🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.51 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.17

Radius: 0.49

Gravity: 0.71 G

Time & Orbit

Eccentricity (e): 0.004

Orbit Range: 0.51 AU - 0.51 AU

Year: 136 Days

Day: 18.4 Hours

Environment

Temp: 201 °C

Axial Tilt: 4.9 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.73 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.5

Radius: 1.83

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 0.71 AU - 0.75 AU

Year: 234 Days

Day: 44.1 Hours

Environment

Temp: 123 °C

Axial Tilt: 32.8 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 3 - Terrestrial

Semi-Major Axis: 2.44 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.35

Radius: 1.8

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.218

Orbit Range: 1.91 AU - 2.97 AU

Year: 1428 Days

Day: 23 Hours

Environment

Temp: -83 °C

Axial Tilt: 37.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 64,599,962 km

• M1: 277,953 km (0.101 R)
• M2: 1,075,758 km (0.086 R)

Planet 4 - Terrestrial

Semi-Major Axis: 3.85 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.42

Radius: 1.81

Gravity: 1.35 G

Time & Orbit

Eccentricity (e): 0.183

Orbit Range: 3.15 AU - 4.55 AU

Year: 2831 Days

Day: 19.9 Hours

Environment

Temp: -132 °C

Axial Tilt: 41.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 64,599,962 km

• M1: 570,117 km (0.118 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.49 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 368.1

Radius: 14.8

Gravity: 1.68 G

Time & Orbit

Eccentricity (e): 0.144

Orbit Range: 3.84 AU - 5.14 AU

Year: 3565 Days

Day: 8.2 Hours

Environment

Temp: -138 °C

Axial Tilt: 37.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (65)

Outer Limit: 64,599,962 km

• M1: 193,131 km (0.104 R)
• M2: 333,603 km (0.099 R)
• M3: 455,226 km (0.104 R)
• M4: 590,762 km (0.094 R)
• M5: 835,055 km (0.093 R)
• M6: 1,031,627 km (0.11 R)
• M7: 1,125,574 km (0.058 R)
• M8: 1,496,876 km (0.091 R)
• M9: 1,703,621 km (0.073 R)
• M10: 1,920,089 km (0.034 R)
• M11: 2,325,050 km (0.068 R)
• M12: 2,639,505 km (0.034 R)
• M13: 2,757,388 km (0.116 R)
• M14: 3,044,466 km (0.117 R)
• M15: 3,357,575 km (0.086 R)
• M16: 3,830,154 km (0.097 R)
• M17: 4,066,070 km (0.086 R)
• M18: 4,220,306 km (0.085 R)
• M19: 4,499,455 km (0.081 R)
• M20: 4,677,028 km (0.104 R)
• M21: 5,057,605 km (0.098 R)
• M22: 5,186,857 km (0.033 R)
• M23: 5,524,051 km (0.113 R)
• M24: 5,676,192 km (0.073 R)
• M25: 5,829,829 km (0.08 R)
• M26: 6,358,657 km (0.097 R)
• M27: 6,638,854 km (0.088 R)
• M28: 6,862,054 km (0.113 R)
• M29: 7,149,731 km (0.112 R)
• M30: 7,588,651 km (0.101 R)
• M31: 7,864,958 km (0.107 R)
• M32: 8,122,865 km (0.067 R)
• M33: 8,824,330 km (0.074 R)
• M34: 8,958,070 km (0.047 R)
• M35: 9,889,915 km (0.085 R)
• M36: 10,005,704 km (0.08 R)
• M37: 10,262,115 km (0.04 R)
• M38: 10,473,347 km (0.112 R)
• M39: 10,709,861 km (0.039 R)
• M40: 10,805,005 km (0.045 R)
• M41: 11,020,127 km (0.097 R)
• M42: 11,430,175 km (0.112 R)
• M43: 11,722,639 km (0.111 R)
• M44: 11,992,962 km (0.1 R)
• M45: 12,265,380 km (0.036 R)
• M46: 12,439,811 km (0.096 R)
• M47: 12,968,191 km (0.107 R)
• M48: 13,145,913 km (0.086 R)
• M49: 13,247,789 km (0.11 R)
• M50: 13,632,405 km (0.075 R)
• M51: 14,150,911 km (0.088 R)
• M52: 14,386,378 km (0.103 R)
• M53: 14,940,938 km (0.099 R)
• M54: 15,368,040 km (0.073 R)
• M55: 15,583,161 km (0.043 R)
• M56: 15,691,171 km (0.049 R)
• M57: 15,907,789 km (0.058 R)
• M58: 16,536,100 km (0.113 R)
• M59: 16,673,730 km (0.11 R)
• M60: 17,284,089 km (0.053 R)
• M61: 17,704,459 km (0.05 R)
• M62: 17,958,327 km (0.098 R)
• M63: 18,412,656 km (0.103 R)
• M64: 18,526,799 km (0.091 R)
• M65: 18,957,042 km (0.094 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.67 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 434.9

Radius: 8.8

Gravity: 5.62 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 4.46 AU - 4.88 AU

Year: 3782 Days

Day: 7.8 Hours

Environment

Temp: -144 °C

Axial Tilt: 32.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 64,599,962 km

• M1: 148,850 km (0.069 R)
• M2: 209,886 km (0.112 R)
• M3: 287,378 km (0.077 R)
• M4: 669,002 km (0.1 R)
• M5: 756,965 km (0.11 R)
• M6: 870,211 km (0.057 R)
• M7: 945,309 km (0.114 R)
• M8: 1,102,536 km (0.072 R)
• M9: 1,220,270 km (0.098 R)
• M10: 1,342,342 km (0.057 R)
• M11: 1,638,396 km (0.075 R)
• M12: 1,773,782 km (0.064 R)
• M13: 1,926,821 km (0.101 R)
• M14: 2,069,986 km (0.087 R)
• M15: 2,186,971 km (0.11 R)
• M16: 2,276,281 km (0.063 R)
• M17: 2,366,638 km (0.065 R)
• M18: 2,566,950 km (0.103 R)
• M19: 2,984,029 km (0.084 R)
• M20: 3,268,265 km (0.077 R)
• M21: 3,684,596 km (0.053 R)
• M22: 3,827,013 km (0.036 R)
• M23: 4,172,883 km (0.115 R)
• M24: 4,246,934 km (0.098 R)
• M25: 4,528,776 km (0.099 R)
• M26: 5,051,471 km (0.086 R)
• M27: 5,390,460 km (0.102 R)
• M28: 5,654,650 km (0.034 R)
• M29: 6,090,279 km (0.072 R)
• M30: 6,174,503 km (0.084 R)
• M31: 6,796,830 km (0.076 R)
• M32: 6,884,344 km (0.106 R)
• M33: 7,506,672 km (0.116 R)
• M34: 7,824,717 km (0.101 R)
• M35: 7,985,385 km (0.116 R)
• M36: 8,100,725 km (0.105 R)
• M37: 8,520,945 km (0.042 R)
• M38: 8,828,818 km (0.107 R)
• M39: 9,164,366 km (0.095 R)
• M40: 9,528,636 km (0.114 R)
• M41: 9,774,126 km (0.062 R)
• M42: 10,196,292 km (0.094 R)
• M43: 10,955,800 km (0.051 R)
• M44: 11,368,391 km (0.112 R)
• M45: 11,550,452 km (0.073 R)
• M46: 11,681,051 km (0.098 R)
• M47: 11,864,757 km (0.106 R)
• M48: 12,582,527 km (0.098 R)
• M49: 12,851,953 km (0.079 R)
• M50: 13,095,947 km (0.1 R)
• M51: 13,423,866 km (0.062 R)
• M52: 13,588,723 km (0.116 R)
• M53: 13,782,003 km (0.09 R)
• M54: 13,920,680 km (0.104 R)
• M55: 14,395,504 km (0.11 R)
• M56: 15,017,681 km (0.112 R)
• M57: 15,246,267 km (0.053 R)
• M58: 15,533,495 km (0.095 R)
• M59: 16,054,993 km (0.1 R)
• M60: 16,142,508 km (0.072 R)
• M61: 16,200,851 km (0.112 R)
• M62: 16,405,800 km (0.078 R)
• M63: 16,523,384 km (0.108 R)
• M64: 16,641,118 km (0.076 R)
• M65: 16,996,263 km (0.098 R)
• M66: 17,264,193 km (0.09 R)
• M67: 17,323,882 km (0.084 R)
• M68: 17,473,630 km (0.053 R)
• M69: 17,804,391 km (0.053 R)
• M70: 18,167,465 km (0.116 R)
• M71: 18,778,273 km (0.098 R)
• M72: 18,839,608 km (0.033 R)
• M73: 18,993,544 km (0.115 R)
• M74: 19,488,863 km (0.029 R)
• M75: 19,957,104 km (0.083 R)
• M76: 20,145,448 km (0.093 R)
• M77: 20,523,781 km (0.103 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.38 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 535.5

Radius: 9.7

Gravity: 5.69 G

Time & Orbit

Eccentricity (e): 0.213

Orbit Range: 5.02 AU - 7.74 AU

Year: 6039 Days

Day: 7.5 Hours

Environment

Temp: -151 °C

Axial Tilt: 45.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 64,599,962 km

• M1: 184,305 km (0.102 R)
• M2: 309,069 km (0.069 R)
• M3: 440,865 km (0.084 R)
• M4: 594,053 km (0.103 R)
• M5: 805,285 km (0.093 R)
• M6: 1,251,536 km (0.109 R)
• M7: 1,346,231 km (0.107 R)
• M8: 1,526,197 km (0.11 R)
• M9: 1,593,666 km (0.099 R)
• M10: 1,679,535 km (0.086 R)
• M11: 1,873,863 km (0.101 R)
• M12: 2,362,450 km (0.055 R)
• M13: 2,540,621 km (0.046 R)
• M14: 2,682,439 km (0.047 R)
• M15: 2,806,007 km (0.116 R)
• M16: 2,910,427 km (0.11 R)
• M17: 2,973,856 km (0.093 R)
• M18: 3,144,996 km (0.075 R)
• M19: 3,609,797 km (0.08 R)
• M20: 3,746,529 km (0.057 R)
• M21: 3,838,831 km (0.106 R)
• M22: 4,119,925 km (0.093 R)
• M23: 4,456,371 km (0.087 R)
• M24: 4,554,208 km (0.067 R)
• M25: 5,054,014 km (0.099 R)
• M26: 5,466,306 km (0.043 R)
• M27: 5,571,174 km (0.061 R)
• M28: 5,836,112 km (0.102 R)
• M29: 5,970,152 km (0.066 R)
• M30: 6,051,084 km (0.045 R)
• M31: 6,241,373 km (0.077 R)
• M32: 7,774,751 km (0.038 R)
• M33: 7,981,794 km (0.104 R)
• M34: 8,160,564 km (0.097 R)
• M35: 8,250,622 km (0.118 R)
• M36: 8,613,696 km (0.089 R)
• M37: 8,889,405 km (0.104 R)
• M38: 9,168,106 km (0.088 R)
• M39: 10,117,753 km (0.101 R)
• M40: 10,214,543 km (0.04 R)
• M41: 10,279,169 km (0.073 R)
• M42: 10,801,116 km (0.109 R)
• M43: 11,365,249 km (0.088 R)
• M44: 11,499,439 km (0.102 R)
• M45: 11,972,916 km (0.096 R)
• M46: 12,041,133 km (0.102 R)
• M47: 12,591,354 km (0.096 R)
• M48: 12,695,324 km (0.081 R)
• M49: 13,787,389 km (0.078 R)
• M50: 13,858,896 km (0.113 R)
• M51: 14,435,297 km (0.071 R)
• M52: 14,726,414 km (0.045 R)
• M53: 15,093,079 km (0.12 R)
• M54: 15,203,632 km (0.107 R)
• M55: 15,351,584 km (0.102 R)
• M56: 15,686,085 km (0.102 R)
• M57: 15,835,533 km (0.032 R)
• M58: 16,022,979 km (0.068 R)
• M59: 16,211,173 km (0.101 R)
• M60: 16,475,812 km (0.091 R)
• M61: 17,898,637 km (0.112 R)
• M62: 18,368,524 km (0.045 R)
• M63: 18,763,163 km (0.085 R)
• M64: 18,921,887 km (0.099 R)
• M65: 19,080,909 km (0.103 R)
• M66: 19,802,420 km (0.051 R)
• M67: 20,004,526 km (0.062 R)
• M68: 20,737,406 km (0.06 R)
• M69: 21,978,321 km (0.057 R)
• M70: 22,355,307 km (0.113 R)
• M71: 23,927,431 km (0.089 R)
• M72: 24,922,556 km (0.063 R)
• M73: 25,535,010 km (0.076 R)
• M74: 25,754,919 km (0.093 R)
• M75: 26,019,558 km (0.081 R)
• M76: 26,107,970 km (0.069 R)
• M77: 26,507,247 km (0.117 R)
• M78: 26,729,998 km (0.066 R)
• M79: 27,671,866 km (0.104 R)
• M80: 27,897,759 km (0.09 R)
• M81: 30,562,546 km (0.074 R)
• M82: 30,983,365 km (0.116 R)

Planet 8 - Gas Giant

Semi-Major Axis: 6.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 889.2

Radius: 10.3

Gravity: 8.38 G

Time & Orbit

Eccentricity (e): 0.119

Orbit Range: 6.14 AU - 7.8 AU

Year: 6896 Days

Day: 12.1 Hours

Environment

Temp: -161 °C

Axial Tilt: 29.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 64,599,962 km

• M1: 131,796 km (0.09 R)
• M2: 696,378 km (0.109 R)
• M3: 881,580 km (0.072 R)
• M4: 1,014,423 km (0.041 R)
• M5: 1,083,388 km (0.119 R)
• M6: 1,338,153 km (0.081 R)
• M7: 1,492,538 km (0.114 R)
• M8: 1,572,124 km (0.093 R)
• M9: 1,926,073 km (0.096 R)
• M10: 2,191,160 km (0.077 R)
• M11: 2,282,116 km (0.09 R)
• M12: 2,515,339 km (0.117 R)
• M13: 2,683,187 km (0.116 R)
• M14: 2,756,341 km (0.067 R)
• M15: 3,080,968 km (0.047 R)
• M16: 4,127,405 km (0.069 R)
• M17: 4,557,350 km (0.083 R)
• M18: 6,123,639 km (0.073 R)
• M19: 6,350,729 km (0.074 R)
• M20: 6,980,985 km (0.094 R)
• M21: 7,082,262 km (0.112 R)
• M22: 8,842,730 km (0.069 R)
• M23: 9,136,391 km (0.054 R)
• M24: 9,321,593 km (0.089 R)
• M25: 9,809,132 km (0.091 R)
• M26: 9,998,822 km (0.115 R)
• M27: 10,808,745 km (0.068 R)
• M28: 11,519,784 km (0.047 R)
• M29: 11,639,762 km (0.111 R)
• M30: 11,760,188 km (0.081 R)
• M31: 12,245,932 km (0.102 R)
• M32: 12,450,283 km (0.029 R)
• M33: 12,820,986 km (0.103 R)
• M34: 13,153,542 km (0.11 R)
• M35: 13,530,978 km (0.107 R)
• M36: 14,902,192 km (0.065 R)
• M37: 15,120,306 km (0.09 R)
• M38: 15,648,386 km (0.078 R)
• M39: 15,737,098 km (0.094 R)
• M40: 15,870,240 km (0.045 R)
• M41: 16,003,831 km (0.109 R)
• M42: 16,272,209 km (0.087 R)
• M43: 16,451,876 km (0.069 R)
• M44: 17,177,276 km (0.091 R)
• M45: 17,590,017 km (0.085 R)
• M46: 18,331,723 km (0.105 R)
• M47: 18,471,896 km (0.099 R)
• M48: 18,612,369 km (0.089 R)
• M49: 20,811,906 km (0.103 R)
• M50: 20,958,213 km (0.111 R)
• M51: 21,448,445 km (0.078 R)
• M52: 22,439,980 km (0.074 R)
• M53: 22,941,282 km (0.067 R)
• M54: 23,142,940 km (0.053 R)
• M55: 24,673,476 km (0.068 R)
• M56: 25,399,026 km (0.036 R)
• M57: 25,555,355 km (0.099 R)
• M58: 26,394,749 km (0.09 R)
• M59: 26,500,216 km (0.026 R)
• M60: 26,817,812 km (0.063 R)
• M61: 27,030,091 km (0.11 R)
• M62: 27,136,605 km (0.078 R)
• M63: 27,670,669 km (0.1 R)
• M64: 29,622,024 km (0.117 R)
• M65: 29,731,829 km (0.064 R)
• M66: 30,171,946 km (0.109 R)
• M67: 31,170,362 km (0.061 R)
• M68: 32,405,143 km (0.098 R)
• M69: 32,688,032 km (0.109 R)
• M70: 32,914,972 km (0.057 R)
• M71: 34,172,193 km (0.088 R)
• M72: 34,402,574 km (0.108 R)
• M73: 34,980,470 km (0.117 R)
• M74: 35,386,928 km (0.107 R)
• M75: 35,561,658 km (0.114 R)
• M76: 35,736,687 km (0.094 R)
• M77: 36,674,666 km (0.058 R)
• M78: 37,977,813 km (0.099 R)
• M79: 40,690,022 km (0.085 R)

Planet 9 - Gas Giant

Semi-Major Axis: 11.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 885

Radius: 9.7

Gravity: 9.41 G

Time & Orbit

Eccentricity (e): 0.022

Orbit Range: 10.81 AU - 11.29 AU

Year: 13765 Days

Day: 14.1 Hours

Environment

Temp: -178 °C

Axial Tilt: 36.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 64,599,962 km

• M1: 143,464 km (0.114 R)
• M2: 422,764 km (0.117 R)
• M3: 715,676 km (0.087 R)
• M4: 777,610 km (0.055 R)
• M5: 841,488 km (0.065 R)
• M6: 1,919,939 km (0.066 R)
• M7: 2,098,709 km (0.066 R)
• M8: 2,190,262 km (0.077 R)
• M9: 2,283,163 km (0.115 R)
• M10: 2,767,561 km (0.03 R)
• M11: 2,970,266 km (0.11 R)
• M12: 3,570,901 km (0.094 R)
• M13: 4,131,744 km (0.068 R)
• M14: 4,247,383 km (0.042 R)
• M15: 4,640,227 km (0.063 R)
• M16: 4,760,354 km (0.09 R)
• M17: 5,293,072 km (0.076 R)
• M18: 5,931,107 km (0.053 R)
• M19: 6,728,912 km (0.113 R)
• M20: 6,910,823 km (0.083 R)
• M21: 7,372,632 km (0.111 R)
• M22: 8,326,019 km (0.068 R)
• M23: 8,570,462 km (0.109 R)
• M24: 8,916,781 km (0.119 R)
• M25: 9,116,644 km (0.109 R)
• M26: 9,674,046 km (0.103 R)
• M27: 10,034,576 km (0.117 R)
• M28: 10,928,274 km (0.102 R)
• M29: 11,683,444 km (0.1 R)
• M30: 12,511,020 km (0.1 R)
• M31: 12,791,216 km (0.062 R)
• M32: 13,130,056 km (0.045 R)
• M33: 13,643,924 km (0.077 R)
• M34: 14,456,390 km (0.057 R)
• M35: 14,691,408 km (0.089 R)
• M36: 15,105,645 km (0.096 R)
• M37: 15,704,186 km (0.114 R)
• M38: 16,862,822 km (0.114 R)
• M39: 16,924,606 km (0.048 R)
• M40: 17,483,653 km (0.071 R)
• M41: 17,608,717 km (0.085 R)
• M42: 17,671,398 km (0.072 R)
• M43: 17,796,911 km (0.104 R)
• M44: 19,196,997 km (0.082 R)
• M45: 20,106,253 km (0.093 R)
• M46: 20,237,301 km (0.087 R)
• M47: 21,229,284 km (0.103 R)
• M48: 22,712,697 km (0.086 R)
• M49: 23,260,375 km (0.102 R)
• M50: 25,281,891 km (0.084 R)
• M51: 26,277,764 km (0.087 R)
• M52: 27,795,733 km (0.063 R)
• M53: 28,234,653 km (0.092 R)
• M54: 28,749,569 km (0.107 R)
• M55: 28,823,321 km (0.106 R)
• M56: 29,490,527 km (0.059 R)
• M57: 29,714,176 km (0.102 R)
• M58: 30,313,017 km (0.055 R)
• M59: 30,840,199 km (0.12 R)
• M60: 32,440,149 km (0.053 R)
• M61: 32,593,935 km (0.114 R)
• M62: 32,825,064 km (0.11 R)
• M63: 34,144,966 km (0.065 R)
• M64: 34,458,074 km (0.091 R)
• M65: 35,720,082 km (0.091 R)
• M66: 35,799,369 km (0.06 R)
• M67: 36,596,426 km (0.064 R)
• M68: 36,756,496 km (0.112 R)
• M69: 37,883,716 km (0.058 R)
• M70: 39,431,605 km (0.05 R)
• M71: 40,254,543 km (0.078 R)
• M72: 41,917,473 km (0.095 R)
• M73: 42,085,023 km (0.103 R)
• M74: 42,168,797 km (0.103 R)
• M75: 43,179,331 km (0.114 R)
• M76: 44,112,523 km (0.069 R)
• M77: 45,395,923 km (0.112 R)
• M78: 47,126,022 km (0.119 R)
• M79: 47,824,195 km (0.117 R)
• M80: 49,672,926 km (0.086 R)
• M81: 52,534,733 km (0.08 R)
• M82: 52,805,655 km (0.104 R)
• M83: 53,621,562 km (0.071 R)
• M84: 53,712,517 km (0.047 R)
• M85: 53,803,473 km (0.052 R)
• M86: 56,741,276 km (0.117 R)
• M87: 57,669,979 km (0.108 R)
• M88: 58,229,625 km (0.097 R)
• M89: 58,791,066 km (0.095 R)
• M90: 61,529,903 km (0.103 R)
• M91: 62,197,110 km (0.093 R)
• M92: 62,866,860 km (0.062 R)
• M93: 62,962,752 km (0.092 R)
• M94: 64,116,899 km (0.1 R)

Kuiper Belt

Range: 30 - 45 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 485 - 11,495 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit