🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.53 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.15

Radius: 1.77

Gravity: 1.32 G

Time & Orbit

Eccentricity (e): 0.16

Orbit Range: 0.45 AU - 0.61 AU

Year: 146 Days

Day: 14.6 Hours

Environment

Temp: 150 °C

Axial Tilt: 23.5 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 95,485,393 km

• M1: 269,276 km (0.037 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.8 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.81

Radius: 1.71

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 0.61 AU - 0.99 AU

Year: 271 Days

Day: 44.9 Hours

Environment

Temp: 136 °C

Axial Tilt: 8.7 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (2)

Outer Limit: 95,485,393 km

• M1: 110,702 km (0.079 R)
• M2: 220,956 km (0.064 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.56 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.25

Radius: 0.57

Gravity: 0.77 G

Time & Orbit

Eccentricity (e): 0.091

Orbit Range: 1.42 AU - 1.7 AU

Year: 738 Days

Day: 21.2 Hours

Environment

Temp: -61 °C

Axial Tilt: 35.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 3.62 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.91

Radius: 1.89

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.173

Orbit Range: 2.99 AU - 4.25 AU

Year: 2609 Days

Day: 32.5 Hours

Environment

Temp: -123 °C

Axial Tilt: 19.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 5.37 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 467.1

Radius: 9.2

Gravity: 5.52 G

Time & Orbit

Eccentricity (e): 0.128

Orbit Range: 4.68 AU - 6.06 AU

Year: 4713 Days

Day: 14.2 Hours

Environment

Temp: -145 °C

Axial Tilt: 5.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 95,485,393 km

• M1: 120,875 km (0.071 R)
• M2: 191,784 km (0.074 R)
• M3: 266,883 km (0.068 R)
• M4: 373,546 km (0.097 R)
• M5: 433,535 km (0.11 R)
• M6: 595,699 km (0.094 R)
• M7: 1,292,974 km (0.071 R)
• M8: 1,696,739 km (0.029 R)
• M9: 1,976,637 km (0.076 R)
• M10: 2,073,127 km (0.028 R)
• M11: 2,721,335 km (0.091 R)
• M12: 2,847,296 km (0.081 R)
• M13: 2,956,952 km (0.073 R)
• M14: 3,409,186 km (0.117 R)
• M15: 3,486,678 km (0.047 R)
• M16: 3,683,100 km (0.114 R)
• M17: 3,923,653 km (0.082 R)
• M18: 4,740,607 km (0.067 R)
• M19: 4,849,065 km (0.059 R)
• M20: 4,936,431 km (0.113 R)
• M21: 5,068,675 km (0.101 R)
• M22: 5,381,484 km (0.028 R)
• M23: 5,540,208 km (0.101 R)
• M24: 5,654,650 km (0.102 R)
• M25: 5,909,116 km (0.098 R)
• M26: 6,002,465 km (0.087 R)
• M27: 6,988,764 km (0.12 R)
• M28: 7,087,648 km (0.119 R)
• M29: 7,211,964 km (0.087 R)
• M30: 8,180,161 km (0.101 R)
• M31: 8,467,987 km (0.051 R)
• M32: 8,999,957 km (0.112 R)
• M33: 9,542,848 km (0.114 R)
• M34: 9,680,179 km (0.114 R)
• M35: 9,984,760 km (0.118 R)
• M36: 10,124,185 km (0.114 R)
• M37: 10,489,952 km (0.051 R)
• M38: 10,603,347 km (0.098 R)
• M39: 11,003,372 km (0.104 R)
• M40: 11,379,312 km (0.066 R)
• M41: 11,437,505 km (0.109 R)
• M42: 11,554,341 km (0.081 R)
• M43: 11,759,589 km (0.117 R)
• M44: 11,995,505 km (0.102 R)
• M45: 12,114,136 km (0.118 R)
• M46: 12,173,676 km (0.101 R)
• M47: 12,472,423 km (0.03 R)
• M48: 12,743,345 km (0.107 R)
• M49: 13,229,837 km (0.101 R)
• M50: 13,321,690 km (0.111 R)
• M51: 13,475,327 km (0.093 R)
• M52: 13,722,313 km (0.099 R)
• M53: 14,567,093 km (0.051 R)
• M54: 14,947,969 km (0.119 R)
• M55: 15,139,753 km (0.104 R)
• M56: 15,267,959 km (0.105 R)
• M57: 15,719,595 km (0.117 R)
• M58: 15,849,446 km (0.114 R)
• M59: 15,914,521 km (0.073 R)
• M60: 16,012,358 km (0.04 R)
• M61: 16,471,174 km (0.115 R)
• M62: 17,134,342 km (0.083 R)
• M63: 17,234,572 km (0.056 R)
• M64: 17,435,482 km (0.113 R)
• M65: 17,839,845 km (0.087 R)
• M66: 18,692,254 km (0.118 R)
• M67: 18,829,884 km (0.056 R)
• M68: 19,279,426 km (0.113 R)
• M69: 19,418,552 km (0.037 R)
• M70: 19,767,563 km (0.032 R)
• M71: 20,189,280 km (0.111 R)
• M72: 21,005,635 km (0.092 R)
• M73: 21,435,879 km (0.118 R)
• M74: 21,579,942 km (0.042 R)
• M75: 21,688,251 km (0.091 R)
• M76: 21,941,520 km (0.086 R)
• M77: 22,014,075 km (0.074 R)
• M78: 22,597,357 km (0.108 R)
• M79: 23,148,924 km (0.03 R)
• M80: 24,003,128 km (0.042 R)
• M81: 24,981,199 km (0.09 R)
• M82: 25,322,731 km (0.091 R)

Planet 6 - Gas Giant

Semi-Major Axis: 8.7 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 285.7

Radius: 15

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 7.46 AU - 9.94 AU

Year: 9719 Days

Day: 12.7 Hours

Environment

Temp: -167 °C

Axial Tilt: 84.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 95,485,393 km

• M1: 195,375 km (0.045 R)
• M2: 359,184 km (0.119 R)
• M3: 625,170 km (0.08 R)
• M4: 833,859 km (0.098 R)
• M5: 1,037,461 km (0.102 R)
• M6: 1,308,533 km (0.111 R)
• M7: 1,444,367 km (0.093 R)
• M8: 1,549,684 km (0.111 R)
• M9: 1,787,246 km (0.086 R)
• M10: 2,319,515 km (0.077 R)
• M11: 2,486,765 km (0.119 R)
• M12: 3,842,571 km (0.105 R)
• M13: 4,067,117 km (0.071 R)
• M14: 4,168,395 km (0.077 R)
• M15: 4,660,871 km (0.06 R)
• M16: 4,927,754 km (0.085 R)
• M17: 5,282,151 km (0.081 R)
• M18: 5,532,578 km (0.03 R)
• M19: 5,701,624 km (0.096 R)
• M20: 5,815,318 km (0.086 R)
• M21: 6,365,988 km (0.057 R)
• M22: 6,484,021 km (0.067 R)
• M23: 6,994,000 km (0.054 R)
• M24: 7,548,409 km (0.046 R)
• M25: 8,053,003 km (0.098 R)
• M26: 8,503,741 km (0.117 R)
• M27: 8,764,939 km (0.089 R)
• M28: 9,295,563 km (0.069 R)
• M29: 9,700,375 km (0.082 R)
• M30: 10,249,100 km (0.118 R)
• M31: 10,387,927 km (0.086 R)
• M32: 10,949,367 km (0.045 R)
• M33: 11,448,875 km (0.109 R)
• M34: 11,701,396 km (0.064 R)
• M35: 11,882,858 km (0.086 R)
• M36: 12,359,327 km (0.06 R)
• M37: 12,804,531 km (0.034 R)
• M38: 13,330,816 km (0.101 R)
• M39: 13,520,506 km (0.112 R)
• M40: 14,017,919 km (0.112 R)
• M41: 14,249,496 km (0.071 R)
• M42: 14,951,858 km (0.033 R)
• M43: 15,346,946 km (0.081 R)
• M44: 17,043,985 km (0.106 R)
• M45: 17,249,981 km (0.038 R)
• M46: 17,664,517 km (0.068 R)
• M47: 18,503,312 km (0.119 R)
• M48: 18,927,721 km (0.09 R)
• M49: 19,055,627 km (0.074 R)
• M50: 19,226,618 km (0.043 R)
• M51: 20,744,737 km (0.113 R)
• M52: 21,718,768 km (0.111 R)
• M53: 21,986,997 km (0.109 R)
• M54: 22,256,274 km (0.097 R)
• M55: 22,798,267 km (0.107 R)
• M56: 23,573,483 km (0.073 R)
• M57: 23,895,118 km (0.117 R)
• M58: 24,403,751 km (0.109 R)
• M59: 24,962,499 km (0.04 R)
• M60: 25,056,147 km (0.075 R)
• M61: 25,290,418 km (0.113 R)
• M62: 26,187,855 km (0.103 R)
• M63: 26,378,144 km (0.107 R)
• M64: 26,473,438 km (0.058 R)
• M65: 26,951,552 km (0.082 R)
• M66: 27,868,139 km (0.104 R)
• M67: 30,079,345 km (0.085 R)
• M68: 30,278,609 km (0.069 R)
• M69: 31,686,026 km (0.093 R)
• M70: 32,295,637 km (0.069 R)
• M71: 34,043,987 km (0.073 R)
• M72: 34,720,619 km (0.076 R)

Planet 7 - Gas Giant

Semi-Major Axis: 9.03 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 632.4

Radius: 13.1

Gravity: 3.69 G

Time & Orbit

Eccentricity (e): 0.126

Orbit Range: 7.89 AU - 10.17 AU

Year: 10277 Days

Day: 10.7 Hours

Environment

Temp: -176 °C

Axial Tilt: 37.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 95,485,393 km

• M1: 170,691 km (0.118 R)
• M2: 286,929 km (0.094 R)
• M3: 556,205 km (0.039 R)
• M4: 724,652 km (0.087 R)
• M5: 859,141 km (0.117 R)
• M6: 947,852 km (0.061 R)
• M7: 1,155,344 km (0.098 R)
• M8: 1,683,425 km (0.045 R)
• M9: 2,010,296 km (0.076 R)
• M10: 2,778,332 km (0.098 R)
• M11: 3,308,955 km (0.086 R)
• M12: 3,483,087 km (0.105 R)
• M13: 3,932,180 km (0.058 R)
• M14: 4,055,000 km (0.085 R)
• M15: 4,336,393 km (0.111 R)
• M16: 4,591,757 km (0.106 R)
• M17: 5,184,763 km (0.085 R)
• M18: 5,353,958 km (0.119 R)
• M19: 5,490,541 km (0.097 R)
• M20: 5,662,878 km (0.092 R)
• M21: 5,872,165 km (0.056 R)
• M22: 6,479,084 km (0.096 R)
• M23: 6,734,896 km (0.085 R)
• M24: 6,919,650 km (0.06 R)
• M25: 7,408,087 km (0.092 R)
• M26: 7,829,953 km (0.107 R)
• M27: 8,024,430 km (0.088 R)
• M28: 8,457,815 km (0.077 R)
• M29: 8,858,588 km (0.09 R)
• M30: 9,471,191 km (0.116 R)
• M31: 10,013,333 km (0.114 R)
• M32: 10,480,079 km (0.104 R)
• M33: 10,694,602 km (0.098 R)
• M34: 11,084,305 km (0.063 R)
• M35: 11,346,699 km (0.104 R)
• M36: 11,967,231 km (0.09 R)
• M37: 12,281,536 km (0.117 R)
• M38: 12,417,072 km (0.093 R)
• M39: 12,553,206 km (0.071 R)
• M40: 12,781,044 km (0.098 R)
• M41: 13,194,831 km (0.066 R)
• M42: 13,287,283 km (0.064 R)
• M43: 13,894,052 km (0.036 R)
• M44: 14,224,514 km (0.093 R)
• M45: 15,231,606 km (0.114 R)
• M46: 17,364,722 km (0.099 R)
• M47: 17,618,740 km (0.082 R)
• M48: 18,803,405 km (0.099 R)
• M49: 19,326,549 km (0.104 R)
• M50: 19,907,437 km (0.109 R)
• M51: 20,870,549 km (0.08 R)
• M52: 21,032,563 km (0.057 R)
• M53: 23,736,993 km (0.092 R)
• M54: 24,929,288 km (0.064 R)
• M55: 25,908,855 km (0.092 R)
• M56: 26,724,912 km (0.091 R)
• M57: 27,312,981 km (0.069 R)
• M58: 28,441,996 km (0.068 R)
• M59: 28,922,056 km (0.12 R)
• M60: 29,163,058 km (0.091 R)
• M61: 29,465,245 km (0.107 R)
• M62: 30,807,138 km (0.089 R)
• M63: 31,982,080 km (0.081 R)
• M64: 32,168,928 km (0.096 R)
• M65: 33,550,464 km (0.075 R)
• M66: 34,503,402 km (0.096 R)
• M67: 35,400,840 km (0.059 R)
• M68: 35,658,747 km (0.088 R)
• M69: 36,046,654 km (0.075 R)
• M70: 36,436,057 km (0.119 R)
• M71: 37,546,672 km (0.115 R)
• M72: 38,271,324 km (0.095 R)
• M73: 38,801,200 km (0.102 R)
• M74: 39,935,301 km (0.084 R)
• M75: 40,069,490 km (0.119 R)
• M76: 40,742,382 km (0.049 R)
• M77: 41,012,555 km (0.095 R)
• M78: 41,419,013 km (0.067 R)
• M79: 42,441,066 km (0.104 R)
• M80: 43,747,504 km (0.109 R)
• M81: 45,276,693 km (0.109 R)

Planet 8 - Ice Giant

Semi-Major Axis: 12.82 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 326.5

Radius: 8

Gravity: 5.1 G

Time & Orbit

Eccentricity (e): 0.247

Orbit Range: 9.65 AU - 15.99 AU

Year: 17385 Days

Day: 21.9 Hours

Environment

Temp: -180 °C

Axial Tilt: 14.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 95,485,393 km

• M1: 179,517 km (0.103 R)
• M2: 339,288 km (0.093 R)
• M3: 453,282 km (0.066 R)
• M4: 893,698 km (0.119 R)
• M5: 1,276,668 km (0.113 R)
• M6: 2,124,888 km (0.083 R)
• M7: 2,179,342 km (0.055 R)
• M8: 2,574,131 km (0.091 R)
• M9: 2,632,324 km (0.09 R)
• M10: 2,720,437 km (0.039 R)
• M11: 3,622,812 km (0.101 R)
• M12: 4,469,087 km (0.094 R)
• M13: 5,905,077 km (0.114 R)
• M14: 7,016,739 km (0.11 R)
• M15: 7,429,329 km (0.079 R)
• M16: 8,669,645 km (0.089 R)
• M17: 8,889,853 km (0.054 R)
• M18: 9,471,340 km (0.071 R)
• M19: 9,927,016 km (0.099 R)
• M20: 10,250,147 km (0.114 R)
• M21: 10,483,220 km (0.047 R)
• M22: 10,576,869 km (0.105 R)
• M23: 10,765,063 km (0.093 R)
• M24: 10,907,031 km (0.054 R)
• M25: 12,162,606 km (0.098 R)
• M26: 13,108,813 km (0.106 R)
• M27: 15,018,280 km (0.109 R)
• M28: 15,071,088 km (0.096 R)
• M29: 15,177,003 km (0.09 R)
• M30: 15,389,283 km (0.082 R)
• M31: 15,602,609 km (0.029 R)
• M32: 16,032,254 km (0.038 R)
• M33: 17,344,377 km (0.049 R)
• M34: 17,845,380 km (0.066 R)
• M35: 17,957,280 km (0.114 R)
• M36: 18,918,296 km (0.118 R)
• M37: 20,128,543 km (0.064 R)
• M38: 20,713,620 km (0.045 R)
• M39: 21,008,179 km (0.113 R)
• M40: 21,661,323 km (0.078 R)
• M41: 21,721,012 km (0.116 R)
• M42: 21,960,369 km (0.119 R)
• M43: 22,441,625 km (0.117 R)
• M44: 22,744,262 km (0.065 R)
• M45: 25,025,181 km (0.101 R)
• M46: 25,087,862 km (0.068 R)
• M47: 25,150,544 km (0.105 R)
• M48: 26,735,084 km (0.118 R)
• M49: 27,313,430 km (0.037 R)
• M50: 29,933,337 km (0.102 R)
• M51: 30,199,621 km (0.025 R)
• M52: 31,003,560 km (0.093 R)
• M53: 31,070,730 km (0.111 R)
• M54: 33,595,044 km (0.094 R)
• M55: 33,733,422 km (0.111 R)
• M56: 34,497,568 km (0.114 R)
• M57: 35,197,088 km (0.116 R)
• M58: 35,619,103 km (0.034 R)
• M59: 36,539,280 km (0.081 R)
• M60: 40,003,667 km (0.113 R)
• M61: 42,296,255 km (0.086 R)
• M62: 42,819,847 km (0.108 R)
• M63: 43,270,287 km (0.097 R)
• M64: 47,162,374 km (0.09 R)
• M65: 47,782,906 km (0.091 R)
• M66: 49,897,323 km (0.045 R)
• M67: 51,323,888 km (0.054 R)
• M68: 52,122,142 km (0.041 R)

Planet 9 - Ice Giant

Semi-Major Axis: 17.42 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 714.1

Radius: 6.1

Gravity: 19.19 G

Time & Orbit

Eccentricity (e): 0.138

Orbit Range: 15.02 AU - 19.82 AU

Year: 27537 Days

Day: 20.8 Hours

Environment

Temp: -196 °C

Axial Tilt: 36.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 95,485,393 km

• M1: 131,796 km (0.103 R)
• M2: 452,982 km (0.08 R)
• M3: 986,598 km (0.119 R)
• M4: 1,048,083 km (0.096 R)
• M5: 1,273,078 km (0.114 R)
• M6: 1,478,027 km (0.063 R)
• M7: 1,620,594 km (0.115 R)
• M8: 2,316,224 km (0.03 R)
• M9: 2,958,298 km (0.094 R)
• M10: 3,462,144 km (0.058 R)
• M11: 3,556,689 km (0.115 R)
• M12: 3,748,324 km (0.056 R)
• M13: 4,651,447 km (0.101 R)
• M14: 4,913,991 km (0.094 R)
• M15: 4,966,949 km (0.103 R)
• M16: 5,898,046 km (0.05 R)
• M17: 6,354,618 km (0.117 R)
• M18: 6,645,736 km (0.028 R)
• M19: 7,060,571 km (0.034 R)
• M20: 8,102,669 km (0.069 R)
• M21: 8,228,481 km (0.095 R)
• M22: 8,418,321 km (0.075 R)
• M23: 8,866,815 km (0.106 R)
• M24: 9,921,032 km (0.111 R)
• M25: 10,463,025 km (0.066 R)
• M26: 11,223,580 km (0.114 R)
• M27: 11,716,954 km (0.039 R)
• M28: 11,930,580 km (0.101 R)
• M29: 13,091,310 km (0.081 R)
• M30: 13,985,307 km (0.054 R)
• M31: 14,898,901 km (0.074 R)
• M32: 15,910,332 km (0.052 R)
• M33: 17,265,988 km (0.081 R)
• M34: 18,575,268 km (0.049 R)
• M35: 20,086,207 km (0.077 R)
• M36: 21,548,975 km (0.094 R)
• M37: 21,898,136 km (0.063 R)
• M38: 23,582,010 km (0.117 R)
• M39: 27,354,719 km (0.117 R)
• M40: 29,939,471 km (0.093 R)
• M41: 30,818,358 km (0.11 R)
• M42: 32,003,173 km (0.083 R)
• M43: 32,701,197 km (0.083 R)
• M44: 33,404,307 km (0.098 R)
• M45: 35,234,786 km (0.107 R)
• M46: 35,337,560 km (0.099 R)
• M47: 35,543,108 km (0.058 R)
• M48: 38,041,243 km (0.112 R)
• M49: 38,357,492 km (0.115 R)
• M50: 38,674,640 km (0.07 R)
• M51: 39,951,607 km (0.081 R)
• M52: 41,242,487 km (0.073 R)
• M53: 42,437,774 km (0.106 R)
• M54: 42,656,337 km (0.111 R)
• M55: 45,531,309 km (0.119 R)
• M56: 46,091,403 km (0.12 R)
• M57: 49,729,175 km (0.045 R)
• M58: 51,349,469 km (0.079 R)
• M59: 52,166,124 km (0.107 R)
• M60: 52,986,967 km (0.105 R)
• M61: 53,222,434 km (0.093 R)
• M62: 57,034,637 km (0.089 R)
• M63: 57,880,314 km (0.036 R)
• M64: 58,851,802 km (0.066 R)
• M65: 59,583,934 km (0.111 R)
• M66: 61,798,432 km (0.06 R)
• M67: 63,539,452 km (0.085 R)
• M68: 65,044,406 km (0.111 R)
• M69: 65,422,440 km (0.091 R)
• M70: 67,069,363 km (0.079 R)
• M71: 68,345,433 km (0.093 R)
• M72: 68,729,750 km (0.08 R)
• M73: 71,180,761 km (0.117 R)
• M74: 73,004,958 km (0.075 R)
• M75: 73,791,543 km (0.114 R)
• M76: 74,580,822 km (0.091 R)
• M77: 75,637,731 km (0.082 R)
• M78: 75,770,125 km (0.098 R)
• M79: 76,167,905 km (0.12 R)
• M80: 76,832,569 km (0.093 R)
• M81: 78,971,968 km (0.034 R)
• M82: 80,319,097 km (0.029 R)
• M83: 80,589,420 km (0.082 R)
• M84: 80,995,429 km (0.079 R)
• M85: 82,081,659 km (0.115 R)
• M86: 82,490,211 km (0.101 R)
• M87: 83,446,141 km (0.072 R)
• M88: 84,543,142 km (0.077 R)
• M89: 87,306,365 km (0.115 R)
• M90: 88,559,396 km (0.048 R)
• M91: 89,818,412 km (0.089 R)
• M92: 91,506,325 km (0.089 R)
• M93: 92,495,765 km (0.085 R)
• M94: 94,200,283 km (0.105 R)

Kuiper Belt

Range: 30 - 52 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 492 - 13,827 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit