🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.27

Radius: 1.79

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.219

Orbit Range: 0.47 AU - 0.73 AU

Year: 170 Days

Day: 23.9 Hours

Environment

Temp: 191 °C

Axial Tilt: 38.2 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.9 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.79

Radius: 1.7

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.246

Orbit Range: 0.68 AU - 1.12 AU

Year: 312 Days

Day: 42.6 Hours

Environment

Temp: 149 °C

Axial Tilt: 13.6 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 3 - Terrestrial

Semi-Major Axis: 2.62 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.48

Radius: 0.75

Gravity: 0.85 G

Time & Orbit

Eccentricity (e): 0.015

Orbit Range: 2.58 AU - 2.66 AU

Year: 1549 Days

Day: 42 Hours

Environment

Temp: -91 °C

Axial Tilt: 21.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 2.76 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.41

Radius: 1.15

Gravity: 1.07 G

Time & Orbit

Eccentricity (e): 0.018

Orbit Range: 2.71 AU - 2.81 AU

Year: 1675 Days

Day: 15.8 Hours

Environment

Temp: -95 °C

Axial Tilt: 5.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 98,000,559 km

• M1: 186,399 km (0.086 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.26 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 451.9

Radius: 8.4

Gravity: 6.4 G

Time & Orbit

Eccentricity (e): 0.182

Orbit Range: 4.3 AU - 6.22 AU

Year: 4406 Days

Day: 6.4 Hours

Environment

Temp: -133 °C

Axial Tilt: 8.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 98,000,559 km

• M1: 136,134 km (0.053 R)
• M2: 242,199 km (0.115 R)
• M3: 349,610 km (0.104 R)
• M4: 423,212 km (0.111 R)
• M5: 775,815 km (0.102 R)
• M6: 899,682 km (0.112 R)
• M7: 1,030,430 km (0.11 R)
• M8: 1,297,762 km (0.078 R)
• M9: 1,405,322 km (0.118 R)
• M10: 1,600,996 km (0.075 R)
• M11: 1,790,687 km (0.079 R)
• M12: 1,880,744 km (0.081 R)
• M13: 2,065,498 km (0.11 R)
• M14: 2,128,479 km (0.114 R)
• M15: 2,192,058 km (0.109 R)
• M16: 2,337,467 km (0.04 R)
• M17: 2,486,017 km (0.07 R)
• M18: 3,093,684 km (0.089 R)
• M19: 3,573,744 km (0.108 R)
• M20: 3,842,122 km (0.061 R)
• M21: 4,418,523 km (0.113 R)
• M22: 5,022,001 km (0.068 R)
• M23: 5,192,991 km (0.11 R)
• M24: 5,409,459 km (0.101 R)
• M25: 5,496,974 km (0.11 R)
• M26: 5,918,690 km (0.04 R)
• M27: 6,099,554 km (0.06 R)
• M28: 6,190,509 km (0.057 R)
• M29: 6,397,104 km (0.04 R)
• M30: 6,559,418 km (0.117 R)
• M31: 6,982,780 km (0.071 R)
• M32: 7,125,945 km (0.089 R)
• M33: 7,585,659 km (0.113 R)
• M34: 7,831,449 km (0.08 R)
• M35: 7,905,649 km (0.069 R)
• M36: 7,980,149 km (0.075 R)
• M37: 8,918,127 km (0.028 R)
• M38: 9,021,500 km (0.117 R)
• M39: 9,177,530 km (0.032 R)
• M40: 9,386,967 km (0.115 R)
• M41: 9,944,070 km (0.094 R)
• M42: 9,997,626 km (0.053 R)
• M43: 10,186,119 km (0.045 R)
• M44: 10,786,006 km (0.098 R)
• M45: 10,979,287 km (0.113 R)
• M46: 11,145,789 km (0.076 R)
• M47: 11,934,320 km (0.1 R)
• M48: 12,019,890 km (0.074 R)
• M49: 12,105,609 km (0.084 R)
• M50: 13,297,904 km (0.113 R)
• M51: 13,683,867 km (0.102 R)
• M52: 14,043,201 km (0.116 R)
• M53: 14,771,443 km (0.119 R)
• M54: 15,667,684 km (0.093 R)
• M55: 15,824,014 km (0.095 R)
• M56: 15,949,527 km (0.118 R)
• M57: 16,932,684 km (0.096 R)
• M58: 17,060,889 km (0.094 R)
• M59: 17,609,764 km (0.104 R)
• M60: 18,197,235 km (0.043 R)
• M61: 18,427,466 km (0.038 R)
• M62: 18,592,472 km (0.089 R)
• M63: 19,290,945 km (0.09 R)
• M64: 19,391,474 km (0.09 R)
• M65: 20,508,222 km (0.099 R)
• M66: 21,264,290 km (0.082 R)
• M67: 21,715,328 km (0.101 R)
• M68: 21,819,897 km (0.108 R)
• M69: 22,556,367 km (0.038 R)
• M70: 23,122,894 km (0.089 R)
• M71: 23,229,707 km (0.096 R)
• M72: 23,443,782 km (0.09 R)
• M73: 24,017,639 km (0.119 R)

Planet 6 - Gas Giant

Semi-Major Axis: 8.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 109.8

Radius: 14.7

Gravity: 0.51 G

Time & Orbit

Eccentricity (e): 0.098

Orbit Range: 7.89 AU - 9.61 AU

Year: 9454 Days

Day: 6 Hours

Environment

Temp: -171 °C

Axial Tilt: 38.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 98,000,559 km

• M1: 194,328 km (0.101 R)
• M2: 287,228 km (0.078 R)
• M3: 866,321 km (0.072 R)
• M4: 1,179,280 km (0.104 R)
• M5: 1,417,739 km (0.118 R)
• M6: 1,658,292 km (0.097 R)
• M7: 2,084,198 km (0.111 R)
• M8: 2,196,246 km (0.115 R)
• M9: 3,183,742 km (0.089 R)
• M10: 3,407,690 km (0.101 R)
• M11: 3,502,685 km (0.107 R)
• M12: 3,637,173 km (0.116 R)
• M13: 4,172,135 km (0.116 R)
• M14: 4,294,356 km (0.104 R)
• M15: 4,438,718 km (0.04 R)
• M16: 4,817,201 km (0.099 R)
• M17: 5,560,702 km (0.098 R)
• M18: 5,900,290 km (0.063 R)
• M19: 5,992,143 km (0.094 R)
• M20: 6,363,744 km (0.095 R)
• M21: 6,767,060 km (0.097 R)
• M22: 7,056,831 km (0.108 R)
• M23: 7,301,423 km (0.031 R)
• M24: 8,359,379 km (0.11 R)
• M25: 8,853,800 km (0.054 R)
• M26: 9,411,352 km (0.116 R)
• M27: 9,653,850 km (0.072 R)
• M28: 9,843,989 km (0.113 R)
• M29: 10,560,862 km (0.108 R)
• M30: 10,700,586 km (0.089 R)
• M31: 10,812,934 km (0.05 R)
• M32: 10,953,855 km (0.098 R)
• M33: 11,408,932 km (0.07 R)
• M34: 11,870,142 km (0.034 R)
• M35: 13,290,724 km (0.071 R)
• M36: 13,806,687 km (0.057 R)
• M37: 14,113,362 km (0.074 R)
• M38: 14,546,299 km (0.03 R)
• M39: 14,858,360 km (0.117 R)
• M40: 15,235,795 km (0.117 R)
• M41: 15,393,920 km (0.077 R)
• M42: 15,679,951 km (0.101 R)
• M43: 15,775,694 km (0.066 R)
• M44: 16,032,105 km (0.109 R)
• M45: 16,128,595 km (0.115 R)
• M46: 17,005,538 km (0.105 R)
• M47: 17,665,265 km (0.118 R)
• M48: 18,065,140 km (0.075 R)
• M49: 18,535,326 km (0.033 R)
• M50: 18,805,948 km (0.075 R)
• M51: 19,077,768 km (0.072 R)
• M52: 20,213,066 km (0.103 R)
• M53: 20,491,617 km (0.064 R)
• M54: 20,701,353 km (0.095 R)
• M55: 21,405,511 km (0.092 R)
• M56: 21,582,784 km (0.078 R)
• M57: 21,760,656 km (0.073 R)
• M58: 24,670,933 km (0.054 R)

Planet 7 - Gas Giant

Semi-Major Axis: 9.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 803.2

Radius: 11.1

Gravity: 6.52 G

Time & Orbit

Eccentricity (e): 0.168

Orbit Range: 7.55 AU - 10.61 AU

Year: 9994 Days

Day: 6 Hours

Environment

Temp: -178 °C

Axial Tilt: 23.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 98,000,559 km

• M1: 204,201 km (0.049 R)
• M2: 349,311 km (0.053 R)
• M3: 684,560 km (0.064 R)
• M4: 1,051,224 km (0.085 R)
• M5: 1,152,352 km (0.106 R)
• M6: 1,342,790 km (0.076 R)
• M7: 1,453,343 km (0.107 R)
• M8: 1,683,874 km (0.107 R)
• M9: 2,051,884 km (0.043 R)
• M10: 2,180,389 km (0.119 R)
• M11: 2,527,007 km (0.108 R)
• M12: 2,777,434 km (0.074 R)
• M13: 2,862,705 km (0.08 R)
• M14: 3,242,534 km (0.099 R)
• M15: 3,607,553 km (0.065 R)
• M16: 4,082,376 km (0.114 R)
• M17: 4,577,246 km (0.072 R)
• M18: 5,196,132 km (0.094 R)
• M19: 6,856,370 km (0.028 R)
• M20: 6,972,607 km (0.057 R)
• M21: 8,129,148 km (0.082 R)
• M22: 8,625,065 km (0.118 R)
• M23: 8,834,502 km (0.071 R)
• M24: 9,130,706 km (0.063 R)
• M25: 9,430,201 km (0.108 R)
• M26: 9,951,250 km (0.064 R)
• M27: 10,171,159 km (0.078 R)
• M28: 11,431,820 km (0.109 R)
• M29: 13,124,371 km (0.03 R)
• M30: 14,345,089 km (0.082 R)
• M31: 15,044,609 km (0.066 R)
• M32: 15,653,024 km (0.09 R)
• M33: 16,684,800 km (0.089 R)
• M34: 17,051,165 km (0.11 R)
• M35: 17,473,031 km (0.117 R)
• M36: 18,542,955 km (0.09 R)
• M37: 19,414,064 km (0.074 R)
• M38: 19,523,869 km (0.036 R)
• M39: 20,131,685 km (0.116 R)
• M40: 20,689,685 km (0.113 R)
• M41: 21,196,223 km (0.062 R)
• M42: 21,935,087 km (0.099 R)
• M43: 23,262,768 km (0.118 R)
• M44: 23,437,947 km (0.057 R)
• M45: 23,848,294 km (0.084 R)
• M46: 24,854,639 km (0.083 R)
• M47: 26,056,209 km (0.119 R)
• M48: 26,969,803 km (0.12 R)
• M49: 27,215,293 km (0.097 R)
• M50: 27,399,897 km (0.109 R)
• M51: 27,955,952 km (0.063 R)
• M52: 28,204,285 km (0.051 R)
• M53: 28,828,557 km (0.074 R)
• M54: 30,345,030 km (0.066 R)
• M55: 31,048,739 km (0.089 R)
• M56: 31,757,833 km (0.077 R)
• M57: 32,146,787 km (0.098 R)
• M58: 32,537,387 km (0.112 R)
• M59: 34,647,166 km (0.059 R)
• M60: 35,853,224 km (0.069 R)
• M61: 38,858,945 km (0.113 R)
• M62: 39,066,736 km (0.092 R)
• M63: 39,483,665 km (0.098 R)
• M64: 40,251,701 km (0.092 R)
• M65: 40,672,669 km (0.034 R)
• M66: 41,731,672 km (0.09 R)
• M67: 42,086,668 km (0.092 R)
• M68: 43,804,501 km (0.086 R)
• M69: 44,020,819 km (0.112 R)
• M70: 44,165,331 km (0.102 R)
• M71: 44,237,586 km (0.091 R)
• M72: 44,744,574 km (0.098 R)
• M73: 45,399,363 km (0.068 R)
• M74: 45,545,221 km (0.058 R)
• M75: 46,718,218 km (0.093 R)
• M76: 47,678,637 km (0.113 R)
• M77: 47,827,038 km (0.078 R)
• M78: 47,901,238 km (0.074 R)
• M79: 48,645,637 km (0.077 R)
• M80: 49,543,823 km (0.088 R)
• M81: 49,844,515 km (0.055 R)
• M82: 50,523,090 km (0.076 R)

Planet 8 - Ice Giant

Semi-Major Axis: 16.39 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 186.6

Radius: 7.6

Gravity: 3.23 G

Time & Orbit

Eccentricity (e): 0.24

Orbit Range: 12.46 AU - 20.32 AU

Year: 24236 Days

Day: 23.2 Hours

Environment

Temp: -199 °C

Axial Tilt: 37.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 98,000,559 km

• M1: 96,341 km (0.12 R)
• M2: 197,320 km (0.035 R)
• M3: 289,771 km (0.119 R)
• M4: 525,537 km (0.102 R)
• M5: 611,107 km (0.065 R)
• M6: 856,149 km (0.079 R)
• M7: 1,153,400 km (0.047 R)
• M8: 1,221,167 km (0.074 R)
• M9: 1,432,848 km (0.11 R)
• M10: 1,656,348 km (0.044 R)
• M11: 1,733,391 km (0.115 R)
• M12: 1,811,630 km (0.104 R)
• M13: 1,917,695 km (0.108 R)
• M14: 2,026,004 km (0.088 R)
• M15: 2,567,997 km (0.076 R)
• M16: 2,657,606 km (0.076 R)
• M17: 3,281,130 km (0.095 R)
• M18: 3,777,795 km (0.051 R)
• M19: 3,982,894 km (0.084 R)
• M20: 4,156,876 km (0.108 R)
• M21: 4,262,343 km (0.101 R)
• M22: 4,333,102 km (0.033 R)
• M23: 4,440,214 km (0.076 R)
• M24: 5,062,990 km (0.071 R)
• M25: 5,365,627 km (0.09 R)
• M26: 5,596,456 km (0.113 R)
• M27: 5,791,382 km (0.103 R)
• M28: 5,869,921 km (0.117 R)
• M29: 6,067,839 km (0.071 R)
• M30: 6,511,247 km (0.074 R)
• M31: 7,216,900 km (0.051 R)
• M32: 7,600,320 km (0.051 R)
• M33: 8,254,063 km (0.09 R)
• M34: 8,431,486 km (0.099 R)
• M35: 8,654,985 km (0.094 R)
• M36: 8,925,757 km (0.09 R)
• M37: 9,153,595 km (0.1 R)
• M38: 9,383,227 km (0.119 R)
• M39: 10,083,794 km (0.11 R)
• M40: 10,273,484 km (0.119 R)
• M41: 10,416,500 km (0.071 R)
• M42: 11,337,723 km (0.068 R)
• M43: 11,832,892 km (0.116 R)
• M44: 11,882,858 km (0.087 R)
• M45: 12,234,263 km (0.11 R)
• M46: 12,998,709 km (0.089 R)
• M47: 13,360,735 km (0.113 R)
• M48: 13,412,646 km (0.07 R)
• M49: 14,680,488 km (0.087 R)
• M50: 16,318,585 km (0.046 R)
• M51: 16,989,830 km (0.055 R)
• M52: 17,046,079 km (0.088 R)
• M53: 17,727,198 km (0.094 R)
• M54: 18,186,164 km (0.057 R)
• M55: 18,881,944 km (0.081 R)
• M56: 19,763,973 km (0.09 R)
• M57: 19,823,214 km (0.082 R)
• M58: 20,719,455 km (0.026 R)
• M59: 20,839,881 km (0.066 R)
• M60: 21,445,902 km (0.112 R)
• M61: 21,689,896 km (0.063 R)
• M62: 22,675,148 km (0.098 R)
• M63: 22,986,012 km (0.082 R)
• M64: 24,434,119 km (0.1 R)
• M65: 25,008,874 km (0.03 R)
• M66: 25,587,968 km (0.088 R)
• M67: 26,236,624 km (0.09 R)
• M68: 30,857,702 km (0.08 R)
• M69: 31,271,191 km (0.092 R)
• M70: 32,103,703 km (0.073 R)
• M71: 32,382,853 km (0.102 R)
• M72: 33,295,699 km (0.076 R)
• M73: 33,436,919 km (0.096 R)
• M74: 33,790,718 km (0.049 R)
• M75: 34,216,923 km (0.091 R)
• M76: 34,573,564 km (0.045 R)
• M77: 35,578,413 km (0.088 R)
• M78: 36,957,556 km (0.039 R)
• M79: 37,030,559 km (0.101 R)
• M80: 37,911,092 km (0.07 R)
• M81: 38,280,150 km (0.101 R)
• M82: 38,502,004 km (0.073 R)
• M83: 39,021,557 km (0.065 R)
• M84: 40,217,742 km (0.098 R)
• M85: 40,518,583 km (0.077 R)
• M86: 40,744,775 km (0.117 R)
• M87: 42,187,048 km (0.025 R)
• M88: 45,043,320 km (0.118 R)
• M89: 45,747,328 km (0.094 R)
• M90: 47,008,139 km (0.072 R)
• M91: 47,722,469 km (0.111 R)
• M92: 48,280,319 km (0.042 R)
• M93: 52,000,519 km (0.088 R)
• M94: 54,143,658 km (0.078 R)
• M95: 55,309,474 km (0.075 R)

Planet 9 - Ice Giant

Semi-Major Axis: 19.2 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 620

Radius: 5.9

Gravity: 17.81 G

Time & Orbit

Eccentricity (e): 0.197

Orbit Range: 15.42 AU - 22.98 AU

Year: 30729 Days

Day: 18.4 Hours

Environment

Temp: -209 °C

Axial Tilt: 13.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 98,000,559 km

• M1: 76,445 km (0.097 R)
• M2: 186,399 km (0.118 R)
• M3: 235,617 km (0.062 R)
• M4: 290,369 km (0.091 R)
• M5: 392,994 km (0.029 R)
• M6: 532,120 km (0.068 R)
• M7: 607,816 km (0.079 R)
• M8: 714,629 km (0.075 R)
• M9: 1,336,507 km (0.104 R)
• M10: 1,476,830 km (0.066 R)
• M11: 2,165,728 km (0.095 R)
• M12: 2,372,772 km (0.07 R)
• M13: 2,895,616 km (0.095 R)
• M14: 3,310,451 km (0.113 R)
• M15: 3,992,468 km (0.105 R)
• M16: 5,313,417 km (0.063 R)
• M17: 5,480,368 km (0.083 R)
• M18: 5,592,567 km (0.086 R)
• M19: 6,049,289 km (0.096 R)
• M20: 6,876,865 km (0.116 R)
• M21: 7,058,776 km (0.055 R)
• M22: 7,303,966 km (0.089 R)
• M23: 7,614,232 km (0.1 R)
• M24: 11,158,206 km (0.064 R)
• M25: 11,300,623 km (0.1 R)
• M26: 11,515,296 km (0.108 R)
• M27: 12,387,751 km (0.118 R)
• M28: 12,831,907 km (0.098 R)
• M29: 13,206,051 km (0.093 R)
• M30: 13,735,927 km (0.092 R)
• M31: 14,738,233 km (0.043 R)
• M32: 14,816,323 km (0.117 R)
• M33: 15,445,831 km (0.077 R)
• M34: 15,604,554 km (0.105 R)
• M35: 16,084,015 km (0.087 R)
• M36: 17,966,555 km (0.082 R)
• M37: 18,049,881 km (0.115 R)
• M38: 20,263,630 km (0.102 R)
• M39: 20,350,397 km (0.088 R)
• M40: 20,786,475 km (0.028 R)
• M41: 21,934,638 km (0.089 R)
• M42: 23,193,953 km (0.114 R)
• M43: 23,466,820 km (0.041 R)
• M44: 23,740,733 km (0.089 R)
• M45: 24,661,658 km (0.066 R)
• M46: 26,348,374 km (0.041 R)
• M47: 26,918,940 km (0.11 R)
• M48: 28,849,800 km (0.07 R)
• M49: 29,339,434 km (0.115 R)
• M50: 30,824,940 km (0.091 R)
• M51: 31,225,115 km (0.028 R)
• M52: 31,425,875 km (0.118 R)
• M53: 31,727,764 km (0.1 R)
• M54: 32,945,191 km (0.089 R)
• M55: 36,054,882 km (0.087 R)
• M56: 36,582,215 km (0.09 R)
• M57: 40,782,025 km (0.102 R)
• M58: 41,441,453 km (0.086 R)
• M59: 43,553,176 km (0.103 R)
• M60: 45,585,762 km (0.063 R)
• M61: 46,843,132 km (0.047 R)
• M62: 48,575,925 km (0.083 R)
• M63: 48,692,162 km (0.098 R)
• M64: 49,391,831 km (0.093 R)
• M65: 51,747,549 km (0.037 R)
• M66: 53,298,281 km (0.069 R)
• M67: 55,227,794 km (0.071 R)
• M68: 56,079,006 km (0.095 R)
• M69: 57,794,744 km (0.049 R)
• M70: 58,287,968 km (0.084 R)
• M71: 58,535,253 km (0.099 R)
• M72: 59,154,738 km (0.074 R)
• M73: 59,651,852 km (0.102 R)
• M74: 61,026,357 km (0.071 R)
• M75: 63,297,701 km (0.073 R)
• M76: 63,551,719 km (0.047 R)
• M77: 64,827,340 km (0.114 R)
• M78: 65,982,385 km (0.043 R)
• M79: 66,111,189 km (0.059 R)
• M80: 74,524,423 km (0.085 R)
• M81: 77,901,146 km (0.055 R)
• M82: 79,676,574 km (0.101 R)
• M83: 79,813,755 km (0.111 R)
• M84: 82,295,434 km (0.099 R)
• M85: 84,662,372 km (0.078 R)
• M86: 87,617,079 km (0.093 R)
• M87: 89,463,117 km (0.029 R)
• M88: 90,605,446 km (0.12 R)
• M89: 91,465,335 km (0.098 R)
• M90: 92,184,153 km (0.056 R)
• M91: 92,904,616 km (0.117 R)
• M92: 97,267,040 km (0.066 R)
• M93: 97,706,857 km (0.091 R)

Kuiper Belt

Range: 30 - 46 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 321 - 18,548 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit