🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.26 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.52 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.52

Radius: 1.45

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.145

Orbit Range: 0.44 AU - 0.6 AU

Year: 242 Days

Day: 17.4 Hours

Environment

Temp: -121 °C

Axial Tilt: 33.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 40,115,477 km

• M1: 64,477 km (0.078 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.54 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.15

Radius: 1.36

Gravity: 1.16 G

Time & Orbit

Eccentricity (e): 0.214

Orbit Range: 0.42 AU - 0.66 AU

Year: 256 Days

Day: 45.3 Hours

Environment

Temp: -121 °C

Axial Tilt: 72.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 0.55 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.57

Radius: 0.8

Gravity: 0.89 G

Time & Orbit

Eccentricity (e): 0.077

Orbit Range: 0.51 AU - 0.59 AU

Year: 263 Days

Day: 16.6 Hours

Environment

Temp: -113 °C

Axial Tilt: 25 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 40,115,477 km

• M1: 116,387 km (0.054 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 565.3

Radius: 13.9

Gravity: 2.93 G

Time & Orbit

Eccentricity (e): 0.188

Orbit Range: 0.66 AU - 0.96 AU

Year: 471 Days

Day: 12.5 Hours

Environment

Temp: -144 °C

Axial Tilt: 6.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (38)

Outer Limit: 40,115,477 km

• M1: 175,478 km (0.034 R)
• M2: 269,276 km (0.095 R)
• M3: 409,300 km (0.09 R)
• M4: 506,688 km (0.057 R)
• M5: 614,548 km (0.06 R)
• M6: 850,015 km (0.059 R)
• M7: 1,006,644 km (0.08 R)
• M8: 1,173,745 km (0.107 R)
• M9: 1,275,771 km (0.097 R)
• M10: 1,370,915 km (0.056 R)
• M11: 1,463,516 km (0.088 R)
• M12: 1,611,917 km (0.096 R)
• M13: 1,748,949 km (0.101 R)
• M14: 1,878,650 km (0.109 R)
• M15: 2,123,991 km (0.095 R)
• M16: 2,220,332 km (0.07 R)
• M17: 2,318,169 km (0.08 R)
• M18: 2,411,368 km (0.101 R)
• M19: 2,505,764 km (0.113 R)
• M20: 2,627,238 km (0.09 R)
• M21: 2,737,641 km (0.103 R)
• M22: 2,829,793 km (0.041 R)
• M23: 2,997,044 km (0.074 R)
• M24: 3,334,537 km (0.109 R)
• M25: 3,561,626 km (0.082 R)
• M26: 3,655,424 km (0.093 R)
• M27: 3,786,621 km (0.034 R)
• M28: 3,904,654 km (0.114 R)
• M29: 4,016,404 km (0.114 R)
• M30: 4,129,200 km (0.034 R)
• M31: 4,373,643 km (0.089 R)
• M32: 4,614,945 km (0.12 R)
• M33: 4,717,419 km (0.108 R)
• M34: 4,924,912 km (0.108 R)
• M35: 5,258,066 km (0.101 R)
• M36: 5,348,872 km (0.107 R)
• M37: 5,598,850 km (0.074 R)
• M38: 5,776,123 km (0.093 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.62 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 865.7

Radius: 13.2

Gravity: 4.97 G

Time & Orbit

Eccentricity (e): 0.019

Orbit Range: 1.59 AU - 1.65 AU

Year: 1331 Days

Day: 5.4 Hours

Environment

Temp: -174 °C

Axial Tilt: 6.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 40,115,477 km

• M1: 204,799 km (0.09 R)
• M2: 365,318 km (0.116 R)
• M3: 477,516 km (0.118 R)
• M4: 782,546 km (0.104 R)
• M5: 901,178 km (0.111 R)
• M6: 1,066,932 km (0.076 R)
• M7: 1,252,134 km (0.108 R)
• M8: 1,358,049 km (0.029 R)
• M9: 1,457,831 km (0.078 R)
• M10: 1,560,306 km (0.114 R)
• M11: 1,646,025 km (0.065 R)
• M12: 1,733,540 km (0.077 R)
• M13: 2,423,486 km (0.058 R)
• M14: 2,671,519 km (0.047 R)
• M15: 2,763,821 km (0.11 R)
• M16: 3,023,223 km (0.12 R)
• M17: 3,107,597 km (0.081 R)
• M18: 3,315,538 km (0.072 R)
• M19: 3,452,719 km (0.088 R)
• M20: 3,888,497 km (0.107 R)
• M21: 4,006,829 km (0.092 R)
• M22: 4,166,600 km (0.085 R)
• M23: 4,328,465 km (0.095 R)
• M24: 4,770,526 km (0.09 R)
• M25: 4,855,049 km (0.089 R)
• M26: 5,154,843 km (0.083 R)
• M27: 5,401,979 km (0.097 R)
• M28: 5,593,764 km (0.12 R)
• M29: 5,772,683 km (0.047 R)
• M30: 5,999,174 km (0.087 R)
• M31: 6,243,916 km (0.093 R)
• M32: 6,336,667 km (0.092 R)
• M33: 6,523,365 km (0.027 R)
• M34: 6,696,150 km (0.098 R)
• M35: 6,790,995 km (0.051 R)
• M36: 6,998,188 km (0.077 R)
• M37: 7,191,319 km (0.069 R)
• M38: 7,288,558 km (0.065 R)
• M39: 7,386,245 km (0.116 R)
• M40: 7,549,905 km (0.106 R)
• M41: 8,082,175 km (0.099 R)
• M42: 8,250,921 km (0.097 R)
• M43: 8,352,797 km (0.114 R)
• M44: 8,472,176 km (0.115 R)
• M45: 8,574,950 km (0.109 R)
• M46: 8,747,287 km (0.081 R)
• M47: 9,182,916 km (0.092 R)
• M48: 9,536,565 km (0.107 R)
• M49: 9,643,528 km (0.117 R)
• M50: 9,732,987 km (0.099 R)
• M51: 9,876,601 km (0.107 R)
• M52: 9,966,809 km (0.073 R)
• M53: 10,366,983 km (0.117 R)
• M54: 11,051,692 km (0.096 R)
• M55: 11,182,890 km (0.094 R)
• M56: 11,484,778 km (0.057 R)
• M57: 11,789,359 km (0.103 R)
• M58: 12,077,335 km (0.103 R)
• M59: 12,426,048 km (0.088 R)
• M60: 12,817,396 km (0.087 R)
• M61: 13,212,783 km (0.085 R)
• M62: 13,332,162 km (0.042 R)
• M63: 13,471,887 km (0.118 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.64 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 294.3

Radius: 13.9

Gravity: 1.52 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 1.54 AU - 1.74 AU

Year: 1356 Days

Day: 13.7 Hours

Environment

Temp: -174 °C

Axial Tilt: 169.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (53)

Outer Limit: 40,115,477 km

• M1: 176,226 km (0.111 R)
• M2: 274,512 km (0.036 R)
• M3: 469,289 km (0.11 R)
• M4: 778,358 km (0.073 R)
• M5: 876,793 km (0.086 R)
• M6: 980,016 km (0.111 R)
• M7: 1,159,982 km (0.078 R)
• M8: 1,268,141 km (0.076 R)
• M9: 1,372,860 km (0.09 R)
• M10: 1,480,720 km (0.097 R)
• M11: 1,576,612 km (0.101 R)
• M12: 1,674,748 km (0.082 R)
• M13: 1,782,907 km (0.12 R)
• M14: 1,885,681 km (0.041 R)
• M15: 2,031,240 km (0.093 R)
• M16: 2,491,104 km (0.047 R)
• M17: 2,579,965 km (0.073 R)
• M18: 2,880,806 km (0.046 R)
• M19: 3,040,427 km (0.073 R)
• M20: 3,135,571 km (0.061 R)
• M21: 3,486,977 km (0.099 R)
• M22: 3,617,127 km (0.113 R)
• M23: 3,769,268 km (0.118 R)
• M24: 3,871,892 km (0.082 R)
• M25: 3,975,563 km (0.032 R)
• M26: 4,080,132 km (0.087 R)
• M27: 4,281,341 km (0.116 R)
• M28: 4,420,916 km (0.088 R)
• M29: 4,594,899 km (0.11 R)
• M30: 4,738,064 km (0.075 R)
• M31: 4,837,995 km (0.114 R)
• M32: 5,141,978 km (0.072 R)
• M33: 5,359,793 km (0.114 R)
• M34: 5,510,587 km (0.102 R)
• M35: 5,745,306 km (0.073 R)
• M36: 5,887,873 km (0.051 R)
• M37: 5,983,466 km (0.093 R)
• M38: 6,261,419 km (0.072 R)
• M39: 6,359,106 km (0.076 R)
• M40: 6,481,926 km (0.066 R)
• M41: 6,580,661 km (0.115 R)
• M42: 6,667,577 km (0.095 R)
• M43: 7,273,897 km (0.098 R)
• M44: 7,441,148 km (0.068 R)
• M45: 7,583,714 km (0.11 R)
• M46: 7,818,882 km (0.113 R)
• M47: 7,990,321 km (0.081 R)
• M48: 8,243,142 km (0.08 R)
• M49: 8,350,404 km (0.094 R)
• M50: 8,498,655 km (0.115 R)
• M51: 8,593,500 km (0.064 R)
• M52: 9,155,838 km (0.098 R)
• M53: 9,434,390 km (0.087 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.82 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 473.6

Radius: 8

Gravity: 7.4 G

Time & Orbit

Eccentricity (e): 0.245

Orbit Range: 2.13 AU - 3.51 AU

Year: 3058 Days

Day: 14 Hours

Environment

Temp: -210 °C

Axial Tilt: 20.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 40,115,477 km

• M1: 115,789 km (0.072 R)
• M2: 184,454 km (0.076 R)
• M3: 235,766 km (0.038 R)
• M4: 313,408 km (0.118 R)
• M5: 373,695 km (0.115 R)
• M6: 438,771 km (0.072 R)
• M7: 508,334 km (0.084 R)
• M8: 616,194 km (0.08 R)
• M9: 668,702 km (0.119 R)
• M10: 741,407 km (0.112 R)
• M11: 816,804 km (0.069 R)
• M12: 1,211,294 km (0.095 R)
• M13: 1,440,927 km (0.069 R)
• M14: 1,536,669 km (0.115 R)
• M15: 1,634,656 km (0.058 R)
• M16: 1,772,884 km (0.098 R)
• M17: 1,824,047 km (0.117 R)
• M18: 1,980,825 km (0.06 R)
• M19: 2,210,458 km (0.074 R)
• M20: 2,293,485 km (0.075 R)
• M21: 2,622,002 km (0.072 R)
• M22: 2,710,115 km (0.083 R)
• M23: 3,011,256 km (0.116 R)
• M24: 3,150,232 km (0.096 R)
• M25: 3,228,322 km (0.091 R)
• M26: 3,466,781 km (0.12 R)
• M27: 3,612,489 km (0.088 R)
• M28: 3,727,381 km (0.099 R)
• M29: 3,876,829 km (0.104 R)
• M30: 3,943,849 km (0.09 R)
• M31: 4,164,506 km (0.043 R)
• M32: 5,327,180 km (0.091 R)
• M33: 6,128,576 km (0.087 R)
• M34: 6,285,504 km (0.103 R)
• M35: 6,744,171 km (0.106 R)
• M36: 7,069,547 km (0.091 R)
• M37: 7,275,543 km (0.073 R)
• M38: 7,400,158 km (0.082 R)
• M39: 7,799,285 km (0.096 R)
• M40: 7,905,499 km (0.076 R)
• M41: 8,076,340 km (0.08 R)
• M42: 8,334,995 km (0.12 R)
• M43: 8,400,220 km (0.1 R)
• M44: 8,487,286 km (0.077 R)
• M45: 8,794,410 km (0.102 R)
• M46: 8,927,103 km (0.057 R)
• M47: 9,600,743 km (0.072 R)
• M48: 9,851,917 km (0.056 R)
• M49: 10,314,025 km (0.083 R)
• M50: 10,524,360 km (0.061 R)
• M51: 10,665,281 km (0.093 R)
• M52: 10,736,041 km (0.106 R)
• M53: 10,996,790 km (0.102 R)
• M54: 11,139,805 km (0.036 R)
• M55: 11,331,590 km (0.068 R)
• M56: 12,011,213 km (0.06 R)
• M57: 12,158,567 km (0.101 R)
• M58: 12,554,403 km (0.084 R)
• M59: 12,629,052 km (0.038 R)
• M60: 12,954,577 km (0.092 R)
• M61: 13,793,073 km (0.113 R)
• M62: 13,844,385 km (0.116 R)
• M63: 14,570,533 km (0.1 R)
• M64: 14,649,072 km (0.09 R)
• M65: 14,806,449 km (0.071 R)
• M66: 14,859,108 km (0.063 R)
• M67: 15,070,190 km (0.076 R)
• M68: 15,229,213 km (0.085 R)
• M69: 15,442,091 km (0.088 R)
• M70: 16,086,409 km (0.086 R)
• M71: 16,303,176 km (0.081 R)
• M72: 16,602,820 km (0.041 R)
• M73: 16,821,981 km (0.083 R)
• M74: 16,904,410 km (0.095 R)
• M75: 17,042,040 km (0.084 R)
• M76: 18,382,138 km (0.035 R)
• M77: 18,950,460 km (0.084 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 125.1

Radius: 10.1

Gravity: 1.23 G

Time & Orbit

Eccentricity (e): 0.04

Orbit Range: 4.38 AU - 4.74 AU

Year: 6287 Days

Day: 5.3 Hours

Environment

Temp: -211 °C

Axial Tilt: 20.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 40,115,477 km

• M1: 134,788 km (0.08 R)
• M2: 213,626 km (0.062 R)
• M3: 388,506 km (0.115 R)
• M4: 549,323 km (0.114 R)
• M5: 670,049 km (0.118 R)
• M6: 1,312,572 km (0.089 R)
• M7: 1,383,032 km (0.095 R)
• M8: 1,454,839 km (0.069 R)
• M9: 1,552,676 km (0.072 R)
• M10: 1,690,905 km (0.095 R)
• M11: 2,242,322 km (0.092 R)
• M12: 2,428,422 km (0.101 R)
• M13: 2,694,557 km (0.063 R)
• M14: 3,287,264 km (0.102 R)
• M15: 3,988,429 km (0.074 R)
• M16: 4,109,753 km (0.067 R)
• M17: 4,179,615 km (0.094 R)
• M18: 4,338,338 km (0.081 R)
• M19: 4,409,547 km (0.025 R)
• M20: 4,698,271 km (0.037 R)
• M21: 4,808,225 km (0.088 R)
• M22: 4,993,278 km (0.065 R)
• M23: 5,105,476 km (0.117 R)
• M24: 5,199,573 km (0.093 R)
• M25: 5,332,267 km (0.112 R)
• M26: 5,466,306 km (0.088 R)
• M27: 5,562,647 km (0.075 R)
• M28: 5,737,378 km (0.109 R)
• M29: 6,232,696 km (0.112 R)
• M30: 6,907,532 km (0.114 R)
• M31: 7,285,416 km (0.079 R)
• M32: 7,476,902 km (0.089 R)
• M33: 7,930,183 km (0.066 R)
• M34: 8,215,317 km (0.112 R)
• M35: 8,348,010 km (0.102 R)
• M36: 8,638,080 km (0.111 R)
• M37: 8,886,114 km (0.115 R)
• M38: 9,320,097 km (0.11 R)
• M39: 9,481,812 km (0.065 R)
• M40: 9,714,287 km (0.114 R)
• M41: 9,972,344 km (0.096 R)
• M42: 10,327,788 km (0.092 R)
• M43: 10,566,995 km (0.113 R)
• M44: 10,905,086 km (0.095 R)
• M45: 11,246,768 km (0.112 R)
• M46: 11,592,040 km (0.105 R)
• M47: 11,815,838 km (0.095 R)
• M48: 11,965,735 km (0.104 R)
• M49: 12,091,248 km (0.111 R)
• M50: 12,368,902 km (0.088 R)
• M51: 12,546,624 km (0.119 R)
• M52: 12,725,244 km (0.107 R)
• M53: 12,853,299 km (0.03 R)
• M54: 13,291,920 km (0.063 R)
• M55: 13,683,119 km (0.105 R)
• M56: 14,078,207 km (0.045 R)
• M57: 14,290,337 km (0.099 R)
• M58: 14,664,331 km (0.091 R)
• M59: 14,744,815 km (0.078 R)
• M60: 15,041,468 km (0.101 R)
• M61: 15,176,854 km (0.12 R)
• M62: 15,531,101 km (0.115 R)
• M63: 15,887,892 km (0.113 R)
• M64: 15,998,295 km (0.112 R)
• M65: 16,164,349 km (0.092 R)
• M66: 16,777,850 km (0.099 R)
• M67: 16,974,721 km (0.105 R)
• M68: 17,087,518 km (0.12 R)
• M69: 17,342,283 km (0.094 R)
• M70: 17,769,833 km (0.072 R)
• M71: 17,999,167 km (0.058 R)
• M72: 18,316,165 km (0.079 R)
• M73: 18,431,954 km (0.119 R)
• M74: 18,664,130 km (0.111 R)
• M75: 18,809,838 km (0.073 R)
• M76: 19,513,995 km (0.11 R)
• M77: 19,839,819 km (0.029 R)

Planet 9 - Gas Giant

Semi-Major Axis: 4.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 898.7

Radius: 8.8

Gravity: 11.61 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 4.53 AU - 4.97 AU

Year: 6684 Days

Day: 8.7 Hours

Environment

Temp: -206 °C

Axial Tilt: 7.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (87)

Outer Limit: 40,115,477 km

• M1: 110,702 km (0.042 R)
• M2: 205,996 km (0.034 R)
• M3: 382,671 km (0.112 R)
• M4: 491,279 km (0.09 R)
• M5: 668,254 km (0.074 R)
• M6: 772,374 km (0.084 R)
• M7: 850,314 km (0.087 R)
• M8: 1,629,121 km (0.105 R)
• M9: 1,984,565 km (0.049 R)
• M10: 2,503,670 km (0.098 R)
• M11: 3,088,598 km (0.091 R)
• M12: 3,164,593 km (0.109 R)
• M13: 3,448,829 km (0.086 R)
• M14: 4,042,134 km (0.1 R)
• M15: 4,209,534 km (0.106 R)
• M16: 4,379,178 km (0.099 R)
• M17: 4,901,574 km (0.062 R)
• M18: 5,910,313 km (0.116 R)
• M19: 6,357,162 km (0.061 R)
• M20: 7,555,889 km (0.097 R)
• M21: 7,866,454 km (0.114 R)
• M22: 7,936,017 km (0.045 R)
• M23: 8,145,903 km (0.084 R)
• M24: 8,714,824 km (0.106 R)
• M25: 9,591,916 km (0.118 R)
• M26: 10,306,246 km (0.071 R)
• M27: 10,612,174 km (0.117 R)
• M28: 10,882,198 km (0.089 R)
• M29: 11,272,050 km (0.077 R)
• M30: 11,350,589 km (0.057 R)
• M31: 11,666,540 km (0.119 R)
• M32: 11,825,562 km (0.097 R)
• M33: 12,186,093 km (0.102 R)
• M34: 12,672,286 km (0.037 R)
• M35: 12,753,966 km (0.052 R)
• M36: 13,663,821 km (0.112 R)
• M37: 14,466,413 km (0.118 R)
• M38: 14,680,189 km (0.102 R)
• M39: 14,938,095 km (0.117 R)
• M40: 15,284,265 km (0.1 R)
• M41: 15,371,181 km (0.108 R)
• M42: 16,561,232 km (0.111 R)
• M43: 16,650,542 km (0.077 R)
• M44: 16,784,881 km (0.117 R)
• M45: 16,919,519 km (0.036 R)
• M46: 17,552,617 km (0.119 R)
• M47: 18,331,873 km (0.045 R)
• M48: 19,781,925 km (0.094 R)
• M49: 19,876,620 km (0.07 R)
• M50: 20,257,347 km (0.085 R)
• M51: 20,448,683 km (0.047 R)
• M52: 22,049,529 km (0.093 R)
• M53: 22,591,971 km (0.059 R)
• M54: 22,939,487 km (0.088 R)
• M55: 23,639,904 km (0.103 R)
• M56: 24,959,208 km (0.113 R)
• M57: 25,576,150 km (0.089 R)
• M58: 25,834,655 km (0.049 R)
• M59: 26,042,147 km (0.063 R)
• M60: 26,354,358 km (0.058 R)
• M61: 26,720,274 km (0.067 R)
• M62: 27,245,811 km (0.03 R)
• M63: 28,093,732 km (0.086 R)
• M64: 28,414,021 km (0.104 R)
• M65: 29,544,233 km (0.111 R)
• M66: 29,815,604 km (0.06 R)
• M67: 30,360,589 km (0.055 R)
• M68: 30,415,341 km (0.072 R)
• M69: 30,853,962 km (0.105 R)
• M70: 31,019,118 km (0.101 R)
• M71: 32,629,540 km (0.112 R)
• M72: 32,797,837 km (0.058 R)
• M73: 33,529,820 km (0.083 R)
• M74: 34,153,343 km (0.097 R)
• M75: 34,552,171 km (0.093 R)
• M76: 34,666,464 km (0.07 R)
• M77: 34,780,907 km (0.094 R)
• M78: 34,895,349 km (0.081 R)
• M79: 35,757,930 km (0.066 R)
• M80: 36,047,103 km (0.104 R)
• M81: 36,104,997 km (0.086 R)
• M82: 36,802,423 km (0.12 R)
• M83: 36,977,452 km (0.119 R)
• M84: 37,269,916 km (0.098 R)
• M85: 37,680,562 km (0.069 R)
• M86: 39,457,186 km (0.099 R)
• M87: 39,636,405 km (0.104 R)

Kuiper Belt

Range: 30 - 53 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 384 - 12,072 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit