🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.93 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.31

Radius: 1.79

Gravity: 1.35 G

Time & Orbit

Eccentricity (e): 0.087

Orbit Range: 0.85 AU - 1.01 AU

Year: 338 Days

Day: 12.6 Hours

Environment

Temp: 35 °C

Axial Tilt: 32.3 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 2 - Terrestrial

Semi-Major Axis: 1.27 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.79

Radius: 1.87

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.084

Orbit Range: 1.16 AU - 1.38 AU

Year: 539 Days

Day: 35.5 Hours

Environment

Temp: -29 °C

Axial Tilt: 41.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 63,761,676 km

• M1: 1,270,385 km (0.076 R)

Planet 3 - Terrestrial

Semi-Major Axis: 2.58 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.73

Radius: 0.88

Gravity: 0.94 G

Time & Orbit

Eccentricity (e): 0.192

Orbit Range: 2.08 AU - 3.08 AU

Year: 1561 Days

Day: 18 Hours

Environment

Temp: -101 °C

Axial Tilt: 5.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 3.13 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.03

Radius: 1.33

Gravity: 1.15 G

Time & Orbit

Eccentricity (e): 0.047

Orbit Range: 2.98 AU - 3.28 AU

Year: 2086 Days

Day: 44.5 Hours

Environment

Temp: -111 °C

Axial Tilt: 26.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 63,761,676 km

• M1: 974,481 km (0.119 R)

Asteroid Belt

Center: 3.81 AU

Composition

Type: Inner System (Rocky)

A dense region of planetesimals and debris.

Boundary

Planet 5 - Gas Giant

Semi-Major Axis: 4.49 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 222.4

Radius: 11.8

Gravity: 1.6 G

Time & Orbit

Eccentricity (e): 0.104

Orbit Range: 4.02 AU - 4.96 AU

Year: 3584 Days

Day: 13 Hours

Environment

Temp: -146 °C

Axial Tilt: 11 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 63,761,676 km

• M1: 171,140 km (0.097 R)
• M2: 264,040 km (0.117 R)
• M3: 376,837 km (0.098 R)
• M4: 519,553 km (0.107 R)
• M5: 806,183 km (0.08 R)
• M6: 1,181,524 km (0.051 R)
• M7: 1,261,110 km (0.096 R)
• M8: 1,489,845 km (0.075 R)
• M9: 1,743,713 km (0.12 R)
• M10: 1,881,792 km (0.049 R)
• M11: 3,087,401 km (0.105 R)
• M12: 3,427,586 km (0.096 R)
• M13: 3,572,996 km (0.079 R)
• M14: 3,720,499 km (0.09 R)
• M15: 4,067,417 km (0.09 R)
• M16: 4,409,098 km (0.086 R)
• M17: 4,567,522 km (0.111 R)
• M18: 4,939,273 km (0.089 R)
• M19: 5,523,602 km (0.086 R)
• M20: 5,798,114 km (0.097 R)
• M21: 6,775,886 km (0.115 R)
• M22: 6,885,691 km (0.112 R)
• M23: 7,162,746 km (0.114 R)
• M24: 7,746,926 km (0.115 R)
• M25: 7,957,859 km (0.085 R)
• M26: 8,229,229 km (0.099 R)
• M27: 8,405,306 km (0.056 R)
• M28: 9,817,061 km (0.025 R)
• M29: 10,149,916 km (0.104 R)
• M30: 10,423,232 km (0.119 R)
• M31: 11,084,753 km (0.087 R)
• M32: 11,171,071 km (0.086 R)
• M33: 11,366,297 km (0.09 R)
• M34: 11,825,861 km (0.116 R)
• M35: 12,069,107 km (0.114 R)
• M36: 12,224,839 km (0.082 R)
• M37: 12,650,594 km (0.076 R)
• M38: 12,899,525 km (0.079 R)
• M39: 13,540,103 km (0.076 R)
• M40: 13,817,757 km (0.117 R)
• M41: 14,520,418 km (0.074 R)
• M42: 14,709,809 km (0.073 R)
• M43: 15,451,216 km (0.065 R)
• M44: 16,302,877 km (0.054 R)
• M45: 16,401,163 km (0.109 R)
• M46: 16,623,166 km (0.083 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 943.1

Radius: 9.7

Gravity: 10.02 G

Time & Orbit

Eccentricity (e): 0.081

Orbit Range: 5.59 AU - 6.57 AU

Year: 5648 Days

Day: 13.4 Hours

Environment

Temp: -153 °C

Axial Tilt: 11.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 63,761,676 km

• M1: 180,714 km (0.105 R)
• M2: 290,818 km (0.064 R)
• M3: 400,324 km (0.07 R)
• M4: 793,168 km (0.084 R)
• M5: 1,117,496 km (0.09 R)
• M6: 1,463,516 km (0.106 R)
• M7: 1,630,168 km (0.085 R)
• M8: 1,803,103 km (0.074 R)
• M9: 1,961,976 km (0.114 R)
• M10: 2,358,111 km (0.029 R)
• M11: 2,444,728 km (0.07 R)
• M12: 2,554,533 km (0.074 R)
• M13: 2,621,104 km (0.104 R)
• M14: 3,033,695 km (0.062 R)
• M15: 4,524,288 km (0.089 R)
• M16: 4,907,109 km (0.088 R)
• M17: 5,328,975 km (0.076 R)
• M18: 5,850,474 km (0.104 R)
• M19: 5,998,276 km (0.098 R)
• M20: 6,663,388 km (0.09 R)
• M21: 6,786,807 km (0.058 R)
• M22: 7,035,887 km (0.06 R)
• M23: 7,511,309 km (0.034 R)
• M24: 7,866,604 km (0.104 R)
• M25: 7,964,441 km (0.098 R)
• M26: 8,062,577 km (0.088 R)
• M27: 8,964,952 km (0.059 R)
• M28: 9,135,643 km (0.115 R)
• M29: 9,445,460 km (0.098 R)
• M30: 9,514,873 km (0.041 R)
• M31: 9,899,190 km (0.117 R)
• M32: 9,969,651 km (0.093 R)
• M33: 11,933,721 km (0.069 R)
• M34: 12,196,864 km (0.09 R)
• M35: 13,229,987 km (0.059 R)
• M36: 14,171,705 km (0.087 R)
• M37: 14,570,533 km (0.087 R)
• M38: 14,811,685 km (0.088 R)
• M39: 15,501,780 km (0.104 R)
• M40: 15,789,008 km (0.104 R)
• M41: 16,036,593 km (0.098 R)
• M42: 16,577,538 km (0.039 R)
• M43: 17,762,802 km (0.099 R)
• M44: 17,934,391 km (0.103 R)
• M45: 18,020,410 km (0.108 R)
• M46: 18,495,832 km (0.097 R)
• M47: 18,800,413 km (0.079 R)
• M48: 19,019,125 km (0.085 R)
• M49: 19,724,479 km (0.079 R)
• M50: 20,214,263 km (0.111 R)
• M51: 21,160,768 km (0.086 R)
• M52: 21,479,412 km (0.11 R)
• M53: 22,956,392 km (0.074 R)
• M54: 23,283,712 km (0.076 R)
• M55: 23,518,580 km (0.09 R)
• M56: 24,132,829 km (0.099 R)
• M57: 24,896,078 km (0.094 R)
• M58: 25,136,332 km (0.075 R)
• M59: 25,377,184 km (0.117 R)
• M60: 25,522,145 km (0.109 R)
• M61: 25,618,935 km (0.082 R)
• M62: 25,764,344 km (0.079 R)
• M63: 26,055,910 km (0.106 R)
• M64: 26,937,191 km (0.059 R)
• M65: 27,035,776 km (0.089 R)
• M66: 27,480,530 km (0.119 R)
• M67: 27,728,863 km (0.071 R)
• M68: 28,027,610 km (0.033 R)
• M69: 28,177,357 km (0.101 R)
• M70: 28,477,899 km (0.099 R)
• M71: 28,628,545 km (0.111 R)
• M72: 28,779,339 km (0.103 R)
• M73: 29,842,980 km (0.067 R)
• M74: 31,436,347 km (0.089 R)
• M75: 32,112,829 km (0.079 R)
• M76: 33,057,240 km (0.091 R)
• M77: 33,745,091 km (0.07 R)
• M78: 33,904,562 km (0.103 R)
• M79: 34,064,183 km (0.1 R)
• M80: 34,224,103 km (0.064 R)
• M81: 34,651,654 km (0.046 R)
• M82: 35,081,000 km (0.06 R)
• M83: 35,350,276 km (0.115 R)
• M84: 35,674,305 km (0.119 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.74 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 826.2

Radius: 13

Gravity: 4.89 G

Time & Orbit

Eccentricity (e): 0.215

Orbit Range: 5.29 AU - 8.19 AU

Year: 6592 Days

Day: 8.9 Hours

Environment

Temp: -153 °C

Axial Tilt: 177 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 63,761,676 km

• M1: 167,998 km (0.065 R)
• M2: 254,616 km (0.111 R)
• M3: 361,578 km (0.111 R)
• M4: 685,457 km (0.111 R)
• M5: 859,141 km (0.089 R)
• M6: 1,048,831 km (0.077 R)
• M7: 1,270,834 km (0.114 R)
• M8: 1,396,945 km (0.08 R)
• M9: 1,701,825 km (0.094 R)
• M10: 2,070,584 km (0.086 R)
• M11: 2,156,005 km (0.092 R)
• M12: 2,442,335 km (0.116 R)
• M13: 3,003,177 km (0.041 R)
• M14: 3,149,783 km (0.054 R)
• M15: 3,273,800 km (0.089 R)
• M16: 3,812,502 km (0.074 R)
• M17: 3,944,896 km (0.08 R)
• M18: 4,105,863 km (0.056 R)
• M19: 4,601,930 km (0.096 R)
• M20: 4,972,334 km (0.109 R)
• M21: 5,088,123 km (0.109 R)
• M22: 5,322,692 km (0.105 R)
• M23: 6,296,574 km (0.118 R)
• M24: 6,453,802 km (0.037 R)
• M25: 6,965,576 km (0.069 R)
• M26: 7,193,563 km (0.104 R)
• M27: 7,457,304 km (0.068 R)
• M28: 7,590,297 km (0.098 R)
• M29: 7,690,527 km (0.057 R)
• M30: 7,994,211 km (0.076 R)
• M31: 8,130,495 km (0.079 R)
• M32: 8,717,966 km (0.095 R)
• M33: 10,044,001 km (0.11 R)
• M34: 10,228,006 km (0.071 R)
• M35: 10,824,453 km (0.079 R)
• M36: 11,317,378 km (0.069 R)
• M37: 11,973,215 km (0.04 R)
• M38: 12,364,713 km (0.051 R)
• M39: 12,601,676 km (0.067 R)
• M40: 13,039,998 km (0.09 R)
• M41: 13,160,424 km (0.063 R)
• M42: 13,321,541 km (0.113 R)
• M43: 14,592,524 km (0.118 R)
• M44: 15,010,800 km (0.098 R)
• M45: 15,263,770 km (0.069 R)
• M46: 15,816,384 km (0.112 R)
• M47: 16,332,497 km (0.106 R)
• M48: 17,913,747 km (0.034 R)
• M49: 18,587,087 km (0.106 R)
• M50: 20,796,647 km (0.073 R)
• M51: 21,267,432 km (0.077 R)
• M52: 21,932,394 km (0.052 R)
• M53: 24,214,360 km (0.115 R)
• M54: 25,208,288 km (0.093 R)
• M55: 25,408,600 km (0.03 R)
• M56: 25,911,847 km (0.067 R)
• M57: 26,114,104 km (0.092 R)
• M58: 26,418,386 km (0.04 R)
• M59: 26,928,215 km (0.085 R)
• M60: 27,184,327 km (0.033 R)
• M61: 28,895,128 km (0.119 R)
• M62: 29,157,373 km (0.089 R)
• M63: 29,420,366 km (0.034 R)
• M64: 29,790,022 km (0.077 R)
• M65: 31,229,902 km (0.104 R)
• M66: 32,256,742 km (0.088 R)
• M67: 32,583,314 km (0.112 R)
• M68: 33,790,120 km (0.069 R)
• M69: 34,621,435 km (0.082 R)
• M70: 35,235,235 km (0.114 R)
• M71: 35,571,681 km (0.113 R)
• M72: 36,191,016 km (0.099 R)
• M73: 36,417,208 km (0.11 R)
• M74: 36,530,454 km (0.097 R)
• M75: 36,813,942 km (0.109 R)
• M76: 37,898,377 km (0.032 R)
• M77: 38,070,564 km (0.091 R)
• M78: 38,300,496 km (0.093 R)

Planet 8 - Ice Giant

Semi-Major Axis: 13.12 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 657.9

Radius: 4.5

Gravity: 32.49 G

Time & Orbit

Eccentricity (e): 0.243

Orbit Range: 9.93 AU - 16.31 AU

Year: 17903 Days

Day: 17 Hours

Environment

Temp: -190 °C

Axial Tilt: 35.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 63,761,676 km

• M1: 136,284 km (0.097 R)
• M2: 224,247 km (0.101 R)
• M3: 252,970 km (0.04 R)
• M4: 417,976 km (0.096 R)
• M5: 1,004,101 km (0.095 R)
• M6: 1,157,738 km (0.114 R)
• M7: 1,691,952 km (0.07 R)
• M8: 1,905,877 km (0.037 R)
• M9: 2,096,016 km (0.092 R)
• M10: 2,563,210 km (0.046 R)
• M11: 2,808,550 km (0.06 R)
• M12: 3,098,172 km (0.103 R)
• M13: 3,666,644 km (0.066 R)
• M14: 3,902,859 km (0.097 R)
• M15: 4,348,810 km (0.104 R)
• M16: 5,288,285 km (0.059 R)
• M17: 5,555,018 km (0.115 R)
• M18: 5,963,420 km (0.099 R)
• M19: 6,760,777 km (0.085 R)
• M20: 7,591,194 km (0.117 R)
• M21: 8,401,716 km (0.074 R)
• M22: 9,080,441 km (0.088 R)
• M23: 9,614,356 km (0.093 R)
• M24: 9,830,674 km (0.062 R)
• M25: 12,023,330 km (0.097 R)
• M26: 13,686,260 km (0.088 R)
• M27: 13,746,997 km (0.076 R)
• M28: 14,113,063 km (0.058 R)
• M29: 14,359,002 km (0.119 R)
• M30: 16,055,442 km (0.119 R)
• M31: 16,247,825 km (0.063 R)
• M32: 16,440,956 km (0.057 R)
• M33: 17,090,210 km (0.096 R)
• M34: 17,880,386 km (0.058 R)
• M35: 18,146,521 km (0.113 R)
• M36: 19,838,622 km (0.108 R)
• M37: 20,252,261 km (0.095 R)
• M38: 20,738,304 km (0.092 R)
• M39: 20,877,879 km (0.118 R)
• M40: 21,087,765 km (0.085 R)
• M41: 22,433,846 km (0.036 R)
• M42: 24,910,888 km (0.116 R)
• M43: 25,580,937 km (0.111 R)
• M44: 27,014,832 km (0.119 R)
• M45: 27,549,645 km (0.05 R)
• M46: 28,242,432 km (0.103 R)
• M47: 28,397,117 km (0.087 R)
• M48: 28,785,173 km (0.052 R)
• M49: 28,862,964 km (0.108 R)
• M50: 29,488,134 km (0.115 R)
• M51: 29,802,289 km (0.07 R)
• M52: 30,434,041 km (0.113 R)
• M53: 33,167,942 km (0.06 R)
• M54: 34,978,226 km (0.093 R)
• M55: 35,477,584 km (0.049 R)
• M56: 35,644,535 km (0.071 R)
• M57: 36,314,883 km (0.056 R)
• M58: 36,567,404 km (0.114 R)
• M59: 36,651,778 km (0.063 R)
• M60: 38,179,920 km (0.054 R)
• M61: 38,608,218 km (0.09 R)
• M62: 39,124,032 km (0.111 R)
• M63: 39,728,856 km (0.069 R)
• M64: 40,772,900 km (0.117 R)
• M65: 41,386,101 km (0.044 R)
• M66: 42,002,295 km (0.025 R)
• M67: 43,243,808 km (0.083 R)
• M68: 43,422,128 km (0.102 R)
• M69: 43,690,058 km (0.069 R)
• M70: 44,587,197 km (0.045 R)
• M71: 45,038,085 km (0.064 R)
• M72: 45,944,348 km (0.069 R)
• M73: 47,131,557 km (0.097 R)
• M74: 47,406,817 km (0.065 R)
• M75: 48,606,443 km (0.101 R)
• M76: 48,699,044 km (0.109 R)
• M77: 48,791,794 km (0.081 R)
• M78: 50,377,382 km (0.104 R)
• M79: 52,549,394 km (0.064 R)
• M80: 52,930,270 km (0.072 R)
• M81: 53,982,242 km (0.063 R)
• M82: 56,204,219 km (0.073 R)
• M83: 56,398,846 km (0.075 R)
• M84: 59,146,959 km (0.071 R)
• M85: 60,936,449 km (0.108 R)
• M86: 61,637,165 km (0.113 R)
• M87: 62,441,403 km (0.12 R)
• M88: 62,743,741 km (0.088 R)
• M89: 63,451,338 km (0.066 R)
• M90: 65,487,515 km (0.061 R)
• M91: 65,692,315 km (0.105 R)
• M92: 66,205,286 km (0.115 R)
• M93: 67,338,340 km (0.083 R)

Planet 9 - Ice Giant

Semi-Major Axis: 13.96 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 417.6

Radius: 5.1

Gravity: 16.06 G

Time & Orbit

Eccentricity (e): 0.226

Orbit Range: 10.81 AU - 17.11 AU

Year: 19650 Days

Day: 16 Hours

Environment

Temp: -192 °C

Axial Tilt: 31.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 63,761,676 km

• M1: 65,374 km (0.119 R)
• M2: 157,826 km (0.116 R)
• M3: 217,216 km (0.1 R)
• M4: 378,034 km (0.047 R)
• M5: 631,453 km (0.055 R)
• M6: 818,749 km (0.084 R)
• M7: 1,143,526 km (0.066 R)
• M8: 1,217,876 km (0.097 R)
• M9: 1,397,992 km (0.108 R)
• M10: 1,783,207 km (0.063 R)
• M11: 1,869,973 km (0.068 R)
• M12: 2,844,753 km (0.093 R)
• M13: 3,083,661 km (0.039 R)
• M14: 3,258,242 km (0.038 R)
• M15: 4,063,976 km (0.117 R)
• M16: 4,255,311 km (0.105 R)
• M17: 4,332,654 km (0.114 R)
• M18: 4,371,549 km (0.103 R)
• M19: 4,646,959 km (0.084 R)
• M20: 5,214,383 km (0.099 R)
• M21: 5,422,324 km (0.074 R)
• M22: 5,464,361 km (0.062 R)
• M23: 5,633,108 km (0.083 R)
• M24: 6,547,001 km (0.073 R)
• M25: 6,591,581 km (0.072 R)
• M26: 6,816,427 km (0.11 R)
• M27: 6,861,755 km (0.096 R)
• M28: 6,952,561 km (0.084 R)
• M29: 7,319,973 km (0.105 R)
• M30: 7,646,546 km (0.11 R)
• M31: 8,410,991 km (0.104 R)
• M32: 9,400,132 km (0.064 R)
• M33: 9,908,465 km (0.048 R)
• M34: 10,062,701 km (0.088 R)
• M35: 10,321,505 km (0.115 R)
• M36: 10,373,565 km (0.104 R)
• M37: 11,919,809 km (0.083 R)
• M38: 12,083,918 km (0.069 R)
• M39: 12,747,534 km (0.112 R)
• M40: 12,971,332 km (0.095 R)
• M41: 13,196,477 km (0.083 R)
• M42: 13,879,541 km (0.104 R)
• M43: 16,786,078 km (0.112 R)
• M44: 17,216,022 km (0.065 R)
• M45: 18,087,131 km (0.091 R)
• M46: 18,527,995 km (0.092 R)
• M47: 18,844,993 km (0.107 R)
• M48: 19,100,058 km (0.082 R)
• M49: 20,261,386 km (0.112 R)
• M50: 20,784,829 km (0.112 R)
• M51: 23,399,800 km (0.037 R)
• M52: 23,948,824 km (0.119 R)
• M53: 24,017,789 km (0.107 R)
• M54: 24,294,096 km (0.099 R)
• M55: 24,989,726 km (0.039 R)
• M56: 25,691,938 km (0.068 R)
• M57: 25,833,009 km (0.08 R)
• M58: 26,045,288 km (0.073 R)
• M59: 29,298,444 km (0.074 R)
• M60: 29,593,750 km (0.074 R)
• M61: 31,763,966 km (0.079 R)
• M62: 31,839,663 km (0.093 R)
• M63: 32,295,488 km (0.106 R)
• M64: 32,983,189 km (0.096 R)
• M65: 33,059,933 km (0.099 R)
• M66: 33,367,356 km (0.115 R)
• M67: 34,295,162 km (0.098 R)
• M68: 34,762,356 km (0.101 R)
• M69: 35,153,256 km (0.115 R)
• M70: 36,810,950 km (0.074 R)
• M71: 37,129,444 km (0.03 R)
• M72: 37,289,214 km (0.065 R)
• M73: 39,141,535 km (0.104 R)
• M74: 39,792,734 km (0.118 R)
• M75: 39,874,415 km (0.092 R)
• M76: 41,519,393 km (0.077 R)
• M77: 43,018,812 km (0.099 R)
• M78: 43,690,806 km (0.117 R)
• M79: 44,960,144 km (0.105 R)
• M80: 46,413,487 km (0.075 R)
• M81: 48,404,037 km (0.115 R)
• M82: 48,840,563 km (0.115 R)
• M83: 50,953,334 km (0.053 R)
• M84: 51,308,479 km (0.102 R)
• M85: 54,178,215 km (0.069 R)
• M86: 55,450,096 km (0.114 R)
• M87: 55,632,606 km (0.085 R)
• M88: 55,906,669 km (0.101 R)
• M89: 55,998,223 km (0.103 R)
• M90: 58,023,030 km (0.117 R)
• M91: 59,417,432 km (0.084 R)
• M92: 61,010,948 km (0.114 R)
• M93: 61,199,442 km (0.062 R)
• M94: 62,713,522 km (0.087 R)
• M95: 63,189,243 km (0.11 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 408 - 15,434 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit