🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.34 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.73

Radius: 1.86

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.019

Orbit Range: 1.31 AU - 1.37 AU

Year: 553 Days

Day: 41.2 Hours

Environment

Temp: -9 °C

Axial Tilt: 17.9 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 2 - Terrestrial

Semi-Major Axis: 2.18 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.92

Radius: 1.54

Gravity: 1.23 G

Time & Orbit

Eccentricity (e): 0.231

Orbit Range: 1.68 AU - 2.68 AU

Year: 1147 Days

Day: 32 Hours

Environment

Temp: -64 °C

Axial Tilt: 22.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 3.13 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.69

Radius: 1.86

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.117

Orbit Range: 2.76 AU - 3.5 AU

Year: 1974 Days

Day: 21.6 Hours

Environment

Temp: -100 °C

Axial Tilt: 2.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 109,875,621 km

• M1: 633,248 km (0.088 R)

Planet 4 - Gas Giant

Semi-Major Axis: 5.51 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 536.1

Radius: 10.4

Gravity: 4.96 G

Time & Orbit

Eccentricity (e): 0.092

Orbit Range: 5 AU - 6.02 AU

Year: 4610 Days

Day: 14.6 Hours

Environment

Temp: -142 °C

Axial Tilt: 25.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 109,875,621 km

• M1: 301,141 km (0.107 R)
• M2: 413,937 km (0.053 R)
• M3: 495,767 km (0.071 R)
• M4: 625,618 km (0.038 R)
• M5: 802,443 km (0.083 R)
• M6: 971,339 km (0.095 R)
• M7: 1,192,594 km (0.107 R)
• M8: 1,260,960 km (0.11 R)
• M9: 1,668,615 km (0.073 R)
• M10: 1,761,216 km (0.109 R)
• M11: 1,903,483 km (0.087 R)
• M12: 2,033,334 km (0.117 R)
• M13: 2,250,550 km (0.087 R)
• M14: 2,370,827 km (0.069 R)
• M15: 2,635,765 km (0.052 R)
• M16: 2,873,177 km (0.109 R)
• M17: 3,194,363 km (0.097 R)
• M18: 3,349,496 km (0.109 R)
• M19: 3,546,966 km (0.104 R)
• M20: 3,707,783 km (0.099 R)
• M21: 3,809,510 km (0.032 R)
• M22: 3,974,367 km (0.096 R)
• M23: 4,877,788 km (0.064 R)
• M24: 4,944,808 km (0.059 R)
• M25: 5,238,319 km (0.105 R)
• M26: 6,469,210 km (0.11 R)
• M27: 6,715,897 km (0.067 R)
• M28: 7,041,123 km (0.065 R)
• M29: 7,863,911 km (0.059 R)
• M30: 8,021,587 km (0.108 R)
• M31: 8,100,874 km (0.112 R)
• M32: 8,206,790 km (0.107 R)
• M33: 8,743,996 km (0.093 R)
• M34: 8,825,676 km (0.081 R)
• M35: 8,907,506 km (0.08 R)
• M36: 9,209,694 km (0.079 R)
• M37: 9,880,790 km (0.102 R)
• M38: 10,741,726 km (0.083 R)
• M39: 11,269,806 km (0.104 R)
• M40: 12,381,917 km (0.104 R)
• M41: 12,719,260 km (0.039 R)
• M42: 12,873,645 km (0.09 R)
• M43: 13,184,210 km (0.101 R)
• M44: 14,098,851 km (0.1 R)
• M45: 14,322,650 km (0.084 R)
• M46: 14,838,762 km (0.095 R)
• M47: 15,066,450 km (0.118 R)
• M48: 15,197,049 km (0.119 R)
• M49: 15,558,328 km (0.108 R)
• M50: 15,756,545 km (0.08 R)
• M51: 15,922,300 km (0.111 R)
• M52: 16,122,163 km (0.103 R)
• M53: 16,289,263 km (0.071 R)
• M54: 16,490,622 km (0.089 R)
• M55: 16,726,388 km (0.094 R)
• M56: 16,929,542 km (0.102 R)
• M57: 17,201,661 km (0.115 R)
• M58: 17,269,877 km (0.037 R)
• M59: 17,406,610 km (0.078 R)
• M60: 17,715,679 km (0.113 R)
• M61: 17,888,165 km (0.103 R)
• M62: 18,304,347 km (0.084 R)
• M63: 19,287,953 km (0.045 R)
• M64: 19,394,317 km (0.082 R)
• M65: 19,786,114 km (0.102 R)
• M66: 20,000,936 km (0.102 R)
• M67: 20,396,772 km (0.038 R)
• M68: 20,541,433 km (0.119 R)
• M69: 21,710,391 km (0.083 R)
• M70: 21,821,093 km (0.071 R)
• M71: 22,005,996 km (0.073 R)
• M72: 23,466,221 km (0.092 R)
• M73: 23,542,067 km (0.095 R)
• M74: 23,617,764 km (0.069 R)
• M75: 24,036,189 km (0.093 R)
• M76: 24,418,711 km (0.037 R)
• M77: 24,495,455 km (0.097 R)
• M78: 25,073,650 km (0.072 R)
• M79: 25,539,348 km (0.099 R)
• M80: 25,617,289 km (0.113 R)
• M81: 25,695,229 km (0.059 R)
• M82: 26,164,817 km (0.116 R)

Planet 5 - Gas Giant

Semi-Major Axis: 10.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 345.1

Radius: 8.6

Gravity: 4.67 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 8.83 AU - 11.19 AU

Year: 11289 Days

Day: 6.9 Hours

Environment

Temp: -179 °C

Axial Tilt: 3.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 109,875,621 km

• M1: 182,659 km (0.066 R)
• M2: 354,248 km (0.099 R)
• M3: 424,559 km (0.113 R)
• M4: 653,443 km (0.052 R)
• M5: 728,392 km (0.093 R)
• M6: 822,190 km (0.116 R)
• M7: 1,075,459 km (0.104 R)
• M8: 1,450,501 km (0.106 R)
• M9: 2,062,506 km (0.038 R)
• M10: 2,198,341 km (0.043 R)
• M11: 2,479,136 km (0.098 R)
• M12: 3,795,896 km (0.091 R)
• M13: 3,851,397 km (0.061 R)
• M14: 3,963,147 km (0.096 R)
• M15: 4,132,791 km (0.067 R)
• M16: 4,538,201 km (0.099 R)
• M17: 5,169,953 km (0.11 R)
• M18: 5,355,454 km (0.097 R)
• M19: 5,574,765 km (0.12 R)
• M20: 5,669,759 km (0.077 R)
• M21: 5,765,203 km (0.104 R)
• M22: 6,022,361 km (0.104 R)
• M23: 6,087,287 km (0.086 R)
• M24: 6,448,267 km (0.071 R)
• M25: 7,398,512 km (0.102 R)
• M26: 8,392,141 km (0.042 R)
• M27: 8,501,049 km (0.103 R)
• M28: 8,830,613 km (0.109 R)
• M29: 9,239,314 km (0.077 R)
• M30: 9,921,181 km (0.028 R)
• M31: 10,074,968 km (0.047 R)
• M32: 10,345,890 km (0.082 R)
• M33: 11,373,178 km (0.086 R)
• M34: 12,021,535 km (0.046 R)
• M35: 12,350,202 km (0.118 R)
• M36: 12,974,474 km (0.101 R)
• M37: 13,226,995 km (0.104 R)
• M38: 14,514,135 km (0.103 R)
• M39: 14,864,194 km (0.104 R)
• M40: 15,349,938 km (0.053 R)
• M41: 15,796,039 km (0.089 R)
• M42: 16,155,972 km (0.116 R)
• M43: 16,700,957 km (0.038 R)
• M44: 16,838,288 km (0.086 R)
• M45: 17,067,771 km (0.11 R)
• M46: 17,437,128 km (0.12 R)
• M47: 17,529,878 km (0.063 R)
• M48: 17,949,351 km (0.116 R)
• M49: 18,230,745 km (0.092 R)
• M50: 19,419,300 km (0.092 R)
• M51: 20,878,178 km (0.1 R)
• M52: 21,124,865 km (0.042 R)
• M53: 21,421,966 km (0.06 R)
• M54: 22,827,139 km (0.075 R)
• M55: 22,928,716 km (0.093 R)
• M56: 23,030,293 km (0.077 R)
• M57: 23,438,396 km (0.099 R)
• M58: 23,694,657 km (0.076 R)
• M59: 23,951,965 km (0.116 R)
• M60: 25,042,384 km (0.112 R)
• M61: 25,462,006 km (0.057 R)
• M62: 27,595,122 km (0.091 R)
• M63: 27,919,899 km (0.078 R)
• M64: 28,300,626 km (0.087 R)
• M65: 29,067,016 km (0.085 R)
• M66: 29,895,638 km (0.072 R)
• M67: 30,006,790 km (0.11 R)
• M68: 32,371,034 km (0.094 R)
• M69: 33,864,470 km (0.098 R)
• M70: 33,980,259 km (0.107 R)
• M71: 34,328,523 km (0.113 R)
• M72: 34,386,567 km (0.074 R)
• M73: 34,853,013 km (0.085 R)
• M74: 34,911,505 km (0.1 R)
• M75: 36,087,195 km (0.066 R)
• M76: 36,442,490 km (0.091 R)
• M77: 36,858,372 km (0.086 R)
• M78: 36,977,602 km (0.114 R)
• M79: 37,096,831 km (0.099 R)
• M80: 37,935,178 km (0.059 R)
• M81: 38,296,457 km (0.084 R)
• M82: 38,658,783 km (0.054 R)
• M83: 38,900,982 km (0.096 R)
• M84: 39,813,828 km (0.059 R)
• M85: 40,242,126 km (0.06 R)
• M86: 40,364,797 km (0.113 R)
• M87: 40,733,555 km (0.077 R)
• M88: 41,041,727 km (0.065 R)

Planet 6 - Gas Giant

Semi-Major Axis: 12.7 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 16.6

Radius: 13.5

Gravity: 0.09 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 11.71 AU - 13.69 AU

Year: 16132 Days

Day: 8.2 Hours

Environment

Temp: -180 °C

Axial Tilt: 103.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 109,875,621 km

• M1: 178,919 km (0.077 R)
• M2: 379,380 km (0.068 R)
• M3: 653,144 km (0.065 R)
• M4: 839,094 km (0.111 R)
• M5: 963,859 km (0.103 R)
• M6: 1,095,505 km (0.101 R)
• M7: 1,233,734 km (0.075 R)
• M8: 1,552,377 km (0.073 R)
• M9: 1,758,972 km (0.078 R)
• M10: 1,846,786 km (0.046 R)
• M11: 1,961,976 km (0.094 R)
• M12: 2,308,594 km (0.105 R)
• M13: 2,718,642 km (0.063 R)
• M14: 3,106,101 km (0.104 R)
• M15: 3,198,103 km (0.1 R)
• M16: 3,671,880 km (0.109 R)
• M17: 3,802,030 km (0.055 R)
• M18: 3,966,887 km (0.11 R)
• M19: 4,185,000 km (0.104 R)
• M20: 4,458,765 km (0.119 R)
• M21: 4,988,191 km (0.109 R)
• M22: 5,500,415 km (0.038 R)
• M23: 6,029,692 km (0.086 R)
• M24: 6,575,425 km (0.115 R)
• M25: 6,995,196 km (0.109 R)
• M26: 8,114,488 km (0.064 R)
• M27: 8,242,244 km (0.032 R)
• M28: 8,716,769 km (0.1 R)
• M29: 9,001,304 km (0.093 R)
• M30: 9,400,431 km (0.095 R)
• M31: 9,714,886 km (0.069 R)
• M32: 9,896,198 km (0.087 R)
• M33: 10,216,188 km (0.047 R)
• M34: 10,400,493 km (0.028 R)
• M35: 10,562,806 km (0.075 R)
• M36: 10,772,543 km (0.117 R)
• M37: 11,125,444 km (0.084 R)
• M38: 12,846,717 km (0.029 R)
• M39: 13,371,656 km (0.096 R)
• M40: 13,674,741 km (0.116 R)
• M41: 14,082,545 km (0.064 R)
• M42: 14,545,999 km (0.09 R)
• M43: 14,701,581 km (0.043 R)
• M44: 15,250,755 km (0.043 R)
• M45: 15,913,174 km (0.048 R)
• M46: 16,073,543 km (0.064 R)
• M47: 16,612,096 km (0.047 R)
• M48: 16,856,389 km (0.115 R)
• M49: 17,129,255 km (0.102 R)
• M50: 18,740,424 km (0.073 R)

Planet 7 - Ice Giant

Semi-Major Axis: 17.67 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 229.3

Radius: 3.9

Gravity: 15.08 G

Time & Orbit

Eccentricity (e): 0.117

Orbit Range: 15.6 AU - 19.74 AU

Year: 26476 Days

Day: 21.6 Hours

Environment

Temp: -187 °C

Axial Tilt: 36.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 109,875,621 km

• M1: 78,090 km (0.089 R)
• M2: 121,922 km (0.067 R)
• M3: 501,452 km (0.086 R)
• M4: 616,044 km (0.09 R)
• M5: 676,482 km (0.051 R)
• M6: 803,191 km (0.037 R)
• M7: 891,903 km (0.075 R)
• M8: 1,303,895 km (0.109 R)
• M9: 1,488,648 km (0.072 R)
• M10: 1,738,327 km (0.115 R)
• M11: 1,941,631 km (0.061 R)
• M12: 2,091,378 km (0.057 R)
• M13: 2,121,896 km (0.093 R)
• M14: 3,635,677 km (0.03 R)
• M15: 4,747,937 km (0.112 R)
• M16: 4,990,286 km (0.104 R)
• M17: 5,783,902 km (0.113 R)
• M18: 6,349,233 km (0.092 R)
• M19: 7,531,804 km (0.113 R)
• M20: 8,244,189 km (0.11 R)
• M21: 10,142,736 km (0.081 R)
• M22: 12,113,987 km (0.084 R)
• M23: 12,278,844 km (0.064 R)
• M24: 12,499,949 km (0.093 R)
• M25: 13,058,249 km (0.083 R)
• M26: 13,567,629 km (0.086 R)
• M27: 14,489,152 km (0.076 R)
• M28: 15,609,491 km (0.077 R)
• M29: 15,848,997 km (0.085 R)
• M30: 16,818,690 km (0.081 R)
• M31: 16,941,211 km (0.098 R)
• M32: 17,002,546 km (0.076 R)
• M33: 17,372,502 km (0.095 R)
• M34: 17,434,435 km (0.088 R)
• M35: 18,120,192 km (0.086 R)
• M36: 18,371,815 km (0.096 R)
• M37: 19,711,464 km (0.071 R)
• M38: 19,905,343 km (0.118 R)
• M39: 20,035,044 km (0.106 R)
• M40: 20,164,895 km (0.11 R)
• M41: 21,082,230 km (0.096 R)
• M42: 21,413,140 km (0.08 R)
• M43: 21,545,983 km (0.086 R)
• M44: 22,550,981 km (0.056 R)
• M45: 22,889,222 km (0.088 R)
• M46: 22,957,140 km (0.063 R)
• M47: 23,025,057 km (0.092 R)
• M48: 23,434,207 km (0.106 R)
• M49: 23,639,605 km (0.069 R)
• M50: 23,983,381 km (0.089 R)
• M51: 24,467,330 km (0.099 R)
• M52: 25,234,318 km (0.079 R)
• M53: 25,304,480 km (0.106 R)
• M54: 25,726,645 km (0.115 R)
• M55: 26,935,097 km (0.109 R)
• M56: 28,234,803 km (0.092 R)
• M57: 28,307,657 km (0.05 R)
• M58: 28,453,365 km (0.081 R)
• M59: 30,520,509 km (0.101 R)
• M60: 31,195,195 km (0.082 R)
• M61: 31,496,635 km (0.12 R)
• M62: 32,178,352 km (0.069 R)
• M63: 32,559,079 km (0.031 R)
• M64: 33,633,341 km (0.111 R)
• M65: 33,865,068 km (0.117 R)
• M66: 34,174,886 km (0.116 R)
• M67: 34,875,303 km (0.082 R)
• M68: 35,423,280 km (0.085 R)
• M69: 35,895,261 km (0.102 R)
• M70: 38,770,831 km (0.118 R)
• M71: 39,013,778 km (0.096 R)
• M72: 39,501,168 km (0.112 R)
• M73: 40,728,469 km (0.067 R)
• M74: 42,134,390 km (0.108 R)
• M75: 43,808,839 km (0.103 R)
• M76: 44,569,394 km (0.037 R)
• M77: 46,189,240 km (0.115 R)
• M78: 46,446,698 km (0.062 R)
• M79: 47,395,149 km (0.107 R)
• M80: 47,915,001 km (0.081 R)
• M81: 48,785,960 km (0.106 R)
• M82: 48,873,325 km (0.06 R)
• M83: 51,518,515 km (0.064 R)
• M84: 52,410,417 km (0.059 R)
• M85: 53,577,729 km (0.072 R)
• M86: 55,754,977 km (0.079 R)
• M87: 56,762,518 km (0.075 R)
• M88: 57,130,380 km (0.086 R)
• M89: 57,868,496 km (0.036 R)
• M90: 58,146,149 km (0.101 R)
• M91: 58,331,501 km (0.112 R)
• M92: 61,134,666 km (0.036 R)
• M93: 61,511,802 km (0.049 R)
• M94: 62,647,699 km (0.025 R)
• M95: 62,742,693 km (0.037 R)
• M96: 62,932,683 km (0.085 R)

Asteroid Belt

Center: 18.42 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 8 - Ice Giant

Semi-Major Axis: 19.17 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 921.8

Radius: 4.3

Gravity: 49.85 G

Time & Orbit

Eccentricity (e): 0.166

Orbit Range: 15.99 AU - 22.35 AU

Year: 29918 Days

Day: 18.3 Hours

Environment

Temp: -201 °C

Axial Tilt: 9.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 109,875,621 km

• M1: 624,122 km (0.108 R)
• M2: 866,920 km (0.1 R)
• M3: 899,382 km (0.04 R)
• M4: 1,032,674 km (0.08 R)
• M5: 1,318,406 km (0.088 R)
• M6: 1,587,533 km (0.094 R)
• M7: 1,627,326 km (0.112 R)
• M8: 2,823,211 km (0.102 R)
• M9: 2,871,681 km (0.085 R)
• M10: 3,683,848 km (0.083 R)
• M11: 4,169,891 km (0.108 R)
• M12: 4,504,990 km (0.102 R)
• M13: 4,791,021 km (0.109 R)
• M14: 6,497,484 km (0.101 R)
• M15: 6,690,466 km (0.108 R)
• M16: 7,347,350 km (0.104 R)
• M17: 7,414,070 km (0.118 R)
• M18: 9,583,090 km (0.117 R)
• M19: 10,396,454 km (0.112 R)
• M20: 10,622,047 km (0.114 R)
• M21: 11,618,519 km (0.113 R)
• M22: 12,724,496 km (0.098 R)
• M23: 13,698,976 km (0.059 R)
• M24: 13,946,261 km (0.088 R)
• M25: 16,412,233 km (0.032 R)
• M26: 17,027,230 km (0.107 R)
• M27: 17,115,792 km (0.117 R)
• M28: 18,008,891 km (0.093 R)
• M29: 18,461,275 km (0.093 R)
• M30: 19,008,803 km (0.102 R)
• M31: 20,120,016 km (0.036 R)
• M32: 21,442,910 km (0.112 R)
• M33: 21,538,503 km (0.049 R)
• M34: 21,826,030 km (0.03 R)
• M35: 22,793,629 km (0.113 R)
• M36: 22,988,705 km (0.118 R)
• M37: 25,880,731 km (0.088 R)
• M38: 26,390,710 km (0.094 R)
• M39: 31,453,102 km (0.078 R)
• M40: 33,981,904 km (0.114 R)
• M41: 34,652,252 km (0.044 R)
• M42: 34,764,451 km (0.099 R)
• M43: 34,989,147 km (0.099 R)
• M44: 35,892,568 km (0.092 R)
• M45: 36,918,211 km (0.049 R)
• M46: 38,184,707 km (0.059 R)
• M47: 38,648,759 km (0.119 R)
• M48: 41,591,200 km (0.111 R)
• M49: 42,788,133 km (0.101 R)
• M50: 42,908,559 km (0.086 R)
• M51: 43,390,862 km (0.032 R)
• M52: 43,511,737 km (0.034 R)
• M53: 43,632,762 km (0.049 R)
• M54: 47,563,297 km (0.106 R)
• M55: 49,697,011 km (0.117 R)
• M56: 51,349,619 km (0.089 R)
• M57: 51,733,487 km (0.115 R)
• M58: 53,020,178 km (0.103 R)
• M59: 56,019,017 km (0.08 R)
• M60: 59,206,499 km (0.111 R)
• M61: 60,147,170 km (0.085 R)
• M62: 64,096,704 km (0.031 R)
• M63: 64,510,043 km (0.11 R)
• M64: 66,033,099 km (0.102 R)
• M65: 66,589,902 km (0.101 R)
• M66: 67,008,477 km (0.093 R)
• M67: 67,708,146 km (0.11 R)
• M68: 70,530,759 km (0.065 R)
• M69: 74,112,730 km (0.051 R)
• M70: 75,853,002 km (0.077 R)
• M71: 76,874,307 km (0.107 R)
• M72: 78,047,154 km (0.097 R)
• M73: 83,247,325 km (0.106 R)
• M74: 84,602,533 km (0.101 R)
• M75: 87,182,198 km (0.117 R)
• M76: 87,640,117 km (0.084 R)
• M77: 89,479,722 km (0.084 R)
• M78: 90,095,617 km (0.114 R)
• M79: 91,486,877 km (0.088 R)
• M80: 92,418,273 km (0.098 R)
• M81: 93,196,781 km (0.092 R)
• M82: 95,545,617 km (0.116 R)
• M83: 96,648,303 km (0.04 R)
• M84: 98,548,495 km (0.031 R)
• M85: 100,301,184 km (0.079 R)
• M86: 101,582,340 km (0.103 R)
• M87: 103,191,265 km (0.101 R)
• M88: 103,352,681 km (0.104 R)
• M89: 103,514,097 km (0.061 R)
• M90: 103,998,944 km (0.099 R)
• M91: 104,970,881 km (0.044 R)
• M92: 106,760,670 km (0.082 R)
• M93: 108,724,441 km (0.114 R)

Kuiper Belt

Range: 30.8 - 50.8 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 494 - 15,283 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit