🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 103.7

Radius: 13.4

Gravity: 0.58 G

Time & Orbit

Eccentricity (e): 0.148

Orbit Range: 0.69 AU - 0.93 AU

Year: 494 Days

Day: 8.5 Hours

Environment

Temp: -159 °C

Axial Tilt: 37.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 30,734,079 km

• M1: 223,499 km (0.116 R)
• M2: 334,501 km (0.089 R)
• M3: 455,226 km (0.092 R)
• M4: 554,111 km (0.106 R)
• M5: 664,963 km (0.114 R)
• M6: 773,421 km (0.036 R)
• M7: 868,116 km (0.107 R)
• M8: 991,983 km (0.118 R)
• M9: 1,109,418 km (0.11 R)
• M10: 1,218,475 km (0.069 R)
• M11: 1,469,799 km (0.06 R)
• M12: 1,601,894 km (0.076 R)
• M13: 1,792,482 km (0.097 R)
• M14: 1,954,646 km (0.11 R)
• M15: 2,076,418 km (0.095 R)
• M16: 2,297,973 km (0.088 R)
• M17: 2,422,588 km (0.077 R)
• M18: 2,585,051 km (0.067 R)
• M19: 2,678,849 km (0.043 R)
• M20: 2,764,718 km (0.078 R)
• M21: 2,930,173 km (0.08 R)
• M22: 3,392,431 km (0.039 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 271.1

Radius: 10.7

Gravity: 2.37 G

Time & Orbit

Eccentricity (e): 0.105

Orbit Range: 0.91 AU - 1.13 AU

Year: 699 Days

Day: 14.2 Hours

Environment

Temp: -185 °C

Axial Tilt: 3.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 30,734,079 km

• M1: 148,401 km (0.057 R)
• M2: 280,346 km (0.081 R)
• M3: 357,689 km (0.096 R)
• M4: 429,047 km (0.083 R)
• M5: 527,781 km (0.078 R)
• M6: 601,234 km (0.079 R)
• M7: 731,234 km (0.095 R)
• M8: 853,905 km (0.111 R)
• M9: 933,790 km (0.091 R)
• M10: 1,007,093 km (0.101 R)
• M11: 1,087,427 km (0.109 R)
• M12: 1,204,562 km (0.12 R)
• M13: 1,280,109 km (0.062 R)
• M14: 1,404,425 km (0.114 R)
• M15: 1,511,238 km (0.111 R)
• M16: 1,587,682 km (0.057 R)
• M17: 1,704,817 km (0.09 R)
• M18: 1,801,906 km (0.093 R)
• M19: 2,031,838 km (0.115 R)
• M20: 2,098,409 km (0.102 R)
• M21: 2,353,474 km (0.12 R)
• M22: 2,468,664 km (0.108 R)
• M23: 2,539,873 km (0.064 R)
• M24: 2,886,641 km (0.089 R)
• M25: 2,955,007 km (0.071 R)
• M26: 3,100,565 km (0.089 R)
• M27: 3,170,727 km (0.057 R)
• M28: 3,291,303 km (0.115 R)
• M29: 3,362,811 km (0.071 R)
• M30: 3,442,247 km (0.101 R)
• M31: 3,514,952 km (0.112 R)
• M32: 3,766,126 km (0.101 R)
• M33: 3,863,814 km (0.119 R)
• M34: 3,992,767 km (0.095 R)
• M35: 4,061,582 km (0.112 R)
• M36: 4,427,648 km (0.076 R)
• M37: 4,522,792 km (0.081 R)
• M38: 5,133,301 km (0.105 R)
• M39: 5,376,398 km (0.056 R)
• M40: 5,486,652 km (0.108 R)
• M41: 5,674,846 km (0.098 R)
• M42: 5,952,499 km (0.115 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.42 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 736.5

Radius: 14.1

Gravity: 3.7 G

Time & Orbit

Eccentricity (e): 0.064

Orbit Range: 1.33 AU - 1.51 AU

Year: 1148 Days

Day: 10.1 Hours

Environment

Temp: -183 °C

Axial Tilt: 22.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (59)

Outer Limit: 30,734,079 km

• M1: 177,273 km (0.06 R)
• M2: 266,733 km (0.116 R)
• M3: 400,623 km (0.107 R)
• M4: 547,379 km (0.065 R)
• M5: 741,856 km (0.105 R)
• M6: 920,027 km (0.057 R)
• M7: 1,128,716 km (0.082 R)
• M8: 1,394,402 km (0.083 R)
• M9: 1,715,888 km (0.113 R)
• M10: 1,804,599 km (0.118 R)
• M11: 1,894,807 km (0.071 R)
• M12: 1,996,084 km (0.109 R)
• M13: 2,185,026 km (0.075 R)
• M14: 2,360,206 km (0.088 R)
• M15: 2,459,688 km (0.036 R)
• M16: 2,560,667 km (0.109 R)
• M17: 2,683,636 km (0.083 R)
• M18: 3,075,583 km (0.107 R)
• M19: 3,195,859 km (0.036 R)
• M20: 3,407,092 km (0.088 R)
• M21: 3,611,741 km (0.085 R)
• M22: 3,703,894 km (0.056 R)
• M23: 4,116,933 km (0.118 R)
• M24: 4,213,424 km (0.089 R)
• M25: 4,347,464 km (0.081 R)
• M26: 4,482,850 km (0.079 R)
• M27: 4,619,732 km (0.102 R)
• M28: 4,796,108 km (0.112 R)
• M29: 4,884,969 km (0.089 R)
• M30: 5,129,412 km (0.082 R)
• M31: 5,430,702 km (0.047 R)
• M32: 5,778,218 km (0.091 R)
• M33: 5,968,506 km (0.094 R)
• M34: 6,271,592 km (0.078 R)
• M35: 6,383,192 km (0.085 R)
• M36: 6,679,096 km (0.078 R)
• M37: 6,778,728 km (0.047 R)
• M38: 6,921,893 km (0.1 R)
• M39: 7,037,233 km (0.11 R)
• M40: 7,211,515 km (0.047 R)
• M41: 7,328,500 km (0.113 R)
• M42: 7,416,614 km (0.066 R)
• M43: 7,505,026 km (0.118 R)
• M44: 7,608,697 km (0.115 R)
• M45: 7,877,525 km (0.08 R)
• M46: 7,982,991 km (0.028 R)
• M47: 8,424,754 km (0.067 R)
• M48: 8,765,238 km (0.081 R)
• M49: 8,858,887 km (0.089 R)
• M50: 9,126,069 km (0.087 R)
• M51: 9,252,628 km (0.076 R)
• M52: 9,523,849 km (0.109 R)
• M53: 9,829,926 km (0.105 R)
• M54: 9,976,084 km (0.093 R)
• M55: 10,073,921 km (0.084 R)
• M56: 10,188,513 km (0.106 R)
• M57: 10,667,675 km (0.099 R)
• M58: 10,918,550 km (0.096 R)
• M59: 11,425,986 km (0.081 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 413

Radius: 14.6

Gravity: 1.94 G

Time & Orbit

Eccentricity (e): 0.156

Orbit Range: 3.17 AU - 4.34 AU

Year: 4925 Days

Day: 12.6 Hours

Environment

Temp: -223 °C

Axial Tilt: 10.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 30,734,079 km

• M1: 274,811 km (0.104 R)
• M2: 478,863 km (0.116 R)
• M3: 606,769 km (0.113 R)
• M4: 706,850 km (0.081 R)
• M5: 892,650 km (0.066 R)
• M6: 1,210,845 km (0.092 R)
• M7: 1,329,775 km (0.092 R)
• M8: 1,623,586 km (0.089 R)
• M9: 1,786,199 km (0.067 R)
• M10: 1,877,304 km (0.066 R)
• M11: 2,290,942 km (0.078 R)
• M12: 2,629,033 km (0.068 R)
• M13: 3,074,535 km (0.052 R)
• M14: 3,203,638 km (0.094 R)
• M15: 3,372,385 km (0.101 R)
• M16: 3,836,886 km (0.055 R)
• M17: 3,956,415 km (0.069 R)
• M18: 4,280,893 km (0.112 R)
• M19: 4,446,498 km (0.058 R)
• M20: 5,152,450 km (0.078 R)
• M21: 5,373,256 km (0.077 R)
• M22: 5,801,705 km (0.109 R)
• M23: 6,358,957 km (0.12 R)
• M24: 6,620,005 km (0.044 R)
• M25: 6,981,882 km (0.078 R)
• M26: 7,350,342 km (0.105 R)
• M27: 7,574,439 km (0.109 R)
• M28: 8,106,409 km (0.108 R)
• M29: 8,702,856 km (0.072 R)
• M30: 8,887,310 km (0.091 R)
• M31: 9,610,616 km (0.098 R)
• M32: 9,746,750 km (0.091 R)
• M33: 10,048,339 km (0.078 R)
• M34: 10,158,743 km (0.079 R)
• M35: 10,297,420 km (0.099 R)
• M36: 11,199,645 km (0.076 R)
• M37: 11,400,405 km (0.065 R)
• M38: 12,422,009 km (0.09 R)
• M39: 12,659,720 km (0.117 R)
• M40: 12,869,007 km (0.034 R)
• M41: 13,625,524 km (0.066 R)
• M42: 14,179,185 km (0.077 R)
• M43: 14,334,318 km (0.075 R)
• M44: 14,521,316 km (0.115 R)
• M45: 15,916,615 km (0.09 R)
• M46: 16,045,568 km (0.115 R)
• M47: 16,467,135 km (0.102 R)
• M48: 16,761,245 km (0.086 R)
• M49: 16,991,027 km (0.106 R)
• M50: 17,887,567 km (0.069 R)
• M51: 18,055,266 km (0.093 R)
• M52: 18,867,732 km (0.102 R)
• M53: 18,970,057 km (0.103 R)
• M54: 19,141,197 km (0.099 R)
• M55: 19,381,451 km (0.09 R)
• M56: 19,484,823 km (0.059 R)
• M57: 19,588,345 km (0.09 R)
• M58: 19,761,280 km (0.099 R)
• M59: 20,038,934 km (0.089 R)
• M60: 20,387,946 km (0.054 R)
• M61: 20,738,902 km (0.087 R)
• M62: 21,482,553 km (0.073 R)
• M63: 21,696,628 km (0.06 R)
• M64: 21,839,793 km (0.06 R)
• M65: 22,090,968 km (0.056 R)
• M66: 22,271,084 km (0.109 R)
• M67: 22,523,904 km (0.11 R)
• M68: 22,813,974 km (0.096 R)
• M69: 23,068,889 km (0.1 R)
• M70: 24,098,123 km (0.11 R)
• M71: 24,618,274 km (0.107 R)
• M72: 24,879,771 km (0.054 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 539.2

Radius: 15

Gravity: 2.4 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 3.08 AU - 4.68 AU

Year: 5184 Days

Day: 10.2 Hours

Environment

Temp: -213 °C

Axial Tilt: 26.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 30,734,079 km

• M1: 219,310 km (0.059 R)
• M2: 413,489 km (0.102 R)
• M3: 513,270 km (0.11 R)
• M4: 757,713 km (0.036 R)
• M5: 877,242 km (0.083 R)
• M6: 1,138,141 km (0.113 R)
• M7: 1,531,733 km (0.086 R)
• M8: 1,656,946 km (0.11 R)
• M9: 1,769,294 km (0.106 R)
• M10: 1,951,504 km (0.043 R)
• M11: 2,192,806 km (0.097 R)
• M12: 2,610,932 km (0.095 R)
• M13: 3,054,639 km (0.107 R)
• M14: 3,480,843 km (0.094 R)
• M15: 3,883,112 km (0.079 R)
• M16: 4,078,936 km (0.044 R)
• M17: 4,300,490 km (0.071 R)
• M18: 5,083,635 km (0.107 R)
• M19: 5,226,501 km (0.08 R)
• M20: 5,516,272 km (0.094 R)
• M21: 5,614,109 km (0.072 R)
• M22: 5,911,061 km (0.09 R)
• M23: 6,417,449 km (0.065 R)
• M24: 6,624,044 km (0.051 R)
• M25: 7,043,816 km (0.081 R)
• M26: 7,150,030 km (0.08 R)
• M27: 7,364,254 km (0.049 R)
• M28: 7,662,403 km (0.117 R)
• M29: 7,771,759 km (0.109 R)
• M30: 7,964,591 km (0.084 R)
• M31: 8,103,268 km (0.081 R)
• M32: 8,214,718 km (0.078 R)
• M33: 8,980,809 km (0.058 R)
• M34: 9,769,788 km (0.104 R)
• M35: 9,978,028 km (0.108 R)
• M36: 10,825,650 km (0.075 R)
• M37: 11,072,038 km (0.089 R)
• M38: 11,664,894 km (0.105 R)
• M39: 11,822,720 km (0.091 R)
• M40: 11,917,714 km (0.102 R)
• M41: 12,140,316 km (0.118 R)
• M42: 12,268,073 km (0.087 R)
• M43: 12,622,021 km (0.102 R)
• M44: 12,914,186 km (0.1 R)
• M45: 13,241,356 km (0.092 R)
• M46: 13,438,975 km (0.056 R)
• M47: 13,803,844 km (0.1 R)
• M48: 14,104,835 km (0.046 R)
• M49: 14,239,324 km (0.111 R)
• M50: 14,645,332 km (0.091 R)
• M51: 14,815,575 km (0.096 R)
• M52: 17,089,014 km (0.063 R)
• M53: 17,196,574 km (0.051 R)
• M54: 17,846,577 km (0.086 R)
• M55: 19,581,613 km (0.102 R)
• M56: 19,807,057 km (0.055 R)
• M57: 20,602,619 km (0.104 R)
• M58: 20,908,546 km (0.112 R)
• M59: 21,370,056 km (0.101 R)
• M60: 21,796,260 km (0.064 R)
• M61: 22,186,112 km (0.106 R)
• M62: 22,460,325 km (0.114 R)
• M63: 22,578,208 km (0.049 R)
• M64: 22,893,561 km (0.081 R)
• M65: 23,329,638 km (0.112 R)
• M66: 24,857,033 km (0.068 R)
• M67: 25,632,847 km (0.053 R)
• M68: 25,961,813 km (0.09 R)
• M69: 26,085,680 km (0.053 R)
• M70: 26,250,986 km (0.093 R)
• M71: 26,375,152 km (0.117 R)
• M72: 26,499,617 km (0.07 R)
• M73: 26,624,232 km (0.063 R)
• M74: 27,166,375 km (0.069 R)
• M75: 27,881,004 km (0.051 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.55 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 804.4

Radius: 14.8

Gravity: 3.67 G

Time & Orbit

Eccentricity (e): 0.069

Orbit Range: 4.24 AU - 4.86 AU

Year: 6583 Days

Day: 11.4 Hours

Environment

Temp: -228 °C

Axial Tilt: 14.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 30,734,079 km

• M1: 222,153 km (0.115 R)
• M2: 325,675 km (0.082 R)
• M3: 466,147 km (0.092 R)
• M4: 743,801 km (0.055 R)
• M5: 935,136 km (0.108 R)
• M6: 1,178,233 km (0.119 R)
• M7: 1,316,910 km (0.087 R)
• M8: 1,611,468 km (0.061 R)
• M9: 1,846,935 km (0.056 R)
• M10: 2,073,127 km (0.114 R)
• M11: 2,783,119 km (0.066 R)
• M12: 2,972,061 km (0.11 R)
• M13: 3,092,487 km (0.06 R)
• M14: 3,263,777 km (0.106 R)
• M15: 3,539,336 km (0.071 R)
• M16: 3,641,661 km (0.034 R)
• M17: 3,770,764 km (0.043 R)
• M18: 4,060,385 km (0.066 R)
• M19: 4,275,806 km (0.104 R)
• M20: 4,384,863 km (0.119 R)
• M21: 5,408,711 km (0.087 R)
• M22: 5,527,043 km (0.089 R)
• M23: 6,379,302 km (0.057 R)
• M24: 6,662,192 km (0.096 R)
• M25: 7,700,999 km (0.093 R)
• M26: 7,901,460 km (0.103 R)
• M27: 8,478,759 km (0.04 R)
• M28: 9,566,784 km (0.059 R)
• M29: 9,710,398 km (0.085 R)
• M30: 10,587,191 km (0.111 R)
• M31: 10,959,989 km (0.091 R)
• M32: 12,026,921 km (0.064 R)
• M33: 12,220,949 km (0.084 R)
• M34: 12,533,609 km (0.108 R)
• M35: 13,447,203 km (0.039 R)
• M36: 13,648,711 km (0.064 R)
• M37: 13,810,576 km (0.046 R)
• M38: 14,095,411 km (0.062 R)
• M39: 14,753,940 km (0.106 R)
• M40: 14,878,555 km (0.096 R)
• M41: 15,633,426 km (0.039 R)
• M42: 15,930,378 km (0.106 R)
• M43: 16,058,135 km (0.101 R)
• M44: 16,357,779 km (0.094 R)
• M45: 17,443,112 km (0.093 R)
• M46: 17,663,021 km (0.108 R)
• M47: 17,795,265 km (0.094 R)
• M48: 18,194,392 km (0.108 R)
• M49: 18,506,902 km (0.06 R)
• M50: 19,500,382 km (0.11 R)
• M51: 19,774,445 km (0.054 R)
• M52: 21,210,285 km (0.099 R)
• M53: 21,633,498 km (0.05 R)
• M54: 22,202,119 km (0.109 R)
• M55: 22,488,150 km (0.059 R)
• M56: 22,583,893 km (0.097 R)
• M57: 22,967,911 km (0.118 R)
• M58: 23,790,998 km (0.034 R)
• M59: 24,969,680 km (0.091 R)
• M60: 25,866,070 km (0.12 R)
• M61: 27,587,942 km (0.078 R)
• M62: 28,049,900 km (0.083 R)
• M63: 28,566,312 km (0.071 R)
• M64: 29,137,925 km (0.065 R)
• M65: 29,346,764 km (0.103 R)
• M66: 29,451,333 km (0.115 R)
• M67: 30,028,781 km (0.113 R)
• M68: 31,301,709 km (0.095 R)
• M69: 32,917,515 km (0.109 R)
• M70: 33,135,031 km (0.082 R)
• M71: 34,339,742 km (0.114 R)
• M72: 35,503,165 km (0.079 R)
• M73: 35,614,615 km (0.085 R)
• M74: 35,837,965 km (0.072 R)
• M75: 36,229,912 km (0.093 R)
• M76: 36,342,110 km (0.119 R)
• M77: 36,679,453 km (0.078 R)
• M78: 36,961,445 km (0.116 R)
• M79: 37,641,068 km (0.078 R)
• M80: 37,811,610 km (0.07 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.41 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 247.9

Radius: 9.3

Gravity: 2.87 G

Time & Orbit

Eccentricity (e): 0.076

Orbit Range: 5 AU - 5.82 AU

Year: 8535 Days

Day: 5.3 Hours

Environment

Temp: -226 °C

Axial Tilt: 21 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 30,734,079 km

• M1: 123,418 km (0.095 R)
• M2: 282,740 km (0.032 R)
• M3: 417,677 km (0.071 R)
• M4: 478,713 km (0.113 R)
• M5: 554,410 km (0.109 R)
• M6: 682,765 km (0.113 R)
• M7: 847,771 km (0.104 R)
• M8: 914,941 km (0.119 R)
• M9: 1,372,560 km (0.061 R)
• M10: 1,468,752 km (0.108 R)
• M11: 1,584,092 km (0.115 R)
• M12: 2,020,319 km (0.064 R)
• M13: 2,186,522 km (0.118 R)
• M14: 2,833,683 km (0.09 R)
• M15: 2,978,344 km (0.117 R)
• M16: 3,083,212 km (0.114 R)
• M17: 3,146,791 km (0.09 R)
• M18: 3,603,663 km (0.096 R)
• M19: 4,058,291 km (0.064 R)
• M20: 4,363,620 km (0.067 R)
• M21: 4,603,575 km (0.094 R)
• M22: 4,848,018 km (0.046 R)
• M23: 5,222,462 km (0.12 R)
• M24: 5,710,151 km (0.078 R)
• M25: 5,814,869 km (0.089 R)
• M26: 6,510,051 km (0.111 R)
• M27: 6,591,881 km (0.09 R)
• M28: 6,701,685 km (0.114 R)
• M29: 6,867,440 km (0.102 R)
• M30: 7,231,411 km (0.085 R)
• M31: 7,687,984 km (0.083 R)
• M32: 8,301,335 km (0.037 R)
• M33: 8,688,944 km (0.083 R)
• M34: 10,012,885 km (0.095 R)
• M35: 11,201,739 km (0.096 R)
• M36: 11,630,038 km (0.11 R)
• M37: 11,796,091 km (0.115 R)
• M38: 12,130,891 km (0.107 R)
• M39: 12,265,529 km (0.083 R)
• M40: 12,809,617 km (0.071 R)
• M41: 13,084,578 km (0.109 R)
• M42: 13,570,322 km (0.112 R)
• M43: 13,640,334 km (0.088 R)
• M44: 13,710,346 km (0.112 R)
• M45: 13,885,824 km (0.055 R)
• M46: 14,168,265 km (0.059 R)
• M47: 14,274,778 km (0.106 R)
• M48: 14,452,650 km (0.045 R)
• M49: 14,524,008 km (0.115 R)
• M50: 14,918,797 km (0.076 R)
• M51: 15,099,362 km (0.044 R)
• M52: 15,353,529 km (0.076 R)
• M53: 15,608,892 km (0.047 R)
• M54: 16,087,157 km (0.11 R)
• M55: 16,272,359 km (0.075 R)
• M56: 16,495,559 km (0.113 R)
• M57: 16,982,649 km (0.063 R)
• M58: 17,512,376 km (0.104 R)
• M59: 17,894,149 km (0.102 R)
• M60: 18,086,083 km (0.037 R)
• M61: 19,923,444 km (0.083 R)
• M62: 20,602,469 km (0.09 R)
• M63: 21,451,886 km (0.112 R)
• M64: 21,901,278 km (0.097 R)
• M65: 22,065,536 km (0.083 R)
• M66: 23,603,851 km (0.081 R)
• M67: 24,449,678 km (0.028 R)
• M68: 24,919,116 km (0.117 R)
• M69: 25,823,584 km (0.11 R)
• M70: 26,388,915 km (0.112 R)
• M71: 26,651,309 km (0.108 R)
• M72: 28,690,777 km (0.087 R)
• M73: 28,780,536 km (0.11 R)
• M74: 28,870,444 km (0.105 R)
• M75: 29,956,674 km (0.08 R)

Kuiper Belt

Range: 30 - 51 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 228 - 18,051 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit