🌌 Stone's Star System Generator

Asteroid Belt

Center: 1.04 AU

Composition

Type: Far Outer (Icy/Cometary)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 2.07 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 768.3

Radius: 10.7

Gravity: 6.71 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 2 AU - 2.14 AU

Year: 1986 Days

Day: 15 Hours

Environment

Temp: -209 °C

Axial Tilt: 18.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 36,855,984 km

• M1: 135,835 km (0.107 R)
• M2: 207,642 km (0.079 R)
• M3: 444,605 km (0.118 R)
• M4: 528,080 km (0.116 R)
• M5: 672,891 km (0.116 R)
• M6: 797,506 km (0.118 R)
• M7: 903,272 km (0.066 R)
• M8: 1,280,857 km (0.031 R)
• M9: 1,385,575 km (0.118 R)
• M10: 1,581,399 km (0.101 R)
• M11: 1,763,310 km (0.083 R)
• M12: 1,940,135 km (0.076 R)
• M13: 2,049,192 km (0.116 R)
• M14: 2,122,943 km (0.07 R)
• M15: 2,505,914 km (0.051 R)
• M16: 2,625,143 km (0.056 R)
• M17: 2,800,622 km (0.041 R)
• M18: 3,022,027 km (0.108 R)
• M19: 3,163,546 km (0.059 R)
• M20: 3,423,547 km (0.074 R)
• M21: 3,600,821 km (0.111 R)
• M22: 4,404,012 km (0.061 R)
• M23: 4,484,196 km (0.044 R)
• M24: 4,859,088 km (0.118 R)
• M25: 5,058,802 km (0.087 R)
• M26: 5,483,510 km (0.11 R)
• M27: 5,639,241 km (0.103 R)
• M28: 5,708,954 km (0.103 R)
• M29: 5,796,469 km (0.067 R)
• M30: 5,866,929 km (0.098 R)
• M31: 6,367,334 km (0.118 R)
• M32: 6,458,290 km (0.051 R)
• M33: 6,881,652 km (0.028 R)
• M34: 7,012,400 km (0.09 R)
• M35: 7,181,595 km (0.04 R)
• M36: 7,736,155 km (0.087 R)
• M37: 7,891,587 km (0.079 R)
• M38: 7,969,677 km (0.101 R)
• M39: 8,126,605 km (0.111 R)
• M40: 8,264,834 km (0.072 R)
• M41: 8,523,638 km (0.054 R)
• M42: 8,967,644 km (0.087 R)
• M43: 9,171,995 km (0.097 R)
• M44: 9,295,413 km (0.079 R)
• M45: 9,481,363 km (0.081 R)
• M46: 9,689,604 km (0.084 R)
• M47: 9,878,247 km (0.034 R)
• M48: 10,366,085 km (0.093 R)
• M49: 10,473,048 km (0.115 R)
• M50: 10,645,235 km (0.084 R)
• M51: 11,431,222 km (0.11 R)
• M52: 11,586,205 km (0.114 R)
• M53: 11,719,647 km (0.074 R)
• M54: 11,831,247 km (0.101 R)
• M55: 12,010,615 km (0.102 R)
• M56: 12,123,112 km (0.115 R)
• M57: 12,281,237 km (0.049 R)
• M58: 12,417,222 km (0.055 R)
• M59: 13,151,448 km (0.11 R)
• M60: 13,734,730 km (0.059 R)
• M61: 13,994,133 km (0.099 R)
• M62: 14,088,828 km (0.104 R)
• M63: 15,437,303 km (0.096 R)
• M64: 15,682,494 km (0.094 R)
• M65: 16,226,283 km (0.099 R)
• M66: 16,475,513 km (0.099 R)
• M67: 16,550,611 km (0.103 R)
• M68: 16,650,841 km (0.112 R)
• M69: 16,726,089 km (0.116 R)

Planet 2 - Gas Giant

Semi-Major Axis: 3.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 70.2

Radius: 10.8

Gravity: 0.6 G

Time & Orbit

Eccentricity (e): 0.139

Orbit Range: 3.07 AU - 4.05 AU

Year: 4479 Days

Day: 7.5 Hours

Environment

Temp: -219 °C

Axial Tilt: 36.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (39)

Outer Limit: 36,855,984 km

• M1: 149,299 km (0.096 R)
• M2: 283,937 km (0.116 R)
• M3: 485,295 km (0.11 R)
• M4: 674,537 km (0.104 R)
• M5: 750,533 km (0.044 R)
• M6: 851,960 km (0.104 R)
• M7: 1,053,319 km (0.062 R)
• M8: 1,193,791 km (0.117 R)
• M9: 1,349,522 km (0.092 R)
• M10: 1,503,010 km (0.06 R)
• M11: 2,259,377 km (0.103 R)
• M12: 2,432,162 km (0.068 R)
• M13: 2,665,684 km (0.071 R)
• M14: 2,930,024 km (0.074 R)
• M15: 3,484,284 km (0.116 R)
• M16: 3,824,769 km (0.115 R)
• M17: 3,927,692 km (0.069 R)
• M18: 4,202,503 km (0.12 R)
• M19: 4,715,774 km (0.109 R)
• M20: 4,881,977 km (0.113 R)
• M21: 5,654,201 km (0.109 R)
• M22: 5,875,456 km (0.111 R)
• M23: 6,099,554 km (0.108 R)
• M24: 6,976,945 km (0.1 R)
• M25: 7,681,252 km (0.084 R)
• M26: 7,877,225 km (0.11 R)
• M27: 8,058,389 km (0.084 R)
• M28: 8,257,503 km (0.078 R)
• M29: 8,847,966 km (0.062 R)
• M30: 9,070,717 km (0.098 R)
• M31: 9,873,759 km (0.03 R)
• M32: 10,230,101 km (0.11 R)
• M33: 10,337,811 km (0.113 R)
• M34: 10,463,922 km (0.065 R)
• M35: 10,681,438 km (0.12 R)
• M36: 10,992,003 km (0.1 R)
• M37: 11,979,648 km (0.052 R)
• M38: 12,245,184 km (0.058 R)
• M39: 12,820,986 km (0.116 R)

Planet 3 - Gas Giant

Semi-Major Axis: 4.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 625.1

Radius: 8.1

Gravity: 9.53 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 3.75 AU - 4.33 AU

Year: 5415 Days

Day: 11.6 Hours

Environment

Temp: -218 °C

Axial Tilt: 32.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 36,855,984 km

• M1: 101,727 km (0.074 R)
• M2: 260,749 km (0.107 R)
• M3: 365,767 km (0.112 R)
• M4: 487,091 km (0.117 R)
• M5: 553,213 km (0.11 R)
• M6: 850,314 km (0.056 R)
• M7: 1,074,262 km (0.092 R)
• M8: 1,148,164 km (0.098 R)
• M9: 1,696,141 km (0.049 R)
• M10: 1,961,378 km (0.041 R)
• M11: 2,590,287 km (0.068 R)
• M12: 2,813,188 km (0.052 R)
• M13: 2,937,504 km (0.117 R)
• M14: 3,169,979 km (0.085 R)
• M15: 3,496,701 km (0.076 R)
• M16: 3,880,120 km (0.118 R)
• M17: 3,972,272 km (0.08 R)
• M18: 4,300,640 km (0.039 R)
• M19: 5,235,626 km (0.1 R)
• M20: 5,752,337 km (0.106 R)
• M21: 5,963,570 km (0.109 R)
• M22: 6,123,789 km (0.062 R)
• M23: 6,339,509 km (0.116 R)
• M24: 6,585,149 km (0.056 R)
• M25: 6,778,429 km (0.104 R)
• M26: 7,142,401 km (0.078 R)
• M27: 7,341,067 km (0.113 R)
• M28: 7,627,995 km (0.1 R)
• M29: 8,035,799 km (0.099 R)
• M30: 8,630,750 km (0.103 R)
• M31: 8,903,168 km (0.086 R)
• M32: 9,025,090 km (0.076 R)
• M33: 9,086,275 km (0.113 R)
• M34: 9,209,095 km (0.103 R)
• M35: 9,301,696 km (0.112 R)
• M36: 9,925,968 km (0.063 R)
• M37: 10,115,958 km (0.069 R)
• M38: 10,179,537 km (0.106 R)
• M39: 10,920,345 km (0.082 R)
• M40: 11,578,726 km (0.067 R)
• M41: 11,946,138 km (0.059 R)
• M42: 12,182,054 km (0.059 R)
• M43: 13,037,155 km (0.106 R)
• M44: 14,337,759 km (0.089 R)
• M45: 14,445,021 km (0.095 R)
• M46: 14,804,504 km (0.109 R)
• M47: 15,312,838 km (0.119 R)
• M48: 15,789,906 km (0.083 R)
• M49: 16,346,410 km (0.106 R)
• M50: 16,833,949 km (0.117 R)
• M51: 16,947,195 km (0.113 R)
• M52: 17,060,590 km (0.089 R)
• M53: 17,250,280 km (0.074 R)
• M54: 17,823,390 km (0.106 R)
• M55: 18,015,772 km (0.097 R)
• M56: 18,480,423 km (0.094 R)
• M57: 18,558,214 km (0.098 R)
• M58: 18,870,575 km (0.109 R)
• M59: 18,948,964 km (0.087 R)
• M60: 19,184,730 km (0.118 R)
• M61: 19,461,037 km (0.062 R)
• M62: 19,937,806 km (0.112 R)
• M63: 20,137,519 km (0.103 R)
• M64: 21,065,026 km (0.08 R)
• M65: 21,431,690 km (0.078 R)
• M66: 21,554,510 km (0.112 R)
• M67: 22,088,874 km (0.106 R)
• M68: 22,337,056 km (0.097 R)
• M69: 22,586,137 km (0.118 R)
• M70: 22,711,051 km (0.1 R)
• M71: 23,507,211 km (0.104 R)
• M72: 23,675,957 km (0.087 R)
• M73: 23,802,816 km (0.117 R)
• M74: 24,911,785 km (0.103 R)
• M75: 26,958,883 km (0.117 R)
• M76: 27,401,244 km (0.114 R)
• M77: 27,623,396 km (0.102 R)
• M78: 28,697,958 km (0.045 R)
• M79: 28,788,165 km (0.096 R)
• M80: 28,968,730 km (0.076 R)
• M81: 29,104,415 km (0.049 R)
• M82: 29,467,340 km (0.099 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.42 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 562

Radius: 11.5

Gravity: 4.25 G

Time & Orbit

Eccentricity (e): 0.237

Orbit Range: 3.37 AU - 5.47 AU

Year: 6197 Days

Day: 12.2 Hours

Environment

Temp: -218 °C

Axial Tilt: 36.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 36,855,984 km

• M1: 180,415 km (0.101 R)
• M2: 328,966 km (0.095 R)
• M3: 473,926 km (0.105 R)
• M4: 693,536 km (0.118 R)
• M5: 1,078,900 km (0.062 R)
• M6: 1,327,681 km (0.114 R)
• M7: 1,425,967 km (0.076 R)
• M8: 1,560,904 km (0.108 R)
• M9: 1,753,736 km (0.053 R)
• M10: 2,143,737 km (0.115 R)
• M11: 2,260,274 km (0.066 R)
• M12: 2,685,132 km (0.102 R)
• M13: 2,874,972 km (0.086 R)
• M14: 3,025,617 km (0.113 R)
• M15: 3,357,724 km (0.061 R)
• M16: 3,818,635 km (0.095 R)
• M17: 3,937,117 km (0.097 R)
• M18: 4,472,827 km (0.075 R)
• M19: 4,673,437 km (0.066 R)
• M20: 4,800,446 km (0.099 R)
• M21: 4,954,233 km (0.066 R)
• M22: 5,452,094 km (0.115 R)
• M23: 5,720,623 km (0.076 R)
• M24: 5,802,153 km (0.068 R)
• M25: 6,131,718 km (0.118 R)
• M26: 6,495,689 km (0.086 R)
• M27: 6,895,714 km (0.112 R)
• M28: 7,215,554 km (0.085 R)
• M29: 7,362,609 km (0.081 R)
• M30: 7,451,320 km (0.036 R)
• M31: 7,540,481 km (0.118 R)
• M32: 7,839,826 km (0.073 R)
• M33: 7,930,482 km (0.065 R)
• M34: 8,419,667 km (0.116 R)
• M35: 8,699,116 km (0.074 R)
• M36: 9,044,986 km (0.092 R)
• M37: 9,427,359 km (0.052 R)
• M38: 9,588,176 km (0.115 R)
• M39: 9,847,579 km (0.058 R)
• M40: 10,142,137 km (0.093 R)
• M41: 11,452,016 km (0.111 R)
• M42: 11,623,755 km (0.047 R)
• M43: 11,727,276 km (0.073 R)
• M44: 12,144,206 km (0.082 R)
• M45: 12,249,223 km (0.092 R)
• M46: 12,743,345 km (0.084 R)
• M47: 12,850,158 km (0.092 R)
• M48: 14,375,458 km (0.119 R)
• M49: 14,560,810 km (0.112 R)
• M50: 14,934,056 km (0.108 R)
• M51: 15,046,554 km (0.113 R)
• M52: 15,727,972 km (0.09 R)
• M53: 16,574,546 km (0.103 R)
• M54: 16,768,874 km (0.046 R)
• M55: 17,278,105 km (0.076 R)
• M56: 17,514,769 km (0.079 R)
• M57: 17,633,550 km (0.063 R)
• M58: 17,752,630 km (0.115 R)
• M59: 18,111,216 km (0.068 R)
• M60: 19,079,413 km (0.102 R)
• M61: 19,283,315 km (0.051 R)
• M62: 19,405,985 km (0.044 R)
• M63: 19,734,353 km (0.099 R)
• M64: 20,772,263 km (0.053 R)
• M65: 21,150,147 km (0.117 R)
• M66: 21,657,733 km (0.104 R)
• M67: 22,041,002 km (0.077 R)
• M68: 22,383,581 km (0.028 R)
• M69: 23,334,874 km (0.109 R)
• M70: 23,947,029 km (0.106 R)
• M71: 24,343,463 km (0.101 R)
• M72: 24,830,853 km (0.059 R)
• M73: 25,410,994 km (0.096 R)
• M74: 26,721,321 km (0.095 R)
• M75: 26,949,458 km (0.09 R)
• M76: 27,453,603 km (0.058 R)
• M77: 27,683,834 km (0.093 R)
• M78: 27,776,136 km (0.096 R)
• M79: 28,007,265 km (0.094 R)
• M80: 28,378,417 km (0.091 R)
• M81: 29,360,228 km (0.11 R)
• M82: 30,021,001 km (0.095 R)
• M83: 30,638,990 km (0.075 R)
• M84: 30,734,434 km (0.04 R)
• M85: 32,323,762 km (0.092 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 328

Radius: 12.8

Gravity: 2 G

Time & Orbit

Eccentricity (e): 0.235

Orbit Range: 3.61 AU - 5.83 AU

Year: 6838 Days

Day: 14.4 Hours

Environment

Temp: -229 °C

Axial Tilt: 15.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 36,855,984 km

• M1: 192,532 km (0.037 R)
• M2: 502,499 km (0.087 R)
• M3: 616,942 km (0.114 R)
• M4: 1,033,721 km (0.059 R)
• M5: 1,186,610 km (0.109 R)
• M6: 1,500,317 km (0.063 R)
• M7: 1,790,687 km (0.096 R)
• M8: 1,874,611 km (0.03 R)
• M9: 2,134,762 km (0.068 R)
• M10: 2,278,376 km (0.098 R)
• M11: 2,369,780 km (0.104 R)
• M12: 3,065,111 km (0.107 R)
• M13: 3,777,645 km (0.113 R)
• M14: 3,864,711 km (0.057 R)
• M15: 3,974,666 km (0.029 R)
• M16: 4,063,527 km (0.097 R)
• M17: 4,197,866 km (0.078 R)
• M18: 4,494,070 km (0.109 R)
• M19: 4,679,870 km (0.08 R)
• M20: 4,915,636 km (0.074 R)
• M21: 5,035,165 km (0.119 R)
• M22: 6,282,063 km (0.098 R)
• M23: 6,463,974 km (0.087 R)
• M24: 6,568,693 km (0.118 R)
• M25: 6,674,159 km (0.114 R)
• M26: 6,993,551 km (0.078 R)
• M27: 7,703,094 km (0.118 R)
• M28: 8,151,139 km (0.106 R)
• M29: 8,521,544 km (0.069 R)
• M30: 8,868,311 km (0.07 R)
• M31: 9,249,337 km (0.086 R)
• M32: 9,815,864 km (0.065 R)
• M33: 11,045,110 km (0.092 R)
• M34: 12,030,960 km (0.101 R)
• M35: 12,192,675 km (0.061 R)
• M36: 12,354,989 km (0.067 R)
• M37: 12,485,438 km (0.102 R)
• M38: 12,583,574 km (0.046 R)
• M39: 12,682,010 km (0.091 R)
• M40: 12,978,662 km (0.104 R)
• M41: 13,277,709 km (0.115 R)
• M42: 14,325,193 km (0.075 R)
• M43: 14,634,262 km (0.119 R)
• M44: 16,141,161 km (0.111 R)
• M45: 16,248,124 km (0.041 R)
• M46: 17,477,070 km (0.088 R)
• M47: 17,587,025 km (0.037 R)
• M48: 18,511,540 km (0.106 R)
• M49: 19,300,519 km (0.054 R)
• M50: 19,985,378 km (0.117 R)
• M51: 20,678,315 km (0.054 R)
• M52: 20,872,194 km (0.096 R)
• M53: 21,693,038 km (0.086 R)
• M54: 22,246,251 km (0.086 R)
• M55: 22,484,710 km (0.085 R)
• M56: 22,924,228 km (0.111 R)
• M57: 24,014,797 km (0.078 R)
• M58: 25,246,436 km (0.093 R)
• M59: 25,911,698 km (0.112 R)
• M60: 26,037,210 km (0.089 R)
• M61: 26,456,533 km (0.061 R)
• M62: 26,540,757 km (0.104 R)
• M63: 27,259,574 km (0.084 R)
• M64: 27,344,546 km (0.039 R)
• M65: 27,728,115 km (0.089 R)
• M66: 27,899,255 km (0.084 R)
• M67: 28,500,788 km (0.117 R)
• M68: 29,106,510 km (0.107 R)

Planet 6 - Ice Giant

Semi-Major Axis: 6.13 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 304

Radius: 6.8

Gravity: 6.57 G

Time & Orbit

Eccentricity (e): 0.216

Orbit Range: 4.81 AU - 7.45 AU

Year: 10121 Days

Day: 15.6 Hours

Environment

Temp: -237 °C

Axial Tilt: 19.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 36,855,984 km

• M1: 188,643 km (0.1 R)
• M2: 266,135 km (0.093 R)
• M3: 423,960 km (0.032 R)
• M4: 508,034 km (0.117 R)
• M5: 598,242 km (0.102 R)
• M6: 824,733 km (0.116 R)
• M7: 901,028 km (0.054 R)
• M8: 995,873 km (0.113 R)
• M9: 1,094,009 km (0.045 R)
• M10: 1,178,382 km (0.072 R)
• M11: 1,229,994 km (0.086 R)
• M12: 1,353,562 km (0.105 R)
• M13: 1,729,202 km (0.087 R)
• M14: 1,788,293 km (0.075 R)
• M15: 2,220,780 km (0.116 R)
• M16: 2,799,575 km (0.095 R)
• M17: 3,082,015 km (0.094 R)
• M18: 3,202,292 km (0.092 R)
• M19: 3,299,830 km (0.106 R)
• M20: 3,373,432 km (0.069 R)
• M21: 4,193,677 km (0.109 R)
• M22: 4,598,489 km (0.111 R)
• M23: 5,329,723 km (0.095 R)
• M24: 5,416,341 km (0.103 R)
• M25: 5,532,728 km (0.113 R)
• M26: 5,916,446 km (0.11 R)
• M27: 6,247,955 km (0.112 R)
• M28: 6,709,764 km (0.035 R)
• M29: 6,866,093 km (0.105 R)
• M30: 7,698,606 km (0.046 R)
• M31: 7,796,592 km (0.083 R)
• M32: 9,144,020 km (0.094 R)
• M33: 9,352,260 km (0.087 R)
• M34: 9,950,802 km (0.119 R)
• M35: 10,022,010 km (0.062 R)
• M36: 11,819,578 km (0.068 R)
• M37: 12,581,480 km (0.102 R)
• M38: 12,929,594 km (0.089 R)
• M39: 13,124,221 km (0.044 R)
• M40: 14,072,373 km (0.096 R)
• M41: 14,514,285 km (0.062 R)
• M42: 14,716,691 km (0.089 R)
• M43: 15,083,355 km (0.071 R)
• M44: 15,618,167 km (0.062 R)
• M45: 15,742,483 km (0.119 R)
• M46: 16,579,782 km (0.089 R)
• M47: 16,706,641 km (0.067 R)
• M48: 16,918,622 km (0.114 R)
• M49: 17,603,331 km (0.067 R)
• M50: 17,905,818 km (0.095 R)
• M51: 18,428,214 km (0.113 R)
• M52: 18,472,046 km (0.098 R)
• M53: 19,800,924 km (0.082 R)
• M54: 19,890,533 km (0.086 R)
• M55: 20,749,374 km (0.035 R)
• M56: 20,977,361 km (0.077 R)
• M57: 21,252,023 km (0.118 R)
• M58: 21,851,312 km (0.1 R)
• M59: 22,690,257 km (0.079 R)
• M60: 22,972,249 km (0.047 R)
• M61: 24,016,143 km (0.095 R)
• M62: 24,591,945 km (0.101 R)
• M63: 25,513,019 km (0.053 R)
• M64: 25,708,394 km (0.051 R)
• M65: 25,855,299 km (0.092 R)
• M66: 25,953,286 km (0.069 R)
• M67: 26,051,422 km (0.099 R)
• M68: 26,346,728 km (0.077 R)
• M69: 26,494,830 km (0.038 R)
• M70: 26,742,115 km (0.108 R)
• M71: 26,791,782 km (0.081 R)
• M72: 26,890,965 km (0.032 R)
• M73: 27,940,095 km (0.096 R)
• M74: 28,191,868 km (0.059 R)
• M75: 29,769,677 km (0.116 R)
• M76: 30,958,681 km (0.049 R)
• M77: 31,375,909 km (0.108 R)
• M78: 31,480,628 km (0.071 R)
• M79: 31,952,609 km (0.075 R)
• M80: 32,057,926 km (0.115 R)
• M81: 32,585,857 km (0.117 R)
• M82: 33,383,064 km (0.082 R)
• M83: 33,971,732 km (0.101 R)
• M84: 34,132,849 km (0.106 R)
• M85: 34,455,980 km (0.071 R)
• M86: 34,888,318 km (0.076 R)
• M87: 35,268,147 km (0.069 R)
• M88: 35,322,451 km (0.11 R)
• M89: 35,485,662 km (0.075 R)
• M90: 36,141,350 km (0.079 R)
• M91: 36,855,979 km (0.115 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 234 - 12,130 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit