🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.99 AU

Composition

Type: Far Outer (Icy/Cometary)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 1.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 306.6

Radius: 14.9

Gravity: 1.38 G

Time & Orbit

Eccentricity (e): 0.052

Orbit Range: 1.88 AU - 2.08 AU

Year: 1923 Days

Day: 14.9 Hours

Environment

Temp: -196 °C

Axial Tilt: 33.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 45,182,161 km

• M1: 193,879 km (0.109 R)
• M2: 288,873 km (0.033 R)
• M3: 417,677 km (0.085 R)
• M4: 521,049 km (0.097 R)
• M5: 755,768 km (0.112 R)
• M6: 891,155 km (0.115 R)
• M7: 984,354 km (0.11 R)
• M8: 1,134,849 km (0.086 R)
• M9: 1,245,253 km (0.092 R)
• M10: 1,351,318 km (0.104 R)
• M11: 1,452,296 km (0.11 R)
• M12: 1,564,644 km (0.076 R)
• M13: 1,662,182 km (0.117 R)
• M14: 1,854,415 km (0.08 R)
• M15: 1,986,959 km (0.029 R)
• M16: 2,093,323 km (0.089 R)
• M17: 2,261,770 km (0.099 R)
• M18: 2,549,447 km (0.073 R)
• M19: 2,665,834 km (0.106 R)
• M20: 2,762,325 km (0.113 R)
• M21: 2,914,915 km (0.112 R)
• M22: 3,025,767 km (0.055 R)
• M23: 3,194,663 km (0.106 R)
• M24: 3,332,143 km (0.098 R)
• M25: 3,448,231 km (0.066 R)
• M26: 3,804,872 km (0.117 R)
• M27: 3,902,111 km (0.083 R)
• M28: 4,037,048 km (0.101 R)
• M29: 4,136,232 km (0.04 R)
• M30: 4,274,011 km (0.069 R)
• M31: 4,400,571 km (0.062 R)
• M32: 4,528,477 km (0.067 R)
• M33: 4,932,840 km (0.09 R)
• M34: 5,092,611 km (0.116 R)
• M35: 5,240,563 km (0.057 R)
• M36: 5,776,722 km (0.071 R)
• M37: 5,917,045 km (0.067 R)
• M38: 6,058,564 km (0.07 R)
• M39: 6,287,449 km (0.079 R)
• M40: 7,035,887 km (0.035 R)
• M41: 7,673,623 km (0.084 R)
• M42: 8,030,862 km (0.083 R)
• M43: 8,140,667 km (0.111 R)
• M44: 8,282,486 km (0.078 R)
• M45: 9,216,874 km (0.1 R)
• M46: 9,331,915 km (0.09 R)
• M47: 9,613,458 km (0.114 R)
• M48: 9,981,768 km (0.111 R)
• M49: 10,269,595 km (0.09 R)
• M50: 10,784,361 km (0.118 R)
• M51: 10,940,541 km (0.032 R)
• M52: 11,044,960 km (0.046 R)
• M53: 11,430,923 km (0.069 R)
• M54: 11,572,293 km (0.088 R)
• M55: 11,821,224 km (0.08 R)
• M56: 11,928,485 km (0.094 R)
• M57: 12,072,099 km (0.119 R)
• M58: 12,180,109 km (0.061 R)

Planet 2 - Gas Giant

Semi-Major Axis: 2.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 509.3

Radius: 8.9

Gravity: 6.43 G

Time & Orbit

Eccentricity (e): 0.108

Orbit Range: 1.92 AU - 2.38 AU

Year: 2176 Days

Day: 9.3 Hours

Environment

Temp: -202 °C

Axial Tilt: 21.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 45,182,161 km

• M1: 126,261 km (0.105 R)
• M2: 230,830 km (0.098 R)
• M3: 345,721 km (0.107 R)
• M4: 553,063 km (0.101 R)
• M5: 618,886 km (0.115 R)
• M6: 687,552 km (0.093 R)
• M7: 743,053 km (0.093 R)
• M8: 875,896 km (0.103 R)
• M9: 963,111 km (0.081 R)
• M10: 1,146,668 km (0.094 R)
• M11: 1,252,733 km (0.036 R)
• M12: 1,412,802 km (0.093 R)
• M13: 1,485,058 km (0.097 R)
• M14: 1,569,132 km (0.045 R)
• M15: 1,655,001 km (0.026 R)
• M16: 1,775,577 km (0.091 R)
• M17: 1,979,329 km (0.076 R)
• M18: 2,084,048 km (0.111 R)
• M19: 2,214,647 km (0.065 R)
• M20: 2,409,573 km (0.096 R)
• M21: 2,584,752 km (0.099 R)
• M22: 2,648,331 km (0.096 R)
• M23: 2,764,120 km (0.11 R)
• M24: 3,014,247 km (0.038 R)
• M25: 3,216,953 km (0.044 R)
• M26: 3,396,171 km (0.094 R)
• M27: 3,522,282 km (0.062 R)
• M28: 3,621,465 km (0.111 R)
• M29: 3,764,780 km (0.097 R)
• M30: 3,998,003 km (0.103 R)
• M31: 4,478,511 km (0.058 R)
• M32: 4,648,006 km (0.119 R)
• M33: 4,788,179 km (0.079 R)
• M34: 4,866,718 km (0.088 R)
• M35: 5,040,999 km (0.046 R)
• M36: 5,169,055 km (0.098 R)
• M37: 5,758,770 km (0.053 R)
• M38: 6,283,559 km (0.11 R)
• M39: 6,560,465 km (0.041 R)
• M40: 6,735,495 km (0.107 R)
• M41: 7,252,056 km (0.071 R)
• M42: 7,324,312 km (0.107 R)
• M43: 7,487,822 km (0.092 R)
• M44: 7,579,077 km (0.06 R)
• M45: 7,762,933 km (0.095 R)
• M46: 7,873,934 km (0.108 R)
• M47: 7,985,385 km (0.088 R)
• M48: 8,646,458 km (0.113 R)
• M49: 8,780,797 km (0.051 R)
• M50: 8,935,182 km (0.092 R)
• M51: 9,443,066 km (0.082 R)
• M52: 9,502,307 km (0.118 R)
• M53: 9,840,099 km (0.104 R)
• M54: 10,141,539 km (0.106 R)
• M55: 10,384,785 km (0.105 R)
• M56: 10,568,641 km (0.109 R)
• M57: 10,815,328 km (0.094 R)
• M58: 10,939,344 km (0.039 R)
• M59: 11,230,761 km (0.119 R)
• M60: 11,884,952 km (0.12 R)
• M61: 12,013,008 km (0.078 R)
• M62: 12,141,513 km (0.109 R)
• M63: 12,747,384 km (0.082 R)
• M64: 13,385,120 km (0.102 R)
• M65: 13,719,172 km (0.083 R)
• M66: 13,988,298 km (0.115 R)
• M67: 14,281,959 km (0.105 R)
• M68: 14,463,571 km (0.115 R)
• M69: 14,600,303 km (0.082 R)
• M70: 15,197,947 km (0.094 R)
• M71: 15,569,698 km (0.069 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.36 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 415.2

Radius: 10.9

Gravity: 3.49 G

Time & Orbit

Eccentricity (e): 0.061

Orbit Range: 2.22 AU - 2.5 AU

Year: 2503 Days

Day: 5.7 Hours

Environment

Temp: -216 °C

Axial Tilt: 49.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 45,182,161 km

• M1: 187,745 km (0.078 R)
• M2: 268,229 km (0.105 R)
• M3: 370,255 km (0.111 R)
• M4: 538,403 km (0.111 R)
• M5: 734,226 km (0.112 R)
• M6: 850,015 km (0.106 R)
• M7: 972,237 km (0.113 R)
• M8: 1,054,216 km (0.087 R)
• M9: 1,157,888 km (0.054 R)
• M10: 1,897,499 km (0.103 R)
• M11: 2,096,465 km (0.072 R)
• M12: 2,253,243 km (0.099 R)
• M13: 2,502,324 km (0.113 R)
• M14: 2,591,484 km (0.084 R)
• M15: 2,721,036 km (0.066 R)
• M16: 2,839,368 km (0.107 R)
• M17: 3,067,804 km (0.116 R)
• M18: 3,149,933 km (0.074 R)
• M19: 3,514,204 km (0.12 R)
• M20: 3,789,015 km (0.114 R)
• M21: 3,862,617 km (0.115 R)
• M22: 4,025,978 km (0.065 R)
• M23: 4,191,732 km (0.104 R)
• M24: 4,344,472 km (0.104 R)
• M25: 4,452,481 km (0.057 R)
• M26: 4,686,901 km (0.12 R)
• M27: 4,829,468 km (0.109 R)
• M28: 5,119,090 km (0.074 R)
• M29: 5,715,536 km (0.083 R)
• M30: 5,851,072 km (0.092 R)
• M31: 5,919,139 km (0.094 R)
• M32: 6,073,524 km (0.094 R)
• M33: 6,438,992 km (0.107 R)
• M34: 6,580,062 km (0.098 R)
• M35: 6,973,505 km (0.033 R)
• M36: 7,100,364 km (0.118 R)
• M37: 7,209,570 km (0.097 R)
• M38: 7,319,525 km (0.117 R)
• M39: 7,522,379 km (0.074 R)
• M40: 7,633,830 km (0.113 R)
• M41: 7,914,924 km (0.1 R)
• M42: 7,990,321 km (0.103 R)
• M43: 8,199,310 km (0.102 R)
• M44: 8,275,754 km (0.095 R)
• M45: 8,371,646 km (0.112 R)
• M46: 8,681,015 km (0.119 R)
• M47: 8,895,837 km (0.06 R)
• M48: 9,732,389 km (0.11 R)
• M49: 10,118,950 km (0.085 R)
• M50: 10,407,225 km (0.032 R)
• M51: 10,614,717 km (0.073 R)
• M52: 10,698,043 km (0.119 R)
• M53: 10,781,668 km (0.109 R)
• M54: 10,907,480 km (0.083 R)
• M55: 11,181,842 km (0.063 R)
• M56: 11,287,907 km (0.101 R)
• M57: 11,996,702 km (0.075 R)
• M58: 12,897,281 km (0.091 R)
• M59: 13,209,791 km (0.068 R)
• M60: 13,479,666 km (0.081 R)
• M61: 13,570,023 km (0.112 R)
• M62: 13,933,546 km (0.108 R)
• M63: 14,093,615 km (0.084 R)
• M64: 14,323,248 km (0.081 R)
• M65: 14,508,002 km (0.049 R)
• M66: 14,600,603 km (0.089 R)
• M67: 14,786,403 km (0.095 R)
• M68: 14,926,277 km (0.073 R)
• M69: 15,043,263 km (0.111 R)
• M70: 15,727,374 km (0.106 R)
• M71: 15,846,454 km (0.117 R)
• M72: 16,013,554 km (0.027 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 638.4

Radius: 9.4

Gravity: 7.22 G

Time & Orbit

Eccentricity (e): 0.156

Orbit Range: 3.33 AU - 4.55 AU

Year: 5398 Days

Day: 7.3 Hours

Environment

Temp: -219 °C

Axial Tilt: 18.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 45,182,161 km

• M1: 173,683 km (0.092 R)
• M2: 246,537 km (0.092 R)
• M3: 346,020 km (0.067 R)
• M4: 494,271 km (0.113 R)
• M5: 582,833 km (0.096 R)
• M6: 937,979 km (0.107 R)
• M7: 1,022,352 km (0.081 R)
• M8: 1,139,188 km (0.055 R)
• M9: 1,667,867 km (0.071 R)
• M10: 1,736,831 km (0.092 R)
• M11: 2,419,746 km (0.09 R)
• M12: 2,841,462 km (0.114 R)
• M13: 3,092,936 km (0.111 R)
• M14: 3,178,356 km (0.097 R)
• M15: 3,264,525 km (0.081 R)
• M16: 3,913,032 km (0.119 R)
• M17: 4,335,496 km (0.095 R)
• M18: 4,871,655 km (0.102 R)
• M19: 4,996,419 km (0.087 R)
• M20: 5,096,949 km (0.111 R)
• M21: 6,113,018 km (0.034 R)
• M22: 6,437,944 km (0.056 R)
• M23: 6,796,530 km (0.088 R)
• M24: 7,020,478 km (0.102 R)
• M25: 7,303,667 km (0.09 R)
• M26: 7,475,555 km (0.065 R)
• M27: 7,590,746 km (0.099 R)
• M28: 7,677,662 km (0.097 R)
• M29: 7,793,899 km (0.066 R)
• M30: 8,354,443 km (0.093 R)
• M31: 8,928,001 km (0.091 R)
• M32: 9,111,857 km (0.076 R)
• M33: 9,420,926 km (0.097 R)
• M34: 9,483,159 km (0.106 R)
• M35: 9,890,962 km (0.055 R)
• M36: 11,813,295 km (0.027 R)
• M37: 12,388,200 km (0.09 R)
• M38: 12,593,298 km (0.089 R)
• M39: 13,006,787 km (0.119 R)
• M40: 13,076,200 km (0.051 R)
• M41: 13,741,312 km (0.108 R)
• M42: 14,060,255 km (0.083 R)
• M43: 14,274,180 km (0.084 R)
• M44: 14,705,321 km (0.081 R)
• M45: 14,922,537 km (0.102 R)
• M46: 14,995,092 km (0.078 R)
• M47: 15,396,762 km (0.102 R)
• M48: 15,950,125 km (0.098 R)
• M49: 16,510,070 km (0.116 R)
• M50: 16,660,416 km (0.092 R)
• M51: 17,342,881 km (0.11 R)
• M52: 17,957,130 km (0.091 R)
• M53: 18,695,844 km (0.036 R)
• M54: 18,813,279 km (0.081 R)
• M55: 19,404,789 km (0.101 R)
• M56: 20,242,985 km (0.094 R)
• M57: 20,363,711 km (0.076 R)
• M58: 21,093,001 km (0.084 R)
• M59: 21,256,212 km (0.113 R)
• M60: 21,460,862 km (0.104 R)
• M61: 22,995,437 km (0.088 R)
• M62: 23,627,637 km (0.075 R)
• M63: 23,754,795 km (0.113 R)
• M64: 23,967,224 km (0.047 R)
• M65: 24,822,924 km (0.085 R)
• M66: 25,168,196 km (0.066 R)
• M67: 25,514,814 km (0.029 R)
• M68: 25,863,228 km (0.042 R)
• M69: 26,256,969 km (0.084 R)
• M70: 26,344,634 km (0.093 R)
• M71: 26,476,430 km (0.027 R)
• M72: 26,873,313 km (0.106 R)
• M73: 27,806,953 km (0.071 R)
• M74: 27,985,872 km (0.118 R)
• M75: 28,300,177 km (0.038 R)
• M76: 28,390,086 km (0.076 R)
• M77: 28,480,293 km (0.114 R)
• M78: 29,068,213 km (0.114 R)
• M79: 29,386,407 km (0.069 R)
• M80: 29,705,799 km (0.119 R)
• M81: 30,026,237 km (0.099 R)
• M82: 30,209,944 km (0.063 R)
• M83: 30,301,946 km (0.112 R)
• M84: 30,994,734 km (0.114 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 131.5

Radius: 14.8

Gravity: 0.6 G

Time & Orbit

Eccentricity (e): 0.061

Orbit Range: 4.78 AU - 5.4 AU

Year: 7927 Days

Day: 9.2 Hours

Environment

Temp: -229 °C

Axial Tilt: 7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 45,182,161 km

• M1: 197,768 km (0.065 R)
• M2: 379,081 km (0.118 R)
• M3: 538,104 km (0.112 R)
• M4: 735,872 km (0.092 R)
• M5: 927,208 km (0.096 R)
• M6: 1,064,838 km (0.068 R)
• M7: 1,247,646 km (0.081 R)
• M8: 1,349,672 km (0.11 R)
• M9: 1,618,051 km (0.112 R)
• M10: 1,758,972 km (0.1 R)
• M11: 2,176,499 km (0.05 R)
• M12: 2,285,855 km (0.112 R)
• M13: 2,510,402 km (0.098 R)
• M14: 2,725,524 km (0.082 R)
• M15: 2,981,635 km (0.045 R)
• M16: 3,121,360 km (0.054 R)
• M17: 3,480,843 km (0.104 R)
• M18: 3,891,938 km (0.056 R)
• M19: 3,987,531 km (0.114 R)
• M20: 4,598,339 km (0.092 R)
• M21: 4,801,792 km (0.118 R)
• M22: 5,008,238 km (0.116 R)
• M23: 5,710,450 km (0.104 R)
• M24: 5,819,507 km (0.105 R)
• M25: 5,973,443 km (0.1 R)
• M26: 6,173,455 km (0.05 R)
• M27: 6,285,654 km (0.06 R)
• M28: 6,580,212 km (0.112 R)
• M29: 6,694,804 km (0.092 R)
• M30: 6,879,557 km (0.115 R)
• M31: 6,972,458 km (0.09 R)
• M32: 7,325,060 km (0.114 R)
• M33: 7,587,305 km (0.114 R)
• M34: 7,683,347 km (0.1 R)
• M35: 7,876,926 km (0.091 R)
• M36: 8,170,288 km (0.056 R)
• M37: 8,268,873 km (0.043 R)
• M38: 8,642,119 km (0.09 R)
• M39: 9,225,401 km (0.052 R)
• M40: 10,216,936 km (0.117 R)
• M41: 10,403,186 km (0.072 R)
• M42: 10,563,854 km (0.088 R)
• M43: 11,297,033 km (0.11 R)
• M44: 11,434,663 km (0.078 R)
• M45: 12,300,236 km (0.115 R)
• M46: 13,681,922 km (0.041 R)
• M47: 13,887,619 km (0.12 R)
• M48: 14,630,373 km (0.026 R)
• M49: 14,991,502 km (0.09 R)
• M50: 15,325,105 km (0.077 R)
• M51: 16,061,725 km (0.106 R)
• M52: 16,154,476 km (0.081 R)
• M53: 16,527,872 km (0.053 R)
• M54: 17,030,072 km (0.053 R)
• M55: 17,696,830 km (0.086 R)
• M56: 18,566,741 km (0.08 R)
• M57: 18,761,967 km (0.04 R)
• M58: 19,088,838 km (0.084 R)
• M59: 19,285,858 km (0.06 R)
• M60: 19,417,654 km (0.086 R)
• M61: 19,781,476 km (0.087 R)
• M62: 20,818,937 km (0.115 R)
• M63: 21,123,519 km (0.106 R)
• M64: 21,327,420 km (0.106 R)
• M65: 21,531,921 km (0.025 R)
• M66: 22,287,240 km (0.06 R)
• M67: 22,633,559 km (0.049 R)
• M68: 22,772,536 km (0.105 R)
• M69: 23,436,750 km (0.092 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.3 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 808.8

Radius: 9.7

Gravity: 8.6 G

Time & Orbit

Eccentricity (e): 0.102

Orbit Range: 4.76 AU - 5.84 AU

Year: 8422 Days

Day: 14.6 Hours

Environment

Temp: -222 °C

Axial Tilt: 25.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 45,182,161 km

• M1: 288,125 km (0.093 R)
• M2: 536,458 km (0.029 R)
• M3: 609,462 km (0.067 R)
• M4: 782,846 km (0.071 R)
• M5: 867,368 km (0.11 R)
• M6: 1,027,737 km (0.099 R)
• M7: 1,198,129 km (0.03 R)
• M8: 1,440,029 km (0.069 R)
• M9: 1,610,271 km (0.077 R)
• M10: 2,064,451 km (0.104 R)
• M11: 2,506,363 km (0.079 R)
• M12: 2,582,957 km (0.067 R)
• M13: 2,923,890 km (0.109 R)
• M14: 3,031,601 km (0.107 R)
• M15: 3,911,685 km (0.067 R)
• M16: 4,962,012 km (0.094 R)
• M17: 5,156,040 km (0.089 R)
• M18: 5,352,612 km (0.079 R)
• M19: 6,094,617 km (0.07 R)
• M20: 6,407,426 km (0.058 R)
• M21: 6,618,958 km (0.096 R)
• M22: 6,690,017 km (0.071 R)
• M23: 8,662,913 km (0.113 R)
• M24: 8,818,794 km (0.084 R)
• M25: 9,331,466 km (0.088 R)
• M26: 9,894,553 km (0.098 R)
• M27: 10,262,264 km (0.117 R)
• M28: 10,676,202 km (0.106 R)
• M29: 10,843,302 km (0.048 R)
• M30: 11,264,869 km (0.06 R)
• M31: 11,349,841 km (0.107 R)
• M32: 12,561,584 km (0.062 R)
• M33: 13,004,393 km (0.12 R)
• M34: 13,542,347 km (0.063 R)
• M35: 13,723,361 km (0.082 R)
• M36: 14,363,041 km (0.1 R)
• M37: 14,732,997 km (0.06 R)
• M38: 14,825,897 km (0.062 R)
• M39: 14,919,096 km (0.072 R)
• M40: 15,435,060 km (0.101 R)
• M41: 16,100,172 km (0.119 R)
• M42: 16,532,659 km (0.118 R)
• M43: 17,360,085 km (0.064 R)
• M44: 17,754,126 km (0.033 R)
• M45: 17,902,527 km (0.053 R)
• M46: 18,200,825 km (0.103 R)
• M47: 18,450,653 km (0.12 R)
• M48: 19,614,525 km (0.085 R)
• M49: 20,025,021 km (0.101 R)
• M50: 20,438,211 km (0.11 R)
• M51: 20,906,452 km (0.063 R)
• M52: 22,868,428 km (0.101 R)
• M53: 23,246,163 km (0.077 R)
• M54: 23,844,105 km (0.077 R)
• M55: 24,172,323 km (0.116 R)
• M56: 24,999,450 km (0.119 R)
• M57: 25,388,554 km (0.043 R)
• M58: 26,116,647 km (0.086 R)
• M59: 26,285,543 km (0.091 R)
• M60: 26,908,319 km (0.056 R)
• M61: 27,995,446 km (0.06 R)
• M62: 28,515,299 km (0.104 R)
• M63: 30,805,044 km (0.071 R)
• M64: 32,122,552 km (0.091 R)
• M65: 32,970,473 km (0.067 R)
• M66: 33,825,874 km (0.109 R)
• M67: 33,948,544 km (0.062 R)
• M68: 35,184,671 km (0.096 R)
• M69: 35,808,195 km (0.087 R)
• M70: 35,995,940 km (0.115 R)
• M71: 37,573,450 km (0.067 R)
• M72: 38,915,941 km (0.084 R)
• M73: 41,188,034 km (0.073 R)
• M74: 43,103,186 km (0.081 R)
• M75: 43,369,470 km (0.056 R)
• M76: 43,770,243 km (0.076 R)
• M77: 44,507,910 km (0.115 R)
• M78: 44,642,548 km (0.102 R)
• M79: 45,047,060 km (0.112 R)

Kuiper Belt

Range: 30 - 57 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 171 - 13,190 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit