🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.7 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 376.3

Radius: 14.6

Gravity: 1.77 G

Time & Orbit

Eccentricity (e): 0.214

Orbit Range: 0.55 AU - 0.85 AU

Year: 378 Days

Day: 5.4 Hours

Environment

Temp: -133 °C

Axial Tilt: 23.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (31)

Outer Limit: 91,363,315 km

• M1: 181,911 km (0.109 R)
• M2: 294,109 km (0.107 R)
• M3: 403,765 km (0.071 R)
• M4: 555,307 km (0.113 R)
• M5: 740,659 km (0.098 R)
• M6: 902,973 km (0.1 R)
• M7: 1,018,612 km (0.032 R)
• M8: 1,163,273 km (0.111 R)
• M9: 1,432,100 km (0.086 R)
• M10: 1,552,527 km (0.057 R)
• M11: 1,676,543 km (0.095 R)
• M12: 1,767,349 km (0.103 R)
• M13: 1,883,288 km (0.104 R)
• M14: 1,992,344 km (0.086 R)
• M15: 2,093,772 km (0.085 R)
• M16: 2,262,069 km (0.042 R)
• M17: 2,388,779 km (0.06 R)
• M18: 2,549,297 km (0.064 R)
• M19: 2,665,385 km (0.058 R)
• M20: 2,756,490 km (0.096 R)
• M21: 2,864,949 km (0.075 R)
• M22: 2,963,833 km (0.076 R)
• M23: 3,165,192 km (0.069 R)
• M24: 3,284,870 km (0.105 R)
• M25: 3,400,210 km (0.073 R)
• M26: 3,493,409 km (0.085 R)
• M27: 3,730,522 km (0.081 R)
• M28: 3,917,968 km (0.075 R)
• M29: 4,009,821 km (0.069 R)
• M30: 4,158,372 km (0.112 R)
• M31: 4,271,019 km (0.099 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.17 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 810.1

Radius: 14.9

Gravity: 3.65 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 0.92 AU - 1.42 AU

Year: 817 Days

Day: 14.1 Hours

Environment

Temp: -175 °C

Axial Tilt: 2.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 91,363,315 km

• M1: 187,596 km (0.099 R)
• M2: 293,062 km (0.086 R)
• M3: 517,459 km (0.079 R)
• M4: 629,059 km (0.092 R)
• M5: 750,981 km (0.092 R)
• M6: 900,130 km (0.089 R)
• M7: 1,016,218 km (0.099 R)
• M8: 1,137,991 km (0.1 R)
• M9: 1,265,149 km (0.076 R)
• M10: 1,390,512 km (0.064 R)
• M11: 1,549,834 km (0.095 R)
• M12: 1,895,555 km (0.049 R)
• M13: 2,000,124 km (0.116 R)
• M14: 2,115,015 km (0.071 R)
• M15: 2,508,906 km (0.088 R)
• M16: 2,642,497 km (0.047 R)
• M17: 2,963,833 km (0.077 R)
• M18: 3,067,355 km (0.033 R)
• M19: 3,288,161 km (0.104 R)
• M20: 3,584,215 km (0.086 R)
• M21: 3,684,895 km (0.095 R)
• M22: 3,827,462 km (0.114 R)
• M23: 3,971,823 km (0.041 R)
• M24: 4,170,789 km (0.03 R)
• M25: 4,373,195 km (0.119 R)
• M26: 4,600,733 km (0.094 R)
• M27: 4,699,468 km (0.117 R)
• M28: 4,876,741 km (0.09 R)
• M29: 5,101,587 km (0.095 R)
• M30: 5,215,281 km (0.068 R)
• M31: 5,410,506 km (0.03 R)
• M32: 5,514,926 km (0.107 R)
• M33: 5,608,275 km (0.081 R)
• M34: 6,288,945 km (0.104 R)
• M35: 6,645,437 km (0.107 R)
• M36: 6,744,919 km (0.11 R)
• M37: 7,122,654 km (0.097 R)
• M38: 7,275,692 km (0.086 R)
• M39: 7,378,317 km (0.114 R)
• M40: 7,481,390 km (0.08 R)
• M41: 7,702,196 km (0.048 R)
• M42: 7,806,765 km (0.117 R)
• M43: 8,070,506 km (0.081 R)
• M44: 8,216,813 km (0.089 R)
• M45: 8,539,046 km (0.091 R)
• M46: 8,633,892 km (0.074 R)
• M47: 8,742,649 km (0.1 R)
• M48: 8,865,619 km (0.098 R)
• M49: 9,113,203 km (0.04 R)
• M50: 9,335,206 km (0.09 R)
• M51: 9,474,931 km (0.11 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 338.4

Radius: 12.8

Gravity: 2.07 G

Time & Orbit

Eccentricity (e): 0.053

Orbit Range: 1.63 AU - 1.81 AU

Year: 1456 Days

Day: 5.3 Hours

Environment

Temp: -184 °C

Axial Tilt: 36 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 91,363,315 km

• M1: 159,471 km (0.056 R)
• M2: 261,048 km (0.101 R)
• M3: 401,820 km (0.084 R)
• M4: 648,956 km (0.059 R)
• M5: 795,711 km (0.067 R)
• M6: 896,091 km (0.039 R)
• M7: 1,035,068 km (0.087 R)
• M8: 1,181,823 km (0.098 R)
• M9: 1,396,646 km (0.107 R)
• M10: 1,624,633 km (0.095 R)
• M11: 1,706,164 km (0.062 R)
• M12: 1,899,295 km (0.1 R)
• M13: 2,270,746 km (0.11 R)
• M14: 2,409,124 km (0.06 R)
• M15: 2,588,642 km (0.081 R)
• M16: 2,753,050 km (0.105 R)
• M17: 2,960,991 km (0.099 R)
• M18: 3,133,178 km (0.086 R)
• M19: 3,225,779 km (0.112 R)
• M20: 3,403,202 km (0.097 R)
• M21: 3,616,080 km (0.088 R)
• M22: 3,800,534 km (0.119 R)
• M23: 3,899,418 km (0.1 R)
• M24: 3,988,130 km (0.095 R)
• M25: 4,201,606 km (0.096 R)
• M26: 4,604,772 km (0.096 R)
• M27: 4,698,570 km (0.106 R)
• M28: 4,864,624 km (0.111 R)
• M29: 4,948,249 km (0.053 R)
• M30: 5,032,472 km (0.12 R)
• M31: 5,177,882 km (0.119 R)
• M32: 5,287,986 km (0.119 R)
• M33: 5,398,838 km (0.086 R)
• M34: 5,786,446 km (0.115 R)
• M35: 5,926,320 km (0.095 R)
• M36: 6,028,645 km (0.097 R)
• M37: 6,352,374 km (0.083 R)
• M38: 6,668,624 km (0.115 R)
• M39: 6,842,008 km (0.103 R)
• M40: 6,963,033 km (0.107 R)
• M41: 7,371,435 km (0.101 R)
• M42: 7,481,689 km (0.092 R)
• M43: 7,606,453 km (0.088 R)
• M44: 8,297,446 km (0.066 R)
• M45: 8,426,698 km (0.113 R)
• M46: 8,570,911 km (0.118 R)
• M47: 9,171,097 km (0.084 R)
• M48: 9,815,266 km (0.07 R)
• M49: 10,227,109 km (0.065 R)
• M50: 10,350,228 km (0.085 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.21 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 148.1

Radius: 9.6

Gravity: 1.61 G

Time & Orbit

Eccentricity (e): 0.162

Orbit Range: 2.69 AU - 3.73 AU

Year: 3713 Days

Day: 13 Hours

Environment

Temp: -215 °C

Axial Tilt: 44.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 91,363,315 km

• M1: 128,056 km (0.055 R)
• M2: 199,863 km (0.101 R)
• M3: 294,259 km (0.116 R)
• M4: 386,561 km (0.067 R)
• M5: 446,699 km (0.098 R)
• M6: 510,877 km (0.097 R)
• M7: 606,769 km (0.045 R)
• M8: 1,036,564 km (0.057 R)
• M9: 1,161,927 km (0.098 R)
• M10: 1,254,677 km (0.119 R)
• M11: 1,507,947 km (0.094 R)
• M12: 1,724,564 km (0.119 R)
• M13: 1,820,456 km (0.115 R)
• M14: 1,962,275 km (0.071 R)
• M15: 2,085,245 km (0.032 R)
• M16: 2,676,456 km (0.096 R)
• M17: 3,120,013 km (0.093 R)
• M18: 3,198,402 km (0.115 R)
• M19: 3,277,540 km (0.042 R)
• M20: 3,343,812 km (0.113 R)
• M21: 3,491,614 km (0.06 R)
• M22: 3,655,125 km (0.072 R)
• M23: 3,751,765 km (0.096 R)
• M24: 3,877,278 km (0.093 R)
• M25: 4,032,560 km (0.104 R)
• M26: 4,146,853 km (0.103 R)
• M27: 4,276,554 km (0.119 R)
• M28: 4,363,919 km (0.112 R)
• M29: 4,437,222 km (0.12 R)
• M30: 4,584,876 km (0.104 R)
• M31: 4,749,134 km (0.088 R)
• M32: 5,300,701 km (0.09 R)
• M33: 5,489,195 km (0.112 R)
• M34: 5,808,137 km (0.117 R)
• M35: 6,297,921 km (0.114 R)
• M36: 6,480,879 km (0.092 R)
• M37: 6,631,823 km (0.107 R)
• M38: 6,716,196 km (0.113 R)
• M39: 6,937,302 km (0.069 R)
• M40: 7,023,022 km (0.075 R)
• M41: 7,562,172 km (0.118 R)
• M42: 7,810,056 km (0.091 R)
• M43: 7,917,168 km (0.113 R)
• M44: 8,259,298 km (0.115 R)
• M45: 8,368,505 km (0.113 R)
• M46: 8,588,115 km (0.099 R)
• M47: 8,698,667 km (0.045 R)
• M48: 8,809,669 km (0.117 R)
• M49: 8,884,019 km (0.112 R)
• M50: 9,051,868 km (0.114 R)
• M51: 9,657,291 km (0.109 R)
• M52: 10,003,610 km (0.092 R)
• M53: 10,081,101 km (0.104 R)
• M54: 10,217,385 km (0.09 R)
• M55: 10,708,515 km (0.111 R)
• M56: 10,867,388 km (0.108 R)
• M57: 10,947,123 km (0.041 R)
• M58: 11,816,287 km (0.117 R)
• M59: 12,001,040 km (0.096 R)
• M60: 12,124,758 km (0.114 R)
• M61: 12,290,363 km (0.069 R)
• M62: 12,791,665 km (0.05 R)
• M63: 13,129,607 km (0.109 R)
• M64: 13,257,064 km (0.037 R)
• M65: 13,342,185 km (0.111 R)
• M66: 13,663,372 km (0.076 R)
• M67: 13,835,858 km (0.1 R)
• M68: 13,900,634 km (0.1 R)
• M69: 14,030,485 km (0.118 R)
• M70: 14,117,401 km (0.109 R)
• M71: 14,510,545 km (0.103 R)
• M72: 14,774,585 km (0.087 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.03 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 21.5

Radius: 10.9

Gravity: 0.18 G

Time & Orbit

Eccentricity (e): 0.184

Orbit Range: 3.29 AU - 4.77 AU

Year: 5224 Days

Day: 10.3 Hours

Environment

Temp: -215 °C

Axial Tilt: 8.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (34)

Outer Limit: 91,363,315 km

• M1: 151,543 km (0.114 R)
• M2: 306,975 km (0.115 R)
• M3: 409,898 km (0.069 R)
• M4: 594,053 km (0.11 R)
• M5: 708,645 km (0.104 R)
• M6: 813,513 km (0.083 R)
• M7: 892,650 km (0.087 R)
• M8: 961,914 km (0.085 R)
• M9: 1,174,642 km (0.111 R)
• M10: 1,591,572 km (0.109 R)
• M11: 2,294,532 km (0.089 R)
• M12: 2,491,104 km (0.08 R)
• M13: 2,674,511 km (0.098 R)
• M14: 2,958,298 km (0.079 R)
• M15: 3,281,728 km (0.087 R)
• M16: 3,596,034 km (0.104 R)
• M17: 3,668,289 km (0.119 R)
• M18: 3,888,348 km (0.107 R)
• M19: 4,069,660 km (0.087 R)
• M20: 4,221,054 km (0.066 R)
• M21: 4,551,964 km (0.105 R)
• M22: 4,822,736 km (0.076 R)
• M23: 5,029,331 km (0.088 R)
• M24: 5,475,132 km (0.073 R)
• M25: 6,142,937 km (0.118 R)
• M26: 6,480,131 km (0.087 R)
• M27: 6,746,714 km (0.079 R)
• M28: 7,727,927 km (0.083 R)
• M29: 7,821,874 km (0.081 R)
• M30: 8,255,858 km (0.1 R)
• M31: 8,406,802 km (0.096 R)
• M32: 8,753,420 km (0.106 R)
• M33: 8,991,879 km (0.032 R)
• M34: 9,232,433 km (0.119 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.65 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 545.6

Radius: 5.5

Gravity: 18.04 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 6.39 AU - 8.91 AU

Year: 13662 Days

Day: 16.4 Hours

Environment

Temp: -218 °C

Axial Tilt: 38.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 91,363,315 km

• M1: 82,279 km (0.059 R)
• M2: 131,497 km (0.119 R)
• M3: 211,531 km (0.071 R)
• M4: 338,241 km (0.112 R)
• M5: 521,947 km (0.066 R)
• M6: 735,124 km (0.048 R)
• M7: 773,122 km (0.117 R)
• M8: 1,146,069 km (0.115 R)
• M9: 1,327,980 km (0.11 R)
• M10: 1,374,954 km (0.095 R)
• M11: 1,494,782 km (0.085 R)
• M12: 1,719,029 km (0.114 R)
• M13: 2,034,681 km (0.101 R)
• M14: 2,541,219 km (0.109 R)
• M15: 3,338,276 km (0.082 R)
• M16: 3,434,917 km (0.085 R)
• M17: 3,999,948 km (0.08 R)
• M18: 4,451,285 km (0.118 R)
• M19: 5,214,084 km (0.063 R)
• M20: 6,213,398 km (0.082 R)
• M21: 6,653,664 km (0.066 R)
• M22: 8,294,005 km (0.098 R)
• M23: 8,689,542 km (0.091 R)
• M24: 9,046,183 km (0.053 R)
• M25: 9,091,212 km (0.074 R)
• M26: 9,316,955 km (0.091 R)
• M27: 10,098,155 km (0.059 R)
• M28: 10,852,578 km (0.109 R)
• M29: 10,900,449 km (0.12 R)
• M30: 11,236,595 km (0.105 R)
• M31: 11,625,101 km (0.025 R)
• M32: 12,067,312 km (0.079 R)
• M33: 12,515,059 km (0.098 R)
• M34: 13,787,089 km (0.107 R)
• M35: 13,942,522 km (0.053 R)
• M36: 14,781,167 km (0.097 R)
• M37: 15,635,969 km (0.033 R)
• M38: 16,178,411 km (0.11 R)
• M39: 16,342,371 km (0.054 R)
• M40: 17,393,296 km (0.109 R)
• M41: 17,729,592 km (0.108 R)
• M42: 18,068,132 km (0.048 R)
• M43: 18,295,072 km (0.099 R)
• M44: 18,465,912 km (0.113 R)
• M45: 19,154,212 km (0.093 R)
• M46: 19,385,640 km (0.067 R)
• M47: 20,971,228 km (0.102 R)
• M48: 23,149,223 km (0.115 R)
• M49: 23,642,896 km (0.105 R)
• M50: 24,452,670 km (0.107 R)
• M51: 24,892,338 km (0.071 R)
• M52: 25,398,128 km (0.103 R)
• M53: 25,715,874 km (0.052 R)
• M54: 25,907,210 km (0.1 R)
• M55: 27,194,799 km (0.045 R)
• M56: 27,389,575 km (0.094 R)
• M57: 27,846,297 km (0.057 R)
• M58: 27,977,195 km (0.071 R)
• M59: 28,437,059 km (0.073 R)
• M60: 28,568,855 km (0.085 R)
• M61: 29,164,703 km (0.077 R)
• M62: 29,231,125 km (0.068 R)
• M63: 30,166,859 km (0.087 R)
• M64: 30,638,392 km (0.056 R)
• M65: 30,705,861 km (0.112 R)
• M66: 31,112,318 km (0.119 R)
• M67: 32,136,016 km (0.07 R)
• M68: 32,893,729 km (0.082 R)
• M69: 34,778,513 km (0.119 R)
• M70: 36,340,016 km (0.068 R)
• M71: 37,273,357 km (0.11 R)
• M72: 38,069,367 km (0.055 R)
• M73: 38,797,759 km (0.101 R)
• M74: 39,236,978 km (0.116 R)
• M75: 40,120,503 km (0.072 R)
• M76: 40,787,411 km (0.085 R)
• M77: 41,532,707 km (0.064 R)
• M78: 41,907,001 km (0.082 R)
• M79: 43,567,388 km (0.103 R)
• M80: 44,023,961 km (0.106 R)
• M81: 44,176,550 km (0.101 R)
• M82: 45,403,103 km (0.099 R)
• M83: 47,107,921 km (0.111 R)
• M84: 47,968,108 km (0.076 R)
• M85: 49,149,483 km (0.111 R)
• M86: 49,466,182 km (0.109 R)
• M87: 50,579,788 km (0.051 R)
• M88: 50,819,444 km (0.055 R)
• M89: 51,460,471 km (0.109 R)
• M90: 54,378,228 km (0.102 R)
• M91: 54,460,058 km (0.058 R)
• M92: 54,623,867 km (0.075 R)

Planet 7 - Ice Giant

Semi-Major Axis: 10.99 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 857.2

Radius: 7

Gravity: 17.49 G

Time & Orbit

Eccentricity (e): 0.036

Orbit Range: 10.59 AU - 11.39 AU

Year: 23524 Days

Day: 24.1 Hours

Environment

Temp: -232 °C

Axial Tilt: 22.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 91,363,315 km

• M1: 95,144 km (0.098 R)
• M2: 426,354 km (0.106 R)
• M3: 987,645 km (0.079 R)
• M4: 1,046,886 km (0.111 R)
• M5: 1,107,623 km (0.066 R)
• M6: 1,200,822 km (0.099 R)
• M7: 1,669,961 km (0.091 R)
• M8: 1,777,522 km (0.098 R)
• M9: 2,759,782 km (0.091 R)
• M10: 3,834,044 km (0.099 R)
• M11: 4,316,048 km (0.111 R)
• M12: 4,365,415 km (0.117 R)
• M13: 4,817,201 km (0.117 R)
• M14: 5,983,616 km (0.061 R)
• M15: 6,598,164 km (0.082 R)
• M16: 6,655,011 km (0.029 R)
• M17: 8,435,375 km (0.117 R)
• M18: 8,808,323 km (0.118 R)
• M19: 9,250,085 km (0.088 R)
• M20: 9,505,748 km (0.082 R)
• M21: 9,570,075 km (0.071 R)
• M22: 9,699,028 km (0.042 R)
• M23: 9,958,880 km (0.093 R)
• M24: 11,155,962 km (0.059 R)
• M25: 11,428,230 km (0.12 R)
• M26: 12,257,900 km (0.114 R)
• M27: 12,892,793 km (0.07 R)
• M28: 13,828,678 km (0.081 R)
• M29: 15,386,291 km (0.114 R)
• M30: 15,689,226 km (0.066 R)
• M31: 15,917,662 km (0.043 R)
• M32: 16,687,343 km (0.088 R)
• M33: 18,023,402 km (0.09 R)
• M34: 18,986,962 km (0.117 R)
• M35: 20,297,738 km (0.047 R)
• M36: 23,699,893 km (0.071 R)
• M37: 24,225,131 km (0.059 R)
• M38: 24,313,095 km (0.088 R)
• M39: 25,020,393 km (0.1 R)
• M40: 27,732,453 km (0.1 R)
• M41: 27,824,456 km (0.069 R)
• M42: 28,378,566 km (0.095 R)
• M43: 28,471,317 km (0.097 R)
• M44: 28,843,068 km (0.11 R)
• M45: 30,062,739 km (0.09 R)
• M46: 31,490,651 km (0.119 R)
• M47: 32,164,589 km (0.087 R)
• M48: 32,940,703 km (0.114 R)
• M49: 34,709,249 km (0.086 R)
• M50: 36,206,425 km (0.049 R)
• M51: 37,419,364 km (0.035 R)
• M52: 38,748,392 km (0.092 R)
• M53: 39,057,162 km (0.101 R)
• M54: 39,988,708 km (0.113 R)
• M55: 42,614,449 km (0.038 R)
• M56: 44,001,820 km (0.079 R)
• M57: 44,216,493 km (0.114 R)
• M58: 44,862,905 km (0.12 R)
• M59: 45,295,542 km (0.08 R)
• M60: 46,055,948 km (0.09 R)
• M61: 48,362,299 km (0.12 R)
• M62: 51,382,530 km (0.119 R)
• M63: 52,972,307 km (0.118 R)
• M64: 53,658,662 km (0.114 R)
• M65: 54,348,009 km (0.11 R)
• M66: 54,809,069 km (0.107 R)
• M67: 54,924,559 km (0.084 R)
• M68: 57,017,134 km (0.118 R)
• M69: 57,720,543 km (0.116 R)
• M70: 58,073,295 km (0.091 R)
• M71: 59,135,739 km (0.068 R)
• M72: 59,254,221 km (0.063 R)
• M73: 59,491,333 km (0.076 R)
• M74: 59,609,964 km (0.117 R)
• M75: 61,279,925 km (0.037 R)
• M76: 66,381,213 km (0.059 R)
• M77: 68,982,421 km (0.086 R)
• M78: 69,356,714 km (0.119 R)
• M79: 70,609,297 km (0.097 R)
• M80: 71,364,467 km (0.116 R)
• M81: 72,248,740 km (0.091 R)
• M82: 73,136,753 km (0.063 R)
• M83: 73,900,899 km (0.055 R)
• M84: 74,156,113 km (0.104 R)
• M85: 74,411,626 km (0.119 R)
• M86: 74,539,533 km (0.046 R)
• M87: 74,667,439 km (0.081 R)
• M88: 75,693,830 km (0.058 R)
• M89: 78,020,077 km (0.064 R)
• M90: 78,540,228 km (0.059 R)
• M91: 79,714,721 km (0.037 R)
• M92: 84,470,438 km (0.103 R)
• M93: 86,479,088 km (0.117 R)
• M94: 89,861,347 km (0.101 R)
• M95: 89,997,630 km (0.062 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: 309 - 13,001 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit