🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.62 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.75

Radius: 1.7

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.191

Orbit Range: 0.5 AU - 0.74 AU

Year: 186 Days

Day: 31.4 Hours

Environment

Temp: 155 °C

Axial Tilt: 35.4 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 109,142,554 km

• M1: 65,823 km (0.12 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.74 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.15

Radius: 0.47

Gravity: 0.68 G

Time & Orbit

Eccentricity (e): 0.236

Orbit Range: 0.57 AU - 0.91 AU

Year: 242 Days

Day: 22.7 Hours

Environment

Temp: 148 °C

Axial Tilt: 38.8 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (2)

Outer Limit: 109,142,554 km

• M1: 51,013 km (0.118 R)
• M2: 107,561 km (0.114 R)

Planet 3 - Terrestrial

Semi-Major Axis: 0.75 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.13

Radius: 1.58

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.229

Orbit Range: 0.58 AU - 0.92 AU

Year: 247 Days

Day: 15.5 Hours

Environment

Temp: 176 °C

Axial Tilt: 2.9 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 4 - Terrestrial

Semi-Major Axis: 2 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.62

Radius: 1.84

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 1.87 AU - 2.13 AU

Year: 1077 Days

Day: 43.2 Hours

Environment

Temp: -74 °C

Axial Tilt: 14.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 3.33 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.39

Radius: 0.69

Gravity: 0.82 G

Time & Orbit

Eccentricity (e): 0.216

Orbit Range: 2.61 AU - 4.05 AU

Year: 2314 Days

Day: 29.2 Hours

Environment

Temp: -118 °C

Axial Tilt: 19.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 109,142,554 km

• M1: 473,776 km (0.074 R)

Asteroid Belt

Center: 4.08 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 6 - Gas Giant

Semi-Major Axis: 4.82 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 403.9

Radius: 14.2

Gravity: 2 G

Time & Orbit

Eccentricity (e): 0.027

Orbit Range: 4.69 AU - 4.95 AU

Year: 4030 Days

Day: 9.7 Hours

Environment

Temp: -144 °C

Axial Tilt: 0.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 109,142,554 km

• M1: 184,305 km (0.117 R)
• M2: 319,092 km (0.111 R)
• M3: 480,359 km (0.057 R)
• M4: 650,452 km (0.111 R)
• M5: 783,594 km (0.082 R)
• M6: 1,103,434 km (0.026 R)
• M7: 1,402,480 km (0.091 R)
• M8: 1,674,449 km (0.118 R)
• M9: 2,299,768 km (0.114 R)
• M10: 2,390,574 km (0.071 R)
• M11: 3,330,497 km (0.106 R)
• M12: 3,715,114 km (0.085 R)
• M13: 4,003,837 km (0.107 R)
• M14: 4,394,138 km (0.117 R)
• M15: 4,622,724 km (0.061 R)
• M16: 5,433,694 km (0.094 R)
• M17: 5,556,065 km (0.046 R)
• M18: 5,679,334 km (0.1 R)
• M19: 5,845,238 km (0.084 R)
• M20: 6,181,982 km (0.064 R)
• M21: 6,568,394 km (0.113 R)
• M22: 6,918,602 km (0.119 R)
• M23: 7,207,775 km (0.092 R)
• M24: 7,432,770 km (0.059 R)
• M25: 7,936,317 km (0.08 R)
• M26: 8,450,933 km (0.086 R)
• M27: 8,688,495 km (0.107 R)
• M28: 8,976,471 km (0.056 R)
• M29: 9,121,581 km (0.12 R)
• M30: 9,291,973 km (0.035 R)
• M31: 9,984,162 km (0.115 R)
• M32: 10,311,183 km (0.108 R)
• M33: 10,872,773 km (0.054 R)
• M34: 11,549,255 km (0.081 R)
• M35: 11,760,188 km (0.091 R)
• M36: 12,373,689 km (0.111 R)
• M37: 12,806,775 km (0.095 R)
• M38: 12,943,058 km (0.049 R)
• M39: 13,052,564 km (0.065 R)
• M40: 13,604,281 km (0.075 R)
• M41: 14,023,155 km (0.048 R)
• M42: 15,334,081 km (0.057 R)
• M43: 15,974,958 km (0.076 R)
• M44: 16,151,185 km (0.108 R)
• M45: 16,773,362 km (0.087 R)
• M46: 16,862,971 km (0.104 R)
• M47: 17,162,466 km (0.062 R)
• M48: 17,919,132 km (0.092 R)
• M49: 18,347,580 km (0.076 R)
• M50: 18,903,486 km (0.078 R)
• M51: 19,339,714 km (0.073 R)
• M52: 19,622,005 km (0.095 R)
• M53: 20,924,703 km (0.091 R)
• M54: 21,279,100 km (0.108 R)
• M55: 21,928,355 km (0.102 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.38 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 639.8

Radius: 11.1

Gravity: 5.19 G

Time & Orbit

Eccentricity (e): 0.148

Orbit Range: 5.44 AU - 7.32 AU

Year: 6137 Days

Day: 14 Hours

Environment

Temp: -170 °C

Axial Tilt: 37.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 109,142,554 km

• M1: 139,126 km (0.107 R)
• M2: 596,596 km (0.092 R)
• M3: 709,393 km (0.116 R)
• M4: 830,119 km (0.111 R)
• M5: 987,944 km (0.104 R)
• M6: 1,187,657 km (0.056 R)
• M7: 1,367,474 km (0.103 R)
• M8: 1,556,416 km (0.102 R)
• M9: 1,903,184 km (0.092 R)
• M10: 1,979,329 km (0.085 R)
• M11: 2,154,658 km (0.11 R)
• M12: 2,314,877 km (0.054 R)
• M13: 2,541,817 km (0.099 R)
• M14: 2,972,958 km (0.117 R)
• M15: 3,152,027 km (0.105 R)
• M16: 3,450,624 km (0.098 R)
• M17: 3,615,182 km (0.118 R)
• M18: 4,100,029 km (0.071 R)
• M19: 4,174,529 km (0.089 R)
• M20: 4,683,012 km (0.112 R)
• M21: 4,865,671 km (0.028 R)
• M22: 5,346,179 km (0.079 R)
• M23: 5,509,839 km (0.101 R)
• M24: 5,592,268 km (0.068 R)
• M25: 6,010,543 km (0.095 R)
• M26: 6,180,786 km (0.059 R)
• M27: 6,323,801 km (0.056 R)
• M28: 7,295,739 km (0.095 R)
• M29: 7,446,982 km (0.117 R)
• M30: 8,823,133 km (0.114 R)
• M31: 9,179,475 km (0.089 R)
• M32: 9,277,462 km (0.094 R)
• M33: 9,939,432 km (0.119 R)
• M34: 10,378,053 km (0.034 R)
• M35: 10,788,550 km (0.103 R)
• M36: 10,995,892 km (0.1 R)
• M37: 11,134,719 km (0.092 R)
• M38: 11,344,156 km (0.031 R)
• M39: 12,087,508 km (0.036 R)
• M40: 12,195,069 km (0.068 R)
• M41: 12,338,832 km (0.097 R)
• M42: 12,483,194 km (0.113 R)
• M43: 12,628,155 km (0.098 R)
• M44: 13,733,234 km (0.116 R)
• M45: 13,845,433 km (0.113 R)
• M46: 14,221,522 km (0.115 R)
• M47: 14,373,064 km (0.1 R)
• M48: 14,525,056 km (0.103 R)
• M49: 14,715,643 km (0.12 R)
• M50: 15,099,661 km (0.072 R)
• M51: 16,113,336 km (0.092 R)
• M52: 16,588,609 km (0.083 R)
• M53: 17,028,426 km (0.116 R)
• M54: 17,269,877 km (0.104 R)
• M55: 17,796,911 km (0.113 R)
• M56: 18,535,475 km (0.083 R)
• M57: 19,116,962 km (0.082 R)
• M58: 20,255,103 km (0.082 R)
• M59: 20,853,794 km (0.093 R)
• M60: 21,806,582 km (0.066 R)
• M61: 22,817,714 km (0.068 R)
• M62: 22,995,137 km (0.09 R)
• M63: 23,306,600 km (0.119 R)
• M64: 23,888,985 km (0.082 R)
• M65: 24,204,636 km (0.105 R)
• M66: 24,340,322 km (0.117 R)
• M67: 25,434,780 km (0.069 R)
• M68: 25,941,767 km (0.105 R)
• M69: 26,034,368 km (0.106 R)
• M70: 26,452,045 km (0.063 R)
• M71: 26,825,292 km (0.109 R)
• M72: 26,918,940 km (0.094 R)
• M73: 27,624,294 km (0.116 R)
• M74: 28,192,916 km (0.108 R)
• M75: 28,288,060 km (0.073 R)
• M76: 28,909,190 km (0.1 R)
• M77: 29,534,808 km (0.108 R)
• M78: 30,262,303 km (0.111 R)
• M79: 30,995,632 km (0.118 R)
• M80: 31,833,828 km (0.094 R)
• M81: 32,280,528 km (0.095 R)
• M82: 32,579,574 km (0.06 R)
• M83: 32,829,402 km (0.092 R)
• M84: 33,683,756 km (0.073 R)

Planet 8 - Gas Giant

Semi-Major Axis: 8.18 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 118.1

Radius: 14.8

Gravity: 0.54 G

Time & Orbit

Eccentricity (e): 0.101

Orbit Range: 7.35 AU - 9.01 AU

Year: 8909 Days

Day: 14.5 Hours

Environment

Temp: -178 °C

Axial Tilt: 35.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 109,142,554 km

• M1: 198,367 km (0.118 R)
• M2: 526,435 km (0.115 R)
• M3: 618,737 km (0.104 R)
• M4: 835,055 km (0.106 R)
• M5: 1,066,334 km (0.106 R)
• M6: 1,190,500 km (0.065 R)
• M7: 1,333,216 km (0.097 R)
• M8: 1,608,327 km (0.07 R)
• M9: 1,842,148 km (0.099 R)
• M10: 2,071,931 km (0.092 R)
• M11: 2,442,933 km (0.099 R)
• M12: 2,905,939 km (0.088 R)
• M13: 3,030,554 km (0.098 R)
• M14: 3,248,667 km (0.114 R)
• M15: 3,471,867 km (0.098 R)
• M16: 3,700,303 km (0.073 R)
• M17: 3,875,034 km (0.094 R)
• M18: 3,992,917 km (0.096 R)
• M19: 4,684,508 km (0.081 R)
• M20: 4,831,562 km (0.108 R)
• M21: 5,746,503 km (0.074 R)
• M22: 5,926,918 km (0.097 R)
• M23: 6,109,278 km (0.06 R)
• M24: 6,691,064 km (0.079 R)
• M25: 6,833,332 km (0.084 R)
• M26: 7,363,806 km (0.074 R)
• M27: 7,807,962 km (0.056 R)
• M28: 7,957,859 km (0.104 R)
• M29: 8,134,085 km (0.044 R)
• M30: 8,311,658 km (0.048 R)
• M31: 9,244,849 km (0.031 R)
• M32: 9,430,201 km (0.104 R)
• M33: 9,563,343 km (0.12 R)
• M34: 10,238,628 km (0.103 R)
• M35: 10,901,496 km (0.102 R)
• M36: 11,864,308 km (0.069 R)
• M37: 12,065,966 km (0.057 R)
• M38: 12,210,627 km (0.115 R)
• M39: 12,414,230 km (0.081 R)
• M40: 12,706,993 km (0.112 R)
• M41: 13,180,320 km (0.112 R)
• M42: 13,719,621 km (0.117 R)
• M43: 13,992,038 km (0.086 R)
• M44: 14,573,077 km (0.117 R)
• M45: 14,913,113 km (0.116 R)
• M46: 15,193,309 km (0.07 R)
• M47: 15,412,470 km (0.088 R)
• M48: 15,664,094 km (0.102 R)
• M49: 15,790,504 km (0.114 R)
• M50: 15,885,499 km (0.07 R)
• M51: 16,331,300 km (0.108 R)
• M52: 17,040,394 km (0.113 R)
• M53: 17,660,777 km (0.118 R)
• M54: 18,388,421 km (0.074 R)
• M55: 18,823,152 km (0.104 R)
• M56: 19,193,556 km (0.113 R)
• M57: 19,328,793 km (0.116 R)
• M58: 19,566,354 km (0.116 R)
• M59: 19,873,180 km (0.102 R)
• M60: 20,664,552 km (0.093 R)
• M61: 21,221,206 km (0.036 R)
• M62: 21,431,241 km (0.101 R)
• M63: 21,677,180 km (0.12 R)
• M64: 21,994,627 km (0.108 R)
• M65: 22,527,345 km (0.095 R)
• M66: 22,848,980 km (0.064 R)
• M67: 23,280,271 km (0.099 R)
• M68: 23,388,580 km (0.065 R)
• M69: 23,823,162 km (0.117 R)
• M70: 24,041,425 km (0.057 R)
• M71: 24,406,743 km (0.101 R)

Planet 9 - Gas Giant

Semi-Major Axis: 8.67 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 400.4

Radius: 12.9

Gravity: 2.41 G

Time & Orbit

Eccentricity (e): 0.061

Orbit Range: 8.14 AU - 9.2 AU

Year: 9721 Days

Day: 12.2 Hours

Environment

Temp: -180 °C

Axial Tilt: 4.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 109,142,554 km

• M1: 315,203 km (0.112 R)
• M2: 611,556 km (0.096 R)
• M3: 839,693 km (0.074 R)
• M4: 1,080,097 km (0.08 R)
• M5: 1,218,026 km (0.034 R)
• M6: 1,399,039 km (0.102 R)
• M7: 2,435,902 km (0.119 R)
• M8: 2,527,606 km (0.09 R)
• M9: 2,620,356 km (0.086 R)
• M10: 2,978,942 km (0.053 R)
• M11: 3,176,561 km (0.105 R)
• M12: 4,065,173 km (0.119 R)
• M13: 4,202,204 km (0.062 R)
• M14: 4,708,294 km (0.034 R)
• M15: 5,115,499 km (0.05 R)
• M16: 5,293,371 km (0.081 R)
• M17: 5,564,293 km (0.059 R)
• M18: 5,655,697 km (0.115 R)
• M19: 6,151,315 km (0.104 R)
• M20: 6,468,313 km (0.074 R)
• M21: 7,417,661 km (0.098 R)
• M22: 7,960,103 km (0.075 R)
• M23: 8,515,410 km (0.073 R)
• M24: 8,726,941 km (0.03 R)
• M25: 8,868,910 km (0.076 R)
• M26: 9,011,626 km (0.118 R)
• M27: 9,227,197 km (0.072 R)
• M28: 9,371,858 km (0.042 R)
• M29: 9,663,574 km (0.099 R)
• M30: 10,255,832 km (0.096 R)
• M31: 11,282,073 km (0.077 R)
• M32: 11,592,489 km (0.112 R)
• M33: 12,983,300 km (0.059 R)
• M34: 13,390,356 km (0.111 R)
• M35: 14,384,284 km (0.084 R)
• M36: 14,510,245 km (0.06 R)
• M37: 15,703,438 km (0.097 R)
• M38: 17,016,459 km (0.069 R)
• M39: 17,551,570 km (0.089 R)
• M40: 17,731,088 km (0.061 R)
• M41: 18,137,395 km (0.066 R)
• M42: 20,544,874 km (0.108 R)
• M43: 21,257,857 km (0.104 R)
• M44: 21,882,429 km (0.087 R)
• M45: 22,075,709 km (0.043 R)
• M46: 23,100,305 km (0.09 R)
• M47: 23,198,591 km (0.078 R)
• M48: 23,940,895 km (0.12 R)
• M49: 24,490,368 km (0.085 R)
• M50: 24,942,902 km (0.073 R)
• M51: 25,347,414 km (0.113 R)
• M52: 25,652,295 km (0.104 R)
• M53: 26,471,343 km (0.052 R)
• M54: 26,677,489 km (0.052 R)
• M55: 27,350,979 km (0.063 R)
• M56: 27,715,848 km (0.115 R)
• M57: 27,820,417 km (0.047 R)
• M58: 29,618,284 km (0.098 R)
• M59: 29,939,471 km (0.102 R)
• M60: 30,855,608 km (0.108 R)
• M61: 30,964,066 km (0.114 R)
• M62: 31,072,675 km (0.096 R)
• M63: 31,453,401 km (0.083 R)
• M64: 32,000,181 km (0.093 R)
• M65: 32,384,797 km (0.108 R)
• M66: 32,495,051 km (0.101 R)
• M67: 32,992,314 km (0.119 R)
• M68: 33,882,571 km (0.03 R)
• M69: 35,063,198 km (0.072 R)
• M70: 36,600,765 km (0.117 R)
• M71: 37,580,182 km (0.072 R)
• M72: 39,153,353 km (0.111 R)
• M73: 39,270,787 km (0.049 R)

Planet 10 - Ice Giant

Semi-Major Axis: 18.44 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 889.4

Radius: 5.6

Gravity: 28.36 G

Time & Orbit

Eccentricity (e): 0.032

Orbit Range: 17.85 AU - 19.03 AU

Year: 30153 Days

Day: 17.3 Hours

Environment

Temp: -199 °C

Axial Tilt: 19.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 109,142,554 km

• M1: 231,278 km (0.063 R)
• M2: 693,985 km (0.075 R)
• M3: 1,476,531 km (0.026 R)
• M4: 1,515,127 km (0.077 R)
• M5: 1,794,426 km (0.093 R)
• M6: 1,919,041 km (0.114 R)
• M7: 2,133,116 km (0.055 R)
• M8: 2,725,075 km (0.083 R)
• M9: 2,772,647 km (0.094 R)
• M10: 2,917,009 km (0.112 R)
• M11: 2,965,628 km (0.097 R)
• M12: 3,887,301 km (0.094 R)
• M13: 4,323,378 km (0.082 R)
• M14: 5,419,931 km (0.097 R)
• M15: 5,540,058 km (0.106 R)
• M16: 5,722,119 km (0.048 R)
• M17: 6,342,950 km (0.099 R)
• M18: 8,329,909 km (0.038 R)
• M19: 8,399,322 km (0.081 R)
• M20: 8,889,853 km (0.105 R)
• M21: 9,031,672 km (0.095 R)
• M22: 9,825,439 km (0.089 R)
• M23: 11,866,253 km (0.046 R)
• M24: 12,179,361 km (0.074 R)
• M25: 12,337,037 km (0.117 R)
• M26: 12,416,025 km (0.116 R)
• M27: 13,215,925 km (0.089 R)
• M28: 13,377,790 km (0.082 R)
• M29: 15,799,181 km (0.08 R)
• M30: 16,927,597 km (0.079 R)
• M31: 18,442,126 km (0.102 R)
• M32: 19,169,621 km (0.115 R)
• M33: 19,444,881 km (0.098 R)
• M34: 19,721,487 km (0.071 R)
• M35: 20,371,789 km (0.058 R)
• M36: 20,465,288 km (0.107 R)
• M37: 20,746,682 km (0.064 R)
• M38: 21,408,054 km (0.119 R)
• M39: 26,125,623 km (0.117 R)
• M40: 27,559,668 km (0.05 R)
• M41: 28,495,103 km (0.104 R)
• M42: 28,704,391 km (0.065 R)
• M43: 29,019,145 km (0.076 R)
• M44: 30,503,604 km (0.097 R)
• M45: 31,795,531 km (0.096 R)
• M46: 32,448,227 km (0.08 R)
• M47: 33,215,215 km (0.099 R)
• M48: 36,002,672 km (0.052 R)
• M49: 39,096,356 km (0.114 R)
• M50: 39,561,905 km (0.034 R)
• M51: 39,678,591 km (0.082 R)
• M52: 40,733,705 km (0.086 R)
• M53: 42,751,930 km (0.074 R)
• M54: 43,111,414 km (0.094 R)
• M55: 45,655,924 km (0.116 R)
• M56: 46,268,976 km (0.082 R)
• M57: 47,875,507 km (0.106 R)
• M58: 48,498,134 km (0.079 R)
• M59: 52,931,766 km (0.12 R)
• M60: 53,060,270 km (0.079 R)
• M61: 54,222,047 km (0.075 R)
• M62: 55,522,801 km (0.093 R)
• M63: 56,439,387 km (0.05 R)
• M64: 56,833,727 km (0.064 R)
• M65: 58,154,826 km (0.089 R)
• M66: 58,287,370 km (0.096 R)
• M67: 60,289,438 km (0.046 R)
• M68: 60,692,604 km (0.115 R)
• M69: 60,961,880 km (0.04 R)
• M70: 61,636,567 km (0.1 R)
• M71: 62,721,450 km (0.105 R)
• M72: 63,949,499 km (0.098 R)
• M73: 64,910,067 km (0.073 R)
• M74: 67,541,344 km (0.086 R)
• M75: 68,659,738 km (0.038 R)
• M76: 70,772,957 km (0.088 R)
• M77: 71,056,296 km (0.105 R)
• M78: 72,907,420 km (0.08 R)
• M79: 74,198,300 km (0.112 R)
• M80: 75,207,487 km (0.105 R)
• M81: 76,366,422 km (0.089 R)
• M82: 77,093,767 km (0.088 R)
• M83: 78,848,699 km (0.083 R)
• M84: 78,995,455 km (0.092 R)
• M85: 79,583,823 km (0.049 R)
• M86: 82,248,909 km (0.088 R)
• M87: 83,442,850 km (0.116 R)
• M88: 87,058,630 km (0.059 R)
• M89: 88,885,669 km (0.062 R)
• M90: 89,344,486 km (0.086 R)
• M91: 90,417,851 km (0.112 R)
• M92: 90,725,424 km (0.115 R)
• M93: 91,958,709 km (0.084 R)
• M94: 92,887,412 km (0.068 R)
• M95: 93,663,825 km (0.037 R)
• M96: 96,476,116 km (0.055 R)
• M97: 99,474,805 km (0.047 R)

Kuiper Belt

Range: 30 - 49 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 400 - 11,912 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit