🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.78 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.47

Radius: 0.74

Gravity: 0.86 G

Time & Orbit

Eccentricity (e): 0.097

Orbit Range: 0.7 AU - 0.86 AU

Year: 261 Days

Day: 26.5 Hours

Environment

Temp: 172 °C

Axial Tilt: 3.1 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.21 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.92

Radius: 1.3

Gravity: 1.14 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 1.03 AU - 1.39 AU

Year: 504 Days

Day: 25.5 Hours

Environment

Temp: 3 °C

Axial Tilt: 0.1 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (1)

Outer Limit: 45,322,605 km

• M1: 35,604 km (0.088 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.66 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.21

Radius: 1.78

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 1.57 AU - 1.75 AU

Year: 810 Days

Day: 13.9 Hours

Environment

Temp: -62 °C

Axial Tilt: 34.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 45,322,605 km

• M1: 428,747 km (0.096 R)
• M2: 894,745 km (0.086 R)

Planet 4 - Terrestrial

Semi-Major Axis: 1.94 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.79

Radius: 1.7

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 1.8 AU - 2.08 AU

Year: 1023 Days

Day: 29.9 Hours

Environment

Temp: -76 °C

Axial Tilt: 48.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 3.61 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.89

Radius: 1.72

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.228

Orbit Range: 2.79 AU - 4.43 AU

Year: 2598 Days

Day: 21.8 Hours

Environment

Temp: -136 °C

Axial Tilt: 36.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 4.33 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 987.7

Radius: 12.6

Gravity: 6.22 G

Time & Orbit

Eccentricity (e): 0.203

Orbit Range: 3.45 AU - 5.21 AU

Year: 3413 Days

Day: 10.7 Hours

Environment

Temp: -142 °C

Axial Tilt: 31.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 45,322,605 km

• M1: 163,361 km (0.095 R)
• M2: 336,296 km (0.111 R)
• M3: 450,589 km (0.06 R)
• M4: 602,431 km (0.113 R)
• M5: 751,580 km (0.078 R)
• M6: 1,263,204 km (0.117 R)
• M7: 1,346,381 km (0.092 R)
• M8: 1,533,677 km (0.082 R)
• M9: 1,668,615 km (0.114 R)
• M10: 1,792,033 km (0.118 R)
• M11: 1,870,721 km (0.101 R)
• M12: 1,966,913 km (0.099 R)
• M13: 2,064,750 km (0.082 R)
• M14: 2,543,313 km (0.098 R)
• M15: 2,686,479 km (0.12 R)
• M16: 3,228,172 km (0.046 R)
• M17: 3,344,560 km (0.054 R)
• M18: 3,541,730 km (0.042 R)
• M19: 3,763,134 km (0.107 R)
• M20: 3,926,944 km (0.106 R)
• M21: 4,198,464 km (0.095 R)
• M22: 4,368,707 km (0.089 R)
• M23: 4,782,046 km (0.112 R)
• M24: 5,253,728 km (0.107 R)
• M25: 5,483,660 km (0.045 R)
• M26: 5,576,560 km (0.074 R)
• M27: 5,905,974 km (0.108 R)
• M28: 6,001,268 km (0.068 R)
• M29: 6,633,170 km (0.065 R)
• M30: 7,260,882 km (0.108 R)
• M31: 7,363,058 km (0.063 R)
• M32: 7,465,831 km (0.086 R)
• M33: 9,284,044 km (0.029 R)
• M34: 9,618,545 km (0.082 R)
• M35: 9,702,768 km (0.093 R)
• M36: 10,559,067 km (0.027 R)
• M37: 10,675,154 km (0.083 R)
• M38: 11,202,487 km (0.113 R)
• M39: 11,499,140 km (0.106 R)
• M40: 12,557,844 km (0.054 R)
• M41: 12,649,996 km (0.09 R)
• M42: 13,020,999 km (0.066 R)
• M43: 13,207,996 km (0.109 R)
• M44: 13,301,794 km (0.097 R)
• M45: 13,521,404 km (0.111 R)
• M46: 13,742,360 km (0.069 R)
• M47: 14,028,092 km (0.093 R)
• M48: 14,315,918 km (0.069 R)
• M49: 15,190,916 km (0.073 R)
• M50: 15,321,964 km (0.107 R)
• M51: 15,750,711 km (0.075 R)
• M52: 17,026,482 km (0.103 R)
• M53: 18,300,457 km (0.06 R)
• M54: 18,544,900 km (0.064 R)
• M55: 19,037,227 km (0.108 R)
• M56: 19,676,309 km (0.102 R)
• M57: 20,142,306 km (0.079 R)
• M58: 20,358,625 km (0.082 R)
• M59: 20,503,286 km (0.114 R)
• M60: 20,720,951 km (0.112 R)
• M61: 21,451,886 km (0.076 R)
• M62: 21,783,544 km (0.089 R)
• M63: 22,079,748 km (0.115 R)
• M64: 22,340,048 km (0.043 R)
• M65: 22,713,744 km (0.095 R)
• M66: 23,391,572 km (0.097 R)
• M67: 23,885,245 km (0.106 R)
• M68: 24,420,805 km (0.041 R)
• M69: 24,613,038 km (0.11 R)
• M70: 25,542,640 km (0.11 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.64 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 930.7

Radius: 14.5

Gravity: 4.43 G

Time & Orbit

Eccentricity (e): 0.032

Orbit Range: 4.49 AU - 4.79 AU

Year: 3786 Days

Day: 12.8 Hours

Environment

Temp: -136 °C

Axial Tilt: 4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 45,322,605 km

• M1: 241,451 km (0.099 R)
• M2: 338,390 km (0.099 R)
• M3: 443,857 km (0.095 R)
• M4: 536,308 km (0.094 R)
• M5: 680,521 km (0.107 R)
• M6: 840,291 km (0.102 R)
• M7: 1,014,124 km (0.111 R)
• M8: 1,187,358 km (0.074 R)
• M9: 1,284,896 km (0.113 R)
• M10: 1,400,086 km (0.073 R)
• M11: 1,504,057 km (0.102 R)
• M12: 1,595,312 km (0.108 R)
• M13: 2,218,237 km (0.086 R)
• M14: 2,376,661 km (0.108 R)
• M15: 2,667,629 km (0.041 R)
• M16: 2,912,820 km (0.117 R)
• M17: 3,185,238 km (0.046 R)
• M18: 3,364,905 km (0.056 R)
• M19: 3,692,823 km (0.117 R)
• M20: 3,860,672 km (0.106 R)
• M21: 4,204,299 km (0.076 R)
• M22: 4,921,321 km (0.119 R)
• M23: 5,700,726 km (0.054 R)
• M24: 5,846,584 km (0.091 R)
• M25: 5,944,571 km (0.096 R)
• M26: 6,092,523 km (0.081 R)
• M27: 6,417,599 km (0.105 R)
• M28: 6,544,009 km (0.118 R)
• M29: 6,696,898 km (0.061 R)
• M30: 7,006,416 km (0.05 R)
• M31: 7,559,330 km (0.116 R)
• M32: 7,719,998 km (0.095 R)
• M33: 8,318,689 km (0.078 R)
• M34: 8,567,919 km (0.093 R)
• M35: 8,791,568 km (0.109 R)
• M36: 8,932,339 km (0.109 R)
• M37: 9,130,706 km (0.119 R)
• M38: 9,705,611 km (0.066 R)
• M39: 9,821,998 km (0.09 R)
• M40: 9,997,476 km (0.118 R)
• M41: 10,381,195 km (0.079 R)
• M42: 10,500,275 km (0.11 R)
• M43: 11,407,885 km (0.088 R)
• M44: 12,089,602 km (0.103 R)
• M45: 12,277,796 km (0.103 R)
• M46: 12,593,598 km (0.109 R)
• M47: 14,047,988 km (0.057 R)
• M48: 14,146,872 km (0.101 R)
• M49: 14,444,871 km (0.118 R)
• M50: 14,578,013 km (0.12 R)
• M51: 14,778,325 km (0.053 R)
• M52: 15,080,812 km (0.064 R)
• M53: 15,419,202 km (0.074 R)
• M54: 16,797,747 km (0.101 R)
• M55: 17,219,014 km (0.085 R)
• M56: 17,360,235 km (0.109 R)
• M57: 18,215,486 km (0.1 R)
• M58: 18,612,219 km (0.077 R)
• M59: 19,377,263 km (0.037 R)
• M60: 19,560,969 km (0.09 R)
• M61: 19,708,472 km (0.109 R)
• M62: 20,562,975 km (0.083 R)
• M63: 21,429,745 km (0.056 R)
• M64: 22,116,400 km (0.071 R)
• M65: 22,231,590 km (0.064 R)
• M66: 22,462,569 km (0.086 R)
• M67: 23,433,160 km (0.115 R)
• M68: 23,668,178 km (0.064 R)
• M69: 24,536,594 km (0.08 R)
• M70: 24,934,823 km (0.114 R)
• M71: 25,134,686 km (0.101 R)
• M72: 26,671,356 km (0.12 R)
• M73: 26,957,686 km (0.108 R)
• M74: 27,080,805 km (0.092 R)
• M75: 27,657,505 km (0.065 R)

Planet 8 - Gas Giant

Semi-Major Axis: 5.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 487.1

Radius: 14.2

Gravity: 2.42 G

Time & Orbit

Eccentricity (e): 0.182

Orbit Range: 4.74 AU - 6.86 AU

Year: 5290 Days

Day: 13 Hours

Environment

Temp: -148 °C

Axial Tilt: 22.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 45,322,605 km

• M1: 468,989 km (0.1 R)
• M2: 605,871 km (0.09 R)
• M3: 841,638 km (0.106 R)
• M4: 939,923 km (0.041 R)
• M5: 1,191,098 km (0.113 R)
• M6: 1,586,785 km (0.092 R)
• M7: 1,824,645 km (0.109 R)
• M8: 1,989,801 km (0.103 R)
• M9: 2,265,061 km (0.109 R)
• M10: 2,461,633 km (0.059 R)
• M11: 2,948,873 km (0.099 R)
• M12: 3,065,709 km (0.044 R)
• M13: 3,224,133 km (0.115 R)
• M14: 3,385,101 km (0.101 R)
• M15: 3,590,349 km (0.111 R)
• M16: 3,778,693 km (0.083 R)
• M17: 3,884,608 km (0.097 R)
• M18: 4,013,262 km (0.074 R)
• M19: 4,186,945 km (0.086 R)
• M20: 4,296,900 km (0.028 R)
• M21: 4,519,501 km (0.092 R)
• M22: 4,746,142 km (0.104 R)
• M23: 5,023,048 km (0.066 R)
• M24: 5,163,520 km (0.094 R)
• M25: 5,400,483 km (0.083 R)
• M26: 5,689,805 km (0.065 R)
• M27: 5,836,411 km (0.106 R)
• M28: 6,083,547 km (0.099 R)
• M29: 6,537,128 km (0.076 R)
• M30: 6,897,659 km (0.099 R)
• M31: 7,344,059 km (0.115 R)
• M32: 7,557,535 km (0.083 R)
• M33: 7,665,096 km (0.107 R)
• M34: 7,854,337 km (0.05 R)
• M35: 8,045,224 km (0.037 R)
• M36: 8,431,785 km (0.095 R)
• M37: 8,796,205 km (0.077 R)
• M38: 9,194,435 km (0.106 R)
• M39: 10,694,752 km (0.11 R)
• M40: 11,242,430 km (0.082 R)
• M41: 12,049,660 km (0.102 R)
• M42: 13,004,244 km (0.052 R)
• M43: 13,490,736 km (0.077 R)
• M44: 15,257,188 km (0.073 R)
• M45: 15,632,977 km (0.083 R)
• M46: 16,219,700 km (0.09 R)
• M47: 16,638,126 km (0.092 R)
• M48: 17,379,084 km (0.101 R)
• M49: 17,485,897 km (0.088 R)
• M50: 17,699,971 km (0.064 R)
• M51: 18,022,803 km (0.081 R)
• M52: 18,167,016 km (0.057 R)
• M53: 18,311,378 km (0.112 R)
• M54: 18,492,690 km (0.119 R)
• M55: 18,637,950 km (0.102 R)
• M56: 18,747,306 km (0.115 R)
• M57: 18,856,812 km (0.111 R)
• M58: 18,966,467 km (0.098 R)
• M59: 19,186,525 km (0.104 R)
• M60: 20,449,431 km (0.059 R)
• M61: 21,509,631 km (0.086 R)
• M62: 21,700,817 km (0.111 R)
• M63: 21,931,048 km (0.093 R)
• M64: 22,084,984 km (0.111 R)
• M65: 23,094,321 km (0.077 R)
• M66: 24,118,618 km (0.081 R)
• M67: 24,277,490 km (0.119 R)
• M68: 24,836,388 km (0.108 R)
• M69: 25,723,354 km (0.095 R)
• M70: 26,129,811 km (0.058 R)
• M71: 26,620,642 km (0.082 R)
• M72: 27,196,893 km (0.038 R)
• M73: 27,569,691 km (0.105 R)

Planet 9 - Gas Giant

Semi-Major Axis: 6.38 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 706.8

Radius: 14.6

Gravity: 3.32 G

Time & Orbit

Eccentricity (e): 0.235

Orbit Range: 4.88 AU - 7.88 AU

Year: 6104 Days

Day: 5.5 Hours

Environment

Temp: -157 °C

Axial Tilt: 32.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 45,322,605 km

• M1: 428,299 km (0.111 R)
• M2: 809,923 km (0.071 R)
• M3: 936,782 km (0.098 R)
• M4: 1,164,919 km (0.04 R)
• M5: 1,310,926 km (0.092 R)
• M6: 1,446,462 km (0.109 R)
• M7: 1,640,789 km (0.093 R)
• M8: 1,732,194 km (0.082 R)
• M9: 1,920,388 km (0.08 R)
• M10: 2,135,659 km (0.12 R)
• M11: 2,236,189 km (0.109 R)
• M12: 2,400,447 km (0.118 R)
• M13: 2,719,689 km (0.07 R)
• M14: 2,917,906 km (0.065 R)
• M15: 3,375,975 km (0.085 R)
• M16: 3,470,521 km (0.115 R)
• M17: 4,156,427 km (0.104 R)
• M18: 4,309,017 km (0.045 R)
• M19: 5,045,637 km (0.067 R)
• M20: 5,154,095 km (0.072 R)
• M21: 5,456,582 km (0.03 R)
• M22: 5,764,904 km (0.075 R)
• M23: 6,194,549 km (0.08 R)
• M24: 6,310,936 km (0.085 R)
• M25: 6,457,542 km (0.078 R)
• M26: 7,207,177 km (0.099 R)
• M27: 7,391,182 km (0.086 R)
• M28: 7,639,066 km (0.107 R)
• M29: 8,399,322 km (0.077 R)
• M30: 8,886,712 km (0.086 R)
• M31: 9,719,673 km (0.118 R)
• M32: 10,404,083 km (0.091 R)
• M33: 10,822,209 km (0.047 R)
• M34: 10,962,831 km (0.08 R)
• M35: 11,424,191 km (0.1 R)
• M36: 11,964,389 km (0.105 R)
• M37: 12,146,300 km (0.064 R)
• M38: 12,255,806 km (0.093 R)
• M39: 12,623,517 km (0.057 R)
• M40: 12,920,469 km (0.086 R)
• M41: 13,069,618 km (0.064 R)
• M42: 13,634,649 km (0.112 R)
• M43: 13,824,788 km (0.117 R)
• M44: 14,555,125 km (0.075 R)
• M45: 15,495,796 km (0.106 R)
• M46: 16,577,538 km (0.078 R)
• M47: 16,699,162 km (0.059 R)
• M48: 18,350,273 km (0.098 R)
• M49: 18,560,309 km (0.096 R)
• M50: 18,771,092 km (0.079 R)
• M51: 19,708,323 km (0.095 R)
• M52: 20,096,080 km (0.063 R)
• M53: 21,098,685 km (0.037 R)
• M54: 23,152,215 km (0.104 R)
• M55: 23,379,305 km (0.092 R)
• M56: 24,479,448 km (0.106 R)
• M57: 24,989,427 km (0.113 R)
• M58: 25,082,477 km (0.036 R)
• M59: 25,222,351 km (0.118 R)
• M60: 25,362,374 km (0.05 R)
• M61: 26,350,468 km (0.084 R)
• M62: 26,968,457 km (0.069 R)
• M63: 28,753,309 km (0.081 R)
• M64: 28,850,847 km (0.112 R)
• M65: 29,144,208 km (0.111 R)
• M66: 29,340,331 km (0.107 R)
• M67: 29,635,488 km (0.109 R)
• M68: 29,980,909 km (0.092 R)
• M69: 31,175,448 km (0.057 R)
• M70: 31,879,456 km (0.064 R)
• M71: 32,284,118 km (0.027 R)
• M72: 32,486,973 km (0.077 R)
• M73: 32,792,302 km (0.094 R)
• M74: 32,945,341 km (0.097 R)
• M75: 33,098,529 km (0.055 R)
• M76: 33,354,341 km (0.089 R)
• M77: 33,456,965 km (0.085 R)
• M78: 33,868,210 km (0.113 R)
• M79: 34,695,636 km (0.055 R)

Planet 10 - Gas Giant

Semi-Major Axis: 9.89 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 417.3

Radius: 12.2

Gravity: 2.8 G

Time & Orbit

Eccentricity (e): 0.209

Orbit Range: 7.82 AU - 11.96 AU

Year: 11780 Days

Day: 8.6 Hours

Environment

Temp: -175 °C

Axial Tilt: 5.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 45,322,605 km

• M1: 279,449 km (0.117 R)
• M2: 499,657 km (0.118 R)
• M3: 582,983 km (0.039 R)
• M4: 734,376 km (0.064 R)
• M5: 849,118 km (0.052 R)
• M6: 1,290,880 km (0.05 R)
• M7: 1,474,437 km (0.106 R)
• M8: 1,890,319 km (0.103 R)
• M9: 2,148,076 km (0.086 R)
• M10: 2,802,267 km (0.086 R)
• M11: 3,069,748 km (0.101 R)
• M12: 3,289,956 km (0.075 R)
• M13: 3,951,927 km (0.092 R)
• M14: 4,191,882 km (0.119 R)
• M15: 4,375,139 km (0.072 R)
• M16: 4,844,727 km (0.099 R)
• M17: 5,396,444 km (0.073 R)
• M18: 5,495,927 km (0.099 R)
• M19: 5,696,687 km (0.095 R)
• M20: 6,880,156 km (0.095 R)
• M21: 6,988,315 km (0.075 R)
• M22: 7,169,628 km (0.112 R)
• M23: 7,760,390 km (0.111 R)
• M24: 7,872,887 km (0.118 R)
• M25: 8,290,265 km (0.073 R)
• M26: 8,520,945 km (0.107 R)
• M27: 8,871,004 km (0.061 R)
• M28: 8,949,393 km (0.083 R)
• M29: 9,384,873 km (0.051 R)
• M30: 10,566,247 km (0.058 R)
• M31: 10,691,161 km (0.109 R)
• M32: 11,111,083 km (0.097 R)
• M33: 11,880,464 km (0.085 R)
• M34: 12,184,298 km (0.1 R)
• M35: 12,315,346 km (0.11 R)
• M36: 12,799,743 km (0.116 R)
• M37: 13,515,569 km (0.114 R)
• M38: 14,613,618 km (0.105 R)
• M39: 14,799,568 km (0.081 R)
• M40: 15,456,003 km (0.07 R)
• M41: 15,645,394 km (0.119 R)
• M42: 16,700,358 km (0.073 R)
• M43: 16,943,455 km (0.079 R)
• M44: 17,630,109 km (0.038 R)
• M45: 17,728,844 km (0.07 R)
• M46: 18,225,957 km (0.081 R)
• M47: 19,386,388 km (0.043 R)
• M48: 19,488,414 km (0.072 R)
• M49: 20,156,069 km (0.079 R)
• M50: 20,259,441 km (0.119 R)
• M51: 22,363,834 km (0.092 R)
• M52: 23,605,198 km (0.093 R)
• M53: 24,924,202 km (0.033 R)
• M54: 25,481,005 km (0.047 R)
• M55: 25,648,705 km (0.03 R)
• M56: 26,267,142 km (0.095 R)
• M57: 27,061,357 km (0.055 R)
• M58: 27,289,793 km (0.096 R)
• M59: 27,921,096 km (0.12 R)
• M60: 28,441,248 km (0.073 R)
• M61: 28,789,811 km (0.083 R)
• M62: 30,612,960 km (0.034 R)
• M63: 30,791,431 km (0.113 R)
• M64: 31,029,890 km (0.087 R)
• M65: 31,448,614 km (0.08 R)
• M66: 31,568,591 km (0.076 R)
• M67: 31,869,283 km (0.109 R)
• M68: 33,020,289 km (0.102 R)
• M69: 33,509,025 km (0.114 R)
• M70: 33,754,366 km (0.051 R)
• M71: 34,061,790 km (0.1 R)
• M72: 34,246,693 km (0.1 R)
• M73: 36,428,577 km (0.095 R)
• M74: 37,440,906 km (0.1 R)
• M75: 38,078,343 km (0.1 R)
• M76: 38,334,305 km (0.12 R)
• M77: 38,462,510 km (0.087 R)
• M78: 38,655,043 km (0.116 R)
• M79: 39,363,837 km (0.053 R)
• M80: 40,012,045 km (0.076 R)
• M81: 40,142,045 km (0.043 R)
• M82: 40,794,442 km (0.109 R)
• M83: 41,977,462 km (0.074 R)
• M84: 42,905,417 km (0.119 R)
• M85: 43,372,013 km (0.11 R)
• M86: 43,505,604 km (0.059 R)
• M87: 43,706,215 km (0.078 R)
• M88: 44,781,674 km (0.066 R)
• M89: 45,322,620 km (0.118 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: 182 - 13,401 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit