🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.39 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 678.9

Radius: 9.9

Gravity: 6.93 G

Time & Orbit

Eccentricity (e): 0.116

Orbit Range: 0.68 AU - 0.86 AU

Year: 475 Days

Day: 7.6 Hours

Environment

Temp: -169 °C

Axial Tilt: 39 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 88,951,634 km

• M1: 125,363 km (0.089 R)
• M2: 187,745 km (0.085 R)
• M3: 267,331 km (0.047 R)
• M4: 344,225 km (0.104 R)
• M5: 431,291 km (0.117 R)
• M6: 561,441 km (0.106 R)
• M7: 701,764 km (0.069 R)
• M8: 765,792 km (0.051 R)
• M9: 850,015 km (0.113 R)
• M10: 937,679 km (0.104 R)
• M11: 1,092,663 km (0.046 R)
• M12: 1,193,941 km (0.072 R)
• M13: 1,303,895 km (0.099 R)
• M14: 1,373,608 km (0.107 R)
• M15: 1,551,031 km (0.11 R)
• M16: 1,625,381 km (0.076 R)
• M17: 1,689,259 km (0.087 R)
• M18: 1,996,533 km (0.12 R)
• M19: 2,065,199 km (0.073 R)
• M20: 2,217,788 km (0.108 R)
• M21: 2,394,015 km (0.079 R)
• M22: 2,487,214 km (0.063 R)
• M23: 2,774,293 km (0.077 R)
• M24: 2,985,973 km (0.106 R)
• M25: 3,050,450 km (0.116 R)
• M26: 3,269,162 km (0.071 R)
• M27: 3,335,733 km (0.047 R)
• M28: 3,447,633 km (0.103 R)
• M29: 3,545,769 km (0.114 R)
• M30: 3,652,582 km (0.074 R)
• M31: 3,768,071 km (0.034 R)
• M32: 3,845,862 km (0.081 R)
• M33: 3,916,173 km (0.104 R)
• M34: 4,364,069 km (0.068 R)
• M35: 4,453,977 km (0.111 R)
• M36: 4,610,756 km (0.083 R)
• M37: 4,845,176 km (0.086 R)
• M38: 4,946,753 km (0.073 R)
• M39: 5,074,958 km (0.118 R)
• M40: 5,360,690 km (0.105 R)
• M41: 5,448,205 km (0.034 R)
• M42: 5,554,120 km (0.075 R)
• M43: 5,669,460 km (0.116 R)
• M44: 5,776,722 km (0.115 R)
• M45: 6,002,315 km (0.1 R)
• M46: 6,120,797 km (0.111 R)
• M47: 6,193,950 km (0.092 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.33 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 575.2

Radius: 14.4

Gravity: 2.77 G

Time & Orbit

Eccentricity (e): 0.104

Orbit Range: 1.19 AU - 1.47 AU

Year: 1078 Days

Day: 12.7 Hours

Environment

Temp: -181 °C

Axial Tilt: 24.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 88,951,634 km

• M1: 183,706 km (0.032 R)
• M2: 281,693 km (0.082 R)
• M3: 432,936 km (0.087 R)
• M4: 587,022 km (0.114 R)
• M5: 678,277 km (0.047 R)
• M6: 781,499 km (0.054 R)
• M7: 884,572 km (0.052 R)
• M8: 1,059,153 km (0.075 R)
• M9: 1,267,692 km (0.105 R)
• M10: 1,377,348 km (0.103 R)
• M11: 1,630,617 km (0.057 R)
• M12: 1,975,440 km (0.055 R)
• M13: 2,130,573 km (0.025 R)
• M14: 2,371,276 km (0.043 R)
• M15: 2,639,804 km (0.084 R)
• M16: 2,753,947 km (0.093 R)
• M17: 3,056,733 km (0.113 R)
• M18: 3,146,791 km (0.114 R)
• M19: 3,247,770 km (0.097 R)
• M20: 3,370,590 km (0.097 R)
• M21: 3,494,905 km (0.047 R)
• M22: 3,673,675 km (0.075 R)
• M23: 3,769,567 km (0.11 R)
• M24: 3,877,278 km (0.118 R)
• M25: 4,117,681 km (0.106 R)
• M26: 4,464,898 km (0.116 R)
• M27: 4,567,522 km (0.102 R)
• M28: 4,670,894 km (0.101 R)
• M29: 4,892,000 km (0.102 R)
• M30: 5,320,149 km (0.11 R)
• M31: 5,477,825 km (0.105 R)
• M32: 5,686,514 km (0.098 R)
• M33: 6,061,107 km (0.097 R)
• M34: 6,238,680 km (0.041 R)
• M35: 6,508,255 km (0.089 R)
• M36: 6,625,091 km (0.111 R)
• M37: 6,939,845 km (0.093 R)
• M38: 7,032,745 km (0.117 R)
• M39: 7,152,573 km (0.114 R)
• M40: 7,516,395 km (0.068 R)
• M41: 7,652,679 km (0.102 R)
• M42: 7,872,438 km (0.053 R)
• M43: 8,024,729 km (0.113 R)
• M44: 8,122,267 km (0.071 R)
• M45: 8,248,228 km (0.077 R)
• M46: 8,873,099 km (0.072 R)
• M47: 9,337,151 km (0.085 R)
• M48: 9,616,600 km (0.115 R)
• M49: 9,720,122 km (0.051 R)
• M50: 10,018,270 km (0.08 R)
• M51: 10,228,904 km (0.093 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.62 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 486.2

Radius: 13.4

Gravity: 2.71 G

Time & Orbit

Eccentricity (e): 0.099

Orbit Range: 3.26 AU - 3.98 AU

Year: 4841 Days

Day: 7.7 Hours

Environment

Temp: -208 °C

Axial Tilt: 47.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 88,951,634 km

• M1: 170,990 km (0.06 R)
• M2: 270,174 km (0.095 R)
• M3: 384,167 km (0.1 R)
• M4: 495,319 km (0.11 R)
• M5: 651,798 km (0.038 R)
• M6: 1,032,525 km (0.079 R)
• M7: 1,174,942 km (0.102 R)
• M8: 1,296,714 km (0.104 R)
• M9: 1,422,975 km (0.09 R)
• M10: 1,568,384 km (0.098 R)
• M11: 1,843,195 km (0.068 R)
• M12: 2,370,528 km (0.113 R)
• M13: 2,492,151 km (0.098 R)
• M14: 2,796,433 km (0.109 R)
• M15: 3,074,984 km (0.103 R)
• M16: 3,801,132 km (0.077 R)
• M17: 3,903,308 km (0.083 R)
• M18: 4,047,969 km (0.09 R)
• M19: 4,342,677 km (0.046 R)
• M20: 4,688,098 km (0.029 R)
• M21: 4,997,766 km (0.117 R)
• M22: 5,544,396 km (0.103 R)
• M23: 5,801,405 km (0.084 R)
• M24: 5,990,796 km (0.09 R)
• M25: 6,303,007 km (0.102 R)
• M26: 6,645,287 km (0.07 R)
• M27: 6,843,504 km (0.081 R)
• M28: 7,170,076 km (0.088 R)
• M29: 7,373,529 km (0.11 R)
• M30: 7,501,585 km (0.093 R)
• M31: 7,604,658 km (0.086 R)
• M32: 8,021,737 km (0.088 R)
• M33: 8,286,226 km (0.1 R)
• M34: 8,769,577 km (0.099 R)
• M35: 9,207,001 km (0.034 R)
• M36: 9,400,581 km (0.106 R)
• M37: 9,763,804 km (0.061 R)
• M38: 10,074,669 km (0.116 R)
• M39: 10,160,089 km (0.114 R)
• M40: 10,968,516 km (0.043 R)
• M41: 12,038,290 km (0.104 R)
• M42: 12,159,315 km (0.091 R)
• M43: 13,048,225 km (0.092 R)
• M44: 13,234,774 km (0.112 R)
• M45: 13,390,805 km (0.051 R)
• M46: 13,610,414 km (0.086 R)
• M47: 13,736,525 km (0.077 R)
• M48: 13,862,935 km (0.104 R)
• M49: 14,212,546 km (0.084 R)
• M50: 14,436,643 km (0.069 R)
• M51: 14,629,625 km (0.091 R)
• M52: 14,823,503 km (0.114 R)
• M53: 16,606,261 km (0.1 R)
• M54: 16,943,754 km (0.114 R)
• M55: 17,045,481 km (0.085 R)
• M56: 17,625,771 km (0.082 R)
• M57: 18,455,889 km (0.09 R)
• M58: 19,051,738 km (0.114 R)
• M59: 19,547,206 km (0.112 R)
• M60: 19,689,473 km (0.086 R)
• M61: 19,796,436 km (0.1 R)
• M62: 20,804,277 km (0.056 R)
• M63: 21,168,248 km (0.108 R)
• M64: 21,902,475 km (0.087 R)
• M65: 22,235,629 km (0.085 R)
• M66: 22,607,829 km (0.097 R)
• M67: 22,719,877 km (0.037 R)
• M68: 23,057,071 km (0.116 R)
• M69: 23,509,305 km (0.095 R)
• M70: 23,698,696 km (0.109 R)
• M71: 24,231,414 km (0.118 R)
• M72: 24,845,214 km (0.044 R)
• M73: 25,192,730 km (0.089 R)
• M74: 25,425,205 km (0.103 R)
• M75: 25,619,683 km (0.097 R)

Planet 4 - Gas Giant

Semi-Major Axis: 5.42 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 565.9

Radius: 10.9

Gravity: 4.76 G

Time & Orbit

Eccentricity (e): 0.052

Orbit Range: 5.14 AU - 5.7 AU

Year: 8870 Days

Day: 13.5 Hours

Environment

Temp: -222 °C

Axial Tilt: 23.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 88,951,634 km

• M1: 139,276 km (0.12 R)
• M2: 319,092 km (0.065 R)
• M3: 491,728 km (0.081 R)
• M4: 669,301 km (0.119 R)
• M5: 902,075 km (0.041 R)
• M6: 1,125,126 km (0.112 R)
• M7: 1,271,582 km (0.09 R)
• M8: 1,405,173 km (0.052 R)
• M9: 1,707,510 km (0.054 R)
• M10: 1,791,734 km (0.061 R)
• M11: 1,942,528 km (0.08 R)
• M12: 2,097,811 km (0.055 R)
• M13: 2,257,133 km (0.058 R)
• M14: 2,326,696 km (0.112 R)
• M15: 2,959,794 km (0.102 R)
• M16: 3,061,969 km (0.117 R)
• M17: 3,243,431 km (0.093 R)
• M18: 3,401,856 km (0.104 R)
• M19: 3,617,277 km (0.112 R)
• M20: 4,004,885 km (0.105 R)
• M21: 4,175,127 km (0.083 R)
• M22: 4,970,988 km (0.115 R)
• M23: 5,685,467 km (0.106 R)
• M24: 6,867,739 km (0.092 R)
• M25: 7,909,539 km (0.117 R)
• M26: 9,411,800 km (0.089 R)
• M27: 10,214,842 km (0.083 R)
• M28: 10,409,319 km (0.117 R)
• M29: 10,604,993 km (0.105 R)
• M30: 11,000,081 km (0.1 R)
• M31: 11,561,223 km (0.091 R)
• M32: 11,886,149 km (0.12 R)
• M33: 12,503,390 km (0.119 R)
• M34: 12,586,566 km (0.108 R)
• M35: 12,836,993 km (0.104 R)
• M36: 13,004,842 km (0.091 R)
• M37: 13,385,120 km (0.119 R)
• M38: 13,555,362 km (0.086 R)
• M39: 14,810,937 km (0.083 R)
• M40: 15,031,295 km (0.1 R)
• M41: 16,375,432 km (0.113 R)
• M42: 17,108,012 km (0.092 R)
• M43: 18,557,616 km (0.091 R)
• M44: 19,561,866 km (0.057 R)
• M45: 20,192,421 km (0.112 R)
• M46: 20,387,796 km (0.081 R)
• M47: 21,076,395 km (0.092 R)
• M48: 21,373,945 km (0.1 R)
• M49: 21,672,842 km (0.104 R)
• M50: 22,984,067 km (0.111 R)
• M51: 23,546,555 km (0.116 R)
• M52: 24,113,531 km (0.04 R)
• M53: 24,217,053 km (0.11 R)
• M54: 24,580,725 km (0.095 R)
• M55: 24,893,983 km (0.092 R)
• M56: 25,735,471 km (0.049 R)
• M57: 25,841,387 km (0.083 R)
• M58: 26,053,516 km (0.094 R)
• M59: 27,069,136 km (0.051 R)
• M60: 27,934,410 km (0.072 R)
• M61: 28,479,844 km (0.056 R)
• M62: 28,863,712 km (0.053 R)
• M63: 32,968,229 km (0.118 R)
• M64: 36,179,048 km (0.061 R)
• M65: 36,416,460 km (0.077 R)
• M66: 37,791,414 km (0.079 R)
• M67: 38,273,718 km (0.081 R)
• M68: 38,818,703 km (0.083 R)
• M69: 39,000,913 km (0.097 R)
• M70: 39,366,231 km (0.086 R)
• M71: 41,086,008 km (0.065 R)

Planet 5 - Ice Giant

Semi-Major Axis: 8.04 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 555.3

Radius: 5

Gravity: 22.21 G

Time & Orbit

Eccentricity (e): 0.097

Orbit Range: 7.26 AU - 8.82 AU

Year: 16025 Days

Day: 16.8 Hours

Environment

Temp: -222 °C

Axial Tilt: 47.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 88,951,634 km

• M1: 132,693 km (0.097 R)
• M2: 275,410 km (0.117 R)
• M3: 318,494 km (0.073 R)
• M4: 379,829 km (0.099 R)
• M5: 1,317,957 km (0.091 R)
• M6: 1,995,636 km (0.12 R)
• M7: 2,384,590 km (0.108 R)
• M8: 2,509,055 km (0.092 R)
• M9: 2,667,629 km (0.038 R)
• M10: 3,508,070 km (0.082 R)
• M11: 4,160,018 km (0.098 R)
• M12: 4,615,094 km (0.107 R)
• M13: 4,848,617 km (0.095 R)
• M14: 5,046,086 km (0.088 R)
• M15: 5,125,821 km (0.114 R)
• M16: 5,408,262 km (0.073 R)
• M17: 5,613,062 km (0.091 R)
• M18: 6,030,290 km (0.103 R)
• M19: 6,414,308 km (0.085 R)
• M20: 6,718,440 km (0.069 R)
• M21: 7,027,360 km (0.086 R)
• M22: 7,431,274 km (0.102 R)
• M23: 8,879,382 km (0.07 R)
• M24: 9,120,982 km (0.117 R)
• M25: 10,158,892 km (0.093 R)
• M26: 10,411,563 km (0.102 R)
• M27: 10,513,140 km (0.105 R)
• M28: 11,705,435 km (0.111 R)
• M29: 11,917,116 km (0.05 R)
• M30: 12,344,367 km (0.098 R)
• M31: 12,667,948 km (0.052 R)
• M32: 13,544,741 km (0.084 R)
• M33: 14,046,492 km (0.093 R)
• M34: 14,158,840 km (0.101 R)
• M35: 14,215,089 km (0.07 R)
• M36: 14,724,918 km (0.086 R)
• M37: 15,937,559 km (0.114 R)
• M38: 16,054,694 km (0.101 R)
• M39: 17,846,128 km (0.106 R)
• M40: 17,967,901 km (0.097 R)
• M41: 19,888,588 km (0.12 R)
• M42: 20,394,827 km (0.045 R)
• M43: 20,522,135 km (0.078 R)
• M44: 21,033,610 km (0.112 R)
• M45: 21,355,395 km (0.12 R)
• M46: 21,873,602 km (0.107 R)
• M47: 22,922,583 km (0.097 R)
• M48: 23,121,099 km (0.057 R)
• M49: 23,386,635 km (0.076 R)
• M50: 23,519,777 km (0.093 R)
• M51: 23,786,809 km (0.079 R)
• M52: 24,526,421 km (0.106 R)
• M53: 24,933,028 km (0.083 R)
• M54: 25,684,309 km (0.043 R)
• M55: 25,821,640 km (0.078 R)
• M56: 28,762,584 km (0.08 R)
• M57: 30,127,366 km (0.074 R)
• M58: 30,635,550 km (0.09 R)
• M59: 33,818,543 km (0.06 R)
• M60: 34,346,474 km (0.101 R)
• M61: 35,029,389 km (0.059 R)
• M62: 36,331,488 km (0.068 R)
• M63: 36,485,724 km (0.103 R)
• M64: 36,562,916 km (0.097 R)
• M65: 37,027,268 km (0.11 R)
• M66: 37,415,624 km (0.119 R)
• M67: 40,012,942 km (0.095 R)
• M68: 40,252,000 km (0.033 R)
• M69: 40,411,471 km (0.101 R)
• M70: 40,571,391 km (0.09 R)
• M71: 44,634,021 km (0.107 R)
• M72: 44,716,599 km (0.117 R)
• M73: 45,130,087 km (0.068 R)
• M74: 45,295,991 km (0.04 R)
• M75: 46,211,381 km (0.106 R)
• M76: 46,462,107 km (0.12 R)
• M77: 47,217,127 km (0.098 R)
• M78: 47,469,648 km (0.1 R)
• M79: 48,569,193 km (0.086 R)
• M80: 48,738,986 km (0.103 R)
• M81: 49,164,592 km (0.118 R)
• M82: 49,676,965 km (0.068 R)
• M83: 50,277,002 km (0.094 R)
• M84: 50,793,264 km (0.11 R)
• M85: 50,879,433 km (0.078 R)
• M86: 52,613,721 km (0.107 R)
• M87: 54,015,004 km (0.109 R)
• M88: 54,367,307 km (0.112 R)
• M89: 55,251,281 km (0.11 R)
• M90: 55,872,860 km (0.07 R)
• M91: 58,201,800 km (0.116 R)

Planet 6 - Ice Giant

Semi-Major Axis: 9.85 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 927.1

Radius: 3

Gravity: 103.01 G

Time & Orbit

Eccentricity (e): 0.209

Orbit Range: 7.79 AU - 11.91 AU

Year: 21730 Days

Day: 24.3 Hours

Environment

Temp: -225 °C

Axial Tilt: 29.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (98)

Outer Limit: 88,951,634 km

• M1: 914,492 km (0.115 R)
• M2: 1,061,397 km (0.116 R)
• M3: 1,122,134 km (0.115 R)
• M4: 2,087,040 km (0.099 R)
• M5: 2,240,677 km (0.114 R)
• M6: 2,318,917 km (0.114 R)
• M7: 2,849,091 km (0.056 R)
• M8: 2,891,278 km (0.088 R)
• M9: 2,976,549 km (0.058 R)
• M10: 3,459,750 km (0.101 R)
• M11: 3,550,107 km (0.117 R)
• M12: 4,895,890 km (0.085 R)
• M13: 6,602,352 km (0.051 R)
• M14: 6,827,497 km (0.081 R)
• M15: 7,990,022 km (0.115 R)
• M16: 9,337,749 km (0.045 R)
• M17: 9,844,886 km (0.053 R)
• M18: 10,166,522 km (0.06 R)
• M19: 10,296,073 km (0.096 R)
• M20: 11,419,404 km (0.102 R)
• M21: 11,757,196 km (0.076 R)
• M22: 13,281,748 km (0.093 R)
• M23: 13,636,744 km (0.057 R)
• M24: 13,779,609 km (0.064 R)
• M25: 14,139,093 km (0.06 R)
• M26: 14,283,754 km (0.083 R)
• M27: 14,720,580 km (0.083 R)
• M28: 16,283,579 km (0.06 R)
• M29: 16,663,557 km (0.108 R)
• M30: 17,898,637 km (0.114 R)
• M31: 18,133,506 km (0.12 R)
• M32: 18,448,110 km (0.116 R)
• M33: 18,685,372 km (0.041 R)
• M34: 19,083,004 km (0.078 R)
• M35: 19,242,774 km (0.046 R)
• M36: 19,724,928 km (0.097 R)
• M37: 20,048,508 km (0.089 R)
• M38: 20,455,564 km (0.083 R)
• M39: 21,195,026 km (0.116 R)
• M40: 21,443,508 km (0.082 R)
• M41: 23,124,091 km (0.064 R)
• M42: 24,239,044 km (0.09 R)
• M43: 28,140,107 km (0.049 R)
• M44: 30,348,322 km (0.081 R)
• M45: 30,628,369 km (0.096 R)
• M46: 31,284,804 km (0.089 R)
• M47: 31,379,051 km (0.105 R)
• M48: 32,135,717 km (0.094 R)
• M49: 32,898,517 km (0.058 R)
• M50: 34,344,530 km (0.106 R)
• M51: 34,831,171 km (0.097 R)
• M52: 35,516,180 km (0.109 R)
• M53: 36,502,628 km (0.078 R)
• M54: 38,300,795 km (0.11 R)
• M55: 38,502,303 km (0.08 R)
• M56: 39,413,653 km (0.107 R)
• M57: 39,515,380 km (0.093 R)
• M58: 40,332,184 km (0.034 R)
• M59: 40,537,283 km (0.109 R)
• M60: 42,398,281 km (0.095 R)
• M61: 43,549,287 km (0.106 R)
• M62: 44,075,871 km (0.096 R)
• M63: 44,181,487 km (0.076 R)
• M64: 45,988,929 km (0.061 R)
• M65: 50,888,408 km (0.072 R)
• M66: 50,999,111 km (0.088 R)
• M67: 51,220,965 km (0.097 R)
• M68: 51,665,270 km (0.098 R)
• M69: 51,888,021 km (0.105 R)
• M70: 53,118,614 km (0.092 R)
• M71: 53,455,807 km (0.104 R)
• M72: 53,793,749 km (0.066 R)
• M73: 55,722,364 km (0.047 R)
• M74: 58,599,281 km (0.118 R)
• M75: 59,997,273 km (0.041 R)
• M76: 60,465,664 km (0.072 R)
• M77: 61,288,303 km (0.116 R)
• M78: 62,114,681 km (0.07 R)
• M79: 63,301,741 km (0.112 R)
• M80: 63,897,888 km (0.087 R)
• M81: 64,017,417 km (0.119 R)
• M82: 64,735,786 km (0.102 R)
• M83: 67,028,373 km (0.119 R)
• M84: 70,331,793 km (0.074 R)
• M85: 72,065,333 km (0.094 R)
• M86: 72,189,649 km (0.157 R)
• M87: 77,477,036 km (0.083 R)
• M88: 77,859,558 km (0.108 R)
• M89: 78,370,285 km (0.063 R)
• M90: 79,266,975 km (0.12 R)
• M91: 79,523,834 km (0.099 R)
• M92: 80,941,274 km (0.1 R)
• M93: 81,588,435 km (0.044 R)
• M94: 83,148,292 km (0.047 R)
• M95: 83,670,538 km (0.083 R)
• M96: 84,718,022 km (0.096 R)
• M97: 85,638,348 km (0.079 R)
• M98: 87,886,804 km (0.045 R)

Kuiper Belt

Range: 30 - 48 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 175 - 17,418 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit