🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.64 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.22

Radius: 1.08

Gravity: 1.05 G

Time & Orbit

Eccentricity (e): 0.193

Orbit Range: 0.52 AU - 0.76 AU

Year: 336 Days

Day: 39.3 Hours

Environment

Temp: -142 °C

Axial Tilt: 45.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.67 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.66

Radius: 1.85

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.09

Orbit Range: 0.61 AU - 0.73 AU

Year: 360 Days

Day: 14.3 Hours

Environment

Temp: -138 °C

Axial Tilt: 33.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 36,241,376 km

• M1: 50,115 km (0.112 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.95 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 216.3

Radius: 12.1

Gravity: 1.48 G

Time & Orbit

Eccentricity (e): 0.22

Orbit Range: 0.74 AU - 1.16 AU

Year: 607 Days

Day: 12.2 Hours

Environment

Temp: -148 °C

Axial Tilt: 0.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (39)

Outer Limit: 36,241,376 km

• M1: 154,684 km (0.119 R)
• M2: 235,317 km (0.07 R)
• M3: 338,839 km (0.115 R)
• M4: 423,512 km (0.092 R)
• M5: 508,633 km (0.075 R)
• M6: 594,652 km (0.062 R)
• M7: 697,276 km (0.107 R)
• M8: 799,152 km (0.1 R)
• M9: 946,506 km (0.092 R)
• M10: 1,073,814 km (0.118 R)
• M11: 1,155,045 km (0.05 R)
• M12: 1,247,347 km (0.117 R)
• M13: 1,328,579 km (0.053 R)
• M14: 1,444,517 km (0.066 R)
• M15: 1,622,688 km (0.114 R)
• M16: 1,772,735 km (0.082 R)
• M17: 1,906,475 km (0.083 R)
• M18: 2,033,185 km (0.064 R)
• M19: 2,151,816 km (0.116 R)
• M20: 2,256,235 km (0.071 R)
• M21: 2,385,039 km (0.084 R)
• M22: 2,632,324 km (0.104 R)
• M23: 2,756,341 km (0.098 R)
• M24: 3,047,009 km (0.062 R)
• M25: 3,227,574 km (0.075 R)
• M26: 3,315,986 km (0.051 R)
• M27: 3,418,162 km (0.039 R)
• M28: 3,678,163 km (0.12 R)
• M29: 3,783,929 km (0.066 R)
• M30: 4,025,828 km (0.069 R)
• M31: 4,128,153 km (0.117 R)
• M32: 4,224,345 km (0.062 R)
• M33: 4,307,521 km (0.065 R)
• M34: 4,405,208 km (0.04 R)
• M35: 4,517,856 km (0.071 R)
• M36: 4,624,220 km (0.061 R)
• M37: 4,774,715 km (0.082 R)
• M38: 4,883,174 km (0.107 R)
• M39: 5,014,371 km (0.112 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 770.6

Radius: 13.6

Gravity: 4.17 G

Time & Orbit

Eccentricity (e): 0.15

Orbit Range: 0.92 AU - 1.24 AU

Year: 736 Days

Day: 14.3 Hours

Environment

Temp: -173 °C

Axial Tilt: 39.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (53)

Outer Limit: 36,241,376 km

• M1: 171,290 km (0.115 R)
• M2: 318,045 km (0.076 R)
• M3: 503,995 km (0.098 R)
• M4: 668,104 km (0.103 R)
• M5: 781,798 km (0.075 R)
• M6: 1,031,328 km (0.06 R)
• M7: 1,122,582 km (0.108 R)
• M8: 1,210,696 km (0.074 R)
• M9: 1,301,202 km (0.078 R)
• M10: 1,448,407 km (0.054 R)
• M11: 1,637,199 km (0.079 R)
• M12: 1,752,988 km (0.096 R)
• M13: 1,924,577 km (0.048 R)
• M14: 2,016,430 km (0.105 R)
• M15: 2,172,909 km (0.11 R)
• M16: 2,382,645 km (0.097 R)
• M17: 2,506,812 km (0.119 R)
• M18: 2,616,168 km (0.076 R)
• M19: 2,753,050 km (0.081 R)
• M20: 2,865,996 km (0.108 R)
• M21: 2,954,109 km (0.12 R)
• M22: 3,069,898 km (0.103 R)
• M23: 3,251,211 km (0.12 R)
• M24: 3,343,213 km (0.057 R)
• M25: 3,445,389 km (0.086 R)
• M26: 3,768,221 km (0.103 R)
• M27: 3,962,698 km (0.033 R)
• M28: 4,051,410 km (0.091 R)
• M29: 4,311,261 km (0.072 R)
• M30: 4,443,206 km (0.075 R)
• M31: 4,680,169 km (0.07 R)
• M32: 4,910,849 km (0.083 R)
• M33: 5,070,171 km (0.116 R)
• M34: 5,231,288 km (0.077 R)
• M35: 5,870,520 km (0.102 R)
• M36: 5,971,947 km (0.094 R)
• M37: 6,511,397 km (0.048 R)
• M38: 6,639,901 km (0.114 R)
• M39: 6,769,154 km (0.052 R)
• M40: 6,863,850 km (0.028 R)
• M41: 6,970,812 km (0.112 R)
• M42: 7,078,373 km (0.112 R)
• M43: 7,198,500 km (0.103 R)
• M44: 7,453,116 km (0.087 R)
• M45: 7,563,070 km (0.087 R)
• M46: 7,698,306 km (0.036 R)
• M47: 7,958,756 km (0.1 R)
• M48: 8,083,820 km (0.03 R)
• M49: 8,184,350 km (0.055 R)
• M50: 8,285,179 km (0.096 R)
• M51: 8,373,890 km (0.089 R)
• M52: 8,616,089 km (0.041 R)
• M53: 8,731,729 km (0.114 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 691

Radius: 10

Gravity: 6.91 G

Time & Orbit

Eccentricity (e): 0.187

Orbit Range: 0.89 AU - 1.29 AU

Year: 747 Days

Day: 9.3 Hours

Environment

Temp: -154 °C

Axial Tilt: 22 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 36,241,376 km

• M1: 131,497 km (0.105 R)
• M2: 196,721 km (0.063 R)
• M3: 260,300 km (0.089 R)
• M4: 418,276 km (0.039 R)
• M5: 573,708 km (0.053 R)
• M6: 728,691 km (0.084 R)
• M7: 836,402 km (0.079 R)
• M8: 1,038,658 km (0.114 R)
• M9: 1,105,678 km (0.118 R)
• M10: 1,276,519 km (0.045 R)
• M11: 1,525,150 km (0.096 R)
• M12: 1,595,012 km (0.049 R)
• M13: 1,702,125 km (0.104 R)
• M14: 1,789,490 km (0.103 R)
• M15: 2,115,015 km (0.114 R)
• M16: 2,369,780 km (0.072 R)
• M17: 2,761,726 km (0.1 R)
• M18: 2,839,218 km (0.091 R)
• M19: 2,961,140 km (0.095 R)
• M20: 3,075,882 km (0.101 R)
• M21: 3,210,370 km (0.119 R)
• M22: 3,291,901 km (0.101 R)
• M23: 3,355,779 km (0.096 R)
• M24: 3,438,657 km (0.091 R)
• M25: 3,979,004 km (0.049 R)
• M26: 4,106,013 km (0.108 R)
• M27: 4,204,747 km (0.118 R)
• M28: 4,324,126 km (0.051 R)
• M29: 4,464,898 km (0.073 R)
• M30: 4,576,498 km (0.109 R)
• M31: 4,648,155 km (0.041 R)
• M32: 4,990,585 km (0.115 R)
• M33: 5,053,715 km (0.079 R)
• M34: 5,149,009 km (0.092 R)
• M35: 5,223,359 km (0.119 R)
• M36: 5,352,013 km (0.075 R)
• M37: 5,535,869 km (0.106 R)
• M38: 5,601,243 km (0.06 R)
• M39: 5,854,513 km (0.067 R)
• M40: 6,190,360 km (0.066 R)
• M41: 6,521,121 km (0.096 R)
• M42: 6,682,836 km (0.085 R)
• M43: 6,752,549 km (0.066 R)
• M44: 6,845,898 km (0.113 R)
• M45: 6,928,027 km (0.084 R)
• M46: 7,140,456 km (0.1 R)
• M47: 7,247,568 km (0.072 R)
• M48: 7,319,225 km (0.058 R)
• M49: 7,523,576 km (0.045 R)
• M50: 7,901,161 km (0.116 R)
• M51: 8,210,081 km (0.059 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.12 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 711.2

Radius: 8.3

Gravity: 10.32 G

Time & Orbit

Eccentricity (e): 0.052

Orbit Range: 1.06 AU - 1.18 AU

Year: 778 Days

Day: 11.6 Hours

Environment

Temp: -154 °C

Axial Tilt: 38.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (61)

Outer Limit: 36,241,376 km

• M1: 119,230 km (0.065 R)
• M2: 173,085 km (0.082 R)
• M3: 268,528 km (0.118 R)
• M4: 327,470 km (0.098 R)
• M5: 480,209 km (0.071 R)
• M6: 560,992 km (0.111 R)
• M7: 726,597 km (0.081 R)
• M8: 787,334 km (0.101 R)
• M9: 867,368 km (0.114 R)
• M10: 1,023,549 km (0.119 R)
• M11: 1,086,081 km (0.07 R)
• M12: 1,397,992 km (0.108 R)
• M13: 1,618,799 km (0.101 R)
• M14: 1,737,280 km (0.108 R)
• M15: 2,006,556 km (0.096 R)
• M16: 2,166,476 km (0.094 R)
• M17: 2,264,463 km (0.08 R)
• M18: 2,372,323 km (0.113 R)
• M19: 2,439,492 km (0.115 R)
• M20: 2,584,602 km (0.075 R)
• M21: 2,653,866 km (0.037 R)
• M22: 2,955,007 km (0.063 R)
• M23: 3,073,189 km (0.103 R)
• M24: 3,220,693 km (0.099 R)
• M25: 3,351,740 km (0.116 R)
• M26: 3,408,587 km (0.105 R)
• M27: 3,551,753 km (0.11 R)
• M28: 3,784,976 km (0.119 R)
• M29: 4,013,412 km (0.059 R)
• M30: 4,473,126 km (0.119 R)
• M31: 4,619,582 km (0.095 R)
• M32: 4,682,862 km (0.052 R)
• M33: 4,735,820 km (0.087 R)
• M34: 4,852,955 km (0.071 R)
• M35: 4,928,053 km (0.053 R)
• M36: 5,475,581 km (0.097 R)
• M37: 5,576,261 km (0.081 R)
• M38: 5,643,580 km (0.082 R)
• M39: 5,768,045 km (0.104 R)
• M40: 5,859,001 km (0.056 R)
• M41: 5,916,147 km (0.12 R)
• M42: 5,996,331 km (0.069 R)
• M43: 6,158,047 km (0.06 R)
• M44: 6,286,103 km (0.1 R)
• M45: 6,415,056 km (0.078 R)
• M46: 6,497,484 km (0.105 R)
• M47: 6,675,506 km (0.119 R)
• M48: 6,807,002 km (0.093 R)
• M49: 6,879,258 km (0.069 R)
• M50: 7,109,340 km (0.062 R)
• M51: 7,428,282 km (0.105 R)
• M52: 7,502,632 km (0.092 R)
• M53: 7,626,948 km (0.105 R)
• M54: 7,714,313 km (0.113 R)
• M55: 7,789,561 km (0.049 R)
• M56: 7,928,238 km (0.063 R)
• M57: 8,258,999 km (0.112 R)
• M58: 8,464,846 km (0.032 R)
• M59: 8,542,338 km (0.09 R)
• M60: 8,646,308 km (0.117 R)
• M61: 8,711,383 km (0.053 R)

Planet 7 - Gas Giant

Semi-Major Axis: 1.44 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 199.9

Radius: 14.6

Gravity: 0.94 G

Time & Orbit

Eccentricity (e): 0.044

Orbit Range: 1.38 AU - 1.5 AU

Year: 1134 Days

Day: 13.5 Hours

Environment

Temp: -168 °C

Axial Tilt: 38.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (43)

Outer Limit: 36,241,376 km

• M1: 184,155 km (0.059 R)
• M2: 283,039 km (0.079 R)
• M3: 381,026 km (0.113 R)
• M4: 620,682 km (0.087 R)
• M5: 755,020 km (0.093 R)
• M6: 900,878 km (0.104 R)
• M7: 1,025,194 km (0.086 R)
• M8: 1,155,943 km (0.106 R)
• M9: 1,257,968 km (0.116 R)
• M10: 1,357,451 km (0.091 R)
• M11: 1,484,460 km (0.117 R)
• M12: 1,770,491 km (0.086 R)
• M13: 1,876,705 km (0.091 R)
• M14: 2,074,922 km (0.096 R)
• M15: 2,470,459 km (0.112 R)
• M16: 2,643,095 km (0.092 R)
• M17: 2,843,257 km (0.11 R)
• M18: 2,937,354 km (0.071 R)
• M19: 3,032,648 km (0.086 R)
• M20: 3,153,074 km (0.11 R)
• M21: 3,308,207 km (0.115 R)
• M22: 3,448,979 km (0.117 R)
• M23: 3,541,281 km (0.097 R)
• M24: 3,685,643 km (0.053 R)
• M25: 3,866,656 km (0.054 R)
• M26: 4,121,571 km (0.048 R)
• M27: 4,500,652 km (0.101 R)
• M28: 4,741,056 km (0.043 R)
• M29: 4,900,527 km (0.059 R)
• M30: 5,004,797 km (0.1 R)
• M31: 5,128,813 km (0.113 R)
• M32: 5,302,497 km (0.059 R)
• M33: 5,399,735 km (0.115 R)
• M34: 5,556,663 km (0.084 R)
• M35: 5,745,007 km (0.105 R)
• M36: 6,036,723 km (0.117 R)
• M37: 6,199,635 km (0.109 R)
• M38: 6,540,569 km (0.103 R)
• M39: 6,634,666 km (0.051 R)
• M40: 6,877,014 km (0.08 R)
• M41: 7,047,406 km (0.114 R)
• M42: 7,154,668 km (0.102 R)
• M43: 7,446,982 km (0.061 R)

Planet 8 - Gas Giant

Semi-Major Axis: 3.3 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 262.3

Radius: 10.4

Gravity: 2.43 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 3.19 AU - 3.41 AU

Year: 3933 Days

Day: 10.2 Hours

Environment

Temp: -210 °C

Axial Tilt: 33.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 36,241,376 km

• M1: 131,048 km (0.085 R)
• M2: 230,680 km (0.108 R)
• M3: 581,038 km (0.109 R)
• M4: 681,269 km (0.073 R)
• M5: 834,158 km (0.098 R)
• M6: 1,029,233 km (0.051 R)
• M7: 1,175,091 km (0.049 R)
• M8: 1,384,229 km (0.119 R)
• M9: 1,522,757 km (0.117 R)
• M10: 1,653,804 km (0.093 R)
• M11: 1,726,958 km (0.12 R)
• M12: 1,876,705 km (0.103 R)
• M13: 2,017,926 km (0.099 R)
• M14: 2,135,958 km (0.088 R)
• M15: 2,324,452 km (0.109 R)
• M16: 2,420,793 km (0.069 R)
• M17: 2,907,883 km (0.043 R)
• M18: 3,193,316 km (0.111 R)
• M19: 3,775,252 km (0.086 R)
• M20: 3,971,225 km (0.108 R)
• M21: 4,355,991 km (0.111 R)
• M22: 4,509,927 km (0.117 R)
• M23: 4,630,952 km (0.054 R)
• M24: 4,735,521 km (0.095 R)
• M25: 5,324,637 km (0.059 R)
• M26: 5,544,546 km (0.066 R)
• M27: 5,899,093 km (0.104 R)
• M28: 6,299,566 km (0.114 R)
• M29: 6,396,207 km (0.111 R)
• M30: 6,926,830 km (0.115 R)
• M31: 7,046,658 km (0.07 R)
• M32: 7,247,867 km (0.095 R)
• M33: 7,821,575 km (0.091 R)
• M34: 8,198,113 km (0.111 R)
• M35: 8,860,532 km (0.085 R)
• M36: 9,606,726 km (0.112 R)
• M37: 10,122,989 km (0.084 R)
• M38: 10,373,116 km (0.092 R)
• M39: 10,602,300 km (0.088 R)
• M40: 10,972,405 km (0.1 R)
• M41: 11,205,928 km (0.053 R)
• M42: 11,370,485 km (0.085 R)
• M43: 11,464,732 km (0.041 R)
• M44: 11,559,427 km (0.113 R)
• M45: 11,630,486 km (0.11 R)
• M46: 11,749,267 km (0.096 R)
• M47: 12,012,260 km (0.107 R)
• M48: 12,180,558 km (0.104 R)
• M49: 12,349,603 km (0.102 R)
• M50: 12,788,075 km (0.117 R)
• M51: 13,430,448 km (0.079 R)
• M52: 13,505,247 km (0.12 R)
• M53: 14,007,447 km (0.114 R)
• M54: 14,286,297 km (0.114 R)
• M55: 15,472,160 km (0.111 R)
• M56: 15,786,615 km (0.099 R)
• M57: 16,288,964 km (0.095 R)
• M58: 16,475,363 km (0.099 R)
• M59: 16,555,548 km (0.103 R)
• M60: 16,689,288 km (0.093 R)
• M61: 16,769,772 km (0.096 R)
• M62: 16,877,183 km (0.083 R)
• M63: 17,146,908 km (0.107 R)
• M64: 17,255,217 km (0.105 R)
• M65: 17,417,979 km (0.085 R)
• M66: 17,581,340 km (0.113 R)
• M67: 17,800,052 km (0.116 R)
• M68: 18,295,072 km (0.093 R)
• M69: 18,488,950 km (0.103 R)

Planet 9 - Ice Giant

Semi-Major Axis: 7.7 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 150.7

Radius: 7.6

Gravity: 2.61 G

Time & Orbit

Eccentricity (e): 0.077

Orbit Range: 7.11 AU - 8.29 AU

Year: 14017 Days

Day: 22.5 Hours

Environment

Temp: -219 °C

Axial Tilt: 7.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 36,241,376 km

• M1: 100,380 km (0.047 R)
• M2: 174,581 km (0.081 R)
• M3: 237,412 km (0.101 R)
• M4: 291,865 km (0.071 R)
• M5: 599,439 km (0.089 R)
• M6: 1,006,195 km (0.059 R)
• M7: 1,103,135 km (0.058 R)
• M8: 1,186,461 km (0.103 R)
• M9: 1,237,623 km (0.066 R)
• M10: 1,359,695 km (0.104 R)
• M11: 1,559,707 km (0.049 R)
• M12: 1,634,806 km (0.088 R)
• M13: 1,730,548 km (0.101 R)
• M14: 1,828,086 km (0.117 R)
• M15: 2,152,564 km (0.056 R)
• M16: 2,364,694 km (0.117 R)
• M17: 2,473,302 km (0.06 R)
• M18: 2,877,964 km (0.098 R)
• M19: 3,017,539 km (0.108 R)
• M20: 3,327,655 km (0.051 R)
• M21: 3,449,577 km (0.091 R)
• M22: 3,647,944 km (0.113 R)
• M23: 3,926,645 km (0.071 R)
• M24: 4,107,658 km (0.117 R)
• M25: 4,558,696 km (0.111 R)
• M26: 4,640,077 km (0.088 R)
• M27: 4,694,381 km (0.067 R)
• M28: 5,109,515 km (0.083 R)
• M29: 5,222,162 km (0.114 R)
• M30: 6,034,030 km (0.035 R)
• M31: 6,576,622 km (0.101 R)
• M32: 7,197,602 km (0.06 R)
• M33: 7,515,049 km (0.09 R)
• M34: 8,000,045 km (0.084 R)
• M35: 8,229,828 km (0.102 R)
• M36: 8,561,785 km (0.069 R)
• M37: 8,662,315 km (0.114 R)
• M38: 9,000,107 km (0.095 R)
• M39: 9,688,407 km (0.086 R)
• M40: 9,828,131 km (0.055 R)
• M41: 11,371,832 km (0.032 R)
• M42: 11,445,434 km (0.054 R)
• M43: 12,303,677 km (0.092 R)
• M44: 12,606,912 km (0.06 R)
• M45: 12,797,799 km (0.117 R)
• M46: 13,028,030 km (0.117 R)
• M47: 13,143,669 km (0.086 R)
• M48: 13,298,353 km (0.113 R)
• M49: 14,160,186 km (0.091 R)
• M50: 14,239,473 km (0.112 R)
• M51: 14,478,082 km (0.081 R)
• M52: 14,798,371 km (0.063 R)
• M53: 15,855,130 km (0.086 R)
• M54: 16,684,501 km (0.04 R)
• M55: 16,852,051 km (0.113 R)
• M56: 16,936,125 km (0.095 R)
• M57: 17,020,199 km (0.1 R)
• M58: 17,104,422 km (0.062 R)
• M59: 17,485,448 km (0.047 R)
• M60: 18,126,624 km (0.111 R)
• M61: 18,558,364 km (0.089 R)
• M62: 19,037,227 km (0.105 R)
• M63: 20,542,630 km (0.081 R)
• M64: 21,218,962 km (0.052 R)
• M65: 21,309,768 km (0.076 R)
• M66: 21,491,529 km (0.07 R)
• M67: 22,224,110 km (0.075 R)
• M68: 23,478,787 km (0.085 R)
• M69: 24,375,327 km (0.059 R)
• M70: 24,899,518 km (0.098 R)
• M71: 25,379,279 km (0.099 R)
• M72: 25,523,940 km (0.118 R)
• M73: 26,396,843 km (0.117 R)
• M74: 27,427,573 km (0.118 R)
• M75: 27,526,457 km (0.08 R)
• M76: 28,772,009 km (0.094 R)
• M77: 29,578,940 km (0.052 R)
• M78: 30,291,026 km (0.083 R)
• M79: 30,342,039 km (0.094 R)
• M80: 30,854,411 km (0.057 R)
• M81: 32,460,943 km (0.076 R)
• M82: 33,564,526 km (0.077 R)
• M83: 34,680,377 km (0.064 R)
• M84: 35,377,353 km (0.074 R)
• M85: 36,024,663 km (0.079 R)

Kuiper Belt

Range: 30 - 53 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 342 - 15,242 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit