🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 2.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 50.1

Radius: 12.2

Gravity: 0.34 G

Time & Orbit

Eccentricity (e): 0.225

Orbit Range: 2.15 AU - 3.39 AU

Year: 3074 Days

Day: 14.3 Hours

Environment

Temp: -203 °C

Axial Tilt: 48.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (40)

Outer Limit: 65,434,617 km

• M1: 165,006 km (0.058 R)
• M2: 311,014 km (0.062 R)
• M3: 558,150 km (0.095 R)
• M4: 642,373 km (0.106 R)
• M5: 748,139 km (0.107 R)
• M6: 848,968 km (0.088 R)
• M7: 966,851 km (0.106 R)
• M8: 1,240,615 km (0.072 R)
• M9: 1,362,837 km (0.069 R)
• M10: 1,634,506 km (0.077 R)
• M11: 1,746,705 km (0.095 R)
• M12: 1,947,615 km (0.037 R)
• M13: 2,148,076 km (0.045 R)
• M14: 2,288,399 km (0.07 R)
• M15: 2,380,850 km (0.026 R)
• M16: 2,799,275 km (0.072 R)
• M17: 3,054,190 km (0.093 R)
• M18: 3,212,764 km (0.088 R)
• M19: 3,489,670 km (0.065 R)
• M20: 3,596,782 km (0.117 R)
• M21: 3,774,354 km (0.092 R)
• M22: 3,924,700 km (0.072 R)
• M23: 4,025,978 km (0.083 R)
• M24: 4,138,475 km (0.099 R)
• M25: 4,503,494 km (0.078 R)
• M26: 4,620,330 km (0.072 R)
• M27: 4,716,821 km (0.053 R)
• M28: 5,010,033 km (0.026 R)
• M29: 5,671,854 km (0.114 R)
• M30: 5,798,264 km (0.099 R)
• M31: 6,124,387 km (0.091 R)
• M32: 6,661,294 km (0.073 R)
• M33: 7,250,560 km (0.064 R)
• M34: 7,538,985 km (0.066 R)
• M35: 7,690,827 km (0.064 R)
• M36: 7,767,271 km (0.115 R)
• M37: 8,191,830 km (0.087 R)
• M38: 8,348,160 km (0.07 R)
• M39: 8,544,881 km (0.079 R)
• M40: 8,663,661 km (0.119 R)

Planet 2 - Gas Giant

Semi-Major Axis: 3.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 193.1

Radius: 13.5

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.222

Orbit Range: 2.37 AU - 3.73 AU

Year: 3552 Days

Day: 11.7 Hours

Environment

Temp: -211 °C

Axial Tilt: 84.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 65,434,617 km

• M1: 173,384 km (0.095 R)
• M2: 358,137 km (0.119 R)
• M3: 494,571 km (0.1 R)
• M4: 595,998 km (0.047 R)
• M5: 706,102 km (0.113 R)
• M6: 816,206 km (0.062 R)
• M7: 924,365 km (0.057 R)
• M8: 1,011,282 km (0.105 R)
• M9: 1,222,663 km (0.091 R)
• M10: 1,368,821 km (0.057 R)
• M11: 1,636,601 km (0.113 R)
• M12: 1,766,152 km (0.104 R)
• M13: 1,854,565 km (0.089 R)
• M14: 1,955,843 km (0.084 R)
• M15: 2,152,564 km (0.06 R)
• M16: 2,666,732 km (0.076 R)
• M17: 2,756,191 km (0.068 R)
• M18: 3,110,888 km (0.066 R)
• M19: 3,218,897 km (0.087 R)
• M20: 3,410,981 km (0.046 R)
• M21: 4,024,781 km (0.104 R)
• M22: 4,534,760 km (0.081 R)
• M23: 4,875,694 km (0.116 R)
• M24: 5,065,234 km (0.072 R)
• M25: 5,176,984 km (0.1 R)
• M26: 5,500,714 km (0.071 R)
• M27: 5,698,332 km (0.096 R)
• M28: 5,864,685 km (0.066 R)
• M29: 6,270,694 km (0.117 R)
• M30: 6,581,259 km (0.118 R)
• M31: 6,791,145 km (0.088 R)
• M32: 7,470,469 km (0.087 R)
• M33: 7,579,675 km (0.067 R)
• M34: 7,671,229 km (0.112 R)
• M35: 7,818,284 km (0.025 R)
• M36: 7,929,286 km (0.036 R)
• M37: 8,077,986 km (0.064 R)
• M38: 8,587,067 km (0.106 R)
• M39: 8,759,105 km (0.118 R)
• M40: 8,932,190 km (0.107 R)
• M41: 9,223,457 km (0.059 R)
• M42: 9,438,878 km (0.11 R)
• M43: 9,616,600 km (0.076 R)
• M44: 10,135,854 km (0.071 R)
• M45: 10,521,218 km (0.089 R)
• M46: 10,911,220 km (0.092 R)
• M47: 11,139,357 km (0.076 R)
• M48: 11,243,477 km (0.042 R)
• M49: 11,410,877 km (0.046 R)
• M50: 11,621,361 km (0.111 R)
• M51: 11,918,163 km (0.066 R)
• M52: 12,024,677 km (0.069 R)
• M53: 12,153,032 km (0.069 R)
• M54: 12,260,293 km (0.12 R)
• M55: 12,368,004 km (0.086 R)
• M56: 13,372,703 km (0.095 R)
• M57: 13,706,157 km (0.111 R)
• M58: 14,177,390 km (0.108 R)
• M59: 14,358,404 km (0.118 R)
• M60: 14,951,858 km (0.073 R)
• M61: 15,089,937 km (0.039 R)
• M62: 15,367,441 km (0.066 R)
• M63: 15,669,928 km (0.107 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.29 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 309.4

Radius: 11.7

Gravity: 2.26 G

Time & Orbit

Eccentricity (e): 0.001

Orbit Range: 3.29 AU - 3.29 AU

Year: 3979 Days

Day: 10.1 Hours

Environment

Temp: -218 °C

Axial Tilt: 38.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 65,434,617 km

• M1: 178,171 km (0.047 R)
• M2: 327,769 km (0.101 R)
• M3: 414,237 km (0.108 R)
• M4: 527,033 km (0.084 R)
• M5: 817,552 km (0.081 R)
• M6: 915,838 km (0.114 R)
• M7: 1,103,583 km (0.078 R)
• M8: 1,327,532 km (0.108 R)
• M9: 1,481,318 km (0.064 R)
• M10: 1,591,422 km (0.073 R)
• M11: 1,807,292 km (0.077 R)
• M12: 1,992,195 km (0.081 R)
• M13: 2,073,576 km (0.071 R)
• M14: 2,281,667 km (0.117 R)
• M15: 2,424,383 km (0.107 R)
• M16: 2,526,110 km (0.084 R)
• M17: 2,599,712 km (0.114 R)
• M18: 2,993,902 km (0.117 R)
• M19: 3,342,465 km (0.094 R)
• M20: 3,571,200 km (0.043 R)
• M21: 3,654,078 km (0.041 R)
• M22: 3,821,926 km (0.079 R)
• M23: 4,148,050 km (0.099 R)
• M24: 4,252,918 km (0.115 R)
• M25: 4,483,149 km (0.11 R)
• M26: 4,681,217 km (0.055 R)
• M27: 4,974,578 km (0.076 R)
• M28: 5,067,628 km (0.101 R)
• M29: 5,387,917 km (0.109 R)
• M30: 5,464,212 km (0.03 R)
• M31: 5,579,402 km (0.104 R)
• M32: 6,147,724 km (0.119 R)
• M33: 6,408,474 km (0.053 R)
• M34: 6,920,397 km (0.113 R)
• M35: 7,003,424 km (0.087 R)
• M36: 7,466,579 km (0.095 R)
• M37: 7,831,449 km (0.086 R)
• M38: 7,983,290 km (0.114 R)
• M39: 8,356,387 km (0.088 R)
• M40: 8,757,609 km (0.096 R)
• M41: 9,119,486 km (0.045 R)
• M42: 9,256,518 km (0.098 R)
• M43: 9,348,221 km (0.103 R)
• M44: 9,625,277 km (0.085 R)
• M45: 9,788,039 km (0.097 R)
• M46: 9,928,362 km (0.049 R)
• M47: 10,472,449 km (0.118 R)
• M48: 10,639,999 km (0.098 R)
• M49: 10,856,617 km (0.113 R)
• M50: 11,319,024 km (0.05 R)
• M51: 11,713,364 km (0.053 R)
• M52: 11,787,714 km (0.117 R)
• M53: 12,037,093 km (0.101 R)
• M54: 12,338,533 km (0.066 R)
• M55: 13,154,590 km (0.092 R)
• M56: 13,283,693 km (0.096 R)
• M57: 13,517,215 km (0.096 R)
• M58: 13,830,622 km (0.1 R)
• M59: 14,411,361 km (0.088 R)
• M60: 14,919,396 km (0.033 R)
• M61: 15,378,960 km (0.086 R)
• M62: 15,678,754 km (0.071 R)
• M63: 16,063,221 km (0.082 R)
• M64: 16,562,130 km (0.098 R)
• M65: 16,645,755 km (0.12 R)
• M66: 16,813,454 km (0.088 R)
• M67: 16,925,503 km (0.097 R)
• M68: 17,461,512 km (0.118 R)
• M69: 17,945,761 km (0.05 R)
• M70: 18,060,353 km (0.049 R)
• M71: 18,290,284 km (0.065 R)
• M72: 18,753,140 km (0.112 R)

Planet 4 - Ice Giant

Semi-Major Axis: 7.66 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 785

Radius: 3.4

Gravity: 67.91 G

Time & Orbit

Eccentricity (e): 0.11

Orbit Range: 6.82 AU - 8.5 AU

Year: 14138 Days

Day: 24.9 Hours

Environment

Temp: -228 °C

Axial Tilt: 34 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 65,434,617 km

• M1: 105,466 km (0.106 R)
• M2: 182,210 km (0.087 R)
• M3: 277,055 km (0.05 R)
• M4: 403,765 km (0.101 R)
• M5: 769,531 km (0.119 R)
• M6: 924,216 km (0.104 R)
• M7: 1,287,589 km (0.069 R)
• M8: 1,634,806 km (0.119 R)
• M9: 1,747,154 km (0.098 R)
• M10: 2,099,157 km (0.085 R)
• M11: 2,221,379 km (0.056 R)
• M12: 2,283,312 km (0.053 R)
• M13: 2,314,578 km (0.119 R)
• M14: 2,472,703 km (0.088 R)
• M15: 2,569,194 km (0.114 R)
• M16: 2,866,295 km (0.062 R)
• M17: 3,279,185 km (0.066 R)
• M18: 4,045,575 km (0.055 R)
• M19: 4,235,864 km (0.081 R)
• M20: 4,390,249 km (0.074 R)
• M21: 4,468,040 km (0.092 R)
• M22: 5,437,583 km (0.095 R)
• M23: 6,162,086 km (0.101 R)
• M24: 6,602,352 km (0.077 R)
• M25: 8,077,537 km (0.055 R)
• M26: 9,148,059 km (0.108 R)
• M27: 10,365,786 km (0.076 R)
• M28: 12,066,564 km (0.11 R)
• M29: 12,948,892 km (0.089 R)
• M30: 13,228,790 km (0.117 R)
• M31: 14,833,078 km (0.078 R)
• M32: 14,891,570 km (0.116 R)
• M33: 15,243,724 km (0.073 R)
• M34: 15,539,180 km (0.074 R)
• M35: 15,598,570 km (0.075 R)
• M36: 15,836,730 km (0.043 R)
• M37: 16,376,778 km (0.085 R)
• M38: 16,558,240 km (0.112 R)
• M39: 16,801,038 km (0.049 R)
• M40: 16,861,924 km (0.116 R)
• M41: 17,290,372 km (0.09 R)
• M42: 17,722,261 km (0.111 R)
• M43: 17,908,511 km (0.081 R)
• M44: 18,220,273 km (0.102 R)
• M45: 18,282,954 km (0.083 R)
• M46: 19,357,516 km (0.045 R)
• M47: 19,934,814 km (0.074 R)
• M48: 20,778,396 km (0.101 R)
• M49: 21,171,689 km (0.089 R)
• M50: 21,369,308 km (0.088 R)
• M51: 21,567,525 km (0.048 R)
• M52: 21,899,183 km (0.101 R)
• M53: 23,107,037 km (0.105 R)
• M54: 24,750,818 km (0.063 R)
• M55: 25,098,035 km (0.071 R)
• M56: 25,237,460 km (0.099 R)
• M57: 25,516,909 km (0.096 R)
• M58: 26,715,786 km (0.086 R)
• M59: 27,716,895 km (0.1 R)
• M60: 27,860,958 km (0.086 R)
• M61: 30,272,775 km (0.098 R)
• M62: 30,643,927 km (0.089 R)
• M63: 30,942,076 km (0.071 R)
• M64: 31,016,725 km (0.071 R)
• M65: 31,465,967 km (0.082 R)
• M66: 31,616,164 km (0.108 R)
• M67: 32,750,564 km (0.108 R)
• M68: 33,360,924 km (0.106 R)
• M69: 33,821,236 km (0.106 R)
• M70: 35,761,521 km (0.095 R)
• M71: 36,705,633 km (0.075 R)
• M72: 37,737,559 km (0.119 R)
• M73: 39,101,443 km (0.087 R)
• M74: 39,992,448 km (0.103 R)
• M75: 40,644,694 km (0.079 R)
• M76: 41,054,144 km (0.117 R)
• M77: 42,290,570 km (0.11 R)
• M78: 43,205,211 km (0.118 R)
• M79: 44,462,731 km (0.11 R)
• M80: 44,631,178 km (0.104 R)
• M81: 46,499,656 km (0.096 R)
• M82: 46,670,646 km (0.113 R)
• M83: 48,133,564 km (0.081 R)
• M84: 48,220,181 km (0.089 R)
• M85: 49,262,429 km (0.103 R)
• M86: 50,312,157 km (0.102 R)
• M87: 50,399,971 km (0.1 R)
• M88: 50,927,902 km (0.074 R)
• M89: 52,433,455 km (0.062 R)
• M90: 52,522,616 km (0.094 R)
• M91: 53,147,187 km (0.116 R)
• M92: 54,583,925 km (0.103 R)
• M93: 58,877,832 km (0.069 R)
• M94: 61,299,373 km (0.111 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.88 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 90.1

Radius: 4.6

Gravity: 4.26 G

Time & Orbit

Eccentricity (e): 0.234

Orbit Range: 6.04 AU - 9.72 AU

Year: 14751 Days

Day: 24.6 Hours

Environment

Temp: -242 °C

Axial Tilt: 12.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 65,434,617 km

• M1: 93,648 km (0.105 R)
• M2: 204,949 km (0.071 R)
• M3: 254,915 km (0.056 R)
• M4: 318,943 km (0.112 R)
• M5: 358,137 km (0.091 R)
• M6: 420,370 km (0.092 R)
• M7: 520,601 km (0.115 R)
• M8: 555,756 km (0.048 R)
• M9: 1,039,406 km (0.088 R)
• M10: 1,191,846 km (0.079 R)
• M11: 1,223,262 km (0.093 R)
• M12: 1,384,379 km (0.117 R)
• M13: 1,552,228 km (0.053 R)
• M14: 1,691,204 km (0.094 R)
• M15: 1,726,659 km (0.091 R)
• M16: 1,780,215 km (0.09 R)
• M17: 1,870,721 km (0.106 R)
• M18: 1,981,274 km (0.094 R)
• M19: 2,151,367 km (0.107 R)
• M20: 2,345,695 km (0.118 R)
• M21: 2,525,661 km (0.027 R)
• M22: 3,200,497 km (0.045 R)
• M23: 3,288,760 km (0.068 R)
• M24: 3,422,350 km (0.048 R)
• M25: 3,467,379 km (0.043 R)
• M26: 3,603,514 km (0.076 R)
• M27: 3,741,293 km (0.112 R)
• M28: 3,974,965 km (0.062 R)
• M29: 4,189,339 km (0.12 R)
• M30: 4,456,371 km (0.113 R)
• M31: 4,554,806 km (0.032 R)
• M32: 5,342,290 km (0.042 R)
• M33: 6,007,402 km (0.03 R)
• M34: 6,446,621 km (0.063 R)
• M35: 6,586,046 km (0.115 R)
• M36: 7,327,005 km (0.067 R)
• M37: 7,356,026 km (0.067 R)
• M38: 7,530,906 km (0.106 R)
• M39: 7,648,341 km (0.047 R)
• M40: 7,944,395 km (0.097 R)
• M41: 8,123,912 km (0.037 R)
• M42: 8,274,408 km (0.089 R)
• M43: 8,365,214 km (0.097 R)
• M44: 8,486,837 km (0.1 R)
• M45: 8,609,058 km (0.082 R)
• M46: 8,639,576 km (0.093 R)
• M47: 9,417,186 km (0.096 R)
• M48: 9,894,403 km (0.076 R)
• M49: 10,087,534 km (0.093 R)
• M50: 10,412,161 km (0.109 R)
• M51: 11,205,030 km (0.109 R)
• M52: 11,272,050 km (0.093 R)
• M53: 11,608,795 km (0.107 R)
• M54: 11,948,831 km (0.079 R)
• M55: 12,085,862 km (0.093 R)
• M56: 12,778,351 km (0.112 R)
• M57: 12,813,357 km (0.081 R)
• M58: 13,200,067 km (0.048 R)
• M59: 13,235,372 km (0.109 R)
• M60: 13,412,496 km (0.11 R)
• M61: 13,554,913 km (0.057 R)
• M62: 14,237,828 km (0.062 R)
• M63: 14,382,938 km (0.025 R)
• M64: 14,711,455 km (0.115 R)
• M65: 16,049,907 km (0.102 R)
• M66: 17,079,140 km (0.061 R)
• M67: 17,426,806 km (0.097 R)
• M68: 17,621,133 km (0.085 R)
• M69: 17,698,924 km (0.069 R)
• M70: 17,894,149 km (0.106 R)
• M71: 18,801,311 km (0.112 R)
• M72: 18,920,839 km (0.096 R)
• M73: 19,642,649 km (0.113 R)
• M74: 21,154,635 km (0.107 R)
• M75: 21,945,409 km (0.064 R)
• M76: 22,449,853 km (0.083 R)
• M77: 23,128,429 km (0.108 R)
• M78: 23,384,690 km (0.097 R)
• M79: 23,856,821 km (0.081 R)
• M80: 24,158,859 km (0.116 R)
• M81: 24,418,711 km (0.07 R)
• M82: 24,636,077 km (0.066 R)
• M83: 25,423,709 km (0.102 R)
• M84: 25,909,154 km (0.036 R)
• M85: 26,219,570 km (0.048 R)
• M86: 26,710,101 km (0.066 R)
• M87: 27,293,533 km (0.107 R)
• M88: 27,881,154 km (0.117 R)
• M89: 27,926,482 km (0.086 R)
• M90: 28,153,721 km (0.12 R)
• M91: 28,655,921 km (0.118 R)
• M92: 28,931,031 km (0.11 R)
• M93: 29,437,719 km (0.058 R)
• M94: 31,022,260 km (0.068 R)

Planet 6 - Ice Giant

Semi-Major Axis: 10.25 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 363.9

Radius: 7

Gravity: 7.43 G

Time & Orbit

Eccentricity (e): 0.022

Orbit Range: 10.02 AU - 10.48 AU

Year: 21883 Days

Day: 20.4 Hours

Environment

Temp: -237 °C

Axial Tilt: 36 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 65,434,617 km

• M1: 162,463 km (0.085 R)
• M2: 271,819 km (0.119 R)
• M3: 409,749 km (0.07 R)
• M4: 795,861 km (0.108 R)
• M5: 1,023,549 km (0.105 R)
• M6: 1,145,022 km (0.09 R)
• M7: 1,271,432 km (0.074 R)
• M8: 1,851,423 km (0.111 R)
• M9: 2,030,791 km (0.031 R)
• M10: 2,153,461 km (0.114 R)
• M11: 3,009,760 km (0.101 R)
• M12: 3,364,456 km (0.096 R)
• M13: 3,695,217 km (0.108 R)
• M14: 4,230,179 km (0.117 R)
• M15: 4,546,728 km (0.051 R)
• M16: 5,670,806 km (0.111 R)
• M17: 5,757,424 km (0.094 R)
• M18: 5,844,490 km (0.055 R)
• M19: 7,722,392 km (0.041 R)
• M20: 7,818,434 km (0.089 R)
• M21: 8,452,280 km (0.093 R)
• M22: 8,501,797 km (0.071 R)
• M23: 9,153,445 km (0.094 R)
• M24: 9,459,522 km (0.115 R)
• M25: 9,613,907 km (0.081 R)
• M26: 10,029,640 km (0.043 R)
• M27: 10,398,099 km (0.102 R)
• M28: 12,531,365 km (0.097 R)
• M29: 12,587,763 km (0.045 R)
• M30: 12,985,245 km (0.117 R)
• M31: 14,143,282 km (0.097 R)
• M32: 14,615,862 km (0.111 R)
• M33: 15,033,389 km (0.095 R)
• M34: 15,334,231 km (0.102 R)
• M35: 17,117,288 km (0.096 R)
• M36: 17,747,244 km (0.076 R)
• M37: 18,706,316 km (0.104 R)
• M38: 18,770,793 km (0.066 R)
• M39: 19,945,136 km (0.062 R)
• M40: 21,818,700 km (0.064 R)
• M41: 22,914,205 km (0.114 R)
• M42: 23,190,961 km (0.111 R)
• M43: 24,520,288 km (0.074 R)
• M44: 24,945,146 km (0.063 R)
• M45: 26,379,041 km (0.082 R)
• M46: 27,987,069 km (0.105 R)
• M47: 28,208,773 km (0.074 R)
• M48: 31,450,260 km (0.105 R)
• M49: 31,680,790 km (0.109 R)
• M50: 34,332,263 km (0.075 R)
• M51: 35,524,408 km (0.096 R)
• M52: 36,326,851 km (0.07 R)
• M53: 36,407,335 km (0.12 R)
• M54: 40,761,381 km (0.041 R)
• M55: 40,928,930 km (0.114 R)
• M56: 41,516,999 km (0.068 R)
• M57: 42,871,608 km (0.078 R)
• M58: 43,468,803 km (0.117 R)
• M59: 43,554,223 km (0.049 R)
• M60: 44,154,560 km (0.112 R)
• M61: 46,408,251 km (0.089 R)
• M62: 47,813,723 km (0.076 R)
• M63: 49,054,787 km (0.042 R)
• M64: 55,232,132 km (0.109 R)
• M65: 57,188,723 km (0.046 R)
• M66: 57,376,169 km (0.08 R)
• M67: 57,563,914 km (0.116 R)
• M68: 57,657,862 km (0.1 R)
• M69: 57,845,906 km (0.037 R)
• M70: 60,499,772 km (0.071 R)
• M71: 61,361,307 km (0.109 R)
• M72: 62,226,730 km (0.09 R)
• M73: 64,067,083 km (0.051 R)
• M74: 65,336,571 km (0.044 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: 340 - 11,593 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit