🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.5 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 481.5

Radius: 15

Gravity: 2.14 G

Time & Orbit

Eccentricity (e): 0.001

Orbit Range: 1 AU - 1 AU

Year: 690 Days

Day: 9.8 Hours

Environment

Temp: -175 °C

Axial Tilt: 4.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (39)

Outer Limit: 63,002,101 km

• M1: 187,147 km (0.086 R)
• M2: 284,086 km (0.082 R)
• M3: 529,128 km (0.075 R)
• M4: 706,700 km (0.055 R)
• M5: 816,056 km (0.077 R)
• M6: 1,044,044 km (0.031 R)
• M7: 1,166,564 km (0.085 R)
• M8: 1,277,416 km (0.099 R)
• M9: 1,498,671 km (0.076 R)
• M10: 1,688,960 km (0.057 R)
• M11: 1,829,283 km (0.069 R)
• M12: 1,953,599 km (0.08 R)
• M13: 2,081,056 km (0.11 R)
• M14: 2,204,325 km (0.091 R)
• M15: 2,358,710 km (0.057 R)
• M16: 2,775,639 km (0.096 R)
• M17: 2,935,260 km (0.118 R)
• M18: 3,168,782 km (0.101 R)
• M19: 3,376,274 km (0.063 R)
• M20: 3,588,255 km (0.056 R)
• M21: 3,729,325 km (0.08 R)
• M22: 3,863,963 km (0.097 R)
• M23: 4,060,236 km (0.069 R)
• M24: 4,190,087 km (0.076 R)
• M25: 4,409,547 km (0.111 R)
• M26: 4,642,022 km (0.074 R)
• M27: 4,906,062 km (0.091 R)
• M28: 5,306,835 km (0.116 R)
• M29: 5,487,399 km (0.098 R)
• M30: 5,641,037 km (0.092 R)
• M31: 5,805,893 km (0.114 R)
• M32: 5,913,454 km (0.112 R)
• M33: 6,061,107 km (0.051 R)
• M34: 6,170,314 km (0.077 R)
• M35: 6,390,522 km (0.091 R)
• M36: 6,633,768 km (0.108 R)
• M37: 6,838,867 km (0.075 R)
• M38: 7,014,943 km (0.099 R)
• M39: 7,129,685 km (0.057 R)

Planet 2 - Gas Giant

Semi-Major Axis: 2.45 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 950.8

Radius: 11.3

Gravity: 7.45 G

Time & Orbit

Eccentricity (e): 0.116

Orbit Range: 2.17 AU - 2.73 AU

Year: 2647 Days

Day: 11.4 Hours

Environment

Temp: -208 °C

Axial Tilt: 15.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 63,002,101 km

• M1: 148,251 km (0.063 R)
• M2: 237,711 km (0.061 R)
• M3: 309,219 km (0.119 R)
• M4: 446,400 km (0.052 R)
• M5: 520,301 km (0.105 R)
• M6: 636,090 km (0.12 R)
• M7: 771,775 km (0.119 R)
• M8: 854,054 km (0.088 R)
• M9: 1,143,526 km (0.106 R)
• M10: 1,300,155 km (0.117 R)
• M11: 1,464,264 km (0.078 R)
• M12: 1,689,259 km (0.077 R)
• M13: 1,841,101 km (0.111 R)
• M14: 1,997,580 km (0.097 R)
• M15: 2,114,267 km (0.104 R)
• M16: 2,845,501 km (0.112 R)
• M17: 3,010,807 km (0.081 R)
• M18: 3,420,555 km (0.077 R)
• M19: 4,161,214 km (0.11 R)
• M20: 4,311,560 km (0.079 R)
• M21: 4,501,998 km (0.115 R)
• M22: 4,970,389 km (0.06 R)
• M23: 5,598,551 km (0.08 R)
• M24: 5,764,754 km (0.118 R)
• M25: 6,294,929 km (0.079 R)
• M26: 6,642,295 km (0.113 R)
• M27: 6,774,240 km (0.117 R)
• M28: 6,862,802 km (0.098 R)
• M29: 7,085,554 km (0.059 R)
• M30: 7,265,520 km (0.114 R)
• M31: 7,561,275 km (0.099 R)
• M32: 7,837,881 km (0.097 R)
• M33: 8,094,292 km (0.101 R)
• M34: 8,519,898 km (0.091 R)
• M35: 9,815,266 km (0.062 R)
• M36: 9,965,761 km (0.092 R)
• M37: 10,117,005 km (0.087 R)
• M38: 10,218,283 km (0.113 R)
• M39: 10,421,885 km (0.086 R)
• M40: 10,524,210 km (0.082 R)
• M41: 10,601,104 km (0.086 R)
• M42: 10,859,010 km (0.117 R)
• M43: 10,988,712 km (0.103 R)
• M44: 11,145,041 km (0.068 R)
• M45: 11,937,760 km (0.077 R)
• M46: 12,018,095 km (0.042 R)
• M47: 12,341,076 km (0.063 R)
• M48: 13,133,347 km (0.043 R)
• M49: 13,327,076 km (0.094 R)
• M50: 13,577,503 km (0.119 R)
• M51: 13,773,326 km (0.091 R)
• M52: 14,480,625 km (0.116 R)
• M53: 14,594,918 km (0.057 R)
• M54: 14,881,847 km (0.115 R)
• M55: 15,695,360 km (0.111 R)
• M56: 15,989,469 km (0.088 R)
• M57: 16,374,385 km (0.066 R)
• M58: 16,672,533 km (0.057 R)
• M59: 16,822,430 km (0.073 R)
• M60: 17,365,321 km (0.085 R)
• M61: 17,547,681 km (0.109 R)
• M62: 18,252,287 km (0.032 R)
• M63: 18,468,456 km (0.119 R)
• M64: 18,779,021 km (0.105 R)
• M65: 19,122,497 km (0.067 R)
• M66: 19,279,276 km (0.107 R)
• M67: 19,625,894 km (0.073 R)
• M68: 19,815,734 km (0.038 R)
• M69: 20,261,236 km (0.081 R)
• M70: 20,710,030 km (0.089 R)
• M71: 21,194,578 km (0.111 R)
• M72: 21,291,816 km (0.1 R)
• M73: 21,487,041 km (0.108 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 769.9

Radius: 11.3

Gravity: 6.03 G

Time & Orbit

Eccentricity (e): 0.047

Orbit Range: 2.51 AU - 2.75 AU

Year: 2944 Days

Day: 12.9 Hours

Environment

Temp: -218 °C

Axial Tilt: 10.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (66)

Outer Limit: 63,002,101 km

• M1: 169,345 km (0.047 R)
• M2: 290,220 km (0.109 R)
• M3: 392,994 km (0.096 R)
• M4: 555,158 km (0.109 R)
• M5: 636,389 km (0.092 R)
• M6: 950,994 km (0.077 R)
• M7: 1,051,523 km (0.076 R)
• M8: 1,288,486 km (0.069 R)
• M9: 1,529,937 km (0.031 R)
• M10: 1,663,080 km (0.089 R)
• M11: 1,772,436 km (0.1 R)
• M12: 1,941,182 km (0.066 R)
• M13: 2,189,514 km (0.057 R)
• M14: 2,912,820 km (0.115 R)
• M15: 3,266,470 km (0.036 R)
• M16: 3,651,834 km (0.07 R)
• M17: 3,759,544 km (0.1 R)
• M18: 3,868,302 km (0.092 R)
• M19: 3,978,107 km (0.086 R)
• M20: 4,389,650 km (0.076 R)
• M21: 4,973,082 km (0.111 R)
• M22: 5,416,490 km (0.075 R)
• M23: 5,642,981 km (0.1 R)
• M24: 6,084,295 km (0.115 R)
• M25: 6,298,220 km (0.068 R)
• M26: 6,492,996 km (0.119 R)
• M27: 6,645,885 km (0.1 R)
• M28: 7,156,762 km (0.105 R)
• M29: 7,246,970 km (0.067 R)
• M30: 7,337,476 km (0.085 R)
• M31: 7,473,910 km (0.037 R)
• M32: 7,772,657 km (0.074 R)
• M33: 7,865,258 km (0.084 R)
• M34: 8,524,535 km (0.074 R)
• M35: 8,885,066 km (0.091 R)
• M36: 9,128,163 km (0.094 R)
• M37: 9,422,721 km (0.037 R)
• M38: 9,521,755 km (0.099 R)
• M39: 9,596,105 km (0.099 R)
• M40: 9,895,750 km (0.082 R)
• M41: 9,996,279 km (0.12 R)
• M42: 10,658,399 km (0.079 R)
• M43: 11,334,582 km (0.116 R)
• M44: 11,971,121 km (0.103 R)
• M45: 12,510,421 km (0.065 R)
• M46: 12,728,385 km (0.09 R)
• M47: 12,837,891 km (0.075 R)
• M48: 12,947,696 km (0.078 R)
• M49: 13,085,326 km (0.09 R)
• M50: 13,278,905 km (0.067 R)
• M51: 13,501,208 km (0.108 R)
• M52: 14,006,101 km (0.05 R)
• M53: 14,175,745 km (0.056 R)
• M54: 14,517,127 km (0.116 R)
• M55: 14,890,074 km (0.071 R)
• M56: 15,528,259 km (0.106 R)
• M57: 15,674,566 km (0.057 R)
• M58: 16,442,900 km (0.092 R)
• M59: 16,711,728 km (0.115 R)
• M60: 17,557,255 km (0.118 R)
• M61: 17,954,587 km (0.115 R)
• M62: 18,293,127 km (0.106 R)
• M63: 20,496,404 km (0.034 R)
• M64: 20,785,727 km (0.09 R)
• M65: 20,882,516 km (0.075 R)
• M66: 21,011,769 km (0.082 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.34 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 693.1

Radius: 11.6

Gravity: 5.15 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 3.23 AU - 3.45 AU

Year: 4213 Days

Day: 8.9 Hours

Environment

Temp: -218 °C

Axial Tilt: 35 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 63,002,101 km

• M1: 145,110 km (0.034 R)
• M2: 436,078 km (0.106 R)
• M3: 549,473 km (0.096 R)
• M4: 752,926 km (0.053 R)
• M5: 931,995 km (0.073 R)
• M6: 1,033,572 km (0.086 R)
• M7: 1,234,631 km (0.098 R)
• M8: 1,538,315 km (0.097 R)
• M9: 1,801,757 km (0.093 R)
• M10: 1,930,860 km (0.095 R)
• M11: 2,130,573 km (0.091 R)
• M12: 2,267,455 km (0.063 R)
• M13: 2,496,340 km (0.075 R)
• M14: 2,622,899 km (0.088 R)
• M15: 3,307,160 km (0.108 R)
• M16: 3,446,585 km (0.059 R)
• M17: 3,960,304 km (0.044 R)
• M18: 4,044,827 km (0.066 R)
• M19: 4,367,061 km (0.068 R)
• M20: 4,720,112 km (0.114 R)
• M21: 4,809,871 km (0.114 R)
• M22: 4,991,034 km (0.116 R)
• M23: 6,076,366 km (0.075 R)
• M24: 6,396,057 km (0.084 R)
• M25: 7,077,774 km (0.085 R)
• M26: 7,232,309 km (0.104 R)
• M27: 7,414,220 km (0.057 R)
• M28: 7,544,969 km (0.09 R)
• M29: 7,650,286 km (0.09 R)
• M30: 7,915,523 km (0.089 R)
• M31: 8,183,752 km (0.079 R)
• M32: 8,427,746 km (0.096 R)
• M33: 8,784,537 km (0.06 R)
• M34: 9,006,540 km (0.073 R)
• M35: 9,399,533 km (0.04 R)
• M36: 10,523,911 km (0.093 R)
• M37: 10,671,115 km (0.051 R)
• M38: 10,967,618 km (0.101 R)
• M39: 11,146,837 km (0.115 R)
• M40: 11,568,852 km (0.12 R)
• M41: 11,659,957 km (0.095 R)
• M42: 12,335,392 km (0.103 R)
• M43: 13,055,107 km (0.111 R)
• M44: 13,628,067 km (0.077 R)
• M45: 14,046,791 km (0.086 R)
• M46: 14,176,493 km (0.059 R)
• M47: 14,633,813 km (0.118 R)
• M48: 15,663,346 km (0.075 R)
• M49: 16,034,349 km (0.064 R)
• M50: 16,135,926 km (0.083 R)
• M51: 16,305,869 km (0.099 R)
• M52: 17,442,513 km (0.082 R)
• M53: 17,581,939 km (0.111 R)
• M54: 17,791,974 km (0.094 R)
• M55: 18,073,218 km (0.111 R)
• M56: 18,497,777 km (0.036 R)
• M57: 18,604,440 km (0.088 R)
• M58: 18,854,119 km (0.084 R)
• M59: 19,356,917 km (0.041 R)
• M60: 19,465,226 km (0.084 R)
• M61: 19,864,054 km (0.045 R)
• M62: 20,302,226 km (0.104 R)
• M63: 20,854,542 km (0.074 R)
• M64: 21,076,844 km (0.086 R)
• M65: 21,411,794 km (0.077 R)
• M66: 21,486,443 km (0.116 R)
• M67: 21,673,440 km (0.1 R)
• M68: 22,464,963 km (0.064 R)
• M69: 22,807,093 km (0.112 R)
• M70: 23,265,910 km (0.11 R)
• M71: 23,650,675 km (0.106 R)
• M72: 23,766,464 km (0.073 R)
• M73: 23,921,148 km (0.094 R)
• M74: 25,249,877 km (0.054 R)
• M75: 26,042,745 km (0.064 R)
• M76: 27,004,809 km (0.048 R)

Planet 5 - Ice Giant

Semi-Major Axis: 5.67 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 325.9

Radius: 7.5

Gravity: 5.79 G

Time & Orbit

Eccentricity (e): 0

Orbit Range: 5.67 AU - 5.67 AU

Year: 9319 Days

Day: 17.9 Hours

Environment

Temp: -236 °C

Axial Tilt: 38.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 63,002,101 km

• M1: 123,717 km (0.117 R)
• M2: 179,218 km (0.093 R)
• M3: 378,183 km (0.032 R)
• M4: 433,235 km (0.116 R)
• M5: 565,181 km (0.118 R)
• M6: 752,776 km (0.108 R)
• M7: 869,014 km (0.091 R)
• M8: 1,038,658 km (0.073 R)
• M9: 1,287,589 km (0.119 R)
• M10: 1,500,167 km (0.088 R)
• M11: 1,723,966 km (0.108 R)
• M12: 2,079,710 km (0.111 R)
• M13: 2,611,231 km (0.098 R)
• M14: 2,812,590 km (0.115 R)
• M15: 2,880,806 km (0.1 R)
• M16: 3,230,566 km (0.03 R)
• M17: 3,326,009 km (0.036 R)
• M18: 3,995,460 km (0.113 R)
• M19: 4,123,965 km (0.08 R)
• M20: 4,279,995 km (0.03 R)
• M21: 4,332,354 km (0.072 R)
• M22: 4,705,451 km (0.109 R)
• M23: 5,033,520 km (0.12 R)
• M24: 5,856,757 km (0.094 R)
• M25: 6,508,854 km (0.094 R)
• M26: 6,569,291 km (0.113 R)
• M27: 6,660,247 km (0.087 R)
• M28: 7,246,371 km (0.077 R)
• M29: 7,752,610 km (0.045 R)
• M30: 7,913,279 km (0.071 R)
• M31: 8,139,919 km (0.12 R)
• M32: 8,270,369 km (0.085 R)
• M33: 9,135,344 km (0.104 R)
• M34: 9,304,988 km (0.072 R)
• M35: 9,647,417 km (0.098 R)
• M36: 9,959,179 km (0.111 R)
• M37: 10,063,748 km (0.084 R)
• M38: 11,897,967 km (0.088 R)
• M39: 12,046,219 km (0.106 R)
• M40: 12,306,968 km (0.109 R)
• M41: 12,871,999 km (0.108 R)
• M42: 13,599,942 km (0.066 R)
• M43: 14,105,733 km (0.114 R)
• M44: 15,095,472 km (0.048 R)
• M45: 15,740,688 km (0.117 R)
• M46: 16,271,611 km (0.099 R)
• M47: 16,477,308 km (0.089 R)
• M48: 16,601,175 km (0.068 R)
• M49: 18,324,842 km (0.1 R)
• M50: 19,142,693 km (0.097 R)
• M51: 20,060,476 km (0.098 R)
• M52: 20,369,545 km (0.079 R)
• M53: 20,635,680 km (0.095 R)
• M54: 21,037,201 km (0.117 R)
• M55: 21,216,419 km (0.111 R)
• M56: 21,893,200 km (0.044 R)
• M57: 22,348,276 km (0.102 R)
• M58: 22,439,681 km (0.045 R)
• M59: 22,622,938 km (0.066 R)
• M60: 22,714,641 km (0.075 R)
• M61: 22,898,497 km (0.093 R)
• M62: 24,293,647 km (0.041 R)
• M63: 24,528,815 km (0.102 R)
• M64: 24,575,938 km (0.093 R)
• M65: 25,524,837 km (0.085 R)
• M66: 25,716,024 km (0.117 R)
• M67: 27,311,634 km (0.105 R)
• M68: 28,640,812 km (0.118 R)
• M69: 28,740,145 km (0.105 R)
• M70: 28,889,294 km (0.112 R)
• M71: 29,238,305 km (0.089 R)
• M72: 29,388,352 km (0.092 R)
• M73: 29,588,813 km (0.093 R)
• M74: 29,789,574 km (0.117 R)
• M75: 29,839,838 km (0.043 R)
• M76: 30,243,304 km (0.053 R)
• M77: 30,851,718 km (0.12 R)
• M78: 31,310,535 km (0.063 R)
• M79: 32,029,054 km (0.08 R)
• M80: 32,390,183 km (0.101 R)
• M81: 32,700,898 km (0.082 R)
• M82: 33,012,660 km (0.095 R)
• M83: 33,743,745 km (0.075 R)
• M84: 34,216,623 km (0.111 R)
• M85: 35,115,707 km (0.109 R)
• M86: 35,541,612 km (0.028 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.53 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 526

Radius: 3.5

Gravity: 42.94 G

Time & Orbit

Eccentricity (e): 0.181

Orbit Range: 6.99 AU - 10.07 AU

Year: 17196 Days

Day: 16.3 Hours

Environment

Temp: -233 °C

Axial Tilt: 12.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 63,002,101 km

• M1: 307,424 km (0.117 R)
• M2: 455,825 km (0.091 R)
• M3: 685,009 km (0.098 R)
• M4: 1,336,657 km (0.101 R)
• M5: 1,631,365 km (0.058 R)
• M6: 1,858,006 km (0.057 R)
• M7: 2,627,986 km (0.114 R)
• M8: 3,028,609 km (0.109 R)
• M9: 3,166,389 km (0.118 R)
• M10: 3,448,081 km (0.117 R)
• M11: 3,848,405 km (0.116 R)
• M12: 4,072,802 km (0.06 R)
• M13: 5,423,222 km (0.04 R)
• M14: 5,674,696 km (0.115 R)
• M15: 6,059,013 km (0.109 R)
• M16: 6,584,550 km (0.095 R)
• M17: 6,762,871 km (0.029 R)
• M18: 6,807,750 km (0.074 R)
• M19: 6,852,630 km (0.068 R)
• M20: 6,897,659 km (0.111 R)
• M21: 7,866,155 km (0.098 R)
• M22: 8,294,155 km (0.092 R)
• M23: 8,390,197 km (0.079 R)
• M24: 8,438,367 km (0.111 R)
• M25: 8,486,687 km (0.106 R)
• M26: 8,632,096 km (0.109 R)
• M27: 8,827,322 km (0.044 R)
• M28: 9,471,789 km (0.093 R)
• M29: 9,521,904 km (0.108 R)
• M30: 10,337,063 km (0.096 R)
• M31: 11,227,171 km (0.109 R)
• M32: 11,440,198 km (0.105 R)
• M33: 12,087,358 km (0.073 R)
• M34: 12,415,277 km (0.079 R)
• M35: 13,247,939 km (0.068 R)
• M36: 14,041,107 km (0.08 R)
• M37: 14,385,780 km (0.099 R)
• M38: 15,083,505 km (0.105 R)
• M39: 15,142,147 km (0.055 R)
• M40: 15,259,581 km (0.103 R)
• M41: 15,377,464 km (0.074 R)
• M42: 17,919,880 km (0.09 R)
• M43: 19,814,088 km (0.111 R)
• M44: 20,071,397 km (0.086 R)
• M45: 20,200,350 km (0.097 R)
• M46: 20,784,679 km (0.084 R)
• M47: 21,177,224 km (0.038 R)
• M48: 23,787,857 km (0.085 R)
• M49: 24,542,428 km (0.105 R)
• M50: 25,513,917 km (0.118 R)
• M51: 26,427,361 km (0.068 R)
• M52: 26,994,637 km (0.091 R)
• M53: 27,925,285 km (0.074 R)
• M54: 28,430,627 km (0.053 R)
• M55: 29,084,818 km (0.088 R)
• M56: 31,151,662 km (0.092 R)
• M57: 31,750,951 km (0.118 R)
• M58: 31,826,049 km (0.093 R)
• M59: 33,418,220 km (0.047 R)
• M60: 33,494,664 km (0.083 R)
• M61: 35,502,866 km (0.12 R)
• M62: 36,679,154 km (0.098 R)
• M63: 38,107,514 km (0.077 R)
• M64: 38,667,758 km (0.108 R)
• M65: 39,796,624 km (0.077 R)
• M66: 42,251,824 km (0.077 R)
• M67: 42,417,279 km (0.111 R)
• M68: 43,581,151 km (0.081 R)
• M69: 43,748,252 km (0.111 R)
• M70: 43,832,027 km (0.049 R)
• M71: 44,755,494 km (0.079 R)
• M72: 44,839,867 km (0.068 R)
• M73: 45,685,544 km (0.081 R)
• M74: 46,451,186 km (0.063 R)
• M75: 47,135,297 km (0.038 R)
• M76: 47,822,849 km (0.099 R)
• M77: 48,513,542 km (0.073 R)
• M78: 49,120,760 km (0.082 R)
• M79: 50,079,832 km (0.051 R)
• M80: 50,255,011 km (0.116 R)
• M81: 50,605,669 km (0.086 R)
• M82: 52,994,148 km (0.059 R)
• M83: 54,877,137 km (0.111 R)
• M84: 55,781,456 km (0.065 R)
• M85: 56,326,441 km (0.092 R)
• M86: 57,330,093 km (0.043 R)
• M87: 57,421,647 km (0.085 R)
• M88: 58,155,723 km (0.084 R)
• M89: 58,985,244 km (0.087 R)
• M90: 59,818,653 km (0.092 R)
• M91: 60,655,953 km (0.068 R)
• M92: 61,216,346 km (0.055 R)
• M93: 61,497,141 km (0.031 R)
• M94: 62,813,304 km (0.099 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 234 - 14,192 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit