🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.58 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.95

Radius: 0.98

Gravity: 0.99 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 0.46 AU - 0.7 AU

Year: 160 Days

Day: 35.5 Hours

Environment

Temp: 200 °C

Axial Tilt: 3.1 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 93,648,488 km

• M1: 314,754 km (0.09 R)

Asteroid Belt

Center: 2.83 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 2 - Gas Giant

Semi-Major Axis: 5.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 367.1

Radius: 9.7

Gravity: 3.9 G

Time & Orbit

Eccentricity (e): 0.05

Orbit Range: 4.83 AU - 5.33 AU

Year: 4141 Days

Day: 6.2 Hours

Environment

Temp: -148 °C

Axial Tilt: 15.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 93,648,488 km

• M1: 124,166 km (0.058 R)
• M2: 210,783 km (0.118 R)
• M3: 273,764 km (0.087 R)
• M4: 339,737 km (0.116 R)
• M5: 444,754 km (0.119 R)
• M6: 720,912 km (0.04 R)
• M7: 810,970 km (0.105 R)
• M8: 1,037,162 km (0.115 R)
• M9: 1,420,581 km (0.111 R)
• M10: 1,601,744 km (0.076 R)
• M11: 1,695,243 km (0.115 R)
• M12: 2,044,554 km (0.119 R)
• M13: 2,131,770 km (0.084 R)
• M14: 2,235,142 km (0.079 R)
• M15: 2,309,941 km (0.108 R)
• M16: 2,539,723 km (0.108 R)
• M17: 3,273,351 km (0.094 R)
• M18: 3,410,532 km (0.094 R)
• M19: 3,479,796 km (0.1 R)
• M20: 3,602,018 km (0.084 R)
• M21: 3,815,194 km (0.075 R)
• M22: 3,941,455 km (0.071 R)
• M23: 4,014,160 km (0.105 R)
• M24: 4,087,463 km (0.1 R)
• M25: 4,235,265 km (0.095 R)
• M26: 4,517,257 km (0.079 R)
• M27: 5,099,642 km (0.093 R)
• M28: 5,198,975 km (0.087 R)
• M29: 5,460,322 km (0.068 R)
• M30: 5,541,704 km (0.075 R)
• M31: 5,808,736 km (0.028 R)
• M32: 6,017,126 km (0.085 R)
• M33: 6,122,293 km (0.102 R)
• M34: 6,227,909 km (0.08 R)
• M35: 6,592,030 km (0.07 R)
• M36: 6,809,396 km (0.047 R)
• M37: 7,363,207 km (0.068 R)
• M38: 7,566,212 km (0.111 R)
• M39: 7,634,279 km (0.078 R)
• M40: 8,000,793 km (0.038 R)
• M41: 8,870,107 km (0.064 R)
• M42: 8,965,999 km (0.056 R)
• M43: 9,110,361 km (0.066 R)
• M44: 9,376,944 km (0.102 R)
• M45: 9,769,489 km (0.065 R)
• M46: 10,042,355 km (0.057 R)
• M47: 10,192,253 km (0.039 R)
• M48: 10,393,462 km (0.111 R)
• M49: 10,621,299 km (0.117 R)
• M50: 10,927,526 km (0.1 R)
• M51: 11,262,775 km (0.099 R)
• M52: 12,235,011 km (0.11 R)
• M53: 12,448,787 km (0.113 R)
• M54: 12,663,909 km (0.118 R)
• M55: 13,729,644 km (0.038 R)
• M56: 14,063,397 km (0.094 R)
• M57: 14,795,678 km (0.104 R)
• M58: 15,511,504 km (0.111 R)
• M59: 15,626,994 km (0.111 R)
• M60: 15,975,407 km (0.051 R)
• M61: 16,150,586 km (0.109 R)
• M62: 16,385,305 km (0.114 R)
• M63: 16,502,889 km (0.102 R)
• M64: 17,605,126 km (0.092 R)
• M65: 17,786,140 km (0.119 R)
• M66: 18,089,075 km (0.115 R)
• M67: 18,700,332 km (0.054 R)
• M68: 18,884,936 km (0.082 R)
• M69: 19,974,158 km (0.115 R)
• M70: 20,320,776 km (0.076 R)
• M71: 20,510,616 km (0.119 R)
• M72: 20,669,339 km (0.107 R)
• M73: 20,732,918 km (0.097 R)
• M74: 21,179,767 km (0.104 R)
• M75: 21,243,945 km (0.112 R)

Planet 3 - Gas Giant

Semi-Major Axis: 8.28 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 136

Radius: 14.7

Gravity: 0.63 G

Time & Orbit

Eccentricity (e): 0.204

Orbit Range: 6.59 AU - 9.97 AU

Year: 8617 Days

Day: 6.1 Hours

Environment

Temp: -170 °C

Axial Tilt: 34.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 93,648,488 km

• M1: 200,760 km (0.069 R)
• M2: 383,868 km (0.089 R)
• M3: 648,357 km (0.113 R)
• M4: 794,813 km (0.108 R)
• M5: 989,740 km (0.113 R)
• M6: 1,137,692 km (0.056 R)
• M7: 1,293,722 km (0.051 R)
• M8: 1,687,165 km (0.1 R)
• M9: 2,070,584 km (0.109 R)
• M10: 2,297,674 km (0.077 R)
• M11: 2,671,369 km (0.11 R)
• M12: 2,955,605 km (0.083 R)
• M13: 3,101,463 km (0.065 R)
• M14: 3,212,614 km (0.05 R)
• M15: 3,592,593 km (0.065 R)
• M16: 3,867,404 km (0.116 R)
• M17: 4,068,015 km (0.066 R)
• M18: 4,169,592 km (0.12 R)
• M19: 4,313,355 km (0.101 R)
• M20: 4,542,689 km (0.115 R)
• M21: 4,733,277 km (0.091 R)
• M22: 5,410,207 km (0.063 R)
• M23: 6,281,764 km (0.102 R)
• M24: 6,589,936 km (0.111 R)
• M25: 6,709,913 km (0.079 R)
• M26: 7,000,732 km (0.092 R)
• M27: 7,569,652 km (0.095 R)
• M28: 7,720,597 km (0.119 R)
• M29: 7,872,588 km (0.088 R)
• M30: 8,412,187 km (0.101 R)
• M31: 8,542,487 km (0.102 R)
• M32: 9,554,517 km (0.05 R)
• M33: 9,799,857 km (0.103 R)
• M34: 9,964,565 km (0.114 R)
• M35: 10,241,171 km (0.08 R)
• M36: 10,688,917 km (0.083 R)
• M37: 10,886,985 km (0.057 R)
• M38: 11,000,679 km (0.103 R)
• M39: 12,247,578 km (0.117 R)
• M40: 12,573,701 km (0.088 R)
• M41: 13,814,765 km (0.069 R)
• M42: 14,559,314 km (0.09 R)
• M43: 15,380,755 km (0.089 R)
• M44: 15,572,540 km (0.084 R)
• M45: 16,412,382 km (0.098 R)
• M46: 16,641,118 km (0.065 R)
• M47: 16,903,662 km (0.088 R)
• M48: 17,002,546 km (0.067 R)
• M49: 17,300,246 km (0.102 R)
• M50: 17,399,878 km (0.114 R)
• M51: 17,533,020 km (0.086 R)
• M52: 17,833,712 km (0.072 R)
• M53: 18,035,220 km (0.105 R)
• M54: 18,271,136 km (0.087 R)
• M55: 19,122,497 km (0.088 R)
• M56: 19,674,065 km (0.104 R)
• M57: 19,882,305 km (0.117 R)
• M58: 20,091,293 km (0.073 R)
• M59: 20,335,886 km (0.115 R)
• M60: 20,934,427 km (0.101 R)
• M61: 21,717,422 km (0.112 R)
• M62: 21,824,833 km (0.118 R)
• M63: 21,968,597 km (0.118 R)
• M64: 22,112,510 km (0.109 R)
• M65: 22,292,925 km (0.101 R)
• M66: 22,764,158 km (0.106 R)
• M67: 23,055,874 km (0.093 R)
• M68: 23,275,484 km (0.067 R)
• M69: 23,495,692 km (0.046 R)
• M70: 23,975,452 km (0.118 R)
• M71: 24,532,854 km (0.104 R)
• M72: 24,906,998 km (0.104 R)

Planet 4 - Ice Giant

Semi-Major Axis: 13.45 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 422

Radius: 4.9

Gravity: 17.58 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 13.01 AU - 13.89 AU

Year: 17839 Days

Day: 24.7 Hours

Environment

Temp: -186 °C

Axial Tilt: 5.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 93,648,488 km

• M1: 70,760 km (0.098 R)
• M2: 182,210 km (0.058 R)
• M3: 356,941 km (0.118 R)
• M4: 941,719 km (0.053 R)
• M5: 986,149 km (0.106 R)
• M6: 1,100,292 km (0.072 R)
• M7: 1,243,009 km (0.102 R)
• M8: 1,598,902 km (0.086 R)
• M9: 2,100,055 km (0.073 R)
• M10: 2,337,467 km (0.044 R)
• M11: 2,398,203 km (0.087 R)
• M12: 2,459,389 km (0.078 R)
• M13: 2,490,206 km (0.107 R)
• M14: 2,677,802 km (0.109 R)
• M15: 2,837,722 km (0.105 R)
• M16: 2,967,872 km (0.119 R)
• M17: 3,066,756 km (0.11 R)
• M18: 3,099,967 km (0.043 R)
• M19: 3,473,214 km (0.055 R)
• M20: 3,647,495 km (0.102 R)
• M21: 4,114,241 km (0.113 R)
• M22: 4,675,831 km (0.071 R)
• M23: 4,752,575 km (0.112 R)
• M24: 5,181,921 km (0.048 R)
• M25: 5,421,277 km (0.114 R)
• M26: 5,501,910 km (0.116 R)
• M27: 5,582,843 km (0.104 R)
• M28: 6,844,701 km (0.051 R)
• M29: 6,975,599 km (0.079 R)
• M30: 7,195,508 km (0.066 R)
• M31: 7,732,714 km (0.059 R)
• M32: 7,823,520 km (0.093 R)
• M33: 8,098,032 km (0.117 R)
• M34: 8,987,990 km (0.095 R)
• M35: 11,473,708 km (0.12 R)
• M36: 11,785,470 km (0.047 R)
• M37: 12,205,391 km (0.098 R)
• M38: 12,311,157 km (0.038 R)
• M39: 12,470,329 km (0.117 R)
• M40: 12,523,586 km (0.046 R)
• M41: 12,576,843 km (0.026 R)
• M42: 14,266,102 km (0.108 R)
• M43: 14,545,251 km (0.076 R)
• M44: 14,882,445 km (0.065 R)
• M45: 15,052,089 km (0.078 R)
• M46: 15,279,179 km (0.108 R)
• M47: 15,336,175 km (0.113 R)
• M48: 15,679,353 km (0.094 R)
• M49: 15,851,989 km (0.073 R)
• M50: 16,141,012 km (0.115 R)
• M51: 16,315,293 km (0.096 R)
• M52: 20,428,636 km (0.032 R)
• M53: 21,440,516 km (0.058 R)
• M54: 21,568,273 km (0.117 R)
• M55: 22,728,255 km (0.067 R)
• M56: 22,923,630 km (0.051 R)
• M57: 22,988,854 km (0.057 R)
• M58: 23,381,549 km (0.09 R)
• M59: 25,512,870 km (0.045 R)
• M60: 25,580,488 km (0.071 R)
• M61: 28,402,951 km (0.059 R)
• M62: 28,543,124 km (0.078 R)
• M63: 30,243,304 km (0.106 R)
• M64: 30,529,933 km (0.041 R)
• M65: 31,830,388 km (0.049 R)
• M66: 33,814,953 km (0.086 R)
• M67: 34,335,853 km (0.105 R)
• M68: 35,914,858 km (0.088 R)
• M69: 36,446,380 km (0.089 R)
• M70: 36,522,525 km (0.055 R)
• M71: 37,210,226 km (0.104 R)
• M72: 39,689,811 km (0.099 R)
• M73: 42,222,204 km (0.119 R)
• M74: 42,302,089 km (0.079 R)
• M75: 42,542,343 km (0.111 R)
• M76: 42,702,712 km (0.082 R)
• M77: 45,624,359 km (0.047 R)
• M78: 46,777,758 km (0.102 R)
• M79: 47,275,022 km (0.112 R)
• M80: 48,024,208 km (0.06 R)
• M81: 49,113,430 km (0.099 R)
• M82: 49,281,578 km (0.09 R)
• M83: 49,365,801 km (0.117 R)
• M84: 52,085,790 km (0.106 R)
• M85: 52,515,136 km (0.07 R)
• M86: 54,331,254 km (0.094 R)
• M87: 54,505,236 km (0.111 R)
• M88: 55,028,530 km (0.092 R)
• M89: 55,290,775 km (0.034 R)
• M90: 57,226,421 km (0.053 R)
• M91: 57,314,983 km (0.119 R)
• M92: 58,558,890 km (0.087 R)
• M93: 58,826,670 km (0.038 R)
• M94: 59,184,209 km (0.047 R)

Planet 5 - Ice Giant

Semi-Major Axis: 18.48 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 408.1

Radius: 5.3

Gravity: 14.53 G

Time & Orbit

Eccentricity (e): 0.24

Orbit Range: 14.04 AU - 22.92 AU

Year: 28730 Days

Day: 19.7 Hours

Environment

Temp: -190 °C

Axial Tilt: 47.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 93,648,488 km

• M1: 230,680 km (0.115 R)
• M2: 387,907 km (0.077 R)
• M3: 949,348 km (0.094 R)
• M4: 1,233,135 km (0.108 R)
• M5: 1,672,355 km (0.11 R)
• M6: 1,705,416 km (0.058 R)
• M7: 1,806,095 km (0.108 R)
• M8: 2,450,712 km (0.105 R)
• M9: 3,037,286 km (0.079 R)
• M10: 3,159,657 km (0.076 R)
• M11: 3,622,213 km (0.029 R)
• M12: 4,150,743 km (0.12 R)
• M13: 4,562,885 km (0.051 R)
• M14: 5,132,553 km (0.076 R)
• M15: 5,524,649 km (0.11 R)
• M16: 5,875,756 km (0.075 R)
• M17: 5,926,469 km (0.111 R)
• M18: 6,337,714 km (0.03 R)
• M19: 6,599,360 km (0.103 R)
• M20: 7,025,266 km (0.038 R)
• M21: 8,991,281 km (0.097 R)
• M22: 9,226,149 km (0.106 R)
• M23: 11,050,944 km (0.079 R)
• M24: 11,555,987 km (0.086 R)
• M25: 14,055,618 km (0.052 R)
• M26: 14,533,583 km (0.045 R)
• M27: 14,671,213 km (0.066 R)
• M28: 15,928,732 km (0.12 R)
• M29: 16,070,551 km (0.075 R)
• M30: 17,511,777 km (0.047 R)
• M31: 18,173,897 km (0.113 R)
• M32: 19,598,069 km (0.096 R)
• M33: 20,980,054 km (0.073 R)
• M34: 22,234,732 km (0.099 R)
• M35: 22,631,764 km (0.103 R)
• M36: 24,733,914 km (0.075 R)
• M37: 24,816,043 km (0.099 R)
• M38: 24,980,451 km (0.114 R)
• M39: 25,062,879 km (0.096 R)
• M40: 26,981,921 km (0.074 R)
• M41: 28,344,608 km (0.11 R)
• M42: 30,079,195 km (0.101 R)
• M43: 30,254,524 km (0.107 R)
• M44: 30,342,338 km (0.096 R)
• M45: 30,430,301 km (0.105 R)
• M46: 30,871,017 km (0.096 R)
• M47: 32,474,855 km (0.091 R)
• M48: 33,287,022 km (0.095 R)
• M49: 34,380,134 km (0.053 R)
• M50: 35,577,665 km (0.079 R)
• M51: 36,041,867 km (0.059 R)
• M52: 36,414,665 km (0.099 R)
• M53: 37,258,098 km (0.066 R)
• M54: 41,570,855 km (0.112 R)
• M55: 42,845,877 km (0.116 R)
• M56: 44,233,398 km (0.102 R)
• M57: 46,139,723 km (0.101 R)
• M58: 46,645,813 km (0.115 R)
• M59: 47,459,476 km (0.093 R)
• M60: 49,928,289 km (0.071 R)
• M61: 50,135,782 km (0.088 R)
• M62: 51,387,617 km (0.06 R)
• M63: 52,544,008 km (0.081 R)
• M64: 54,028,169 km (0.074 R)
• M65: 55,741,214 km (0.088 R)
• M66: 55,956,485 km (0.091 R)
• M67: 56,388,075 km (0.099 R)
• M68: 57,254,546 km (0.104 R)
• M69: 57,580,669 km (0.069 R)
• M70: 58,125,505 km (0.11 R)
• M71: 59,440,021 km (0.093 R)
• M72: 59,549,976 km (0.084 R)
• M73: 59,880,437 km (0.08 R)
• M74: 62,880,922 km (0.115 R)
• M75: 64,343,091 km (0.097 R)
• M76: 64,795,176 km (0.095 R)
• M77: 65,134,913 km (0.089 R)
• M78: 66,957,165 km (0.078 R)
• M79: 67,071,607 km (0.117 R)
• M80: 67,989,390 km (0.089 R)
• M81: 68,104,431 km (0.094 R)
• M82: 69,142,640 km (0.085 R)
• M83: 69,489,857 km (0.117 R)
• M84: 71,001,094 km (0.089 R)
• M85: 72,640,687 km (0.077 R)
• M86: 73,583,303 km (0.048 R)
• M87: 73,701,336 km (0.086 R)
• M88: 74,411,327 km (0.084 R)
• M89: 75,361,423 km (0.117 R)
• M90: 76,076,651 km (0.113 R)
• M91: 77,633,965 km (0.116 R)
• M92: 78,476,799 km (0.086 R)
• M93: 80,901,780 km (0.104 R)
• M94: 81,389,769 km (0.078 R)

Planet 6 - Ice Giant

Semi-Major Axis: 18.55 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 611.9

Radius: 6.5

Gravity: 14.48 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 15.92 AU - 21.18 AU

Year: 28894 Days

Day: 20.5 Hours

Environment

Temp: -207 °C

Axial Tilt: 29.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 93,648,488 km

• M1: 96,191 km (0.06 R)
• M2: 667,506 km (0.09 R)
• M3: 829,371 km (0.102 R)
• M4: 886,218 km (0.109 R)
• M5: 1,034,170 km (0.1 R)
• M6: 1,525,300 km (0.047 R)
• M7: 1,850,974 km (0.101 R)
• M8: 2,318,169 km (0.099 R)
• M9: 2,734,499 km (0.035 R)
• M10: 2,951,416 km (0.091 R)
• M11: 3,587,955 km (0.118 R)
• M12: 3,682,352 km (0.056 R)
• M13: 3,729,774 km (0.046 R)
• M14: 3,777,496 km (0.107 R)
• M15: 4,019,096 km (0.086 R)
• M16: 4,982,207 km (0.053 R)
• M17: 5,516,571 km (0.069 R)
• M18: 7,226,325 km (0.107 R)
• M19: 7,647,144 km (0.1 R)
• M20: 7,829,953 km (0.095 R)
• M21: 8,076,041 km (0.088 R)
• M22: 8,324,523 km (0.119 R)
• M23: 9,278,808 km (0.113 R)
• M24: 10,401,690 km (0.116 R)
• M25: 10,944,879 km (0.072 R)
• M26: 12,058,636 km (0.074 R)
• M27: 13,721,865 km (0.105 R)
• M28: 14,092,867 km (0.101 R)
• M29: 15,764,025 km (0.047 R)
• M30: 16,308,861 km (0.108 R)
• M31: 17,257,162 km (0.094 R)
• M32: 17,899,236 km (0.056 R)
• M33: 19,123,993 km (0.03 R)
• M34: 19,621,556 km (0.114 R)
• M35: 23,485,968 km (0.103 R)
• M36: 24,375,926 km (0.09 R)
• M37: 25,458,266 km (0.104 R)
• M38: 26,464,163 km (0.071 R)
• M39: 27,389,725 km (0.106 R)
• M40: 28,231,961 km (0.068 R)
• M41: 28,892,734 km (0.077 R)
• M42: 28,987,579 km (0.09 R)
• M43: 29,368,007 km (0.073 R)
• M44: 30,615,503 km (0.047 R)
• M45: 31,294,379 km (0.108 R)
• M46: 33,859,084 km (0.114 R)
• M47: 34,059,246 km (0.075 R)
• M48: 36,183,536 km (0.089 R)
• M49: 36,695,610 km (0.059 R)
• M50: 37,416,522 km (0.088 R)
• M51: 37,623,416 km (0.07 R)
• M52: 39,923,633 km (0.09 R)
• M53: 41,197,458 km (0.115 R)
• M54: 41,304,271 km (0.103 R)
• M55: 41,732,121 km (0.103 R)
• M56: 43,132,956 km (0.064 R)
• M57: 43,241,414 km (0.062 R)
• M58: 43,349,873 km (0.084 R)
• M59: 45,980,701 km (0.118 R)
• M60: 46,202,255 km (0.118 R)
• M61: 47,875,208 km (0.034 R)
• M62: 51,509,988 km (0.058 R)
• M63: 51,625,028 km (0.042 R)
• M64: 51,740,069 km (0.072 R)
• M65: 52,316,919 km (0.114 R)
• M66: 56,413,507 km (0.087 R)
• M67: 61,098,014 km (0.099 R)
• M68: 61,463,632 km (0.048 R)
• M69: 64,909,768 km (0.091 R)
• M70: 68,670,958 km (0.072 R)
• M71: 69,304,654 km (0.113 R)
• M72: 69,558,672 km (0.1 R)
• M73: 70,322,668 km (0.107 R)
• M74: 70,577,882 km (0.069 R)
• M75: 71,602,029 km (0.056 R)
• M76: 71,987,393 km (0.096 R)
• M77: 72,244,701 km (0.088 R)
• M78: 72,631,113 km (0.097 R)
• M79: 73,018,272 km (0.111 R)
• M80: 73,924,386 km (0.101 R)
• M81: 74,183,939 km (0.045 R)
• M82: 74,313,789 km (0.108 R)
• M83: 75,747,685 km (0.075 R)
• M84: 76,664,720 km (0.086 R)
• M85: 78,377,915 km (0.119 R)
• M86: 79,438,265 km (0.111 R)
• M87: 80,370,110 km (0.11 R)
• M88: 81,573,475 km (0.074 R)
• M89: 82,244,421 km (0.067 R)
• M90: 86,993,107 km (0.091 R)
• M91: 87,267,170 km (0.084 R)
• M92: 87,678,714 km (0.061 R)
• M93: 89,746,306 km (0.087 R)
• M94: 91,272,653 km (0.084 R)
• M95: 93,367,921 km (0.108 R)
• M96: 93,508,243 km (0.086 R)

Kuiper Belt

Range: 30.3 - 50.3 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 259 - 12,456 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit