🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 1.34 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 149.5

Radius: 11.7

Gravity: 1.09 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 1.26 AU - 1.42 AU

Year: 986 Days

Day: 5.4 Hours

Environment

Temp: -173 °C

Axial Tilt: 21.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (43)

Outer Limit: 63,078,928 km

• M1: 157,676 km (0.087 R)
• M2: 231,727 km (0.107 R)
• M3: 307,872 km (0.088 R)
• M4: 389,254 km (0.049 R)
• M5: 487,988 km (0.075 R)
• M6: 570,865 km (0.055 R)
• M7: 643,720 km (0.068 R)
• M8: 740,958 km (0.115 R)
• M9: 866,022 km (0.108 R)
• M10: 952,190 km (0.043 R)
• M11: 1,065,436 km (0.097 R)
• M12: 1,173,595 km (0.072 R)
• M13: 1,280,558 km (0.05 R)
• M14: 1,439,281 km (0.069 R)
• M15: 1,610,421 km (0.062 R)
• M16: 1,724,564 km (0.064 R)
• M17: 1,812,079 km (0.066 R)
• M18: 1,895,106 km (0.072 R)
• M19: 2,015,981 km (0.115 R)
• M20: 2,120,849 km (0.077 R)
• M21: 2,246,661 km (0.063 R)
• M22: 2,585,500 km (0.04 R)
• M23: 2,788,654 km (0.097 R)
• M24: 2,871,382 km (0.063 R)
• M25: 3,032,349 km (0.109 R)
• M26: 3,459,002 km (0.116 R)
• M27: 3,555,642 km (0.085 R)
• M28: 3,645,551 km (0.079 R)
• M29: 3,781,984 km (0.038 R)
• M30: 4,193,827 km (0.087 R)
• M31: 4,417,176 km (0.076 R)
• M32: 4,497,959 km (0.056 R)
• M33: 4,652,793 km (0.092 R)
• M34: 4,734,922 km (0.084 R)
• M35: 4,934,187 km (0.109 R)
• M36: 5,085,580 km (0.105 R)
• M37: 5,392,854 km (0.099 R)
• M38: 5,566,238 km (0.088 R)
• M39: 5,671,106 km (0.049 R)
• M40: 5,750,243 km (0.116 R)
• M41: 5,891,763 km (0.034 R)
• M42: 5,971,947 km (0.09 R)
• M43: 6,160,440 km (0.039 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.83 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 102

Radius: 13.8

Gravity: 0.54 G

Time & Orbit

Eccentricity (e): 0.015

Orbit Range: 1.8 AU - 1.86 AU

Year: 1574 Days

Day: 14.4 Hours

Environment

Temp: -181 °C

Axial Tilt: 35.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (32)

Outer Limit: 63,078,928 km

• M1: 189,092 km (0.113 R)
• M2: 350,957 km (0.045 R)
• M3: 457,470 km (0.111 R)
• M4: 566,976 km (0.054 R)
• M5: 848,070 km (0.09 R)
• M6: 1,006,345 km (0.099 R)
• M7: 1,164,171 km (0.102 R)
• M8: 1,688,960 km (0.061 R)
• M9: 1,819,708 km (0.088 R)
• M10: 1,933,702 km (0.063 R)
• M11: 2,161,988 km (0.11 R)
• M12: 2,487,962 km (0.083 R)
• M13: 2,653,118 km (0.072 R)
• M14: 2,744,822 km (0.113 R)
• M15: 2,955,306 km (0.107 R)
• M16: 3,050,450 km (0.106 R)
• M17: 3,171,026 km (0.104 R)
• M18: 3,342,615 km (0.107 R)
• M19: 3,627,000 km (0.109 R)
• M20: 3,763,583 km (0.056 R)
• M21: 4,112,745 km (0.1 R)
• M22: 4,463,402 km (0.111 R)
• M23: 4,554,956 km (0.12 R)
• M24: 4,777,109 km (0.028 R)
• M25: 4,880,182 km (0.115 R)
• M26: 5,397,042 km (0.1 R)
• M27: 5,701,773 km (0.116 R)
• M28: 6,093,271 km (0.073 R)
• M29: 6,328,289 km (0.106 R)
• M30: 6,639,303 km (0.12 R)
• M31: 6,817,923 km (0.109 R)
• M32: 7,395,670 km (0.059 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 35

Radius: 11.3

Gravity: 0.27 G

Time & Orbit

Eccentricity (e): 0.225

Orbit Range: 1.46 AU - 2.3 AU

Year: 1639 Days

Day: 9.7 Hours

Environment

Temp: -177 °C

Axial Tilt: 19.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (37)

Outer Limit: 63,078,928 km

• M1: 140,622 km (0.073 R)
• M2: 213,027 km (0.105 R)
• M3: 297,251 km (0.098 R)
• M4: 533,316 km (0.097 R)
• M5: 639,680 km (0.096 R)
• M6: 765,642 km (0.091 R)
• M7: 844,031 km (0.106 R)
• M8: 1,061,846 km (0.109 R)
• M9: 1,132,605 km (0.056 R)
• M10: 1,251,386 km (0.04 R)
• M11: 1,365,081 km (0.069 R)
• M12: 1,517,072 km (0.069 R)
• M13: 1,618,200 km (0.094 R)
• M14: 1,711,400 km (0.093 R)
• M15: 1,919,490 km (0.1 R)
• M16: 2,119,054 km (0.099 R)
• M17: 2,221,528 km (0.095 R)
• M18: 2,337,317 km (0.067 R)
• M19: 2,532,842 km (0.091 R)
• M20: 2,777,284 km (0.082 R)
• M21: 2,870,933 km (0.109 R)
• M22: 3,016,791 km (0.086 R)
• M23: 3,125,997 km (0.04 R)
• M24: 3,236,700 km (0.053 R)
• M25: 3,335,584 km (0.105 R)
• M26: 3,448,680 km (0.096 R)
• M27: 3,522,581 km (0.102 R)
• M28: 3,679,060 km (0.099 R)
• M29: 3,921,409 km (0.05 R)
• M30: 4,055,149 km (0.082 R)
• M31: 4,233,620 km (0.071 R)
• M32: 4,312,907 km (0.107 R)
• M33: 4,429,294 km (0.035 R)
• M34: 4,502,447 km (0.119 R)
• M35: 4,709,640 km (0.098 R)
• M36: 4,995,970 km (0.092 R)
• M37: 5,164,418 km (0.031 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 55.5

Radius: 10.4

Gravity: 0.51 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 1.69 AU - 2.35 AU

Year: 1825 Days

Day: 13.3 Hours

Environment

Temp: -184 °C

Axial Tilt: 32.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 63,078,928 km

• M1: 129,851 km (0.086 R)
• M2: 213,775 km (0.105 R)
• M3: 384,616 km (0.108 R)
• M4: 468,541 km (0.065 R)
• M5: 584,030 km (0.118 R)
• M6: 675,734 km (0.074 R)
• M7: 768,185 km (0.042 R)
• M8: 851,212 km (0.1 R)
• M9: 932,743 km (0.111 R)
• M10: 1,062,893 km (0.104 R)
• M11: 1,183,319 km (0.088 R)
• M12: 1,281,007 km (0.1 R)
• M13: 1,438,384 km (0.101 R)
• M14: 1,668,615 km (0.112 R)
• M15: 1,760,318 km (0.094 R)
• M16: 1,961,976 km (0.074 R)
• M17: 2,039,617 km (0.116 R)
• M18: 2,131,470 km (0.098 R)
• M19: 2,245,015 km (0.095 R)
• M20: 2,346,891 km (0.1 R)
• M21: 2,506,064 km (0.105 R)
• M22: 2,626,191 km (0.076 R)
• M23: 2,842,808 km (0.119 R)
• M24: 2,908,931 km (0.026 R)
• M25: 2,975,651 km (0.091 R)
• M26: 3,232,212 km (0.081 R)
• M27: 3,386,597 km (0.104 R)
• M28: 3,670,683 km (0.115 R)
• M29: 3,815,643 km (0.029 R)
• M30: 3,937,865 km (0.077 R)
• M31: 4,128,004 km (0.106 R)
• M32: 4,261,894 km (0.077 R)
• M33: 4,448,592 km (0.102 R)
• M34: 4,517,257 km (0.077 R)
• M35: 4,612,102 km (0.088 R)
• M36: 4,821,390 km (0.093 R)
• M37: 4,918,329 km (0.097 R)
• M38: 4,989,239 km (0.101 R)
• M39: 5,141,230 km (0.074 R)
• M40: 5,403,924 km (0.104 R)
• M41: 5,615,455 km (0.106 R)
• M42: 5,820,255 km (0.063 R)
• M43: 5,989,749 km (0.094 R)
• M44: 6,094,168 km (0.074 R)
• M45: 6,295,228 km (0.103 R)
• M46: 6,381,995 km (0.115 R)
• M47: 6,547,151 km (0.09 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 269.6

Radius: 13.6

Gravity: 1.46 G

Time & Orbit

Eccentricity (e): 0.225

Orbit Range: 1.58 AU - 2.5 AU

Year: 1853 Days

Day: 11 Hours

Environment

Temp: -182 °C

Axial Tilt: 31 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (49)

Outer Limit: 63,078,928 km

• M1: 196,272 km (0.099 R)
• M2: 423,661 km (0.11 R)
• M3: 562,787 km (0.058 R)
• M4: 672,143 km (0.074 R)
• M5: 764,595 km (0.112 R)
• M6: 1,085,931 km (0.085 R)
• M7: 1,220,569 km (0.095 R)
• M8: 1,353,412 km (0.096 R)
• M9: 1,617,303 km (0.068 R)
• M10: 1,998,628 km (0.112 R)
• M11: 2,119,652 km (0.119 R)
• M12: 2,477,939 km (0.079 R)
• M13: 2,669,574 km (0.115 R)
• M14: 2,876,767 km (0.112 R)
• M15: 2,982,383 km (0.07 R)
• M16: 3,186,734 km (0.051 R)
• M17: 3,451,522 km (0.061 R)
• M18: 3,632,236 km (0.094 R)
• M19: 3,735,160 km (0.095 R)
• M20: 4,062,181 km (0.092 R)
• M21: 4,229,132 km (0.04 R)
• M22: 4,694,082 km (0.063 R)
• M23: 4,907,409 km (0.069 R)
• M24: 5,317,756 km (0.073 R)
• M25: 5,527,193 km (0.079 R)
• M26: 5,686,065 km (0.027 R)
• M27: 5,873,362 km (0.112 R)
• M28: 6,008,449 km (0.086 R)
• M29: 6,212,949 km (0.108 R)
• M30: 6,615,068 km (0.1 R)
• M31: 7,025,714 km (0.029 R)
• M32: 7,212,413 km (0.103 R)
• M33: 7,827,260 km (0.053 R)
• M34: 7,931,380 km (0.081 R)
• M35: 8,035,949 km (0.119 R)
• M36: 8,201,254 km (0.073 R)
• M37: 8,307,020 km (0.095 R)
• M38: 8,459,012 km (0.095 R)
• M39: 8,550,565 km (0.11 R)
• M40: 8,842,880 km (0.047 R)
• M41: 9,263,848 km (0.1 R)
• M42: 9,595,955 km (0.098 R)
• M43: 9,803,448 km (0.087 R)
• M44: 9,899,789 km (0.071 R)
• M45: 10,451,356 km (0.09 R)
• M46: 10,996,491 km (0.089 R)
• M47: 11,146,687 km (0.037 R)
• M48: 11,247,217 km (0.11 R)
• M49: 11,381,855 km (0.032 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.34 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 81.4

Radius: 8.1

Gravity: 1.24 G

Time & Orbit

Eccentricity (e): 0.239

Orbit Range: 1.78 AU - 2.9 AU

Year: 2276 Days

Day: 10.1 Hours

Environment

Temp: -189 °C

Axial Tilt: 27.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (39)

Outer Limit: 63,078,928 km

• M1: 175,478 km (0.101 R)
• M2: 241,301 km (0.083 R)
• M3: 448,195 km (0.052 R)
• M4: 580,141 km (0.113 R)
• M5: 661,671 km (0.108 R)
• M6: 791,672 km (0.102 R)
• M7: 912,697 km (0.083 R)
• M8: 996,771 km (0.104 R)
• M9: 1,096,253 km (0.104 R)
• M10: 1,147,416 km (0.113 R)
• M11: 1,292,077 km (0.033 R)
• M12: 1,463,965 km (0.11 R)
• M13: 1,520,513 km (0.113 R)
• M14: 1,709,604 km (0.073 R)
• M15: 1,761,964 km (0.052 R)
• M16: 1,929,663 km (0.105 R)
• M17: 2,023,461 km (0.104 R)
• M18: 2,207,616 km (0.107 R)
• M19: 2,322,357 km (0.106 R)
• M20: 2,540,770 km (0.104 R)
• M21: 2,748,412 km (0.059 R)
• M22: 2,898,758 km (0.081 R)
• M23: 2,997,642 km (0.1 R)
• M24: 3,088,448 km (0.047 R)
• M25: 3,254,202 km (0.073 R)
• M26: 3,310,152 km (0.112 R)
• M27: 3,546,666 km (0.103 R)
• M28: 4,278,649 km (0.095 R)
• M29: 4,329,811 km (0.083 R)
• M30: 4,619,881 km (0.04 R)
• M31: 5,023,945 km (0.04 R)
• M32: 5,651,060 km (0.11 R)
• M33: 5,808,885 km (0.074 R)
• M34: 6,117,356 km (0.063 R)
• M35: 6,655,160 km (0.102 R)
• M36: 7,159,604 km (0.112 R)
• M37: 7,477,949 km (0.048 R)
• M38: 7,914,027 km (0.094 R)
• M39: 7,989,573 km (0.081 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.48 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 348.2

Radius: 12.6

Gravity: 2.19 G

Time & Orbit

Eccentricity (e): 0.234

Orbit Range: 3.43 AU - 5.53 AU

Year: 6029 Days

Day: 5.2 Hours

Environment

Temp: -215 °C

Axial Tilt: 22.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 63,078,928 km

• M1: 172,636 km (0.105 R)
• M2: 270,473 km (0.038 R)
• M3: 497,263 km (0.111 R)
• M4: 648,656 km (0.102 R)
• M5: 759,359 km (0.108 R)
• M6: 865,274 km (0.067 R)
• M7: 1,215,333 km (0.113 R)
• M8: 1,399,787 km (0.119 R)
• M9: 1,765,255 km (0.114 R)
• M10: 1,845,290 km (0.083 R)
• M11: 1,976,038 km (0.116 R)
• M12: 2,126,833 km (0.109 R)
• M13: 2,584,602 km (0.094 R)
• M14: 2,694,706 km (0.09 R)
• M15: 3,368,196 km (0.115 R)
• M16: 4,243,344 km (0.12 R)
• M17: 4,684,059 km (0.025 R)
• M18: 5,372,808 km (0.032 R)
• M19: 5,490,691 km (0.095 R)
• M20: 5,585,685 km (0.032 R)
• M21: 5,898,195 km (0.119 R)
• M22: 6,290,590 km (0.117 R)
• M23: 7,308,903 km (0.116 R)
• M24: 7,413,622 km (0.084 R)
• M25: 7,998,250 km (0.111 R)
• M26: 8,405,456 km (0.093 R)
• M27: 9,296,760 km (0.056 R)
• M28: 9,610,018 km (0.083 R)
• M29: 9,984,910 km (0.08 R)
• M30: 10,101,297 km (0.104 R)
• M31: 10,188,812 km (0.104 R)
• M32: 10,335,268 km (0.112 R)
• M33: 10,600,655 km (0.088 R)
• M34: 11,138,160 km (0.098 R)
• M35: 11,654,123 km (0.101 R)
• M36: 12,053,848 km (0.092 R)
• M37: 12,930,342 km (0.088 R)
• M38: 13,120,780 km (0.106 R)
• M39: 13,376,294 km (0.099 R)
• M40: 13,697,929 km (0.081 R)
• M41: 14,645,033 km (0.1 R)
• M42: 15,176,704 km (0.032 R)
• M43: 16,122,312 km (0.088 R)
• M44: 16,293,153 km (0.063 R)
• M45: 16,464,592 km (0.116 R)
• M46: 16,774,858 km (0.11 R)
• M47: 17,017,506 km (0.119 R)
• M48: 17,191,488 km (0.075 R)
• M49: 17,296,207 km (0.084 R)
• M50: 17,506,092 km (0.071 R)
• M51: 17,611,409 km (0.081 R)
• M52: 17,928,706 km (0.064 R)
• M53: 18,354,612 km (0.066 R)
• M54: 18,963,774 km (0.04 R)
• M55: 19,144,189 km (0.113 R)
• M56: 19,434,110 km (0.09 R)
• M57: 19,725,526 km (0.048 R)
• M58: 19,944,987 km (0.101 R)
• M59: 20,054,941 km (0.063 R)
• M60: 20,942,505 km (0.096 R)
• M61: 21,541,345 km (0.094 R)
• M62: 21,805,236 km (0.11 R)
• M63: 21,994,178 km (0.083 R)
• M64: 22,564,744 km (0.082 R)
• M65: 23,332,929 km (0.088 R)
• M66: 23,603,851 km (0.111 R)
• M67: 23,759,134 km (0.102 R)
• M68: 23,992,656 km (0.049 R)
• M69: 24,501,438 km (0.101 R)
• M70: 25,171,936 km (0.07 R)
• M71: 25,410,096 km (0.112 R)
• M72: 26,773,531 km (0.034 R)
• M73: 27,016,627 km (0.069 R)
• M74: 27,178,941 km (0.075 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.11 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 373.7

Radius: 7.6

Gravity: 6.47 G

Time & Orbit

Eccentricity (e): 0.173

Orbit Range: 8.36 AU - 11.86 AU

Year: 20439 Days

Day: 22.6 Hours

Environment

Temp: -228 °C

Axial Tilt: 29.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 63,078,928 km

• M1: 157,527 km (0.106 R)
• M2: 234,121 km (0.085 R)
• M3: 598,391 km (0.111 R)
• M4: 656,136 km (0.047 R)
• M5: 974,331 km (0.116 R)
• M6: 1,114,355 km (0.103 R)
• M7: 1,211,444 km (0.084 R)
• M8: 1,414,149 km (0.119 R)
• M9: 1,492,987 km (0.097 R)
• M10: 1,880,894 km (0.116 R)
• M11: 2,056,522 km (0.043 R)
• M12: 3,046,710 km (0.059 R)
• M13: 3,827,013 km (0.117 R)
• M14: 4,315,899 km (0.071 R)
• M15: 4,431,538 km (0.114 R)
• M16: 4,587,419 km (0.098 R)
• M17: 4,745,095 km (0.08 R)
• M18: 5,025,292 km (0.077 R)
• M19: 5,601,692 km (0.088 R)
• M20: 5,940,531 km (0.111 R)
• M21: 6,026,401 km (0.089 R)
• M22: 6,199,037 km (0.088 R)
• M23: 6,816,577 km (0.045 R)
• M24: 6,906,485 km (0.057 R)
• M25: 7,178,304 km (0.076 R)
• M26: 7,269,709 km (0.099 R)
• M27: 7,361,562 km (0.108 R)
• M28: 7,499,940 km (0.069 R)
• M29: 8,252,716 km (0.092 R)
• M30: 8,589,611 km (0.102 R)
• M31: 9,078,646 km (0.096 R)
• M32: 9,426,461 km (0.065 R)
• M33: 9,627,072 km (0.107 R)
• M34: 9,677,486 km (0.054 R)
• M35: 9,778,614 km (0.092 R)
• M36: 10,032,781 km (0.098 R)
• M37: 10,703,728 km (0.068 R)
• M38: 11,123,798 km (0.108 R)
• M39: 11,442,442 km (0.047 R)
• M40: 11,602,960 km (0.106 R)
• M41: 12,143,158 km (0.117 R)
• M42: 12,416,474 km (0.075 R)
• M43: 13,024,589 km (0.116 R)
• M44: 13,192,139 km (0.116 R)
• M45: 14,097,804 km (0.1 R)
• M46: 14,500,372 km (0.109 R)
• M47: 15,790,055 km (0.069 R)
• M48: 16,569,161 km (0.065 R)
• M49: 17,299,647 km (0.098 R)
• M50: 20,453,918 km (0.057 R)
• M51: 21,963,211 km (0.108 R)
• M52: 22,832,076 km (0.111 R)
• M53: 25,435,827 km (0.077 R)
• M54: 26,066,083 km (0.111 R)
• M55: 26,914,452 km (0.078 R)
• M56: 27,987,667 km (0.069 R)
• M57: 28,059,624 km (0.093 R)
• M58: 28,710,823 km (0.073 R)
• M59: 29,147,799 km (0.108 R)
• M60: 29,440,263 km (0.108 R)
• M61: 32,040,722 km (0.111 R)
• M62: 33,635,884 km (0.118 R)
• M63: 33,712,479 km (0.072 R)
• M64: 34,327,475 km (0.087 R)
• M65: 34,559,053 km (0.095 R)
• M66: 35,023,704 km (0.088 R)
• M67: 37,457,362 km (0.1 R)
• M68: 37,695,821 km (0.042 R)
• M69: 38,654,444 km (0.069 R)
• M70: 38,734,629 km (0.118 R)
• M71: 39,621,146 km (0.077 R)
• M72: 39,701,929 km (0.095 R)
• M73: 41,086,008 km (0.045 R)
• M74: 43,566,490 km (0.083 R)
• M75: 44,740,684 km (0.098 R)
• M76: 47,034,319 km (0.104 R)
• M77: 48,671,069 km (0.09 R)
• M78: 49,540,083 km (0.091 R)
• M79: 49,976,460 km (0.117 R)
• M80: 51,381,633 km (0.113 R)
• M81: 51,734,833 km (0.088 R)
• M82: 52,621,649 km (0.106 R)
• M83: 55,221,511 km (0.05 R)
• M84: 55,674,044 km (0.042 R)
• M85: 55,946,163 km (0.084 R)
• M86: 56,491,597 km (0.098 R)
• M87: 57,313,188 km (0.08 R)
• M88: 57,496,296 km (0.06 R)
• M89: 57,587,850 km (0.063 R)
• M90: 58,414,677 km (0.081 R)
• M91: 58,783,436 km (0.047 R)
• M92: 60,265,951 km (0.115 R)
• M93: 60,918,497 km (0.104 R)

Kuiper Belt

Range: 30 - 56 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 245 - 13,175 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit