🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.57 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.81

Radius: 1.87

Gravity: 1.38 G

Time & Orbit

Eccentricity (e): 0.056

Orbit Range: 0.54 AU - 0.6 AU

Year: 192 Days

Day: 45.9 Hours

Environment

Temp: -3 °C

Axial Tilt: 39.8 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 2 - Terrestrial

Semi-Major Axis: 0.64 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.89

Radius: 0.95

Gravity: 0.99 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 0.61 AU - 0.67 AU

Year: 228 Days

Day: 34.2 Hours

Environment

Temp: -10 °C

Axial Tilt: 24.1 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 3 - Terrestrial

Semi-Major Axis: 1.33 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.26

Radius: 1.39

Gravity: 1.17 G

Time & Orbit

Eccentricity (e): 0.167

Orbit Range: 1.11 AU - 1.55 AU

Year: 684 Days

Day: 35.9 Hours

Environment

Temp: -92 °C

Axial Tilt: 39.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 22,577,095 km

• M1: 823,387 km (0.117 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.6 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 672.8

Radius: 8.6

Gravity: 9.1 G

Time & Orbit

Eccentricity (e): 0.036

Orbit Range: 4.43 AU - 4.77 AU

Year: 4402 Days

Day: 6.6 Hours

Environment

Temp: -163 °C

Axial Tilt: 26.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 22,577,095 km

• M1: 113,844 km (0.074 R)
• M2: 173,234 km (0.099 R)
• M3: 256,860 km (0.087 R)
• M4: 369,208 km (0.078 R)
• M5: 500,554 km (0.06 R)
• M6: 562,189 km (0.096 R)
• M7: 671,096 km (0.047 R)
• M8: 949,647 km (0.097 R)
• M9: 1,028,186 km (0.103 R)
• M10: 1,379,592 km (0.098 R)
• M11: 1,931,159 km (0.059 R)
• M12: 3,196,159 km (0.114 R)
• M13: 3,540,234 km (0.106 R)
• M14: 3,875,034 km (0.12 R)
• M15: 4,003,239 km (0.103 R)
• M16: 4,132,940 km (0.091 R)
• M17: 4,220,156 km (0.108 R)
• M18: 4,329,961 km (0.11 R)
• M19: 4,463,103 km (0.112 R)
• M20: 4,530,272 km (0.106 R)
• M21: 4,710,687 km (0.093 R)
• M22: 5,125,672 km (0.115 R)
• M23: 5,818,609 km (0.052 R)
• M24: 5,892,062 km (0.062 R)
• M25: 6,745,218 km (0.087 R)
• M26: 6,822,261 km (0.116 R)
• M27: 6,899,753 km (0.109 R)
• M28: 7,055,484 km (0.076 R)
• M29: 7,160,053 km (0.109 R)
• M30: 7,238,742 km (0.036 R)
• M31: 7,636,523 km (0.077 R)
• M32: 8,178,067 km (0.113 R)
• M33: 8,288,021 km (0.107 R)
• M34: 8,928,899 km (0.048 R)
• M35: 9,643,528 km (0.084 R)
• M36: 9,846,981 km (0.08 R)
• M37: 9,905,324 km (0.111 R)
• M38: 10,915,409 km (0.087 R)
• M39: 11,310,347 km (0.079 R)
• M40: 11,463,386 km (0.066 R)
• M41: 11,802,674 km (0.074 R)
• M42: 11,895,873 km (0.117 R)
• M43: 12,082,721 km (0.111 R)
• M44: 12,239,350 km (0.086 R)
• M45: 12,744,841 km (0.1 R)
• M46: 12,808,420 km (0.077 R)
• M47: 13,160,573 km (0.101 R)
• M48: 13,710,944 km (0.114 R)
• M49: 14,005,353 km (0.112 R)
• M50: 14,103,938 km (0.039 R)
• M51: 15,644,646 km (0.11 R)
• M52: 15,712,863 km (0.09 R)
• M53: 16,089,700 km (0.119 R)
• M54: 16,957,367 km (0.073 R)
• M55: 17,626,818 km (0.066 R)
• M56: 18,161,481 km (0.117 R)
• M57: 18,918,895 km (0.105 R)
• M58: 19,064,453 km (0.028 R)
• M59: 19,393,120 km (0.086 R)
• M60: 20,241,340 km (0.12 R)
• M61: 20,352,940 km (0.084 R)
• M62: 22,050,577 km (0.12 R)
• M63: 22,742,317 km (0.11 R)
• M64: 23,051,985 km (0.113 R)
• M65: 23,168,521 km (0.114 R)
• M66: 23,441,089 km (0.1 R)
• M67: 23,675,658 km (0.106 R)
• M68: 23,910,976 km (0.06 R)
• M69: 24,107,547 km (0.113 R)
• M70: 24,304,867 km (0.071 R)
• M71: 24,740,645 km (0.115 R)
• M72: 25,139,025 km (0.095 R)
• M73: 25,539,498 km (0.118 R)
• M74: 25,660,074 km (0.044 R)
• M75: 25,861,433 km (0.08 R)
• M76: 26,103,781 km (0.043 R)
• M77: 27,039,666 km (0.099 R)
• M78: 27,367,734 km (0.102 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.42 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 32.8

Radius: 8.4

Gravity: 0.46 G

Time & Orbit

Eccentricity (e): 0.103

Orbit Range: 4.86 AU - 5.98 AU

Year: 5631 Days

Day: 6.5 Hours

Environment

Temp: -176 °C

Axial Tilt: 32.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (30)

Outer Limit: 22,577,095 km

• M1: 108,608 km (0.093 R)
• M2: 322,383 km (0.085 R)
• M3: 504,743 km (0.092 R)
• M4: 681,568 km (0.116 R)
• M5: 801,545 km (0.087 R)
• M6: 900,130 km (0.104 R)
• M7: 1,359,994 km (0.109 R)
• M8: 1,513,631 km (0.105 R)
• M9: 2,773,545 km (0.119 R)
• M10: 3,444,790 km (0.106 R)
• M11: 4,566,774 km (0.092 R)
• M12: 4,759,606 km (0.087 R)
• M13: 5,193,739 km (0.12 R)
• M14: 5,300,851 km (0.102 R)
• M15: 5,654,052 km (0.062 R)
• M16: 5,750,542 km (0.096 R)
• M17: 5,847,482 km (0.083 R)
• M18: 6,541,616 km (0.09 R)
• M19: 6,876,416 km (0.087 R)
• M20: 8,286,525 km (0.12 R)
• M21: 8,411,888 km (0.042 R)
• M22: 8,919,773 km (0.027 R)
• M23: 9,032,271 km (0.066 R)
• M24: 9,145,067 km (0.046 R)
• M25: 9,388,613 km (0.117 R)
• M26: 9,650,708 km (0.077 R)
• M27: 9,948,558 km (0.102 R)
• M28: 10,825,800 km (0.115 R)
• M29: 11,117,964 km (0.12 R)
• M30: 11,273,696 km (0.071 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 581.1

Radius: 8.4

Gravity: 8.24 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 4.71 AU - 7.37 AU

Year: 6624 Days

Day: 5.8 Hours

Environment

Temp: -185 °C

Axial Tilt: 43.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 22,577,095 km

• M1: 149,598 km (0.11 R)
• M2: 359,035 km (0.078 R)
• M3: 824,733 km (0.103 R)
• M4: 926,460 km (0.099 R)
• M5: 1,515,576 km (0.072 R)
• M6: 1,734,288 km (0.085 R)
• M7: 1,809,536 km (0.026 R)
• M8: 1,905,129 km (0.049 R)
• M9: 2,081,505 km (0.118 R)
• M10: 2,181,885 km (0.054 R)
• M11: 2,242,921 km (0.07 R)
• M12: 2,599,413 km (0.082 R)
• M13: 2,686,030 km (0.116 R)
• M14: 2,839,667 km (0.064 R)
• M15: 3,110,140 km (0.088 R)
• M16: 3,773,157 km (0.117 R)
• M17: 3,945,793 km (0.1 R)
• M18: 4,273,114 km (0.046 R)
• M19: 4,401,319 km (0.086 R)
• M20: 4,714,427 km (0.109 R)
• M21: 4,820,343 km (0.096 R)
• M22: 5,362,036 km (0.118 R)
• M23: 5,866,181 km (0.104 R)
• M24: 6,066,343 km (0.107 R)
• M25: 6,297,771 km (0.117 R)
• M26: 7,252,804 km (0.078 R)
• M27: 7,344,657 km (0.069 R)
• M28: 7,841,023 km (0.113 R)
• M29: 8,444,501 km (0.088 R)
• M30: 8,508,828 km (0.056 R)
• M31: 8,703,006 km (0.105 R)
• M32: 8,800,693 km (0.115 R)
• M33: 8,931,442 km (0.034 R)
• M34: 9,628,568 km (0.108 R)
• M35: 9,797,165 km (0.118 R)
• M36: 10,205,716 km (0.117 R)
• M37: 10,377,604 km (0.038 R)
• M38: 10,446,569 km (0.107 R)
• M39: 10,794,085 km (0.11 R)
• M40: 11,180,646 km (0.058 R)
• M41: 11,286,860 km (0.068 R)
• M42: 11,535,941 km (0.1 R)
• M43: 11,750,913 km (0.117 R)
• M44: 12,185,046 km (0.07 R)
• M45: 13,180,620 km (0.082 R)
• M46: 13,820,898 km (0.07 R)
• M47: 14,897,405 km (0.106 R)
• M48: 15,014,241 km (0.061 R)
• M49: 15,131,525 km (0.062 R)
• M50: 15,722,287 km (0.117 R)
• M51: 16,845,319 km (0.062 R)
• M52: 16,967,091 km (0.077 R)
• M53: 17,869,615 km (0.098 R)
• M54: 18,076,958 km (0.1 R)
• M55: 19,507,562 km (0.083 R)
• M56: 21,193,082 km (0.086 R)
• M57: 21,324,578 km (0.103 R)
• M58: 21,500,505 km (0.093 R)
• M59: 21,588,618 km (0.073 R)
• M60: 21,721,012 km (0.11 R)
• M61: 25,210,233 km (0.073 R)
• M62: 25,396,183 km (0.048 R)
• M63: 26,050,674 km (0.1 R)
• M64: 26,285,692 km (0.096 R)
• M65: 26,663,277 km (0.047 R)
• M66: 27,328,389 km (0.065 R)
• M67: 27,423,982 km (0.07 R)
• M68: 27,663,040 km (0.048 R)
• M69: 28,288,060 km (0.091 R)
• M70: 28,529,810 km (0.104 R)
• M71: 29,112,494 km (0.05 R)
• M72: 29,307,569 km (0.087 R)
• M73: 29,650,148 km (0.111 R)
• M74: 29,846,421 km (0.075 R)
• M75: 29,993,924 km (0.119 R)
• M76: 30,635,998 km (0.11 R)
• M77: 30,884,181 km (0.112 R)
• M78: 31,732,850 km (0.104 R)
• M79: 31,984,025 km (0.109 R)
• M80: 32,387,041 km (0.093 R)
• M81: 32,488,170 km (0.118 R)
• M82: 32,690,575 km (0.111 R)
• M83: 32,842,567 km (0.057 R)
• M84: 34,016,312 km (0.079 R)
• M85: 34,221,859 km (0.049 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.85 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 398

Radius: 10.1

Gravity: 3.9 G

Time & Orbit

Eccentricity (e): 0.191

Orbit Range: 5.54 AU - 8.16 AU

Year: 8000 Days

Day: 11.2 Hours

Environment

Temp: -197 °C

Axial Tilt: 31.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 22,577,095 km

• M1: 165,156 km (0.118 R)
• M2: 475,572 km (0.076 R)
• M3: 668,702 km (0.086 R)
• M4: 931,995 km (0.113 R)
• M5: 1,464,862 km (0.116 R)
• M6: 1,589,029 km (0.055 R)
• M7: 1,661,584 km (0.107 R)
• M8: 2,061,159 km (0.116 R)
• M9: 2,201,033 km (0.078 R)
• M10: 3,336,631 km (0.075 R)
• M11: 3,430,578 km (0.117 R)
• M12: 3,501,637 km (0.119 R)
• M13: 3,573,145 km (0.113 R)
• M14: 3,669,486 km (0.094 R)
• M15: 4,418,523 km (0.077 R)
• M16: 4,757,661 km (0.099 R)
• M17: 4,970,539 km (0.065 R)
• M18: 5,132,404 km (0.062 R)
• M19: 5,295,914 km (0.094 R)
• M20: 5,684,270 km (0.109 R)
• M21: 5,882,039 km (0.082 R)
• M22: 6,430,016 km (0.1 R)
• M23: 6,606,392 km (0.086 R)
• M24: 7,267,315 km (0.12 R)
• M25: 7,636,672 km (0.101 R)
• M26: 8,107,008 km (0.08 R)
• M27: 8,813,708 km (0.083 R)
• M28: 9,440,074 km (0.112 R)
• M29: 9,741,813 km (0.075 R)
• M30: 9,910,859 km (0.08 R)
• M31: 10,458,088 km (0.116 R)
• M32: 10,805,305 km (0.044 R)
• M33: 11,333,086 km (0.076 R)
• M34: 11,689,578 km (0.115 R)
• M35: 12,818,144 km (0.066 R)
• M36: 13,115,096 km (0.106 R)
• M37: 13,189,595 km (0.064 R)
• M38: 13,301,794 km (0.086 R)
• M39: 13,489,390 km (0.062 R)
• M40: 13,564,637 km (0.084 R)
• M41: 13,640,035 km (0.055 R)
• M42: 14,440,533 km (0.104 R)
• M43: 14,517,576 km (0.071 R)
• M44: 14,788,198 km (0.116 R)
• M45: 15,847,950 km (0.082 R)
• M46: 15,927,386 km (0.092 R)
• M47: 16,046,915 km (0.094 R)
• M48: 16,891,395 km (0.098 R)
• M49: 17,217,069 km (0.066 R)
• M50: 17,380,580 km (0.089 R)
• M51: 17,462,559 km (0.095 R)
• M52: 17,667,957 km (0.118 R)
• M53: 17,832,964 km (0.103 R)
• M54: 18,330,975 km (0.116 R)
• M55: 18,414,451 km (0.061 R)
• M56: 19,724,030 km (0.101 R)
• M57: 20,584,817 km (0.065 R)
• M58: 20,801,883 km (0.11 R)
• M59: 21,457,720 km (0.117 R)
• M60: 21,677,928 km (0.072 R)
• M61: 21,854,603 km (0.07 R)
• M62: 21,943,016 km (0.049 R)
• M63: 23,149,672 km (0.089 R)
• M64: 24,285,868 km (0.096 R)
• M65: 24,976,412 km (0.086 R)
• M66: 25,626,714 km (0.09 R)
• M67: 27,133,912 km (0.084 R)
• M68: 27,994,250 km (0.105 R)
• M69: 29,497,110 km (0.109 R)
• M70: 30,381,532 km (0.106 R)
• M71: 31,125,333 km (0.064 R)
• M72: 31,374,563 km (0.108 R)
• M73: 31,825,002 km (0.077 R)
• M74: 33,036,296 km (0.108 R)
• M75: 33,392,489 km (0.103 R)
• M76: 33,494,514 km (0.089 R)

Planet 8 - Gas Giant

Semi-Major Axis: 7.37 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 579.6

Radius: 13.3

Gravity: 3.28 G

Time & Orbit

Eccentricity (e): 0.007

Orbit Range: 7.32 AU - 7.42 AU

Year: 8928 Days

Day: 5.2 Hours

Environment

Temp: -191 °C

Axial Tilt: 33 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 22,577,095 km

• M1: 427,850 km (0.061 R)
• M2: 705,504 km (0.039 R)
• M3: 1,060,051 km (0.111 R)
• M4: 1,148,612 km (0.063 R)
• M5: 1,509,293 km (0.096 R)
• M6: 1,841,101 km (0.111 R)
• M7: 1,927,718 km (0.106 R)
• M8: 2,015,831 km (0.049 R)
• M9: 2,196,246 km (0.115 R)
• M10: 2,311,885 km (0.101 R)
• M11: 2,453,405 km (0.095 R)
• M12: 2,745,271 km (0.086 R)
• M13: 2,895,467 km (0.119 R)
• M14: 3,152,177 km (0.107 R)
• M15: 3,283,374 km (0.088 R)
• M16: 3,826,414 km (0.115 R)
• M17: 5,974,490 km (0.088 R)
• M18: 6,072,327 km (0.117 R)
• M19: 6,170,613 km (0.116 R)
• M20: 6,569,441 km (0.108 R)
• M21: 6,839,914 km (0.109 R)
• M22: 7,709,227 km (0.096 R)
• M23: 7,851,495 km (0.113 R)
• M24: 8,030,713 km (0.098 R)
• M25: 8,835,101 km (0.096 R)
• M26: 9,588,775 km (0.118 R)
• M27: 9,703,666 km (0.057 R)
• M28: 9,973,391 km (0.054 R)
• M29: 10,402,288 km (0.116 R)
• M30: 10,956,997 km (0.103 R)
• M31: 11,117,216 km (0.087 R)
• M32: 12,095,287 km (0.04 R)
• M33: 12,260,892 km (0.065 R)
• M34: 12,344,068 km (0.099 R)
• M35: 14,220,175 km (0.12 R)
• M36: 15,415,013 km (0.113 R)
• M37: 16,275,052 km (0.089 R)
• M38: 17,011,372 km (0.116 R)
• M39: 17,805,737 km (0.115 R)
• M40: 18,278,616 km (0.074 R)
• M41: 18,469,054 km (0.111 R)
• M42: 19,092,129 km (0.107 R)
• M43: 19,236,940 km (0.101 R)
• M44: 19,624,847 km (0.103 R)
• M45: 19,868,542 km (0.09 R)
• M46: 20,359,073 km (0.036 R)
• M47: 20,605,910 km (0.106 R)
• M48: 20,803,977 km (0.107 R)
• M49: 22,513,582 km (0.105 R)
• M50: 22,819,958 km (0.101 R)
• M51: 22,922,433 km (0.115 R)
• M52: 23,488,511 km (0.07 R)
• M53: 23,695,555 km (0.096 R)
• M54: 23,799,226 km (0.094 R)
• M55: 24,320,126 km (0.071 R)
• M56: 25,532,617 km (0.094 R)
• M57: 26,065,933 km (0.11 R)
• M58: 26,226,601 km (0.097 R)
• M59: 27,415,156 km (0.116 R)
• M60: 27,633,120 km (0.116 R)
• M61: 28,731,767 km (0.098 R)
• M62: 29,342,126 km (0.101 R)
• M63: 29,453,577 km (0.101 R)
• M64: 30,688,657 km (0.049 R)
• M65: 31,883,345 km (0.037 R)
• M66: 32,169,975 km (0.066 R)
• M67: 32,515,247 km (0.087 R)
• M68: 32,861,566 km (0.056 R)
• M69: 33,499,750 km (0.102 R)
• M70: 33,791,317 km (0.066 R)
• M71: 34,494,277 km (0.07 R)
• M72: 35,320,506 km (0.082 R)
• M73: 35,557,768 km (0.083 R)
• M74: 35,736,089 km (0.094 R)
• M75: 36,812,146 km (0.118 R)
• M76: 36,932,274 km (0.096 R)
• M77: 37,052,700 km (0.113 R)
• M78: 37,354,140 km (0.078 R)
• M79: 37,838,089 km (0.103 R)
• M80: 38,629,162 km (0.079 R)
• M81: 40,165,532 km (0.068 R)
• M82: 40,599,217 km (0.115 R)
• M83: 40,723,532 km (0.106 R)
• M84: 40,847,848 km (0.118 R)

Planet 9 - Gas Giant

Semi-Major Axis: 7.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 83.2

Radius: 9.3

Gravity: 0.96 G

Time & Orbit

Eccentricity (e): 0.189

Orbit Range: 6.13 AU - 8.99 AU

Year: 9275 Days

Day: 5.3 Hours

Environment

Temp: -192 °C

Axial Tilt: 7.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 22,577,095 km

• M1: 126,111 km (0.027 R)
• M2: 374,294 km (0.046 R)
• M3: 836,701 km (0.095 R)
• M4: 1,279,660 km (0.117 R)
• M5: 1,433,596 km (0.047 R)
• M6: 1,676,244 km (0.112 R)
• M7: 1,859,651 km (0.078 R)
• M8: 2,020,170 km (0.081 R)
• M9: 2,094,669 km (0.104 R)
• M10: 2,185,176 km (0.082 R)
• M11: 2,465,074 km (0.092 R)
• M12: 2,740,035 km (0.047 R)
• M13: 2,856,272 km (0.081 R)
• M14: 3,025,019 km (0.092 R)
• M15: 4,412,389 km (0.101 R)
• M16: 4,568,719 km (0.091 R)
• M17: 4,987,593 km (0.069 R)
• M18: 7,538,685 km (0.115 R)
• M19: 8,538,149 km (0.089 R)
• M20: 8,611,153 km (0.076 R)
• M21: 9,578,901 km (0.086 R)
• M22: 10,011,538 km (0.059 R)
• M23: 10,372,668 km (0.071 R)
• M24: 10,450,608 km (0.09 R)
• M25: 11,240,634 km (0.116 R)
• M26: 11,750,913 km (0.119 R)
• M27: 11,832,144 km (0.072 R)
• M28: 12,738,558 km (0.037 R)
• M29: 13,838,252 km (0.051 R)
• M30: 14,038,863 km (0.069 R)
• M31: 14,588,186 km (0.06 R)
• M32: 14,792,387 km (0.098 R)
• M33: 15,085,748 km (0.116 R)
• M34: 15,351,434 km (0.118 R)
• M35: 16,037,341 km (0.112 R)
• M36: 16,187,686 km (0.073 R)
• M37: 16,977,563 km (0.117 R)
• M38: 17,253,870 km (0.079 R)
• M39: 17,377,289 km (0.045 R)
• M40: 17,904,472 km (0.077 R)
• M41: 18,342,644 km (0.098 R)
• M42: 18,752,841 km (0.114 R)
• M43: 19,293,637 km (0.082 R)
• M44: 19,453,558 km (0.096 R)
• M45: 21,507,686 km (0.114 R)
• M46: 22,073,615 km (0.118 R)
• M47: 22,207,505 km (0.114 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 390 - 14,771 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit