🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.66 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.65

Radius: 1.48

Gravity: 1.21 G

Time & Orbit

Eccentricity (e): 0.239

Orbit Range: 0.5 AU - 0.82 AU

Year: 204 Days

Day: 13 Hours

Environment

Temp: 151 °C

Axial Tilt: 0.2 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.97 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.82

Radius: 1.27

Gravity: 1.13 G

Time & Orbit

Eccentricity (e): 0.145

Orbit Range: 0.83 AU - 1.11 AU

Year: 364 Days

Day: 14.4 Hours

Environment

Temp: 22 °C

Axial Tilt: 18.7 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 78,131,562 km

• M1: 355,445 km (0.094 R)

Planet 3 - Gas Giant

Semi-Major Axis: 6.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 124.8

Radius: 9.1

Gravity: 1.51 G

Time & Orbit

Eccentricity (e): 0.145

Orbit Range: 5.22 AU - 7 AU

Year: 5751 Days

Day: 9.7 Hours

Environment

Temp: -152 °C

Axial Tilt: 39.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 78,131,562 km

• M1: 124,166 km (0.071 R)
• M2: 321,935 km (0.028 R)
• M3: 387,758 km (0.085 R)
• M4: 766,988 km (0.11 R)
• M5: 1,112,709 km (0.113 R)
• M6: 1,308,682 km (0.108 R)
• M7: 1,410,858 km (0.113 R)
• M8: 1,599,500 km (0.11 R)
• M9: 1,962,275 km (0.118 R)
• M10: 2,106,787 km (0.037 R)
• M11: 2,448,020 km (0.031 R)
• M12: 2,762,923 km (0.079 R)
• M13: 2,985,076 km (0.113 R)
• M14: 3,368,495 km (0.104 R)
• M15: 3,526,171 km (0.07 R)
• M16: 3,638,071 km (0.115 R)
• M17: 4,047,370 km (0.074 R)
• M18: 4,114,241 km (0.107 R)
• M19: 4,232,273 km (0.032 R)
• M20: 4,300,041 km (0.09 R)
• M21: 4,506,037 km (0.113 R)
• M22: 4,645,014 km (0.03 R)
• M23: 4,732,678 km (0.075 R)
• M24: 4,856,396 km (0.075 R)
• M25: 4,927,604 km (0.069 R)
• M26: 5,125,073 km (0.099 R)
• M27: 5,197,479 km (0.08 R)
• M28: 5,343,486 km (0.079 R)
• M29: 5,602,141 km (0.088 R)
• M30: 5,770,588 km (0.049 R)
• M31: 5,846,135 km (0.086 R)
• M32: 5,921,832 km (0.11 R)
• M33: 6,074,422 km (0.077 R)
• M34: 7,036,785 km (0.109 R)
• M35: 7,097,222 km (0.096 R)
• M36: 7,649,238 km (0.119 R)
• M37: 7,940,954 km (0.111 R)
• M38: 8,172,681 km (0.116 R)
• M39: 8,342,624 km (0.073 R)
• M40: 8,470,979 km (0.081 R)
• M41: 8,903,168 km (0.037 R)
• M42: 9,034,215 km (0.105 R)
• M43: 9,386,967 km (0.094 R)
• M44: 9,564,989 km (0.041 R)
• M45: 9,992,390 km (0.119 R)
• M46: 10,242,667 km (0.115 R)
• M47: 10,541,115 km (0.042 R)
• M48: 11,193,810 km (0.093 R)
• M49: 12,003,733 km (0.061 R)
• M50: 12,586,866 km (0.03 R)
• M51: 12,832,655 km (0.088 R)
• M52: 13,353,704 km (0.108 R)
• M53: 13,579,298 km (0.102 R)
• M54: 13,705,110 km (0.026 R)
• M55: 13,957,781 km (0.053 R)
• M56: 14,340,003 km (0.115 R)
• M57: 14,648,025 km (0.075 R)
• M58: 14,803,009 km (0.095 R)
• M59: 14,984,321 km (0.09 R)
• M60: 15,114,471 km (0.091 R)
• M61: 15,375,669 km (0.112 R)
• M62: 15,664,692 km (0.057 R)
• M63: 15,743,830 km (0.117 R)
• M64: 15,981,989 km (0.082 R)
• M65: 17,518,359 km (0.088 R)
• M66: 17,985,703 km (0.062 R)
• M67: 18,179,283 km (0.098 R)
• M68: 18,708,261 km (0.072 R)

Planet 4 - Gas Giant

Semi-Major Axis: 6.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 723.7

Radius: 8.9

Gravity: 9.14 G

Time & Orbit

Eccentricity (e): 0.132

Orbit Range: 5.58 AU - 7.28 AU

Year: 6209 Days

Day: 12.5 Hours

Environment

Temp: -169 °C

Axial Tilt: 18.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 78,131,562 km

• M1: 119,678 km (0.12 R)
• M2: 196,272 km (0.107 R)
• M3: 394,041 km (0.108 R)
• M4: 494,870 km (0.063 R)
• M5: 670,797 km (0.078 R)
• M6: 988,393 km (0.084 R)
• M7: 1,456,036 km (0.093 R)
• M8: 2,420,194 km (0.119 R)
• M9: 3,113,880 km (0.119 R)
• M10: 3,207,678 km (0.096 R)
• M11: 3,278,737 km (0.096 R)
• M12: 3,422,350 km (0.088 R)
• M13: 3,543,674 km (0.095 R)
• M14: 3,815,494 km (0.089 R)
• M15: 3,966,737 km (0.038 R)
• M16: 4,432,286 km (0.03 R)
• M17: 4,698,420 km (0.077 R)
• M18: 5,728,252 km (0.1 R)
• M19: 5,930,658 km (0.057 R)
• M20: 6,076,815 km (0.101 R)
• M21: 6,135,607 km (0.086 R)
• M22: 6,342,800 km (0.11 R)
• M23: 7,319,375 km (0.105 R)
• M24: 7,921,207 km (0.112 R)
• M25: 7,985,534 km (0.071 R)
• M26: 8,082,324 km (0.068 R)
• M27: 8,440,461 km (0.117 R)
• M28: 8,571,958 km (0.093 R)
• M29: 8,803,685 km (0.08 R)
• M30: 8,903,766 km (0.084 R)
• M31: 9,104,826 km (0.08 R)
• M32: 9,375,299 km (0.073 R)
• M33: 9,443,366 km (0.063 R)
• M34: 9,855,059 km (0.103 R)
• M35: 10,028,293 km (0.097 R)
• M36: 10,731,553 km (0.051 R)
• M37: 11,233,304 km (0.09 R)
• M38: 11,450,670 km (0.065 R)
• M39: 12,371,295 km (0.088 R)
• M40: 12,558,292 km (0.114 R)
• M41: 12,897,281 km (0.061 R)
• M42: 13,507,341 km (0.031 R)
• M43: 13,932,199 km (0.098 R)
• M44: 14,283,006 km (0.095 R)
• M45: 14,557,967 km (0.104 R)
• M46: 14,755,436 km (0.114 R)
• M47: 14,993,596 km (0.078 R)
• M48: 15,473,656 km (0.071 R)
• M49: 15,554,139 km (0.048 R)
• M50: 15,634,773 km (0.103 R)
• M51: 15,715,556 km (0.082 R)
• M52: 16,737,159 km (0.11 R)
• M53: 17,193,283 km (0.114 R)
• M54: 18,203,069 km (0.093 R)
• M55: 18,757,927 km (0.1 R)
• M56: 18,843,797 km (0.12 R)
• M57: 19,318,321 km (0.098 R)
• M58: 19,448,471 km (0.103 R)
• M59: 19,796,885 km (0.068 R)
• M60: 20,059,578 km (0.029 R)
• M61: 20,147,392 km (0.099 R)
• M62: 20,455,863 km (0.096 R)
• M63: 21,749,885 km (0.092 R)
• M64: 21,840,092 km (0.041 R)
• M65: 22,066,284 km (0.1 R)
• M66: 22,156,941 km (0.084 R)
• M67: 22,612,017 km (0.09 R)
• M68: 23,024,459 km (0.064 R)
• M69: 24,792,406 km (0.092 R)
• M70: 25,264,986 km (0.095 R)
• M71: 25,931,594 km (0.082 R)
• M72: 26,603,887 km (0.104 R)
• M73: 26,700,378 km (0.062 R)
• M74: 29,350,055 km (0.108 R)
• M75: 29,599,584 km (0.036 R)
• M76: 29,749,631 km (0.104 R)
• M77: 30,402,775 km (0.083 R)
• M78: 32,442,243 km (0.076 R)
• M79: 32,597,077 km (0.118 R)
• M80: 32,700,299 km (0.105 R)
• M81: 33,687,047 km (0.115 R)
• M82: 34,105,472 km (0.105 R)
• M83: 34,788,985 km (0.084 R)
• M84: 35,053,175 km (0.087 R)
• M85: 35,370,921 km (0.09 R)

Planet 5 - Ice Giant

Semi-Major Axis: 12.08 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 182.7

Radius: 3.5

Gravity: 14.91 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 9.97 AU - 14.19 AU

Year: 15988 Days

Day: 16 Hours

Environment

Temp: -186 °C

Axial Tilt: 5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 78,131,562 km

• M1: 47,273 km (0.074 R)
• M2: 92,152 km (0.048 R)
• M3: 120,875 km (0.085 R)
• M4: 319,541 km (0.094 R)
• M5: 514,766 km (0.106 R)
• M6: 790,774 km (0.117 R)
• M7: 840,890 km (0.088 R)
• M8: 874,699 km (0.085 R)
• M9: 1,162,525 km (0.094 R)
• M10: 1,277,566 km (0.079 R)
• M11: 1,602,044 km (0.076 R)
• M12: 1,773,483 km (0.101 R)
• M13: 2,322,507 km (0.118 R)
• M14: 3,288,760 km (0.064 R)
• M15: 3,506,275 km (0.066 R)
• M16: 4,844,577 km (0.033 R)
• M17: 4,998,663 km (0.115 R)
• M18: 5,470,345 km (0.079 R)
• M19: 5,630,714 km (0.104 R)
• M20: 6,088,035 km (0.064 R)
• M21: 6,523,215 km (0.102 R)
• M22: 6,591,133 km (0.072 R)
• M23: 6,761,674 km (0.084 R)
• M24: 6,796,082 km (0.103 R)
• M25: 7,107,395 km (0.07 R)
• M26: 7,247,269 km (0.059 R)
• M27: 7,388,040 km (0.12 R)
• M28: 7,458,800 km (0.053 R)
• M29: 7,565,314 km (0.046 R)
• M30: 7,636,672 km (0.085 R)
• M31: 7,672,276 km (0.067 R)
• M32: 7,887,847 km (0.041 R)
• M33: 8,546,526 km (0.089 R)
• M34: 9,108,715 km (0.102 R)
• M35: 9,222,559 km (0.089 R)
• M36: 10,585,396 km (0.094 R)
• M37: 11,188,425 km (0.025 R)
• M38: 11,269,656 km (0.081 R)
• M39: 11,310,497 km (0.09 R)
• M40: 11,885,401 km (0.068 R)
• M41: 12,301,732 km (0.053 R)
• M42: 12,596,141 km (0.105 R)
• M43: 12,638,327 km (0.074 R)
• M44: 12,765,336 km (0.04 R)
• M45: 13,709,598 km (0.106 R)
• M46: 16,674,029 km (0.112 R)
• M47: 16,813,305 km (0.12 R)
• M48: 17,046,378 km (0.062 R)
• M49: 17,562,790 km (0.112 R)
• M50: 17,609,913 km (0.093 R)
• M51: 17,894,000 km (0.117 R)
• M52: 18,851,875 km (0.043 R)
• M53: 18,996,985 km (0.078 R)
• M54: 19,483,477 km (0.089 R)
• M55: 20,319,580 km (0.103 R)
• M56: 23,155,955 km (0.068 R)
• M57: 23,623,149 km (0.104 R)
• M58: 24,990,324 km (0.092 R)
• M59: 26,816,615 km (0.109 R)
• M60: 27,910,774 km (0.112 R)
• M61: 27,965,976 km (0.1 R)
• M62: 28,241,984 km (0.094 R)
• M63: 29,691,587 km (0.093 R)
• M64: 30,255,571 km (0.09 R)
• M65: 30,595,757 km (0.101 R)
• M66: 32,199,595 km (0.082 R)
• M67: 32,372,979 km (0.068 R)
• M68: 32,488,768 km (0.094 R)
• M69: 32,662,750 km (0.082 R)
• M70: 32,778,838 km (0.103 R)
• M71: 33,595,792 km (0.076 R)
• M72: 33,713,077 km (0.107 R)
• M73: 33,947,946 km (0.079 R)
• M74: 34,301,296 km (0.099 R)
• M75: 34,892,955 km (0.059 R)
• M76: 35,071,126 km (0.091 R)
• M77: 37,171,929 km (0.083 R)
• M78: 37,353,840 km (0.115 R)
• M79: 37,536,051 km (0.043 R)
• M80: 37,657,674 km (0.108 R)
• M81: 38,268,033 km (0.073 R)
• M82: 38,574,409 km (0.111 R)
• M83: 39,869,927 km (0.042 R)
• M84: 40,056,176 km (0.063 R)
• M85: 40,118,409 km (0.069 R)
• M86: 40,429,573 km (0.068 R)
• M87: 40,491,955 km (0.053 R)
• M88: 40,804,166 km (0.098 R)
• M89: 41,117,124 km (0.088 R)
• M90: 41,430,831 km (0.113 R)
• M91: 41,934,527 km (0.11 R)
• M92: 42,187,198 km (0.103 R)

Planet 6 - Ice Giant

Semi-Major Axis: 12.95 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 432.4

Radius: 5.1

Gravity: 16.62 G

Time & Orbit

Eccentricity (e): 0.202

Orbit Range: 10.33 AU - 15.57 AU

Year: 17746 Days

Day: 21.7 Hours

Environment

Temp: -183 °C

Axial Tilt: 21.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 78,131,562 km

• M1: 78,688 km (0.052 R)
• M2: 152,590 km (0.104 R)
• M3: 196,871 km (0.106 R)
• M4: 345,571 km (0.06 R)
• M5: 408,103 km (0.046 R)
• M6: 926,310 km (0.099 R)
• M7: 1,015,470 km (0.066 R)
• M8: 1,226,553 km (0.034 R)
• M9: 1,400,236 km (0.105 R)
• M10: 1,854,266 km (0.09 R)
• M11: 1,938,788 km (0.114 R)
• M12: 2,024,658 km (0.036 R)
• M13: 2,380,850 km (0.113 R)
• M14: 2,442,036 km (0.088 R)
• M15: 2,566,202 km (0.039 R)
• M16: 2,629,033 km (0.097 R)
• M17: 3,631,339 km (0.077 R)
• M18: 4,025,529 km (0.085 R)
• M19: 4,433,333 km (0.095 R)
• M20: 5,010,332 km (0.062 R)
• M21: 5,168,158 km (0.076 R)
• M22: 5,367,871 km (0.104 R)
• M23: 5,610,818 km (0.119 R)
• M24: 5,940,232 km (0.066 R)
• M25: 6,149,370 km (0.042 R)
• M26: 6,966,025 km (0.075 R)
• M27: 7,186,532 km (0.073 R)
• M28: 7,999,297 km (0.1 R)
• M29: 8,510,174 km (0.118 R)
• M30: 8,557,148 km (0.091 R)
• M31: 8,935,930 km (0.045 R)
• M32: 9,906,969 km (0.11 R)
• M33: 10,809,045 km (0.103 R)
• M34: 11,115,571 km (0.094 R)
• M35: 11,841,868 km (0.12 R)
• M36: 12,052,203 km (0.078 R)
• M37: 12,905,808 km (0.042 R)
• M38: 13,833,913 km (0.085 R)
• M39: 15,466,176 km (0.086 R)
• M40: 15,753,703 km (0.104 R)
• M41: 16,101,069 km (0.103 R)
• M42: 16,450,979 km (0.086 R)
• M43: 16,509,621 km (0.119 R)
• M44: 16,921,464 km (0.08 R)
• M45: 18,359,099 km (0.057 R)
• M46: 18,541,609 km (0.102 R)
• M47: 21,158,225 km (0.108 R)
• M48: 21,991,336 km (0.094 R)
• M49: 23,293,735 km (0.099 R)
• M50: 24,420,356 km (0.085 R)
• M51: 26,109,167 km (0.097 R)
• M52: 26,588,628 km (0.1 R)
• M53: 26,657,443 km (0.1 R)
• M54: 28,114,825 km (0.1 R)
• M55: 28,465,483 km (0.082 R)
• M56: 28,535,943 km (0.102 R)
• M57: 28,888,396 km (0.061 R)
• M58: 31,250,995 km (0.073 R)
• M59: 32,125,395 km (0.031 R)
• M60: 32,639,114 km (0.116 R)
• M61: 34,047,279 km (0.115 R)
• M62: 34,196,727 km (0.111 R)
• M63: 34,721,217 km (0.068 R)
• M64: 40,268,605 km (0.053 R)
• M65: 40,663,992 km (0.088 R)
• M66: 41,140,013 km (0.101 R)
• M67: 41,857,634 km (0.112 R)
• M68: 43,548,090 km (0.11 R)
• M69: 43,710,254 km (0.083 R)
• M70: 44,769,108 km (0.086 R)
• M71: 48,247,408 km (0.068 R)
• M72: 49,595,135 km (0.093 R)
• M73: 50,103,768 km (0.052 R)
• M74: 50,699,317 km (0.075 R)
• M75: 50,869,858 km (0.088 R)
• M76: 50,955,279 km (0.104 R)
• M77: 52,586,195 km (0.112 R)
• M78: 54,321,530 km (0.074 R)
• M79: 54,670,841 km (0.079 R)
• M80: 56,075,415 km (0.109 R)
• M81: 56,782,265 km (0.093 R)
• M82: 57,047,951 km (0.079 R)
• M83: 58,383,262 km (0.099 R)

Planet 7 - Ice Giant

Semi-Major Axis: 13.38 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 854.1

Radius: 3.8

Gravity: 59.15 G

Time & Orbit

Eccentricity (e): 0.057

Orbit Range: 12.62 AU - 14.14 AU

Year: 18637 Days

Day: 19.9 Hours

Environment

Temp: -182 °C

Axial Tilt: 17.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 78,131,562 km

• M1: 284,834 km (0.069 R)
• M2: 536,757 km (0.094 R)
• M3: 920,326 km (0.055 R)
• M4: 1,054,366 km (0.078 R)
• M5: 1,137,991 km (0.092 R)
• M6: 1,493,436 km (0.062 R)
• M7: 1,619,098 km (0.042 R)
• M8: 1,914,404 km (0.119 R)
• M9: 1,948,213 km (0.077 R)
• M10: 2,226,166 km (0.049 R)
• M11: 2,741,979 km (0.089 R)
• M12: 2,857,170 km (0.054 R)
• M13: 2,974,006 km (0.106 R)
• M14: 3,052,844 km (0.03 R)
• M15: 3,293,098 km (0.117 R)
• M16: 3,963,596 km (0.114 R)
• M17: 4,269,673 km (0.086 R)
• M18: 4,358,684 km (0.095 R)
• M19: 4,812,264 km (0.084 R)
• M20: 5,280,655 km (0.05 R)
• M21: 5,763,707 km (0.089 R)
• M22: 6,060,060 km (0.105 R)
• M23: 6,260,521 km (0.091 R)
• M24: 6,361,500 km (0.118 R)
• M25: 6,979,040 km (0.065 R)
• M26: 7,189,075 km (0.083 R)
• M27: 7,940,505 km (0.091 R)
• M28: 8,104,764 km (0.103 R)
• M29: 9,228,094 km (0.096 R)
• M30: 9,285,540 km (0.026 R)
• M31: 9,807,786 km (0.056 R)
• M32: 10,759,677 km (0.116 R)
• M33: 12,368,004 km (0.111 R)
• M34: 14,049,783 km (0.064 R)
• M35: 14,715,344 km (0.088 R)
• M36: 15,052,089 km (0.049 R)
• M37: 15,119,707 km (0.113 R)
• M38: 15,596,027 km (0.074 R)
• M39: 16,215,661 km (0.1 R)
• M40: 16,354,338 km (0.099 R)
• M41: 16,983,846 km (0.12 R)
• M42: 17,266,137 km (0.107 R)
• M43: 17,549,925 km (0.108 R)
• M44: 18,482,967 km (0.086 R)
• M45: 19,065,052 km (0.06 R)
• M46: 19,211,508 km (0.078 R)
• M47: 20,098,175 km (0.051 R)
• M48: 24,567,561 km (0.049 R)
• M49: 26,339,697 km (0.104 R)
• M50: 26,912,208 km (0.095 R)
• M51: 28,152,674 km (0.083 R)
• M52: 29,920,322 km (0.078 R)
• M53: 30,860,545 km (0.07 R)
• M54: 32,332,438 km (0.105 R)
• M55: 32,769,713 km (0.117 R)
• M56: 34,716,879 km (0.068 R)
• M57: 34,895,648 km (0.1 R)
• M58: 35,344,143 km (0.026 R)
• M59: 36,246,816 km (0.048 R)
• M60: 36,610,040 km (0.115 R)
• M61: 38,259,356 km (0.11 R)
• M62: 38,536,561 km (0.118 R)
• M63: 39,093,065 km (0.118 R)
• M64: 40,026,406 km (0.094 R)
• M65: 40,307,800 km (0.103 R)
• M66: 42,487,291 km (0.092 R)
• M67: 43,254,280 km (0.031 R)
• M68: 44,510,303 km (0.034 R)
• M69: 45,974,418 km (0.042 R)
• M70: 49,552,200 km (0.041 R)
• M71: 50,056,046 km (0.091 R)
• M72: 51,069,123 km (0.07 R)
• M73: 52,703,928 km (0.105 R)
• M74: 53,218,246 km (0.097 R)
• M75: 53,527,764 km (0.088 R)
• M76: 54,563,430 km (0.117 R)
• M77: 56,444,473 km (0.073 R)
• M78: 59,091,907 km (0.117 R)
• M79: 59,198,720 km (0.07 R)
• M80: 60,054,868 km (0.104 R)
• M81: 61,563,114 km (0.104 R)
• M82: 62,539,240 km (0.105 R)
• M83: 63,083,776 km (0.101 R)
• M84: 63,520,602 km (0.087 R)
• M85: 64,506,901 km (0.067 R)
• M86: 67,161,814 km (0.059 R)
• M87: 67,719,366 km (0.117 R)
• M88: 68,502,511 km (0.076 R)
• M89: 68,951,454 km (0.119 R)
• M90: 69,739,386 km (0.094 R)
• M91: 70,756,651 km (0.105 R)
• M92: 71,210,531 km (0.039 R)
• M93: 71,324,076 km (0.107 R)
• M94: 71,892,847 km (0.085 R)
• M95: 73,838,218 km (0.067 R)
• M96: 74,644,251 km (0.103 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: 260 - 16,412 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit