🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.53 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.02

Radius: 1.74

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 0.42 AU - 0.64 AU

Year: 172 Days

Day: 35.3 Hours

Environment

Temp: 18 °C

Axial Tilt: 29.2 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 2 - Terrestrial

Semi-Major Axis: 0.59 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.99

Radius: 1.9

Gravity: 1.38 G

Time & Orbit

Eccentricity (e): 0.091

Orbit Range: 0.54 AU - 0.64 AU

Year: 202 Days

Day: 30.2 Hours

Environment

Temp: 18 °C

Axial Tilt: 160 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (2)

Outer Limit: 81,239,850 km

• M1: 51,162 km (0.104 R)
• M2: 568,023 km (0.119 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.66 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.91

Radius: 1.3

Gravity: 1.13 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 1.56 AU - 1.76 AU

Year: 954 Days

Day: 33.3 Hours

Environment

Temp: -108 °C

Axial Tilt: 23.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 81,239,850 km

• M1: 252,372 km (0.079 R)

Planet 4 - Terrestrial

Semi-Major Axis: 1.85 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.02

Radius: 1.01

Gravity: 1 G

Time & Orbit

Eccentricity (e): 0.2

Orbit Range: 1.48 AU - 2.22 AU

Year: 1123 Days

Day: 14.4 Hours

Environment

Temp: -123 °C

Axial Tilt: 32.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 2.36 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.25

Radius: 1.09

Gravity: 1.05 G

Time & Orbit

Eccentricity (e): 0.195

Orbit Range: 1.9 AU - 2.82 AU

Year: 1618 Days

Day: 17.4 Hours

Environment

Temp: -140 °C

Axial Tilt: 16.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 2.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 105.7

Radius: 15

Gravity: 0.47 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 2.76 AU - 2.96 AU

Year: 2158 Days

Day: 9.3 Hours

Environment

Temp: -144 °C

Axial Tilt: 20.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 81,239,850 km

• M1: 188,793 km (0.107 R)
• M2: 326,423 km (0.093 R)
• M3: 447,746 km (0.108 R)
• M4: 606,470 km (0.096 R)
• M5: 766,689 km (0.1 R)
• M6: 890,257 km (0.113 R)
• M7: 1,003,353 km (0.097 R)
• M8: 1,102,836 km (0.091 R)
• M9: 1,305,989 km (0.047 R)
• M10: 1,416,093 km (0.052 R)
• M11: 1,609,374 km (0.1 R)
• M12: 1,758,523 km (0.077 R)
• M13: 2,055,325 km (0.078 R)
• M14: 2,334,924 km (0.089 R)
• M15: 2,644,890 km (0.068 R)
• M16: 2,769,057 km (0.065 R)
• M17: 2,913,568 km (0.1 R)
• M18: 3,200,796 km (0.088 R)
• M19: 3,536,344 km (0.085 R)
• M20: 3,863,515 km (0.105 R)
• M21: 4,107,658 km (0.085 R)
• M22: 4,221,353 km (0.109 R)
• M23: 4,399,075 km (0.041 R)
• M24: 4,762,149 km (0.098 R)
• M25: 4,903,669 km (0.114 R)
• M26: 5,235,477 km (0.032 R)
• M27: 5,654,949 km (0.072 R)
• M28: 6,109,128 km (0.1 R)
• M29: 7,003,275 km (0.119 R)
• M30: 7,139,708 km (0.105 R)
• M31: 8,145,754 km (0.065 R)
• M32: 8,993,375 km (0.075 R)
• M33: 9,182,616 km (0.108 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 465.2

Radius: 12

Gravity: 3.23 G

Time & Orbit

Eccentricity (e): 0.148

Orbit Range: 4.74 AU - 6.38 AU

Year: 5850 Days

Day: 10.7 Hours

Environment

Temp: -187 °C

Axial Tilt: 49.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 81,239,850 km

• M1: 220,058 km (0.033 R)
• M2: 349,461 km (0.1 R)
• M3: 457,620 km (0.08 R)
• M4: 548,276 km (0.105 R)
• M5: 715,676 km (0.084 R)
• M6: 850,314 km (0.052 R)
• M7: 1,701,676 km (0.099 R)
• M8: 1,818,661 km (0.064 R)
• M9: 1,921,285 km (0.104 R)
• M10: 2,008,202 km (0.086 R)
• M11: 2,295,879 km (0.051 R)
• M12: 2,444,728 km (0.064 R)
• M13: 2,558,423 km (0.076 R)
• M14: 2,732,555 km (0.057 R)
• M15: 2,950,818 km (0.116 R)
• M16: 3,092,786 km (0.102 R)
• M17: 3,341,418 km (0.085 R)
• M18: 3,726,782 km (0.047 R)
• M19: 3,814,447 km (0.117 R)
• M20: 3,991,720 km (0.052 R)
• M21: 4,586,970 km (0.104 R)
• M22: 4,991,333 km (0.05 R)
• M23: 5,112,507 km (0.077 R)
• M24: 5,733,039 km (0.107 R)
• M25: 6,272,788 km (0.113 R)
• M26: 6,482,674 km (0.117 R)
• M27: 6,748,360 km (0.108 R)
• M28: 6,828,844 km (0.101 R)
• M29: 6,990,708 km (0.119 R)
• M30: 7,126,543 km (0.117 R)
• M31: 7,235,750 km (0.083 R)
• M32: 7,345,704 km (0.103 R)
• M33: 7,594,934 km (0.096 R)
• M34: 7,931,679 km (0.107 R)
• M35: 8,301,934 km (0.081 R)
• M36: 8,532,763 km (0.094 R)
• M37: 8,707,194 km (0.068 R)
• M38: 9,267,438 km (0.104 R)
• M39: 9,476,726 km (0.115 R)
• M40: 10,083,644 km (0.091 R)
• M41: 10,299,065 km (0.1 R)
• M42: 10,547,099 km (0.076 R)
• M43: 10,828,492 km (0.055 R)
• M44: 11,303,166 km (0.079 R)
• M45: 11,881,661 km (0.078 R)
• M46: 12,109,200 km (0.093 R)
• M47: 12,207,186 km (0.114 R)
• M48: 12,535,853 km (0.062 R)
• M49: 12,634,887 km (0.115 R)
• M50: 12,933,933 km (0.033 R)
• M51: 13,538,906 km (0.082 R)
• M52: 13,810,726 km (0.062 R)
• M53: 14,811,386 km (0.097 R)
• M54: 15,056,427 km (0.058 R)
• M55: 15,408,880 km (0.102 R)
• M56: 16,554,800 km (0.113 R)
• M57: 16,663,707 km (0.066 R)
• M58: 17,728,245 km (0.101 R)
• M59: 17,988,396 km (0.11 R)
• M60: 18,175,094 km (0.1 R)
• M61: 18,362,391 km (0.107 R)
• M62: 21,485,097 km (0.057 R)
• M63: 22,682,927 km (0.081 R)
• M64: 22,924,976 km (0.111 R)
• M65: 23,902,149 km (0.091 R)
• M66: 23,984,279 km (0.06 R)
• M67: 24,976,113 km (0.104 R)
• M68: 25,351,603 km (0.093 R)
• M69: 25,435,228 km (0.066 R)
• M70: 26,150,306 km (0.119 R)
• M71: 26,573,967 km (0.065 R)
• M72: 26,701,574 km (0.061 R)
• M73: 27,085,442 km (0.089 R)
• M74: 27,385,237 km (0.115 R)
• M75: 27,729,312 km (0.082 R)
• M76: 27,815,480 km (0.078 R)
• M77: 29,119,674 km (0.104 R)

Planet 8 - Gas Giant

Semi-Major Axis: 9.22 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 701.7

Radius: 15

Gravity: 3.12 G

Time & Orbit

Eccentricity (e): 0.247

Orbit Range: 6.94 AU - 11.5 AU

Year: 12492 Days

Day: 12.7 Hours

Environment

Temp: -202 °C

Axial Tilt: 13.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (87)

Outer Limit: 81,239,850 km

• M1: 219,310 km (0.098 R)
• M2: 321,486 km (0.076 R)
• M3: 600,336 km (0.065 R)
• M4: 702,063 km (0.071 R)
• M5: 829,969 km (0.027 R)
• M6: 1,822,252 km (0.102 R)
• M7: 2,141,643 km (0.079 R)
• M8: 2,596,271 km (0.045 R)
• M9: 2,804,810 km (0.043 R)
• M10: 3,270,808 km (0.069 R)
• M11: 3,862,617 km (0.077 R)
• M12: 4,381,572 km (0.079 R)
• M13: 5,108,169 km (0.082 R)
• M14: 5,333,463 km (0.095 R)
• M15: 7,002,228 km (0.078 R)
• M16: 7,763,830 km (0.064 R)
• M17: 7,936,616 km (0.104 R)
• M18: 8,154,580 km (0.096 R)
• M19: 8,551,762 km (0.098 R)
• M20: 8,685,652 km (0.072 R)
• M21: 8,910,348 km (0.05 R)
• M22: 10,393,312 km (0.112 R)
• M23: 10,631,921 km (0.101 R)
• M24: 10,872,474 km (0.113 R)
• M25: 11,604,756 km (0.097 R)
• M26: 11,703,640 km (0.114 R)
• M27: 13,634,948 km (0.085 R)
• M28: 13,739,368 km (0.107 R)
• M29: 13,844,086 km (0.104 R)
• M30: 14,318,311 km (0.107 R)
• M31: 14,530,740 km (0.105 R)
• M32: 14,797,922 km (0.099 R)
• M33: 15,174,610 km (0.077 R)
• M34: 16,102,715 km (0.095 R)
• M35: 17,049,071 km (0.099 R)
• M36: 17,671,248 km (0.089 R)
• M37: 19,229,460 km (0.117 R)
• M38: 19,405,387 km (0.102 R)
• M39: 19,522,971 km (0.097 R)
• M40: 20,173,722 km (0.078 R)
• M41: 20,711,526 km (0.071 R)
• M42: 21,923,418 km (0.119 R)
• M43: 22,168,460 km (0.086 R)
• M44: 22,414,548 km (0.114 R)
• M45: 22,599,750 km (0.118 R)
• M46: 23,033,734 km (0.118 R)
• M47: 23,220,581 km (0.064 R)
• M48: 23,595,773 km (0.112 R)
• M49: 24,733,465 km (0.114 R)
• M50: 25,501,799 km (0.111 R)
• M51: 26,148,212 km (0.097 R)
• M52: 26,734,486 km (0.12 R)
• M53: 27,193,602 km (0.063 R)
• M54: 28,252,605 km (0.062 R)
• M55: 28,787,118 km (0.089 R)
• M56: 29,325,072 km (0.085 R)
• M57: 31,925,382 km (0.1 R)
• M58: 33,182,752 km (0.088 R)
• M59: 34,884,428 km (0.063 R)
• M60: 35,242,416 km (0.029 R)
• M61: 35,745,813 km (0.116 R)
• M62: 38,077,146 km (0.053 R)
• M63: 38,593,707 km (0.061 R)
• M64: 38,815,711 km (0.091 R)
• M65: 39,559,063 km (0.079 R)
• M66: 39,857,660 km (0.067 R)
• M67: 40,157,155 km (0.059 R)
• M68: 41,135,375 km (0.062 R)
• M69: 42,502,700 km (0.118 R)
• M70: 43,345,684 km (0.097 R)
• M71: 44,116,861 km (0.035 R)
• M72: 44,814,885 km (0.064 R)
• M73: 46,143,014 km (0.098 R)
• M74: 46,536,158 km (0.115 R)
• M75: 48,199,387 km (0.108 R)
• M76: 49,158,608 km (0.068 R)
• M77: 49,399,461 km (0.102 R)
• M78: 50,285,679 km (0.091 R)
• M79: 50,852,355 km (0.118 R)
• M80: 51,095,901 km (0.085 R)
• M81: 51,339,745 km (0.041 R)
• M82: 51,665,569 km (0.112 R)
• M83: 52,319,312 km (0.1 R)
• M84: 52,483,122 km (0.105 R)
• M85: 53,882,759 km (0.103 R)
• M86: 54,379,724 km (0.105 R)
• M87: 54,878,184 km (0.112 R)

Planet 9 - Ice Giant

Semi-Major Axis: 11.61 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 528.8

Radius: 3.1

Gravity: 55.03 G

Time & Orbit

Eccentricity (e): 0.13

Orbit Range: 10.1 AU - 13.12 AU

Year: 17652 Days

Day: 23.6 Hours

Environment

Temp: -209 °C

Axial Tilt: 12.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 81,239,850 km

• M1: 40,541 km (0.073 R)
• M2: 112,647 km (0.05 R)
• M3: 248,033 km (0.084 R)
• M4: 935,136 km (0.113 R)
• M5: 1,029,383 km (0.06 R)
• M6: 1,304,493 km (0.029 R)
• M7: 1,771,538 km (0.067 R)
• M8: 1,858,903 km (0.063 R)
• M9: 1,947,764 km (0.106 R)
• M10: 2,316,673 km (0.032 R)
• M11: 2,412,266 km (0.06 R)
• M12: 3,187,033 km (0.063 R)
• M13: 3,509,416 km (0.07 R)
• M14: 3,730,223 km (0.116 R)
• M15: 4,031,513 km (0.116 R)
• M16: 4,301,537 km (0.097 R)
• M17: 5,063,290 km (0.069 R)
• M18: 5,996,182 km (0.101 R)
• M19: 6,303,905 km (0.116 R)
• M20: 6,888,982 km (0.118 R)
• M21: 7,072,389 km (0.082 R)
• M22: 7,679,756 km (0.102 R)
• M23: 7,917,767 km (0.053 R)
• M24: 8,303,729 km (0.053 R)
• M25: 8,695,675 km (0.038 R)
• M26: 8,993,674 km (0.097 R)
• M27: 9,855,807 km (0.091 R)
• M28: 9,958,880 km (0.105 R)
• M29: 10,010,641 km (0.103 R)
• M30: 10,585,396 km (0.079 R)
• M31: 10,797,077 km (0.092 R)
• M32: 11,063,511 km (0.089 R)
• M33: 11,494,502 km (0.05 R)
• M34: 11,603,110 km (0.103 R)
• M35: 11,766,621 km (0.05 R)
• M36: 12,988,835 km (0.073 R)
• M37: 13,386,017 km (0.097 R)
• M38: 14,837,266 km (0.117 R)
• M39: 15,371,780 km (0.067 R)
• M40: 17,198,370 km (0.073 R)
• M41: 17,571,915 km (0.116 R)
• M42: 18,517,224 km (0.066 R)
• M43: 19,998,543 km (0.043 R)
• M44: 20,786,325 km (0.082 R)
• M45: 21,051,263 km (0.101 R)
• M46: 23,141,444 km (0.108 R)
• M47: 23,553,586 km (0.088 R)
• M48: 24,734,362 km (0.116 R)
• M49: 25,650,350 km (0.085 R)
• M50: 25,721,259 km (0.094 R)
• M51: 26,792,679 km (0.098 R)
• M52: 28,170,775 km (0.101 R)
• M53: 28,610,742 km (0.103 R)
• M54: 28,979,052 km (0.11 R)
• M55: 29,274,957 km (0.114 R)
• M56: 30,243,154 km (0.109 R)
• M57: 30,318,103 km (0.108 R)
• M58: 30,618,346 km (0.047 R)
• M59: 31,373,366 km (0.052 R)
• M60: 31,981,930 km (0.117 R)
• M61: 32,210,965 km (0.078 R)
• M62: 33,364,963 km (0.118 R)
• M63: 34,141,824 km (0.032 R)
• M64: 35,792,487 km (0.119 R)
• M65: 35,871,774 km (0.109 R)
• M66: 36,507,715 km (0.104 R)
• M67: 36,907,291 km (0.026 R)
• M68: 37,067,360 km (0.114 R)
• M69: 39,089,026 km (0.099 R)
• M70: 39,661,537 km (0.093 R)
• M71: 40,566,754 km (0.108 R)
• M72: 40,732,059 km (0.051 R)
• M73: 41,478,702 km (0.102 R)
• M74: 41,561,879 km (0.102 R)
• M75: 44,000,025 km (0.116 R)
• M76: 44,169,819 km (0.084 R)
• M77: 44,595,424 km (0.11 R)
• M78: 44,765,966 km (0.051 R)
• M79: 44,851,386 km (0.108 R)
• M80: 45,880,171 km (0.087 R)
• M81: 47,699,281 km (0.101 R)
• M82: 48,223,472 km (0.086 R)
• M83: 48,925,086 km (0.11 R)
• M84: 49,630,141 km (0.081 R)
• M85: 50,516,209 km (0.11 R)
• M86: 51,407,513 km (0.102 R)
• M87: 52,754,193 km (0.098 R)
• M88: 52,934,608 km (0.095 R)
• M89: 56,770,746 km (0.12 R)
• M90: 56,863,198 km (0.062 R)
• M91: 57,140,702 km (0.112 R)
• M92: 57,604,455 km (0.035 R)
• M93: 59,471,287 km (0.057 R)
• M94: 61,168,475 km (0.064 R)
• M95: 63,072,706 km (0.103 R)
• M96: 63,647,760 km (0.096 R)

Planet 10 - Ice Giant

Semi-Major Axis: 14.87 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 509.4

Radius: 3.2

Gravity: 49.75 G

Time & Orbit

Eccentricity (e): 0.09

Orbit Range: 13.53 AU - 16.21 AU

Year: 25587 Days

Day: 16.2 Hours

Environment

Temp: -221 °C

Axial Tilt: 159.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 81,239,850 km

• M1: 68,516 km (0.053 R)
• M2: 400,025 km (0.041 R)
• M3: 420,220 km (0.117 R)
• M4: 483,052 km (0.063 R)
• M5: 594,502 km (0.064 R)
• M6: 1,058,704 km (0.084 R)
• M7: 1,174,044 km (0.036 R)
• M8: 1,203,515 km (0.101 R)
• M9: 1,543,700 km (0.073 R)
• M10: 1,981,424 km (0.098 R)
• M11: 2,607,640 km (0.072 R)
• M12: 2,763,222 km (0.033 R)
• M13: 3,585,412 km (0.114 R)
• M14: 4,430,790 km (0.103 R)
• M15: 5,383,429 km (0.112 R)
• M16: 5,832,073 km (0.098 R)
• M17: 6,448,715 km (0.107 R)
• M18: 8,078,285 km (0.108 R)
• M19: 8,191,231 km (0.116 R)
• M20: 9,172,294 km (0.112 R)
• M21: 9,586,980 km (0.109 R)
• M22: 9,706,508 km (0.064 R)
• M23: 9,766,497 km (0.116 R)
• M24: 10,068,236 km (0.089 R)
• M25: 10,742,773 km (0.092 R)
• M26: 11,305,560 km (0.103 R)
• M27: 12,852,252 km (0.092 R)
• M28: 12,984,048 km (0.083 R)
• M29: 13,249,135 km (0.079 R)
• M30: 13,516,018 km (0.115 R)
• M31: 13,717,227 km (0.112 R)
• M32: 14,327,138 km (0.113 R)
• M33: 14,669,717 km (0.097 R)
• M34: 15,362,953 km (0.085 R)
• M35: 15,996,052 km (0.058 R)
• M36: 17,142,420 km (0.083 R)
• M37: 18,537,570 km (0.067 R)
• M38: 18,686,569 km (0.104 R)
• M39: 19,892,627 km (0.087 R)
• M40: 20,736,210 km (0.083 R)
• M41: 21,591,461 km (0.113 R)
• M42: 22,616,954 km (0.073 R)
• M43: 24,633,384 km (0.069 R)
• M44: 25,125,710 km (0.105 R)
• M45: 25,704,355 km (0.116 R)
• M46: 26,874,509 km (0.054 R)
• M47: 28,233,157 km (0.041 R)
• M48: 29,613,946 km (0.099 R)
• M49: 31,636,958 km (0.108 R)
• M50: 33,250,969 km (0.079 R)
• M51: 34,616,349 km (0.112 R)
• M52: 35,075,465 km (0.101 R)
• M53: 35,259,769 km (0.057 R)
• M54: 36,745,127 km (0.116 R)
• M55: 36,838,625 km (0.083 R)
• M56: 37,025,922 km (0.067 R)
• M57: 38,156,134 km (0.105 R)
• M58: 39,776,727 km (0.089 R)
• M59: 40,740,287 km (0.079 R)
• M60: 41,711,776 km (0.036 R)
• M61: 43,380,391 km (0.102 R)
• M62: 45,371,389 km (0.115 R)
• M63: 49,029,356 km (0.083 R)
• M64: 49,441,647 km (0.111 R)
• M65: 49,958,508 km (0.12 R)
• M66: 51,310,873 km (0.105 R)
• M67: 52,780,822 km (0.061 R)
• M68: 53,945,291 km (0.076 R)
• M69: 54,264,384 km (0.045 R)
• M70: 54,477,411 km (0.083 R)
• M71: 55,439,625 km (0.111 R)
• M72: 56,191,952 km (0.1 R)
• M73: 56,515,383 km (0.05 R)
• M74: 56,731,402 km (0.038 R)
• M75: 57,164,189 km (0.037 R)
• M76: 59,673,693 km (0.06 R)
• M77: 61,662,597 km (0.096 R)
• M78: 62,888,701 km (0.085 R)
• M79: 63,673,192 km (0.115 R)
• M80: 64,460,825 km (0.108 R)
• M81: 64,799,365 km (0.069 R)
• M82: 65,478,240 km (0.068 R)
• M83: 65,591,635 km (0.116 R)
• M84: 66,159,509 km (0.099 R)
• M85: 67,872,853 km (0.09 R)
• M86: 68,102,486 km (0.09 R)
• M87: 70,760,840 km (0.058 R)
• M88: 71,343,225 km (0.055 R)
• M89: 73,806,503 km (0.111 R)
• M90: 74,042,569 km (0.105 R)
• M91: 75,464,197 km (0.076 R)
• M92: 76,416,836 km (0.103 R)
• M93: 77,373,664 km (0.066 R)
• M94: 79,298,839 km (0.1 R)

Kuiper Belt

Range: 30 - 53 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 315 - 10,556 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit