🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.59 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 171.8

Radius: 12.4

Gravity: 1.12 G

Time & Orbit

Eccentricity (e): 0.141

Orbit Range: 0.51 AU - 0.67 AU

Year: 302 Days

Day: 8.3 Hours

Environment

Temp: -154 °C

Axial Tilt: 115.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (25)

Outer Limit: 23,950,932 km

• M1: 158,873 km (0.082 R)
• M2: 248,781 km (0.12 R)
• M3: 332,107 km (0.076 R)
• M4: 436,975 km (0.045 R)
• M5: 559,346 km (0.067 R)
• M6: 688,150 km (0.05 R)
• M7: 825,780 km (0.117 R)
• M8: 929,452 km (0.112 R)
• M9: 1,049,579 km (0.09 R)
• M10: 1,157,289 km (0.046 R)
• M11: 1,269,039 km (0.103 R)
• M12: 1,372,112 km (0.11 R)
• M13: 1,458,579 km (0.088 R)
• M14: 1,576,911 km (0.086 R)
• M15: 1,705,416 km (0.103 R)
• M16: 1,865,934 km (0.105 R)
• M17: 1,984,266 km (0.084 R)
• M18: 2,075,670 km (0.088 R)
• M19: 2,168,571 km (0.063 R)
• M20: 2,247,708 km (0.106 R)
• M21: 2,381,897 km (0.103 R)
• M22: 2,459,688 km (0.111 R)
• M23: 2,606,145 km (0.112 R)
• M24: 2,694,557 km (0.106 R)
• M25: 2,829,195 km (0.035 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.66 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 192.9

Radius: 13.1

Gravity: 1.12 G

Time & Orbit

Eccentricity (e): 0.214

Orbit Range: 0.52 AU - 0.8 AU

Year: 358 Days

Day: 14 Hours

Environment

Temp: -150 °C

Axial Tilt: 17.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (25)

Outer Limit: 23,950,932 km

• M1: 182,360 km (0.101 R)
• M2: 325,824 km (0.089 R)
• M3: 414,984 km (0.06 R)
• M4: 551,867 km (0.034 R)
• M5: 664,813 km (0.078 R)
• M6: 753,375 km (0.085 R)
• M7: 841,039 km (0.087 R)
• M8: 950,694 km (0.059 R)
• M9: 1,139,786 km (0.07 R)
• M10: 1,239,418 km (0.098 R)
• M11: 1,422,825 km (0.107 R)
• M12: 1,509,143 km (0.101 R)
• M13: 1,615,807 km (0.082 R)
• M14: 1,778,868 km (0.081 R)
• M15: 1,915,750 km (0.051 R)
• M16: 2,150,769 km (0.103 R)
• M17: 2,271,943 km (0.089 R)
• M18: 2,378,157 km (0.109 R)
• M19: 2,490,655 km (0.104 R)
• M20: 2,591,634 km (0.096 R)
• M21: 2,698,446 km (0.046 R)
• M22: 2,816,030 km (0.102 R)
• M23: 2,925,985 km (0.092 R)
• M24: 3,140,957 km (0.101 R)
• M25: 3,240,888 km (0.111 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.93 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 504.6

Radius: 9.1

Gravity: 6.09 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 0.86 AU - 1 AU

Year: 598 Days

Day: 13.8 Hours

Environment

Temp: -170 °C

Axial Tilt: 31.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (49)

Outer Limit: 23,950,932 km

• M1: 143,614 km (0.077 R)
• M2: 241,451 km (0.116 R)
• M3: 397,332 km (0.043 R)
• M4: 581,337 km (0.063 R)
• M5: 712,684 km (0.117 R)
• M6: 835,654 km (0.104 R)
• M7: 956,080 km (0.072 R)
• M8: 1,046,437 km (0.1 R)
• M9: 1,118,992 km (0.056 R)
• M10: 1,182,422 km (0.057 R)
• M11: 1,241,812 km (0.11 R)
• M12: 1,346,830 km (0.057 R)
• M13: 1,460,524 km (0.05 R)
• M14: 1,554,023 km (0.094 R)
• M15: 1,777,971 km (0.099 R)
• M16: 1,852,919 km (0.116 R)
• M17: 2,018,823 km (0.098 R)
• M18: 2,110,377 km (0.043 R)
• M19: 2,183,231 km (0.106 R)
• M20: 2,297,524 km (0.1 R)
• M21: 2,420,793 km (0.109 R)
• M22: 2,490,206 km (0.108 R)
• M23: 2,673,912 km (0.054 R)
• M24: 2,731,358 km (0.118 R)
• M25: 2,818,274 km (0.088 R)
• M26: 2,980,139 km (0.096 R)
• M27: 3,047,159 km (0.113 R)
• M28: 3,122,407 km (0.108 R)
• M29: 3,220,992 km (0.033 R)
• M30: 3,312,994 km (0.12 R)
• M31: 3,499,693 km (0.085 R)
• M32: 3,594,388 km (0.098 R)
• M33: 3,721,845 km (0.104 R)
• M34: 3,842,870 km (0.115 R)
• M35: 3,973,319 km (0.087 R)
• M36: 4,180,213 km (0.06 R)
• M37: 4,416,129 km (0.116 R)
• M38: 4,535,658 km (0.12 R)
• M39: 4,734,473 km (0.09 R)
• M40: 4,813,162 km (0.105 R)
• M41: 5,293,820 km (0.099 R)
• M42: 5,530,932 km (0.09 R)
• M43: 5,724,811 km (0.103 R)
• M44: 5,874,110 km (0.094 R)
• M45: 6,091,027 km (0.084 R)
• M46: 6,253,041 km (0.11 R)
• M47: 6,349,083 km (0.109 R)
• M48: 6,406,978 km (0.043 R)
• M49: 6,591,133 km (0.078 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 434.6

Radius: 12.6

Gravity: 2.74 G

Time & Orbit

Eccentricity (e): 0.042

Orbit Range: 1.06 AU - 1.16 AU

Year: 780 Days

Day: 6.6 Hours

Environment

Temp: -190 °C

Axial Tilt: 31.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 23,950,932 km

• M1: 156,928 km (0.03 R)
• M2: 284,386 km (0.064 R)
• M3: 400,025 km (0.108 R)
• M4: 521,797 km (0.063 R)
• M5: 742,454 km (0.115 R)
• M6: 829,969 km (0.107 R)
• M7: 947,553 km (0.118 R)
• M8: 1,065,885 km (0.088 R)
• M9: 1,259,016 km (0.088 R)
• M10: 1,451,997 km (0.109 R)
• M11: 1,545,795 km (0.086 R)
• M12: 1,648,419 km (0.104 R)
• M13: 1,740,122 km (0.063 R)
• M14: 1,881,044 km (0.084 R)
• M15: 2,117,558 km (0.102 R)
• M16: 2,246,960 km (0.114 R)
• M17: 2,453,405 km (0.069 R)
• M18: 2,673,912 km (0.062 R)
• M19: 2,893,223 km (0.096 R)
• M20: 3,037,286 km (0.105 R)
• M21: 3,159,357 km (0.112 R)
• M22: 3,258,092 km (0.12 R)
• M23: 3,374,778 km (0.074 R)
• M24: 3,492,811 km (0.116 R)
• M25: 3,595,136 km (0.074 R)
• M26: 3,689,831 km (0.034 R)
• M27: 3,908,095 km (0.052 R)
• M28: 4,239,155 km (0.068 R)
• M29: 4,320,985 km (0.093 R)
• M30: 4,504,990 km (0.106 R)
• M31: 4,644,715 km (0.092 R)
• M32: 4,957,225 km (0.113 R)
• M33: 5,043,692 km (0.115 R)
• M34: 5,179,078 km (0.045 R)
• M35: 5,276,616 km (0.061 R)
• M36: 5,493,383 km (0.118 R)
• M37: 5,572,969 km (0.1 R)
• M38: 5,662,878 km (0.087 R)
• M39: 5,793,776 km (0.08 R)
• M40: 5,996,930 km (0.114 R)
• M41: 6,109,727 km (0.106 R)
• M42: 6,316,770 km (0.098 R)
• M43: 6,801,467 km (0.099 R)
• M44: 6,908,430 km (0.038 R)
• M45: 7,167,683 km (0.075 R)
• M46: 7,331,193 km (0.102 R)
• M47: 7,451,919 km (0.107 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 595.4

Radius: 12.2

Gravity: 4 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 1.17 AU - 1.87 AU

Year: 1250 Days

Day: 6.3 Hours

Environment

Temp: -188 °C

Axial Tilt: 33.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (57)

Outer Limit: 23,950,932 km

• M1: 153,637 km (0.057 R)
• M2: 274,063 km (0.085 R)
• M3: 397,482 km (0.072 R)
• M4: 482,154 km (0.109 R)
• M5: 597,494 km (0.093 R)
• M6: 853,605 km (0.097 R)
• M7: 1,056,759 km (0.058 R)
• M8: 1,160,879 km (0.111 R)
• M9: 1,445,265 km (0.085 R)
• M10: 1,545,196 km (0.075 R)
• M11: 1,647,521 km (0.052 R)
• M12: 1,859,352 km (0.079 R)
• M13: 1,968,708 km (0.068 R)
• M14: 2,052,184 km (0.101 R)
• M15: 2,319,814 km (0.076 R)
• M16: 2,398,353 km (0.065 R)
• M17: 2,508,008 km (0.031 R)
• M18: 2,773,694 km (0.116 R)
• M19: 2,920,749 km (0.029 R)
• M20: 3,006,020 km (0.109 R)
• M21: 3,321,970 km (0.103 R)
• M22: 3,512,259 km (0.033 R)
• M23: 3,660,211 km (0.076 R)
• M24: 3,787,070 km (0.105 R)
• M25: 3,938,912 km (0.061 R)
• M26: 4,140,719 km (0.1 R)
• M27: 4,260,847 km (0.072 R)
• M28: 4,616,291 km (0.098 R)
• M29: 5,135,396 km (0.047 R)
• M30: 5,540,208 km (0.099 R)
• M31: 5,646,272 km (0.085 R)
• M32: 5,753,235 km (0.097 R)
• M33: 5,941,878 km (0.098 R)
• M34: 6,064,249 km (0.071 R)
• M35: 6,201,131 km (0.069 R)
• M36: 6,297,622 km (0.108 R)
• M37: 6,590,235 km (0.06 R)
• M38: 7,073,287 km (0.092 R)
• M39: 7,203,137 km (0.105 R)
• M40: 7,304,714 km (0.109 R)
• M41: 7,479,894 km (0.066 R)
• M42: 7,671,229 km (0.107 R)
• M43: 7,923,900 km (0.07 R)
• M44: 8,104,016 km (0.089 R)
• M45: 8,590,807 km (0.083 R)
• M46: 9,040,199 km (0.083 R)
• M47: 9,118,439 km (0.11 R)
• M48: 9,736,727 km (0.108 R)
• M49: 9,994,335 km (0.101 R)
• M50: 10,075,267 km (0.065 R)
• M51: 10,237,880 km (0.096 R)
• M52: 10,631,621 km (0.071 R)
• M53: 10,847,042 km (0.079 R)
• M54: 10,963,579 km (0.026 R)
• M55: 11,063,810 km (0.11 R)
• M56: 11,214,904 km (0.087 R)
• M57: 11,400,255 km (0.113 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 329.2

Radius: 8.8

Gravity: 4.25 G

Time & Orbit

Eccentricity (e): 0.065

Orbit Range: 1.84 AU - 2.1 AU

Year: 1844 Days

Day: 7.1 Hours

Environment

Temp: -209 °C

Axial Tilt: 12.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 23,950,932 km

• M1: 113,694 km (0.05 R)
• M2: 178,470 km (0.059 R)
• M3: 286,630 km (0.068 R)
• M4: 342,280 km (0.088 R)
• M5: 473,627 km (0.081 R)
• M6: 591,809 km (0.111 R)
• M7: 727,345 km (0.107 R)
• M8: 873,652 km (0.049 R)
• M9: 1,029,981 km (0.052 R)
• M10: 1,123,480 km (0.116 R)
• M11: 1,220,120 km (0.108 R)
• M12: 1,277,715 km (0.115 R)
• M13: 1,336,358 km (0.12 R)
• M14: 1,465,162 km (0.076 R)
• M15: 1,753,736 km (0.097 R)
• M16: 2,099,905 km (0.048 R)
• M17: 2,210,009 km (0.087 R)
• M18: 2,342,703 km (0.109 R)
• M19: 2,573,233 km (0.042 R)
• M20: 2,691,415 km (0.075 R)
• M21: 2,767,411 km (0.111 R)
• M22: 2,933,016 km (0.105 R)
• M23: 3,000,036 km (0.06 R)
• M24: 3,285,468 km (0.068 R)
• M25: 3,413,823 km (0.077 R)
• M26: 3,663,502 km (0.111 R)
• M27: 4,043,032 km (0.099 R)
• M28: 4,142,963 km (0.091 R)
• M29: 4,231,226 km (0.051 R)
• M30: 4,486,590 km (0.111 R)
• M31: 4,799,848 km (0.096 R)
• M32: 5,120,137 km (0.088 R)
• M33: 5,502,658 km (0.116 R)
• M34: 5,613,660 km (0.12 R)
• M35: 5,739,472 km (0.058 R)
• M36: 5,795,721 km (0.105 R)
• M37: 5,922,879 km (0.052 R)
• M38: 6,022,361 km (0.107 R)
• M39: 6,324,400 km (0.087 R)
• M40: 6,675,506 km (0.039 R)
• M41: 6,808,797 km (0.115 R)
• M42: 6,988,016 km (0.094 R)
• M43: 7,229,317 km (0.11 R)
• M44: 7,366,349 km (0.109 R)
• M45: 7,550,354 km (0.093 R)
• M46: 8,079,781 km (0.119 R)
• M47: 8,301,335 km (0.074 R)
• M48: 8,365,064 km (0.082 R)
• M49: 8,508,828 km (0.111 R)
• M50: 8,605,318 km (0.11 R)
• M51: 8,994,273 km (0.078 R)
• M52: 9,076,103 km (0.108 R)
• M53: 9,339,545 km (0.096 R)
• M54: 9,455,483 km (0.115 R)
• M55: 9,722,515 km (0.085 R)
• M56: 10,144,830 km (0.055 R)
• M57: 10,212,897 km (0.04 R)
• M58: 10,521,368 km (0.088 R)
• M59: 10,989,609 km (0.076 R)
• M60: 11,235,249 km (0.115 R)
• M61: 11,447,079 km (0.077 R)
• M62: 11,821,224 km (0.072 R)
• M63: 12,108,900 km (0.074 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.18 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 504.4

Radius: 8

Gravity: 7.88 G

Time & Orbit

Eccentricity (e): 0.041

Orbit Range: 2.09 AU - 2.27 AU

Year: 2146 Days

Day: 15 Hours

Environment

Temp: -213 °C

Axial Tilt: 27.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 23,950,932 km

• M1: 100,829 km (0.115 R)
• M2: 167,849 km (0.027 R)
• M3: 292,913 km (0.056 R)
• M4: 343,327 km (0.106 R)
• M5: 474,824 km (0.071 R)
• M6: 685,158 km (0.088 R)
• M7: 740,360 km (0.094 R)
• M8: 797,207 km (0.054 R)
• M9: 942,018 km (0.051 R)
• M10: 1,086,230 km (0.036 R)
• M11: 1,161,179 km (0.098 R)
• M12: 1,296,565 km (0.118 R)
• M13: 1,416,841 km (0.108 R)
• M14: 1,551,480 km (0.1 R)
• M15: 1,647,222 km (0.102 R)
• M16: 1,755,980 km (0.092 R)
• M17: 1,822,252 km (0.115 R)
• M18: 1,980,526 km (0.104 R)
• M19: 2,250,550 km (0.119 R)
• M20: 2,747,664 km (0.098 R)
• M21: 2,799,275 km (0.071 R)
• M22: 3,062,119 km (0.099 R)
• M23: 3,291,901 km (0.076 R)
• M24: 3,402,005 km (0.107 R)
• M25: 3,625,804 km (0.066 R)
• M26: 3,782,433 km (0.099 R)
• M27: 3,868,900 km (0.12 R)
• M28: 4,221,203 km (0.101 R)
• M29: 4,296,002 km (0.075 R)
• M30: 4,461,906 km (0.074 R)
• M31: 4,553,310 km (0.034 R)
• M32: 4,676,130 km (0.106 R)
• M33: 5,003,899 km (0.083 R)
• M34: 5,226,650 km (0.093 R)
• M35: 5,371,461 km (0.085 R)
• M36: 5,847,332 km (0.053 R)
• M37: 5,897,298 km (0.104 R)
• M38: 6,014,582 km (0.077 R)
• M39: 6,115,711 km (0.119 R)
• M40: 6,166,424 km (0.06 R)
• M41: 6,234,342 km (0.095 R)
• M42: 6,595,022 km (0.095 R)
• M43: 6,681,938 km (0.11 R)
• M44: 6,769,154 km (0.067 R)
• M45: 6,874,321 km (0.066 R)
• M46: 7,354,531 km (0.103 R)
• M47: 7,827,260 km (0.094 R)
• M48: 7,937,813 km (0.057 R)
• M49: 8,048,814 km (0.077 R)
• M50: 8,104,465 km (0.105 R)
• M51: 8,178,964 km (0.086 R)
• M52: 8,384,811 km (0.057 R)
• M53: 8,840,187 km (0.031 R)
• M54: 9,245,148 km (0.027 R)
• M55: 9,342,537 km (0.074 R)
• M56: 9,479,419 km (0.092 R)
• M57: 9,774,874 km (0.064 R)
• M58: 10,153,507 km (0.106 R)
• M59: 10,334,520 km (0.116 R)
• M60: 10,802,013 km (0.029 R)
• M61: 11,359,565 km (0.064 R)
• M62: 12,160,213 km (0.062 R)
• M63: 12,395,380 km (0.058 R)
• M64: 12,459,707 km (0.068 R)
• M65: 12,632,044 km (0.081 R)
• M66: 12,783,437 km (0.112 R)
• M67: 12,957,120 km (0.041 R)
• M68: 13,109,860 km (0.05 R)
• M69: 13,197,375 km (0.102 R)
• M70: 13,770,933 km (0.05 R)
• M71: 13,837,653 km (0.048 R)
• M72: 14,172,753 km (0.11 R)
• M73: 14,465,366 km (0.116 R)
• M74: 14,942,434 km (0.092 R)
• M75: 15,516,890 km (0.072 R)

Planet 8 - Gas Giant

Semi-Major Axis: 3.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 433.2

Radius: 11

Gravity: 3.58 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 3.32 AU - 3.76 AU

Year: 4442 Days

Day: 11.3 Hours

Environment

Temp: -217 °C

Axial Tilt: 33 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 23,950,932 km

• M1: 266,733 km (0.083 R)
• M2: 444,006 km (0.1 R)
• M3: 606,470 km (0.069 R)
• M4: 801,396 km (0.039 R)
• M5: 1,397,693 km (0.116 R)
• M6: 1,940,284 km (0.086 R)
• M7: 2,109,031 km (0.117 R)
• M8: 2,218,985 km (0.088 R)
• M9: 2,331,034 km (0.047 R)
• M10: 2,412,116 km (0.086 R)
• M11: 2,849,690 km (0.105 R)
• M12: 3,275,745 km (0.095 R)
• M13: 3,440,751 km (0.099 R)
• M14: 3,571,051 km (0.116 R)
• M15: 3,913,630 km (0.077 R)
• M16: 4,610,307 km (0.112 R)
• M17: 4,754,220 km (0.077 R)
• M18: 5,539,908 km (0.089 R)
• M19: 5,649,264 km (0.112 R)
• M20: 5,847,781 km (0.101 R)
• M21: 5,936,791 km (0.092 R)
• M22: 6,071,280 km (0.106 R)
• M23: 6,297,472 km (0.108 R)
• M24: 6,480,430 km (0.111 R)
• M25: 6,992,653 km (0.043 R)
• M26: 7,134,771 km (0.086 R)
• M27: 7,229,915 km (0.076 R)
• M28: 7,301,573 km (0.04 R)
• M29: 7,785,672 km (0.079 R)
• M30: 7,908,192 km (0.073 R)
• M31: 7,982,094 km (0.07 R)
• M32: 8,657,528 km (0.081 R)
• M33: 9,092,259 km (0.116 R)
• M34: 9,247,542 km (0.12 R)
• M35: 9,586,680 km (0.102 R)
• M36: 9,797,464 km (0.082 R)
• M37: 10,116,556 km (0.107 R)
• M38: 10,358,007 km (0.111 R)
• M39: 10,710,310 km (0.097 R)
• M40: 11,066,502 km (0.117 R)
• M41: 11,176,906 km (0.117 R)
• M42: 12,045,022 km (0.039 R)
• M43: 12,358,280 km (0.116 R)
• M44: 12,501,445 km (0.107 R)
• M45: 12,616,486 km (0.088 R)
• M46: 12,789,720 km (0.087 R)
• M47: 13,109,261 km (0.047 R)
• M48: 13,343,382 km (0.118 R)
• M49: 13,608,320 km (0.09 R)
• M50: 13,875,203 km (0.108 R)
• M51: 14,173,650 km (0.065 R)
• M52: 15,296,233 km (0.107 R)
• M53: 16,070,850 km (0.074 R)
• M54: 17,272,720 km (0.116 R)
• M55: 18,437,938 km (0.109 R)
• M56: 18,601,747 km (0.075 R)
• M57: 18,700,332 km (0.079 R)
• M58: 19,030,046 km (0.095 R)
• M59: 19,461,486 km (0.085 R)
• M60: 19,561,567 km (0.047 R)
• M61: 19,695,308 km (0.107 R)
• M62: 20,401,858 km (0.097 R)
• M63: 20,741,296 km (0.1 R)
• M64: 20,945,946 km (0.107 R)
• M65: 21,082,678 km (0.069 R)
• M66: 21,944,063 km (0.109 R)
• M67: 22,048,333 km (0.113 R)
• M68: 22,291,878 km (0.115 R)
• M69: 22,641,488 km (0.107 R)
• M70: 22,852,272 km (0.036 R)
• M71: 23,169,419 km (0.052 R)
• M72: 23,417,153 km (0.098 R)
• M73: 23,488,062 km (0.069 R)
• M74: 23,701,389 km (0.11 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 236 - 11,983 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit