🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.37 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.74 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 446.9

Radius: 14.2

Gravity: 2.22 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 0.71 AU - 0.77 AU

Year: 405 Days

Day: 13.4 Hours

Environment

Temp: -136 °C

Axial Tilt: 1.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (34)

Outer Limit: 70,968,085 km

• M1: 176,675 km (0.038 R)
• M2: 271,670 km (0.113 R)
• M3: 368,011 km (0.096 R)
• M4: 462,108 km (0.112 R)
• M5: 555,606 km (0.097 R)
• M6: 660,774 km (0.099 R)
• M7: 813,812 km (0.09 R)
• M8: 1,015,770 km (0.096 R)
• M9: 1,121,386 km (0.034 R)
• M10: 1,248,394 km (0.115 R)
• M11: 1,467,106 km (0.082 R)
• M12: 1,636,002 km (0.11 R)
• M13: 1,796,970 km (0.112 R)
• M14: 1,917,396 km (0.072 R)
• M15: 2,035,578 km (0.117 R)
• M16: 2,140,446 km (0.065 R)
• M17: 2,252,495 km (0.092 R)
• M18: 2,416,305 km (0.084 R)
• M19: 2,589,689 km (0.078 R)
• M20: 2,750,058 km (0.116 R)
• M21: 2,854,926 km (0.097 R)
• M22: 2,978,942 km (0.065 R)
• M23: 3,068,701 km (0.082 R)
• M24: 3,171,624 km (0.093 R)
• M25: 3,337,528 km (0.09 R)
• M26: 3,437,161 km (0.08 R)
• M27: 3,614,135 km (0.114 R)
• M28: 3,703,744 km (0.062 R)
• M29: 3,839,579 km (0.119 R)
• M30: 4,069,810 km (0.077 R)
• M31: 4,399,823 km (0.082 R)
• M32: 4,509,478 km (0.092 R)
• M33: 4,675,831 km (0.056 R)
• M34: 4,844,129 km (0.112 R)

Planet 2 - Gas Giant

Semi-Major Axis: 3.34 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 159.8

Radius: 12.7

Gravity: 0.99 G

Time & Orbit

Eccentricity (e): 0.178

Orbit Range: 2.75 AU - 3.93 AU

Year: 3881 Days

Day: 13.7 Hours

Environment

Temp: -215 °C

Axial Tilt: 38.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (57)

Outer Limit: 70,968,085 km

• M1: 161,865 km (0.112 R)
• M2: 242,797 km (0.079 R)
• M3: 363,972 km (0.113 R)
• M4: 445,802 km (0.089 R)
• M5: 656,884 km (0.09 R)
• M6: 740,509 km (0.056 R)
• M7: 861,385 km (0.088 R)
• M8: 1,007,242 km (0.119 R)
• M9: 1,134,101 km (0.101 R)
• M10: 1,228,199 km (0.088 R)
• M11: 1,335,011 km (0.092 R)
• M12: 1,445,115 km (0.046 R)
• M13: 1,537,717 km (0.034 R)
• M14: 1,642,884 km (0.109 R)
• M15: 1,816,717 km (0.118 R)
• M16: 2,100,653 km (0.117 R)
• M17: 2,206,569 km (0.098 R)
• M18: 2,535,086 km (0.096 R)
• M19: 2,737,342 km (0.052 R)
• M20: 2,971,313 km (0.063 R)
• M21: 3,403,800 km (0.071 R)
• M22: 3,613,387 km (0.092 R)
• M23: 3,885,206 km (0.114 R)
• M24: 4,403,413 km (0.063 R)
• M25: 4,694,082 km (0.109 R)
• M26: 4,802,690 km (0.114 R)
• M27: 5,505,202 km (0.113 R)
• M28: 5,835,215 km (0.072 R)
• M29: 6,188,714 km (0.06 R)
• M30: 6,549,245 km (0.089 R)
• M31: 7,058,626 km (0.075 R)
• M32: 7,183,540 km (0.065 R)
• M33: 7,544,370 km (0.117 R)
• M34: 7,635,475 km (0.115 R)
• M35: 7,929,734 km (0.067 R)
• M36: 8,246,283 km (0.05 R)
• M37: 9,104,676 km (0.107 R)
• M38: 9,201,765 km (0.097 R)
• M39: 9,436,334 km (0.116 R)
• M40: 9,613,608 km (0.06 R)
• M41: 10,293,231 km (0.095 R)
• M42: 10,394,359 km (0.111 R)
• M43: 10,864,396 km (0.096 R)
• M44: 11,029,552 km (0.051 R)
• M45: 11,446,182 km (0.119 R)
• M46: 11,910,234 km (0.05 R)
• M47: 12,123,262 km (0.082 R)
• M48: 12,316,093 km (0.118 R)
• M49: 12,596,440 km (0.102 R)
• M50: 12,726,440 km (0.069 R)
• M51: 12,857,039 km (0.09 R)
• M52: 13,229,388 km (0.045 R)
• M53: 13,494,326 km (0.087 R)
• M54: 13,761,059 km (0.115 R)
• M55: 14,617,208 km (0.107 R)
• M56: 15,166,831 km (0.118 R)
• M57: 15,397,810 km (0.089 R)

Planet 3 - Gas Giant

Semi-Major Axis: 4.12 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 410.9

Radius: 10.2

Gravity: 3.95 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 3.49 AU - 4.75 AU

Year: 5317 Days

Day: 6.6 Hours

Environment

Temp: -220 °C

Axial Tilt: 27 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 70,968,085 km

• M1: 166,054 km (0.109 R)
• M2: 413,189 km (0.059 R)
• M3: 524,640 km (0.105 R)
• M4: 961,914 km (0.097 R)
• M5: 1,569,730 km (0.083 R)
• M6: 1,645,577 km (0.077 R)
• M7: 1,864,588 km (0.069 R)
• M8: 3,212,016 km (0.117 R)
• M9: 3,507,023 km (0.111 R)
• M10: 4,018,199 km (0.074 R)
• M11: 4,123,217 km (0.079 R)
• M12: 4,552,712 km (0.039 R)
• M13: 4,906,661 km (0.099 R)
• M14: 5,178,031 km (0.118 R)
• M15: 6,190,509 km (0.104 R)
• M16: 6,434,653 km (0.097 R)
• M17: 6,957,647 km (0.102 R)
• M18: 7,084,357 km (0.08 R)
• M19: 7,965,189 km (0.113 R)
• M20: 8,177,618 km (0.046 R)
• M21: 8,472,625 km (0.106 R)
• M22: 9,017,909 km (0.105 R)
• M23: 9,100,786 km (0.092 R)
• M24: 9,183,813 km (0.086 R)
• M25: 9,462,365 km (0.066 R)
• M26: 10,459,584 km (0.086 R)
• M27: 10,721,530 km (0.116 R)
• M28: 11,133,074 km (0.11 R)
• M29: 11,221,935 km (0.116 R)
• M30: 11,370,635 km (0.1 R)
• M31: 11,490,014 km (0.087 R)
• M32: 11,941,500 km (0.109 R)
• M33: 12,032,456 km (0.101 R)
• M34: 12,521,791 km (0.076 R)
• M35: 12,706,843 km (0.094 R)
• M36: 12,986,292 km (0.09 R)
• M37: 13,079,940 km (0.052 R)
• M38: 13,456,628 km (0.092 R)
• M39: 13,677,883 km (0.061 R)
• M40: 14,284,801 km (0.098 R)
• M41: 14,349,278 km (0.119 R)
• M42: 14,575,470 km (0.115 R)
• M43: 14,705,171 km (0.12 R)
• M44: 14,835,322 km (0.029 R)
• M45: 15,064,057 km (0.083 R)
• M46: 15,195,254 km (0.113 R)
• M47: 15,823,864 km (0.074 R)
• M48: 15,990,666 km (0.094 R)
• M49: 16,494,512 km (0.09 R)
• M50: 16,562,130 km (0.107 R)
• M51: 16,765,433 km (0.112 R)
• M52: 17,690,696 km (0.054 R)
• M53: 17,898,488 km (0.072 R)
• M54: 18,002,757 km (0.119 R)
• M55: 18,107,177 km (0.083 R)
• M56: 19,056,226 km (0.076 R)
• M57: 19,162,590 km (0.062 R)
• M58: 20,057,335 km (0.112 R)
• M59: 20,710,030 km (0.035 R)
• M60: 20,782,884 km (0.108 R)
• M61: 20,892,539 km (0.114 R)
• M62: 21,148,950 km (0.077 R)
• M63: 21,222,403 km (0.078 R)
• M64: 21,332,806 km (0.119 R)
• M65: 21,443,359 km (0.103 R)
• M66: 22,259,864 km (0.094 R)
• M67: 22,860,051 km (0.114 R)
• M68: 23,389,477 km (0.11 R)
• M69: 23,541,619 km (0.117 R)
• M70: 25,080,083 km (0.058 R)
• M71: 26,058,004 km (0.048 R)
• M72: 26,413,150 km (0.12 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.53 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 767.2

Radius: 10.8

Gravity: 6.58 G

Time & Orbit

Eccentricity (e): 0.146

Orbit Range: 3.87 AU - 5.19 AU

Year: 6130 Days

Day: 11.4 Hours

Environment

Temp: -219 °C

Axial Tilt: 42.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 70,968,085 km

• M1: 206,744 km (0.052 R)
• M2: 284,386 km (0.108 R)
• M3: 571,015 km (0.084 R)
• M4: 1,493,735 km (0.076 R)
• M5: 1,659,340 km (0.06 R)
• M6: 1,811,780 km (0.105 R)
• M7: 1,988,904 km (0.119 R)
• M8: 2,172,011 km (0.063 R)
• M9: 3,802,030 km (0.116 R)
• M10: 4,030,466 km (0.078 R)
• M11: 4,159,270 km (0.12 R)
• M12: 4,289,569 km (0.046 R)
• M13: 4,906,212 km (0.047 R)
• M14: 4,988,790 km (0.116 R)
• M15: 6,371,224 km (0.083 R)
• M16: 6,491,500 km (0.071 R)
• M17: 6,642,893 km (0.066 R)
• M18: 6,918,602 km (0.113 R)
• M19: 7,576,384 km (0.092 R)
• M20: 7,768,019 km (0.106 R)
• M21: 8,058,538 km (0.114 R)
• M22: 8,156,076 km (0.111 R)
• M23: 8,616,987 km (0.078 R)
• M24: 8,716,769 km (0.032 R)
• M25: 8,850,509 km (0.07 R)
• M26: 9,120,085 km (0.081 R)
• M27: 9,426,611 km (0.09 R)
• M28: 9,563,941 km (0.095 R)
• M29: 9,875,404 km (0.077 R)
• M30: 9,945,117 km (0.117 R)
• M31: 10,049,835 km (0.114 R)
• M32: 10,973,453 km (0.108 R)
• M33: 11,045,708 km (0.046 R)
• M34: 11,154,316 km (0.106 R)
• M35: 11,336,078 km (0.032 R)
• M36: 11,482,085 km (0.106 R)
• M37: 11,776,195 km (0.068 R)
• M38: 11,887,196 km (0.112 R)
• M39: 12,072,847 km (0.092 R)
• M40: 12,597,786 km (0.108 R)
• M41: 12,939,318 km (0.107 R)
• M42: 13,130,355 km (0.085 R)
• M43: 13,592,612 km (0.032 R)
• M44: 15,575,682 km (0.081 R)
• M45: 15,656,913 km (0.047 R)
• M46: 16,435,420 km (0.102 R)
• M47: 16,517,998 km (0.116 R)
• M48: 16,683,753 km (0.096 R)
• M49: 17,310,418 km (0.109 R)
• M50: 17,478,716 km (0.035 R)
• M51: 17,774,770 km (0.063 R)
• M52: 18,029,835 km (0.107 R)
• M53: 18,888,676 km (0.107 R)
• M54: 19,236,042 km (0.103 R)
• M55: 19,585,353 km (0.038 R)
• M56: 20,113,434 km (0.12 R)
• M57: 20,646,301 km (0.104 R)
• M58: 21,454,130 km (0.065 R)
• M59: 22,409,611 km (0.077 R)
• M60: 22,685,171 km (0.072 R)
• M61: 24,173,819 km (0.111 R)
• M62: 25,167,897 km (0.072 R)
• M63: 25,597,991 km (0.043 R)
• M64: 25,741,904 km (0.114 R)
• M65: 25,982,308 km (0.034 R)
• M66: 26,223,460 km (0.116 R)
• M67: 26,562,448 km (0.118 R)
• M68: 26,708,157 km (0.109 R)
• M69: 26,805,395 km (0.037 R)
• M70: 27,195,696 km (0.05 R)
• M71: 27,440,588 km (0.098 R)
• M72: 27,784,663 km (0.049 R)
• M73: 27,883,248 km (0.051 R)
• M74: 28,975,312 km (0.057 R)
• M75: 29,375,786 km (0.029 R)
• M76: 30,894,204 km (0.088 R)
• M77: 31,869,134 km (0.03 R)
• M78: 32,127,340 km (0.117 R)
• M79: 32,541,875 km (0.102 R)
• M80: 32,697,906 km (0.03 R)
• M81: 32,854,086 km (0.118 R)
• M82: 32,958,206 km (0.095 R)
• M83: 33,796,253 km (0.113 R)
• M84: 34,429,501 km (0.092 R)
• M85: 34,747,546 km (0.064 R)
• M86: 35,226,409 km (0.075 R)
• M87: 35,439,885 km (0.099 R)
• M88: 35,761,072 km (0.098 R)

Planet 5 - Gas Giant

Semi-Major Axis: 6.07 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 754.2

Radius: 10.1

Gravity: 7.39 G

Time & Orbit

Eccentricity (e): 0.25

Orbit Range: 4.55 AU - 7.59 AU

Year: 9509 Days

Day: 10.3 Hours

Environment

Temp: -224 °C

Axial Tilt: 5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 70,968,085 km

• M1: 142,417 km (0.048 R)
• M2: 231,428 km (0.087 R)
• M3: 724,652 km (0.091 R)
• M4: 1,009,636 km (0.047 R)
• M5: 1,612,515 km (0.113 R)
• M6: 1,703,621 km (0.107 R)
• M7: 1,843,345 km (0.096 R)
• M8: 2,388,928 km (0.105 R)
• M9: 2,519,677 km (0.088 R)
• M10: 2,679,896 km (0.117 R)
• M11: 2,871,082 km (0.111 R)
• M12: 2,954,408 km (0.081 R)
• M13: 3,501,039 km (0.102 R)
• M14: 3,590,199 km (0.075 R)
• M15: 3,680,257 km (0.108 R)
• M16: 3,985,736 km (0.046 R)
• M17: 5,051,322 km (0.1 R)
• M18: 5,186,259 km (0.055 R)
• M19: 5,494,281 km (0.091 R)
• M20: 5,914,352 km (0.082 R)
• M21: 6,236,286 km (0.087 R)
• M22: 6,344,745 km (0.076 R)
• M23: 6,637,508 km (0.073 R)
• M24: 6,897,210 km (0.096 R)
• M25: 7,047,107 km (0.09 R)
• M26: 7,122,504 km (0.064 R)
• M27: 7,350,192 km (0.086 R)
• M28: 7,657,616 km (0.101 R)
• M29: 8,047,767 km (0.104 R)
• M30: 8,726,044 km (0.108 R)
• M31: 10,695,201 km (0.099 R)
• M32: 10,868,884 km (0.041 R)
• M33: 11,528,760 km (0.032 R)
• M34: 12,201,651 km (0.068 R)
• M35: 13,211,437 km (0.118 R)
• M36: 13,444,809 km (0.087 R)
• M37: 14,295,722 km (0.066 R)
• M38: 14,921,191 km (0.119 R)
• M39: 17,357,991 km (0.104 R)
• M40: 17,921,975 km (0.067 R)
• M41: 18,025,047 km (0.097 R)
• M42: 18,857,560 km (0.087 R)
• M43: 19,014,937 km (0.06 R)
• M44: 19,120,253 km (0.112 R)
• M45: 19,755,745 km (0.11 R)
• M46: 20,830,157 km (0.069 R)
• M47: 20,938,765 km (0.088 R)
• M48: 21,210,734 km (0.113 R)
• M49: 21,978,770 km (0.06 R)
• M50: 22,923,630 km (0.036 R)
• M51: 23,203,976 km (0.118 R)
• M52: 23,542,067 km (0.108 R)
• M53: 23,655,014 km (0.091 R)
• M54: 24,280,034 km (0.102 R)
• M55: 24,795,249 km (0.043 R)
• M56: 25,662,168 km (0.109 R)
• M57: 26,070,122 km (0.045 R)
• M58: 26,480,319 km (0.038 R)
• M59: 26,597,903 km (0.054 R)
• M60: 29,654,038 km (0.112 R)
• M61: 30,512,281 km (0.028 R)
• M62: 31,316,519 km (0.093 R)
• M63: 32,127,639 km (0.057 R)
• M64: 32,756,399 km (0.119 R)
• M65: 32,882,659 km (0.104 R)
• M66: 33,262,339 km (0.115 R)
• M67: 34,217,820 km (0.07 R)
• M68: 35,311,680 km (0.12 R)
• M69: 35,895,411 km (0.057 R)
• M70: 36,155,861 km (0.119 R)
• M71: 36,547,657 km (0.116 R)
• M72: 37,269,766 km (0.084 R)
• M73: 37,335,589 km (0.098 R)
• M74: 37,401,562 km (0.112 R)
• M75: 39,935,002 km (0.066 R)
• M76: 40,340,113 km (0.104 R)
• M77: 40,475,349 km (0.096 R)
• M78: 41,426,942 km (0.09 R)
• M79: 41,563,375 km (0.095 R)
• M80: 42,042,537 km (0.057 R)
• M81: 43,213,439 km (0.116 R)
• M82: 43,837,861 km (0.105 R)
• M83: 43,907,274 km (0.11 R)
• M84: 44,604,849 km (0.108 R)
• M85: 45,517,097 km (0.042 R)
• M86: 46,010,920 km (0.037 R)
• M87: 47,431,501 km (0.076 R)
• M88: 47,645,725 km (0.075 R)
• M89: 47,788,741 km (0.111 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.86 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 790.7

Radius: 8

Gravity: 12.35 G

Time & Orbit

Eccentricity (e): 0.156

Orbit Range: 7.48 AU - 10.24 AU

Year: 16768 Days

Day: 17.3 Hours

Environment

Temp: -238 °C

Axial Tilt: 39.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 70,968,085 km

• M1: 132,394 km (0.12 R)
• M2: 192,682 km (0.117 R)
• M3: 467,793 km (0.078 R)
• M4: 524,341 km (0.065 R)
• M5: 1,497,325 km (0.06 R)
• M6: 1,703,022 km (0.075 R)
• M7: 2,077,017 km (0.12 R)
• M8: 2,273,588 km (0.095 R)
• M9: 2,374,268 km (0.061 R)
• M10: 2,972,061 km (0.046 R)
• M11: 3,119,415 km (0.112 R)
• M12: 3,231,464 km (0.088 R)
• M13: 3,421,303 km (0.042 R)
• M14: 3,653,928 km (0.1 R)
• M15: 4,012,514 km (0.069 R)
• M16: 4,216,566 km (0.097 R)
• M17: 4,677,626 km (0.051 R)
• M18: 4,763,196 km (0.071 R)
• M19: 4,849,365 km (0.098 R)
• M20: 5,332,117 km (0.114 R)
• M21: 5,511,485 km (0.113 R)
• M22: 5,784,351 km (0.078 R)
• M23: 6,870,881 km (0.115 R)
• M24: 7,362,609 km (0.109 R)
• M25: 7,512,356 km (0.106 R)
• M26: 7,865,706 km (0.058 R)
• M27: 9,064,584 km (0.089 R)
• M28: 9,494,827 km (0.108 R)
• M29: 10,487,260 km (0.114 R)
• M30: 10,768,803 km (0.048 R)
• M31: 10,938,896 km (0.118 R)
• M32: 13,351,311 km (0.102 R)
• M33: 13,840,645 km (0.096 R)
• M34: 15,216,198 km (0.086 R)
• M35: 16,373,786 km (0.054 R)
• M36: 16,504,086 km (0.053 R)
• M37: 16,700,358 km (0.072 R)
• M38: 16,765,882 km (0.057 R)
• M39: 17,759,661 km (0.112 R)
• M40: 18,704,521 km (0.095 R)
• M41: 19,804,065 km (0.104 R)
• M42: 20,152,030 km (0.107 R)
• M43: 20,783,483 km (0.094 R)
• M44: 22,571,028 km (0.086 R)
• M45: 22,934,401 km (0.115 R)
• M46: 23,740,733 km (0.111 R)
• M47: 24,258,791 km (0.109 R)
• M48: 24,855,237 km (0.052 R)
• M49: 25,230,578 km (0.116 R)
• M50: 25,607,715 km (0.076 R)
• M51: 26,903,980 km (0.114 R)
• M52: 27,289,195 km (0.038 R)
• M53: 28,065,309 km (0.114 R)
• M54: 28,377,818 km (0.097 R)
• M55: 29,322,080 km (0.113 R)
• M56: 29,798,101 km (0.085 R)
• M57: 30,116,894 km (0.072 R)
• M58: 30,196,779 km (0.113 R)
• M59: 30,356,699 km (0.088 R)
• M60: 30,677,437 km (0.03 R)
• M61: 31,890,227 km (0.103 R)
• M62: 34,362,481 km (0.092 R)
• M63: 36,724,931 km (0.107 R)
• M64: 37,066,612 km (0.102 R)
• M65: 37,152,332 km (0.111 R)
• M66: 37,237,902 km (0.109 R)
• M67: 37,667,248 km (0.082 R)
• M68: 37,925,753 km (0.08 R)
• M69: 39,401,087 km (0.094 R)
• M70: 41,426,792 km (0.119 R)
• M71: 41,782,536 km (0.114 R)
• M72: 41,871,696 km (0.088 R)
• M73: 42,318,096 km (0.109 R)
• M74: 42,676,383 km (0.103 R)
• M75: 42,766,142 km (0.109 R)
• M76: 47,610,869 km (0.096 R)
• M77: 49,389,438 km (0.08 R)
• M78: 51,475,879 km (0.109 R)
• M79: 53,397,614 km (0.109 R)
• M80: 53,591,044 km (0.099 R)
• M81: 56,422,333 km (0.032 R)
• M82: 58,403,158 km (0.118 R)
• M83: 58,502,791 km (0.098 R)
• M84: 59,001,849 km (0.117 R)
• M85: 61,518,085 km (0.108 R)
• M86: 61,822,367 km (0.116 R)
• M87: 62,636,329 km (0.071 R)
• M88: 63,351,407 km (0.077 R)
• M89: 63,453,732 km (0.103 R)
• M90: 63,966,404 km (0.111 R)
• M91: 64,995,936 km (0.082 R)
• M92: 66,967,188 km (0.056 R)
• M93: 70,649,390 km (0.053 R)

Kuiper Belt

Range: 30 - 57 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 433 - 13,679 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit