🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.07 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.15

Radius: 0.47

Gravity: 0.68 G

Time & Orbit

Eccentricity (e): 0.15

Orbit Range: 0.91 AU - 1.23 AU

Year: 393 Days

Day: 25.7 Hours

Environment

Temp: 22 °C

Axial Tilt: 4.1 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 45,511,541 km

• M1: 57,446 km (0.112 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.15 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.25

Radius: 1.6

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.022

Orbit Range: 1.12 AU - 1.18 AU

Year: 438 Days

Day: 18.4 Hours

Environment

Temp: 38 °C

Axial Tilt: 5 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (2)

Outer Limit: 45,511,541 km

• M1: 116,387 km (0.091 R)
• M2: 432,188 km (0.115 R)

Planet 3 - Terrestrial

Semi-Major Axis: 2.05 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.77

Radius: 1.7

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 1.98 AU - 2.12 AU

Year: 1041 Days

Day: 21.6 Hours

Environment

Temp: -59 °C

Axial Tilt: 43.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 3.16 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.82

Radius: 1.71

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.1

Orbit Range: 2.84 AU - 3.48 AU

Year: 1993 Days

Day: 16.6 Hours

Environment

Temp: -90 °C

Axial Tilt: 0.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 45,511,541 km

• M1: 2,048,144 km (0.093 R)
• M2: 2,588,492 km (0.067 R)

Planet 5 - Gas Giant

Semi-Major Axis: 6.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 692.6

Radius: 10.2

Gravity: 6.66 G

Time & Orbit

Eccentricity (e): 0.026

Orbit Range: 6.7 AU - 7.06 AU

Year: 6402 Days

Day: 12.8 Hours

Environment

Temp: -146 °C

Axial Tilt: 37.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 45,511,541 km

• M1: 302,636 km (0.066 R)
• M2: 586,124 km (0.096 R)
• M3: 703,409 km (0.11 R)
• M4: 843,732 km (0.107 R)
• M5: 1,136,794 km (0.111 R)
• M6: 1,338,452 km (0.088 R)
• M7: 1,607,130 km (0.093 R)
• M8: 1,776,774 km (0.065 R)
• M9: 1,873,564 km (0.065 R)
• M10: 2,257,881 km (0.058 R)
• M11: 2,823,660 km (0.089 R)
• M12: 3,076,031 km (0.089 R)
• M13: 3,335,733 km (0.063 R)
• M14: 3,456,309 km (0.108 R)
• M15: 3,553,697 km (0.07 R)
• M16: 3,701,650 km (0.107 R)
• M17: 3,776,299 km (0.11 R)
• M18: 3,851,547 km (0.065 R)
• M19: 4,183,504 km (0.091 R)
• M20: 4,287,475 km (0.092 R)
• M21: 4,984,601 km (0.086 R)
• M22: 5,890,566 km (0.099 R)
• M23: 6,213,697 km (0.069 R)
• M24: 6,694,056 km (0.084 R)
• M25: 8,173,728 km (0.057 R)
• M26: 8,238,953 km (0.119 R)
• M27: 8,900,026 km (0.111 R)
• M28: 8,967,046 km (0.085 R)
• M29: 9,101,684 km (0.052 R)
• M30: 9,441,122 km (0.105 R)
• M31: 9,612,561 km (0.099 R)
• M32: 10,555,476 km (0.079 R)
• M33: 10,733,198 km (0.109 R)
• M34: 11,019,978 km (0.075 R)
• M35: 11,858,025 km (0.115 R)
• M36: 12,378,326 km (0.082 R)
• M37: 13,058,249 km (0.113 R)
• M38: 13,287,432 km (0.119 R)
• M39: 13,441,069 km (0.058 R)
• M40: 13,866,675 km (0.031 R)
• M41: 13,944,466 km (0.113 R)
• M42: 14,257,275 km (0.084 R)
• M43: 14,453,997 km (0.112 R)
• M44: 14,572,478 km (0.109 R)
• M45: 14,691,259 km (0.114 R)
• M46: 15,370,433 km (0.114 R)
• M47: 15,734,255 km (0.088 R)
• M48: 17,385,068 km (0.104 R)
• M49: 17,721,663 km (0.049 R)
• M50: 17,806,186 km (0.046 R)
• M51: 18,960,483 km (0.103 R)
• M52: 19,220,185 km (0.092 R)
• M53: 20,625,507 km (0.112 R)
• M54: 22,382,684 km (0.108 R)
• M55: 22,519,715 km (0.083 R)
• M56: 22,794,826 km (0.031 R)
• M57: 25,320,786 km (0.09 R)
• M58: 25,511,523 km (0.06 R)
• M59: 25,606,967 km (0.025 R)
• M60: 25,750,431 km (0.066 R)
• M61: 25,894,195 km (0.111 R)
• M62: 28,973,517 km (0.108 R)
• M63: 29,522,990 km (0.094 R)
• M64: 30,530,831 km (0.111 R)
• M65: 32,995,306 km (0.104 R)
• M66: 33,099,277 km (0.044 R)
• M67: 33,255,607 km (0.115 R)
• M68: 33,778,451 km (0.062 R)
• M69: 34,251,330 km (0.11 R)

Planet 6 - Gas Giant

Semi-Major Axis: 7.92 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 962.7

Radius: 14.4

Gravity: 4.64 G

Time & Orbit

Eccentricity (e): 0.179

Orbit Range: 6.5 AU - 9.34 AU

Year: 7907 Days

Day: 6.1 Hours

Environment

Temp: -160 °C

Axial Tilt: 3.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 45,511,541 km

• M1: 180,565 km (0.053 R)
• M2: 298,897 km (0.093 R)
• M3: 416,780 km (0.1 R)
• M4: 630,256 km (0.098 R)
• M5: 902,225 km (0.06 R)
• M6: 1,007,990 km (0.037 R)
• M7: 1,099,694 km (0.065 R)
• M8: 2,422,289 km (0.079 R)
• M9: 2,889,184 km (0.096 R)
• M10: 3,847,657 km (0.03 R)
• M11: 4,086,864 km (0.108 R)
• M12: 4,208,338 km (0.111 R)
• M13: 4,331,008 km (0.055 R)
• M14: 4,454,875 km (0.087 R)
• M15: 4,643,069 km (0.048 R)
• M16: 5,223,509 km (0.119 R)
• M17: 5,455,535 km (0.092 R)
• M18: 5,691,002 km (0.05 R)
• M19: 6,810,144 km (0.074 R)
• M20: 6,954,805 km (0.087 R)
• M21: 7,100,513 km (0.092 R)
• M22: 7,247,269 km (0.118 R)
• M23: 7,618,571 km (0.092 R)
• M24: 8,341,278 km (0.057 R)
• M25: 8,769,876 km (0.11 R)
• M26: 8,887,909 km (0.107 R)
• M27: 9,205,505 km (0.085 R)
• M28: 9,486,599 km (0.051 R)
• M29: 9,648,464 km (0.101 R)
• M30: 10,139,594 km (0.078 R)
• M31: 11,446,032 km (0.108 R)
• M32: 11,922,352 km (0.11 R)
• M33: 12,405,254 km (0.047 R)
• M34: 13,209,342 km (0.086 R)
• M35: 13,892,257 km (0.104 R)
• M36: 14,307,540 km (0.112 R)
• M37: 15,577,925 km (0.051 R)
• M38: 15,817,132 km (0.037 R)
• M39: 16,396,226 km (0.106 R)
• M40: 16,493,464 km (0.076 R)
• M41: 16,639,622 km (0.056 R)
• M42: 17,278,105 km (0.039 R)
• M43: 17,376,989 km (0.118 R)
• M44: 17,874,552 km (0.083 R)
• M45: 18,275,923 km (0.095 R)
• M46: 18,985,615 km (0.1 R)
• M47: 19,087,641 km (0.091 R)
• M48: 19,652,523 km (0.049 R)
• M49: 20,066,909 km (0.03 R)
• M50: 20,223,089 km (0.095 R)
• M51: 21,115,291 km (0.061 R)
• M52: 24,477,353 km (0.096 R)
• M53: 27,250,000 km (0.069 R)
• M54: 28,293,296 km (0.035 R)
• M55: 28,585,460 km (0.098 R)
• M56: 29,882,923 km (0.115 R)
• M57: 30,240,013 km (0.116 R)
• M58: 30,838,404 km (0.095 R)
• M59: 31,380,397 km (0.088 R)
• M60: 31,501,272 km (0.1 R)
• M61: 31,622,148 km (0.052 R)
• M62: 32,107,892 km (0.114 R)
• M63: 32,902,256 km (0.034 R)
• M64: 33,950,788 km (0.114 R)
• M65: 34,947,708 km (0.094 R)
• M66: 36,270,752 km (0.05 R)
• M67: 36,715,357 km (0.117 R)
• M68: 38,060,241 km (0.043 R)
• M69: 38,641,429 km (0.052 R)
• M70: 40,009,203 km (0.091 R)
• M71: 40,534,441 km (0.111 R)
• M72: 42,457,521 km (0.088 R)
• M73: 42,792,022 km (0.083 R)
• M74: 42,926,211 km (0.095 R)
• M75: 43,127,570 km (0.05 R)
• M76: 44,477,990 km (0.094 R)
• M77: 45,431,677 km (0.107 R)
• M78: 45,568,409 km (0.1 R)

Asteroid Belt

Center: 8.52 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 7 - Gas Giant

Semi-Major Axis: 9.12 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 224.3

Radius: 9.5

Gravity: 2.49 G

Time & Orbit

Eccentricity (e): 0.131

Orbit Range: 7.93 AU - 10.31 AU

Year: 9771 Days

Day: 9.2 Hours

Environment

Temp: -164 °C

Axial Tilt: 29.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 45,511,541 km

• M1: 189,989 km (0.106 R)
• M2: 261,946 km (0.034 R)
• M3: 358,287 km (0.101 R)
• M4: 469,737 km (0.098 R)
• M5: 547,678 km (0.063 R)
• M6: 618,587 km (0.102 R)
• M7: 921,373 km (0.096 R)
• M8: 1,431,951 km (0.12 R)
• M9: 1,533,528 km (0.088 R)
• M10: 1,743,862 km (0.112 R)
• M11: 1,815,969 km (0.11 R)
• M12: 2,057,868 km (0.062 R)
• M13: 2,390,125 km (0.073 R)
• M14: 2,572,784 km (0.053 R)
• M15: 2,973,856 km (0.06 R)
• M16: 3,148,736 km (0.097 R)
• M17: 3,440,003 km (0.101 R)
• M18: 3,763,583 km (0.105 R)
• M19: 3,881,616 km (0.061 R)
• M20: 4,242,895 km (0.057 R)
• M21: 4,415,232 km (0.117 R)
• M22: 4,665,509 km (0.074 R)
• M23: 4,972,035 km (0.085 R)
• M24: 5,337,951 km (0.101 R)
• M25: 5,444,166 km (0.053 R)
• M26: 5,658,539 km (0.061 R)
• M27: 5,875,905 km (0.108 R)
• M28: 6,040,612 km (0.115 R)
• M29: 6,179,140 km (0.073 R)
• M30: 6,858,464 km (0.059 R)
• M31: 7,472,264 km (0.105 R)
• M32: 7,891,288 km (0.118 R)
• M33: 8,596,342 km (0.094 R)
• M34: 8,658,575 km (0.075 R)
• M35: 8,752,373 km (0.068 R)
• M36: 9,098,692 km (0.111 R)
• M37: 9,289,579 km (0.104 R)
• M38: 9,449,649 km (0.053 R)
• M39: 9,707,555 km (0.114 R)
• M40: 9,902,631 km (0.065 R)
• M41: 10,528,848 km (0.077 R)
• M42: 10,998,435 km (0.091 R)
• M43: 11,958,106 km (0.101 R)
• M44: 12,027,669 km (0.104 R)
• M45: 12,837,592 km (0.085 R)
• M46: 13,231,034 km (0.042 R)
• M47: 13,592,313 km (0.097 R)
• M48: 14,435,447 km (0.114 R)
• M49: 14,620,948 km (0.028 R)
• M50: 14,769,947 km (0.085 R)
• M51: 16,133,532 km (0.084 R)
• M52: 16,869,404 km (0.073 R)
• M53: 17,025,734 km (0.107 R)
• M54: 17,418,578 km (0.105 R)
• M55: 17,695,483 km (0.084 R)
• M56: 18,133,356 km (0.059 R)
• M57: 18,373,760 km (0.08 R)
• M58: 18,857,709 km (0.085 R)
• M59: 19,101,255 km (0.05 R)
• M60: 19,223,326 km (0.104 R)
• M61: 19,427,527 km (0.113 R)
• M62: 19,632,477 km (0.097 R)
• M63: 20,709,581 km (0.103 R)
• M64: 20,876,981 km (0.067 R)
• M65: 21,763,199 km (0.096 R)
• M66: 22,834,320 km (0.046 R)
• M67: 23,398,005 km (0.097 R)
• M68: 23,485,220 km (0.091 R)
• M69: 24,760,692 km (0.101 R)
• M70: 25,923,516 km (0.096 R)
• M71: 26,194,288 km (0.104 R)
• M72: 27,700,589 km (0.103 R)
• M73: 27,931,269 km (0.077 R)
• M74: 28,301,823 km (0.05 R)
• M75: 29,235,014 km (0.07 R)
• M76: 29,705,350 km (0.048 R)
• M77: 29,894,143 km (0.102 R)
• M78: 30,701,223 km (0.076 R)
• M79: 31,131,466 km (0.06 R)
• M80: 31,611,825 km (0.11 R)
• M81: 32,094,578 km (0.11 R)

Planet 8 - Gas Giant

Semi-Major Axis: 11.93 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 595.9

Radius: 8.2

Gravity: 8.86 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 11 AU - 12.86 AU

Year: 14618 Days

Day: 7.7 Hours

Environment

Temp: -188 °C

Axial Tilt: 19.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 45,511,541 km

• M1: 819,796 km (0.086 R)
• M2: 1,054,515 km (0.09 R)
• M3: 1,262,456 km (0.09 R)
• M4: 1,408,464 km (0.107 R)
• M5: 1,611,767 km (0.115 R)
• M6: 1,770,640 km (0.075 R)
• M7: 1,824,795 km (0.057 R)
• M8: 2,671,070 km (0.097 R)
• M9: 3,020,381 km (0.076 R)
• M10: 3,283,524 km (0.098 R)
• M11: 3,451,821 km (0.113 R)
• M12: 3,588,554 km (0.099 R)
• M13: 3,902,859 km (0.114 R)
• M14: 4,262,343 km (0.078 R)
• M15: 4,632,597 km (0.077 R)
• M16: 5,246,397 km (0.092 R)
• M17: 5,523,004 km (0.082 R)
• M18: 6,131,867 km (0.063 R)
• M19: 6,976,497 km (0.12 R)
• M20: 7,062,964 km (0.1 R)
• M21: 7,324,461 km (0.113 R)
• M22: 7,412,425 km (0.047 R)
• M23: 7,812,300 km (0.079 R)
• M24: 7,947,088 km (0.1 R)
• M25: 8,356,387 km (0.111 R)
• M26: 9,385,621 km (0.094 R)
• M27: 9,624,977 km (0.037 R)
• M28: 9,818,108 km (0.095 R)
• M29: 10,454,198 km (0.079 R)
• M30: 10,752,347 km (0.063 R)
• M31: 11,103,752 km (0.109 R)
• M32: 11,204,881 km (0.058 R)
• M33: 12,651,941 km (0.063 R)
• M34: 13,236,420 km (0.066 R)
• M35: 13,397,387 km (0.111 R)
• M36: 14,321,603 km (0.108 R)
• M37: 14,376,655 km (0.09 R)
• M38: 14,819,165 km (0.08 R)
• M39: 14,930,615 km (0.051 R)
• M40: 15,548,006 km (0.056 R)
• M41: 16,634,086 km (0.088 R)
• M42: 17,040,245 km (0.046 R)
• M43: 17,156,931 km (0.063 R)
• M44: 17,332,559 km (0.096 R)
• M45: 17,685,311 km (0.037 R)
• M46: 18,159,536 km (0.078 R)
• M47: 18,219,076 km (0.1 R)
• M48: 19,241,577 km (0.085 R)
• M49: 19,302,314 km (0.08 R)
• M50: 19,790,452 km (0.056 R)
• M51: 20,344,413 km (0.078 R)
• M52: 21,467,743 km (0.068 R)
• M53: 21,783,245 km (0.036 R)
• M54: 22,227,700 km (0.106 R)
• M55: 22,546,942 km (0.106 R)
• M56: 25,088,909 km (0.101 R)
• M57: 25,155,331 km (0.062 R)
• M58: 26,225,105 km (0.083 R)
• M59: 26,292,424 km (0.117 R)
• M60: 28,132,777 km (0.087 R)
• M61: 29,522,541 km (0.059 R)
• M62: 31,362,595 km (0.078 R)
• M63: 32,368,641 km (0.101 R)
• M64: 32,513,152 km (0.109 R)
• M65: 33,166,446 km (0.077 R)
• M66: 33,385,158 km (0.082 R)
• M67: 34,412,297 km (0.067 R)
• M68: 34,707,604 km (0.063 R)
• M69: 34,855,556 km (0.088 R)
• M70: 35,972,154 km (0.112 R)
• M71: 37,783,186 km (0.113 R)
• M72: 38,164,062 km (0.117 R)
• M73: 38,240,507 km (0.114 R)
• M74: 38,623,029 km (0.074 R)
• M75: 39,160,683 km (0.076 R)
• M76: 40,554,636 km (0.103 R)
• M77: 41,336,136 km (0.082 R)
• M78: 41,728,680 km (0.053 R)
• M79: 42,675,934 km (0.118 R)
• M80: 42,913,795 km (0.113 R)
• M81: 46,780,002 km (0.072 R)
• M82: 47,435,091 km (0.088 R)
• M83: 48,010,893 km (0.079 R)
• M84: 48,671,667 km (0.119 R)
• M85: 49,501,935 km (0.101 R)
• M86: 49,751,913 km (0.026 R)
• M87: 50,085,816 km (0.096 R)
• M88: 50,588,166 km (0.057 R)
• M89: 51,766,847 km (0.11 R)
• M90: 54,752,821 km (0.081 R)
• M91: 55,097,494 km (0.092 R)
• M92: 56,396,901 km (0.052 R)
• M93: 57,618,817 km (0.091 R)

Planet 9 - Ice Giant

Semi-Major Axis: 13.48 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 190.2

Radius: 3.5

Gravity: 15.53 G

Time & Orbit

Eccentricity (e): 0.167

Orbit Range: 11.23 AU - 15.73 AU

Year: 17558 Days

Day: 17.3 Hours

Environment

Temp: -184 °C

Axial Tilt: 17.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 45,511,541 km

• M1: 47,572 km (0.105 R)
• M2: 598,242 km (0.112 R)
• M3: 662,270 km (0.098 R)
• M4: 695,181 km (0.117 R)
• M5: 745,446 km (0.104 R)
• M6: 849,716 km (0.094 R)
• M7: 1,312,273 km (0.08 R)
• M8: 1,395,898 km (0.056 R)
• M9: 2,125,786 km (0.054 R)
• M10: 2,248,905 km (0.081 R)
• M11: 3,230,566 km (0.112 R)
• M12: 4,232,872 km (0.103 R)
• M13: 4,863,876 km (0.09 R)
• M14: 4,993,577 km (0.085 R)
• M15: 5,223,210 km (0.09 R)
• M16: 5,256,420 km (0.072 R)
• M17: 5,356,053 km (0.081 R)
• M18: 5,692,947 km (0.119 R)
• M19: 5,829,679 km (0.092 R)
• M20: 6,246,160 km (0.087 R)
• M21: 6,708,118 km (0.12 R)
• M22: 6,852,480 km (0.101 R)
• M23: 8,043,728 km (0.054 R)
• M24: 8,428,942 km (0.108 R)
• M25: 9,946,613 km (0.061 R)
• M26: 11,849,348 km (0.098 R)
• M27: 12,730,180 km (0.092 R)
• M28: 12,864,070 km (0.088 R)
• M29: 13,268,733 km (0.103 R)
• M30: 13,449,896 km (0.116 R)
• M31: 13,723,211 km (0.084 R)
• M32: 14,834,574 km (0.066 R)
• M33: 15,496,095 km (0.07 R)
• M34: 15,686,833 km (0.096 R)
• M35: 15,926,339 km (0.098 R)
• M36: 16,457,711 km (0.062 R)
• M37: 17,142,270 km (0.065 R)
• M38: 17,388,957 km (0.083 R)
• M39: 17,438,474 km (0.102 R)
• M40: 17,487,991 km (0.111 R)
• M41: 21,016,855 km (0.096 R)
• M42: 21,175,130 km (0.075 R)
• M43: 22,779,717 km (0.099 R)
• M44: 23,925,935 km (0.032 R)
• M45: 24,867,504 km (0.097 R)
• M46: 26,843,842 km (0.07 R)
• M47: 26,900,988 km (0.119 R)
• M48: 27,648,379 km (0.112 R)
• M49: 27,706,124 km (0.046 R)
• M50: 28,053,640 km (0.098 R)
• M51: 28,402,502 km (0.097 R)
• M52: 29,694,130 km (0.037 R)
• M53: 30,109,115 km (0.062 R)
• M54: 30,346,975 km (0.12 R)
• M55: 31,727,464 km (0.079 R)
• M56: 33,681,961 km (0.082 R)
• M57: 33,743,745 km (0.063 R)
• M58: 34,114,747 km (0.103 R)
• M59: 34,985,556 km (0.085 R)
• M60: 35,926,826 km (0.117 R)
• M61: 38,735,526 km (0.116 R)
• M62: 39,643,735 km (0.066 R)
• M63: 40,165,981 km (0.097 R)
• M64: 41,217,205 km (0.062 R)
• M65: 42,011,570 km (0.103 R)
• M66: 43,413,751 km (0.111 R)
• M67: 43,480,920 km (0.096 R)
• M68: 43,682,578 km (0.105 R)
• M69: 43,884,535 km (0.051 R)
• M70: 45,511,562 km (0.074 R)

Kuiper Belt

Range: 30.9 - 57.9 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 364 - 20,111 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit