🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.5 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.97

Radius: 1.9

Gravity: 1.38 G

Time & Orbit

Eccentricity (e): 0.094

Orbit Range: 0.45 AU - 0.55 AU

Year: 159 Days

Day: 21.4 Hours

Environment

Temp: 11 °C

Axial Tilt: 0.1 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (2)

Outer Limit: 41,157,816 km

• M1: 309,668 km (0.109 R)
• M2: 476,020 km (0.116 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.52 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.87

Radius: 1.72

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.238

Orbit Range: 1.16 AU - 1.88 AU

Year: 843 Days

Day: 28.8 Hours

Environment

Temp: -97 °C

Axial Tilt: 10.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 41,157,816 km

• M1: 1,529,189 km (0.079 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.95 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.66

Radius: 1.68

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 1.67 AU - 2.23 AU

Year: 1224 Days

Day: 47.8 Hours

Environment

Temp: -123 °C

Axial Tilt: 35 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 3.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 210.6

Radius: 11.7

Gravity: 1.54 G

Time & Orbit

Eccentricity (e): 0.092

Orbit Range: 2.73 AU - 3.29 AU

Year: 2348 Days

Day: 11.6 Hours

Environment

Temp: -161 °C

Axial Tilt: 5.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (59)

Outer Limit: 41,157,816 km

• M1: 149,747 km (0.067 R)
• M2: 242,797 km (0.083 R)
• M3: 390,450 km (0.096 R)
• M4: 524,490 km (0.116 R)
• M5: 632,350 km (0.071 R)
• M6: 769,232 km (0.077 R)
• M7: 845,228 km (0.049 R)
• M8: 998,267 km (0.108 R)
• M9: 1,266,496 km (0.112 R)
• M10: 1,435,392 km (0.092 R)
• M11: 1,567,038 km (0.11 R)
• M12: 1,666,371 km (0.118 R)
• M13: 1,758,523 km (0.115 R)
• M14: 1,938,489 km (0.092 R)
• M15: 2,026,004 km (0.1 R)
• M16: 2,164,681 km (0.049 R)
• M17: 2,399,699 km (0.113 R)
• M18: 2,536,282 km (0.105 R)
• M19: 2,697,250 km (0.07 R)
• M20: 2,894,868 km (0.1 R)
• M21: 2,995,548 km (0.052 R)
• M22: 3,269,761 km (0.056 R)
• M23: 3,351,291 km (0.085 R)
• M24: 3,636,126 km (0.063 R)
• M25: 3,757,151 km (0.088 R)
• M26: 3,830,453 km (0.102 R)
• M27: 3,904,205 km (0.084 R)
• M28: 4,115,886 km (0.114 R)
• M29: 4,216,865 km (0.115 R)
• M30: 4,382,769 km (0.084 R)
• M31: 4,615,992 km (0.082 R)
• M32: 4,720,860 km (0.111 R)
• M33: 4,800,147 km (0.03 R)
• M34: 4,986,845 km (0.107 R)
• M35: 5,094,705 km (0.106 R)
• M36: 5,422,773 km (0.076 R)
• M37: 5,645,225 km (0.113 R)
• M38: 6,258,427 km (0.079 R)
• M39: 6,550,891 km (0.116 R)
• M40: 6,982,929 km (0.09 R)
• M41: 7,088,546 km (0.103 R)
• M42: 7,625,153 km (0.092 R)
• M43: 8,079,631 km (0.118 R)
• M44: 8,270,219 km (0.116 R)
• M45: 8,639,875 km (0.062 R)
• M46: 9,031,373 km (0.101 R)
• M47: 9,179,774 km (0.097 R)
• M48: 9,328,923 km (0.09 R)
• M49: 9,916,544 km (0.083 R)
• M50: 10,206,315 km (0.109 R)
• M51: 10,326,591 km (0.115 R)
• M52: 10,689,815 km (0.097 R)
• M53: 10,776,881 km (0.102 R)
• M54: 10,934,258 km (0.09 R)
• M55: 11,322,315 km (0.092 R)
• M56: 11,446,780 km (0.112 R)
• M57: 11,553,743 km (0.12 R)
• M58: 11,679,106 km (0.082 R)
• M59: 12,148,245 km (0.05 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.47 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 109.6

Radius: 8.3

Gravity: 1.59 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 5.08 AU - 5.86 AU

Year: 5752 Days

Day: 8 Hours

Environment

Temp: -175 °C

Axial Tilt: 12 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 41,157,816 km

• M1: 126,709 km (0.118 R)
• M2: 241,002 km (0.102 R)
• M3: 434,582 km (0.079 R)
• M4: 493,075 km (0.08 R)
• M5: 594,502 km (0.078 R)
• M6: 660,624 km (0.119 R)
• M7: 922,720 km (0.078 R)
• M8: 1,050,626 km (0.113 R)
• M9: 1,184,666 km (0.103 R)
• M10: 1,291,628 km (0.115 R)
• M11: 1,435,691 km (0.092 R)
• M12: 1,550,283 km (0.067 R)
• M13: 1,667,867 km (0.055 R)
• M14: 1,862,194 km (0.102 R)
• M15: 1,962,275 km (0.113 R)
• M16: 2,089,882 km (0.051 R)
• M17: 2,154,808 km (0.111 R)
• M18: 2,273,140 km (0.106 R)
• M19: 2,448,169 km (0.068 R)
• M20: 2,641,599 km (0.062 R)
• M21: 2,754,396 km (0.114 R)
• M22: 2,811,393 km (0.114 R)
• M23: 3,557,288 km (0.073 R)
• M24: 3,808,463 km (0.039 R)
• M25: 4,016,703 km (0.067 R)
• M26: 4,114,241 km (0.115 R)
• M27: 4,394,587 km (0.109 R)
• M28: 4,596,245 km (0.049 R)
• M29: 4,749,433 km (0.115 R)
• M30: 4,921,770 km (0.089 R)
• M31: 5,397,192 km (0.102 R)
• M32: 5,979,726 km (0.062 R)
• M33: 6,429,716 km (0.119 R)
• M34: 6,988,016 km (0.101 R)
• M35: 7,302,770 km (0.105 R)
• M36: 7,501,735 km (0.03 R)
• M37: 8,461,256 km (0.058 R)
• M38: 8,523,787 km (0.063 R)
• M39: 8,775,561 km (0.07 R)
• M40: 8,881,177 km (0.073 R)
• M41: 8,965,999 km (0.107 R)
• M42: 9,264,895 km (0.055 R)
• M43: 9,480,466 km (0.111 R)
• M44: 9,588,924 km (0.099 R)
• M45: 9,675,990 km (0.107 R)
• M46: 10,092,920 km (0.079 R)
• M47: 10,181,481 km (0.106 R)
• M48: 10,292,483 km (0.077 R)
• M49: 10,808,446 km (0.082 R)
• M50: 10,921,692 km (0.116 R)
• M51: 11,012,647 km (0.07 R)
• M52: 11,424,939 km (0.1 R)
• M53: 11,494,053 km (0.103 R)
• M54: 11,725,780 km (0.044 R)
• M55: 11,795,493 km (0.111 R)
• M56: 11,865,505 km (0.107 R)
• M57: 12,029,165 km (0.113 R)
• M58: 12,644,012 km (0.112 R)
• M59: 12,739,455 km (0.115 R)
• M60: 13,027,431 km (0.091 R)
• M61: 13,341,737 km (0.112 R)
• M62: 13,414,591 km (0.105 R)
• M63: 13,536,363 km (0.119 R)
• M64: 13,830,174 km (0.068 R)
• M65: 14,200,428 km (0.077 R)
• M66: 14,449,060 km (0.119 R)
• M67: 14,699,038 km (0.109 R)
• M68: 14,824,700 km (0.116 R)
• M69: 14,925,380 km (0.086 R)
• M70: 15,842,115 km (0.067 R)
• M71: 16,411,186 km (0.098 R)
• M72: 17,118,784 km (0.107 R)
• M73: 17,383,422 km (0.086 R)
• M74: 17,649,407 km (0.061 R)

Planet 6 - Gas Giant

Semi-Major Axis: 8.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 146.5

Radius: 10.9

Gravity: 1.23 G

Time & Orbit

Eccentricity (e): 0.056

Orbit Range: 8.32 AU - 9.3 AU

Year: 11757 Days

Day: 14.6 Hours

Environment

Temp: -206 °C

Axial Tilt: 36 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 41,157,816 km

• M1: 389,852 km (0.106 R)
• M2: 490,980 km (0.103 R)
• M3: 711,787 km (0.086 R)
• M4: 882,179 km (0.12 R)
• M5: 951,442 km (0.112 R)
• M6: 1,096,104 km (0.116 R)
• M7: 1,217,278 km (0.092 R)
• M8: 1,391,709 km (0.062 R)
• M9: 1,801,009 km (0.031 R)
• M10: 1,909,318 km (0.112 R)
• M11: 2,364,095 km (0.033 R)
• M12: 2,503,221 km (0.083 R)
• M13: 2,686,030 km (0.111 R)
• M14: 2,831,439 km (0.065 R)
• M15: 3,438,806 km (0.109 R)
• M16: 3,757,599 km (0.083 R)
• M17: 3,897,174 km (0.094 R)
• M18: 4,795,958 km (0.087 R)
• M19: 5,075,257 km (0.095 R)
• M20: 5,178,181 km (0.103 R)
• M21: 5,412,301 km (0.072 R)
• M22: 6,026,401 km (0.106 R)
• M23: 6,634,666 km (0.104 R)
• M24: 6,775,587 km (0.114 R)
• M25: 7,003,275 km (0.095 R)
• M26: 7,671,828 km (0.066 R)
• M27: 8,635,687 km (0.077 R)
• M28: 9,733,436 km (0.119 R)
• M29: 9,925,968 km (0.063 R)
• M30: 10,709,113 km (0.046 R)
• M31: 11,410,428 km (0.109 R)
• M32: 13,246,143 km (0.115 R)
• M33: 13,566,881 km (0.111 R)
• M34: 13,854,109 km (0.114 R)
• M35: 14,434,848 km (0.12 R)
• M36: 15,134,667 km (0.11 R)
• M37: 16,110,195 km (0.083 R)
• M38: 16,874,490 km (0.106 R)
• M39: 18,319,306 km (0.112 R)
• M40: 19,076,720 km (0.064 R)
• M41: 19,762,926 km (0.032 R)
• M42: 19,925,688 km (0.074 R)
• M43: 20,129,590 km (0.102 R)
• M44: 21,912,049 km (0.096 R)
• M45: 22,545,596 km (0.082 R)
• M46: 23,313,931 km (0.095 R)
• M47: 23,917,558 km (0.085 R)
• M48: 24,569,805 km (0.056 R)
• M49: 24,876,181 km (0.105 R)
• M50: 26,159,282 km (0.109 R)
• M51: 26,966,363 km (0.1 R)
• M52: 29,901,772 km (0.096 R)
• M53: 30,369,565 km (0.079 R)
• M54: 31,265,057 km (0.072 R)
• M55: 31,739,731 km (0.057 R)

Planet 7 - Ice Giant

Semi-Major Axis: 9.48 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 70.2

Radius: 7.7

Gravity: 1.18 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 7.82 AU - 11.14 AU

Year: 13123 Days

Day: 20.6 Hours

Environment

Temp: -192 °C

Axial Tilt: 10.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 41,157,816 km

• M1: 431,889 km (0.086 R)
• M2: 613,351 km (0.112 R)
• M3: 1,007,242 km (0.071 R)
• M4: 1,514,230 km (0.047 R)
• M5: 1,605,784 km (0.107 R)
• M6: 2,227,512 km (0.061 R)
• M7: 2,314,578 km (0.039 R)
• M8: 2,564,257 km (0.113 R)
• M9: 2,936,008 km (0.074 R)
• M10: 3,404,548 km (0.033 R)
• M11: 3,545,619 km (0.068 R)
• M12: 3,606,655 km (0.086 R)
• M13: 3,854,389 km (0.111 R)
• M14: 4,022,687 km (0.116 R)
• M15: 4,787,132 km (0.085 R)
• M16: 5,197,628 km (0.035 R)
• M17: 5,407,065 km (0.045 R)
• M18: 5,548,286 km (0.111 R)
• M19: 6,003,512 km (0.079 R)
• M20: 6,570,638 km (0.109 R)
• M21: 7,077,774 km (0.11 R)
• M22: 7,154,817 km (0.106 R)
• M23: 7,309,950 km (0.09 R)
• M24: 7,915,074 km (0.094 R)
• M25: 8,183,153 km (0.053 R)
• M26: 9,088,819 km (0.083 R)
• M27: 10,520,769 km (0.088 R)
• M28: 10,756,386 km (0.113 R)
• M29: 11,473,558 km (0.067 R)
• M30: 11,564,364 km (0.068 R)
• M31: 12,083,020 km (0.109 R)
• M32: 12,237,106 km (0.111 R)
• M33: 12,702,954 km (0.107 R)
• M34: 12,796,901 km (0.071 R)
• M35: 13,269,780 km (0.109 R)
• M36: 13,748,493 km (0.087 R)
• M37: 14,624,239 km (0.067 R)
• M38: 14,920,144 km (0.112 R)
• M39: 15,019,177 km (0.067 R)
• M40: 15,217,993 km (0.12 R)
• M41: 15,451,066 km (0.116 R)
• M42: 15,551,447 km (0.026 R)
• M43: 15,887,144 km (0.107 R)
• M44: 16,055,891 km (0.112 R)
• M45: 16,395,179 km (0.057 R)
• M46: 16,599,978 km (0.111 R)
• M47: 16,668,344 km (0.093 R)
• M48: 17,011,971 km (0.051 R)
• M49: 17,531,674 km (0.087 R)
• M50: 18,268,144 km (0.048 R)
• M51: 18,444,969 km (0.107 R)
• M52: 18,800,413 km (0.12 R)
• M53: 21,164,808 km (0.059 R)
• M54: 21,611,507 km (0.047 R)
• M55: 21,761,105 km (0.115 R)
• M56: 22,400,785 km (0.056 R)
• M57: 23,199,339 km (0.095 R)
• M58: 23,429,271 km (0.1 R)
• M59: 24,084,659 km (0.044 R)
• M60: 24,746,181 km (0.102 R)
• M61: 25,256,010 km (0.06 R)
• M62: 25,928,004 km (0.077 R)
• M63: 26,286,141 km (0.106 R)

Planet 8 - Ice Giant

Semi-Major Axis: 12.18 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 115.6

Radius: 7.6

Gravity: 2 G

Time & Orbit

Eccentricity (e): 0.087

Orbit Range: 11.12 AU - 13.24 AU

Year: 19111 Days

Day: 18.6 Hours

Environment

Temp: -198 °C

Axial Tilt: 28.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 41,157,816 km

• M1: 141,520 km (0.111 R)
• M2: 692,638 km (0.034 R)
• M3: 913,744 km (0.095 R)
• M4: 1,156,990 km (0.105 R)
• M5: 1,343,090 km (0.102 R)
• M6: 1,400,834 km (0.099 R)
• M7: 1,980,227 km (0.104 R)
• M8: 2,046,349 km (0.079 R)
• M9: 2,135,659 km (0.06 R)
• M10: 3,125,100 km (0.117 R)
• M11: 3,306,711 km (0.092 R)
• M12: 3,653,030 km (0.065 R)
• M13: 4,236,911 km (0.038 R)
• M14: 4,409,248 km (0.11 R)
• M15: 4,642,321 km (0.112 R)
• M16: 4,819,894 km (0.086 R)
• M17: 4,879,583 km (0.111 R)
• M18: 5,677,838 km (0.052 R)
• M19: 5,836,112 km (0.099 R)
• M20: 5,963,570 km (0.117 R)
• M21: 6,059,911 km (0.101 R)
• M22: 6,286,701 km (0.091 R)
• M23: 7,051,146 km (0.119 R)
• M24: 7,358,270 km (0.046 R)
• M25: 7,427,085 km (0.072 R)
• M26: 7,496,200 km (0.1 R)
• M27: 7,985,684 km (0.104 R)
• M28: 8,127,503 km (0.092 R)
• M29: 8,702,856 km (0.083 R)
• M30: 8,775,710 km (0.118 R)
• M31: 9,291,225 km (0.088 R)
• M32: 9,440,374 km (0.114 R)
• M33: 9,665,668 km (0.069 R)
• M34: 10,506,408 km (0.055 R)
• M35: 10,584,049 km (0.101 R)
• M36: 11,053,637 km (0.107 R)
• M37: 11,450,221 km (0.082 R)
• M38: 11,690,475 km (0.07 R)
• M39: 12,053,848 km (0.084 R)
• M40: 12,420,962 km (0.102 R)
• M41: 12,626,509 km (0.105 R)
• M42: 13,124,520 km (0.101 R)
• M43: 13,883,430 km (0.09 R)
• M44: 14,699,786 km (0.056 R)
• M45: 15,092,032 km (0.067 R)
• M46: 15,311,342 km (0.099 R)
• M47: 15,399,455 km (0.085 R)
• M48: 15,664,543 km (0.051 R)
• M49: 16,694,973 km (0.113 R)
• M50: 16,967,241 km (0.099 R)
• M51: 17,608,567 km (0.061 R)
• M52: 17,700,869 km (0.048 R)
• M53: 18,071,423 km (0.075 R)
• M54: 18,679,239 km (0.036 R)
• M55: 19,675,112 km (0.101 R)
• M56: 20,010,959 km (0.116 R)
• M57: 20,251,961 km (0.102 R)
• M58: 20,785,577 km (0.114 R)
• M59: 21,029,721 km (0.059 R)
• M60: 21,078,639 km (0.107 R)
• M61: 21,274,762 km (0.079 R)
• M62: 22,065,237 km (0.102 R)
• M63: 23,117,359 km (0.097 R)
• M64: 23,725,923 km (0.091 R)
• M65: 23,929,825 km (0.086 R)
• M66: 24,185,637 km (0.071 R)
• M67: 25,687,301 km (0.097 R)
• M68: 26,106,923 km (0.115 R)
• M69: 26,264,898 km (0.033 R)
• M70: 27,165,627 km (0.114 R)
• M71: 27,379,103 km (0.064 R)
• M72: 28,888,695 km (0.116 R)
• M73: 29,434,428 km (0.107 R)
• M74: 30,314,513 km (0.097 R)
• M75: 30,980,373 km (0.09 R)
• M76: 31,203,423 km (0.102 R)
• M77: 31,651,020 km (0.098 R)
• M78: 33,576,943 km (0.07 R)
• M79: 34,093,056 km (0.11 R)
• M80: 34,208,096 km (0.079 R)
• M81: 34,843,139 km (0.112 R)
• M82: 36,007,908 km (0.077 R)
• M83: 36,889,788 km (0.087 R)
• M84: 38,435,134 km (0.068 R)
• M85: 38,674,790 km (0.098 R)
• M86: 39,336,311 km (0.042 R)
• M87: 40,487,766 km (0.026 R)
• M88: 40,548,652 km (0.052 R)
• M89: 40,731,611 km (0.103 R)

Planet 9 - Ice Giant

Semi-Major Axis: 15.43 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 58.4

Radius: 4.7

Gravity: 2.64 G

Time & Orbit

Eccentricity (e): 0.2

Orbit Range: 12.34 AU - 18.52 AU

Year: 27250 Days

Day: 17.8 Hours

Environment

Temp: -210 °C

Axial Tilt: 39.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (57)

Outer Limit: 41,157,816 km

• M1: 327,619 km (0.092 R)
• M2: 723,904 km (0.119 R)
• M3: 1,076,955 km (0.091 R)
• M4: 1,261,858 km (0.113 R)
• M5: 1,319,304 km (0.051 R)
• M6: 1,377,647 km (0.045 R)
• M7: 2,007,155 km (0.058 R)
• M8: 2,990,162 km (0.043 R)
• M9: 3,302,373 km (0.041 R)
• M10: 3,355,331 km (0.087 R)
• M11: 3,516,148 km (0.118 R)
• M12: 3,570,303 km (0.104 R)
• M13: 3,734,561 km (0.119 R)
• M14: 4,562,286 km (0.094 R)
• M15: 4,830,515 km (0.081 R)
• M16: 5,073,013 km (0.097 R)
• M17: 5,444,465 km (0.099 R)
• M18: 5,665,122 km (0.033 R)
• M19: 6,311,684 km (0.106 R)
• M20: 6,677,151 km (0.107 R)
• M21: 6,777,980 km (0.065 R)
• M22: 7,083,758 km (0.073 R)
• M23: 7,743,635 km (0.117 R)
• M24: 8,063,176 km (0.061 R)
• M25: 8,459,460 km (0.075 R)
• M26: 9,047,081 km (0.096 R)
• M27: 9,534,321 km (0.062 R)
• M28: 10,261,516 km (0.115 R)
• M29: 11,285,364 km (0.073 R)
• M30: 13,811,773 km (0.107 R)
• M31: 13,983,212 km (0.049 R)
• M32: 14,026,296 km (0.1 R)
• M33: 14,285,250 km (0.075 R)
• M34: 14,720,281 km (0.094 R)
• M35: 15,159,650 km (0.106 R)
• M36: 16,548,965 km (0.05 R)
• M37: 17,051,614 km (0.107 R)
• M38: 17,281,845 km (0.072 R)
• M39: 18,072,021 km (0.05 R)
• M40: 19,494,996 km (0.066 R)
• M41: 21,397,881 km (0.041 R)
• M42: 22,245,802 km (0.091 R)
• M43: 22,396,596 km (0.082 R)
• M44: 22,699,083 km (0.076 R)
• M45: 26,806,742 km (0.11 R)
• M46: 28,044,814 km (0.03 R)
• M47: 28,807,613 km (0.102 R)
• M48: 30,912,006 km (0.112 R)
• M49: 31,248,751 km (0.063 R)
• M50: 33,352,396 km (0.101 R)
• M51: 34,799,307 km (0.105 R)
• M52: 35,091,173 km (0.052 R)
• M53: 36,681,248 km (0.115 R)
• M54: 36,740,639 km (0.097 R)
• M55: 38,716,677 km (0.094 R)
• M56: 40,420,297 km (0.095 R)
• M57: 40,726,973 km (0.111 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: 202 - 18,463 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit