🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.4 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.79 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 681.5

Radius: 12.2

Gravity: 4.58 G

Time & Orbit

Eccentricity (e): 0.16

Orbit Range: 0.66 AU - 0.92 AU

Year: 494 Days

Day: 7.4 Hours

Environment

Temp: -161 °C

Axial Tilt: 38.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (40)

Outer Limit: 39,675,034 km

• M1: 157,975 km (0.108 R)
• M2: 241,750 km (0.069 R)
• M3: 344,524 km (0.085 R)
• M4: 442,959 km (0.109 R)
• M5: 561,590 km (0.085 R)
• M6: 761,004 km (0.039 R)
• M7: 845,228 km (0.1 R)
• M8: 1,038,658 km (0.04 R)
• M9: 1,118,394 km (0.102 R)
• M10: 1,195,137 km (0.103 R)
• M11: 1,289,833 km (0.079 R)
• M12: 1,464,713 km (0.116 R)
• M13: 1,790,088 km (0.105 R)
• M14: 1,905,877 km (0.098 R)
• M15: 2,183,979 km (0.083 R)
• M16: 2,268,652 km (0.067 R)
• M17: 2,354,521 km (0.101 R)
• M18: 2,475,246 km (0.036 R)
• M19: 2,674,212 km (0.065 R)
• M20: 2,751,105 km (0.081 R)
• M21: 2,850,139 km (0.036 R)
• M22: 3,161,751 km (0.088 R)
• M23: 3,370,590 km (0.03 R)
• M24: 3,499,693 km (0.072 R)
• M25: 3,747,277 km (0.049 R)
• M26: 3,841,524 km (0.105 R)
• M27: 3,928,739 km (0.083 R)
• M28: 4,317,095 km (0.112 R)
• M29: 4,440,962 km (0.113 R)
• M30: 4,684,059 km (0.099 R)
• M31: 4,957,225 km (0.113 R)
• M32: 5,052,369 km (0.075 R)
• M33: 5,253,428 km (0.117 R)
• M34: 5,376,996 km (0.04 R)
• M35: 5,573,269 km (0.093 R)
• M36: 5,663,327 km (0.06 R)
• M37: 5,762,959 km (0.042 R)
• M38: 5,881,291 km (0.091 R)
• M39: 5,991,395 km (0.109 R)
• M40: 6,241,672 km (0.108 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.93 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 785.5

Radius: 14

Gravity: 4.01 G

Time & Orbit

Eccentricity (e): 0.138

Orbit Range: 0.8 AU - 1.06 AU

Year: 630 Days

Day: 8.7 Hours

Environment

Temp: -180 °C

Axial Tilt: 23.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (45)

Outer Limit: 39,675,034 km

• M1: 180,714 km (0.114 R)
• M2: 285,433 km (0.115 R)
• M3: 497,263 km (0.07 R)
• M4: 598,840 km (0.105 R)
• M5: 777,610 km (0.037 R)
• M6: 949,049 km (0.07 R)
• M7: 1,059,602 km (0.035 R)
• M8: 1,157,439 km (0.112 R)
• M9: 1,331,870 km (0.108 R)
• M10: 1,594,414 km (0.085 R)
• M11: 1,825,094 km (0.097 R)
• M12: 1,944,772 km (0.1 R)
• M13: 2,038,271 km (0.102 R)
• M14: 2,312,484 km (0.12 R)
• M15: 2,614,971 km (0.097 R)
• M16: 2,791,347 km (0.118 R)
• M17: 2,922,245 km (0.057 R)
• M18: 3,130,934 km (0.099 R)
• M19: 3,250,014 km (0.054 R)
• M20: 3,387,943 km (0.082 R)
• M21: 3,475,159 km (0.051 R)
• M22: 3,563,272 km (0.051 R)
• M23: 3,678,761 km (0.03 R)
• M24: 3,822,824 km (0.068 R)
• M25: 4,070,259 km (0.078 R)
• M26: 4,200,559 km (0.1 R)
• M27: 4,294,656 km (0.05 R)
• M28: 4,513,517 km (0.076 R)
• M29: 4,668,052 km (0.098 R)
• M30: 4,824,382 km (0.081 R)
• M31: 5,192,542 km (0.073 R)
• M32: 5,436,387 km (0.103 R)
• M33: 5,528,689 km (0.111 R)
• M34: 5,809,185 km (0.117 R)
• M35: 5,924,824 km (0.115 R)
• M36: 6,041,211 km (0.078 R)
• M37: 6,190,360 km (0.064 R)
• M38: 6,394,860 km (0.095 R)
• M39: 6,558,071 km (0.09 R)
• M40: 6,711,409 km (0.038 R)
• M41: 6,832,883 km (0.084 R)
• M42: 6,977,394 km (0.109 R)
• M43: 7,246,820 km (0.082 R)
• M44: 7,371,435 km (0.104 R)
• M45: 7,531,206 km (0.102 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.76 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 627.6

Radius: 9.7

Gravity: 6.67 G

Time & Orbit

Eccentricity (e): 0.005

Orbit Range: 3.74 AU - 3.78 AU

Year: 5125 Days

Day: 5.8 Hours

Environment

Temp: -214 °C

Axial Tilt: 25.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 39,675,034 km

• M1: 128,205 km (0.076 R)
• M2: 245,191 km (0.092 R)
• M3: 376,239 km (0.108 R)
• M4: 442,660 km (0.083 R)
• M5: 503,696 km (0.082 R)
• M6: 579,093 km (0.036 R)
• M7: 730,486 km (0.057 R)
• M8: 935,735 km (0.085 R)
• M9: 1,031,627 km (0.086 R)
• M10: 1,263,504 km (0.109 R)
• M11: 1,339,649 km (0.112 R)
• M12: 1,676,095 km (0.101 R)
• M13: 2,092,725 km (0.091 R)
• M14: 2,294,383 km (0.069 R)
• M15: 2,483,474 km (0.092 R)
• M16: 2,677,503 km (0.08 R)
• M17: 2,856,571 km (0.119 R)
• M18: 3,019,035 km (0.096 R)
• M19: 3,205,583 km (0.084 R)
• M20: 3,417,414 km (0.097 R)
• M21: 4,102,722 km (0.081 R)
• M22: 4,472,976 km (0.107 R)
• M23: 4,805,981 km (0.084 R)
• M24: 4,951,091 km (0.114 R)
• M25: 5,146,915 km (0.081 R)
• M26: 5,596,905 km (0.072 R)
• M27: 6,216,390 km (0.108 R)
• M28: 6,587,991 km (0.092 R)
• M29: 6,857,866 km (0.094 R)
• M30: 7,241,734 km (0.043 R)
• M31: 8,116,582 km (0.029 R)
• M32: 8,347,711 km (0.096 R)
• M33: 8,875,941 km (0.118 R)
• M34: 9,173,940 km (0.04 R)
• M35: 9,264,147 km (0.102 R)
• M36: 11,351,636 km (0.115 R)
• M37: 11,416,113 km (0.083 R)
• M38: 11,642,753 km (0.118 R)
• M39: 11,903,652 km (0.086 R)
• M40: 12,001,938 km (0.05 R)
• M41: 12,597,637 km (0.08 R)
• M42: 13,236,719 km (0.092 R)
• M43: 13,338,595 km (0.102 R)
• M44: 13,817,607 km (0.115 R)
• M45: 13,920,979 km (0.094 R)
• M46: 15,110,432 km (0.075 R)
• M47: 15,789,307 km (0.102 R)
• M48: 15,969,722 km (0.047 R)
• M49: 16,734,467 km (0.103 R)
• M50: 17,362,179 km (0.054 R)
• M51: 17,810,075 km (0.09 R)
• M52: 18,110,767 km (0.06 R)
• M53: 18,564,797 km (0.108 R)
• M54: 18,755,235 km (0.034 R)
• M55: 18,907,974 km (0.098 R)
• M56: 18,984,419 km (0.033 R)
• M57: 19,061,162 km (0.111 R)
• M58: 20,497,302 km (0.116 R)
• M59: 20,694,023 km (0.057 R)
• M60: 20,851,849 km (0.08 R)
• M61: 21,089,410 km (0.041 R)
• M62: 21,168,847 km (0.093 R)
• M63: 21,807,330 km (0.08 R)
• M64: 21,967,999 km (0.082 R)
• M65: 22,330,923 km (0.107 R)
• M66: 22,452,396 km (0.1 R)
• M67: 22,980,926 km (0.045 R)
• M68: 23,103,596 km (0.116 R)
• M69: 23,226,266 km (0.095 R)
• M70: 23,390,375 km (0.104 R)
• M71: 23,554,783 km (0.113 R)
• M72: 23,760,929 km (0.113 R)
• M73: 23,926,235 km (0.108 R)
• M74: 24,758,597 km (0.102 R)
• M75: 25,515,712 km (0.079 R)
• M76: 26,152,550 km (0.039 R)
• M77: 26,494,381 km (0.091 R)
• M78: 27,528,551 km (0.087 R)
• M79: 27,702,235 km (0.064 R)
• M80: 28,312,893 km (0.094 R)
• M81: 28,400,408 km (0.096 R)
• M82: 28,575,886 km (0.105 R)
• M83: 28,663,850 km (0.116 R)
• M84: 29,060,284 km (0.117 R)
• M85: 29,237,109 km (0.105 R)
• M86: 29,325,671 km (0.118 R)
• M87: 29,414,382 km (0.095 R)
• M88: 29,769,677 km (0.114 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.24 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 431.7

Radius: 10

Gravity: 4.32 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 3.96 AU - 4.52 AU

Year: 6137 Days

Day: 10.5 Hours

Environment

Temp: -221 °C

Axial Tilt: 20.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 39,675,034 km

• M1: 153,936 km (0.079 R)
• M2: 255,513 km (0.067 R)
• M3: 719,267 km (0.052 R)
• M4: 843,882 km (0.105 R)
• M5: 962,513 km (0.072 R)
• M6: 1,072,916 km (0.083 R)
• M7: 1,261,858 km (0.032 R)
• M8: 1,399,189 km (0.094 R)
• M9: 1,493,585 km (0.074 R)
• M10: 1,705,715 km (0.094 R)
• M11: 2,069,238 km (0.025 R)
• M12: 2,456,995 km (0.119 R)
• M13: 2,591,334 km (0.094 R)
• M14: 2,948,125 km (0.107 R)
• M15: 3,194,812 km (0.111 R)
• M16: 3,384,203 km (0.114 R)
• M17: 3,534,250 km (0.094 R)
• M18: 3,730,223 km (0.094 R)
• M19: 4,178,867 km (0.102 R)
• M20: 4,316,796 km (0.051 R)
• M21: 4,692,137 km (0.096 R)
• M22: 5,200,620 km (0.103 R)
• M23: 5,474,085 km (0.067 R)
• M24: 5,650,611 km (0.074 R)
• M25: 6,534,585 km (0.099 R)
• M26: 6,748,809 km (0.108 R)
• M27: 6,856,818 km (0.042 R)
• M28: 7,047,256 km (0.102 R)
• M29: 7,239,490 km (0.075 R)
• M30: 7,516,994 km (0.111 R)
• M31: 7,769,814 km (0.083 R)
• M32: 7,968,331 km (0.076 R)
• M33: 8,139,919 km (0.093 R)
• M34: 8,254,960 km (0.117 R)
• M35: 8,926,954 km (0.047 R)
• M36: 9,404,919 km (0.093 R)
• M37: 10,075,716 km (0.093 R)
• M38: 10,199,284 km (0.092 R)
• M39: 10,573,129 km (0.057 R)
• M40: 10,635,960 km (0.113 R)
• M41: 10,698,791 km (0.1 R)
• M42: 10,761,772 km (0.082 R)
• M43: 10,919,897 km (0.045 R)
• M44: 11,015,041 km (0.066 R)
• M45: 11,398,610 km (0.09 R)
• M46: 11,592,189 km (0.075 R)
• M47: 12,675,577 km (0.061 R)
• M48: 13,381,829 km (0.072 R)
• M49: 13,688,355 km (0.113 R)
• M50: 13,997,274 km (0.073 R)
• M51: 14,447,564 km (0.088 R)
• M52: 14,621,995 km (0.096 R)
• M53: 15,184,932 km (0.093 R)
• M54: 15,469,168 km (0.067 R)
• M55: 16,332,198 km (0.082 R)
• M56: 17,655,840 km (0.114 R)
• M57: 17,917,187 km (0.075 R)
• M58: 18,481,620 km (0.09 R)
• M59: 18,747,007 km (0.06 R)
• M60: 19,550,796 km (0.078 R)
• M61: 20,405,000 km (0.109 R)
• M62: 21,390,252 km (0.091 R)
• M63: 21,868,815 km (0.093 R)
• M64: 22,795,724 km (0.117 R)
• M65: 23,080,408 km (0.085 R)
• M66: 23,858,916 km (0.101 R)
• M67: 24,313,693 km (0.117 R)
• M68: 24,896,526 km (0.047 R)
• M69: 25,231,626 km (0.095 R)
• M70: 25,694,930 km (0.062 R)
• M71: 26,801,057 km (0.107 R)
• M72: 27,101,449 km (0.102 R)
• M73: 27,230,702 km (0.071 R)
• M74: 27,662,441 km (0.08 R)
• M75: 27,966,125 km (0.112 R)
• M76: 28,096,574 km (0.081 R)
• M77: 28,314,539 km (0.109 R)
• M78: 28,795,945 km (0.12 R)
• M79: 29,015,554 km (0.112 R)
• M80: 29,412,437 km (0.078 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.29 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 201.7

Radius: 9.9

Gravity: 2.06 G

Time & Orbit

Eccentricity (e): 0.187

Orbit Range: 4.3 AU - 6.28 AU

Year: 8552 Days

Day: 9.2 Hours

Environment

Temp: -233 °C

Axial Tilt: 7.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 39,675,034 km

• M1: 136,433 km (0.085 R)
• M2: 286,929 km (0.103 R)
• M3: 734,376 km (0.065 R)
• M4: 908,508 km (0.082 R)
• M5: 1,014,274 km (0.104 R)
• M6: 1,342,192 km (0.116 R)
• M7: 1,433,297 km (0.104 R)
• M8: 1,526,497 km (0.104 R)
• M9: 1,621,791 km (0.102 R)
• M10: 1,752,090 km (0.115 R)
• M11: 1,971,251 km (0.051 R)
• M12: 2,271,644 km (0.098 R)
• M13: 2,511,150 km (0.096 R)
• M14: 2,586,697 km (0.116 R)
• M15: 3,035,042 km (0.047 R)
• M16: 3,340,670 km (0.077 R)
• M17: 3,403,052 km (0.081 R)
• M18: 4,384,564 km (0.087 R)
• M19: 4,498,857 km (0.098 R)
• M20: 4,567,821 km (0.105 R)
• M21: 4,706,947 km (0.049 R)
• M22: 5,084,981 km (0.083 R)
• M23: 5,472,739 km (0.082 R)
• M24: 6,276,977 km (0.073 R)
• M25: 7,279,432 km (0.088 R)
• M26: 7,826,961 km (0.07 R)
• M27: 8,133,786 km (0.074 R)
• M28: 8,387,803 km (0.07 R)
• M29: 8,701,809 km (0.115 R)
• M30: 8,903,616 km (0.052 R)
• M31: 9,253,227 km (0.026 R)
• M32: 9,666,865 km (0.114 R)
• M33: 10,056,418 km (0.064 R)
• M34: 11,287,010 km (0.115 R)
• M35: 11,570,348 km (0.098 R)
• M36: 12,337,636 km (0.083 R)
• M37: 13,022,495 km (0.07 R)
• M38: 13,121,229 km (0.093 R)
• M39: 13,585,880 km (0.08 R)
• M40: 14,157,344 km (0.081 R)
• M41: 15,254,196 km (0.12 R)
• M42: 15,323,609 km (0.118 R)
• M43: 15,393,172 km (0.07 R)
• M44: 15,637,465 km (0.087 R)
• M45: 15,707,477 km (0.092 R)
• M46: 17,130,303 km (0.071 R)
• M47: 17,492,329 km (0.052 R)
• M48: 17,637,888 km (0.104 R)
• M49: 17,893,551 km (0.038 R)
• M50: 18,003,505 km (0.091 R)
• M51: 18,334,715 km (0.091 R)
• M52: 18,816,719 km (0.056 R)
• M53: 19,453,408 km (0.099 R)
• M54: 20,211,420 km (0.028 R)
• M55: 20,364,160 km (0.11 R)
• M56: 21,366,465 km (0.054 R)
• M57: 21,678,078 km (0.057 R)
• M58: 21,873,602 km (0.079 R)
• M59: 22,227,102 km (0.093 R)
• M60: 22,345,284 km (0.117 R)
• M61: 23,059,165 km (0.059 R)
• M62: 23,418,799 km (0.11 R)
• M63: 23,982,184 km (0.087 R)
• M64: 24,917,171 km (0.068 R)
• M65: 25,163,110 km (0.053 R)
• M66: 25,245,239 km (0.085 R)
• M67: 26,738,974 km (0.112 R)
• M68: 27,032,784 km (0.076 R)
• M69: 27,201,082 km (0.082 R)
• M70: 27,581,210 km (0.111 R)
• M71: 28,176,011 km (0.045 R)
• M72: 28,432,123 km (0.104 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.33 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 54.4

Radius: 14.7

Gravity: 0.25 G

Time & Orbit

Eccentricity (e): 0.147

Orbit Range: 4.55 AU - 6.11 AU

Year: 8650 Days

Day: 13.2 Hours

Environment

Temp: -227 °C

Axial Tilt: 27.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (28)

Outer Limit: 39,675,034 km

• M1: 260,450 km (0.054 R)
• M2: 914,492 km (0.109 R)
• M3: 1,248,095 km (0.106 R)
• M4: 1,357,002 km (0.1 R)
• M5: 1,504,057 km (0.052 R)
• M6: 2,199,238 km (0.085 R)
• M7: 3,472,915 km (0.114 R)
• M8: 4,034,355 km (0.095 R)
• M9: 4,436,026 km (0.111 R)
• M10: 5,588,528 km (0.098 R)
• M11: 6,036,723 km (0.084 R)
• M12: 6,457,990 km (0.078 R)
• M13: 6,555,079 km (0.116 R)
• M14: 7,087,798 km (0.116 R)
• M15: 8,258,401 km (0.095 R)
• M16: 8,704,801 km (0.05 R)
• M17: 9,028,531 km (0.037 R)
• M18: 9,821,699 km (0.085 R)
• M19: 9,978,477 km (0.039 R)
• M20: 10,545,603 km (0.079 R)
• M21: 11,006,813 km (0.101 R)
• M22: 11,710,970 km (0.098 R)
• M23: 12,044,723 km (0.118 R)
• M24: 14,979,833 km (0.09 R)
• M25: 15,290,249 km (0.11 R)
• M26: 16,446,640 km (0.112 R)
• M27: 17,794,816 km (0.098 R)
• M28: 18,399,341 km (0.109 R)

Planet 7 - Ice Giant

Semi-Major Axis: 10.37 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 70.5

Radius: 4.9

Gravity: 2.94 G

Time & Orbit

Eccentricity (e): 0.25

Orbit Range: 7.78 AU - 12.96 AU

Year: 23473 Days

Day: 15.6 Hours

Environment

Temp: -230 °C

Axial Tilt: 36.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 39,675,034 km

• M1: 62,233 km (0.036 R)
• M2: 119,678 km (0.11 R)
• M3: 156,629 km (0.105 R)
• M4: 236,664 km (0.09 R)
• M5: 277,205 km (0.054 R)
• M6: 377,884 km (0.071 R)
• M7: 439,070 km (0.108 R)
• M8: 672,442 km (0.111 R)
• M9: 747,989 km (0.062 R)
• M10: 810,372 km (0.092 R)
• M11: 1,646,325 km (0.06 R)
• M12: 2,158,398 km (0.102 R)
• M13: 2,248,157 km (0.119 R)
• M14: 2,788,804 km (0.098 R)
• M15: 3,035,939 km (0.104 R)
• M16: 3,238,644 km (0.086 R)
• M17: 3,737,852 km (0.086 R)
• M18: 4,288,821 km (0.114 R)
• M19: 4,631,550 km (0.11 R)
• M20: 4,923,864 km (0.071 R)
• M21: 5,282,450 km (0.079 R)
• M22: 6,375,861 km (0.098 R)
• M23: 6,832,284 km (0.084 R)
• M24: 7,570,550 km (0.082 R)
• M25: 8,053,452 km (0.058 R)
• M26: 8,796,504 km (0.118 R)
• M27: 8,832,408 km (0.097 R)
• M28: 8,904,364 km (0.051 R)
• M29: 9,672,101 km (0.028 R)
• M30: 11,269,956 km (0.093 R)
• M31: 11,465,480 km (0.097 R)
• M32: 12,179,062 km (0.097 R)
• M33: 12,219,004 km (0.113 R)
• M34: 14,319,508 km (0.048 R)
• M35: 14,829,637 km (0.081 R)
• M36: 15,001,076 km (0.118 R)
• M37: 15,044,011 km (0.083 R)
• M38: 15,911,678 km (0.097 R)
• M39: 16,929,393 km (0.098 R)
• M40: 16,974,122 km (0.061 R)
• M41: 17,831,318 km (0.117 R)
• M42: 19,728,518 km (0.108 R)
• M43: 20,058,830 km (0.108 R)
• M44: 20,629,247 km (0.065 R)
• M45: 20,772,712 km (0.086 R)
• M46: 22,176,239 km (0.094 R)
• M47: 22,667,369 km (0.092 R)
• M48: 22,815,470 km (0.062 R)
• M49: 23,960,941 km (0.064 R)
• M50: 24,464,787 km (0.097 R)
• M51: 25,175,975 km (0.07 R)
• M52: 25,227,138 km (0.096 R)
• M53: 26,152,101 km (0.093 R)
• M54: 26,514,876 km (0.107 R)
• M55: 26,931,506 km (0.099 R)
• M56: 28,300,177 km (0.053 R)
• M57: 28,353,284 km (0.103 R)
• M58: 29,046,671 km (0.032 R)
• M59: 30,395,445 km (0.031 R)
• M60: 30,558,806 km (0.061 R)
• M61: 30,613,259 km (0.082 R)
• M62: 30,776,920 km (0.076 R)
• M63: 32,540,230 km (0.086 R)
• M64: 33,602,524 km (0.107 R)
• M65: 36,915,369 km (0.051 R)
• M66: 38,316,203 km (0.11 R)
• M67: 38,433,787 km (0.112 R)
• M68: 39,023,203 km (0.106 R)
• M69: 39,378,348 km (0.086 R)

Kuiper Belt

Range: 30 - 52 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 156 - 14,682 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit