🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.89 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.46

Radius: 1.82

Gravity: 1.35 G

Time & Orbit

Eccentricity (e): 0.031

Orbit Range: 0.86 AU - 0.92 AU

Year: 320 Days

Day: 26.3 Hours

Environment

Temp: 27 °C

Axial Tilt: 17.8 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 2 - Terrestrial

Semi-Major Axis: 2.19 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.95

Radius: 1.9

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.064

Orbit Range: 2.05 AU - 2.33 AU

Year: 1234 Days

Day: 42.1 Hours

Environment

Temp: -82 °C

Axial Tilt: 19 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 3.89 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 3 - Gas Giant

Semi-Major Axis: 5.59 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 750.3

Radius: 9

Gravity: 9.26 G

Time & Orbit

Eccentricity (e): 0.08

Orbit Range: 5.14 AU - 6.04 AU

Year: 5033 Days

Day: 11.7 Hours

Environment

Temp: -160 °C

Axial Tilt: 20.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 99,705,857 km

• M1: 114,742 km (0.06 R)
• M2: 200,012 km (0.043 R)
• M3: 361,129 km (0.047 R)
• M4: 524,789 km (0.119 R)
• M5: 701,315 km (0.047 R)
• M6: 764,595 km (0.104 R)
• M7: 1,053,019 km (0.102 R)
• M8: 1,605,784 km (0.109 R)
• M9: 1,814,173 km (0.113 R)
• M10: 2,712,209 km (0.079 R)
• M11: 2,898,160 km (0.111 R)
• M12: 2,960,991 km (0.119 R)
• M13: 3,024,420 km (0.118 R)
• M14: 3,152,626 km (0.11 R)
• M15: 3,866,357 km (0.088 R)
• M16: 4,005,782 km (0.073 R)
• M17: 4,579,640 km (0.091 R)
• M18: 4,926,407 km (0.037 R)
• M19: 5,077,651 km (0.071 R)
• M20: 5,230,540 km (0.084 R)
• M21: 5,359,045 km (0.102 R)
• M22: 5,830,278 km (0.114 R)
• M23: 6,151,913 km (0.075 R)
• M24: 6,260,372 km (0.1 R)
• M25: 6,728,613 km (0.084 R)
• M26: 6,952,860 km (0.066 R)
• M27: 7,179,651 km (0.101 R)
• M28: 7,962,945 km (0.086 R)
• M29: 8,470,082 km (0.085 R)
• M30: 8,742,649 km (0.032 R)
• M31: 8,926,056 km (0.113 R)
• M32: 9,609,569 km (0.049 R)
• M33: 9,703,965 km (0.074 R)
• M34: 10,245,360 km (0.111 R)
• M35: 10,342,000 km (0.051 R)
• M36: 10,471,253 km (0.095 R)
• M37: 11,257,689 km (0.065 R)
• M38: 11,357,470 km (0.086 R)
• M39: 11,490,762 km (0.069 R)
• M40: 11,792,651 km (0.057 R)
• M41: 12,029,314 km (0.099 R)
• M42: 12,097,232 km (0.09 R)
• M43: 12,335,990 km (0.085 R)
• M44: 12,576,244 km (0.082 R)
• M45: 13,517,364 km (0.116 R)
• M46: 14,085,687 km (0.106 R)
• M47: 14,480,924 km (0.082 R)
• M48: 14,770,695 km (0.066 R)
• M49: 15,282,470 km (0.08 R)
• M50: 15,503,575 km (0.118 R)
• M51: 15,800,078 km (0.119 R)
• M52: 16,098,376 km (0.108 R)
• M53: 16,285,823 km (0.041 R)
• M54: 17,080,935 km (0.12 R)
• M55: 17,272,121 km (0.066 R)
• M56: 17,502,352 km (0.099 R)
• M57: 17,695,184 km (0.098 R)
• M58: 19,262,222 km (0.073 R)
• M59: 19,500,980 km (0.12 R)
• M60: 19,700,843 km (0.101 R)
• M61: 20,506,876 km (0.069 R)
• M62: 21,241,551 km (0.108 R)
• M63: 22,443,271 km (0.053 R)
• M64: 22,904,930 km (0.113 R)
• M65: 23,454,403 km (0.079 R)
• M66: 23,922,794 km (0.095 R)
• M67: 24,008,364 km (0.112 R)
• M68: 24,523,429 km (0.106 R)
• M69: 24,782,383 km (0.054 R)
• M70: 25,259,451 km (0.051 R)
• M71: 25,914,839 km (0.085 R)
• M72: 26,002,653 km (0.12 R)
• M73: 26,266,693 km (0.118 R)
• M74: 26,753,186 km (0.091 R)
• M75: 27,108,780 km (0.047 R)
• M76: 27,600,209 km (0.084 R)
• M77: 28,501,536 km (0.054 R)
• M78: 28,637,520 km (0.115 R)
• M79: 29,641,472 km (0.107 R)
• M80: 29,825,327 km (0.065 R)
• M81: 30,517,966 km (0.109 R)
• M82: 30,703,467 km (0.101 R)

Planet 4 - Gas Giant

Semi-Major Axis: 6.76 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 305.3

Radius: 12.9

Gravity: 1.83 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 5.96 AU - 7.56 AU

Year: 6693 Days

Day: 8.9 Hours

Environment

Temp: -167 °C

Axial Tilt: 36.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 99,705,857 km

• M1: 173,384 km (0.115 R)
• M2: 374,892 km (0.057 R)
• M3: 622,028 km (0.093 R)
• M4: 732,581 km (0.026 R)
• M5: 887,564 km (0.056 R)
• M6: 1,028,037 km (0.106 R)
• M7: 1,135,298 km (0.118 R)
• M8: 1,232,537 km (0.082 R)
• M9: 1,318,256 km (0.047 R)
• M10: 1,435,990 km (0.054 R)
• M11: 1,619,547 km (0.115 R)
• M12: 2,027,350 km (0.089 R)
• M13: 2,430,965 km (0.113 R)
• M14: 3,313,443 km (0.116 R)
• M15: 3,663,203 km (0.042 R)
• M16: 3,938,762 km (0.103 R)
• M17: 4,243,344 km (0.118 R)
• M18: 4,353,896 km (0.108 R)
• M19: 4,760,354 km (0.083 R)
• M20: 5,038,157 km (0.117 R)
• M21: 5,249,988 km (0.051 R)
• M22: 5,345,132 km (0.078 R)
• M23: 5,440,875 km (0.065 R)
• M24: 5,537,066 km (0.116 R)
• M25: 6,403,986 km (0.089 R)
• M26: 6,659,499 km (0.115 R)
• M27: 6,762,721 km (0.066 R)
• M28: 7,419,606 km (0.077 R)
• M29: 7,905,200 km (0.109 R)
• M30: 8,179,563 km (0.105 R)
• M31: 8,709,438 km (0.029 R)
• M32: 8,822,385 km (0.091 R)
• M33: 9,049,774 km (0.054 R)
• M34: 9,714,587 km (0.102 R)
• M35: 10,365,188 km (0.107 R)
• M36: 11,398,311 km (0.108 R)
• M37: 11,522,028 km (0.099 R)
• M38: 11,864,607 km (0.108 R)
• M39: 12,084,366 km (0.11 R)
• M40: 12,242,043 km (0.11 R)
• M41: 12,815,900 km (0.096 R)
• M42: 13,365,822 km (0.075 R)
• M43: 13,660,081 km (0.118 R)
• M44: 13,791,577 km (0.067 R)
• M45: 14,088,978 km (0.092 R)
• M46: 14,960,086 km (0.06 R)
• M47: 15,368,040 km (0.079 R)
• M48: 15,504,772 km (0.101 R)
• M49: 15,917,662 km (0.116 R)
• M50: 16,090,747 km (0.079 R)
• M51: 16,438,861 km (0.116 R)
• M52: 16,754,214 km (0.115 R)
• M53: 17,106,965 km (0.11 R)
• M54: 17,533,618 km (0.084 R)
• M55: 17,927,809 km (0.097 R)
• M56: 18,216,234 km (0.033 R)
• M57: 18,506,304 km (0.092 R)
• M58: 19,164,534 km (0.095 R)
• M59: 19,422,591 km (0.113 R)
• M60: 20,091,443 km (0.115 R)
• M61: 21,719,816 km (0.053 R)
• M62: 22,297,862 km (0.105 R)
• M63: 22,414,099 km (0.088 R)
• M64: 22,608,128 km (0.078 R)
• M65: 23,705,578 km (0.115 R)
• M66: 25,021,291 km (0.088 R)
• M67: 25,182,258 km (0.071 R)
• M68: 25,870,857 km (0.108 R)
• M69: 26,401,481 km (0.097 R)
• M70: 26,483,461 km (0.084 R)
• M71: 26,647,570 km (0.113 R)
• M72: 26,812,127 km (0.041 R)
• M73: 27,806,355 km (0.109 R)

Planet 5 - Gas Giant

Semi-Major Axis: 7.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 719.1

Radius: 9.7

Gravity: 7.64 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 6.44 AU - 8.98 AU

Year: 8152 Days

Day: 7 Hours

Environment

Temp: -174 °C

Axial Tilt: 177.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 99,705,857 km

• M1: 127,607 km (0.096 R)
• M2: 398,230 km (0.085 R)
• M3: 623,374 km (0.065 R)
• M4: 956,678 km (0.084 R)
• M5: 1,026,391 km (0.094 R)
• M6: 1,134,251 km (0.119 R)
• M7: 1,208,452 km (0.12 R)
• M8: 1,795,474 km (0.108 R)
• M9: 1,927,120 km (0.042 R)
• M10: 2,153,611 km (0.104 R)
• M11: 2,341,207 km (0.081 R)
• M12: 2,437,099 km (0.113 R)
• M13: 2,682,589 km (0.116 R)
• M14: 2,884,696 km (0.059 R)
• M15: 3,331,096 km (0.111 R)
• M16: 3,631,488 km (0.099 R)
• M17: 4,405,807 km (0.072 R)
• M18: 4,735,820 km (0.116 R)
• M19: 4,888,410 km (0.095 R)
• M20: 5,011,678 km (0.096 R)
• M21: 5,708,356 km (0.097 R)
• M22: 5,773,131 km (0.086 R)
• M23: 6,134,261 km (0.052 R)
• M24: 6,468,911 km (0.1 R)
• M25: 6,638,555 km (0.071 R)
• M26: 7,156,164 km (0.089 R)
• M27: 7,366,798 km (0.1 R)
• M28: 7,543,921 km (0.074 R)
• M29: 8,156,973 km (0.108 R)
• M30: 8,973,778 km (0.057 R)
• M31: 9,201,167 km (0.113 R)
• M32: 9,353,756 km (0.118 R)
• M33: 9,584,287 km (0.092 R)
• M34: 12,199,258 km (0.105 R)
• M35: 13,998,621 km (0.099 R)
• M36: 14,130,267 km (0.11 R)
• M37: 14,394,906 km (0.109 R)
• M38: 14,616,610 km (0.117 R)
• M39: 15,198,545 km (0.111 R)
• M40: 16,200,402 km (0.11 R)
• M41: 16,523,683 km (0.076 R)
• M42: 16,942,557 km (0.12 R)
• M43: 17,695,633 km (0.119 R)
• M44: 18,124,081 km (0.099 R)
• M45: 18,411,608 km (0.119 R)
• M46: 18,555,970 km (0.104 R)
• M47: 18,845,891 km (0.058 R)
• M48: 20,416,669 km (0.102 R)
• M49: 21,520,850 km (0.078 R)
• M50: 21,622,128 km (0.116 R)
• M51: 21,825,282 km (0.092 R)
• M52: 22,387,321 km (0.117 R)
• M53: 23,213,251 km (0.118 R)
• M54: 24,101,713 km (0.111 R)
• M55: 24,259,688 km (0.117 R)
• M56: 25,642,870 km (0.119 R)
• M57: 25,750,281 km (0.077 R)
• M58: 26,942,277 km (0.035 R)
• M59: 27,875,618 km (0.082 R)
• M60: 28,096,724 km (0.102 R)
• M61: 28,652,181 km (0.05 R)
• M62: 29,043,230 km (0.08 R)
• M63: 30,113,303 km (0.116 R)
• M64: 30,738,772 km (0.08 R)
• M65: 31,540,916 km (0.077 R)
• M66: 32,002,425 km (0.086 R)
• M67: 33,811,662 km (0.08 R)
• M68: 34,106,669 km (0.098 R)
• M69: 34,936,937 km (0.046 R)
• M70: 36,315,631 km (0.119 R)
• M71: 37,406,798 km (0.057 R)
• M72: 37,895,235 km (0.112 R)
• M73: 38,755,124 km (0.07 R)
• M74: 39,187,611 km (0.114 R)
• M75: 39,249,395 km (0.077 R)
• M76: 39,683,678 km (0.117 R)
• M77: 39,807,993 km (0.081 R)
• M78: 40,119,456 km (0.111 R)
• M79: 41,436,217 km (0.081 R)
• M80: 41,688,738 km (0.066 R)
• M81: 41,751,868 km (0.084 R)

Planet 6 - Ice Giant

Semi-Major Axis: 13.98 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 915.2

Radius: 7.8

Gravity: 15.04 G

Time & Orbit

Eccentricity (e): 0.211

Orbit Range: 11.03 AU - 16.93 AU

Year: 19905 Days

Day: 16.1 Hours

Environment

Temp: -188 °C

Axial Tilt: 46.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 99,705,857 km

• M1: 99,632 km (0.112 R)
• M2: 193,280 km (0.112 R)
• M3: 298,448 km (0.112 R)
• M4: 509,082 km (0.116 R)
• M5: 597,195 km (0.082 R)
• M6: 841,039 km (0.034 R)
• M7: 893,548 km (0.084 R)
• M8: 1,143,975 km (0.098 R)
• M9: 1,292,825 km (0.034 R)
• M10: 1,742,666 km (0.118 R)
• M11: 2,056,223 km (0.055 R)
• M12: 2,238,134 km (0.055 R)
• M13: 2,387,582 km (0.106 R)
• M14: 2,855,225 km (0.091 R)
• M15: 3,099,668 km (0.115 R)
• M16: 3,224,582 km (0.048 R)
• M17: 3,565,516 km (0.096 R)
• M18: 4,008,026 km (0.098 R)
• M19: 4,144,160 km (0.069 R)
• M20: 4,328,166 km (0.052 R)
• M21: 4,944,509 km (0.077 R)
• M22: 5,437,135 km (0.084 R)
• M23: 5,638,643 km (0.109 R)
• M24: 7,171,722 km (0.118 R)
• M25: 7,448,478 km (0.115 R)
• M26: 7,504,278 km (0.092 R)
• M27: 8,648,552 km (0.09 R)
• M28: 9,602,538 km (0.031 R)
• M29: 10,968,217 km (0.069 R)
• M30: 11,415,365 km (0.029 R)
• M31: 12,592,401 km (0.089 R)
• M32: 12,859,134 km (0.115 R)
• M33: 12,926,154 km (0.095 R)
• M34: 13,330,517 km (0.097 R)
• M35: 14,708,463 km (0.106 R)
• M36: 14,848,636 km (0.086 R)
• M37: 15,201,238 km (0.086 R)
• M38: 17,078,991 km (0.05 R)
• M39: 17,300,395 km (0.071 R)
• M40: 18,421,332 km (0.089 R)
• M41: 18,496,879 km (0.086 R)
• M42: 18,800,114 km (0.093 R)
• M43: 19,028,700 km (0.113 R)
• M44: 19,105,144 km (0.107 R)
• M45: 19,874,676 km (0.054 R)
• M46: 21,047,822 km (0.079 R)
• M47: 25,537,404 km (0.063 R)
• M48: 28,279,981 km (0.061 R)
• M49: 28,629,442 km (0.111 R)
• M50: 31,204,919 km (0.084 R)
• M51: 31,746,912 km (0.052 R)
• M52: 32,657,215 km (0.113 R)
• M53: 32,748,769 km (0.103 R)
• M54: 33,853,400 km (0.106 R)
• M55: 38,007,284 km (0.046 R)
• M56: 39,264,953 km (0.076 R)
• M57: 40,437,950 km (0.106 R)
• M58: 40,536,236 km (0.086 R)
• M59: 40,733,107 km (0.026 R)
• M60: 41,226,331 km (0.105 R)
• M61: 41,424,249 km (0.102 R)
• M62: 41,721,799 km (0.065 R)
• M63: 42,019,948 km (0.109 R)
• M64: 42,518,408 km (0.032 R)
• M65: 43,521,162 km (0.066 R)
• M66: 44,531,845 km (0.102 R)
• M67: 45,243,931 km (0.078 R)
• M68: 48,442,184 km (0.082 R)
• M69: 49,174,316 km (0.112 R)
• M70: 49,804,871 km (0.082 R)
• M71: 50,121,121 km (0.066 R)
• M72: 51,499,366 km (0.064 R)
• M73: 52,997,589 km (0.051 R)
• M74: 53,860,021 km (0.117 R)
• M75: 54,727,090 km (0.115 R)
• M76: 56,805,004 km (0.064 R)
• M77: 57,245,720 km (0.096 R)
• M78: 58,797,349 km (0.094 R)
• M79: 59,466,500 km (0.032 R)
• M80: 61,263,170 km (0.069 R)
• M81: 62,849,955 km (0.091 R)
• M82: 63,077,643 km (0.095 R)
• M83: 63,877,094 km (0.061 R)
• M84: 69,330,535 km (0.065 R)
• M85: 69,801,469 km (0.077 R)
• M86: 73,127,927 km (0.11 R)
• M87: 77,968,914 km (0.061 R)
• M88: 78,581,218 km (0.107 R)
• M89: 81,170,458 km (0.094 R)
• M90: 81,418,492 km (0.078 R)
• M91: 82,164,237 km (0.097 R)

Planet 7 - Ice Giant

Semi-Major Axis: 18.72 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 648.1

Radius: 3.2

Gravity: 63.29 G

Time & Orbit

Eccentricity (e): 0.1

Orbit Range: 16.85 AU - 20.59 AU

Year: 30843 Days

Day: 15.4 Hours

Environment

Temp: -196 °C

Axial Tilt: 24.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 99,705,857 km

• M1: 56,099 km (0.116 R)
• M2: 111,151 km (0.119 R)
• M3: 749,186 km (0.111 R)
• M4: 1,154,148 km (0.115 R)
• M5: 1,541,307 km (0.071 R)
• M6: 2,169,319 km (0.086 R)
• M7: 2,210,907 km (0.093 R)
• M8: 2,252,794 km (0.107 R)
• M9: 2,820,967 km (0.055 R)
• M10: 3,876,081 km (0.085 R)
• M11: 4,444,403 km (0.089 R)
• M12: 4,657,580 km (0.092 R)
• M13: 5,149,159 km (0.118 R)
• M14: 5,372,957 km (0.077 R)
• M15: 5,772,084 km (0.118 R)
• M16: 6,239,877 km (0.116 R)
• M17: 6,358,657 km (0.077 R)
• M18: 6,659,050 km (0.053 R)
• M19: 7,651,033 km (0.064 R)
• M20: 9,021,200 km (0.108 R)
• M21: 11,904,849 km (0.107 R)
• M22: 12,052,203 km (0.079 R)
• M23: 12,423,355 km (0.112 R)
• M24: 14,334,468 km (0.115 R)
• M25: 14,569,785 km (0.102 R)
• M26: 14,885,736 km (0.12 R)
• M27: 15,283,666 km (0.082 R)
• M28: 15,765,970 km (0.052 R)
• M29: 17,576,254 km (0.112 R)
• M30: 17,912,400 km (0.118 R)
• M31: 18,335,613 km (0.106 R)
• M32: 26,013,723 km (0.102 R)
• M33: 28,437,209 km (0.068 R)
• M34: 28,732,814 km (0.093 R)
• M35: 29,227,834 km (0.108 R)
• M36: 29,825,477 km (0.098 R)
• M37: 30,729,647 km (0.102 R)
• M38: 35,277,123 km (0.09 R)
• M39: 35,913,213 km (0.116 R)
• M40: 36,767,417 km (0.097 R)
• M41: 38,386,814 km (0.063 R)
• M42: 38,822,443 km (0.107 R)
• M43: 40,139,652 km (0.082 R)
• M44: 40,692,715 km (0.059 R)
• M45: 41,582,823 km (0.057 R)
• M46: 41,806,471 km (0.112 R)
• M47: 42,817,304 km (0.077 R)
• M48: 44,977,797 km (0.053 R)
• M49: 45,667,293 km (0.101 R)
• M50: 46,244,591 km (0.112 R)
• M51: 47,406,518 km (0.073 R)
• M52: 47,523,204 km (0.059 R)
• M53: 49,640,313 km (0.093 R)
• M54: 50,233,918 km (0.049 R)
• M55: 50,949,295 km (0.101 R)
• M56: 51,308,180 km (0.111 R)
• M57: 51,428,008 km (0.089 R)
• M58: 52,028,643 km (0.046 R)
• M59: 52,752,398 km (0.115 R)
• M60: 52,873,273 km (0.099 R)
• M61: 53,722,540 km (0.059 R)
• M62: 54,331,852 km (0.077 R)
• M63: 57,288,355 km (0.051 R)
• M64: 57,536,987 km (0.075 R)
• M65: 58,911,492 km (0.12 R)
• M66: 59,037,004 km (0.107 R)
• M67: 59,162,517 km (0.117 R)
• M68: 60,929,866 km (0.046 R)
• M69: 61,437,901 km (0.107 R)
• M70: 62,970,681 km (0.086 R)
• M71: 63,741,858 km (0.04 R)
• M72: 64,386,774 km (0.117 R)
• M73: 66,857,383 km (0.076 R)
• M74: 67,119,179 km (0.111 R)
• M75: 67,381,424 km (0.088 R)
• M76: 68,433,546 km (0.059 R)
• M77: 68,565,491 km (0.058 R)
• M78: 69,226,265 km (0.103 R)
• M79: 72,965,613 km (0.096 R)
• M80: 73,640,300 km (0.092 R)
• M81: 73,775,387 km (0.112 R)
• M82: 75,267,775 km (0.109 R)
• M83: 77,044,250 km (0.103 R)
• M84: 77,868,684 km (0.108 R)
• M85: 80,499,063 km (0.078 R)
• M86: 80,638,339 km (0.109 R)
• M87: 83,299,086 km (0.087 R)
• M88: 85,419,935 km (0.114 R)
• M89: 87,415,421 km (0.051 R)
• M90: 87,701,752 km (0.083 R)
• M91: 88,131,846 km (0.099 R)
• M92: 88,562,687 km (0.11 R)
• M93: 89,138,041 km (0.093 R)
• M94: 91,888,398 km (0.107 R)
• M95: 93,786,047 km (0.117 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 448 - 18,493 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit