🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.48 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.14

Radius: 1.58

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.239

Orbit Range: 1.13 AU - 1.83 AU

Year: 658 Days

Day: 24.6 Hours

Environment

Temp: -41 °C

Axial Tilt: 0.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 2.05 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.18

Radius: 0.5

Gravity: 0.72 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 1.62 AU - 2.48 AU

Year: 1072 Days

Day: 25.1 Hours

Environment

Temp: -71 °C

Axial Tilt: 35.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 4.3 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 3 - Gas Giant

Semi-Major Axis: 6.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 840.2

Radius: 13.4

Gravity: 4.68 G

Time & Orbit

Eccentricity (e): 0.042

Orbit Range: 6.27 AU - 6.81 AU

Year: 6109 Days

Day: 12.3 Hours

Environment

Temp: -153 °C

Axial Tilt: 8.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 87,567,995 km

• M1: 227,538 km (0.059 R)
• M2: 348,264 km (0.061 R)
• M3: 506,090 km (0.089 R)
• M4: 762,052 km (0.1 R)
• M5: 1,014,423 km (0.111 R)
• M6: 1,159,533 km (0.105 R)
• M7: 1,453,792 km (0.091 R)
• M8: 1,638,396 km (0.073 R)
• M9: 1,733,690 km (0.11 R)
• M10: 1,870,422 km (0.078 R)
• M11: 2,454,303 km (0.103 R)
• M12: 2,608,987 km (0.118 R)
• M13: 2,951,566 km (0.081 R)
• M14: 3,604,860 km (0.09 R)
• M15: 3,705,539 km (0.059 R)
• M16: 3,832,697 km (0.106 R)
• M17: 4,170,190 km (0.111 R)
• M18: 4,735,820 km (0.074 R)
• M19: 5,268,687 km (0.095 R)
• M20: 5,527,791 km (0.102 R)
• M21: 5,761,762 km (0.079 R)
• M22: 6,118,852 km (0.114 R)
• M23: 6,239,428 km (0.113 R)
• M24: 7,011,503 km (0.092 R)
• M25: 7,813,796 km (0.099 R)
• M26: 8,142,911 km (0.09 R)
• M27: 8,242,543 km (0.073 R)
• M28: 8,342,624 km (0.031 R)
• M29: 8,543,834 km (0.06 R)
• M30: 8,712,879 km (0.119 R)
• M31: 9,054,262 km (0.091 R)
• M32: 10,247,753 km (0.114 R)
• M33: 10,680,839 km (0.086 R)
• M34: 10,972,854 km (0.102 R)
• M35: 11,378,713 km (0.032 R)
• M36: 11,677,011 km (0.119 R)
• M37: 12,281,387 km (0.051 R)
• M38: 13,012,472 km (0.085 R)
• M39: 13,599,494 km (0.103 R)
• M40: 13,836,756 km (0.107 R)
• M41: 15,166,382 km (0.106 R)
• M42: 15,991,863 km (0.095 R)
• M43: 16,075,338 km (0.071 R)
• M44: 16,200,552 km (0.077 R)
• M45: 16,368,251 km (0.109 R)
• M46: 17,471,685 km (0.107 R)
• M47: 18,119,145 km (0.071 R)
• M48: 18,555,222 km (0.029 R)
• M49: 18,642,887 km (0.085 R)
• M50: 19,749,911 km (0.099 R)
• M51: 20,424,448 km (0.096 R)
• M52: 20,650,939 km (0.046 R)
• M53: 20,832,700 km (0.061 R)
• M54: 21,289,572 km (0.075 R)
• M55: 21,427,352 km (0.086 R)
• M56: 21,703,659 km (0.087 R)
• M57: 22,120,289 km (0.105 R)
• M58: 22,867,680 km (0.083 R)
• M59: 22,961,628 km (0.082 R)
• M60: 23,055,725 km (0.096 R)
• M61: 23,908,732 km (0.114 R)
• M62: 24,099,768 km (0.056 R)
• M63: 24,243,233 km (0.034 R)
• M64: 24,723,890 km (0.047 R)
• M65: 24,965,341 km (0.093 R)
• M66: 25,207,540 km (0.085 R)
• M67: 25,548,025 km (0.118 R)
• M68: 26,135,197 km (0.097 R)
• M69: 26,233,483 km (0.069 R)
• M70: 26,331,918 km (0.032 R)
• M71: 27,522,717 km (0.117 R)
• M72: 27,772,994 km (0.097 R)
• M73: 31,879,157 km (0.074 R)
• M74: 32,881,911 km (0.096 R)
• M75: 33,520,694 km (0.052 R)
• M76: 33,680,913 km (0.067 R)
• M77: 34,055,955 km (0.095 R)
• M78: 35,243,762 km (0.091 R)
• M79: 35,733,546 km (0.109 R)
• M80: 36,170,970 km (0.112 R)

Planet 4 - Gas Giant

Semi-Major Axis: 9.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 60.8

Radius: 13.4

Gravity: 0.34 G

Time & Orbit

Eccentricity (e): 0.075

Orbit Range: 8.91 AU - 10.35 AU

Year: 10915 Days

Day: 7.1 Hours

Environment

Temp: -168 °C

Axial Tilt: 4.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 87,567,995 km

• M1: 167,400 km (0.063 R)
• M2: 314,006 km (0.09 R)
• M3: 480,957 km (0.063 R)
• M4: 804,837 km (0.104 R)
• M5: 943,215 km (0.069 R)
• M6: 1,113,607 km (0.104 R)
• M7: 1,245,701 km (0.099 R)
• M8: 1,647,372 km (0.095 R)
• M9: 1,771,688 km (0.107 R)
• M10: 1,913,656 km (0.092 R)
• M11: 2,239,779 km (0.095 R)
• M12: 2,394,015 km (0.112 R)
• M13: 2,488,411 km (0.111 R)
• M14: 2,616,168 km (0.113 R)
• M15: 2,746,318 km (0.108 R)
• M16: 3,063,914 km (0.092 R)
• M17: 3,218,748 km (0.073 R)
• M18: 3,376,125 km (0.094 R)
• M19: 3,482,489 km (0.076 R)
• M20: 3,716,909 km (0.032 R)
• M21: 3,863,814 km (0.088 R)
• M22: 4,588,017 km (0.099 R)
• M23: 4,706,349 km (0.12 R)
• M24: 5,148,710 km (0.078 R)
• M25: 5,374,902 km (0.083 R)
• M26: 5,541,704 km (0.119 R)
• M27: 5,688,908 km (0.051 R)
• M28: 6,225,515 km (0.05 R)
• M29: 6,356,713 km (0.094 R)
• M30: 6,778,429 km (0.037 R)
• M31: 7,324,162 km (0.096 R)
• M32: 7,602,414 km (0.073 R)
• M33: 7,789,860 km (0.105 R)
• M34: 8,169,390 km (0.033 R)
• M35: 8,361,474 km (0.116 R)
• M36: 8,530,819 km (0.113 R)
• M37: 8,725,745 km (0.05 R)
• M38: 8,823,731 km (0.106 R)
• M39: 8,996,068 km (0.112 R)
• M40: 9,394,447 km (0.078 R)
• M41: 9,620,938 km (0.097 R)
• M42: 9,773,079 km (0.113 R)
• M43: 10,156,798 km (0.076 R)
• M44: 10,467,363 km (0.117 R)
• M45: 11,204,133 km (0.085 R)
• M46: 11,525,170 km (0.083 R)
• M47: 12,313,251 km (0.086 R)
• M48: 12,561,434 km (0.106 R)
• M49: 12,922,862 km (0.101 R)
• M50: 13,203,209 km (0.08 R)
• M51: 13,400,678 km (0.102 R)
• M52: 14,258,023 km (0.105 R)
• M53: 14,839,510 km (0.039 R)
• M54: 15,044,759 km (0.057 R)
• M55: 15,785,867 km (0.075 R)
• M56: 15,935,614 km (0.047 R)
• M57: 16,236,306 km (0.113 R)
• M58: 17,088,415 km (0.117 R)
• M59: 18,142,631 km (0.058 R)
• M60: 18,425,072 km (0.063 R)
• M61: 18,962,876 km (0.119 R)
• M62: 19,345,697 km (0.095 R)
• M63: 20,021,581 km (0.097 R)
• M64: 20,574,345 km (0.064 R)
• M65: 20,901,964 km (0.089 R)
• M66: 21,000,549 km (0.085 R)
• M67: 21,396,535 km (0.115 R)
• M68: 21,761,703 km (0.051 R)
• M69: 22,028,586 km (0.093 R)
• M70: 22,531,982 km (0.096 R)
• M71: 22,666,770 km (0.106 R)

Planet 5 - Gas Giant

Semi-Major Axis: 10.07 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 847.6

Radius: 12.7

Gravity: 5.26 G

Time & Orbit

Eccentricity (e): 0.015

Orbit Range: 9.92 AU - 10.22 AU

Year: 11672 Days

Day: 7.5 Hours

Environment

Temp: -172 °C

Axial Tilt: 13.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 87,567,995 km

• M1: 159,771 km (0.11 R)
• M2: 262,395 km (0.05 R)
• M3: 369,507 km (0.098 R)
• M4: 468,391 km (0.091 R)
• M5: 579,393 km (0.105 R)
• M6: 682,914 km (0.08 R)
• M7: 973,134 km (0.074 R)
• M8: 1,189,004 km (0.106 R)
• M9: 2,038,421 km (0.034 R)
• M10: 2,318,917 km (0.107 R)
• M11: 2,948,424 km (0.074 R)
• M12: 3,201,993 km (0.065 R)
• M13: 3,429,830 km (0.074 R)
• M14: 3,798,739 km (0.096 R)
• M15: 3,936,070 km (0.082 R)
• M16: 4,943,910 km (0.082 R)
• M17: 5,593,464 km (0.034 R)
• M18: 6,597,266 km (0.066 R)
• M19: 8,094,741 km (0.103 R)
• M20: 8,227,883 km (0.09 R)
• M21: 8,676,976 km (0.071 R)
• M22: 9,042,144 km (0.065 R)
• M23: 9,226,598 km (0.081 R)
• M24: 9,319,199 km (0.094 R)
• M25: 12,038,440 km (0.068 R)
• M26: 12,857,638 km (0.115 R)
• M27: 12,961,160 km (0.113 R)
• M28: 13,065,130 km (0.1 R)
• M29: 13,169,400 km (0.111 R)
• M30: 13,431,196 km (0.063 R)
• M31: 13,536,363 km (0.106 R)
• M32: 13,853,660 km (0.069 R)
• M33: 14,173,351 km (0.087 R)
• M34: 15,256,739 km (0.104 R)
• M35: 15,421,596 km (0.104 R)
• M36: 15,808,456 km (0.081 R)
• M37: 16,086,857 km (0.038 R)
• M38: 16,366,755 km (0.093 R)
• M39: 16,648,298 km (0.085 R)
• M40: 16,931,487 km (0.097 R)
• M41: 17,273,468 km (0.101 R)
• M42: 17,906,267 km (0.07 R)
• M43: 18,722,622 km (0.119 R)
• M44: 19,253,844 km (0.11 R)
• M45: 19,909,831 km (0.079 R)
• M46: 20,391,686 km (0.059 R)
• M47: 22,544,100 km (0.055 R)
• M48: 22,794,676 km (0.078 R)
• M49: 23,488,661 km (0.029 R)
• M50: 23,870,135 km (0.101 R)
• M51: 25,156,228 km (0.094 R)
• M52: 26,663,128 km (0.037 R)
• M53: 27,260,771 km (0.116 R)
• M54: 29,421,114 km (0.108 R)
• M55: 30,938,186 km (0.057 R)
• M56: 32,763,579 km (0.103 R)
• M57: 34,191,491 km (0.055 R)
• M58: 34,335,404 km (0.1 R)
• M59: 34,913,001 km (0.115 R)
• M60: 35,712,452 km (0.115 R)
• M61: 36,371,132 km (0.051 R)
• M62: 36,812,446 km (0.12 R)
• M63: 37,181,504 km (0.107 R)
• M64: 38,670,302 km (0.117 R)
• M65: 39,346,634 km (0.035 R)
• M66: 41,245,779 km (0.096 R)
• M67: 44,032,488 km (0.118 R)
• M68: 44,974,954 km (0.106 R)
• M69: 46,480,657 km (0.051 R)
• M70: 46,719,864 km (0.112 R)
• M71: 49,948,934 km (0.113 R)
• M72: 50,193,975 km (0.098 R)
• M73: 50,275,805 km (0.077 R)
• M74: 50,603,425 km (0.116 R)
• M75: 51,672,900 km (0.119 R)
• M76: 53,082,710 km (0.081 R)
• M77: 53,583,265 km (0.064 R)
• M78: 54,589,161 km (0.098 R)
• M79: 55,347,622 km (0.097 R)
• M80: 55,855,357 km (0.083 R)
• M81: 56,364,439 km (0.032 R)
• M82: 56,704,774 km (0.117 R)

Planet 6 - Ice Giant

Semi-Major Axis: 15.74 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 777.4

Radius: 6.3

Gravity: 19.59 G

Time & Orbit

Eccentricity (e): 0.13

Orbit Range: 13.69 AU - 17.79 AU

Year: 22809 Days

Day: 20 Hours

Environment

Temp: -194 °C

Axial Tilt: 31.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 87,567,995 km

• M1: 221,704 km (0.066 R)
• M2: 270,174 km (0.051 R)
• M3: 380,278 km (0.109 R)
• M4: 483,949 km (0.074 R)
• M5: 669,600 km (0.036 R)
• M6: 719,566 km (0.054 R)
• M7: 2,261,321 km (0.106 R)
• M8: 2,533,141 km (0.117 R)
• M9: 2,652,819 km (0.045 R)
• M10: 2,815,432 km (0.115 R)
• M11: 2,981,336 km (0.098 R)
• M12: 3,279,335 km (0.097 R)
• M13: 3,766,725 km (0.107 R)
• M14: 5,056,558 km (0.073 R)
• M15: 5,106,673 km (0.113 R)
• M16: 6,909,926 km (0.111 R)
• M17: 7,878,123 km (0.093 R)
• M18: 8,407,849 km (0.031 R)
• M19: 9,625,725 km (0.062 R)
• M20: 9,687,958 km (0.11 R)
• M21: 10,255,084 km (0.066 R)
• M22: 10,510,447 km (0.048 R)
• M23: 10,962,682 km (0.115 R)
• M24: 11,092,981 km (0.058 R)
• M25: 11,819,129 km (0.072 R)
• M26: 12,289,166 km (0.095 R)
• M27: 12,833,852 km (0.057 R)
• M28: 12,902,517 km (0.108 R)
• M29: 13,805,789 km (0.08 R)
• M30: 14,087,931 km (0.065 R)
• M31: 14,945,426 km (0.118 R)
• M32: 15,893,577 km (0.06 R)
• M33: 16,412,083 km (0.088 R)
• M34: 16,561,232 km (0.064 R)
• M35: 16,860,877 km (0.096 R)
• M36: 17,389,556 km (0.069 R)
• M37: 17,923,770 km (0.056 R)
• M38: 18,386,027 km (0.032 R)
• M39: 19,164,983 km (0.054 R)
• M40: 20,034,296 km (0.043 R)
• M41: 21,321,437 km (0.069 R)
• M42: 21,647,560 km (0.069 R)
• M43: 21,729,240 km (0.082 R)
• M44: 22,057,308 km (0.042 R)
• M45: 22,718,232 km (0.1 R)
• M46: 23,218,338 km (0.082 R)
• M47: 23,890,630 km (0.117 R)
• M48: 24,313,992 km (0.098 R)
• M49: 24,654,627 km (0.083 R)
• M50: 25,945,656 km (0.104 R)
• M51: 26,906,374 km (0.102 R)
• M52: 27,701,038 km (0.092 R)
• M53: 28,413,872 km (0.093 R)
• M54: 28,682,699 km (0.089 R)
• M55: 29,857,491 km (0.1 R)
• M56: 31,232,445 km (0.095 R)
• M57: 32,909,587 km (0.07 R)
• M58: 33,191,878 km (0.095 R)
• M59: 33,475,067 km (0.047 R)
• M60: 33,853,849 km (0.075 R)
• M61: 34,902,829 km (0.089 R)
• M62: 38,706,953 km (0.088 R)
• M63: 39,403,630 km (0.09 R)
• M64: 41,213,765 km (0.096 R)
• M65: 42,435,530 km (0.041 R)
• M66: 44,706,276 km (0.07 R)
• M67: 45,751,367 km (0.035 R)
• M68: 46,698,920 km (0.107 R)
• M69: 49,364,455 km (0.12 R)
• M70: 51,096,350 km (0.116 R)
• M71: 52,079,208 km (0.09 R)
• M72: 52,188,713 km (0.085 R)
• M73: 55,176,631 km (0.117 R)
• M74: 55,400,131 km (0.117 R)
• M75: 55,623,929 km (0.055 R)
• M76: 55,848,027 km (0.118 R)
• M77: 56,072,423 km (0.113 R)
• M78: 62,011,758 km (0.104 R)
• M79: 63,059,841 km (0.097 R)
• M80: 65,409,724 km (0.087 R)
• M81: 67,907,859 km (0.058 R)
• M82: 69,952,862 km (0.106 R)
• M83: 72,140,132 km (0.067 R)
• M84: 75,091,250 km (0.101 R)
• M85: 75,835,200 km (0.029 R)
• M86: 76,581,544 km (0.114 R)
• M87: 76,955,688 km (0.081 R)
• M88: 77,330,281 km (0.1 R)
• M89: 78,835,235 km (0.093 R)
• M90: 79,338,932 km (0.114 R)
• M91: 80,856,752 km (0.103 R)
• M92: 81,237,628 km (0.09 R)
• M93: 83,023,228 km (0.054 R)
• M94: 83,792,460 km (0.094 R)
• M95: 84,177,824 km (0.109 R)
• M96: 84,950,647 km (0.083 R)

Planet 7 - Ice Giant

Semi-Major Axis: 18.58 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 488.1

Radius: 5.6

Gravity: 15.56 G

Time & Orbit

Eccentricity (e): 0.106

Orbit Range: 16.61 AU - 20.55 AU

Year: 29252 Days

Day: 23.2 Hours

Environment

Temp: -195 °C

Axial Tilt: 39 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 87,567,995 km

• M1: 91,703 km (0.117 R)
• M2: 199,264 km (0.099 R)
• M3: 394,938 km (0.102 R)
• M4: 642,523 km (0.078 R)
• M5: 717,771 km (0.081 R)
• M6: 1,355,656 km (0.094 R)
• M7: 1,690,157 km (0.111 R)
• M8: 1,760,019 km (0.118 R)
• M9: 1,939,237 km (0.104 R)
• M10: 2,086,741 km (0.047 R)
• M11: 2,392,818 km (0.103 R)
• M12: 3,661,557 km (0.118 R)
• M13: 4,801,194 km (0.106 R)
• M14: 5,564,891 km (0.105 R)
• M15: 6,202,627 km (0.083 R)
• M16: 6,640,649 km (0.119 R)
• M17: 7,202,090 km (0.066 R)
• M18: 7,895,776 km (0.054 R)
• M19: 7,954,568 km (0.112 R)
• M20: 8,191,082 km (0.069 R)
• M21: 9,470,443 km (0.057 R)
• M22: 10,037,568 km (0.117 R)
• M23: 10,486,212 km (0.111 R)
• M24: 11,871,040 km (0.066 R)
• M25: 12,277,198 km (0.086 R)
• M26: 12,345,265 km (0.084 R)
• M27: 13,242,553 km (0.108 R)
• M28: 13,805,041 km (0.112 R)
• M29: 14,735,540 km (0.061 R)
• M30: 15,098,913 km (0.082 R)
• M31: 15,538,731 km (0.083 R)
• M32: 15,612,483 km (0.092 R)
• M33: 16,356,134 km (0.112 R)
• M34: 18,420,734 km (0.089 R)
• M35: 18,655,154 km (0.102 R)
• M36: 20,082,467 km (0.089 R)
• M37: 20,565,967 km (0.067 R)
• M38: 20,890,445 km (0.089 R)
• M39: 21,298,398 km (0.092 R)
• M40: 21,709,045 km (0.087 R)
• M41: 22,122,234 km (0.077 R)
• M42: 22,705,067 km (0.095 R)
• M43: 23,124,540 km (0.084 R)
• M44: 24,913,880 km (0.098 R)
• M45: 25,000,198 km (0.104 R)
• M46: 25,520,200 km (0.113 R)
• M47: 25,781,547 km (0.092 R)
• M48: 26,218,972 km (0.09 R)
• M49: 29,258,501 km (0.118 R)
• M50: 33,639,624 km (0.037 R)
• M51: 33,830,511 km (0.058 R)
• M52: 35,080,252 km (0.066 R)
• M53: 35,273,832 km (0.071 R)
• M54: 38,319,794 km (0.065 R)
• M55: 39,320,304 km (0.114 R)
• M56: 39,924,680 km (0.062 R)
• M57: 41,858,681 km (0.092 R)
• M58: 41,961,305 km (0.054 R)
• M59: 44,449,417 km (0.093 R)
• M60: 45,711,425 km (0.101 R)
• M61: 47,198,427 km (0.086 R)
• M62: 48,485,717 km (0.106 R)
• M63: 48,809,297 km (0.071 R)
• M64: 51,423,969 km (0.117 R)
• M65: 52,195,146 km (0.088 R)
• M66: 52,305,549 km (0.074 R)
• M67: 53,972,069 km (0.116 R)
• M68: 55,317,702 km (0.084 R)
• M69: 57,356,721 km (0.098 R)
• M70: 57,470,715 km (0.083 R)
• M71: 58,844,622 km (0.116 R)
• M72: 59,305,084 km (0.113 R)
• M73: 61,741,584 km (0.104 R)
• M74: 61,858,420 km (0.061 R)
• M75: 61,975,406 km (0.115 R)
• M76: 62,092,391 km (0.047 R)
• M77: 64,210,697 km (0.063 R)
• M78: 65,159,746 km (0.11 R)
• M79: 67,793,417 km (0.11 R)
• M80: 68,276,019 km (0.099 R)
• M81: 69,974,105 km (0.118 R)
• M82: 70,217,800 km (0.067 R)
• M83: 72,054,562 km (0.068 R)
• M84: 72,177,532 km (0.11 R)
• M85: 73,907,182 km (0.059 R)
• M86: 74,279,532 km (0.091 R)
• M87: 80,321,939 km (0.119 R)
• M88: 81,344,291 km (0.092 R)
• M89: 83,401,860 km (0.108 R)
• M90: 83,918,870 km (0.115 R)
• M91: 85,997,832 km (0.069 R)
• M92: 86,520,078 km (0.105 R)
• M93: 87,568,011 km (0.054 R)

Kuiper Belt

Range: 30 - 51 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 216 - 17,239 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit