🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 45.5

Radius: 14.3

Gravity: 0.22 G

Time & Orbit

Eccentricity (e): 0.124

Orbit Range: 0.49 AU - 0.63 AU

Year: 295 Days

Day: 5.5 Hours

Environment

Temp: -136 °C

Axial Tilt: 31.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 27,940,383 km

• M1: 180,864 km (0.118 R)
• M2: 272,119 km (0.109 R)
• M3: 368,460 km (0.106 R)
• M4: 469,588 km (0.094 R)
• M5: 635,043 km (0.091 R)
• M6: 785,688 km (0.091 R)
• M7: 901,926 km (0.054 R)
• M8: 1,016,817 km (0.12 R)
• M9: 1,149,660 km (0.097 R)
• M10: 1,315,264 km (0.107 R)
• M11: 1,473,240 km (0.11 R)
• M12: 1,576,014 km (0.045 R)
• M13: 1,712,896 km (0.108 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 979.8

Radius: 8.2

Gravity: 14.57 G

Time & Orbit

Eccentricity (e): 0.204

Orbit Range: 0.6 AU - 0.9 AU

Year: 457 Days

Day: 5.2 Hours

Environment

Temp: -172 °C

Axial Tilt: 27.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 27,940,383 km

• M1: 102,175 km (0.097 R)
• M2: 154,385 km (0.089 R)
• M3: 227,838 km (0.077 R)
• M4: 346,618 km (0.118 R)
• M5: 402,418 km (0.112 R)
• M6: 524,789 km (0.101 R)
• M7: 599,588 km (0.055 R)
• M8: 709,842 km (0.073 R)
• M9: 765,492 km (0.03 R)
• M10: 841,937 km (0.088 R)
• M11: 911,201 km (0.099 R)
• M12: 1,023,997 km (0.043 R)
• M13: 1,174,493 km (0.059 R)
• M14: 1,297,911 km (0.104 R)
• M15: 1,419,833 km (0.107 R)
• M16: 1,497,325 km (0.069 R)
• M17: 1,570,179 km (0.046 R)
• M18: 1,631,664 km (0.117 R)
• M19: 1,725,611 km (0.119 R)
• M20: 1,879,847 km (0.08 R)
• M21: 2,092,575 km (0.115 R)
• M22: 2,174,255 km (0.076 R)
• M23: 2,229,457 km (0.084 R)
• M24: 2,341,207 km (0.07 R)
• M25: 2,461,932 km (0.097 R)
• M26: 2,577,571 km (0.097 R)
• M27: 2,731,956 km (0.106 R)
• M28: 2,806,606 km (0.088 R)
• M29: 2,965,628 km (0.089 R)
• M30: 3,158,759 km (0.085 R)
• M31: 3,245,077 km (0.1 R)
• M32: 3,324,364 km (0.042 R)
• M33: 3,484,583 km (0.068 R)
• M34: 3,565,665 km (0.067 R)
• M35: 3,647,495 km (0.072 R)
• M36: 3,738,152 km (0.116 R)
• M37: 3,879,671 km (0.093 R)
• M38: 3,955,368 km (0.099 R)
• M39: 4,057,094 km (0.075 R)
• M40: 4,125,460 km (0.115 R)
• M41: 4,237,210 km (0.109 R)
• M42: 4,289,121 km (0.061 R)
• M43: 4,428,695 km (0.107 R)
• M44: 4,667,753 km (0.079 R)
• M45: 4,829,318 km (0.067 R)
• M46: 4,974,578 km (0.031 R)
• M47: 5,204,510 km (0.113 R)
• M48: 5,288,135 km (0.105 R)
• M49: 5,799,311 km (0.067 R)
• M50: 5,885,928 km (0.117 R)
• M51: 5,953,696 km (0.092 R)
• M52: 6,031,487 km (0.041 R)
• M53: 6,276,678 km (0.089 R)
• M54: 6,435,401 km (0.029 R)
• M55: 6,505,263 km (0.12 R)
• M56: 6,595,321 km (0.075 R)
• M57: 6,756,737 km (0.061 R)
• M58: 6,817,474 km (0.081 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.07 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 956.3

Radius: 10.9

Gravity: 8.05 G

Time & Orbit

Eccentricity (e): 0.162

Orbit Range: 0.9 AU - 1.24 AU

Year: 778 Days

Day: 12.4 Hours

Environment

Temp: -173 °C

Axial Tilt: 45.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (60)

Outer Limit: 27,940,383 km

• M1: 175,927 km (0.109 R)
• M2: 317,746 km (0.054 R)
• M3: 395,537 km (0.084 R)
• M4: 501,302 km (0.082 R)
• M5: 571,314 km (0.1 R)
• M6: 678,127 km (0.094 R)
• M7: 769,083 km (0.05 R)
• M8: 858,542 km (0.085 R)
• M9: 939,175 km (0.052 R)
• M10: 1,042,248 km (0.105 R)
• M11: 1,122,283 km (0.048 R)
• M12: 1,218,325 km (0.091 R)
• M13: 1,331,720 km (0.105 R)
• M14: 1,426,715 km (0.099 R)
• M15: 1,561,951 km (0.055 R)
• M16: 1,837,660 km (0.079 R)
• M17: 1,911,113 km (0.075 R)
• M18: 2,078,064 km (0.098 R)
• M19: 2,364,095 km (0.111 R)
• M20: 2,672,267 km (0.106 R)
• M21: 2,897,711 km (0.069 R)
• M22: 3,109,841 km (0.104 R)
• M23: 3,337,229 km (0.037 R)
• M24: 3,549,658 km (0.075 R)
• M25: 3,621,465 km (0.114 R)
• M26: 3,766,575 km (0.102 R)
• M27: 3,924,102 km (0.092 R)
• M28: 4,094,793 km (0.066 R)
• M29: 4,235,116 km (0.066 R)
• M30: 4,421,215 km (0.049 R)
• M31: 4,509,777 km (0.111 R)
• M32: 4,621,228 km (0.066 R)
• M33: 4,767,535 km (0.099 R)
• M34: 4,881,229 km (0.068 R)
• M35: 5,030,228 km (0.069 R)
• M36: 5,111,161 km (0.119 R)
• M37: 5,415,443 km (0.108 R)
• M38: 5,569,978 km (0.104 R)
• M39: 5,822,499 km (0.115 R)
• M40: 5,895,353 km (0.08 R)
• M41: 5,992,891 km (0.114 R)
• M42: 6,264,261 km (0.096 R)
• M43: 6,426,425 km (0.116 R)
• M44: 6,552,088 km (0.068 R)
• M45: 6,857,267 km (0.057 R)
• M46: 6,998,637 km (0.099 R)
• M47: 7,258,339 km (0.06 R)
• M48: 7,402,402 km (0.112 R)
• M49: 7,507,868 km (0.105 R)
• M50: 7,600,619 km (0.107 R)
• M51: 7,720,297 km (0.083 R)
• M52: 7,988,676 km (0.09 R)
• M53: 8,137,526 km (0.098 R)
• M54: 8,424,305 km (0.082 R)
• M55: 8,784,088 km (0.064 R)
• M56: 9,064,285 km (0.044 R)
• M57: 9,134,745 km (0.079 R)
• M58: 9,447,255 km (0.031 R)
• M59: 9,590,420 km (0.056 R)
• M60: 9,705,461 km (0.1 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 454.1

Radius: 8.8

Gravity: 5.86 G

Time & Orbit

Eccentricity (e): 0.214

Orbit Range: 0.86 AU - 1.34 AU

Year: 811 Days

Day: 10 Hours

Environment

Temp: -186 °C

Axial Tilt: 32.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 27,940,383 km

• M1: 113,096 km (0.116 R)
• M2: 178,321 km (0.115 R)
• M3: 294,109 km (0.109 R)
• M4: 360,980 km (0.102 R)
• M5: 418,425 km (0.103 R)
• M6: 566,976 km (0.116 R)
• M7: 738,864 km (0.107 R)
• M8: 805,136 km (0.114 R)
• M9: 900,729 km (0.034 R)
• M10: 1,028,635 km (0.086 R)
• M11: 1,168,659 km (0.082 R)
• M12: 1,228,947 km (0.104 R)
• M13: 1,302,698 km (0.047 R)
• M14: 1,416,393 km (0.096 R)
• M15: 1,474,437 km (0.06 R)
• M16: 1,593,068 km (0.055 R)
• M17: 1,653,655 km (0.117 R)
• M18: 1,777,223 km (0.111 R)
• M19: 1,847,085 km (0.106 R)
• M20: 1,961,078 km (0.115 R)
• M21: 2,026,154 km (0.1 R)
• M22: 2,106,787 km (0.101 R)
• M23: 2,226,016 km (0.108 R)
• M24: 2,286,454 km (0.101 R)
• M25: 2,440,240 km (0.065 R)
• M26: 2,502,623 km (0.026 R)
• M27: 2,565,603 km (0.1 R)
• M28: 2,669,125 km (0.099 R)
• M29: 2,741,531 km (0.11 R)
• M30: 2,830,990 km (0.11 R)
• M31: 3,071,693 km (0.081 R)
• M32: 3,164,743 km (0.071 R)
• M33: 3,336,332 km (0.108 R)
• M34: 3,617,426 km (0.109 R)
• M35: 3,697,760 km (0.09 R)
• M36: 3,787,968 km (0.084 R)
• M37: 4,081,180 km (0.071 R)
• M38: 4,155,530 km (0.076 R)
• M39: 4,258,752 km (0.069 R)
• M40: 4,486,739 km (0.103 R)
• M41: 4,650,699 km (0.044 R)
• M42: 4,925,061 km (0.045 R)
• M43: 5,134,349 km (0.065 R)
• M44: 5,255,373 km (0.052 R)
• M45: 5,561,750 km (0.057 R)
• M46: 5,779,714 km (0.119 R)
• M47: 6,117,356 km (0.116 R)
• M48: 6,192,155 km (0.118 R)
• M49: 6,299,417 km (0.077 R)
• M50: 6,418,197 km (0.077 R)
• M51: 6,504,964 km (0.077 R)
• M52: 6,581,259 km (0.115 R)
• M53: 6,701,685 km (0.102 R)
• M54: 6,800,869 km (0.07 R)
• M55: 6,889,431 km (0.036 R)
• M56: 6,944,932 km (0.068 R)
• M57: 7,034,092 km (0.114 R)
• M58: 7,191,020 km (0.096 R)
• M59: 7,292,597 km (0.104 R)
• M60: 7,439,951 km (0.093 R)
• M61: 7,519,836 km (0.095 R)
• M62: 7,668,836 km (0.097 R)
• M63: 7,726,431 km (0.091 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 602.6

Radius: 14.7

Gravity: 2.79 G

Time & Orbit

Eccentricity (e): 0.173

Orbit Range: 0.93 AU - 1.33 AU

Year: 844 Days

Day: 8.9 Hours

Environment

Temp: -178 °C

Axial Tilt: 31.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (45)

Outer Limit: 27,940,383 km

• M1: 184,305 km (0.11 R)
• M2: 291,417 km (0.078 R)
• M3: 389,852 km (0.103 R)
• M4: 520,451 km (0.111 R)
• M5: 641,176 km (0.077 R)
• M6: 747,241 km (0.074 R)
• M7: 1,015,919 km (0.072 R)
• M8: 1,175,241 km (0.082 R)
• M9: 1,291,030 km (0.098 R)
• M10: 1,424,471 km (0.103 R)
• M11: 1,633,758 km (0.108 R)
• M12: 1,876,406 km (0.059 R)
• M13: 1,998,328 km (0.059 R)
• M14: 2,340,010 km (0.066 R)
• M15: 2,572,784 km (0.052 R)
• M16: 2,726,571 km (0.098 R)
• M17: 2,892,475 km (0.102 R)
• M18: 3,025,767 km (0.071 R)
• M19: 3,143,051 km (0.118 R)
• M20: 3,570,303 km (0.1 R)
• M21: 3,723,491 km (0.109 R)
• M22: 3,830,005 km (0.034 R)
• M23: 3,967,186 km (0.059 R)
• M24: 4,166,002 km (0.081 R)
• M25: 4,286,877 km (0.065 R)
• M26: 4,388,454 km (0.108 R)
• M27: 4,667,154 km (0.097 R)
• M28: 4,835,003 km (0.12 R)
• M29: 5,166,063 km (0.101 R)
• M30: 5,263,601 km (0.093 R)
• M31: 5,416,640 km (0.06 R)
• M32: 5,571,025 km (0.108 R)
• M33: 5,738,126 km (0.075 R)
• M34: 5,873,212 km (0.049 R)
• M35: 5,975,089 km (0.101 R)
• M36: 6,377,058 km (0.077 R)
• M37: 6,575,574 km (0.055 R)
• M38: 7,304,714 km (0.091 R)
• M39: 7,524,773 km (0.062 R)
• M40: 7,635,775 km (0.092 R)
• M41: 7,834,291 km (0.055 R)
• M42: 7,971,771 km (0.104 R)
• M43: 8,084,867 km (0.116 R)
• M44: 8,452,878 km (0.086 R)
• M45: 8,787,678 km (0.086 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.39 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 211.9

Radius: 14.2

Gravity: 1.05 G

Time & Orbit

Eccentricity (e): 0.164

Orbit Range: 2 AU - 2.78 AU

Year: 2597 Days

Day: 8.6 Hours

Environment

Temp: -201 °C

Axial Tilt: 27.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (52)

Outer Limit: 27,940,383 km

• M1: 182,659 km (0.097 R)
• M2: 273,016 km (0.079 R)
• M3: 387,458 km (0.071 R)
• M4: 504,893 km (0.104 R)
• M5: 594,502 km (0.103 R)
• M6: 844,031 km (0.027 R)
• M7: 1,187,508 km (0.074 R)
• M8: 1,678,787 km (0.063 R)
• M9: 1,774,829 km (0.08 R)
• M10: 2,230,953 km (0.066 R)
• M11: 2,358,859 km (0.073 R)
• M12: 2,577,721 km (0.069 R)
• M13: 2,700,990 km (0.079 R)
• M14: 2,849,391 km (0.059 R)
• M15: 3,083,063 km (0.091 R)
• M16: 3,262,580 km (0.05 R)
• M17: 3,384,203 km (0.086 R)
• M18: 3,557,138 km (0.028 R)
• M19: 3,860,523 km (0.116 R)
• M20: 3,976,611 km (0.046 R)
• M21: 4,146,255 km (0.107 R)
• M22: 4,385,162 km (0.047 R)
• M23: 4,479,259 km (0.09 R)
• M24: 4,574,104 km (0.111 R)
• M25: 4,988,491 km (0.034 R)
• M26: 5,400,483 km (0.086 R)
• M27: 5,705,962 km (0.089 R)
• M28: 5,853,316 km (0.104 R)
• M29: 6,318,565 km (0.112 R)
• M30: 6,409,970 km (0.111 R)
• M31: 6,563,457 km (0.114 R)
• M32: 6,764,666 km (0.037 R)
• M33: 6,889,580 km (0.093 R)
• M34: 7,030,950 km (0.09 R)
• M35: 7,237,096 km (0.104 R)
• M36: 7,817,985 km (0.117 R)
• M37: 8,247,031 km (0.088 R)
• M38: 8,939,370 km (0.025 R)
• M39: 9,076,701 km (0.04 R)
• M40: 9,318,601 km (0.099 R)
• M41: 9,597,751 km (0.07 R)
• M42: 10,021,561 km (0.081 R)
• M43: 10,614,567 km (0.081 R)
• M44: 10,851,231 km (0.104 R)
• M45: 11,163,592 km (0.099 R)
• M46: 11,330,094 km (0.104 R)
• M47: 11,928,785 km (0.107 R)
• M48: 12,232,019 km (0.084 R)
• M49: 12,327,313 km (0.096 R)
• M50: 12,480,352 km (0.104 R)
• M51: 12,865,716 km (0.026 R)
• M52: 13,079,192 km (0.12 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.79 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 82.1

Radius: 11

Gravity: 0.68 G

Time & Orbit

Eccentricity (e): 0.08

Orbit Range: 2.57 AU - 3.01 AU

Year: 3276 Days

Day: 13.7 Hours

Environment

Temp: -217 °C

Axial Tilt: 13.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (49)

Outer Limit: 27,940,383 km

• M1: 272,119 km (0.077 R)
• M2: 383,120 km (0.114 R)
• M3: 762,052 km (0.09 R)
• M4: 880,383 km (0.096 R)
• M5: 1,041,052 km (0.094 R)
• M6: 1,166,415 km (0.108 R)
• M7: 1,250,489 km (0.082 R)
• M8: 1,590,525 km (0.104 R)
• M9: 1,667,268 km (0.112 R)
• M10: 1,878,201 km (0.07 R)
• M11: 2,051,585 km (0.113 R)
• M12: 2,249,354 km (0.076 R)
• M13: 2,922,245 km (0.053 R)
• M14: 3,070,496 km (0.115 R)
• M15: 3,452,120 km (0.032 R)
• M16: 3,575,240 km (0.077 R)
• M17: 3,734,112 km (0.061 R)
• M18: 3,860,672 km (0.111 R)
• M19: 3,965,241 km (0.071 R)
• M20: 4,141,617 km (0.084 R)
• M21: 4,284,633 km (0.077 R)
• M22: 4,429,294 km (0.088 R)
• M23: 4,600,135 km (0.098 R)
• M24: 4,986,396 km (0.103 R)
• M25: 5,189,849 km (0.084 R)
• M26: 5,422,025 km (0.025 R)
• M27: 5,684,121 km (0.079 R)
• M28: 5,856,757 km (0.102 R)
• M29: 6,302,558 km (0.052 R)
• M30: 6,398,600 km (0.048 R)
• M31: 7,313,541 km (0.061 R)
• M32: 7,457,903 km (0.104 R)
• M33: 7,690,827 km (0.063 R)
• M34: 7,837,732 km (0.069 R)
• M35: 8,104,465 km (0.041 R)
• M36: 8,253,913 km (0.117 R)
• M37: 8,404,408 km (0.083 R)
• M38: 8,510,174 km (0.049 R)
• M39: 8,662,166 km (0.074 R)
• M40: 8,784,387 km (0.063 R)
• M41: 9,451,294 km (0.074 R)
• M42: 10,022,010 km (0.115 R)
• M43: 10,214,842 km (0.111 R)
• M44: 10,538,871 km (0.091 R)
• M45: 10,702,232 km (0.078 R)
• M46: 10,816,973 km (0.108 R)
• M47: 10,965,225 km (0.066 R)
• M48: 11,114,075 km (0.089 R)
• M49: 11,213,707 km (0.105 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4.67 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 269.6

Radius: 14.2

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.245

Orbit Range: 3.53 AU - 5.81 AU

Year: 7094 Days

Day: 5.8 Hours

Environment

Temp: -215 °C

Axial Tilt: 31.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 27,940,383 km

• M1: 390,450 km (0.107 R)
• M2: 496,366 km (0.065 R)
• M3: 626,067 km (0.101 R)
• M4: 938,727 km (0.082 R)
• M5: 1,189,453 km (0.099 R)
• M6: 1,388,867 km (0.114 R)
• M7: 1,903,783 km (0.097 R)
• M8: 2,174,405 km (0.075 R)
• M9: 2,475,994 km (0.114 R)
• M10: 2,567,399 km (0.12 R)
• M11: 3,041,474 km (0.062 R)
• M12: 3,159,507 km (0.09 R)
• M13: 3,339,473 km (0.081 R)
• M14: 4,115,138 km (0.113 R)
• M15: 4,268,177 km (0.057 R)
• M16: 4,378,580 km (0.075 R)
• M17: 4,853,105 km (0.103 R)
• M18: 5,202,416 km (0.109 R)
• M19: 5,802,752 km (0.055 R)
• M20: 6,273,836 km (0.09 R)
• M21: 6,705,874 km (0.102 R)
• M22: 6,834,828 km (0.117 R)
• M23: 6,938,648 km (0.066 R)
• M24: 7,042,918 km (0.097 R)
• M25: 7,385,497 km (0.12 R)
• M26: 7,599,123 km (0.106 R)
• M27: 8,390,496 km (0.067 R)
• M28: 8,866,815 km (0.111 R)
• M29: 9,236,921 km (0.087 R)
• M30: 9,670,455 km (0.113 R)
• M31: 9,933,747 km (0.113 R)
• M32: 10,081,101 km (0.061 R)
• M33: 10,199,433 km (0.089 R)
• M34: 11,285,663 km (0.09 R)
• M35: 11,377,816 km (0.074 R)
• M36: 11,998,946 km (0.074 R)
• M37: 12,124,459 km (0.066 R)
• M38: 12,630,997 km (0.079 R)
• M39: 13,112,253 km (0.096 R)
• M40: 13,436,432 km (0.117 R)
• M41: 13,828,977 km (0.085 R)
• M42: 14,558,566 km (0.117 R)
• M43: 14,658,946 km (0.113 R)
• M44: 14,894,263 km (0.104 R)
• M45: 15,368,638 km (0.116 R)
• M46: 15,573,587 km (0.101 R)
• M47: 16,646,353 km (0.074 R)
• M48: 16,997,460 km (0.104 R)
• M49: 17,138,680 km (0.094 R)
• M50: 18,281,907 km (0.088 R)
• M51: 19,118,757 km (0.077 R)
• M52: 19,339,265 km (0.116 R)
• M53: 20,154,573 km (0.109 R)
• M54: 20,378,970 km (0.032 R)
• M55: 20,491,468 km (0.117 R)
• M56: 21,208,640 km (0.118 R)
• M57: 21,360,631 km (0.051 R)
• M58: 21,589,366 km (0.042 R)
• M59: 21,742,255 km (0.101 R)
• M60: 21,895,593 km (0.092 R)
• M61: 22,396,297 km (0.106 R)
• M62: 22,551,281 km (0.084 R)
• M63: 23,330,835 km (0.119 R)
• M64: 23,842,161 km (0.08 R)
• M65: 24,079,572 km (0.043 R)
• M66: 24,317,583 km (0.054 R)
• M67: 24,556,490 km (0.095 R)
• M68: 24,876,331 km (0.061 R)
• M69: 25,318,243 km (0.067 R)
• M70: 26,291,377 km (0.119 R)
• M71: 26,618,398 km (0.098 R)
• M72: 26,741,517 km (0.111 R)
• M73: 27,442,084 km (0.093 R)
• M74: 27,732,453 km (0.111 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 198 - 16,805 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit