🌌 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 - Gas Giant

Semi-Major Axis: 0.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 279.7

Radius: 10.9

Gravity: 2.35 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 0.5 AU - 0.54 AU

Year: 250 Days

Day: 13.7 Hours

Environment

Temp: -147 °C

Axial Tilt: 32.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (31)

Outer Limit: 74,095,427 km

• M1: 135,835 km (0.117 R)
• M2: 217,964 km (0.093 R)
• M3: 286,181 km (0.099 R)
• M4: 364,869 km (0.042 R)
• M5: 443,558 km (0.099 R)
• M6: 538,702 km (0.117 R)
• M7: 612,902 km (0.119 R)
• M8: 706,401 km (0.113 R)
• M9: 821,442 km (0.115 R)
• M10: 903,870 km (0.108 R)
• M11: 1,018,462 km (0.097 R)
• M12: 1,116,898 km (0.118 R)
• M13: 1,190,649 km (0.118 R)
• M14: 1,269,188 km (0.097 R)
• M15: 1,353,113 km (0.072 R)
• M16: 1,445,564 km (0.075 R)
• M17: 1,516,324 km (0.11 R)
• M18: 1,622,987 km (0.11 R)
• M19: 1,739,524 km (0.118 R)
• M20: 1,818,811 km (0.098 R)
• M21: 1,899,444 km (0.034 R)
• M22: 1,985,014 km (0.063 R)
• M23: 2,087,040 km (0.065 R)
• M24: 2,179,342 km (0.081 R)
• M25: 2,364,245 km (0.094 R)
• M26: 2,432,461 km (0.1 R)
• M27: 2,521,622 km (0.07 R)
• M28: 2,628,584 km (0.106 R)
• M29: 2,707,572 km (0.103 R)
• M30: 2,846,997 km (0.104 R)
• M31: 3,023,373 km (0.069 R)

Planet 2 - Gas Giant

Semi-Major Axis: 2.51 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 418.3

Radius: 9.9

Gravity: 4.27 G

Time & Orbit

Eccentricity (e): 0.164

Orbit Range: 2.1 AU - 2.92 AU

Year: 2652 Days

Day: 12.2 Hours

Environment

Temp: -214 °C

Axial Tilt: 124.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 74,095,427 km

• M1: 144,960 km (0.113 R)
• M2: 209,736 km (0.069 R)
• M3: 349,909 km (0.091 R)
• M4: 650,003 km (0.118 R)
• M5: 940,372 km (0.071 R)
• M6: 1,033,572 km (0.106 R)
• M7: 1,199,476 km (0.099 R)
• M8: 1,492,239 km (0.095 R)
• M9: 1,692,401 km (0.109 R)
• M10: 1,830,779 km (0.1 R)
• M11: 1,961,078 km (0.074 R)
• M12: 2,143,737 km (0.102 R)
• M13: 2,421,840 km (0.055 R)
• M14: 2,711,761 km (0.088 R)
• M15: 2,792,843 km (0.107 R)
• M16: 3,096,975 km (0.118 R)
• M17: 3,181,797 km (0.043 R)
• M18: 3,455,561 km (0.072 R)
• M19: 3,857,979 km (0.073 R)
• M20: 3,949,384 km (0.094 R)
• M21: 4,041,536 km (0.115 R)
• M22: 4,119,028 km (0.113 R)
• M23: 4,275,208 km (0.097 R)
• M24: 4,338,338 km (0.111 R)
• M25: 4,449,489 km (0.066 R)
• M26: 5,069,273 km (0.076 R)
• M27: 5,287,537 km (0.09 R)
• M28: 5,423,521 km (0.104 R)
• M29: 5,629,517 km (0.079 R)
• M30: 5,698,781 km (0.113 R)
• M31: 5,785,847 km (0.075 R)
• M32: 5,961,176 km (0.087 R)
• M33: 6,227,460 km (0.029 R)
• M34: 6,299,118 km (0.051 R)
• M35: 6,533,986 km (0.074 R)
• M36: 6,826,899 km (0.07 R)
• M37: 7,255,796 km (0.07 R)
• M38: 7,331,193 km (0.044 R)
• M39: 7,502,034 km (0.109 R)
• M40: 7,578,329 km (0.059 R)
• M41: 7,712,518 km (0.049 R)
• M42: 7,866,903 km (0.106 R)
• M43: 8,002,888 km (0.078 R)
• M44: 8,574,202 km (0.081 R)
• M45: 9,057,104 km (0.049 R)
• M46: 9,445,610 km (0.103 R)
• M47: 9,610,915 km (0.112 R)
• M48: 10,028,144 km (0.114 R)
• M49: 10,133,461 km (0.041 R)
• M50: 10,302,656 km (0.05 R)
• M51: 10,622,346 km (0.069 R)
• M52: 10,686,823 km (0.119 R)
• M53: 11,184,386 km (0.114 R)
• M54: 11,315,433 km (0.085 R)
• M55: 11,889,440 km (0.111 R)
• M56: 12,112,640 km (0.052 R)
• M57: 12,247,278 km (0.096 R)
• M58: 12,450,133 km (0.115 R)
• M59: 12,518,051 km (0.097 R)
• M60: 12,608,707 km (0.087 R)
• M61: 12,905,060 km (0.045 R)
• M62: 12,973,726 km (0.119 R)
• M63: 14,587,139 km (0.111 R)
• M64: 14,706,518 km (0.077 R)
• M65: 14,922,238 km (0.117 R)
• M66: 15,042,515 km (0.077 R)
• M67: 15,673,219 km (0.083 R)
• M68: 16,610,600 km (0.075 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.61 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 354.2

Radius: 11.7

Gravity: 2.59 G

Time & Orbit

Eccentricity (e): 0.025

Orbit Range: 2.54 AU - 2.68 AU

Year: 2812 Days

Day: 13.5 Hours

Environment

Temp: -213 °C

Axial Tilt: 24.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 74,095,427 km

• M1: 175,628 km (0.088 R)
• M2: 495,169 km (0.115 R)
• M3: 602,281 km (0.06 R)
• M4: 710,291 km (0.053 R)
• M5: 834,457 km (0.087 R)
• M6: 912,697 km (0.103 R)
• M7: 1,384,977 km (0.034 R)
• M8: 1,799,962 km (0.119 R)
• M9: 2,154,658 km (0.066 R)
• M10: 2,315,326 km (0.106 R)
• M11: 2,480,034 km (0.054 R)
• M12: 2,661,945 km (0.11 R)
• M13: 2,741,231 km (0.087 R)
• M14: 2,834,880 km (0.112 R)
• M15: 2,929,575 km (0.117 R)
• M16: 3,304,767 km (0.104 R)
• M17: 3,433,271 km (0.052 R)
• M18: 3,769,567 km (0.094 R)
• M19: 3,859,027 km (0.045 R)
• M20: 4,085,817 km (0.111 R)
• M21: 4,442,309 km (0.103 R)
• M22: 4,600,434 km (0.092 R)
• M23: 4,792,667 km (0.081 R)
• M24: 5,102,634 km (0.063 R)
• M25: 5,402,428 km (0.051 R)
• M26: 5,520,461 km (0.104 R)
• M27: 5,880,094 km (0.048 R)
• M28: 6,407,127 km (0.065 R)
• M29: 6,550,292 km (0.065 R)
• M30: 6,785,011 km (0.116 R)
• M31: 7,041,123 km (0.048 R)
• M32: 7,170,376 km (0.116 R)
• M33: 7,300,376 km (0.081 R)
• M34: 7,752,162 km (0.095 R)
• M35: 7,943,198 km (0.107 R)
• M36: 8,039,240 km (0.046 R)
• M37: 8,135,731 km (0.065 R)
• M38: 8,447,044 km (0.093 R)
• M39: 8,742,350 km (0.074 R)
• M40: 8,941,166 km (0.114 R)
• M41: 9,021,200 km (0.05 R)
• M42: 9,242,306 km (0.078 R)
• M43: 9,404,321 km (0.107 R)
• M44: 9,506,047 km (0.109 R)
• M45: 9,751,537 km (0.097 R)
• M46: 9,895,899 km (0.087 R)
• M47: 10,061,504 km (0.04 R)
• M48: 10,270,043 km (0.115 R)
• M49: 10,946,675 km (0.106 R)
• M50: 11,053,787 km (0.096 R)
• M51: 11,225,824 km (0.07 R)
• M52: 11,398,759 km (0.098 R)
• M53: 11,572,442 km (0.118 R)
• M54: 11,900,660 km (0.091 R)
• M55: 12,232,019 km (0.066 R)
• M56: 12,611,250 km (0.053 R)
• M57: 12,881,274 km (0.095 R)
• M58: 13,153,243 km (0.106 R)
• M59: 13,381,230 km (0.088 R)
• M60: 13,472,784 km (0.117 R)
• M61: 13,564,637 km (0.08 R)
• M62: 13,725,904 km (0.106 R)
• M63: 14,026,895 km (0.119 R)
• M64: 14,213,144 km (0.115 R)
• M65: 14,541,212 km (0.07 R)
• M66: 14,824,401 km (0.084 R)
• M67: 14,919,246 km (0.097 R)
• M68: 15,014,241 km (0.115 R)
• M69: 16,365,409 km (0.097 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.22 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 899.3

Radius: 11.3

Gravity: 7.04 G

Time & Orbit

Eccentricity (e): 0.016

Orbit Range: 3.17 AU - 3.27 AU

Year: 3853 Days

Day: 14.1 Hours

Environment

Temp: -212 °C

Axial Tilt: 16.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 74,095,427 km

• M1: 160,369 km (0.101 R)
• M2: 236,963 km (0.082 R)
• M3: 313,856 km (0.116 R)
• M4: 497,263 km (0.074 R)
• M5: 674,686 km (0.03 R)
• M6: 874,699 km (0.076 R)
• M7: 962,961 km (0.107 R)
• M8: 1,275,621 km (0.097 R)
• M9: 1,466,658 km (0.058 R)
• M10: 1,620,145 km (0.099 R)
• M11: 1,795,324 km (0.116 R)
• M12: 2,287,501 km (0.097 R)
• M13: 2,412,565 km (0.056 R)
• M14: 2,613,774 km (0.102 R)
• M15: 2,801,519 km (0.073 R)
• M16: 2,916,410 km (0.096 R)
• M17: 3,150,830 km (0.111 R)
• M18: 3,230,416 km (0.119 R)
• M19: 3,452,719 km (0.063 R)
• M20: 3,596,931 km (0.114 R)
• M21: 3,764,182 km (0.082 R)
• M22: 4,237,360 km (0.032 R)
• M23: 4,458,765 km (0.084 R)
• M24: 4,821,091 km (0.076 R)
• M25: 5,005,844 km (0.08 R)
• M26: 5,477,975 km (0.093 R)
• M27: 5,622,486 km (0.077 R)
• M28: 5,743,810 km (0.081 R)
• M29: 6,490,304 km (0.082 R)
• M30: 6,592,180 km (0.085 R)
• M31: 6,797,578 km (0.07 R)
• M32: 6,978,890 km (0.108 R)
• M33: 7,214,657 km (0.073 R)
• M34: 7,801,679 km (0.08 R)
• M35: 8,183,303 km (0.102 R)
• M36: 8,265,881 km (0.078 R)
• M37: 8,880,130 km (0.116 R)
• M38: 9,078,646 km (0.088 R)
• M39: 10,004,806 km (0.094 R)
• M40: 10,749,205 km (0.108 R)
• M41: 11,666,091 km (0.077 R)
• M42: 11,790,257 km (0.063 R)
• M43: 12,767,281 km (0.12 R)
• M44: 12,959,514 km (0.06 R)
• M45: 13,184,808 km (0.113 R)
• M46: 13,704,811 km (0.095 R)
• M47: 13,967,355 km (0.101 R)
• M48: 14,099,300 km (0.068 R)
• M49: 14,264,755 km (0.112 R)
• M50: 14,464,169 km (0.05 R)
• M51: 15,270,951 km (0.11 R)
• M52: 15,577,327 km (0.069 R)
• M53: 15,748,317 km (0.119 R)
• M54: 15,851,390 km (0.093 R)
• M55: 16,023,428 km (0.103 R)
• M56: 16,300,034 km (0.109 R)
• M57: 16,404,155 km (0.091 R)
• M58: 16,543,430 km (0.062 R)
• M59: 17,351,408 km (0.079 R)
• M60: 17,635,495 km (0.106 R)
• M61: 17,778,061 km (0.085 R)
• M62: 18,280,261 km (0.049 R)
• M63: 18,497,029 km (0.079 R)
• M64: 18,823,601 km (0.077 R)
• M65: 19,262,072 km (0.03 R)
• M66: 19,666,884 km (0.11 R)
• M67: 20,111,788 km (0.114 R)
• M68: 20,223,538 km (0.097 R)
• M69: 20,635,081 km (0.056 R)
• M70: 21,162,863 km (0.062 R)
• M71: 21,656,835 km (0.097 R)
• M72: 21,924,466 km (0.045 R)
• M73: 22,695,044 km (0.085 R)
• M74: 23,044,654 km (0.106 R)
• M75: 23,122,744 km (0.112 R)
• M76: 24,144,049 km (0.095 R)
• M77: 24,899,668 km (0.092 R)
• M78: 25,380,924 km (0.088 R)
• M79: 25,986,796 km (0.117 R)
• M80: 27,130,621 km (0.106 R)
• M81: 27,460,484 km (0.052 R)
• M82: 27,750,106 km (0.085 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.68 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 905.8

Radius: 9.6

Gravity: 9.83 G

Time & Orbit

Eccentricity (e): 0.154

Orbit Range: 4.81 AU - 6.55 AU

Year: 9027 Days

Day: 10.5 Hours

Environment

Temp: -232 °C

Axial Tilt: 9.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 74,095,427 km

• M1: 161,267 km (0.12 R)
• M2: 556,504 km (0.087 R)
• M3: 634,893 km (0.037 R)
• M4: 786,436 km (0.108 R)
• M5: 988,692 km (0.103 R)
• M6: 1,811,181 km (0.108 R)
• M7: 2,031,240 km (0.098 R)
• M8: 2,208,364 km (0.064 R)
• M9: 2,687,376 km (0.069 R)
• M10: 2,770,253 km (0.086 R)
• M11: 2,938,850 km (0.114 R)
• M12: 3,831,949 km (0.095 R)
• M13: 4,405,807 km (0.1 R)
• M14: 5,074,809 km (0.108 R)
• M15: 5,177,882 km (0.046 R)
• M16: 5,386,271 km (0.03 R)
• M17: 5,456,283 km (0.065 R)
• M18: 5,562,049 km (0.104 R)
• M19: 6,357,760 km (0.091 R)
• M20: 6,543,560 km (0.12 R)
• M21: 7,150,479 km (0.059 R)
• M22: 7,499,640 km (0.119 R)
• M23: 7,934,073 km (0.068 R)
• M24: 8,417,423 km (0.097 R)
• M25: 8,539,794 km (0.081 R)
• M26: 8,951,787 km (0.095 R)
• M27: 10,620,102 km (0.078 R)
• M28: 10,752,347 km (0.028 R)
• M29: 11,693,467 km (0.12 R)
• M30: 11,967,231 km (0.099 R)
• M31: 12,660,917 km (0.085 R)
• M32: 13,942,222 km (0.072 R)
• M33: 14,329,681 km (0.108 R)
• M34: 14,427,069 km (0.115 R)
• M35: 16,934,030 km (0.105 R)
• M36: 17,921,376 km (0.096 R)
• M37: 18,079,052 km (0.049 R)
• M38: 18,184,369 km (0.094 R)
• M39: 20,607,855 km (0.099 R)
• M40: 21,271,172 km (0.108 R)
• M41: 21,605,373 km (0.101 R)
• M42: 21,717,272 km (0.106 R)
• M43: 22,788,992 km (0.048 R)
• M44: 23,877,915 km (0.05 R)
• M45: 24,399,712 km (0.097 R)
• M46: 25,809,223 km (0.033 R)
• M47: 26,583,841 km (0.118 R)
• M48: 26,703,669 km (0.086 R)
• M49: 27,608,137 km (0.101 R)
• M50: 28,339,073 km (0.115 R)
• M51: 28,400,258 km (0.077 R)
• M52: 29,882,025 km (0.066 R)
• M53: 31,072,824 km (0.064 R)
• M54: 31,262,215 km (0.061 R)
• M55: 32,215,303 km (0.112 R)
• M56: 32,279,181 km (0.063 R)
• M57: 33,242,292 km (0.095 R)
• M58: 33,436,022 km (0.073 R)
• M59: 34,084,678 km (0.093 R)
• M60: 34,280,053 km (0.108 R)
• M61: 34,541,101 km (0.102 R)
• M62: 35,262,612 km (0.102 R)
• M63: 35,592,176 km (0.113 R)
• M64: 36,587,002 km (0.065 R)
• M65: 36,653,573 km (0.065 R)
• M66: 36,787,014 km (0.094 R)
• M67: 37,792,760 km (0.117 R)
• M68: 38,062,635 km (0.097 R)
• M69: 38,807,632 km (0.116 R)
• M70: 39,079,751 km (0.083 R)
• M71: 40,312,288 km (0.101 R)
• M72: 41,487,828 km (0.111 R)
• M73: 42,114,793 km (0.116 R)
• M74: 42,604,576 km (0.056 R)
• M75: 43,307,686 km (0.09 R)
• M76: 43,731,347 km (0.105 R)
• M77: 44,511,500 km (0.108 R)
• M78: 45,010,409 km (0.107 R)
• M79: 45,511,263 km (0.056 R)
• M80: 45,798,191 km (0.105 R)
• M81: 45,869,998 km (0.074 R)
• M82: 45,941,955 km (0.052 R)
• M83: 46,373,994 km (0.079 R)
• M84: 46,518,355 km (0.116 R)
• M85: 47,097,150 km (0.041 R)
• M86: 48,554,383 km (0.095 R)
• M87: 48,627,685 km (0.036 R)
• M88: 48,847,744 km (0.113 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.91 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 804.4

Radius: 4.3

Gravity: 43.5 G

Time & Orbit

Eccentricity (e): 0.196

Orbit Range: 7.16 AU - 10.66 AU

Year: 17736 Days

Day: 21.4 Hours

Environment

Temp: -240 °C

Axial Tilt: 22 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 74,095,427 km

• M1: 138,827 km (0.058 R)
• M2: 262,843 km (0.11 R)
• M3: 668,104 km (0.075 R)
• M4: 1,366,427 km (0.068 R)
• M5: 1,888,374 km (0.089 R)
• M6: 2,572,635 km (0.103 R)
• M7: 4,015,506 km (0.112 R)
• M8: 4,528,178 km (0.103 R)
• M9: 6,675,955 km (0.075 R)
• M10: 6,825,552 km (0.107 R)
• M11: 7,486,326 km (0.115 R)
• M12: 7,538,087 km (0.085 R)
• M13: 7,955,764 km (0.089 R)
• M14: 8,167,445 km (0.102 R)
• M15: 9,420,028 km (0.092 R)
• M16: 10,441,333 km (0.076 R)
• M17: 10,499,078 km (0.107 R)
• M18: 10,556,972 km (0.063 R)
• M19: 10,672,910 km (0.091 R)
• M20: 11,437,655 km (0.119 R)
• M21: 11,977,254 km (0.114 R)
• M22: 13,898,689 km (0.076 R)
• M23: 13,962,268 km (0.119 R)
• M24: 14,732,398 km (0.089 R)
• M25: 14,862,249 km (0.085 R)
• M26: 15,648,386 km (0.042 R)
• M27: 16,046,466 km (0.115 R)
• M28: 16,649,944 km (0.108 R)
• M29: 17,124,468 km (0.052 R)
• M30: 17,672,146 km (0.118 R)
• M31: 17,810,075 km (0.119 R)
• M32: 17,879,040 km (0.116 R)
• M33: 18,086,831 km (0.102 R)
• M34: 18,156,095 km (0.077 R)
• M35: 19,207,768 km (0.116 R)
• M36: 19,776,689 km (0.09 R)
• M37: 20,135,125 km (0.095 R)
• M38: 20,785,577 km (0.084 R)
• M39: 21,589,965 km (0.039 R)
• M40: 22,181,325 km (0.088 R)
• M41: 22,330,025 km (0.099 R)
• M42: 23,228,959 km (0.112 R)
• M43: 23,304,506 km (0.081 R)
• M44: 25,216,965 km (0.08 R)
• M45: 25,683,411 km (0.062 R)
• M46: 25,839,591 km (0.05 R)
• M47: 26,152,700 km (0.11 R)
• M48: 26,782,956 km (0.119 R)
• M49: 29,190,135 km (0.116 R)
• M50: 29,597,939 km (0.061 R)
• M51: 30,749,992 km (0.098 R)
• M52: 31,331,628 km (0.108 R)
• M53: 31,498,430 km (0.089 R)
• M54: 32,843,465 km (0.112 R)
• M55: 34,035,760 km (0.096 R)
• M56: 35,155,649 km (0.088 R)
• M57: 36,199,842 km (0.045 R)
• M58: 36,638,015 km (0.098 R)
• M59: 37,166,095 km (0.077 R)
• M60: 38,051,864 km (0.097 R)
• M61: 38,408,057 km (0.103 R)
• M62: 41,571,902 km (0.112 R)
• M63: 41,847,012 km (0.098 R)
• M64: 42,860,688 km (0.079 R)
• M65: 42,953,289 km (0.088 R)
• M66: 43,975,790 km (0.104 R)
• M67: 45,382,908 km (0.028 R)
• M68: 45,666,096 km (0.106 R)
• M69: 49,110,139 km (0.109 R)
• M70: 50,961,263 km (0.09 R)
• M71: 51,845,984 km (0.117 R)
• M72: 52,142,039 km (0.112 R)
• M73: 53,830,251 km (0.07 R)
• M74: 55,839,200 km (0.079 R)
• M75: 57,463,983 km (0.098 R)
• M76: 57,770,359 km (0.115 R)
• M77: 60,759,774 km (0.079 R)
• M78: 61,384,644 km (0.097 R)
• M79: 61,697,752 km (0.089 R)
• M80: 62,745,536 km (0.116 R)
• M81: 64,010,535 km (0.107 R)
• M82: 64,646,326 km (0.115 R)
• M83: 66,137,667 km (0.091 R)
• M84: 66,565,817 km (0.058 R)
• M85: 66,780,340 km (0.076 R)
• M86: 66,887,602 km (0.062 R)
• M87: 67,102,424 km (0.071 R)
• M88: 69,480,133 km (0.108 R)
• M89: 69,915,313 km (0.04 R)
• M90: 70,569,953 km (0.059 R)
• M91: 71,445,998 km (0.103 R)
• M92: 71,775,413 km (0.12 R)
• M93: 71,995,322 km (0.103 R)
• M94: 72,105,276 km (0.219 R)
• M95: 72,877,052 km (0.085 R)

Kuiper Belt

Range: 30 - 59 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 210 - 12,444 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit