🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.56 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.38

Radius: 1.63

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 0.47 AU - 0.65 AU

Year: 271 Days

Day: 36.3 Hours

Environment

Temp: -117 °C

Axial Tilt: 8.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.61 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.29

Radius: 0.61

Gravity: 0.78 G

Time & Orbit

Eccentricity (e): 0.12

Orbit Range: 0.54 AU - 0.68 AU

Year: 308 Days

Day: 22.7 Hours

Environment

Temp: -122 °C

Axial Tilt: 2.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 1.67 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 543

Radius: 14.7

Gravity: 2.51 G

Time & Orbit

Eccentricity (e): 0.005

Orbit Range: 1.66 AU - 1.68 AU

Year: 1393 Days

Day: 5.9 Hours

Environment

Temp: -184 °C

Axial Tilt: 7.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 38,667,789 km

• M1: 183,856 km (0.101 R)
• M2: 280,346 km (0.032 R)
• M3: 377,435 km (0.068 R)
• M4: 599,439 km (0.073 R)
• M5: 739,462 km (0.025 R)
• M6: 831,016 km (0.077 R)
• M7: 1,079,349 km (0.09 R)
• M8: 1,232,986 km (0.106 R)
• M9: 1,793,529 km (0.025 R)
• M10: 1,894,358 km (0.088 R)
• M11: 2,141,045 km (0.072 R)
• M12: 2,307,996 km (0.108 R)
• M13: 2,408,526 km (0.108 R)
• M14: 2,582,658 km (0.112 R)
• M15: 3,355,630 km (0.096 R)
• M16: 3,481,741 km (0.07 R)
• M17: 3,703,295 km (0.119 R)
• M18: 3,845,712 km (0.035 R)
• M19: 4,074,896 km (0.108 R)
• M20: 4,246,784 km (0.082 R)
• M21: 4,636,188 km (0.049 R)
• M22: 4,789,974 km (0.097 R)
• M23: 4,893,496 km (0.103 R)
• M24: 4,997,766 km (0.068 R)
• M25: 5,089,619 km (0.085 R)
• M26: 5,208,699 km (0.107 R)
• M27: 5,395,546 km (0.096 R)
• M28: 5,680,231 km (0.117 R)
• M29: 6,292,834 km (0.119 R)
• M30: 6,607,140 km (0.041 R)
• M31: 6,780,673 km (0.077 R)
• M32: 6,897,359 km (0.111 R)
• M33: 7,176,958 km (0.089 R)
• M34: 7,505,475 km (0.076 R)
• M35: 7,717,156 km (0.09 R)
• M36: 8,395,283 km (0.098 R)
• M37: 8,646,757 km (0.119 R)
• M38: 8,836,896 km (0.099 R)
• M39: 9,124,872 km (0.08 R)
• M40: 9,367,220 km (0.056 R)
• M41: 9,497,221 km (0.087 R)
• M42: 9,677,187 km (0.115 R)
• M43: 9,924,323 km (0.098 R)
• M44: 10,340,953 km (0.084 R)
• M45: 10,492,346 km (0.102 R)
• M46: 10,644,487 km (0.056 R)
• M47: 10,797,376 km (0.114 R)
• M48: 11,243,178 km (0.088 R)
• M49: 11,485,825 km (0.065 R)
• M50: 11,590,245 km (0.029 R)
• M51: 11,888,094 km (0.098 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 45.5

Radius: 9.1

Gravity: 0.55 G

Time & Orbit

Eccentricity (e): 0.126

Orbit Range: 3.63 AU - 4.67 AU

Year: 5459 Days

Day: 11.6 Hours

Environment

Temp: -214 °C

Axial Tilt: 33.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (41)

Outer Limit: 38,667,789 km

• M1: 114,293 km (0.072 R)
• M2: 197,320 km (0.074 R)
• M3: 321,336 km (0.048 R)
• M4: 448,644 km (0.073 R)
• M5: 544,237 km (0.038 R)
• M6: 701,764 km (0.111 R)
• M7: 1,102,836 km (0.101 R)
• M8: 1,211,444 km (0.118 R)
• M9: 1,323,642 km (0.081 R)
• M10: 1,512,434 km (0.098 R)
• M11: 1,807,292 km (0.105 R)
• M12: 2,048,144 km (0.111 R)
• M13: 2,278,076 km (0.05 R)
• M14: 2,571,887 km (0.077 R)
• M15: 2,661,197 km (0.041 R)
• M16: 2,959,046 km (0.095 R)
• M17: 3,017,539 km (0.105 R)
• M18: 3,401,257 km (0.097 R)
• M19: 3,462,742 km (0.079 R)
• M20: 3,611,592 km (0.104 R)
• M21: 4,214,920 km (0.077 R)
• M22: 4,602,827 km (0.109 R)
• M23: 5,312,819 km (0.059 R)
• M24: 5,441,623 km (0.1 R)
• M25: 5,585,984 km (0.116 R)
• M26: 5,834,467 km (0.099 R)
• M27: 6,957,647 km (0.114 R)
• M28: 7,383,852 km (0.109 R)
• M29: 7,576,085 km (0.096 R)
• M30: 7,802,277 km (0.051 R)
• M31: 7,949,032 km (0.04 R)
• M32: 8,228,481 km (0.034 R)
• M33: 8,729,784 km (0.118 R)
• M34: 8,898,979 km (0.099 R)
• M35: 9,103,629 km (0.076 R)
• M36: 9,867,027 km (0.085 R)
• M37: 11,141,900 km (0.095 R)
• M38: 11,215,203 km (0.099 R)
• M39: 11,307,056 km (0.056 R)
• M40: 11,547,310 km (0.116 R)
• M41: 12,563,080 km (0.106 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.39 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 418.3

Radius: 13.2

Gravity: 2.4 G

Time & Orbit

Eccentricity (e): 0.04

Orbit Range: 4.21 AU - 4.57 AU

Year: 5939 Days

Day: 9.3 Hours

Environment

Temp: -223 °C

Axial Tilt: 14.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 38,667,789 km

• M1: 166,652 km (0.099 R)
• M2: 283,937 km (0.106 R)
• M3: 375,790 km (0.085 R)
• M4: 522,695 km (0.069 R)
• M5: 659,577 km (0.097 R)
• M6: 798,553 km (0.102 R)
• M7: 897,288 km (0.065 R)
• M8: 1,292,825 km (0.106 R)
• M9: 1,426,715 km (0.118 R)
• M10: 1,757,925 km (0.03 R)
• M11: 1,857,108 km (0.077 R)
• M12: 2,044,255 km (0.093 R)
• M13: 2,382,346 km (0.113 R)
• M14: 2,874,224 km (0.098 R)
• M15: 3,213,213 km (0.087 R)
• M16: 3,315,388 km (0.064 R)
• M17: 3,565,216 km (0.12 R)
• M18: 3,692,375 km (0.119 R)
• M19: 4,172,135 km (0.054 R)
• M20: 4,556,602 km (0.114 R)
• M21: 4,788,179 km (0.047 R)
• M22: 4,881,977 km (0.119 R)
• M23: 5,047,432 km (0.077 R)
• M24: 5,703,419 km (0.108 R)
• M25: 6,003,662 km (0.091 R)
• M26: 6,130,371 km (0.081 R)
• M27: 7,554,692 km (0.111 R)
• M28: 7,774,153 km (0.102 R)
• M29: 8,051,507 km (0.078 R)
• M30: 8,360,427 km (0.11 R)
• M31: 8,874,445 km (0.115 R)
• M32: 9,135,344 km (0.032 R)
• M33: 10,508,054 km (0.101 R)
• M34: 10,845,696 km (0.092 R)
• M35: 11,093,729 km (0.096 R)
• M36: 11,532,051 km (0.088 R)
• M37: 11,816,885 km (0.071 R)
• M38: 12,040,085 km (0.054 R)
• M39: 12,361,422 km (0.093 R)
• M40: 12,620,376 km (0.026 R)
• M41: 12,946,798 km (0.118 R)
• M42: 13,143,968 km (0.056 R)
• M43: 13,342,036 km (0.038 R)
• M44: 13,674,592 km (0.078 R)
• M45: 14,585,942 km (0.082 R)
• M46: 15,066,301 km (0.119 R)
• M47: 15,204,529 km (0.106 R)
• M48: 15,656,464 km (0.047 R)
• M49: 16,502,740 km (0.067 R)
• M50: 16,823,926 km (0.1 R)
• M51: 17,111,154 km (0.094 R)
• M52: 17,799,903 km (0.046 R)
• M53: 17,946,060 km (0.109 R)
• M54: 18,313,173 km (0.078 R)
• M55: 18,534,578 km (0.076 R)
• M56: 19,617,666 km (0.109 R)
• M57: 20,223,987 km (0.047 R)
• M58: 20,376,427 km (0.089 R)
• M59: 20,567,762 km (0.097 R)
• M60: 21,067,719 km (0.11 R)
• M61: 21,260,999 km (0.082 R)
• M62: 21,377,386 km (0.06 R)
• M63: 22,158,137 km (0.119 R)
• M64: 22,512,535 km (0.082 R)
• M65: 22,631,166 km (0.05 R)
• M66: 23,627,189 km (0.064 R)
• M67: 24,150,931 km (0.094 R)
• M68: 24,353,337 km (0.059 R)
• M69: 24,678,263 km (0.094 R)
• M70: 24,841,325 km (0.106 R)
• M71: 25,086,665 km (0.11 R)
• M72: 25,209,635 km (0.032 R)
• M73: 26,034,368 km (0.111 R)
• M74: 26,575,164 km (0.088 R)
• M75: 27,752,649 km (0.077 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.27 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 97.8

Radius: 6.8

Gravity: 2.12 G

Time & Orbit

Eccentricity (e): 0.148

Orbit Range: 7.05 AU - 9.49 AU

Year: 15356 Days

Day: 24 Hours

Environment

Temp: -229 °C

Axial Tilt: 8.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 38,667,789 km

• M1: 108,309 km (0.083 R)
• M2: 240,404 km (0.103 R)
• M3: 456,423 km (0.12 R)
• M4: 635,791 km (0.082 R)
• M5: 865,573 km (0.037 R)
• M6: 1,043,146 km (0.044 R)
• M7: 1,331,271 km (0.114 R)
• M8: 2,193,254 km (0.078 R)
• M9: 2,313,830 km (0.111 R)
• M10: 2,374,866 km (0.117 R)
• M11: 2,436,501 km (0.11 R)
• M12: 2,624,545 km (0.101 R)
• M13: 2,709,666 km (0.099 R)
• M14: 3,059,426 km (0.073 R)
• M15: 3,540,084 km (0.087 R)
• M16: 3,995,161 km (0.079 R)
• M17: 4,068,763 km (0.08 R)
• M18: 4,392,642 km (0.049 R)
• M19: 4,519,501 km (0.076 R)
• M20: 4,621,826 km (0.034 R)
• M21: 4,725,049 km (0.071 R)
• M22: 4,776,810 km (0.107 R)
• M23: 5,332,715 km (0.084 R)
• M24: 6,620,454 km (0.081 R)
• M25: 6,766,012 km (0.102 R)
• M26: 8,185,397 km (0.092 R)
• M27: 8,279,045 km (0.109 R)
• M28: 8,467,389 km (0.025 R)
• M29: 8,752,523 km (0.05 R)
• M30: 9,040,947 km (0.082 R)
• M31: 9,495,725 km (0.107 R)
• M32: 10,427,570 km (0.077 R)
• M33: 12,162,905 km (0.102 R)
• M34: 12,772,965 km (0.086 R)
• M35: 12,954,278 km (0.105 R)
• M36: 13,873,856 km (0.029 R)
• M37: 14,548,842 km (0.1 R)
• M38: 15,311,342 km (0.086 R)
• M39: 16,008,767 km (0.091 R)
• M40: 16,086,857 km (0.064 R)
• M41: 16,756,009 km (0.065 R)
• M42: 17,074,054 km (0.11 R)
• M43: 17,353,951 km (0.076 R)
• M44: 19,397,309 km (0.103 R)
• M45: 20,447,037 km (0.102 R)
• M46: 20,489,523 km (0.106 R)
• M47: 20,574,345 km (0.085 R)
• M48: 21,257,259 km (0.091 R)
• M49: 21,386,212 km (0.066 R)
• M50: 21,817,653 km (0.054 R)
• M51: 21,991,037 km (0.082 R)
• M52: 22,121,486 km (0.082 R)
• M53: 22,164,869 km (0.089 R)
• M54: 22,645,378 km (0.079 R)
• M55: 23,527,706 km (0.083 R)
• M56: 23,572,136 km (0.104 R)
• M57: 23,661,147 km (0.087 R)
• M58: 23,973,208 km (0.117 R)
• M59: 24,196,857 km (0.106 R)
• M60: 24,331,495 km (0.112 R)
• M61: 24,646,548 km (0.049 R)
• M62: 25,235,066 km (0.051 R)
• M63: 25,417,127 km (0.1 R)
• M64: 25,873,999 km (0.117 R)
• M65: 26,287,637 km (0.118 R)
• M66: 26,426,015 km (0.039 R)
• M67: 27,028,296 km (0.111 R)
• M68: 27,168,021 km (0.104 R)
• M69: 27,635,215 km (0.118 R)
• M70: 29,052,804 km (0.093 R)
• M71: 31,614,219 km (0.101 R)
• M72: 31,712,355 km (0.088 R)
• M73: 32,056,430 km (0.106 R)
• M74: 32,204,233 km (0.103 R)
• M75: 33,095,986 km (0.109 R)

Planet 7 - Ice Giant

Semi-Major Axis: 8.92 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 538.8

Radius: 6.5

Gravity: 12.75 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 7.08 AU - 10.76 AU

Year: 17201 Days

Day: 17.4 Hours

Environment

Temp: -233 °C

Axial Tilt: 6.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 38,667,789 km

• M1: 174,880 km (0.091 R)
• M2: 273,914 km (0.119 R)
• M3: 316,699 km (0.085 R)
• M4: 378,034 km (0.084 R)
• M5: 514,168 km (0.118 R)
• M6: 607,517 km (0.034 R)
• M7: 706,700 km (0.106 R)
• M8: 921,523 km (0.099 R)
• M9: 1,132,157 km (0.111 R)
• M10: 1,281,007 km (0.093 R)
• M11: 1,357,900 km (0.077 R)
• M12: 1,680,882 km (0.082 R)
• M13: 1,909,168 km (0.091 R)
• M14: 3,404,100 km (0.075 R)
• M15: 3,475,458 km (0.062 R)
• M16: 3,729,625 km (0.039 R)
• M17: 3,914,827 km (0.103 R)
• M18: 4,255,760 km (0.104 R)
• M19: 4,566,924 km (0.104 R)
• M20: 4,845,176 km (0.108 R)
• M21: 5,712,694 km (0.056 R)
• M22: 5,883,235 km (0.111 R)
• M23: 6,055,572 km (0.09 R)
• M24: 6,186,022 km (0.092 R)
• M25: 6,493,744 km (0.119 R)
• M26: 6,582,606 km (0.096 R)
• M27: 6,627,186 km (0.094 R)
• M28: 6,761,525 km (0.053 R)
• M29: 7,078,672 km (0.111 R)
• M30: 7,261,929 km (0.107 R)
• M31: 7,727,179 km (0.091 R)
• M32: 8,010,966 km (0.067 R)
• M33: 8,154,131 km (0.09 R)
• M34: 8,588,713 km (0.113 R)
• M35: 8,735,169 km (0.092 R)
• M36: 9,030,775 km (0.039 R)
• M37: 9,530,731 km (0.119 R)
• M38: 9,581,295 km (0.073 R)
• M39: 9,784,150 km (0.075 R)
• M40: 9,835,013 km (0.08 R)
• M41: 11,350,140 km (0.086 R)
• M42: 12,271,663 km (0.097 R)
• M43: 12,824,876 km (0.103 R)
• M44: 12,992,425 km (0.063 R)
• M45: 13,499,562 km (0.104 R)
• M46: 13,669,954 km (0.108 R)
• M47: 14,591,028 km (0.108 R)
• M48: 15,472,758 km (0.103 R)
• M49: 16,614,040 km (0.102 R)
• M50: 16,857,735 km (0.101 R)
• M51: 17,225,596 km (0.105 R)
• M52: 18,533,680 km (0.078 R)
• M53: 18,976,789 km (0.08 R)
• M54: 20,261,984 km (0.109 R)
• M55: 20,587,659 km (0.115 R)
• M56: 20,718,408 km (0.074 R)
• M57: 24,144,648 km (0.034 R)
• M58: 24,213,612 km (0.058 R)
• M59: 24,767,274 km (0.076 R)
• M60: 26,524,301 km (0.036 R)
• M61: 28,612,388 km (0.111 R)
• M62: 29,124,162 km (0.089 R)
• M63: 29,418,122 km (0.025 R)
• M64: 29,934,684 km (0.118 R)
• M65: 33,326,666 km (0.065 R)
• M66: 33,788,175 km (0.043 R)
• M67: 33,942,410 km (0.101 R)
• M68: 34,019,603 km (0.12 R)
• M69: 34,096,945 km (0.081 R)
• M70: 34,484,104 km (0.116 R)
• M71: 38,034,660 km (0.103 R)
• M72: 38,597,298 km (0.066 R)
• M73: 38,677,931 km (0.085 R)
• M74: 38,758,564 km (0.061 R)
• M75: 39,162,778 km (0.098 R)
• M76: 39,324,792 km (0.105 R)
• M77: 41,782,236 km (0.118 R)
• M78: 41,947,841 km (0.091 R)
• M79: 43,783,706 km (0.102 R)
• M80: 44,036,078 km (0.025 R)
• M81: 46,072,404 km (0.054 R)
• M82: 48,486,615 km (0.077 R)
• M83: 53,976,857 km (0.09 R)
• M84: 55,152,696 km (0.082 R)
• M85: 55,789,384 km (0.053 R)
• M86: 57,713,961 km (0.116 R)
• M87: 57,806,113 km (0.073 R)
• M88: 58,823,379 km (0.104 R)
• M89: 60,688,266 km (0.089 R)
• M90: 62,761,692 km (0.035 R)
• M91: 62,951,382 km (0.076 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.95 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 65.7

Radius: 3.4

Gravity: 5.68 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 10.36 AU - 11.54 AU

Year: 23396 Days

Day: 20.8 Hours

Environment

Temp: -225 °C

Axial Tilt: 16.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 38,667,789 km

• M1: 120,426 km (0.057 R)
• M2: 223,200 km (0.075 R)
• M3: 253,120 km (0.076 R)
• M4: 410,945 km (0.026 R)
• M5: 772,972 km (0.076 R)
• M6: 949,198 km (0.11 R)
• M7: 1,085,183 km (0.114 R)
• M8: 1,120,189 km (0.055 R)
• M9: 1,394,252 km (0.109 R)
• M10: 2,131,022 km (0.116 R)
• M11: 2,331,184 km (0.114 R)
• M12: 2,491,104 km (0.099 R)
• M13: 2,845,800 km (0.104 R)
• M14: 3,115,824 km (0.109 R)
• M15: 3,601,270 km (0.08 R)
• M16: 5,104,130 km (0.113 R)
• M17: 6,136,953 km (0.056 R)
• M18: 6,420,890 km (0.103 R)
• M19: 6,709,016 km (0.096 R)
• M20: 7,067,003 km (0.076 R)
• M21: 7,099,915 km (0.09 R)
• M22: 7,498,144 km (0.113 R)
• M23: 7,903,405 km (0.077 R)
• M24: 7,937,513 km (0.1 R)
• M25: 8,700,163 km (0.09 R)
• M26: 9,161,673 km (0.067 R)
• M27: 9,449,649 km (0.102 R)
• M28: 9,924,024 km (0.114 R)
• M29: 10,108,478 km (0.095 R)
• M30: 10,256,879 km (0.114 R)
• M31: 10,555,775 km (0.108 R)
• M32: 10,819,666 km (0.118 R)
• M33: 11,009,655 km (0.091 R)
• M34: 12,250,420 km (0.114 R)
• M35: 12,687,096 km (0.067 R)
• M36: 13,780,507 km (0.083 R)
• M37: 14,484,215 km (0.115 R)
• M38: 15,030,248 km (0.059 R)
• M39: 15,072,434 km (0.04 R)
• M40: 15,242,078 km (0.07 R)
• M41: 15,497,442 km (0.059 R)
• M42: 16,272,209 km (0.119 R)
• M43: 16,839,634 km (0.111 R)
• M44: 17,725,253 km (0.102 R)
• M45: 18,580,355 km (0.058 R)
• M46: 20,190,477 km (0.116 R)
• M47: 20,424,148 km (0.099 R)
• M48: 20,470,973 km (0.081 R)
• M49: 20,705,692 km (0.119 R)
• M50: 21,035,854 km (0.106 R)
• M51: 21,083,127 km (0.09 R)
• M52: 21,844,730 km (0.109 R)
• M53: 22,566,839 km (0.07 R)
• M54: 22,760,867 km (0.053 R)
• M55: 23,738,489 km (0.066 R)
• M56: 23,837,074 km (0.115 R)
• M57: 24,779,840 km (0.105 R)
• M58: 25,029,968 km (0.064 R)
• M59: 26,038,856 km (0.054 R)
• M60: 26,242,159 km (0.101 R)
• M61: 26,650,561 km (0.034 R)
• M62: 26,701,724 km (0.105 R)
• M63: 26,855,511 km (0.107 R)
• M64: 28,096,126 km (0.038 R)
• M65: 28,148,186 km (0.081 R)
• M66: 28,356,875 km (0.037 R)
• M67: 29,144,059 km (0.109 R)
• M68: 29,672,887 km (0.103 R)
• M69: 30,847,380 km (0.074 R)
• M70: 31,656,705 km (0.099 R)
• M71: 31,873,771 km (0.119 R)
• M72: 32,746,824 km (0.067 R)
• M73: 33,351,648 km (0.091 R)
• M74: 33,960,063 km (0.113 R)
• M75: 35,412,808 km (0.114 R)
• M76: 35,863,846 km (0.086 R)
• M77: 36,316,828 km (0.067 R)
• M78: 37,802,036 km (0.101 R)
• M79: 38,205,202 km (0.087 R)
• M80: 38,551,970 km (0.116 R)
• M81: 38,667,758 km (0.097 R)

Kuiper Belt

Range: 30 - 50 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 537 - 12,283 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit