🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.44 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.87 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 302.6

Radius: 8.3

Gravity: 4.39 G

Time & Orbit

Eccentricity (e): 0.224

Orbit Range: 0.68 AU - 1.06 AU

Year: 570 Days

Day: 10.3 Hours

Environment

Temp: -168 °C

Axial Tilt: 13.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (45)

Outer Limit: 65,032,350 km

• M1: 117,135 km (0.038 R)
• M2: 187,147 km (0.068 R)
• M3: 248,931 km (0.118 R)
• M4: 307,424 km (0.08 R)
• M5: 393,143 km (0.082 R)
• M6: 495,019 km (0.09 R)
• M7: 632,201 km (0.059 R)
• M8: 699,968 km (0.085 R)
• M9: 782,546 km (0.026 R)
• M10: 885,171 km (0.109 R)
• M11: 949,049 km (0.098 R)
• M12: 1,014,573 km (0.061 R)
• M13: 1,086,380 km (0.069 R)
• M14: 1,178,532 km (0.102 R)
• M15: 1,239,867 km (0.061 R)
• M16: 1,375,702 km (0.111 R)
• M17: 1,526,945 km (0.102 R)
• M18: 1,840,353 km (0.038 R)
• M19: 1,956,740 km (0.085 R)
• M20: 2,115,912 km (0.084 R)
• M21: 2,214,647 km (0.08 R)
• M22: 2,273,439 km (0.054 R)
• M23: 2,404,786 km (0.091 R)
• M24: 2,459,239 km (0.113 R)
• M25: 2,618,860 km (0.088 R)
• M26: 2,762,923 km (0.088 R)
• M27: 2,858,217 km (0.118 R)
• M28: 2,928,977 km (0.029 R)
• M29: 3,085,157 km (0.077 R)
• M30: 3,164,294 km (0.07 R)
• M31: 3,311,349 km (0.094 R)
• M32: 3,667,541 km (0.098 R)
• M33: 3,892,985 km (0.052 R)
• M34: 4,036,151 km (0.115 R)
• M35: 4,108,406 km (0.085 R)
• M36: 4,312,907 km (0.111 R)
• M37: 4,468,638 km (0.1 R)
• M38: 4,596,095 km (0.07 R)
• M39: 4,648,903 km (0.063 R)
• M40: 4,877,489 km (0.1 R)
• M41: 4,939,123 km (0.025 R)
• M42: 5,055,361 km (0.119 R)
• M43: 5,172,496 km (0.057 R)
• M44: 5,306,236 km (0.039 R)
• M45: 5,393,452 km (0.119 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.07 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 981.7

Radius: 12.8

Gravity: 5.99 G

Time & Orbit

Eccentricity (e): 0.042

Orbit Range: 1.03 AU - 1.11 AU

Year: 778 Days

Day: 12.8 Hours

Environment

Temp: -178 °C

Axial Tilt: 38.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (59)

Outer Limit: 65,032,350 km

• M1: 160,070 km (0.097 R)
• M2: 350,358 km (0.116 R)
• M3: 447,447 km (0.079 R)
• M4: 587,471 km (0.057 R)
• M5: 785,090 km (0.108 R)
• M6: 892,950 km (0.12 R)
• M7: 1,019,360 km (0.08 R)
• M8: 1,193,342 km (0.1 R)
• M9: 1,363,136 km (0.104 R)
• M10: 1,481,019 km (0.105 R)
• M11: 1,610,271 km (0.107 R)
• M12: 1,735,485 km (0.069 R)
• M13: 1,896,751 km (0.107 R)
• M14: 1,996,084 km (0.077 R)
• M15: 2,131,321 km (0.111 R)
• M16: 2,260,873 km (0.116 R)
• M17: 2,384,291 km (0.111 R)
• M18: 2,564,706 km (0.079 R)
• M19: 2,768,458 km (0.03 R)
• M20: 2,958,298 km (0.096 R)
• M21: 3,211,866 km (0.084 R)
• M22: 3,341,268 km (0.069 R)
• M23: 3,492,961 km (0.099 R)
• M24: 3,595,286 km (0.106 R)
• M25: 3,740,246 km (0.097 R)
• M26: 3,834,642 km (0.12 R)
• M27: 3,972,272 km (0.095 R)
• M28: 4,079,235 km (0.04 R)
• M29: 4,395,036 km (0.103 R)
• M30: 4,516,958 km (0.074 R)
• M31: 4,640,077 km (0.114 R)
• M32: 4,889,606 km (0.055 R)
• M33: 5,050,723 km (0.113 R)
• M34: 5,131,955 km (0.064 R)
• M35: 5,260,460 km (0.047 R)
• M36: 5,390,161 km (0.117 R)
• M37: 5,664,673 km (0.098 R)
• M38: 5,870,520 km (0.052 R)
• M39: 6,302,409 km (0.102 R)
• M40: 6,440,188 km (0.09 R)
• M41: 6,566,449 km (0.117 R)
• M42: 6,885,541 km (0.064 R)
• M43: 7,053,540 km (0.073 R)
• M44: 7,170,675 km (0.048 R)
• M45: 7,393,725 km (0.102 R)
• M46: 7,486,177 km (0.112 R)
• M47: 7,672,276 km (0.087 R)
• M48: 7,752,610 km (0.115 R)
• M49: 7,995,109 km (0.097 R)
• M50: 8,294,903 km (0.115 R)
• M51: 8,446,146 km (0.117 R)
• M52: 8,653,938 km (0.08 R)
• M53: 8,779,450 km (0.093 R)
• M54: 8,891,499 km (0.096 R)
• M55: 9,018,208 km (0.117 R)
• M56: 9,117,093 km (0.077 R)
• M57: 9,273,273 km (0.111 R)
• M58: 9,588,476 km (0.097 R)
• M59: 9,689,454 km (0.104 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.66 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 387.2

Radius: 9.8

Gravity: 4.03 G

Time & Orbit

Eccentricity (e): 0.052

Orbit Range: 1.57 AU - 1.75 AU

Year: 1503 Days

Day: 11.7 Hours

Environment

Temp: -187 °C

Axial Tilt: 47.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 65,032,350 km

• M1: 127,009 km (0.082 R)
• M2: 227,688 km (0.045 R)
• M3: 292,913 km (0.112 R)
• M4: 354,098 km (0.051 R)
• M5: 467,194 km (0.1 R)
• M6: 696,228 km (0.115 R)
• M7: 933,341 km (0.11 R)
• M8: 1,025,344 km (0.069 R)
• M9: 1,091,017 km (0.094 R)
• M10: 1,242,261 km (0.03 R)
• M11: 1,328,579 km (0.099 R)
• M12: 1,425,069 km (0.094 R)
• M13: 1,685,519 km (0.104 R)
• M14: 1,870,721 km (0.056 R)
• M15: 2,109,480 km (0.108 R)
• M16: 2,213,450 km (0.092 R)
• M17: 2,358,111 km (0.085 R)
• M18: 2,505,914 km (0.091 R)
• M19: 2,576,075 km (0.111 R)
• M20: 2,821,266 km (0.086 R)
• M21: 2,978,494 km (0.117 R)
• M22: 3,138,713 km (0.117 R)
• M23: 3,290,854 km (0.066 R)
• M24: 3,478,749 km (0.101 R)
• M25: 3,681,753 km (0.091 R)
• M26: 3,819,234 km (0.09 R)
• M27: 3,900,316 km (0.083 R)
• M28: 4,182,457 km (0.059 R)
• M29: 4,569,018 km (0.045 R)
• M30: 4,655,037 km (0.091 R)
• M31: 4,766,637 km (0.085 R)
• M32: 4,866,568 km (0.057 R)
• M33: 4,979,664 km (0.116 R)
• M34: 5,081,092 km (0.112 R)
• M35: 5,170,402 km (0.045 R)
• M36: 5,389,413 km (0.104 R)
• M37: 5,493,533 km (0.07 R)
• M38: 5,664,224 km (0.052 R)
• M39: 5,836,561 km (0.045 R)
• M40: 6,037,770 km (0.082 R)
• M41: 6,282,213 km (0.113 R)
• M42: 6,668,774 km (0.092 R)
• M43: 6,850,984 km (0.074 R)
• M44: 6,949,719 km (0.085 R)
• M45: 7,220,341 km (0.114 R)
• M46: 7,349,743 km (0.112 R)
• M47: 7,465,383 km (0.091 R)
• M48: 7,566,959 km (0.037 R)
• M49: 7,757,098 km (0.073 R)
• M50: 7,948,733 km (0.091 R)
• M51: 8,097,284 km (0.086 R)
• M52: 8,291,761 km (0.075 R)
• M53: 8,381,969 km (0.114 R)
• M54: 8,685,353 km (0.076 R)
• M55: 8,869,059 km (0.1 R)
• M56: 9,084,929 km (0.046 R)
• M57: 9,224,803 km (0.101 R)
• M58: 9,318,302 km (0.066 R)
• M59: 9,775,024 km (0.077 R)
• M60: 9,854,610 km (0.095 R)
• M61: 10,014,231 km (0.101 R)
• M62: 10,078,259 km (0.074 R)
• M63: 10,206,913 km (0.11 R)
• M64: 10,612,323 km (0.1 R)
• M65: 10,891,024 km (0.054 R)
• M66: 11,023,119 km (0.069 R)
• M67: 11,105,847 km (0.047 R)
• M68: 11,188,874 km (0.108 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.5 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 699.5

Radius: 14

Gravity: 3.57 G

Time & Orbit

Eccentricity (e): 0.109

Orbit Range: 2.23 AU - 2.77 AU

Year: 2779 Days

Day: 9.7 Hours

Environment

Temp: -202 °C

Axial Tilt: 16.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 65,032,350 km

• M1: 264,489 km (0.085 R)
• M2: 362,176 km (0.103 R)
• M3: 451,486 km (0.112 R)
• M4: 559,646 km (0.116 R)
• M5: 652,696 km (0.095 R)
• M6: 752,028 km (0.105 R)
• M7: 1,063,940 km (0.043 R)
• M8: 1,218,774 km (0.085 R)
• M9: 1,888,524 km (0.059 R)
• M10: 1,996,832 km (0.032 R)
• M11: 2,177,397 km (0.09 R)
• M12: 2,363,646 km (0.068 R)
• M13: 2,451,311 km (0.032 R)
• M14: 2,615,270 km (0.068 R)
• M15: 2,736,743 km (0.096 R)
• M16: 2,829,195 km (0.098 R)
• M17: 3,225,928 km (0.077 R)
• M18: 3,323,765 km (0.064 R)
• M19: 3,640,614 km (0.059 R)
• M20: 3,932,479 km (0.055 R)
• M21: 4,267,878 km (0.113 R)
• M22: 4,393,839 km (0.118 R)
• M23: 4,686,452 km (0.044 R)
• M24: 5,175,787 km (0.1 R)
• M25: 5,582,993 km (0.088 R)
• M26: 5,960,578 km (0.06 R)
• M27: 6,367,035 km (0.078 R)
• M28: 6,552,836 km (0.046 R)
• M29: 6,740,581 km (0.1 R)
• M30: 7,036,186 km (0.097 R)
• M31: 7,271,354 km (0.052 R)
• M32: 7,705,786 km (0.1 R)
• M33: 7,904,153 km (0.107 R)
• M34: 8,126,456 km (0.106 R)
• M35: 8,441,209 km (0.11 R)
• M36: 8,577,344 km (0.028 R)
• M37: 8,668,598 km (0.035 R)
• M38: 8,874,894 km (0.102 R)
• M39: 9,175,885 km (0.047 R)
• M40: 9,692,745 km (0.08 R)
• M41: 9,859,397 km (0.085 R)
• M42: 10,340,354 km (0.112 R)
• M43: 10,559,366 km (0.114 R)
• M44: 10,730,655 km (0.092 R)
• M45: 11,200,542 km (0.11 R)
• M46: 12,058,187 km (0.098 R)
• M47: 12,186,093 km (0.064 R)
• M48: 12,443,401 km (0.083 R)
• M49: 12,624,415 km (0.036 R)
• M50: 12,937,074 km (0.065 R)
• M51: 13,304,935 km (0.083 R)
• M52: 13,809,679 km (0.057 R)
• M53: 13,970,496 km (0.089 R)
• M54: 15,002,871 km (0.071 R)
• M55: 15,472,758 km (0.087 R)
• M56: 15,891,333 km (0.03 R)
• M57: 16,059,930 km (0.108 R)
• M58: 16,739,852 km (0.052 R)
• M59: 16,854,145 km (0.078 R)
• M60: 16,968,587 km (0.115 R)
• M61: 17,140,774 km (0.055 R)
• M62: 17,400,327 km (0.115 R)
• M63: 17,748,291 km (0.096 R)
• M64: 17,981,664 km (0.067 R)
• M65: 18,215,934 km (0.111 R)
• M66: 18,657,996 km (0.051 R)
• M67: 18,776,478 km (0.037 R)
• M68: 19,014,189 km (0.032 R)
• M69: 19,133,418 km (0.027 R)
• M70: 19,522,672 km (0.074 R)
• M71: 20,126,748 km (0.059 R)
• M72: 20,248,221 km (0.104 R)
• M73: 20,339,476 km (0.051 R)

Planet 5 - Ice Giant

Semi-Major Axis: 5.58 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 705.9

Radius: 3.8

Gravity: 48.89 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 5.28 AU - 5.88 AU

Year: 9265 Days

Day: 22 Hours

Environment

Temp: -216 °C

Axial Tilt: 6.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 65,032,350 km

• M1: 63,579 km (0.067 R)
• M2: 93,199 km (0.067 R)
• M3: 530,624 km (0.086 R)
• M4: 1,029,383 km (0.062 R)
• M5: 1,329,925 km (0.052 R)
• M6: 1,393,205 km (0.102 R)
• M7: 1,588,879 km (0.071 R)
• M8: 1,701,377 km (0.116 R)
• M9: 1,886,878 km (0.092 R)
• M10: 1,958,087 km (0.085 R)
• M11: 1,982,022 km (0.08 R)
• M12: 2,054,428 km (0.049 R)
• M13: 2,152,265 km (0.088 R)
• M14: 2,176,948 km (0.091 R)
• M15: 3,184,340 km (0.103 R)
• M16: 3,212,465 km (0.105 R)
• M17: 3,269,162 km (0.081 R)
• M18: 3,528,415 km (0.118 R)
• M19: 3,944,746 km (0.112 R)
• M20: 4,313,804 km (0.103 R)
• M21: 4,534,162 km (0.108 R)
• M22: 4,855,348 km (0.107 R)
• M23: 4,920,424 km (0.099 R)
• M24: 5,451,795 km (0.097 R)
• M25: 5,966,412 km (0.103 R)
• M26: 6,930,869 km (0.117 R)
• M27: 7,151,825 km (0.111 R)
• M28: 7,449,824 km (0.089 R)
• M29: 8,407,251 km (0.049 R)
• M30: 8,446,296 km (0.071 R)
• M31: 8,485,490 km (0.038 R)
• M32: 8,840,486 km (0.095 R)
• M33: 9,039,900 km (0.081 R)
• M34: 9,646,968 km (0.09 R)
• M35: 9,976,084 km (0.08 R)
• M36: 10,518,675 km (0.1 R)
• M37: 10,730,057 km (0.092 R)
• M38: 11,328,897 km (0.064 R)
• M39: 11,501,982 km (0.12 R)
• M40: 11,763,329 km (0.081 R)
• M41: 12,425,150 km (0.103 R)
• M42: 12,559,040 km (0.111 R)
• M43: 13,508,987 km (0.04 R)
• M44: 14,201,625 km (0.113 R)
• M45: 15,190,617 km (0.095 R)
• M46: 16,641,417 km (0.115 R)
• M47: 17,283,790 km (0.105 R)
• M48: 18,847,836 km (0.117 R)
• M49: 19,362,004 km (0.102 R)
• M50: 19,880,659 km (0.1 R)
• M51: 19,932,869 km (0.109 R)
• M52: 19,985,079 km (0.073 R)
• M53: 20,984,841 km (0.074 R)
• M54: 21,785,639 km (0.051 R)
• M55: 22,325,089 km (0.112 R)
• M56: 22,814,274 km (0.099 R)
• M57: 22,923,480 km (0.052 R)
• M58: 23,307,049 km (0.057 R)
• M59: 23,969,468 km (0.079 R)
• M60: 25,087,264 km (0.104 R)
• M61: 25,652,444 km (0.083 R)
• M62: 27,083,797 km (0.089 R)
• M63: 27,489,207 km (0.102 R)
• M64: 28,130,234 km (0.079 R)
• M65: 28,776,198 km (0.06 R)
• M66: 29,367,857 km (0.11 R)
• M67: 29,486,638 km (0.079 R)
• M68: 29,605,568 km (0.11 R)
• M69: 30,082,935 km (0.03 R)
• M70: 30,382,580 km (0.07 R)
• M71: 30,683,271 km (0.071 R)
• M72: 31,045,298 km (0.096 R)
• M73: 32,815,191 km (0.088 R)
• M74: 33,867,761 km (0.082 R)
• M75: 34,117,141 km (0.085 R)
• M76: 34,554,864 km (0.075 R)
• M77: 35,499,126 km (0.042 R)
• M78: 36,196,850 km (0.101 R)
• M79: 36,771,157 km (0.096 R)
• M80: 37,670,539 km (0.088 R)
• M81: 37,735,016 km (0.117 R)
• M82: 39,033,076 km (0.117 R)
• M83: 40,941,048 km (0.102 R)
• M84: 41,339,576 km (0.118 R)
• M85: 41,406,147 km (0.114 R)
• M86: 41,739,302 km (0.106 R)
• M87: 43,148,813 km (0.09 R)
• M88: 43,216,282 km (0.104 R)
• M89: 43,689,759 km (0.097 R)
• M90: 44,778,532 km (0.085 R)
• M91: 44,846,898 km (0.089 R)
• M92: 44,915,265 km (0.082 R)
• M93: 45,120,663 km (0.055 R)
• M94: 45,326,360 km (0.105 R)
• M95: 45,394,875 km (0.109 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.33 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 599

Radius: 3.6

Gravity: 46.22 G

Time & Orbit

Eccentricity (e): 0.188

Orbit Range: 6.76 AU - 9.9 AU

Year: 16900 Days

Day: 23.7 Hours

Environment

Temp: -242 °C

Axial Tilt: 19.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 65,032,350 km

• M1: 55,501 km (0.105 R)
• M2: 271,520 km (0.1 R)
• M3: 665,112 km (0.051 R)
• M4: 1,171,800 km (0.09 R)
• M5: 1,352,963 km (0.095 R)
• M6: 1,460,524 km (0.083 R)
• M7: 1,570,778 km (0.066 R)
• M8: 1,828,834 km (0.073 R)
• M9: 2,038,570 km (0.074 R)
• M10: 2,099,905 km (0.081 R)
• M11: 2,255,936 km (0.1 R)
• M12: 2,383,393 km (0.084 R)
• M13: 3,340,221 km (0.091 R)
• M14: 3,485,630 km (0.093 R)
• M15: 3,522,282 km (0.073 R)
• M16: 4,049,016 km (0.067 R)
• M17: 4,440,065 km (0.078 R)
• M18: 5,049,078 km (0.072 R)
• M19: 5,132,254 km (0.112 R)
• M20: 5,173,992 km (0.091 R)
• M21: 5,640,887 km (0.12 R)
• M22: 5,770,439 km (0.11 R)
• M23: 5,813,822 km (0.109 R)
• M24: 7,119,811 km (0.069 R)
• M25: 7,542,874 km (0.097 R)
• M26: 7,781,483 km (0.113 R)
• M27: 8,760,003 km (0.097 R)
• M28: 8,809,968 km (0.032 R)
• M29: 11,207,424 km (0.111 R)
• M30: 11,316,032 km (0.078 R)
• M31: 11,588,898 km (0.088 R)
• M32: 11,643,801 km (0.107 R)
• M33: 12,085,563 km (0.101 R)
• M34: 12,308,614 km (0.073 R)
• M35: 12,589,110 km (0.097 R)
• M36: 12,928,697 km (0.077 R)
• M37: 12,985,544 km (0.101 R)
• M38: 13,616,847 km (0.094 R)
• M39: 17,168,300 km (0.092 R)
• M40: 17,860,340 km (0.049 R)
• M41: 19,076,870 km (0.094 R)
• M42: 19,271,497 km (0.093 R)
• M43: 19,597,171 km (0.091 R)
• M44: 20,851,250 km (0.086 R)
• M45: 24,907,297 km (0.108 R)
• M46: 25,120,026 km (0.113 R)
• M47: 25,761,352 km (0.116 R)
• M48: 25,833,009 km (0.102 R)
• M49: 27,717,643 km (0.099 R)
• M50: 28,158,957 km (0.096 R)
• M51: 28,306,460 km (0.096 R)
• M52: 28,454,263 km (0.068 R)
• M53: 28,528,314 km (0.09 R)
• M54: 29,571,310 km (0.111 R)
• M55: 30,022,049 km (0.104 R)
• M56: 30,550,877 km (0.106 R)
• M57: 31,006,552 km (0.115 R)
• M58: 31,387,877 km (0.12 R)
• M59: 33,474,468 km (0.1 R)
• M60: 34,022,745 km (0.112 R)
• M61: 34,416,187 km (0.094 R)
• M62: 34,890,263 km (0.096 R)
• M63: 36,245,171 km (0.098 R)
• M64: 36,888,741 km (0.101 R)
• M65: 38,105,570 km (0.087 R)
• M66: 38,187,100 km (0.091 R)
• M67: 38,432,291 km (0.054 R)
• M68: 38,595,951 km (0.089 R)
• M69: 38,759,911 km (0.075 R)
• M70: 40,828,400 km (0.076 R)
• M71: 42,932,644 km (0.112 R)
• M72: 43,017,466 km (0.081 R)
• M73: 45,590,250 km (0.085 R)
• M74: 45,676,867 km (0.069 R)
• M75: 46,110,851 km (0.087 R)
• M76: 50,255,759 km (0.062 R)
• M77: 50,613,896 km (0.109 R)
• M78: 51,693,694 km (0.096 R)
• M79: 52,417,748 km (0.093 R)
• M80: 54,334,246 km (0.097 R)
• M81: 54,701,957 km (0.08 R)
• M82: 55,162,569 km (0.111 R)
• M83: 55,347,323 km (0.092 R)
• M84: 56,273,633 km (0.061 R)
• M85: 56,552,483 km (0.079 R)
• M86: 56,738,732 km (0.089 R)
• M87: 57,485,525 km (0.117 R)
• M88: 57,766,320 km (0.074 R)
• M89: 57,860,118 km (0.092 R)
• M90: 60,600,153 km (0.078 R)
• M91: 61,938,006 km (0.093 R)
• M92: 62,033,899 km (0.086 R)
• M93: 63,478,864 km (0.119 R)
• M94: 64,837,512 km (0.116 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: 310 - 18,723 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit