🌌 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: 370.4

Radius: 8.1

Gravity: 5.65 G

Time & Orbit

Eccentricity (e): 0.092

Orbit Range: 0.67 AU - 0.81 AU

Year: 424 Days

Day: 7.1 Hours

Environment

Temp: -157 °C

Axial Tilt: 22.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 37,697,959 km

• M1: 100,829 km (0.044 R)
• M2: 154,235 km (0.115 R)
• M3: 232,625 km (0.083 R)
• M4: 286,929 km (0.09 R)
• M5: 354,846 km (0.112 R)
• M6: 418,126 km (0.068 R)
• M7: 554,709 km (0.105 R)
• M8: 607,068 km (0.052 R)
• M9: 678,726 km (0.112 R)
• M10: 764,146 km (0.107 R)
• M11: 888,013 km (0.108 R)
• M12: 938,727 km (0.069 R)
• M13: 1,035,068 km (0.119 R)
• M14: 1,122,134 km (0.042 R)
• M15: 1,207,554 km (0.106 R)
• M16: 1,273,078 km (0.085 R)
• M17: 1,326,335 km (0.095 R)
• M18: 1,430,604 km (0.053 R)
• M19: 1,504,805 km (0.1 R)
• M20: 1,609,075 km (0.097 R)
• M21: 1,666,969 km (0.116 R)
• M22: 1,735,335 km (0.052 R)
• M23: 1,865,037 km (0.115 R)
• M24: 2,029,146 km (0.115 R)
• M25: 2,086,591 km (0.071 R)
• M26: 2,139,399 km (0.071 R)
• M27: 2,219,434 km (0.065 R)
• M28: 2,316,673 km (0.111 R)
• M29: 2,426,627 km (0.042 R)
• M30: 2,504,568 km (0.118 R)
• M31: 2,628,734 km (0.078 R)
• M32: 2,726,122 km (0.091 R)
• M33: 2,989,863 km (0.046 R)
• M34: 3,103,707 km (0.047 R)
• M35: 3,188,529 km (0.117 R)
• M36: 3,329,600 km (0.037 R)
• M37: 3,385,400 km (0.078 R)
• M38: 3,560,878 km (0.088 R)
• M39: 3,713,618 km (0.113 R)
• M40: 3,829,705 km (0.102 R)
• M41: 3,927,393 km (0.113 R)
• M42: 4,098,533 km (0.044 R)
• M43: 4,171,836 km (0.085 R)
• M44: 4,360,030 km (0.071 R)
• M45: 4,599,387 km (0.114 R)
• M46: 4,675,532 km (0.1 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.06 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 764.4

Radius: 8

Gravity: 11.94 G

Time & Orbit

Eccentricity (e): 0.195

Orbit Range: 0.85 AU - 1.27 AU

Year: 728 Days

Day: 12.1 Hours

Environment

Temp: -176 °C

Axial Tilt: 22.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 37,697,959 km

• M1: 127,457 km (0.092 R)
• M2: 264,938 km (0.118 R)
• M3: 346,319 km (0.088 R)
• M4: 515,065 km (0.068 R)
• M5: 577,448 km (0.096 R)
• M6: 652,845 km (0.093 R)
• M7: 775,665 km (0.056 R)
• M8: 854,204 km (0.1 R)
• M9: 929,751 km (0.11 R)
• M10: 1,026,092 km (0.049 R)
• M11: 1,144,723 km (0.103 R)
• M12: 1,209,200 km (0.078 R)
• M13: 1,261,559 km (0.052 R)
• M14: 1,361,939 km (0.099 R)
• M15: 1,542,504 km (0.118 R)
• M16: 1,650,214 km (0.114 R)
• M17: 1,723,517 km (0.034 R)
• M18: 1,881,044 km (0.074 R)
• M19: 2,050,987 km (0.057 R)
• M20: 2,185,924 km (0.119 R)
• M21: 2,456,397 km (0.077 R)
• M22: 2,540,471 km (0.104 R)
• M23: 2,642,646 km (0.116 R)
• M24: 2,746,168 km (0.089 R)
• M25: 3,019,932 km (0.052 R)
• M26: 3,256,446 km (0.107 R)
• M27: 3,508,369 km (0.029 R)
• M28: 3,593,790 km (0.065 R)
• M29: 3,651,235 km (0.081 R)
• M30: 3,747,427 km (0.052 R)
• M31: 3,952,376 km (0.053 R)
• M32: 4,011,467 km (0.099 R)
• M33: 4,221,203 km (0.103 R)
• M34: 4,281,790 km (0.095 R)
• M35: 4,413,885 km (0.083 R)
• M36: 4,568,270 km (0.105 R)
• M37: 4,640,825 km (0.118 R)
• M38: 4,861,033 km (0.091 R)
• M39: 5,084,532 km (0.09 R)
• M40: 5,344,234 km (0.105 R)
• M41: 5,442,670 km (0.106 R)
• M42: 5,563,994 km (0.095 R)
• M43: 5,674,995 km (0.107 R)
• M44: 5,876,653 km (0.079 R)
• M45: 5,978,380 km (0.103 R)
• M46: 6,080,555 km (0.042 R)
• M47: 6,137,701 km (0.04 R)
• M48: 6,379,452 km (0.07 R)
• M49: 6,495,689 km (0.118 R)
• M50: 6,612,675 km (0.109 R)
• M51: 6,718,440 km (0.114 R)
• M52: 6,872,377 km (0.042 R)
• M53: 7,075,381 km (0.094 R)
• M54: 7,159,455 km (0.084 R)
• M55: 7,365,302 km (0.052 R)
• M56: 7,438,455 km (0.069 R)
• M57: 7,499,491 km (0.095 R)
• M58: 7,770,413 km (0.096 R)
• M59: 7,832,346 km (0.116 R)
• M60: 8,044,476 km (0.057 R)
• M61: 8,119,724 km (0.099 R)
• M62: 8,233,119 km (0.066 R)
• M63: 8,347,112 km (0.059 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.12 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 194.9

Radius: 8.9

Gravity: 2.46 G

Time & Orbit

Eccentricity (e): 0.055

Orbit Range: 1.06 AU - 1.18 AU

Year: 790 Days

Day: 6.7 Hours

Environment

Temp: -184 °C

Axial Tilt: 22.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (49)

Outer Limit: 37,697,959 km

• M1: 111,600 km (0.055 R)
• M2: 174,431 km (0.115 R)
• M3: 232,325 km (0.096 R)
• M4: 293,511 km (0.087 R)
• M5: 396,285 km (0.067 R)
• M6: 513,420 km (0.115 R)
• M7: 578,645 km (0.118 R)
• M8: 686,505 km (0.108 R)
• M9: 759,508 km (0.086 R)
• M10: 839,842 km (0.117 R)
• M11: 918,681 km (0.093 R)
• M12: 1,051,224 km (0.065 R)
• M13: 1,269,936 km (0.095 R)
• M14: 1,371,812 km (0.068 R)
• M15: 1,466,059 km (0.075 R)
• M16: 1,557,015 km (0.078 R)
• M17: 1,649,915 km (0.09 R)
• M18: 1,722,320 km (0.075 R)
• M19: 1,790,088 km (0.096 R)
• M20: 1,858,754 km (0.056 R)
• M21: 1,992,943 km (0.097 R)
• M22: 2,076,269 km (0.113 R)
• M23: 2,172,909 km (0.067 R)
• M24: 2,258,778 km (0.095 R)
• M25: 2,333,278 km (0.083 R)
• M26: 2,698,446 km (0.118 R)
• M27: 3,074,835 km (0.051 R)
• M28: 3,157,712 km (0.099 R)
• M29: 3,255,399 km (0.111 R)
• M30: 3,590,498 km (0.049 R)
• M31: 3,751,167 km (0.119 R)
• M32: 3,839,878 km (0.103 R)
• M33: 3,944,148 km (0.11 R)
• M34: 4,011,766 km (0.064 R)
• M35: 4,216,865 km (0.119 R)
• M36: 4,332,354 km (0.095 R)
• M37: 4,464,449 km (0.114 R)
• M38: 4,542,839 km (0.046 R)
• M39: 4,661,170 km (0.073 R)
• M40: 4,732,678 km (0.059 R)
• M41: 4,796,557 km (0.081 R)
• M42: 5,144,970 km (0.083 R)
• M43: 5,243,705 km (0.084 R)
• M44: 5,301,599 km (0.071 R)
• M45: 5,368,020 km (0.089 R)
• M46: 5,451,496 km (0.113 R)
• M47: 5,526,893 km (0.115 R)
• M48: 5,687,262 km (0.104 R)
• M49: 5,806,492 km (0.103 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.16 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 203.4

Radius: 8.8

Gravity: 2.63 G

Time & Orbit

Eccentricity (e): 0.002

Orbit Range: 1.16 AU - 1.16 AU

Year: 833 Days

Day: 11.2 Hours

Environment

Temp: -183 °C

Axial Tilt: 24.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (48)

Outer Limit: 37,697,959 km

• M1: 111,002 km (0.083 R)
• M2: 191,036 km (0.078 R)
• M3: 255,214 km (0.118 R)
• M4: 322,084 km (0.078 R)
• M5: 390,301 km (0.106 R)
• M6: 702,512 km (0.078 R)
• M7: 791,822 km (0.11 R)
• M8: 867,219 km (0.049 R)
• M9: 926,609 km (0.103 R)
• M10: 1,011,282 km (0.063 R)
• M11: 1,088,923 km (0.117 R)
• M12: 1,219,372 km (0.105 R)
• M13: 1,312,871 km (0.079 R)
• M14: 1,507,199 km (0.097 R)
• M15: 1,574,069 km (0.066 R)
• M16: 1,641,986 km (0.112 R)
• M17: 1,722,619 km (0.067 R)
• M18: 1,786,797 km (0.072 R)
• M19: 1,857,856 km (0.058 R)
• M20: 1,941,930 km (0.072 R)
• M21: 2,278,525 km (0.085 R)
• M22: 2,394,763 km (0.103 R)
• M23: 2,506,512 km (0.09 R)
• M24: 2,653,567 km (0.107 R)
• M25: 2,735,098 km (0.105 R)
• M26: 2,831,140 km (0.073 R)
• M27: 3,012,752 km (0.119 R)
• M28: 3,076,480 km (0.026 R)
• M29: 3,277,839 km (0.116 R)
• M30: 3,372,684 km (0.096 R)
• M31: 3,625,355 km (0.103 R)
• M32: 3,799,936 km (0.101 R)
• M33: 3,891,938 km (0.105 R)
• M34: 4,000,397 km (0.101 R)
• M35: 4,086,415 km (0.063 R)
• M36: 4,188,740 km (0.105 R)
• M37: 4,323,827 km (0.04 R)
• M38: 4,379,926 km (0.118 R)
• M39: 4,444,254 km (0.078 R)
• M40: 4,606,567 km (0.097 R)
• M41: 4,696,775 km (0.074 R)
• M42: 4,828,870 km (0.072 R)
• M43: 5,275,569 km (0.076 R)
• M44: 5,344,085 km (0.075 R)
• M45: 5,412,900 km (0.107 R)
• M46: 5,482,164 km (0.107 R)
• M47: 5,551,577 km (0.107 R)
• M48: 5,612,613 km (0.093 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 583

Radius: 14

Gravity: 2.97 G

Time & Orbit

Eccentricity (e): 0.236

Orbit Range: 1.34 AU - 2.16 AU

Year: 1544 Days

Day: 7.5 Hours

Environment

Temp: -187 °C

Axial Tilt: 114.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 37,697,959 km

• M1: 178,620 km (0.058 R)
• M2: 269,725 km (0.102 R)
• M3: 378,034 km (0.109 R)
• M4: 482,603 km (0.086 R)
• M5: 664,065 km (0.111 R)
• M6: 799,750 km (0.119 R)
• M7: 953,537 km (0.078 R)
• M8: 1,054,366 km (0.12 R)
• M9: 1,327,681 km (0.114 R)
• M10: 1,459,926 km (0.102 R)
• M11: 1,569,132 km (0.099 R)
• M12: 1,796,072 km (0.044 R)
• M13: 1,933,702 km (0.108 R)
• M14: 2,209,261 km (0.03 R)
• M15: 2,325,349 km (0.099 R)
• M16: 2,530,897 km (0.1 R)
• M17: 2,936,905 km (0.112 R)
• M18: 3,159,806 km (0.058 R)
• M19: 3,315,538 km (0.051 R)
• M20: 3,461,545 km (0.113 R)
• M21: 3,672,329 km (0.114 R)
• M22: 3,990,074 km (0.104 R)
• M23: 4,158,821 km (0.078 R)
• M24: 4,290,317 km (0.091 R)
• M25: 4,530,572 km (0.103 R)
• M26: 4,734,324 km (0.088 R)
• M27: 4,982,806 km (0.118 R)
• M28: 5,263,900 km (0.049 R)
• M29: 5,478,274 km (0.047 R)
• M30: 6,108,829 km (0.058 R)
• M31: 6,288,945 km (0.084 R)
• M32: 6,470,856 km (0.068 R)
• M33: 6,562,410 km (0.094 R)
• M34: 7,058,476 km (0.117 R)
• M35: 7,184,438 km (0.068 R)
• M36: 7,390,733 km (0.07 R)
• M37: 8,103,417 km (0.05 R)
• M38: 8,235,363 km (0.114 R)
• M39: 8,434,627 km (0.1 R)
• M40: 8,618,782 km (0.103 R)
• M41: 8,719,761 km (0.073 R)
• M42: 8,855,147 km (0.1 R)
• M43: 8,957,023 km (0.1 R)
• M44: 9,059,348 km (0.106 R)
• M45: 9,213,583 km (0.085 R)
• M46: 9,699,028 km (0.101 R)
• M47: 10,210,653 km (0.072 R)
• M48: 10,299,664 km (0.057 R)
• M49: 10,407,075 km (0.064 R)
• M50: 10,622,646 km (0.107 R)
• M51: 11,186,779 km (0.065 R)
• M52: 11,704,687 km (0.066 R)
• M53: 12,192,526 km (0.097 R)
• M54: 12,325,069 km (0.108 R)
• M55: 12,610,652 km (0.089 R)
• M56: 12,725,543 km (0.032 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.85 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 896

Radius: 10.5

Gravity: 8.13 G

Time & Orbit

Eccentricity (e): 0.248

Orbit Range: 2.14 AU - 3.56 AU

Year: 3208 Days

Day: 13.6 Hours

Environment

Temp: -213 °C

Axial Tilt: 33.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 37,697,959 km

• M1: 131,347 km (0.103 R)
• M2: 233,073 km (0.083 R)
• M3: 471,981 km (0.091 R)
• M4: 573,558 km (0.067 R)
• M5: 693,985 km (0.04 R)
• M6: 1,058,854 km (0.077 R)
• M7: 1,493,884 km (0.12 R)
• M8: 1,650,813 km (0.083 R)
• M9: 2,059,364 km (0.073 R)
• M10: 2,415,407 km (0.109 R)
• M11: 2,499,182 km (0.111 R)
• M12: 2,703,982 km (0.078 R)
• M13: 2,985,824 km (0.1 R)
• M14: 3,076,031 km (0.051 R)
• M15: 3,731,868 km (0.071 R)
• M16: 4,146,105 km (0.058 R)
• M17: 4,512,769 km (0.115 R)
• M18: 5,082,588 km (0.092 R)
• M19: 5,169,055 km (0.048 R)
• M20: 5,630,565 km (0.088 R)
• M21: 5,945,618 km (0.079 R)
• M22: 6,336,068 km (0.102 R)
• M23: 6,452,455 km (0.075 R)
• M24: 7,556,787 km (0.11 R)
• M25: 7,754,705 km (0.094 R)
• M26: 8,231,922 km (0.109 R)
• M27: 8,615,491 km (0.034 R)
• M28: 8,770,474 km (0.096 R)
• M29: 8,952,535 km (0.113 R)
• M30: 9,347,025 km (0.099 R)
• M31: 9,720,271 km (0.055 R)
• M32: 9,800,904 km (0.076 R)
• M33: 10,071,228 km (0.079 R)
• M34: 10,234,589 km (0.06 R)
• M35: 11,120,956 km (0.117 R)
• M36: 11,716,056 km (0.098 R)
• M37: 12,089,602 km (0.092 R)
• M38: 12,234,263 km (0.102 R)
• M39: 12,496,209 km (0.117 R)
• M40: 12,877,834 km (0.057 R)
• M41: 12,996,165 km (0.093 R)
• M42: 13,412,646 km (0.094 R)
• M43: 13,743,108 km (0.112 R)
• M44: 14,015,525 km (0.103 R)
• M45: 14,411,960 km (0.117 R)
• M46: 14,843,250 km (0.099 R)
• M47: 14,967,267 km (0.068 R)
• M48: 15,060,466 km (0.071 R)
• M49: 15,216,198 km (0.099 R)
• M50: 15,372,528 km (0.096 R)
• M51: 15,466,625 km (0.091 R)
• M52: 15,623,702 km (0.117 R)
• M53: 15,749,963 km (0.056 R)
• M54: 16,385,604 km (0.074 R)
• M55: 16,674,478 km (0.087 R)
• M56: 16,835,595 km (0.034 R)
• M57: 16,932,684 km (0.038 R)
• M58: 17,094,698 km (0.069 R)
• M59: 18,143,828 km (0.088 R)
• M60: 18,210,100 km (0.093 R)
• M61: 18,409,364 km (0.062 R)
• M62: 19,045,155 km (0.114 R)
• M63: 19,586,251 km (0.092 R)
• M64: 19,722,235 km (0.047 R)
• M65: 20,441,801 km (0.102 R)
• M66: 20,579,730 km (0.105 R)
• M67: 21,765,293 km (0.089 R)
• M68: 21,871,059 km (0.037 R)
• M69: 22,295,468 km (0.096 R)
• M70: 22,508,645 km (0.067 R)
• M71: 23,116,611 km (0.084 R)
• M72: 23,476,693 km (0.097 R)
• M73: 23,585,002 km (0.068 R)
• M74: 23,657,407 km (0.11 R)
• M75: 24,093,036 km (0.078 R)
• M76: 24,275,396 km (0.082 R)
• M77: 24,494,707 km (0.115 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 644.8

Radius: 9.3

Gravity: 7.46 G

Time & Orbit

Eccentricity (e): 0.124

Orbit Range: 4.27 AU - 5.49 AU

Year: 7189 Days

Day: 8.9 Hours

Environment

Temp: -230 °C

Axial Tilt: 10.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 37,697,959 km

• M1: 177,872 km (0.077 R)
• M2: 255,364 km (0.09 R)
• M3: 462,557 km (0.093 R)
• M4: 667,954 km (0.063 R)
• M5: 796,758 km (0.069 R)
• M6: 950,096 km (0.1 R)
• M7: 1,816,567 km (0.112 R)
• M8: 2,126,683 km (0.113 R)
• M9: 2,520,874 km (0.087 R)
• M10: 2,634,568 km (0.055 R)
• M11: 3,081,866 km (0.111 R)
• M12: 3,351,890 km (0.09 R)
• M13: 3,426,838 km (0.12 R)
• M14: 3,527,667 km (0.045 R)
• M15: 3,967,336 km (0.073 R)
• M16: 4,073,400 km (0.086 R)
• M17: 4,261,146 km (0.111 R)
• M18: 4,396,981 km (0.099 R)
• M19: 4,534,461 km (0.069 R)
• M20: 4,617,488 km (0.083 R)
• M21: 4,701,113 km (0.073 R)
• M22: 5,300,701 km (0.055 R)
• M23: 5,417,687 km (0.094 R)
• M24: 6,106,735 km (0.117 R)
• M25: 7,207,775 km (0.116 R)
• M26: 7,305,014 km (0.102 R)
• M27: 7,468,075 km (0.092 R)
• M28: 7,566,511 km (0.115 R)
• M29: 7,632,334 km (0.035 R)
• M30: 7,731,368 km (0.079 R)
• M31: 8,437,170 km (0.112 R)
• M32: 8,505,537 km (0.104 R)
• M33: 9,587,728 km (0.065 R)
• M34: 9,694,690 km (0.084 R)
• M35: 10,018,121 km (0.104 R)
• M36: 10,163,081 km (0.116 R)
• M37: 10,823,855 km (0.069 R)
• M38: 10,935,305 km (0.042 R)
• M39: 11,384,996 km (0.116 R)
• M40: 11,688,231 km (0.043 R)
• M41: 12,071,052 km (0.101 R)
• M42: 12,186,691 km (0.088 R)
• M43: 12,341,376 km (0.062 R)
• M44: 12,419,017 km (0.108 R)
• M45: 12,613,793 km (0.106 R)
• M46: 12,809,617 km (0.026 R)
• M47: 13,602,785 km (0.116 R)
• M48: 13,884,178 km (0.08 R)
• M49: 14,167,517 km (0.084 R)
• M50: 14,248,898 km (0.098 R)
• M51: 15,696,706 km (0.111 R)
• M52: 15,949,527 km (0.114 R)
• M53: 16,246,329 km (0.051 R)
• M54: 16,630,496 km (0.032 R)
• M55: 17,844,932 km (0.065 R)
• M56: 17,976,877 km (0.112 R)
• M57: 18,285,647 km (0.12 R)
• M58: 19,719,692 km (0.05 R)
• M59: 19,855,976 km (0.08 R)
• M60: 20,083,813 km (0.108 R)
• M61: 20,634,334 km (0.057 R)
• M62: 20,772,712 km (0.058 R)
• M63: 20,957,614 km (0.074 R)
• M64: 21,143,116 km (0.114 R)
• M65: 22,694,595 km (0.116 R)
• M66: 22,837,461 km (0.059 R)
• M67: 23,076,220 km (0.117 R)
• M68: 23,363,747 km (0.057 R)
• M69: 23,508,109 km (0.053 R)
• M70: 24,819,633 km (0.112 R)
• M71: 25,806,381 km (0.108 R)
• M72: 26,906,523 km (0.074 R)
• M73: 27,007,352 km (0.103 R)
• M74: 27,108,331 km (0.071 R)
• M75: 27,920,049 km (0.118 R)
• M76: 30,612,960 km (0.025 R)
• M77: 31,830,388 km (0.113 R)
• M78: 31,936,901 km (0.09 R)
• M79: 32,901,808 km (0.099 R)
• M80: 33,767,381 km (0.09 R)
• M81: 34,093,953 km (0.115 R)
• M82: 34,421,423 km (0.095 R)
• M83: 35,576,318 km (0.111 R)
• M84: 36,855,530 km (0.098 R)
• M85: 37,472,621 km (0.087 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 184 - 10,359 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit