🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.31 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.62 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 249.6

Radius: 13.9

Gravity: 1.29 G

Time & Orbit

Eccentricity (e): 0.004

Orbit Range: 0.62 AU - 0.62 AU

Year: 326 Days

Day: 10.2 Hours

Environment

Temp: -148 °C

Axial Tilt: 3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (28)

Outer Limit: 43,387,407 km

• M1: 173,982 km (0.102 R)
• M2: 265,387 km (0.026 R)
• M3: 369,507 km (0.062 R)
• M4: 460,761 km (0.067 R)
• M5: 558,150 km (0.118 R)
• M6: 651,349 km (0.062 R)
• M7: 745,446 km (0.082 R)
• M8: 842,236 km (0.096 R)
• M9: 950,096 km (0.091 R)
• M10: 1,043,894 km (0.104 R)
• M11: 1,208,003 km (0.105 R)
• M12: 1,314,367 km (0.037 R)
• M13: 1,449,304 km (0.069 R)
• M14: 1,593,068 km (0.12 R)
• M15: 1,684,023 km (0.04 R)
• M16: 1,867,580 km (0.102 R)
• M17: 2,025,106 km (0.09 R)
• M18: 2,111,724 km (0.119 R)
• M19: 2,220,930 km (0.113 R)
• M20: 2,332,081 km (0.029 R)
• M21: 2,449,516 km (0.09 R)
• M22: 2,677,054 km (0.095 R)
• M23: 2,763,671 km (0.06 R)
• M24: 2,902,348 km (0.092 R)
• M25: 3,005,571 km (0.081 R)
• M26: 3,215,756 km (0.114 R)
• M27: 3,347,252 km (0.112 R)
• M28: 3,445,837 km (0.116 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.67 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 865.8

Radius: 10.5

Gravity: 7.85 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 0.65 AU - 0.69 AU

Year: 366 Days

Day: 12.2 Hours

Environment

Temp: -164 °C

Axial Tilt: 11.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (45)

Outer Limit: 43,387,407 km

• M1: 135,386 km (0.077 R)
• M2: 204,500 km (0.088 R)
• M3: 304,432 km (0.083 R)
• M4: 395,088 km (0.054 R)
• M5: 464,501 km (0.102 R)
• M6: 532,120 km (0.115 R)
• M7: 633,397 km (0.093 R)
• M8: 762,201 km (0.088 R)
• M9: 887,415 km (0.064 R)
• M10: 957,277 km (0.078 R)
• M11: 1,029,084 km (0.069 R)
• M12: 1,193,043 km (0.094 R)
• M13: 1,280,857 km (0.098 R)
• M14: 1,365,978 km (0.044 R)
• M15: 1,447,808 km (0.114 R)
• M16: 1,536,819 km (0.087 R)
• M17: 1,606,083 km (0.027 R)
• M18: 1,714,840 km (0.107 R)
• M19: 1,820,456 km (0.066 R)
• M20: 1,962,874 km (0.111 R)
• M21: 2,162,736 km (0.092 R)
• M22: 2,240,827 km (0.11 R)
• M23: 2,387,732 km (0.113 R)
• M24: 2,481,230 km (0.084 R)
• M25: 2,550,644 km (0.043 R)
• M26: 2,756,191 km (0.093 R)
• M27: 2,987,320 km (0.107 R)
• M28: 3,081,567 km (0.034 R)
• M29: 3,149,484 km (0.119 R)
• M30: 3,384,203 km (0.078 R)
• M31: 3,660,660 km (0.086 R)
• M32: 3,776,299 km (0.095 R)
• M33: 3,966,737 km (0.089 R)
• M34: 4,055,748 km (0.095 R)
• M35: 4,160,317 km (0.087 R)
• M36: 4,349,558 km (0.084 R)
• M37: 4,433,632 km (0.115 R)
• M38: 4,973,980 km (0.103 R)
• M39: 5,046,086 km (0.048 R)
• M40: 5,158,733 km (0.084 R)
• M41: 5,280,506 km (0.062 R)
• M42: 5,419,632 km (0.095 R)
• M43: 5,526,893 km (0.118 R)
• M44: 5,593,315 km (0.095 R)
• M45: 5,659,886 km (0.093 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.37 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 466.2

Radius: 8.4

Gravity: 6.61 G

Time & Orbit

Eccentricity (e): 0.089

Orbit Range: 1.25 AU - 1.49 AU

Year: 1069 Days

Day: 5 Hours

Environment

Temp: -187 °C

Axial Tilt: 21.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (65)

Outer Limit: 43,387,407 km

• M1: 116,836 km (0.116 R)
• M2: 215,870 km (0.099 R)
• M3: 282,142 km (0.086 R)
• M4: 366,664 km (0.057 R)
• M5: 524,640 km (0.101 R)
• M6: 580,889 km (0.104 R)
• M7: 655,687 km (0.047 R)
• M8: 711,338 km (0.116 R)
• M9: 845,976 km (0.094 R)
• M10: 938,427 km (0.062 R)
• M11: 1,027,887 km (0.107 R)
• M12: 1,195,287 km (0.114 R)
• M13: 1,364,333 km (0.059 R)
• M14: 1,422,377 km (0.119 R)
• M15: 1,533,827 km (0.102 R)
• M16: 1,725,911 km (0.08 R)
• M17: 1,844,991 km (0.109 R)
• M18: 1,917,845 km (0.032 R)
• M19: 2,016,430 km (0.086 R)
• M20: 2,150,619 km (0.102 R)
• M21: 2,253,094 km (0.084 R)
• M22: 2,357,363 km (0.06 R)
• M23: 2,472,105 km (0.099 R)
• M24: 2,543,762 km (0.072 R)
• M25: 2,597,917 km (0.102 R)
• M26: 2,725,673 km (0.075 R)
• M27: 2,808,999 km (0.034 R)
• M28: 2,883,798 km (0.106 R)
• M29: 3,064,064 km (0.033 R)
• M30: 3,141,106 km (0.115 R)
• M31: 3,209,024 km (0.082 R)
• M32: 3,287,264 km (0.117 R)
• M33: 3,576,436 km (0.067 R)
• M34: 3,873,837 km (0.065 R)
• M35: 3,946,841 km (0.077 R)
• M36: 4,147,152 km (0.08 R)
• M37: 4,254,115 km (0.056 R)
• M38: 4,307,820 km (0.076 R)
• M39: 4,394,437 km (0.108 R)
• M40: 4,470,583 km (0.076 R)
• M41: 4,591,159 km (0.061 R)
• M42: 5,038,905 km (0.091 R)
• M43: 5,221,863 km (0.099 R)
• M44: 5,465,558 km (0.055 R)
• M45: 5,524,051 km (0.037 R)
• M46: 6,169,715 km (0.086 R)
• M47: 6,402,490 km (0.11 R)
• M48: 6,675,805 km (0.104 R)
• M49: 6,776,185 km (0.071 R)
• M50: 6,978,292 km (0.041 R)
• M51: 7,092,884 km (0.101 R)
• M52: 7,220,940 km (0.094 R)
• M53: 7,285,267 km (0.069 R)
• M54: 7,583,714 km (0.084 R)
• M55: 7,872,887 km (0.082 R)
• M56: 8,098,780 km (0.08 R)
• M57: 8,286,376 km (0.052 R)
• M58: 8,462,004 km (0.085 R)
• M59: 8,543,385 km (0.089 R)
• M60: 8,707,194 km (0.106 R)
• M61: 8,775,561 km (0.094 R)
• M62: 8,968,392 km (0.116 R)
• M63: 9,037,656 km (0.096 R)
• M64: 9,218,370 km (0.071 R)
• M65: 9,344,182 km (0.116 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.5 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 622.3

Radius: 15

Gravity: 2.77 G

Time & Orbit

Eccentricity (e): 0.23

Orbit Range: 1.16 AU - 1.85 AU

Year: 1225 Days

Day: 7 Hours

Environment

Temp: -195 °C

Axial Tilt: 48.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (48)

Outer Limit: 43,387,407 km

• M1: 190,588 km (0.111 R)
• M2: 305,030 km (0.108 R)
• M3: 404,213 km (0.079 R)
• M4: 516,412 km (0.028 R)
• M5: 690,394 km (0.1 R)
• M6: 802,144 km (0.12 R)
• M7: 962,214 km (0.025 R)
• M8: 1,104,780 km (0.118 R)
• M9: 1,239,718 km (0.075 R)
• M10: 2,264,014 km (0.09 R)
• M11: 2,449,366 km (0.094 R)
• M12: 2,619,758 km (0.093 R)
• M13: 2,742,428 km (0.108 R)
• M14: 2,877,515 km (0.113 R)
• M15: 2,972,360 km (0.105 R)
• M16: 3,154,570 km (0.114 R)
• M17: 3,285,618 km (0.059 R)
• M18: 3,418,311 km (0.07 R)
• M19: 3,586,908 km (0.103 R)
• M20: 3,816,092 km (0.119 R)
• M21: 3,932,629 km (0.109 R)
• M22: 4,062,181 km (0.076 R)
• M23: 4,157,175 km (0.11 R)
• M24: 4,471,630 km (0.104 R)
• M25: 4,831,413 km (0.028 R)
• M26: 5,034,118 km (0.088 R)
• M27: 5,149,458 km (0.101 R)
• M28: 5,356,501 km (0.114 R)
• M29: 5,487,399 km (0.076 R)
• M30: 5,645,973 km (0.077 R)
• M31: 5,805,893 km (0.083 R)
• M32: 5,913,454 km (0.075 R)
• M33: 6,144,284 km (0.064 R)
• M34: 6,308,991 km (0.038 R)
• M35: 6,685,080 km (0.076 R)
• M36: 6,925,633 km (0.077 R)
• M37: 7,068,499 km (0.106 R)
• M38: 7,328,201 km (0.115 R)
• M39: 7,591,045 km (0.117 R)
• M40: 7,812,599 km (0.113 R)
• M41: 7,961,449 km (0.12 R)
• M42: 8,126,156 km (0.115 R)
• M43: 8,505,088 km (0.068 R)
• M44: 8,642,867 km (0.106 R)
• M45: 8,936,378 km (0.097 R)
• M46: 10,191,654 km (0.091 R)
• M47: 10,765,512 km (0.056 R)
• M48: 10,964,626 km (0.084 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.51 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 617

Radius: 13.8

Gravity: 3.24 G

Time & Orbit

Eccentricity (e): 0.036

Orbit Range: 2.42 AU - 2.6 AU

Year: 2652 Days

Day: 10 Hours

Environment

Temp: -213 °C

Axial Tilt: 21.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (66)

Outer Limit: 43,387,407 km

• M1: 174,730 km (0.103 R)
• M2: 306,376 km (0.089 R)
• M3: 499,956 km (0.108 R)
• M4: 608,115 km (0.094 R)
• M5: 806,632 km (0.119 R)
• M6: 900,430 km (0.101 R)
• M7: 1,174,194 km (0.119 R)
• M8: 1,383,481 km (0.104 R)
• M9: 1,475,484 km (0.072 R)
• M10: 1,653,954 km (0.037 R)
• M11: 1,827,338 km (0.034 R)
• M12: 2,059,364 km (0.094 R)
• M13: 2,356,316 km (0.082 R)
• M14: 2,992,107 km (0.05 R)
• M15: 3,082,913 km (0.068 R)
• M16: 3,439,853 km (0.083 R)
• M17: 3,599,325 km (0.116 R)
• M18: 3,826,714 km (0.11 R)
• M19: 3,992,019 km (0.102 R)
• M20: 4,092,399 km (0.042 R)
• M21: 4,485,243 km (0.044 R)
• M22: 4,730,285 km (0.106 R)
• M23: 4,943,910 km (0.052 R)
• M24: 5,492,187 km (0.053 R)
• M25: 5,983,167 km (0.092 R)
• M26: 6,079,209 km (0.111 R)
• M27: 6,272,938 km (0.12 R)
• M28: 6,508,106 km (0.119 R)
• M29: 6,706,323 km (0.099 R)
• M30: 7,088,396 km (0.118 R)
• M31: 7,190,122 km (0.108 R)
• M32: 7,664,647 km (0.1 R)
• M33: 7,769,066 km (0.09 R)
• M34: 7,916,271 km (0.069 R)
• M35: 8,085,466 km (0.072 R)
• M36: 8,470,830 km (0.106 R)
• M37: 8,774,663 km (0.065 R)
• M38: 9,038,105 km (0.106 R)
• M39: 9,126,368 km (0.111 R)
• M40: 9,393,250 km (0.057 R)
• M41: 9,482,859 km (0.087 R)
• M42: 9,662,676 km (0.052 R)
• M43: 9,912,056 km (0.075 R)
• M44: 10,048,938 km (0.049 R)
• M45: 10,140,492 km (0.035 R)
• M46: 10,278,421 km (0.04 R)
• M47: 10,625,937 km (0.075 R)
• M48: 10,859,758 km (0.059 R)
• M49: 11,190,070 km (0.09 R)
• M50: 11,452,016 km (0.087 R)
• M51: 11,571,694 km (0.059 R)
• M52: 11,739,992 km (0.12 R)
• M53: 13,190,643 km (0.085 R)
• M54: 13,416,984 km (0.119 R)
• M55: 13,568,527 km (0.081 R)
• M56: 13,898,839 km (0.116 R)
• M57: 14,052,177 km (0.078 R)
• M58: 14,206,263 km (0.094 R)
• M59: 15,115,369 km (0.104 R)
• M60: 15,325,853 km (0.089 R)
• M61: 15,669,928 km (0.103 R)
• M62: 15,803,070 km (0.117 R)
• M63: 16,636,181 km (0.097 R)
• M64: 17,428,601 km (0.081 R)
• M65: 18,010,088 km (0.096 R)
• M66: 18,710,654 km (0.093 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.39 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 663.5

Radius: 11.1

Gravity: 5.39 G

Time & Orbit

Eccentricity (e): 0.238

Orbit Range: 4.11 AU - 6.67 AU

Year: 8345 Days

Day: 13.8 Hours

Environment

Temp: -223 °C

Axial Tilt: 39.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 43,387,407 km

• M1: 173,833 km (0.107 R)
• M2: 412,441 km (0.058 R)
• M3: 578,645 km (0.112 R)
• M4: 800,648 km (0.102 R)
• M5: 1,050,775 km (0.097 R)
• M6: 1,121,834 km (0.099 R)
• M7: 1,543,252 km (0.096 R)
• M8: 1,666,670 km (0.081 R)
• M9: 1,836,314 km (0.052 R)
• M10: 1,923,380 km (0.109 R)
• M11: 2,011,942 km (0.072 R)
• M12: 2,101,850 km (0.065 R)
• M13: 2,670,172 km (0.111 R)
• M14: 2,794,488 km (0.114 R)
• M15: 2,895,317 km (0.099 R)
• M16: 2,971,762 km (0.104 R)
• M17: 3,179,104 km (0.109 R)
• M18: 3,690,579 km (0.085 R)
• M19: 3,998,601 km (0.06 R)
• M20: 4,112,595 km (0.048 R)
• M21: 4,820,043 km (0.048 R)
• M22: 5,064,187 km (0.078 R)
• M23: 5,219,021 km (0.054 R)
• M24: 5,789,138 km (0.109 R)
• M25: 6,016,228 km (0.056 R)
• M26: 6,312,581 km (0.077 R)
• M27: 9,112,754 km (0.105 R)
• M28: 10,421,137 km (0.096 R)
• M29: 10,777,330 km (0.041 R)
• M30: 11,379,910 km (0.072 R)
• M31: 11,952,122 km (0.095 R)
• M32: 12,366,658 km (0.119 R)
• M33: 13,252,427 km (0.107 R)
• M34: 13,337,847 km (0.076 R)
• M35: 13,681,473 km (0.083 R)
• M36: 13,897,642 km (0.068 R)
• M37: 13,984,559 km (0.096 R)
• M38: 14,995,840 km (0.073 R)
• M39: 15,803,669 km (0.081 R)
• M40: 16,350,150 km (0.105 R)
• M41: 16,717,861 km (0.056 R)
• M42: 16,949,140 km (0.108 R)
• M43: 17,274,665 km (0.038 R)
• M44: 17,555,310 km (0.096 R)
• M45: 18,026,394 km (0.031 R)
• M46: 18,121,239 km (0.095 R)
• M47: 18,597,259 km (0.115 R)
• M48: 18,693,002 km (0.09 R)
• M49: 19,077,618 km (0.115 R)
• M50: 19,562,016 km (0.05 R)
• M51: 19,659,404 km (0.094 R)
• M52: 20,148,589 km (0.094 R)
• M53: 20,542,929 km (0.06 R)
• M54: 22,807,841 km (0.091 R)
• M55: 23,373,620 km (0.102 R)
• M56: 23,787,857 km (0.12 R)
• M57: 24,152,427 km (0.048 R)
• M58: 26,216,877 km (0.082 R)
• M59: 27,134,361 km (0.099 R)
• M60: 27,242,969 km (0.047 R)
• M61: 28,062,466 km (0.075 R)
• M62: 28,889,892 km (0.116 R)
• M63: 29,000,894 km (0.118 R)
• M64: 29,557,697 km (0.03 R)
• M65: 30,005,743 km (0.071 R)
• M66: 30,908,416 km (0.082 R)
• M67: 31,135,506 km (0.109 R)
• M68: 31,306,197 km (0.096 R)
• M69: 32,279,331 km (0.064 R)
• M70: 32,567,456 km (0.102 R)
• M71: 33,611,650 km (0.101 R)
• M72: 34,490,088 km (0.049 R)
• M73: 35,316,916 km (0.105 R)
• M74: 36,389,532 km (0.091 R)
• M75: 37,896,881 km (0.096 R)
• M76: 39,056,264 km (0.108 R)
• M77: 39,609,327 km (0.076 R)
• M78: 40,351,034 km (0.037 R)
• M79: 40,537,133 km (0.111 R)
• M80: 40,847,998 km (0.08 R)
• M81: 41,034,846 km (0.045 R)
• M82: 41,284,524 km (0.115 R)
• M83: 41,659,865 km (0.087 R)

Planet 7 - Ice Giant

Semi-Major Axis: 6.58 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 401

Radius: 7.2

Gravity: 7.74 G

Time & Orbit

Eccentricity (e): 0.242

Orbit Range: 4.99 AU - 8.17 AU

Year: 11256 Days

Day: 25 Hours

Environment

Temp: -220 °C

Axial Tilt: 38.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 43,387,407 km

• M1: 96,640 km (0.116 R)
• M2: 240,553 km (0.042 R)
• M3: 462,257 km (0.112 R)
• M4: 678,726 km (0.068 R)
• M5: 774,169 km (0.116 R)
• M6: 1,162,525 km (0.085 R)
• M7: 1,219,821 km (0.084 R)
• M8: 1,317,508 km (0.12 R)
• M9: 1,479,373 km (0.112 R)
• M10: 1,889,421 km (0.049 R)
• M11: 1,934,600 km (0.079 R)
• M12: 2,680,794 km (0.083 R)
• M13: 2,886,641 km (0.106 R)
• M14: 3,618,922 km (0.085 R)
• M15: 3,675,470 km (0.084 R)
• M16: 3,846,610 km (0.068 R)
• M17: 4,466,394 km (0.109 R)
• M18: 4,557,350 km (0.077 R)
• M19: 5,212,139 km (0.119 R)
• M20: 5,534,224 km (0.118 R)
• M21: 5,796,618 km (0.073 R)
• M22: 6,063,052 km (0.074 R)
• M23: 7,062,216 km (0.12 R)
• M24: 7,817,386 km (0.065 R)
• M25: 8,000,943 km (0.11 R)
• M26: 8,148,746 km (0.068 R)
• M27: 8,260,196 km (0.053 R)
• M28: 9,054,860 km (0.091 R)
• M29: 9,637,394 km (0.096 R)
• M30: 10,112,068 km (0.054 R)
• M31: 10,392,564 km (0.093 R)
• M32: 10,473,197 km (0.105 R)
• M33: 10,797,675 km (0.114 R)
• M34: 11,249,161 km (0.081 R)
• M35: 11,456,504 km (0.045 R)
• M36: 12,812,908 km (0.077 R)
• M37: 13,247,041 km (0.106 R)
• M38: 13,996,227 km (0.118 R)
• M39: 14,668,819 km (0.093 R)
• M40: 14,713,998 km (0.112 R)
• M41: 14,804,504 km (0.062 R)
• M42: 14,940,639 km (0.041 R)
• M43: 15,720,193 km (0.08 R)
• M44: 15,812,794 km (0.105 R)
• M45: 16,278,492 km (0.069 R)
• M46: 17,702,215 km (0.077 R)
• M47: 19,413,016 km (0.046 R)
• M48: 19,961,592 km (0.118 R)
• M49: 20,464,690 km (0.07 R)
• M50: 20,870,100 km (0.087 R)
• M51: 20,971,826 km (0.102 R)
• M52: 21,637,537 km (0.029 R)
• M53: 22,154,248 km (0.08 R)
• M54: 22,258,069 km (0.085 R)
• M55: 22,674,998 km (0.102 R)
• M56: 23,147,129 km (0.117 R)
• M57: 23,675,658 km (0.046 R)
• M58: 24,101,264 km (0.084 R)
• M59: 24,154,521 km (0.073 R)
• M60: 24,798,241 km (0.103 R)
• M61: 24,852,096 km (0.032 R)
• M62: 25,067,966 km (0.038 R)
• M63: 26,652,207 km (0.102 R)
• M64: 26,707,409 km (0.093 R)
• M65: 27,039,516 km (0.073 R)
• M66: 28,212,363 km (0.037 R)
• M67: 29,230,826 km (0.111 R)
• M68: 30,088,769 km (0.109 R)
• M69: 30,318,851 km (0.1 R)
• M70: 30,376,446 km (0.087 R)
• M71: 30,723,064 km (0.1 R)
• M72: 31,129,073 km (0.057 R)
• M73: 31,420,190 km (0.099 R)
• M74: 31,887,833 km (0.08 R)
• M75: 32,122,403 km (0.098 R)
• M76: 32,239,987 km (0.08 R)
• M77: 32,889,092 km (0.085 R)
• M78: 33,304,376 km (0.081 R)
• M79: 34,080,340 km (0.105 R)
• M80: 34,620,986 km (0.118 R)
• M81: 35,164,475 km (0.107 R)
• M82: 35,589,034 km (0.118 R)
• M83: 35,649,921 km (0.116 R)
• M84: 37,057,936 km (0.112 R)
• M85: 39,801,860 km (0.1 R)
• M86: 41,006,721 km (0.076 R)
• M87: 41,902,214 km (0.088 R)
• M88: 43,257,571 km (0.115 R)

Kuiper Belt

Range: 30 - 58 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 557 - 16,708 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit