🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 3.53 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 219.8

Radius: 9.7

Gravity: 2.34 G

Time & Orbit

Eccentricity (e): 0.114

Orbit Range: 3.13 AU - 3.93 AU

Year: 4423 Days

Day: 8.5 Hours

Environment

Temp: -220 °C

Axial Tilt: 32.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 63,115,435 km

• M1: 158,873 km (0.037 R)
• M2: 260,899 km (0.062 R)
• M3: 405,859 km (0.119 R)
• M4: 581,487 km (0.113 R)
• M5: 728,242 km (0.108 R)
• M6: 820,694 km (0.072 R)
• M7: 917,334 km (0.071 R)
• M8: 1,028,336 km (0.111 R)
• M9: 1,133,503 km (0.061 R)
• M10: 1,354,908 km (0.111 R)
• M11: 1,554,172 km (0.111 R)
• M12: 2,020,768 km (0.051 R)
• M13: 2,194,900 km (0.105 R)
• M14: 2,263,266 km (0.119 R)
• M15: 2,332,231 km (0.035 R)
• M16: 2,486,616 km (0.11 R)
• M17: 2,601,208 km (0.05 R)
• M18: 2,702,785 km (0.107 R)
• M19: 2,791,047 km (0.089 R)
• M20: 3,046,112 km (0.069 R)
• M21: 3,498,945 km (0.103 R)
• M22: 3,643,905 km (0.098 R)
• M23: 3,873,238 km (0.096 R)
• M24: 4,329,063 km (0.114 R)
• M25: 4,766,188 km (0.075 R)
• M26: 4,909,204 km (0.107 R)
• M27: 5,017,363 km (0.112 R)
• M28: 5,199,424 km (0.086 R)
• M29: 5,439,229 km (0.087 R)
• M30: 5,532,578 km (0.063 R)
• M31: 5,701,773 km (0.091 R)
• M32: 5,949,208 km (0.103 R)
• M33: 6,613,123 km (0.039 R)
• M34: 6,933,712 km (0.115 R)
• M35: 7,055,185 km (0.109 R)
• M36: 7,259,386 km (0.048 R)
• M37: 7,321,021 km (0.114 R)
• M38: 7,403,449 km (0.09 R)
• M39: 7,757,248 km (0.117 R)
• M40: 8,137,975 km (0.106 R)
• M41: 8,373,741 km (0.118 R)
• M42: 8,481,601 km (0.095 R)
• M43: 8,676,976 km (0.112 R)
• M44: 8,786,182 km (0.073 R)
• M45: 9,160,775 km (0.063 R)
• M46: 9,316,656 km (0.047 R)
• M47: 9,540,754 km (0.038 R)
• M48: 9,675,990 km (0.118 R)
• M49: 9,902,930 km (0.077 R)
• M50: 10,062,850 km (0.11 R)
• M51: 10,269,744 km (0.036 R)
• M52: 10,454,946 km (0.093 R)
• M53: 10,781,519 km (0.09 R)
• M54: 10,946,076 km (0.101 R)
• M55: 11,087,745 km (0.068 R)
• M56: 11,253,799 km (0.1 R)
• M57: 11,781,281 km (0.073 R)
• M58: 12,023,630 km (0.116 R)
• M59: 12,267,773 km (0.107 R)
• M60: 12,341,376 km (0.049 R)
• M61: 12,686,498 km (0.032 R)
• M62: 13,185,108 km (0.089 R)
• M63: 13,260,505 km (0.086 R)
• M64: 13,487,295 km (0.056 R)
• M65: 13,741,013 km (0.105 R)
• M66: 15,613,380 km (0.104 R)
• M67: 15,719,744 km (0.107 R)
• M68: 16,606,261 km (0.058 R)
• M69: 16,851,003 km (0.052 R)
• M70: 17,069,416 km (0.111 R)
• M71: 17,343,779 km (0.071 R)
• M72: 17,426,357 km (0.09 R)
• M73: 17,536,760 km (0.116 R)
• M74: 17,674,988 km (0.096 R)
• M75: 17,758,165 km (0.103 R)
• M76: 18,878,952 km (0.102 R)

Planet 2 - Gas Giant

Semi-Major Axis: 4.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 914

Radius: 8.2

Gravity: 13.59 G

Time & Orbit

Eccentricity (e): 0.101

Orbit Range: 4.24 AU - 5.2 AU

Year: 6838 Days

Day: 5.9 Hours

Environment

Temp: -225 °C

Axial Tilt: 13.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 63,115,435 km

• M1: 142,866 km (0.098 R)
• M2: 253,868 km (0.112 R)
• M3: 335,847 km (0.112 R)
• M4: 479,012 km (0.087 R)
• M5: 732,730 km (0.116 R)
• M6: 826,528 km (0.096 R)
• M7: 958,025 km (0.074 R)
• M8: 1,043,894 km (0.107 R)
• M9: 1,995,037 km (0.113 R)
• M10: 2,404,636 km (0.068 R)
• M11: 2,766,065 km (0.054 R)
• M12: 3,144,398 km (0.108 R)
• M13: 3,274,249 km (0.088 R)
• M14: 3,326,757 km (0.044 R)
• M15: 3,379,416 km (0.099 R)
• M16: 3,512,408 km (0.075 R)
• M17: 3,647,196 km (0.066 R)
• M18: 4,005,782 km (0.093 R)
• M19: 4,061,881 km (0.043 R)
• M20: 4,289,270 km (0.062 R)
• M21: 4,520,698 km (0.04 R)
• M22: 4,638,132 km (0.119 R)
• M23: 4,697,074 km (0.1 R)
• M24: 4,905,763 km (0.082 R)
• M25: 5,056,707 km (0.104 R)
• M26: 5,117,444 km (0.046 R)
• M27: 5,209,147 km (0.055 R)
• M28: 5,363,084 km (0.104 R)
• M29: 5,549,782 km (0.104 R)
• M30: 5,675,594 km (0.062 R)
• M31: 6,548,647 km (0.096 R)
• M32: 7,017,786 km (0.111 R)
• M33: 7,153,920 km (0.091 R)
• M34: 7,602,115 km (0.103 R)
• M35: 8,381,221 km (0.061 R)
• M36: 9,976,383 km (0.052 R)
• M37: 10,129,571 km (0.103 R)
• M38: 10,515,683 km (0.053 R)
• M39: 11,024,914 km (0.085 R)
• M40: 11,262,625 km (0.095 R)
• M41: 11,542,074 km (0.084 R)
• M42: 12,230,374 km (0.117 R)
• M43: 13,015,464 km (0.075 R)
• M44: 14,938,843 km (0.071 R)
• M45: 15,201,986 km (0.081 R)
• M46: 16,179,758 km (0.037 R)
• M47: 16,404,753 km (0.041 R)
• M48: 17,177,875 km (0.07 R)
• M49: 18,289,237 km (0.101 R)
• M50: 18,995,638 km (0.117 R)
• M51: 19,090,483 km (0.074 R)
• M52: 19,519,381 km (0.108 R)
• M53: 19,711,015 km (0.103 R)
• M54: 19,903,249 km (0.109 R)
• M55: 20,435,069 km (0.074 R)
• M56: 20,922,609 km (0.105 R)
• M57: 22,860,649 km (0.03 R)
• M58: 23,519,328 km (0.087 R)
• M59: 24,596,433 km (0.037 R)
• M60: 24,699,955 km (0.107 R)
• M61: 24,803,477 km (0.084 R)
• M62: 25,323,479 km (0.095 R)
• M63: 25,532,467 km (0.101 R)
• M64: 25,689,694 km (0.071 R)
• M65: 26,798,663 km (0.105 R)
• M66: 27,225,167 km (0.079 R)
• M67: 27,761,625 km (0.109 R)
• M68: 27,815,480 km (0.066 R)
• M69: 27,977,046 km (0.086 R)
• M70: 28,031,051 km (0.056 R)
• M71: 29,008,523 km (0.071 R)
• M72: 29,721,207 km (0.105 R)
• M73: 30,162,820 km (0.087 R)
• M74: 30,829,129 km (0.06 R)
• M75: 30,940,729 km (0.064 R)
• M76: 32,063,461 km (0.077 R)
• M77: 32,176,408 km (0.095 R)
• M78: 32,971,072 km (0.111 R)
• M79: 33,085,215 km (0.063 R)
• M80: 33,657,427 km (0.06 R)
• M81: 34,986,155 km (0.091 R)
• M82: 35,218,929 km (0.097 R)
• M83: 36,272,996 km (0.117 R)
• M84: 36,390,729 km (0.089 R)
• M85: 36,863,010 km (0.065 R)
• M86: 37,754,164 km (0.063 R)
• M87: 38,592,062 km (0.052 R)
• M88: 38,772,477 km (0.073 R)
• M89: 38,832,615 km (0.099 R)
• M90: 40,774,994 km (0.076 R)

Planet 3 - Ice Giant

Semi-Major Axis: 5.86 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 855.8

Radius: 6.9

Gravity: 17.98 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 5.49 AU - 6.23 AU

Year: 9460 Days

Day: 22.3 Hours

Environment

Temp: -217 °C

Axial Tilt: 12.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 63,115,435 km

• M1: 151,094 km (0.1 R)
• M2: 215,870 km (0.082 R)
• M3: 259,104 km (0.119 R)
• M4: 743,950 km (0.113 R)
• M5: 966,402 km (0.086 R)
• M6: 1,085,482 km (0.088 R)
• M7: 1,146,967 km (0.049 R)
• M8: 2,022,563 km (0.057 R)
• M9: 2,576,524 km (0.105 R)
• M10: 2,631,726 km (0.098 R)
• M11: 2,771,301 km (0.12 R)
• M12: 3,264,226 km (0.075 R)
• M13: 3,597,530 km (0.087 R)
• M14: 3,690,430 km (0.111 R)
• M15: 4,967,846 km (0.108 R)
• M16: 5,105,925 km (0.106 R)
• M17: 5,350,817 km (0.116 R)
• M18: 5,997,977 km (0.092 R)
• M19: 6,556,127 km (0.074 R)
• M20: 7,130,882 km (0.078 R)
• M21: 8,246,134 km (0.105 R)
• M22: 8,368,954 km (0.12 R)
• M23: 8,991,580 km (0.103 R)
• M24: 9,244,700 km (0.11 R)
• M25: 9,543,147 km (0.104 R)
• M26: 10,062,102 km (0.095 R)
• M27: 10,237,132 km (0.109 R)
• M28: 10,992,152 km (0.057 R)
• M29: 11,037,181 km (0.066 R)
• M30: 11,490,313 km (0.082 R)
• M31: 12,508,476 km (0.032 R)
• M32: 12,743,943 km (0.095 R)
• M33: 12,980,757 km (0.077 R)
• M34: 13,123,623 km (0.119 R)
• M35: 13,797,112 km (0.113 R)
• M36: 14,828,141 km (0.09 R)
• M37: 14,977,589 km (0.097 R)
• M38: 15,782,426 km (0.095 R)
• M39: 17,067,920 km (0.071 R)
• M40: 17,486,346 km (0.115 R)
• M41: 17,591,513 km (0.034 R)
• M42: 18,226,705 km (0.088 R)
• M43: 18,333,369 km (0.097 R)
• M44: 18,600,850 km (0.05 R)
• M45: 18,708,111 km (0.1 R)
• M46: 18,977,387 km (0.102 R)
• M47: 19,957,254 km (0.089 R)
• M48: 20,177,162 km (0.111 R)
• M49: 20,675,024 km (0.066 R)
• M50: 20,953,426 km (0.119 R)
• M51: 21,120,975 km (0.027 R)
• M52: 21,570,218 km (0.105 R)
• M53: 23,920,999 km (0.073 R)
• M54: 24,624,258 km (0.116 R)
• M55: 24,801,233 km (0.104 R)
• M56: 24,978,506 km (0.105 R)
• M57: 25,096,988 km (0.065 R)
• M58: 25,811,617 km (0.053 R)
• M59: 26,835,315 km (0.111 R)
• M60: 27,688,322 km (0.08 R)
• M61: 28,550,155 km (0.099 R)
• M62: 28,860,122 km (0.084 R)
• M63: 28,922,355 km (0.094 R)
• M64: 29,420,964 km (0.073 R)
• M65: 30,426,561 km (0.072 R)
• M66: 30,870,119 km (0.072 R)
• M67: 31,635,462 km (0.074 R)
• M68: 32,536,190 km (0.08 R)
• M69: 32,600,966 km (0.109 R)
• M70: 33,706,794 km (0.049 R)
• M71: 35,023,405 km (0.095 R)
• M72: 37,097,280 km (0.083 R)
• M73: 38,387,861 km (0.093 R)
• M74: 38,935,688 km (0.062 R)
• M75: 40,108,386 km (0.089 R)
• M76: 40,733,855 km (0.067 R)
• M77: 41,013,004 km (0.105 R)
• M78: 41,152,729 km (0.096 R)
• M79: 41,222,740 km (0.06 R)
• M80: 41,643,110 km (0.104 R)
• M81: 41,853,894 km (0.088 R)
• M82: 42,276,508 km (0.078 R)
• M83: 42,629,858 km (0.068 R)
• M84: 42,842,287 km (0.119 R)
• M85: 42,983,956 km (0.084 R)
• M86: 43,552,877 km (0.033 R)
• M87: 44,052,534 km (0.112 R)
• M88: 44,482,478 km (0.083 R)
• M89: 45,129,938 km (0.098 R)
• M90: 46,288,573 km (0.11 R)
• M91: 47,456,933 km (0.091 R)
• M92: 47,677,141 km (0.056 R)
• M93: 47,824,046 km (0.086 R)
• M94: 49,079,321 km (0.119 R)

Planet 4 - Ice Giant

Semi-Major Axis: 7.09 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 924.6

Radius: 5.7

Gravity: 28.46 G

Time & Orbit

Eccentricity (e): 0.232

Orbit Range: 5.45 AU - 8.73 AU

Year: 12589 Days

Day: 15.3 Hours

Environment

Temp: -236 °C

Axial Tilt: 32.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 63,115,435 km

• M1: 142,118 km (0.078 R)
• M2: 640,279 km (0.081 R)
• M3: 1,440,777 km (0.098 R)
• M4: 1,519,466 km (0.111 R)
• M5: 1,963,472 km (0.099 R)
• M6: 2,352,277 km (0.09 R)
• M7: 2,995,847 km (0.091 R)
• M8: 3,164,893 km (0.106 R)
• M9: 3,267,965 km (0.087 R)
• M10: 3,371,936 km (0.114 R)
• M11: 4,093,297 km (0.026 R)
• M12: 4,433,183 km (0.081 R)
• M13: 4,900,377 km (0.115 R)
• M14: 5,019,607 km (0.108 R)
• M15: 5,260,908 km (0.096 R)
• M16: 5,423,970 km (0.119 R)
• M17: 5,796,917 km (0.048 R)
• M18: 5,880,842 km (0.109 R)
• M19: 6,135,308 km (0.103 R)
• M20: 6,178,093 km (0.111 R)
• M21: 6,742,974 km (0.108 R)
• M22: 6,831,387 km (0.109 R)
• M23: 7,053,988 km (0.063 R)
• M24: 7,324,162 km (0.108 R)
• M25: 7,921,506 km (0.071 R)
• M26: 8,918,875 km (0.089 R)
• M27: 9,655,346 km (0.078 R)
• M28: 9,905,174 km (0.075 R)
• M29: 11,133,672 km (0.098 R)
• M30: 11,185,882 km (0.065 R)
• M31: 11,659,508 km (0.088 R)
• M32: 12,086,012 km (0.099 R)
• M33: 12,355,288 km (0.082 R)
• M34: 14,124,433 km (0.107 R)
• M35: 14,865,540 km (0.111 R)
• M36: 15,677,558 km (0.12 R)
• M37: 16,922,661 km (0.078 R)
• M38: 17,344,676 km (0.093 R)
• M39: 17,465,851 km (0.038 R)
• M40: 19,569,346 km (0.115 R)
• M41: 20,714,817 km (0.087 R)
• M42: 21,101,528 km (0.096 R)
• M43: 21,230,930 km (0.071 R)
• M44: 21,947,354 km (0.115 R)
• M45: 22,078,551 km (0.057 R)
• M46: 22,407,517 km (0.115 R)
• M47: 23,672,217 km (0.05 R)
• M48: 24,619,022 km (0.107 R)
• M49: 25,096,988 km (0.088 R)
• M50: 25,302,685 km (0.071 R)
• M51: 26,201,020 km (0.101 R)
• M52: 27,179,839 km (0.098 R)
• M53: 27,957,448 km (0.035 R)
• M54: 28,241,984 km (0.055 R)
• M55: 28,527,566 km (0.118 R)
• M56: 28,599,074 km (0.068 R)
• M57: 28,814,046 km (0.088 R)
• M58: 29,173,380 km (0.105 R)
• M59: 29,751,576 km (0.059 R)
• M60: 30,625,975 km (0.095 R)
• M61: 30,845,884 km (0.115 R)
• M62: 30,992,789 km (0.107 R)
• M63: 31,360,950 km (0.079 R)
• M64: 31,656,705 km (0.087 R)
• M65: 34,511,182 km (0.114 R)
• M66: 34,663,622 km (0.046 R)
• M67: 35,275,926 km (0.064 R)
• M68: 36,123,547 km (0.112 R)
• M69: 36,355,873 km (0.095 R)
• M70: 36,433,514 km (0.071 R)
• M71: 38,627,367 km (0.092 R)
• M72: 39,501,019 km (0.029 R)
• M73: 40,060,215 km (0.089 R)
• M74: 41,267,470 km (0.115 R)
• M75: 42,160,420 km (0.094 R)
• M76: 42,568,373 km (0.094 R)
• M77: 43,882,740 km (0.106 R)
• M78: 45,293,747 km (0.081 R)
• M79: 47,565,092 km (0.099 R)
• M80: 47,904,679 km (0.116 R)
• M81: 48,074,921 km (0.074 R)
• M82: 52,480,429 km (0.092 R)
• M83: 54,065,867 km (0.12 R)
• M84: 54,242,991 km (0.092 R)
• M85: 55,488,244 km (0.088 R)
• M86: 56,024,851 km (0.089 R)
• M87: 56,563,254 km (0.097 R)
• M88: 56,743,071 km (0.046 R)
• M89: 57,193,360 km (0.037 R)
• M90: 57,735,353 km (0.062 R)
• M91: 59,554,314 km (0.095 R)
• M92: 61,484,426 km (0.107 R)

Planet 5 - Ice Giant

Semi-Major Axis: 8.46 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 580.8

Radius: 6.6

Gravity: 13.33 G

Time & Orbit

Eccentricity (e): 0.18

Orbit Range: 6.94 AU - 9.98 AU

Year: 16409 Days

Day: 15.5 Hours

Environment

Temp: -226 °C

Axial Tilt: 4.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 63,115,435 km

• M1: 409,599 km (0.05 R)
• M2: 1,055,114 km (0.103 R)
• M3: 1,869,824 km (0.053 R)
• M4: 1,957,039 km (0.097 R)
• M5: 2,288,249 km (0.119 R)
• M6: 2,350,482 km (0.114 R)
• M7: 2,476,443 km (0.102 R)
• M8: 2,540,321 km (0.1 R)
• M9: 3,174,018 km (0.099 R)
• M10: 3,965,840 km (0.078 R)
• M11: 4,422,562 km (0.106 R)
• M12: 4,657,131 km (0.116 R)
• M13: 5,097,697 km (0.119 R)
• M14: 5,343,786 km (0.086 R)
• M15: 6,234,940 km (0.119 R)
• M16: 6,497,933 km (0.068 R)
• M17: 6,809,396 km (0.079 R)
• M18: 7,034,989 km (0.08 R)
• M19: 7,262,827 km (0.09 R)
• M20: 8,632,246 km (0.117 R)
• M21: 9,221,811 km (0.092 R)
• M22: 9,371,259 km (0.106 R)
• M23: 9,521,456 km (0.11 R)
• M24: 9,824,391 km (0.108 R)
• M25: 10,491,299 km (0.047 R)
• M26: 10,543,209 km (0.05 R)
• M27: 10,804,108 km (0.092 R)
• M28: 11,492,408 km (0.079 R)
• M29: 12,085,713 km (0.032 R)
• M30: 12,744,392 km (0.102 R)
• M31: 12,966,545 km (0.119 R)
• M32: 13,924,869 km (0.107 R)
• M33: 15,139,903 km (0.094 R)
• M34: 15,493,253 km (0.118 R)
• M35: 15,552,344 km (0.08 R)
• M36: 15,670,975 km (0.085 R)
• M37: 17,116,839 km (0.047 R)
• M38: 17,239,210 km (0.119 R)
• M39: 17,669,902 km (0.046 R)
• M40: 19,046,502 km (0.066 R)
• M41: 19,173,361 km (0.116 R)
• M42: 19,619,611 km (0.11 R)
• M43: 19,747,667 km (0.083 R)
• M44: 20,262,882 km (0.119 R)
• M45: 20,913,184 km (0.112 R)
• M46: 23,242,572 km (0.051 R)
• M47: 24,334,487 km (0.041 R)
• M48: 25,303,582 km (0.032 R)
• M49: 27,493,994 km (0.091 R)
• M50: 28,141,155 km (0.1 R)
• M51: 28,213,410 km (0.115 R)
• M52: 28,502,882 km (0.111 R)
• M53: 29,377,282 km (0.092 R)
• M54: 29,597,340 km (0.073 R)
• M55: 29,891,450 km (0.098 R)
• M56: 30,408,610 km (0.089 R)
• M57: 31,003,261 km (0.113 R)
• M58: 31,077,910 km (0.03 R)
• M59: 31,526,704 km (0.088 R)
• M60: 31,601,653 km (0.065 R)
• M61: 31,751,998 km (0.115 R)
• M62: 33,343,421 km (0.052 R)
• M63: 34,264,495 km (0.046 R)
• M64: 34,650,756 km (0.066 R)
• M65: 37,394,531 km (0.056 R)
• M66: 38,111,254 km (0.114 R)
• M67: 39,558,464 km (0.113 R)
• M68: 40,370,182 km (0.045 R)
• M69: 40,614,775 km (0.073 R)
• M70: 41,105,306 km (0.077 R)
• M71: 42,340,536 km (0.113 R)
• M72: 43,671,508 km (0.085 R)
• M73: 44,510,154 km (0.099 R)
• M74: 44,678,601 km (0.107 R)
• M75: 46,033,359 km (0.093 R)
• M76: 46,544,984 km (0.104 R)
• M77: 50,704,254 km (0.092 R)
• M78: 50,968,144 km (0.086 R)
• M79: 51,320,746 km (0.091 R)
• M80: 52,917,255 km (0.045 R)
• M81: 53,274,195 km (0.107 R)
• M82: 53,452,965 km (0.088 R)
• M83: 54,080,378 km (0.045 R)
• M84: 54,800,393 km (0.119 R)
• M85: 55,252,029 km (0.113 R)
• M86: 56,249,847 km (0.028 R)
• M87: 56,523,012 km (0.045 R)
• M88: 57,803,570 km (0.098 R)
• M89: 58,631,893 km (0.095 R)
• M90: 59,001,400 km (0.106 R)
• M91: 59,093,852 km (0.101 R)
• M92: 59,278,904 km (0.12 R)
• M93: 59,556,857 km (0.038 R)
• M94: 59,742,508 km (0.101 R)
• M95: 62,266,374 km (0.05 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 547 - 20,129 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit