🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.96 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.68

Radius: 0.86

Gravity: 0.92 G

Time & Orbit

Eccentricity (e): 0.194

Orbit Range: 1.58 AU - 2.34 AU

Year: 1018 Days

Day: 31 Hours

Environment

Temp: -71 °C

Axial Tilt: 8.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 2.31 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.55

Radius: 1.19

Gravity: 1.09 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 2.17 AU - 2.45 AU

Year: 1302 Days

Day: 37.1 Hours

Environment

Temp: -81 °C

Axial Tilt: 2.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 89,246,068 km

• M1: 431,141 km (0.095 R)

Planet 3 - Terrestrial

Semi-Major Axis: 2.72 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.04

Radius: 1.56

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.01

Orbit Range: 2.69 AU - 2.75 AU

Year: 1664 Days

Day: 46.2 Hours

Environment

Temp: -107 °C

Axial Tilt: 25.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 4.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 44.4

Radius: 10.6

Gravity: 0.4 G

Time & Orbit

Eccentricity (e): 0.097

Orbit Range: 4.26 AU - 5.18 AU

Year: 3803 Days

Day: 9.2 Hours

Environment

Temp: -146 °C

Axial Tilt: 12.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (49)

Outer Limit: 89,246,068 km

• M1: 136,433 km (0.056 R)
• M2: 205,697 km (0.111 R)
• M3: 525,986 km (0.114 R)
• M4: 671,246 km (0.108 R)
• M5: 764,296 km (0.117 R)
• M6: 843,433 km (0.098 R)
• M7: 951,442 km (0.092 R)
• M8: 1,023,997 km (0.093 R)
• M9: 1,133,204 km (0.115 R)
• M10: 1,319,304 km (0.093 R)
• M11: 1,469,500 km (0.116 R)
• M12: 1,554,621 km (0.072 R)
• M13: 1,625,530 km (0.045 R)
• M14: 1,730,099 km (0.081 R)
• M15: 1,820,307 km (0.079 R)
• M16: 2,005,659 km (0.074 R)
• M17: 2,135,659 km (0.12 R)
• M18: 2,277,478 km (0.079 R)
• M19: 2,404,187 km (0.1 R)
• M20: 2,542,565 km (0.118 R)
• M21: 2,760,081 km (0.097 R)
• M22: 3,003,476 km (0.047 R)
• M23: 3,243,880 km (0.059 R)
• M24: 3,563,720 km (0.078 R)
• M25: 3,700,902 km (0.088 R)
• M26: 3,850,649 km (0.099 R)
• M27: 4,145,058 km (0.085 R)
• M28: 4,334,299 km (0.09 R)
• M29: 5,060,447 km (0.068 R)
• M30: 5,155,442 km (0.104 R)
• M31: 5,359,194 km (0.118 R)
• M32: 5,553,372 km (0.062 R)
• M33: 5,861,394 km (0.049 R)
• M34: 5,936,193 km (0.112 R)
• M35: 6,137,253 km (0.049 R)
• M36: 6,494,492 km (0.072 R)
• M37: 6,584,849 km (0.091 R)
• M38: 6,766,760 km (0.105 R)
• M39: 7,255,946 km (0.114 R)
• M40: 7,470,918 km (0.102 R)
• M41: 7,715,361 km (0.117 R)
• M42: 7,879,918 km (0.043 R)
• M43: 8,170,437 km (0.103 R)
• M44: 8,240,150 km (0.076 R)
• M45: 8,948,346 km (0.104 R)
• M46: 9,484,954 km (0.117 R)
• M47: 9,764,552 km (0.094 R)
• M48: 9,912,804 km (0.09 R)
• M49: 10,076,763 km (0.091 R)

Planet 5 - Gas Giant

Semi-Major Axis: 9.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 628.4

Radius: 11.8

Gravity: 4.51 G

Time & Orbit

Eccentricity (e): 0.22

Orbit Range: 7.59 AU - 11.87 AU

Year: 11256 Days

Day: 14.2 Hours

Environment

Temp: -172 °C

Axial Tilt: 1.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 89,246,068 km

• M1: 189,690 km (0.051 R)
• M2: 288,873 km (0.071 R)
• M3: 434,432 km (0.045 R)
• M4: 725,550 km (0.117 R)
• M5: 1,018,163 km (0.114 R)
• M6: 1,326,634 km (0.082 R)
• M7: 1,480,869 km (0.105 R)
• M8: 1,688,362 km (0.058 R)
• M9: 1,955,095 km (0.102 R)
• M10: 2,055,475 km (0.081 R)
• M11: 2,892,624 km (0.089 R)
• M12: 3,124,501 km (0.083 R)
• M13: 3,272,753 km (0.105 R)
• M14: 3,575,988 km (0.103 R)
• M15: 3,762,536 km (0.092 R)
• M16: 4,080,581 km (0.08 R)
• M17: 4,473,724 km (0.102 R)
• M18: 5,617,400 km (0.093 R)
• M19: 5,798,264 km (0.113 R)
• M20: 6,018,023 km (0.061 R)
• M21: 6,203,225 km (0.107 R)
• M22: 6,731,755 km (0.119 R)
• M23: 7,196,555 km (0.12 R)
• M24: 7,275,094 km (0.106 R)
• M25: 7,472,414 km (0.109 R)
• M26: 7,591,793 km (0.114 R)
• M27: 8,569,265 km (0.096 R)
• M28: 9,413,895 km (0.091 R)
• M29: 9,759,316 km (0.102 R)
• M30: 10,551,587 km (0.06 R)
• M31: 10,730,356 km (0.078 R)
• M32: 11,410,129 km (0.101 R)
• M33: 11,871,189 km (0.068 R)
• M34: 12,103,964 km (0.078 R)
• M35: 12,197,462 km (0.079 R)
• M36: 14,464,169 km (0.107 R)
• M37: 14,962,929 km (0.064 R)
• M38: 15,467,373 km (0.064 R)
• M39: 15,619,962 km (0.075 R)
• M40: 16,183,198 km (0.086 R)
• M41: 16,389,644 km (0.106 R)
• M42: 17,224,250 km (0.058 R)
• M43: 18,772,139 km (0.047 R)
• M44: 19,700,095 km (0.077 R)
• M45: 19,920,602 km (0.092 R)
• M46: 20,031,304 km (0.119 R)
• M47: 20,475,610 km (0.1 R)
• M48: 22,515,078 km (0.119 R)
• M49: 22,977,036 km (0.105 R)
• M50: 23,267,406 km (0.117 R)
• M51: 23,793,093 km (0.095 R)
• M52: 24,381,760 km (0.062 R)
• M53: 24,559,333 km (0.112 R)
• M54: 24,915,675 km (0.06 R)
• M55: 26,297,660 km (0.095 R)
• M56: 26,540,607 km (0.063 R)
• M57: 26,906,374 km (0.048 R)
• M58: 27,827,897 km (0.106 R)
• M59: 28,323,814 km (0.032 R)
• M60: 30,018,458 km (0.097 R)
• M61: 30,335,905 km (0.118 R)
• M62: 30,910,211 km (0.114 R)
• M63: 31,745,865 km (0.113 R)
• M64: 33,439,612 km (0.106 R)
• M65: 33,834,700 km (0.078 R)
• M66: 34,098,890 km (0.055 R)
• M67: 34,363,828 km (0.039 R)
• M68: 34,895,648 km (0.068 R)
• M69: 35,363,291 km (0.098 R)
• M70: 35,564,351 km (0.032 R)
• M71: 36,439,947 km (0.097 R)
• M72: 37,527,374 km (0.038 R)
• M73: 38,075,052 km (0.043 R)
• M74: 38,832,466 km (0.048 R)
• M75: 39,455,840 km (0.095 R)
• M76: 40,222,230 km (0.074 R)
• M77: 40,572,289 km (0.1 R)
• M78: 41,699,060 km (0.11 R)
• M79: 42,836,153 km (0.106 R)
• M80: 43,050,527 km (0.075 R)
• M81: 43,623,786 km (0.065 R)
• M82: 44,995,599 km (0.042 R)
• M83: 47,707,359 km (0.061 R)
• M84: 48,374,865 km (0.118 R)

Planet 6 - Gas Giant

Semi-Major Axis: 10.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 939.3

Radius: 14.3

Gravity: 4.59 G

Time & Orbit

Eccentricity (e): 0.194

Orbit Range: 8.63 AU - 12.79 AU

Year: 12998 Days

Day: 13.5 Hours

Environment

Temp: -187 °C

Axial Tilt: 17 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 89,246,068 km

• M1: 271,520 km (0.094 R)
• M2: 971,489 km (0.049 R)
• M3: 1,107,323 km (0.106 R)
• M4: 1,450,950 km (0.112 R)
• M5: 1,717,683 km (0.107 R)
• M6: 2,029,744 km (0.109 R)
• M7: 2,709,068 km (0.118 R)
• M8: 3,040,427 km (0.102 R)
• M9: 3,142,453 km (0.098 R)
• M10: 3,315,089 km (0.045 R)
• M11: 7,291,251 km (0.116 R)
• M12: 8,562,833 km (0.1 R)
• M13: 8,952,834 km (0.098 R)
• M14: 9,100,637 km (0.074 R)
• M15: 10,622,496 km (0.089 R)
• M16: 10,883,843 km (0.115 R)
• M17: 11,147,285 km (0.044 R)
• M18: 11,626,896 km (0.117 R)
• M19: 12,386,404 km (0.118 R)
• M20: 12,606,313 km (0.11 R)
• M21: 12,994,370 km (0.09 R)
• M22: 13,274,118 km (0.066 R)
• M23: 14,067,585 km (0.089 R)
• M24: 14,993,447 km (0.107 R)
• M25: 16,842,925 km (0.027 R)
• M26: 17,393,296 km (0.09 R)
• M27: 17,763,550 km (0.098 R)
• M28: 18,763,463 km (0.114 R)
• M29: 19,206,721 km (0.044 R)
• M30: 19,653,420 km (0.076 R)
• M31: 19,845,953 km (0.115 R)
• M32: 20,427,290 km (0.057 R)
• M33: 20,557,291 km (0.115 R)
• M34: 21,276,856 km (0.092 R)
• M35: 21,474,475 km (0.101 R)
• M36: 22,338,253 km (0.072 R)
• M37: 25,345,320 km (0.101 R)
• M38: 25,835,403 km (0.12 R)
• M39: 26,187,406 km (0.119 R)
• M40: 27,252,693 km (0.111 R)
• M41: 28,404,746 km (0.096 R)
• M42: 29,059,835 km (0.091 R)
• M43: 29,793,463 km (0.11 R)
• M44: 31,129,372 km (0.105 R)
• M45: 31,579,063 km (0.114 R)
• M46: 31,879,905 km (0.091 R)
• M47: 32,333,186 km (0.094 R)
• M48: 32,484,729 km (0.076 R)
• M49: 33,017,148 km (0.094 R)
• M50: 34,553,817 km (0.092 R)
• M51: 35,643,488 km (0.077 R)
• M52: 36,586,403 km (0.072 R)
• M53: 37,219,651 km (0.077 R)
• M54: 37,696,868 km (0.069 R)
• M55: 38,016,110 km (0.111 R)
• M56: 39,140,787 km (0.088 R)
• M57: 39,626,232 km (0.055 R)
• M58: 39,869,628 km (0.093 R)
• M59: 40,357,915 km (0.044 R)
• M60: 41,094,236 km (0.095 R)
• M61: 42,331,111 km (0.08 R)
• M62: 43,245,902 km (0.095 R)
• M63: 43,413,003 km (0.115 R)
• M64: 43,747,653 km (0.051 R)
• M65: 44,419,797 km (0.097 R)
• M66: 44,756,990 km (0.028 R)
• M67: 45,604,013 km (0.038 R)
• M68: 49,305,813 km (0.115 R)
• M69: 49,567,758 km (0.1 R)
• M70: 49,830,004 km (0.088 R)
• M71: 50,443,953 km (0.067 R)
• M72: 52,656,805 km (0.096 R)
• M73: 52,835,275 km (0.105 R)
• M74: 53,820,078 km (0.096 R)
• M75: 53,999,745 km (0.073 R)
• M76: 54,359,677 km (0.075 R)
• M77: 54,449,885 km (0.068 R)
• M78: 54,630,300 km (0.103 R)
• M79: 55,716,829 km (0.113 R)
• M80: 55,898,740 km (0.095 R)
• M81: 56,993,647 km (0.114 R)
• M82: 57,451,865 km (0.113 R)
• M83: 57,819,427 km (0.111 R)
• M84: 58,187,737 km (0.12 R)
• M85: 58,926,751 km (0.11 R)
• M86: 59,297,454 km (0.091 R)
• M87: 59,668,756 km (0.116 R)
• M88: 62,857,136 km (0.101 R)
• M89: 63,425,458 km (0.053 R)

Planet 7 - Ice Giant

Semi-Major Axis: 14.15 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 496.1

Radius: 3.6

Gravity: 38.28 G

Time & Orbit

Eccentricity (e): 0.076

Orbit Range: 13.07 AU - 15.23 AU

Year: 19740 Days

Day: 24.8 Hours

Environment

Temp: -185 °C

Axial Tilt: 6.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 89,246,068 km

• M1: 61,934 km (0.048 R)
• M2: 84,373 km (0.036 R)
• M3: 280,945 km (0.06 R)
• M4: 345,122 km (0.088 R)
• M5: 566,078 km (0.119 R)
• M6: 669,600 km (0.094 R)
• M7: 756,666 km (0.062 R)
• M8: 1,634,207 km (0.049 R)
• M9: 2,153,312 km (0.086 R)
• M10: 2,582,059 km (0.091 R)
• M11: 3,402,454 km (0.031 R)
• M12: 3,743,687 km (0.086 R)
• M13: 4,016,703 km (0.087 R)
• M14: 4,499,455 km (0.073 R)
• M15: 5,000,309 km (0.099 R)
• M16: 5,128,215 km (0.118 R)
• M17: 5,828,782 km (0.043 R)
• M18: 6,373,767 km (0.062 R)
• M19: 6,887,336 km (0.101 R)
• M20: 7,511,309 km (0.037 R)
• M21: 8,253,614 km (0.103 R)
• M22: 8,710,037 km (0.086 R)
• M23: 8,915,584 km (0.097 R)
• M24: 8,967,196 km (0.112 R)
• M25: 9,018,956 km (0.09 R)
• M26: 9,806,589 km (0.093 R)
• M27: 9,913,252 km (0.118 R)
• M28: 10,780,471 km (0.092 R)
• M29: 11,446,780 km (0.091 R)
• M30: 11,955,114 km (0.099 R)
• M31: 12,012,111 km (0.092 R)
• M32: 12,069,107 km (0.048 R)
• M33: 13,583,337 km (0.104 R)
• M34: 14,241,717 km (0.106 R)
• M35: 14,849,234 km (0.054 R)
• M36: 14,971,755 km (0.094 R)
• M37: 15,279,478 km (0.117 R)
• M38: 18,076,360 km (0.076 R)
• M39: 18,733,543 km (0.095 R)
• M40: 19,065,052 km (0.119 R)
• M41: 19,131,623 km (0.075 R)
• M42: 19,734,054 km (0.092 R)
• M43: 20,410,535 km (0.032 R)
• M44: 20,615,035 km (0.11 R)
• M45: 20,683,252 km (0.087 R)
• M46: 21,647,410 km (0.084 R)
• M47: 22,626,080 km (0.03 R)
• M48: 23,690,618 km (0.064 R)
• M49: 23,762,126 km (0.109 R)
• M50: 26,533,576 km (0.037 R)
• M51: 27,279,770 km (0.095 R)
• M52: 27,504,915 km (0.115 R)
• M53: 27,957,149 km (0.058 R)
• M54: 28,716,209 km (0.102 R)
• M55: 30,099,690 km (0.115 R)
• M56: 30,410,106 km (0.114 R)
• M57: 32,056,879 km (0.075 R)
• M58: 32,612,336 km (0.107 R)
• M59: 33,652,041 km (0.049 R)
• M60: 35,028,042 km (0.11 R)
• M61: 35,763,914 km (0.069 R)
• M62: 37,001,687 km (0.1 R)
• M63: 37,500,745 km (0.086 R)
• M64: 37,584,221 km (0.092 R)
• M65: 38,589,668 km (0.049 R)
• M66: 39,943,978 km (0.065 R)
• M67: 40,199,641 km (0.115 R)
• M68: 41,313,846 km (0.068 R)
• M69: 42,351,307 km (0.07 R)
• M70: 43,572,474 km (0.112 R)
• M71: 44,187,471 km (0.053 R)
• M72: 44,275,584 km (0.112 R)
• M73: 45,960,056 km (0.109 R)
• M74: 47,846,336 km (0.119 R)
• M75: 48,117,856 km (0.087 R)
• M76: 48,571,437 km (0.11 R)
• M77: 49,483,086 km (0.059 R)
• M78: 49,757,598 km (0.08 R)
• M79: 51,230,539 km (0.085 R)
• M80: 51,879,345 km (0.102 R)
• M81: 52,344,594 km (0.064 R)
• M82: 53,748,271 km (0.114 R)
• M83: 54,785,583 km (0.118 R)
• M84: 55,544,193 km (0.104 R)
• M85: 56,401,688 km (0.066 R)
• M86: 56,592,725 km (0.095 R)
• M87: 56,688,468 km (0.112 R)
• M88: 57,071,588 km (0.077 R)
• M89: 58,322,824 km (0.096 R)
• M90: 58,516,105 km (0.062 R)
• M91: 61,736,049 km (0.058 R)
• M92: 62,525,328 km (0.109 R)
• M93: 64,912,910 km (0.06 R)
• M94: 65,514,443 km (0.092 R)
• M95: 66,017,092 km (0.103 R)

Planet 8 - Ice Giant

Semi-Major Axis: 15.69 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 832.3

Radius: 3.5

Gravity: 67.94 G

Time & Orbit

Eccentricity (e): 0.12

Orbit Range: 13.81 AU - 17.57 AU

Year: 23048 Days

Day: 22.4 Hours

Environment

Temp: -197 °C

Axial Tilt: 24.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 89,246,068 km

• M1: 277,205 km (0.109 R)
• M2: 396,135 km (0.046 R)
• M3: 461,509 km (0.034 R)
• M4: 678,426 km (0.099 R)
• M5: 704,307 km (0.084 R)
• M6: 1,321,847 km (0.097 R)
• M7: 1,731,147 km (0.059 R)
• M8: 1,875,658 km (0.11 R)
• M9: 2,864,350 km (0.081 R)
• M10: 3,797,991 km (0.05 R)
• M11: 3,985,736 km (0.11 R)
• M12: 5,486,951 km (0.118 R)
• M13: 5,752,487 km (0.117 R)
• M14: 6,240,924 km (0.115 R)
• M15: 7,902,657 km (0.11 R)
• M16: 8,689,243 km (0.082 R)
• M17: 9,185,608 km (0.113 R)
• M18: 9,311,121 km (0.106 R)
• M19: 9,754,828 km (0.025 R)
• M20: 10,140,791 km (0.092 R)
• M21: 10,794,833 km (0.115 R)
• M22: 11,193,810 km (0.11 R)
• M23: 13,048,076 km (0.09 R)
• M24: 13,189,147 km (0.114 R)
• M25: 13,758,666 km (0.092 R)
• M26: 14,408,818 km (0.045 R)
• M27: 14,700,983 km (0.038 R)
• M28: 14,995,092 km (0.046 R)
• M29: 15,216,946 km (0.066 R)
• M30: 16,494,661 km (0.119 R)
• M31: 20,364,309 km (0.107 R)
• M32: 20,856,636 km (0.113 R)
• M33: 22,104,282 km (0.115 R)
• M34: 22,272,580 km (0.058 R)
• M35: 22,356,803 km (0.077 R)
• M36: 23,805,210 km (0.104 R)
• M37: 24,933,178 km (0.038 R)
• M38: 25,547,726 km (0.082 R)
• M39: 26,434,243 km (0.099 R)
• M40: 28,694,368 km (0.118 R)
• M41: 30,172,843 km (0.104 R)
• M42: 31,581,457 km (0.107 R)
• M43: 32,532,301 km (0.117 R)
• M44: 32,723,487 km (0.099 R)
• M45: 34,170,098 km (0.093 R)
• M46: 34,656,890 km (0.08 R)
• M47: 34,754,577 km (0.07 R)
• M48: 34,852,265 km (0.101 R)
• M49: 36,032,293 km (0.069 R)
• M50: 37,926,950 km (0.107 R)
• M51: 38,430,945 km (0.031 R)
• M52: 38,532,073 km (0.106 R)
• M53: 38,633,201 km (0.032 R)
• M54: 38,734,479 km (0.094 R)
• M55: 40,058,570 km (0.104 R)
• M56: 40,469,066 km (0.082 R)
• M57: 42,124,516 km (0.036 R)
• M58: 42,333,056 km (0.12 R)
• M59: 44,861,559 km (0.113 R)
• M60: 46,251,473 km (0.078 R)
• M61: 46,466,595 km (0.091 R)
• M62: 47,005,745 km (0.072 R)
• M63: 48,526,408 km (0.116 R)
• M64: 48,963,832 km (0.105 R)
• M65: 50,284,033 km (0.045 R)
• M66: 50,837,545 km (0.073 R)
• M67: 51,504,453 km (0.097 R)
• M68: 51,950,553 km (0.09 R)
• M69: 52,846,794 km (0.057 R)
• M70: 53,861,217 km (0.094 R)
• M71: 61,021,121 km (0.097 R)
• M72: 62,084,912 km (0.12 R)
• M73: 64,470,998 km (0.108 R)
• M74: 64,591,125 km (0.115 R)
• M75: 70,442,197 km (0.076 R)
• M76: 70,565,764 km (0.112 R)
• M77: 71,931,144 km (0.046 R)
• M78: 72,180,374 km (0.109 R)
• M79: 72,804,497 km (0.111 R)
• M80: 72,929,560 km (0.095 R)
• M81: 73,054,624 km (0.059 R)
• M82: 74,940,156 km (0.045 R)
• M83: 75,192,827 km (0.064 R)
• M84: 77,351,225 km (0.083 R)
• M85: 77,990,008 km (0.047 R)
• M86: 78,245,969 km (0.098 R)
• M87: 78,630,436 km (0.099 R)
• M88: 79,916,679 km (0.086 R)
• M89: 80,562,343 km (0.102 R)
• M90: 81,599,056 km (0.038 R)
• M91: 82,640,257 km (0.107 R)
• M92: 84,078,940 km (0.084 R)
• M93: 84,998,817 km (0.106 R)
• M94: 86,186,325 km (0.05 R)

Kuiper Belt

Range: 30 - 46 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 405 - 17,650 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit