616,704 km (0.036 R)
• M11: 1,706,613 km (0.119 R)
• M12: 1,798,466 km (0.087 R)
• M13: 1,932,356 km (0.074 R)
• M14: 2,000,722 km (0.08 R)
• M15: 2,224,670 km (0.047 R)
• M16: 2,296,477 km (0.103 R)
• M17: 2,456,995 km (0.106 R)
• M18: 2,561,116 km (0.119 R)
• M19: 2,636,513 km (0.104 R)
• M20: 3,184,639 km (0.114 R)
• M21: 3,298,483 km (0.119 R)
• M22: 3,547,115 km (0.099 R)
• M23: 3,802,030 km (0.105 R)
• M24: 3,888,348 km (0.049 R)
• M25: 3,992,767 km (0.087 R)
• M26: 4,062,929 km (0.104 R)
• M27: 4,204,448 km (0.102 R)
• M28: 4,861,482 km (0.11 R)
• M29: 4,993,128 km (0.091 R)
• M30: 5,106,823 km (0.079 R)
• M31: 5,202,116 km (0.105 R)
• M32: 5,356,053 km (0.08 R)
• M33: 5,550,679 km (0.041 R)
• M34: 5,629,069 km (0.118 R)
• M35: 5,806,941 km (0.118 R)
• M36: 5,906,722 km (0.09 R)
• M37: 6,599,360 km (0.119 R)
• M38: 6,892,124 km (0.098 R)
• M39: 6,976,646 km (0.117 R)
• M40: 7,620,964 km (0.111 R)
• M41: 8,016,651 km (0.103 R)
• M42: 8,127,802 km (0.085 R)
• M43: 8,759,554 km (0.095 R)
• M44: 9,243,802 km (0.039 R)
• M45: 9,713,091 km (0.064 R)
• M46: 9,807,786 km (0.101 R)
• M47: 10,504,314 km (0.106 R)
• M48: 10,870,828 km (0.087 R)
• M49: 11,092,682 km (0.113 R)
• M50: 11,167,032 km (0.072 R)
• M51: 11,365,997 km (0.077 R)
• M52: 11,465,929 km (0.076 R)
• M53: 11,641,557 km (0.118 R)
• M54: 12,097,232 km (0.118 R)
• M55: 12,558,741 km (0.074 R)
• M56: 12,921,666 km (0.049 R)
• M57: 13,130,654 km (0.115 R)
• M58: 14,245,906 km (0.064 R)
• M59: 14,624,389 km (0.102 R)
• M60: 15,061,065 km (0.101 R)
• M61: 15,585,256 km (0.118 R)
• M62: 15,807,708 km (0.053 R)
• M63: 15,975,257 km (0.091 R)
• M64: 16,340,276 km (0.101 R)
• M65: 16,509,771 km (0.105 R)
• M66: 16,793,408 km (0.104 R)
• M67: 17,394,343 km (0.118 R)
• M68: 17,538,406 km (0.082 R)
• M69: 17,654,045 km (0.098 R)
• M70: 17,827,877 km (0.079 R)
• M71: 18,002,309 km (0.119 R)
• M72: 18,118,995 km (0.1 R)
• M73: 18,235,831 km (0.116 R)
• M74: 18,823,900 km (0.086 R)
• M75: 19,060,863 km (0.108 R)
• M76: 19,507,712 km (0.111 R)
• M77: 19,807,656 km (0.047 R)
• M78: 20,169,683 km (0.119 R)

Asteroid Belt

Center: 6.1 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 6 - Gas Giant

Semi-Major Axis: 6.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 984

Radius: 9.5

Gravity: 10.9 G

Time & Orbit

Eccentricity (e): 0.203

Orbit Range: 5.21 AU - 7.87 AU

Year: 6268 Days

Day: 12.7 Hours

Environment

Temp: -164 °C

Axial Tilt: 47.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 53,233,775 km

• M1: 146,456 km (0.106 R)
• M2: 205,697 km (0.073 R)
• M3: 482,603 km (0.114 R)
• M4: 586,424 km (0.077 R)
• M5: 818,450 km (0.108 R)
• M6: 896,989 km (0.1 R)
• M7: 961,914 km (0.079 R)
• M8: 1,045,390 km (0.05 R)
• M9: 1,184,366 km (0.094 R)
• M10: 1,442,572 km (0.105 R)
• M11: 1,558,959 km (0.085 R)
• M12: 1,618,200 km (0.048 R)
• M13: 1,990,549 km (0.088 R)
• M14: 2,098,858 km (0.071 R)
• M15: 2,765,017 km (0.081 R)
• M16: 2,886,192 km (0.093 R)
• M17: 3,783,629 km (0.1 R)
• M18: 4,761,401 km (0.119 R)
• M19: 5,566,537 km (0.111 R)
• M20: 5,627,872 km (0.104 R)
• M21: 5,782,257 km (0.064 R)
• M22: 5,906,722 km (0.117 R)
• M23: 7,033,493 km (0.108 R)
• M24: 7,199,846 km (0.078 R)
• M25: 7,844,015 km (0.092 R)
• M26: 7,912,830 km (0.094 R)
• M27: 8,435,824 km (0.096 R)
• M28: 8,612,798 km (0.053 R)
• M29: 9,150,603 km (0.068 R)
• M30: 9,515,322 km (0.114 R)
• M31: 9,625,725 km (0.066 R)
• M32: 10,146,176 km (0.103 R)
• M33: 11,331,291 km (0.076 R)
• M34: 11,604,905 km (0.09 R)
• M35: 11,999,694 km (0.108 R)
• M36: 12,198,659 km (0.108 R)
• M37: 12,318,637 km (0.097 R)
• M38: 12,398,821 km (0.098 R)
• M39: 13,333,209 km (0.061 R)
• M40: 13,829,874 km (0.044 R)
• M41: 13,954,938 km (0.111 R)
• M42: 14,206,263 km (0.11 R)
• M43: 14,926,427 km (0.098 R)
• M44: 15,485,175 km (0.087 R)
• M45: 16,138,469 km (0.078 R)
• M46: 16,534,753 km (0.097 R)
• M47: 16,934,329 km (0.067 R)
• M48: 17,157,529 km (0.026 R)
• M49: 17,381,926 km (0.032 R)
• M50: 17,471,835 km (0.109 R)
• M51: 17,878,741 km (0.105 R)
• M52: 19,677,805 km (0.067 R)
• M53: 19,865,700 km (0.078 R)
• M54: 19,959,797 km (0.064 R)
• M55: 20,622,665 km (0.099 R)
• M56: 21,196,672 km (0.062 R)
• M57: 21,341,034 km (0.046 R)
• M58: 21,485,545 km (0.046 R)
• M59: 21,970,093 km (0.095 R)
• M60: 22,116,250 km (0.088 R)
• M61: 23,445,277 km (0.07 R)
• M62: 23,744,024 km (0.109 R)
• M63: 25,410,246 km (0.067 R)
• M64: 26,231,538 km (0.084 R)
• M65: 26,853,267 km (0.041 R)
• M66: 27,165,926 km (0.068 R)
• M67: 27,427,423 km (0.085 R)
• M68: 28,217,001 km (0.109 R)
• M69: 28,853,989 km (0.083 R)
• M70: 29,227,684 km (0.083 R)
• M71: 29,818,296 km (0.031 R)
• M72: 31,998,985 km (0.045 R)
• M73: 32,109,388 km (0.096 R)
• M74: 32,275,142 km (0.112 R)
• M75: 33,499,750 km (0.104 R)
• M76: 33,780,246 km (0.074 R)
• M77: 33,948,843 km (0.066 R)
• M78: 34,117,739 km (0.082 R)
• M79: 34,286,934 km (0.11 R)
• M80: 35,764,961 km (0.119 R)
• M81: 36,800,478 km (0.074 R)
• M82: 37,147,694 km (0.111 R)
• M83: 37,263,782 km (0.117 R)
• M84: 37,845,718 km (0.111 R)
• M85: 38,959,624 km (0.117 R)

Planet 7 - Gas Giant

Semi-Major Axis: 7.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 403.1

Radius: 12.1

Gravity: 2.75 G

Time & Orbit

Eccentricity (e): 0.001

Orbit Range: 7.03 AU - 7.05 AU

Year: 7000 Days

Day: 11.5 Hours

Environment

Temp: -168 °C

Axial Tilt: 45.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (67)

Outer Limit: 53,233,775 km

• M1: 348,114 km (0.072 R)
• M2: 431,440 km (0.112 R)
• M3: 534,962 km (0.109 R)
• M4: 684,859 km (0.095 R)
• M5: 876,943 km (0.108 R)
• M6: 1,073,365 km (0.095 R)
• M7: 1,300,305 km (0.081 R)
• M8: 1,679,087 km (0.118 R)
• M9: 2,110,976 km (0.115 R)
• M10: 2,262,817 km (0.111 R)
• M11: 2,557,226 km (0.113 R)
• M12: 3,763,733 km (0.096 R)
• M13: 3,879,222 km (0.029 R)
• M14: 3,995,759 km (0.119 R)
• M15: 4,208,786 km (0.035 R)
• M16: 4,304,679 km (0.066 R)
• M17: 4,498,558 km (0.059 R)
• M18: 4,596,694 km (0.079 R)
• M19: 4,745,095 km (0.118 R)
• M20: 4,996,120 km (0.082 R)
• M21: 5,303,245 km (0.106 R)
• M22: 5,855,410 km (0.095 R)
• M23: 6,592,479 km (0.089 R)
• M24: 6,788,452 km (0.117 R)
• M25: 6,901,249 km (0.105 R)
• M26: 6,986,370 km (0.035 R)
• M27: 7,387,741 km (0.047 R)
• M28: 7,826,362 km (0.097 R)
• M29: 7,915,074 km (0.113 R)
• M30: 8,063,774 km (0.091 R)
• M31: 8,183,303 km (0.049 R)
• M32: 8,394,086 km (0.077 R)
• M33: 8,576,147 km (0.116 R)
• M34: 9,664,172 km (0.076 R)
• M35: 10,631,173 km (0.067 R)
• M36: 10,828,343 km (0.092 R)
• M37: 10,960,438 km (0.092 R)
• M38: 11,696,609 km (0.078 R)
• M39: 11,832,144 km (0.114 R)
• M40: 12,207,635 km (0.054 R)
• M41: 12,310,708 km (0.08 R)
• M42: 12,830,710 km (0.103 R)
• M43: 13,005,590 km (0.055 R)
• M44: 13,713,038 km (0.066 R)
• M45: 13,820,300 km (0.078 R)
• M46: 14,615,114 km (0.095 R)
• M47: 14,724,619 km (0.109 R)
• M48: 14,834,424 km (0.112 R)
• M49: 15,165,484 km (0.074 R)
• M50: 15,536,188 km (0.075 R)
• M51: 15,909,883 km (0.073 R)
• M52: 17,202,708 km (0.098 R)
• M53: 19,525,364 km (0.111 R)
• M54: 20,457,210 km (0.082 R)
• M55: 20,661,710 km (0.082 R)
• M56: 21,611,058 km (0.056 R)
• M57: 23,723,829 km (0.08 R)
• M58: 23,852,632 km (0.093 R)
• M59: 25,022,787 km (0.09 R)
• M60: 25,285,481 km (0.055 R)
• M61: 27,104,142 km (0.063 R)
• M62: 28,689,880 km (0.077 R)
• M63: 28,781,434 km (0.082 R)
• M64: 29,563,232 km (0.092 R)
• M65: 29,840,886 km (0.11 R)
• M66: 31,430,363 km (0.074 R)
• M67: 31,524,759 km (0.086 R)

Planet 8 - Gas Giant

Semi-Major Axis: 7.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 298.5

Radius: 12.3

Gravity: 1.97 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 5.44 AU - 8.74 AU

Year: 7075 Days

Day: 5.3 Hours

Environment

Temp: -157 °C

Axial Tilt: 34.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 53,233,775 km

• M1: 157,676 km (0.051 R)
• M2: 259,702 km (0.063 R)
• M3: 373,995 km (0.033 R)
• M4: 473,776 km (0.097 R)
• M5: 778,208 km (0.096 R)
• M6: 914,941 km (0.081 R)
• M7: 1,157,439 km (0.084 R)
• M8: 1,467,256 km (0.082 R)
• M9: 1,608,327 km (0.106 R)
• M10: 1,688,661 km (0.117 R)
• M11: 2,111,574 km (0.095 R)
• M12: 2,875,421 km (0.064 R)
• M13: 3,298,035 km (0.093 R)
• M14: 3,401,556 km (0.084 R)
• M15: 4,314,403 km (0.089 R)
• M16: 4,405,208 km (0.075 R)
• M17: 4,588,615 km (0.045 R)
• M18: 4,845,176 km (0.106 R)
• M19: 5,082,588 km (0.074 R)
• M20: 5,226,800 km (0.057 R)
• M21: 5,372,508 km (0.103 R)
• M22: 5,568,781 km (0.084 R)
• M23: 6,019,370 km (0.068 R)
• M24: 7,413,472 km (0.099 R)
• M25: 7,577,431 km (0.113 R)
• M26: 7,770,263 km (0.112 R)
• M27: 8,330,208 km (0.049 R)
• M28: 8,643,765 km (0.117 R)
• M29: 8,990,383 km (0.061 R)
• M30: 9,223,906 km (0.066 R)
• M31: 9,400,431 km (0.078 R)
• M32: 9,489,143 km (0.092 R)
• M33: 10,391,218 km (0.088 R)
• M34: 10,513,589 km (0.049 R)
• M35: 10,790,644 km (0.1 R)
• M36: 11,038,976 km (0.077 R)
• M37: 11,320,669 km (0.065 R)
• M38: 11,731,764 km (0.041 R)
• M39: 12,179,959 km (0.109 R)
• M40: 12,309,062 km (0.052 R)
• M41: 13,927,113 km (0.115 R)
• M42: 14,028,391 km (0.119 R)
• M43: 14,265,503 km (0.114 R)
• M44: 14,538,220 km (0.07 R)
• M45: 14,743,917 km (0.117 R)
• M46: 15,088,890 km (0.07 R)
• M47: 15,471,412 km (0.069 R)
• M48: 16,068,906 km (0.042 R)
• M49: 16,459,506 km (0.108 R)
• M50: 16,673,879 km (0.078 R)
• M51: 16,817,344 km (0.049 R)
• M52: 17,358,888 km (0.095 R)
• M53: 17,540,799 km (0.112 R)
• M54: 17,686,657 km (0.092 R)
• M55: 18,311,228 km (0.084 R)
• M56: 18,868,480 km (0.095 R)
• M57: 19,092,877 km (0.107 R)
• M58: 19,847,449 km (0.082 R)
• M59: 20,228,325 km (0.112 R)
• M60: 20,688,638 km (0.09 R)
• M61: 20,958,811 km (0.082 R)
• M62: 22,842,398 km (0.074 R)
• M63: 23,401,894 km (0.065 R)
• M64: 23,522,470 km (0.099 R)
• M65: 24,168,583 km (0.112 R)
• M66: 24,331,046 km (0.057 R)
• M67: 25,107,609 km (0.095 R)
• M68: 25,313,456 km (0.09 R)
• M69: 26,141,929 km (0.059 R)
• M70: 26,517,569 km (0.049 R)
• M71: 27,105,638 km (0.078 R)
• M72: 27,613,224 km (0.108 R)
• M73: 27,783,017 km (0.065 R)
• M74: 28,209,222 km (0.116 R)
• M75: 28,294,642 km (0.096 R)

Planet 9 - Ice Giant

Semi-Major Axis: 12.7 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 326.2

Radius: 4.1

Gravity: 19.41 G

Time & Orbit

Eccentricity (e): 0.162

Orbit Range: 10.64 AU - 14.76 AU

Year: 16960 Days

Day: 24.2 Hours

Environment

Temp: -178 °C

Axial Tilt: 9.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 53,233,775 km

• M1: 82,129 km (0.034 R)
• M2: 158,574 km (0.061 R)
• M3: 201,359 km (0.101 R)
• M4: 355,445 km (0.105 R)
• M5: 444,904 km (0.029 R)
• M6: 492,476 km (0.106 R)
• M7: 558,598 km (0.029 R)
• M8: 681,568 km (0.073 R)
• M9: 891,903 km (0.066 R)
• M10: 1,231,938 km (0.098 R)
• M11: 1,345,782 km (0.088 R)
• M12: 1,559,259 km (0.074 R)
• M13: 1,912,459 km (0.085 R)
• M14: 2,071,183 km (0.103 R)
• M15: 2,261,770 km (0.088 R)
• M16: 2,659,701 km (0.119 R)
• M17: 2,689,022 km (0.091 R)
• M18: 2,807,054 km (0.12 R)
• M19: 2,836,824 km (0.078 R)
• M20: 3,017,838 km (0.055 R)
• M21: 3,518,692 km (0.099 R)
• M22: 3,778,693 km (0.079 R)
• M23: 3,911,087 km (0.044 R)
• M24: 3,944,447 km (0.074 R)
• M25: 4,078,636 km (0.104 R)
• M26: 4,386,210 km (0.095 R)
• M27: 5,242,209 km (0.11 R)
• M28: 5,689,207 km (0.065 R)
• M29: 5,764,904 km (0.058 R)
• M30: 6,187,069 km (0.065 R)
• M31: 6,421,638 km (0.044 R)
• M32: 6,460,982 km (0.119 R)
• M33: 6,539,970 km (0.036 R)
• M34: 6,659,050 km (0.11 R)
• M35: 6,698,843 km (0.117 R)
• M36: 6,778,728 km (0.067 R)
• M37: 7,101,710 km (0.086 R)
• M38: 8,702,557 km (0.076 R)
• M39: 8,921,269 km (0.107 R)
• M40: 10,455,395 km (0.061 R)
• M41: 10,641,196 km (0.095 R)
• M42: 11,063,211 km (0.036 R)
• M43: 11,157,757 km (0.085 R)
• M44: 11,586,355 km (0.088 R)
• M45: 11,730,418 km (0.03 R)
• M46: 11,826,908 km (0.105 R)
• M47: 12,263,884 km (0.074 R)
• M48: 13,354,153 km (0.083 R)
• M49: 14,166,470 km (0.112 R)
• M50: 14,734,193 km (0.089 R)
• M51: 14,942,434 km (0.085 R)
• M52: 15,099,212 km (0.108 R)
• M53: 15,467,373 km (0.114 R)
• M54: 16,105,258 km (0.1 R)
• M55: 16,158,814 km (0.065 R)
• M56: 19,250,254 km (0.115 R)
• M57: 19,878,415 km (0.029 R)
• M58: 20,804,127 km (0.116 R)
• M59: 21,331,011 km (0.086 R)
• M60: 22,397,793 km (0.082 R)
• M61: 22,577,311 km (0.113 R)
• M62: 23,118,556 km (0.052 R)
• M63: 23,300,018 km (0.08 R)
• M64: 24,768,171 km (0.111 R)
• M65: 25,825,978 km (0.116 R)
• M66: 26,328,926 km (0.069 R)
• M67: 26,518,317 km (0.049 R)
• M68: 26,771,586 km (0.088 R)
• M69: 27,280,518 km (0.12 R)
• M70: 27,536,181 km (0.077 R)
• M71: 27,921,246 km (0.049 R)
• M72: 28,502,134 km (0.112 R)
• M73: 28,696,612 km (0.08 R)
• M74: 31,331,778 km (0.088 R)
• M75: 32,407,237 km (0.114 R)
• M76: 32,881,462 km (0.07 R)
• M77: 35,635,709 km (0.11 R)
• M78: 37,181,653 km (0.085 R)
• M79: 37,536,051 km (0.046 R)
• M80: 37,820,436 km (0.106 R)
• M81: 39,180,730 km (0.082 R)
• M82: 41,728,232 km (0.109 R)
• M83: 44,328,841 km (0.082 R)
• M84: 44,554,135 km (0.113 R)
• M85: 45,610,745 km (0.059 R)
• M86: 45,838,134 km (0.094 R)
• M87: 45,914,130 km (0.081 R)
• M88: 46,446,698 km (0.111 R)
• M89: 47,979,478 km (0.112 R)
• M90: 48,210,756 km (0.104 R)
• M91: 48,907,134 km (0.109 R)
• M92: 49,684,594 km (0.082 R)
• M93: 50,701,561 km (0.112 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 525 - 16,993 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit