🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 185.7

Radius: 14

Gravity: 0.95 G

Time & Orbit

Eccentricity (e): 0.106

Orbit Range: 0.81 AU - 1.01 AU

Year: 610 Days

Day: 8.3 Hours

Environment

Temp: -163 °C

Axial Tilt: 6.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (36)

Outer Limit: 17,043,776 km

• M1: 177,423 km (0.052 R)
• M2: 271,221 km (0.043 R)
• M3: 381,325 km (0.12 R)
• M4: 490,382 km (0.097 R)
• M5: 601,084 km (0.118 R)
• M6: 688,599 km (0.116 R)
• M7: 781,350 km (0.086 R)
• M8: 905,366 km (0.111 R)
• M9: 993,330 km (0.09 R)
• M10: 1,084,734 km (0.105 R)
• M11: 1,238,222 km (0.116 R)
• M12: 1,328,878 km (0.093 R)
• M13: 1,431,053 km (0.111 R)
• M14: 1,549,834 km (0.117 R)
• M15: 1,720,076 km (0.042 R)
• M16: 1,817,465 km (0.111 R)
• M17: 1,911,861 km (0.056 R)
• M18: 2,178,893 km (0.096 R)
• M19: 2,387,432 km (0.092 R)
• M20: 2,658,803 km (0.069 R)
• M21: 2,761,277 km (0.068 R)
• M22: 2,870,783 km (0.077 R)
• M23: 2,975,801 km (0.055 R)
• M24: 3,106,101 km (0.073 R)
• M25: 3,208,126 km (0.049 R)
• M26: 3,317,482 km (0.107 R)
• M27: 3,440,452 km (0.092 R)
• M28: 3,672,029 km (0.108 R)
• M29: 3,799,337 km (0.069 R)
• M30: 3,947,589 km (0.117 R)
• M31: 4,065,023 km (0.07 R)
• M32: 4,157,175 km (0.055 R)
• M33: 4,316,946 km (0.084 R)
• M34: 4,444,702 km (0.12 R)
• M35: 4,532,965 km (0.113 R)
• M36: 4,656,234 km (0.057 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.95 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 697.5

Radius: 9.1

Gravity: 8.42 G

Time & Orbit

Eccentricity (e): 0.124

Orbit Range: 0.83 AU - 1.07 AU

Year: 651 Days

Day: 7.1 Hours

Environment

Temp: -174 °C

Axial Tilt: 39.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 17,043,776 km

• M1: 119,678 km (0.096 R)
• M2: 189,092 km (0.07 R)
• M3: 249,529 km (0.068 R)
• M4: 352,752 km (0.111 R)
• M5: 469,438 km (0.097 R)
• M6: 546,631 km (0.038 R)
• M7: 637,885 km (0.091 R)
• M8: 832,063 km (0.102 R)
• M9: 901,178 km (0.118 R)
• M10: 1,040,004 km (0.119 R)
• M11: 1,097,600 km (0.103 R)
• M12: 1,351,467 km (0.081 R)
• M13: 1,446,761 km (0.111 R)
• M14: 1,531,284 km (0.082 R)
• M15: 1,843,794 km (0.064 R)
• M16: 1,942,977 km (0.077 R)
• M17: 2,131,919 km (0.101 R)
• M18: 2,243,669 km (0.099 R)
• M19: 2,380,401 km (0.092 R)
• M20: 2,473,152 km (0.083 R)
• M21: 2,590,886 km (0.12 R)
• M22: 2,774,891 km (0.099 R)
• M23: 3,164,593 km (0.101 R)
• M24: 3,232,511 km (0.101 R)
• M25: 3,301,176 km (0.103 R)
• M26: 3,378,818 km (0.087 R)
• M27: 3,553,847 km (0.05 R)
• M28: 3,651,235 km (0.049 R)
• M29: 3,803,675 km (0.061 R)
• M30: 3,894,481 km (0.113 R)
• M31: 3,967,485 km (0.062 R)
• M32: 4,050,213 km (0.09 R)
• M33: 4,142,814 km (0.118 R)
• M34: 4,226,888 km (0.032 R)
• M35: 4,396,532 km (0.084 R)
• M36: 4,558,846 km (0.118 R)
• M37: 4,830,665 km (0.057 R)
• M38: 4,938,824 km (0.093 R)
• M39: 4,998,214 km (0.078 R)
• M40: 5,390,011 km (0.08 R)
• M41: 5,533,027 km (0.112 R)
• M42: 5,594,811 km (0.08 R)
• M43: 5,718,827 km (0.1 R)
• M44: 5,791,682 km (0.071 R)
• M45: 5,906,722 km (0.086 R)
• M46: 6,117,955 km (0.034 R)
• M47: 6,224,468 km (0.115 R)
• M48: 6,320,809 km (0.088 R)
• M49: 6,711,559 km (0.118 R)
• M50: 6,777,382 km (0.088 R)
• M51: 7,054,138 km (0.078 R)
• M52: 7,177,107 km (0.1 R)
• M53: 7,402,551 km (0.086 R)
• M54: 7,527,615 km (0.078 R)
• M55: 7,641,758 km (0.105 R)
• M56: 7,745,131 km (0.094 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 949.9

Radius: 11.3

Gravity: 7.44 G

Time & Orbit

Eccentricity (e): 0.178

Orbit Range: 0.81 AU - 1.17 AU

Year: 692 Days

Day: 10.7 Hours

Environment

Temp: -184 °C

Axial Tilt: 46.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 17,043,776 km

• M1: 141,968 km (0.062 R)
• M2: 216,917 km (0.091 R)
• M3: 304,880 km (0.116 R)
• M4: 486,492 km (0.045 R)
• M5: 575,802 km (0.075 R)
• M6: 676,781 km (0.064 R)
• M7: 778,956 km (0.069 R)
• M8: 928,105 km (0.118 R)
• M9: 1,100,143 km (0.104 R)
• M10: 1,203,365 km (0.055 R)
• M11: 1,316,760 km (0.1 R)
• M12: 1,598,453 km (0.116 R)
• M13: 1,686,716 km (0.104 R)
• M14: 1,876,256 km (0.101 R)
• M15: 2,065,049 km (0.091 R)
• M16: 2,177,995 km (0.113 R)
• M17: 2,268,353 km (0.05 R)
• M18: 2,343,151 km (0.112 R)
• M19: 2,503,969 km (0.046 R)
• M20: 2,581,461 km (0.064 R)
• M21: 2,721,185 km (0.104 R)
• M22: 3,045,065 km (0.064 R)
• M23: 3,211,717 km (0.078 R)
• M24: 3,296,239 km (0.066 R)
• M25: 3,457,955 km (0.092 R)
• M26: 3,573,594 km (0.062 R)
• M27: 3,680,856 km (0.081 R)
• M28: 3,759,544 km (0.1 R)
• M29: 3,918,567 km (0.098 R)
• M30: 3,999,050 km (0.095 R)
• M31: 4,100,178 km (0.109 R)
• M32: 4,284,782 km (0.119 R)
• M33: 4,377,982 km (0.105 R)
• M34: 4,471,929 km (0.072 R)
• M35: 4,545,531 km (0.113 R)
• M36: 4,619,582 km (0.057 R)
• M37: 4,768,731 km (0.119 R)
• M38: 4,887,063 km (0.079 R)
• M39: 5,170,701 km (0.113 R)
• M40: 5,292,324 km (0.047 R)
• M41: 5,811,428 km (0.052 R)
• M42: 5,984,214 km (0.088 R)
• M43: 6,065,446 km (0.111 R)
• M44: 6,276,079 km (0.114 R)
• M45: 6,524,861 km (0.085 R)
• M46: 6,668,624 km (0.107 R)
• M47: 6,740,730 km (0.102 R)
• M48: 6,849,638 km (0.118 R)
• M49: 7,118,166 km (0.096 R)
• M50: 7,427,385 km (0.058 R)
• M51: 7,602,713 km (0.114 R)
• M52: 7,741,241 km (0.102 R)
• M53: 8,239,552 km (0.108 R)
• M54: 8,317,043 km (0.098 R)
• M55: 8,761,349 km (0.073 R)
• M56: 8,880,279 km (0.089 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 826.4

Radius: 10.7

Gravity: 7.22 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 1.62 AU - 2.54 AU

Year: 2109 Days

Day: 9 Hours

Environment

Temp: -212 °C

Axial Tilt: 32.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 17,043,776 km

• M1: 204,051 km (0.108 R)
• M2: 271,221 km (0.107 R)
• M3: 609,462 km (0.101 R)
• M4: 709,094 km (0.09 R)
• M5: 897,737 km (0.089 R)
• M6: 1,083,089 km (0.054 R)
• M7: 1,165,068 km (0.114 R)
• M8: 1,303,147 km (0.115 R)
• M9: 1,526,347 km (0.081 R)
• M10: 1,654,552 km (0.101 R)
• M11: 1,738,028 km (0.117 R)
• M12: 1,859,950 km (0.091 R)
• M13: 2,048,144 km (0.09 R)
• M14: 2,151,217 km (0.103 R)
• M15: 2,376,063 km (0.092 R)
• M16: 2,484,671 km (0.072 R)
• M17: 2,622,600 km (0.081 R)
• M18: 2,692,612 km (0.092 R)
• M19: 2,820,219 km (0.102 R)
• M20: 3,008,264 km (0.11 R)
• M21: 3,185,387 km (0.102 R)
• M22: 3,769,268 km (0.103 R)
• M23: 3,960,753 km (0.082 R)
• M24: 4,041,386 km (0.059 R)
• M25: 4,122,618 km (0.098 R)
• M26: 4,486,739 km (0.073 R)
• M27: 4,913,093 km (0.096 R)
• M28: 5,281,403 km (0.095 R)
• M29: 5,531,830 km (0.093 R)
• M30: 5,622,337 km (0.093 R)
• M31: 6,212,800 km (0.107 R)
• M32: 6,287,898 km (0.097 R)
• M33: 6,611,029 km (0.109 R)
• M34: 7,392,528 km (0.076 R)
• M35: 7,713,416 km (0.095 R)
• M36: 7,814,694 km (0.118 R)
• M37: 8,451,980 km (0.102 R)
• M38: 8,999,509 km (0.098 R)
• M39: 9,471,640 km (0.093 R)
• M40: 9,601,939 km (0.1 R)
• M41: 9,776,370 km (0.101 R)
• M42: 9,974,139 km (0.112 R)
• M43: 10,150,814 km (0.05 R)
• M44: 10,217,385 km (0.053 R)
• M45: 10,574,924 km (0.043 R)
• M46: 10,845,696 km (0.118 R)
• M47: 11,095,973 km (0.109 R)
• M48: 11,164,489 km (0.106 R)
• M49: 11,463,386 km (0.086 R)
• M50: 11,695,113 km (0.046 R)
• M51: 12,186,691 km (0.082 R)
• M52: 12,423,206 km (0.087 R)
• M53: 12,518,350 km (0.077 R)
• M54: 12,709,087 km (0.058 R)
• M55: 13,579,597 km (0.085 R)
• M56: 14,071,475 km (0.067 R)
• M57: 14,319,658 km (0.106 R)
• M58: 14,694,550 km (0.078 R)
• M59: 14,921,041 km (0.086 R)
• M60: 15,530,802 km (0.112 R)
• M61: 15,658,858 km (0.066 R)
• M62: 15,916,166 km (0.075 R)
• M63: 16,304,522 km (0.102 R)
• M64: 16,382,612 km (0.084 R)
• M65: 16,669,840 km (0.108 R)
• M66: 17,038,001 km (0.099 R)
• M67: 17,223,053 km (0.046 R)
• M68: 17,382,076 km (0.086 R)
• M69: 17,568,475 km (0.079 R)
• M70: 17,782,100 km (0.078 R)
• M71: 17,996,624 km (0.093 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.28 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 821.2

Radius: 13.3

Gravity: 4.64 G

Time & Orbit

Eccentricity (e): 0.196

Orbit Range: 1.83 AU - 2.73 AU

Year: 2420 Days

Day: 10.9 Hours

Environment

Temp: -199 °C

Axial Tilt: 33.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 17,043,776 km

• M1: 197,918 km (0.099 R)
• M2: 468,092 km (0.106 R)
• M3: 617,390 km (0.102 R)
• M4: 842,086 km (0.119 R)
• M5: 940,073 km (0.084 R)
• M6: 1,073,963 km (0.06 R)
• M7: 1,225,805 km (0.048 R)
• M8: 1,479,673 km (0.078 R)
• M9: 1,588,580 km (0.089 R)
• M10: 1,763,759 km (0.116 R)
• M11: 2,188,766 km (0.103 R)
• M12: 2,442,185 km (0.119 R)
• M13: 2,543,313 km (0.095 R)
• M14: 2,660,748 km (0.091 R)
• M15: 2,825,156 km (0.063 R)
• M16: 3,164,593 km (0.106 R)
• M17: 3,307,160 km (0.062 R)
• M18: 3,403,501 km (0.086 R)
• M19: 3,764,930 km (0.102 R)
• M20: 3,848,854 km (0.107 R)
• M21: 3,950,431 km (0.06 R)
• M22: 4,668,351 km (0.056 R)
• M23: 4,941,218 km (0.111 R)
• M24: 5,144,671 km (0.042 R)
• M25: 5,238,020 km (0.101 R)
• M26: 5,579,103 km (0.055 R)
• M27: 5,733,039 km (0.117 R)
• M28: 5,868,874 km (0.088 R)
• M29: 6,263,064 km (0.088 R)
• M30: 6,645,586 km (0.099 R)
• M31: 7,118,914 km (0.053 R)
• M32: 7,433,518 km (0.118 R)
• M33: 7,795,545 km (0.088 R)
• M34: 7,946,340 km (0.07 R)
• M35: 8,120,023 km (0.068 R)
• M36: 8,426,698 km (0.09 R)
• M37: 8,692,683 km (0.073 R)
• M38: 8,804,433 km (0.044 R)
• M39: 9,210,292 km (0.114 R)
• M40: 9,553,320 km (0.099 R)
• M41: 10,064,197 km (0.077 R)
• M42: 10,181,481 km (0.072 R)
• M43: 10,275,579 km (0.1 R)
• M44: 10,370,124 km (0.025 R)
• M45: 10,488,606 km (0.091 R)
• M46: 10,655,408 km (0.095 R)
• M47: 10,751,001 km (0.099 R)
• M48: 10,919,149 km (0.083 R)
• M49: 11,039,724 km (0.093 R)
• M50: 11,501,982 km (0.11 R)
• M51: 11,624,802 km (0.095 R)
• M52: 12,420,662 km (0.094 R)
• M53: 12,749,030 km (0.086 R)
• M54: 13,003,496 km (0.103 R)
• M55: 13,362,830 km (0.075 R)
• M56: 13,517,664 km (0.033 R)
• M57: 13,621,335 km (0.114 R)
• M58: 15,126,888 km (0.117 R)
• M59: 15,558,927 km (0.102 R)
• M60: 15,885,798 km (0.088 R)
• M61: 16,435,420 km (0.09 R)
• M62: 16,823,777 km (0.104 R)
• M63: 17,384,021 km (0.086 R)
• M64: 17,751,583 km (0.11 R)
• M65: 18,007,395 km (0.089 R)
• M66: 18,264,554 km (0.107 R)
• M67: 18,379,146 km (0.112 R)
• M68: 18,580,504 km (0.104 R)
• M69: 19,480,485 km (0.063 R)

Asteroid Belt

Center: 2.66 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 6 - Gas Giant

Semi-Major Axis: 3.03 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 351.6

Radius: 10.7

Gravity: 3.07 G

Time & Orbit

Eccentricity (e): 0.209

Orbit Range: 2.4 AU - 3.66 AU

Year: 3707 Days

Day: 6.9 Hours

Environment

Temp: -205 °C

Axial Tilt: 16.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 17,043,776 km

• M1: 267,481 km (0.115 R)
• M2: 353,051 km (0.04 R)
• M3: 655,388 km (0.077 R)
• M4: 736,620 km (0.12 R)
• M5: 841,039 km (0.101 R)
• M6: 940,671 km (0.042 R)
• M7: 1,034,020 km (0.068 R)
• M8: 1,185,713 km (0.098 R)
• M9: 1,711,250 km (0.115 R)
• M10: 1,840,203 km (0.08 R)
• M11: 1,972,448 km (0.087 R)
• M12: 2,053,380 km (0.098 R)
• M13: 2,135,510 km (0.108 R)
• M14: 2,562,761 km (0.11 R)
• M15: 2,726,122 km (0.112 R)
• M16: 2,816,778 km (0.098 R)
• M17: 3,032,349 km (0.112 R)
• M18: 3,285,169 km (0.096 R)
• M19: 3,398,116 km (0.115 R)
• M20: 3,744,435 km (0.088 R)
• M21: 3,828,658 km (0.049 R)
• M22: 4,102,273 km (0.073 R)
• M23: 4,560,790 km (0.106 R)
• M24: 5,392,554 km (0.11 R)
• M25: 5,603,039 km (0.072 R)
• M26: 6,250,797 km (0.099 R)
• M27: 6,757,336 km (0.11 R)
• M28: 7,046,808 km (0.051 R)
• M29: 7,446,234 km (0.106 R)
• M30: 7,896,374 km (0.104 R)
• M31: 8,201,404 km (0.109 R)
• M32: 8,333,200 km (0.084 R)
• M33: 8,643,765 km (0.048 R)
• M34: 8,710,785 km (0.073 R)
• M35: 8,800,544 km (0.119 R)
• M36: 8,868,012 km (0.03 R)
• M37: 8,980,809 km (0.119 R)
• M38: 9,207,749 km (0.065 R)
• M39: 9,690,800 km (0.097 R)
• M40: 10,017,373 km (0.091 R)
• M41: 10,252,989 km (0.065 R)
• M42: 10,681,587 km (0.12 R)
• M43: 10,970,461 km (0.029 R)
• M44: 11,043,165 km (0.093 R)
• M45: 11,877,772 km (0.102 R)
• M46: 11,977,254 km (0.105 R)
• M47: 12,227,382 km (0.104 R)
• M48: 13,167,605 km (0.12 R)
• M49: 13,425,661 km (0.091 R)
• M50: 13,555,362 km (0.12 R)
• M51: 13,946,860 km (0.112 R)
• M52: 14,262,811 km (0.1 R)
• M53: 14,607,783 km (0.057 R)
• M54: 14,741,225 km (0.117 R)
• M55: 14,874,965 km (0.108 R)
• M56: 15,251,802 km (0.109 R)
• M57: 15,550,100 km (0.05 R)
• M58: 16,345,811 km (0.085 R)
• M59: 16,512,164 km (0.06 R)
• M60: 16,818,391 km (0.101 R)
• M61: 17,352,007 km (0.059 R)
• M62: 17,464,953 km (0.068 R)
• M63: 17,635,046 km (0.026 R)
• M64: 17,720,167 km (0.061 R)
• M65: 17,919,581 km (0.082 R)
• M66: 18,119,743 km (0.086 R)
• M67: 18,205,762 km (0.108 R)
• M68: 18,522,161 km (0.113 R)
• M69: 18,695,545 km (0.105 R)
• M70: 18,985,765 km (0.118 R)
• M71: 19,541,222 km (0.096 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 207.2

Radius: 8.9

Gravity: 2.62 G

Time & Orbit

Eccentricity (e): 0.016

Orbit Range: 3.06 AU - 3.16 AU

Year: 3855 Days

Day: 8.5 Hours

Environment

Temp: -215 °C

Axial Tilt: 4.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (64)

Outer Limit: 17,043,776 km

• M1: 207,642 km (0.09 R)
• M2: 294,409 km (0.086 R)
• M3: 365,767 km (0.103 R)
• M4: 472,430 km (0.092 R)
• M5: 670,498 km (0.102 R)
• M6: 823,387 km (0.068 R)
• M7: 895,194 km (0.116 R)
• M8: 1,436,289 km (0.047 R)
• M9: 1,647,970 km (0.06 R)
• M10: 1,751,941 km (0.091 R)
• M11: 1,822,401 km (0.025 R)
• M12: 1,966,314 km (0.073 R)
• M13: 2,089,134 km (0.102 R)
• M14: 2,252,794 km (0.046 R)
• M15: 2,459,987 km (0.096 R)
• M16: 3,075,882 km (0.1 R)
• M17: 3,132,879 km (0.084 R)
• M18: 3,233,558 km (0.073 R)
• M19: 3,306,113 km (0.088 R)
• M20: 4,108,556 km (0.039 R)
• M21: 4,426,601 km (0.073 R)
• M22: 4,785,785 km (0.055 R)
• M23: 5,205,258 km (0.101 R)
• M24: 5,724,213 km (0.09 R)
• M25: 5,865,433 km (0.068 R)
• M26: 5,954,294 km (0.1 R)
• M27: 6,205,469 km (0.086 R)
• M28: 6,405,332 km (0.11 R)
• M29: 6,515,286 km (0.069 R)
• M30: 7,225,727 km (0.105 R)
• M31: 7,282,873 km (0.099 R)
• M32: 7,590,297 km (0.105 R)
• M33: 7,726,132 km (0.086 R)
• M34: 8,039,539 km (0.107 R)
• M35: 8,098,780 km (0.09 R)
• M36: 8,397,228 km (0.114 R)
• M37: 9,189,947 km (0.108 R)
• M38: 9,314,113 km (0.064 R)
• M39: 9,376,346 km (0.083 R)
• M40: 9,522,054 km (0.093 R)
• M41: 9,668,660 km (0.109 R)
• M42: 9,900,537 km (0.038 R)
• M43: 10,176,844 km (0.026 R)
• M44: 10,241,021 km (0.106 R)
• M45: 10,477,386 km (0.094 R)
• M46: 10,542,162 km (0.102 R)
• M47: 11,241,233 km (0.092 R)
• M48: 11,418,506 km (0.105 R)
• M49: 11,663,548 km (0.054 R)
• M50: 12,546,474 km (0.094 R)
• M51: 12,638,178 km (0.099 R)
• M52: 13,568,228 km (0.079 R)
• M53: 13,638,987 km (0.052 R)
• M54: 13,922,775 km (0.068 R)
• M55: 14,041,555 km (0.072 R)
• M56: 14,136,849 km (0.091 R)
• M57: 14,280,164 km (0.115 R)
• M58: 14,496,183 km (0.07 R)
• M59: 14,689,015 km (0.111 R)
• M60: 15,052,987 km (0.084 R)
• M61: 15,666,188 km (0.039 R)
• M62: 16,038,089 km (0.055 R)
• M63: 16,237,502 km (0.056 R)
• M64: 16,387,699 km (0.109 R)

Kuiper Belt

Range: 30 - 59 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 181 - 14,135 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit