🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.74 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.57

Radius: 1.66

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.121

Orbit Range: 0.65 AU - 0.83 AU

Year: 233 Days

Day: 30.2 Hours

Environment

Temp: 136 °C

Axial Tilt: 12.2 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 51,317,489 km

• M1: 129,253 km (0.03 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.36 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.72

Radius: 1.49

Gravity: 1.23 G

Time & Orbit

Eccentricity (e): 0.241

Orbit Range: 1.03 AU - 1.69 AU

Year: 579 Days

Day: 23.1 Hours

Environment

Temp: -22 °C

Axial Tilt: 37.9 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 3 - Terrestrial

Semi-Major Axis: 1.36 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.96

Radius: 1.73

Gravity: 1.32 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 1.27 AU - 1.45 AU

Year: 579 Days

Day: 45.6 Hours

Environment

Temp: -2 °C

Axial Tilt: 1.9 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (1)

Outer Limit: 51,317,489 km

• M1: 625,917 km (0.112 R)

Planet 4 - Terrestrial

Semi-Major Axis: 1.68 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.16

Radius: 1.77

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.111

Orbit Range: 1.49 AU - 1.87 AU

Year: 795 Days

Day: 12.9 Hours

Environment

Temp: -56 °C

Axial Tilt: 19 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 2.07 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.69

Radius: 1.86

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.242

Orbit Range: 1.57 AU - 2.57 AU

Year: 1088 Days

Day: 34.7 Hours

Environment

Temp: -61 °C

Axial Tilt: 19.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 5.18 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 745.6

Radius: 9

Gravity: 9.2 G

Time & Orbit

Eccentricity (e): 0.064

Orbit Range: 4.85 AU - 5.51 AU

Year: 4306 Days

Day: 5.4 Hours

Environment

Temp: -138 °C

Axial Tilt: 49.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 51,317,489 km

• M1: 112,797 km (0.103 R)
• M2: 197,170 km (0.105 R)
• M3: 397,332 km (0.107 R)
• M4: 931,995 km (0.083 R)
• M5: 1,175,690 km (0.082 R)
• M6: 1,305,241 km (0.089 R)
• M7: 1,706,463 km (0.108 R)
• M8: 2,144,485 km (0.109 R)
• M9: 2,215,096 km (0.099 R)
• M10: 2,358,410 km (0.103 R)
• M11: 2,523,417 km (0.116 R)
• M12: 2,597,917 km (0.079 R)
• M13: 2,730,311 km (0.073 R)
• M14: 3,001,681 km (0.078 R)
• M15: 3,080,819 km (0.085 R)
• M16: 3,261,533 km (0.105 R)
• M17: 3,384,053 km (0.038 R)
• M18: 3,612,489 km (0.111 R)
• M19: 4,019,096 km (0.034 R)
• M20: 4,084,620 km (0.038 R)
• M21: 4,350,306 km (0.06 R)
• M22: 4,690,492 km (0.107 R)
• M23: 4,852,357 km (0.06 R)
• M24: 5,252,830 km (0.076 R)
• M25: 5,590,622 km (0.08 R)
• M26: 6,853,976 km (0.112 R)
• M27: 7,170,076 km (0.098 R)
• M28: 7,463,887 km (0.099 R)
• M29: 7,598,824 km (0.102 R)
• M30: 7,843,716 km (0.116 R)
• M31: 7,925,845 km (0.114 R)
• M32: 8,509,426 km (0.111 R)
• M33: 8,650,347 km (0.101 R)
• M34: 8,849,013 km (0.034 R)
• M35: 9,570,823 km (0.105 R)
• M36: 9,983,414 km (0.101 R)
• M37: 10,221,723 km (0.111 R)
• M38: 10,371,620 km (0.063 R)
• M39: 10,461,977 km (0.074 R)
• M40: 10,643,290 km (0.112 R)
• M41: 10,704,027 km (0.119 R)
• M42: 11,565,860 km (0.064 R)
• M43: 11,690,924 km (0.055 R)
• M44: 12,100,074 km (0.085 R)
• M45: 12,163,504 km (0.053 R)
• M46: 12,674,380 km (0.052 R)
• M47: 12,964,899 km (0.107 R)
• M48: 13,192,438 km (0.12 R)
• M49: 13,388,411 km (0.073 R)
• M50: 13,585,431 km (0.075 R)
• M51: 13,816,560 km (0.114 R)
• M52: 13,916,043 km (0.091 R)
• M53: 15,539,030 km (0.077 R)
• M54: 16,023,578 km (0.115 R)
• M55: 16,724,444 km (0.12 R)
• M56: 17,758,464 km (0.111 R)
• M57: 18,011,135 km (0.109 R)
• M58: 18,739,676 km (0.114 R)
• M59: 19,033,935 km (0.119 R)
• M60: 19,107,687 km (0.099 R)
• M61: 19,626,642 km (0.057 R)
• M62: 19,925,389 km (0.104 R)
• M63: 20,527,221 km (0.116 R)
• M64: 20,602,918 km (0.083 R)
• M65: 20,868,454 km (0.059 R)
• M66: 21,556,455 km (0.091 R)
• M67: 21,826,030 km (0.111 R)
• M68: 22,096,802 km (0.054 R)
• M69: 22,368,622 km (0.085 R)
• M70: 22,915,551 km (0.115 R)
• M71: 23,033,285 km (0.057 R)
• M72: 23,744,324 km (0.093 R)
• M73: 24,222,289 km (0.044 R)
• M74: 24,824,121 km (0.075 R)
• M75: 25,309,117 km (0.1 R)
• M76: 25,634,343 km (0.087 R)
• M77: 26,824,394 km (0.108 R)
• M78: 27,781,222 km (0.106 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 739.5

Radius: 11.2

Gravity: 5.9 G

Time & Orbit

Eccentricity (e): 0.199

Orbit Range: 4.85 AU - 7.25 AU

Year: 5435 Days

Day: 5 Hours

Environment

Temp: -157 °C

Axial Tilt: 31.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 51,317,489 km

• M1: 158,424 km (0.108 R)
• M2: 292,015 km (0.048 R)
• M3: 410,048 km (0.084 R)
• M4: 630,555 km (0.088 R)
• M5: 704,756 km (0.066 R)
• M6: 1,528,890 km (0.088 R)
• M7: 1,720,974 km (0.092 R)
• M8: 1,792,930 km (0.06 R)
• M9: 2,608,837 km (0.079 R)
• M10: 2,713,107 km (0.089 R)
• M11: 2,818,723 km (0.064 R)
• M12: 2,968,919 km (0.068 R)
• M13: 3,299,830 km (0.118 R)
• M14: 3,854,240 km (0.081 R)
• M15: 3,949,384 km (0.106 R)
• M16: 4,313,655 km (0.117 R)
• M17: 4,562,585 km (0.079 R)
• M18: 4,816,303 km (0.028 R)
• M19: 4,970,838 km (0.101 R)
• M20: 5,284,694 km (0.093 R)
• M21: 5,390,759 km (0.094 R)
• M22: 5,470,794 km (0.071 R)
• M23: 5,877,102 km (0.114 R)
• M24: 6,042,258 km (0.098 R)
• M25: 6,265,009 km (0.054 R)
• M26: 6,405,631 km (0.118 R)
• M27: 6,776,185 km (0.117 R)
• M28: 8,081,576 km (0.044 R)
• M29: 8,606,515 km (0.094 R)
• M30: 9,366,323 km (0.082 R)
• M31: 9,495,126 km (0.114 R)
• M32: 9,819,604 km (0.076 R)
• M33: 10,180,733 km (0.072 R)
• M34: 10,446,120 km (0.102 R)
• M35: 11,051,692 km (0.045 R)
• M36: 11,358,667 km (0.095 R)
• M37: 11,633,927 km (0.071 R)
• M38: 12,721,653 km (0.088 R)
• M39: 12,900,124 km (0.094 R)
• M40: 13,151,298 km (0.099 R)
• M41: 13,404,268 km (0.075 R)
• M42: 13,988,298 km (0.09 R)
• M43: 14,431,856 km (0.075 R)
• M44: 14,692,755 km (0.073 R)
• M45: 14,955,150 km (0.033 R)
• M46: 15,143,643 km (0.084 R)
• M47: 15,599,019 km (0.102 R)
• M48: 16,523,384 km (0.062 R)
• M49: 17,624,125 km (0.091 R)
• M50: 17,703,711 km (0.072 R)
• M51: 18,263,806 km (0.071 R)
• M52: 19,033,337 km (0.076 R)
• M53: 20,729,627 km (0.051 R)
• M54: 21,319,941 km (0.071 R)
• M55: 21,447,099 km (0.059 R)
• M56: 22,172,798 km (0.113 R)
• M57: 24,132,231 km (0.073 R)
• M58: 24,575,190 km (0.08 R)
• M59: 24,664,051 km (0.098 R)
• M60: 25,065,572 km (0.098 R)
• M61: 25,784,539 km (0.1 R)
• M62: 26,282,700 km (0.108 R)
• M63: 26,738,525 km (0.109 R)
• M64: 27,842,856 km (0.107 R)
• M65: 28,493,906 km (0.086 R)
• M66: 28,634,080 km (0.049 R)
• M67: 28,868,350 km (0.037 R)
• M68: 29,009,121 km (0.09 R)
• M69: 29,338,536 km (0.114 R)
• M70: 29,811,265 km (0.117 R)
• M71: 30,048,528 km (0.098 R)
• M72: 30,334,110 km (0.116 R)
• M73: 30,572,868 km (0.101 R)
• M74: 31,340,754 km (0.053 R)
• M75: 31,582,205 km (0.08 R)
• M76: 31,678,845 km (0.114 R)
• M77: 32,261,080 km (0.117 R)

Planet 8 - Gas Giant

Semi-Major Axis: 7.66 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 185.7

Radius: 8.1

Gravity: 2.83 G

Time & Orbit

Eccentricity (e): 0.082

Orbit Range: 7.03 AU - 8.29 AU

Year: 7743 Days

Day: 8.7 Hours

Environment

Temp: -161 °C

Axial Tilt: 1.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 51,317,489 km

• M1: 333,154 km (0.035 R)
• M2: 483,650 km (0.106 R)
• M3: 542,591 km (0.104 R)
• M4: 668,403 km (0.107 R)
• M5: 875,896 km (0.094 R)
• M6: 1,051,374 km (0.104 R)
• M7: 1,509,891 km (0.09 R)
• M8: 1,599,500 km (0.096 R)
• M9: 1,706,313 km (0.067 R)
• M10: 1,784,104 km (0.056 R)
• M11: 1,847,235 km (0.104 R)
• M12: 2,140,746 km (0.1 R)
• M13: 2,396,558 km (0.071 R)
• M14: 2,449,067 km (0.093 R)
• M15: 2,608,538 km (0.074 R)
• M16: 2,808,102 km (0.073 R)
• M17: 2,863,453 km (0.115 R)
• M18: 3,695,965 km (0.097 R)
• M19: 3,961,651 km (0.03 R)
• M20: 4,065,472 km (0.092 R)
• M21: 4,425,554 km (0.104 R)
• M22: 4,598,489 km (0.052 R)
• M23: 4,707,695 km (0.07 R)
• M24: 4,973,531 km (0.11 R)
• M25: 5,108,169 km (0.101 R)
• M26: 5,198,676 km (0.079 R)
• M27: 5,450,299 km (0.12 R)
• M28: 5,542,900 km (0.071 R)
• M29: 5,612,613 km (0.106 R)
• M30: 5,776,423 km (0.114 R)
• M31: 5,941,878 km (0.117 R)
• M32: 6,180,935 km (0.075 R)
• M33: 6,398,750 km (0.119 R)
• M34: 6,496,288 km (0.108 R)
• M35: 6,569,890 km (0.106 R)
• M36: 7,117,867 km (0.119 R)
• M37: 7,397,316 km (0.076 R)
• M38: 8,045,822 km (0.115 R)
• M39: 8,124,960 km (0.085 R)
• M40: 8,283,832 km (0.083 R)
• M41: 8,577,792 km (0.111 R)
• M42: 8,658,575 km (0.101 R)
• M43: 9,093,606 km (0.114 R)
• M44: 9,703,516 km (0.1 R)
• M45: 10,355,314 km (0.03 R)
• M46: 10,845,995 km (0.058 R)
• M47: 11,167,631 km (0.105 R)
• M48: 12,576,843 km (0.095 R)
• M49: 12,883,967 km (0.097 R)
• M50: 13,069,319 km (0.072 R)
• M51: 13,286,834 km (0.044 R)
• M52: 13,505,397 km (0.114 R)
• M53: 13,599,494 km (0.086 R)
• M54: 13,693,740 km (0.104 R)
• M55: 14,359,900 km (0.059 R)
• M56: 14,519,969 km (0.097 R)
• M57: 14,584,296 km (0.106 R)
• M58: 14,971,605 km (0.091 R)
• M59: 16,054,245 km (0.097 R)
• M60: 16,253,809 km (0.092 R)
• M61: 16,655,479 km (0.115 R)
• M62: 16,722,648 km (0.068 R)
• M63: 16,924,905 km (0.068 R)
• M64: 17,366,069 km (0.095 R)
• M65: 18,294,174 km (0.115 R)
• M66: 18,363,587 km (0.12 R)
• M67: 18,502,713 km (0.105 R)
• M68: 19,344,351 km (0.091 R)
• M69: 20,811,009 km (0.06 R)
• M70: 21,064,876 km (0.109 R)
• M71: 21,246,937 km (0.08 R)
• M72: 21,429,446 km (0.112 R)
• M73: 21,759,459 km (0.096 R)
• M74: 22,461,372 km (0.076 R)
• M75: 22,721,972 km (0.103 R)
• M76: 23,095,817 km (0.112 R)
• M77: 24,344,061 km (0.025 R)
• M78: 24,458,653 km (0.061 R)
• M79: 25,034,156 km (0.107 R)
• M80: 25,304,330 km (0.052 R)
• M81: 25,691,789 km (0.066 R)
• M82: 25,886,416 km (0.058 R)

Planet 9 - Ice Giant

Semi-Major Axis: 14.3 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 598.9

Radius: 5.7

Gravity: 18.43 G

Time & Orbit

Eccentricity (e): 0.207

Orbit Range: 11.34 AU - 17.26 AU

Year: 19751 Days

Day: 19.5 Hours

Environment

Temp: -182 °C

Axial Tilt: 34.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (98)

Outer Limit: 51,317,489 km

• M1: 604,824 km (0.114 R)
• M2: 758,910 km (0.061 R)
• M3: 852,708 km (0.111 R)
• M4: 1,077,703 km (0.09 R)
• M5: 1,434,494 km (0.108 R)
• M6: 1,701,975 km (0.094 R)
• M7: 2,115,164 km (0.069 R)
• M8: 3,142,453 km (0.081 R)
• M9: 3,726,034 km (0.09 R)
• M10: 3,887,301 km (0.113 R)
• M11: 4,009,672 km (0.058 R)
• M12: 4,946,005 km (0.104 R)
• M13: 4,990,136 km (0.117 R)
• M14: 5,393,153 km (0.114 R)
• M15: 5,621,439 km (0.038 R)
• M16: 5,667,515 km (0.034 R)
• M17: 5,806,492 km (0.075 R)
• M18: 5,946,665 km (0.054 R)
• M19: 6,908,729 km (0.08 R)
• M20: 7,661,505 km (0.119 R)
• M21: 7,763,980 km (0.12 R)
• M22: 7,969,976 km (0.113 R)
• M23: 8,230,127 km (0.101 R)
• M24: 8,440,162 km (0.118 R)
• M25: 8,598,886 km (0.076 R)
• M26: 9,352,709 km (0.108 R)
• M27: 9,516,968 km (0.083 R)
• M28: 10,071,527 km (0.082 R)
• M29: 10,352,621 km (0.097 R)
• M30: 10,693,405 km (0.119 R)
• M31: 10,807,848 km (0.092 R)
• M32: 11,327,850 km (0.093 R)
• M33: 11,444,536 km (0.119 R)
• M34: 11,503,029 km (0.05 R)
• M35: 11,855,930 km (0.025 R)
• M36: 12,093,193 km (0.083 R)
• M37: 13,302,991 km (0.113 R)
• M38: 13,426,110 km (0.073 R)
• M39: 14,487,507 km (0.036 R)
• M40: 14,614,216 km (0.031 R)
• M41: 15,900,758 km (0.062 R)
• M42: 16,031,357 km (0.116 R)
• M43: 17,089,313 km (0.114 R)
• M44: 17,156,183 km (0.057 R)
• M45: 17,761,905 km (0.064 R)
• M46: 18,237,925 km (0.057 R)
• M47: 18,374,658 km (0.053 R)
• M48: 19,341,509 km (0.061 R)
• M49: 20,042,225 km (0.095 R)
• M50: 20,324,816 km (0.102 R)
• M51: 21,037,201 km (0.074 R)
• M52: 22,632,811 km (0.051 R)
• M53: 23,593,828 km (0.046 R)
• M54: 24,267,019 km (0.097 R)
• M55: 24,794,800 km (0.042 R)
• M56: 24,946,343 km (0.09 R)
• M57: 25,402,766 km (0.074 R)
• M58: 26,169,604 km (0.113 R)
• M59: 26,323,840 km (0.04 R)
• M60: 27,726,021 km (0.112 R)
• M61: 28,040,774 km (0.078 R)
• M62: 28,515,299 km (0.1 R)
• M63: 29,072,252 km (0.081 R)
• M64: 31,992,701 km (0.075 R)
• M65: 32,240,286 km (0.099 R)
• M66: 34,327,924 km (0.048 R)
• M67: 35,686,722 km (0.068 R)
• M68: 38,019,401 km (0.093 R)
• M69: 38,369,161 km (0.092 R)
• M70: 40,400,999 km (0.041 R)
• M71: 41,026,169 km (0.072 R)
• M72: 41,205,387 km (0.095 R)
• M73: 41,654,630 km (0.118 R)
• M74: 41,744,687 km (0.051 R)
• M75: 43,012,081 km (0.097 R)
• M76: 44,383,893 km (0.095 R)
• M77: 45,028,959 km (0.086 R)
• M78: 45,399,064 km (0.042 R)
• M79: 46,982,857 km (0.114 R)
• M80: 47,264,250 km (0.107 R)
• M81: 51,261,954 km (0.068 R)
• M82: 51,454,936 km (0.095 R)
• M83: 53,105,599 km (0.096 R)
• M84: 53,692,321 km (0.067 R)
• M85: 54,379,574 km (0.088 R)
• M86: 55,961,422 km (0.118 R)
• M87: 57,457,849 km (0.061 R)
• M88: 58,967,591 km (0.108 R)
• M89: 59,068,719 km (0.092 R)
• M90: 59,372,403 km (0.106 R)
• M91: 60,184,719 km (0.119 R)
• M92: 61,615,174 km (0.092 R)
• M93: 61,923,196 km (0.104 R)
• M94: 63,263,593 km (0.103 R)
• M95: 64,197,233 km (0.088 R)
• M96: 64,509,444 km (0.09 R)
• M97: 66,288,163 km (0.115 R)
• M98: 71,396,930 km (0.11 R)

Planet 10 - Ice Giant

Semi-Major Axis: 19.63 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 83.3

Radius: 5.5

Gravity: 2.75 G

Time & Orbit

Eccentricity (e): 0.145

Orbit Range: 16.78 AU - 22.48 AU

Year: 31767 Days

Day: 20.3 Hours

Environment

Temp: -191 °C

Axial Tilt: 13.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (52)

Outer Limit: 51,317,489 km

• M1: 321,486 km (0.07 R)
• M2: 607,367 km (0.067 R)
• M3: 1,713,344 km (0.074 R)
• M4: 2,753,050 km (0.079 R)
• M5: 3,256,596 km (0.107 R)
• M6: 4,047,520 km (0.033 R)
• M7: 4,413,736 km (0.089 R)
• M8: 5,429,056 km (0.102 R)
• M9: 6,513,042 km (0.104 R)
• M10: 7,020,179 km (0.09 R)
• M11: 7,459,099 km (0.096 R)
• M12: 7,499,491 km (0.043 R)
• M13: 7,824,866 km (0.09 R)
• M14: 9,301,996 km (0.087 R)
• M15: 9,432,595 km (0.114 R)
• M16: 9,739,569 km (0.077 R)
• M17: 10,228,605 km (0.088 R)
• M18: 10,544,107 km (0.098 R)
• M19: 10,725,719 km (0.095 R)
• M20: 11,369,588 km (0.078 R)
• M21: 11,509,312 km (0.118 R)
• M22: 12,454,472 km (0.076 R)
• M23: 12,887,857 km (0.11 R)
• M24: 14,620,050 km (0.071 R)
• M25: 15,333,034 km (0.093 R)
• M26: 16,057,387 km (0.034 R)
• M27: 16,318,884 km (0.091 R)
• M28: 16,371,243 km (0.06 R)
• M29: 16,423,752 km (0.119 R)
• M30: 19,507,862 km (0.096 R)
• M31: 19,786,712 km (0.111 R)
• M32: 20,858,581 km (0.097 R)
• M33: 23,116,910 km (0.095 R)
• M34: 23,293,884 km (0.115 R)
• M35: 26,123,678 km (0.112 R)
• M36: 28,615,978 km (0.089 R)
• M37: 30,534,421 km (0.084 R)
• M38: 32,296,236 km (0.098 R)
• M39: 33,023,281 km (0.11 R)
• M40: 35,101,495 km (0.112 R)
• M41: 35,849,035 km (0.036 R)
• M42: 37,706,143 km (0.085 R)
• M43: 38,541,348 km (0.102 R)
• M44: 38,611,360 km (0.116 R)
• M45: 40,869,839 km (0.087 R)
• M46: 42,159,074 km (0.114 R)
• M47: 44,556,978 km (0.109 R)
• M48: 46,179,965 km (0.107 R)
• M49: 47,522,307 km (0.11 R)
• M50: 49,407,689 km (0.09 R)
• M51: 50,016,253 km (0.048 R)
• M52: 50,092,398 km (0.056 R)

Kuiper Belt

Range: 30 - 48 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 316 - 16,279 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit