🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.08 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.07

Radius: 1.57

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.216

Orbit Range: 0.85 AU - 1.31 AU

Year: 404 Days

Day: 38.6 Hours

Environment

Temp: 23 °C

Axial Tilt: 20.2 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 69,073,658 km

• M1: 203,752 km (0.034 R)

Planet 2 - Terrestrial

Semi-Major Axis: 3.27 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.05

Radius: 1.02

Gravity: 1.01 G

Time & Orbit

Eccentricity (e): 0.199

Orbit Range: 2.62 AU - 3.92 AU

Year: 2128 Days

Day: 47.6 Hours

Environment

Temp: -108 °C

Axial Tilt: 0.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 7.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 464.3

Radius: 13.8

Gravity: 2.44 G

Time & Orbit

Eccentricity (e): 0.11

Orbit Range: 6.69 AU - 8.35 AU

Year: 7422 Days

Day: 9.1 Hours

Environment

Temp: -153 °C

Axial Tilt: 4.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 69,073,658 km

• M1: 177,273 km (0.118 R)
• M2: 368,160 km (0.099 R)
• M3: 701,764 km (0.068 R)
• M4: 978,071 km (0.111 R)
• M5: 1,114,355 km (0.098 R)
• M6: 1,894,059 km (0.032 R)
• M7: 2,307,996 km (0.1 R)
• M8: 2,494,395 km (0.064 R)
• M9: 2,642,796 km (0.113 R)
• M10: 2,728,964 km (0.03 R)
• M11: 2,838,171 km (0.112 R)
• M12: 3,359,220 km (0.059 R)
• M13: 3,763,882 km (0.111 R)
• M14: 4,009,373 km (0.08 R)
• M15: 4,750,929 km (0.109 R)
• M16: 6,272,190 km (0.094 R)
• M17: 7,130,882 km (0.108 R)
• M18: 7,838,330 km (0.097 R)
• M19: 8,121,220 km (0.116 R)
• M20: 8,216,364 km (0.093 R)
• M21: 8,536,055 km (0.092 R)
• M22: 8,892,397 km (0.064 R)
• M23: 8,990,383 km (0.073 R)
• M24: 9,519,511 km (0.092 R)
• M25: 10,263,461 km (0.027 R)
• M26: 10,781,519 km (0.106 R)
• M27: 10,956,099 km (0.115 R)
• M28: 11,592,489 km (0.104 R)
• M29: 11,771,408 km (0.094 R)
• M30: 12,023,480 km (0.116 R)
• M31: 12,642,965 km (0.031 R)
• M32: 13,235,672 km (0.109 R)
• M33: 13,385,269 km (0.113 R)
• M34: 14,065,341 km (0.066 R)
• M35: 14,217,931 km (0.114 R)
• M36: 14,371,269 km (0.103 R)
• M37: 14,834,274 km (0.093 R)
• M38: 14,989,707 km (0.097 R)
• M39: 15,263,022 km (0.116 R)
• M40: 15,577,327 km (0.108 R)
• M41: 15,774,946 km (0.094 R)
• M42: 15,933,669 km (0.112 R)
• M43: 16,092,841 km (0.119 R)
• M44: 16,614,040 km (0.086 R)
• M45: 16,775,456 km (0.049 R)
• M46: 17,262,996 km (0.114 R)
• M47: 17,837,601 km (0.044 R)
• M48: 18,711,552 km (0.096 R)
• M49: 19,174,857 km (0.101 R)
• M50: 19,599,266 km (0.114 R)
• M51: 19,727,322 km (0.119 R)
• M52: 19,984,032 km (0.093 R)
• M53: 20,112,835 km (0.089 R)
• M54: 20,674,127 km (0.069 R)
• M55: 21,240,504 km (0.099 R)
• M56: 21,812,118 km (0.112 R)
• M57: 22,522,558 km (0.073 R)
• M58: 22,880,695 km (0.074 R)
• M59: 23,966,327 km (0.11 R)
• M60: 24,745,433 km (0.077 R)
• M61: 25,300,441 km (0.081 R)
• M62: 25,486,241 km (0.095 R)
• M63: 25,765,989 km (0.036 R)
• M64: 26,234,530 km (0.114 R)
• M65: 28,522,180 km (0.111 R)
• M66: 28,618,821 km (0.086 R)
• M67: 28,715,610 km (0.095 R)
• M68: 29,006,728 km (0.108 R)
• M69: 30,082,486 km (0.094 R)
• M70: 30,823,444 km (0.101 R)
• M71: 31,720,583 km (0.104 R)
• M72: 32,980,795 km (0.059 R)
• M73: 33,642,467 km (0.108 R)
• M74: 34,411,549 km (0.072 R)

Planet 4 - Gas Giant

Semi-Major Axis: 7.61 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 773.6

Radius: 13.1

Gravity: 4.51 G

Time & Orbit

Eccentricity (e): 0.178

Orbit Range: 6.26 AU - 8.96 AU

Year: 7555 Days

Day: 14.1 Hours

Environment

Temp: -154 °C

Axial Tilt: 49.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 69,073,658 km

• M1: 173,384 km (0.048 R)
• M2: 306,825 km (0.111 R)
• M3: 410,197 km (0.054 R)
• M4: 530,624 km (0.082 R)
• M5: 830,717 km (0.072 R)
• M6: 1,221,317 km (0.081 R)
• M7: 1,586,336 km (0.067 R)
• M8: 1,729,651 km (0.118 R)
• M9: 2,051,735 km (0.065 R)
• M10: 2,140,895 km (0.064 R)
• M11: 2,254,290 km (0.106 R)
• M12: 2,346,592 km (0.041 R)
• M13: 2,511,150 km (0.094 R)
• M14: 3,053,891 km (0.094 R)
• M15: 3,182,246 km (0.118 R)
• M16: 3,312,695 km (0.103 R)
• M17: 3,551,753 km (0.109 R)
• M18: 3,824,320 km (0.118 R)
• M19: 3,963,147 km (0.108 R)
• M20: 4,741,953 km (0.098 R)
• M21: 4,891,551 km (0.067 R)
• M22: 5,042,495 km (0.08 R)
• M23: 5,287,537 km (0.079 R)
• M24: 5,662,429 km (0.109 R)
• M25: 5,789,288 km (0.103 R)
• M26: 6,372,271 km (0.111 R)
• M27: 7,007,912 km (0.095 R)
• M28: 7,212,861 km (0.115 R)
• M29: 8,159,965 km (0.106 R)
• M30: 8,339,632 km (0.069 R)
• M31: 9,596,404 km (0.078 R)
• M32: 11,189,322 km (0.109 R)
• M33: 11,309,150 km (0.051 R)
• M34: 11,630,636 km (0.063 R)
• M35: 12,159,614 km (0.114 R)
• M36: 12,241,594 km (0.11 R)
• M37: 12,365,012 km (0.102 R)
• M38: 12,447,590 km (0.108 R)
• M39: 12,654,783 km (0.111 R)
• M40: 13,921,727 km (0.118 R)
• M41: 14,136,849 km (0.11 R)
• M42: 14,309,635 km (0.067 R)
• M43: 15,273,045 km (0.075 R)
• M44: 15,361,607 km (0.056 R)
• M45: 16,257,249 km (0.067 R)
• M46: 16,894,387 km (0.099 R)
• M47: 17,539,602 km (0.087 R)
• M48: 18,475,337 km (0.105 R)
• M49: 18,901,841 km (0.117 R)
• M50: 19,571,590 km (0.109 R)
• M51: 20,103,261 km (0.068 R)
• M52: 20,590,801 km (0.112 R)
• M53: 22,026,641 km (0.067 R)
• M54: 22,176,987 km (0.081 R)
• M55: 22,731,396 km (0.038 R)
• M56: 23,853,680 km (0.114 R)
• M57: 23,956,603 km (0.048 R)
• M58: 24,837,435 km (0.082 R)
• M59: 25,150,992 km (0.114 R)
• M60: 26,099,144 km (0.118 R)
• M61: 26,791,183 km (0.115 R)
• M62: 27,166,375 km (0.086 R)
• M63: 27,651,371 km (0.084 R)
• M64: 27,976,148 km (0.109 R)
• M65: 28,084,756 km (0.07 R)
• M66: 29,343,473 km (0.115 R)
• M67: 30,676,390 km (0.098 R)
• M68: 31,237,681 km (0.104 R)
• M69: 31,406,727 km (0.111 R)
• M70: 31,972,356 km (0.115 R)
• M71: 32,142,748 km (0.074 R)
• M72: 33,689,590 km (0.087 R)
• M73: 35,319,160 km (0.06 R)
• M74: 35,612,820 km (0.113 R)
• M75: 35,907,379 km (0.065 R)
• M76: 37,153,080 km (0.089 R)
• M77: 37,751,322 km (0.113 R)
• M78: 37,991,576 km (0.071 R)
• M79: 39,078,704 km (0.114 R)
• M80: 40,913,073 km (0.066 R)

Planet 5 - Gas Giant

Semi-Major Axis: 10.27 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 525.6

Radius: 14.4

Gravity: 2.53 G

Time & Orbit

Eccentricity (e): 0.199

Orbit Range: 8.23 AU - 12.31 AU

Year: 11845 Days

Day: 5.6 Hours

Environment

Temp: -176 °C

Axial Tilt: 26 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 69,073,658 km

• M1: 180,565 km (0.119 R)
• M2: 420,819 km (0.099 R)
• M3: 709,991 km (0.082 R)
• M4: 953,088 km (0.094 R)
• M5: 1,124,677 km (0.115 R)
• M6: 1,286,542 km (0.116 R)
• M7: 1,634,955 km (0.049 R)
• M8: 1,726,958 km (0.107 R)
• M9: 1,868,328 km (0.11 R)
• M10: 1,964,818 km (0.115 R)
• M11: 2,499,780 km (0.069 R)
• M12: 2,633,970 km (0.117 R)
• M13: 2,770,553 km (0.075 R)
• M14: 3,400,210 km (0.066 R)
• M15: 3,609,797 km (0.103 R)
• M16: 3,885,954 km (0.08 R)
• M17: 4,426,302 km (0.088 R)
• M18: 4,622,873 km (0.101 R)
• M19: 5,161,127 km (0.105 R)
• M20: 5,368,170 km (0.117 R)
• M21: 5,613,361 km (0.115 R)
• M22: 6,042,258 km (0.095 R)
• M23: 6,556,127 km (0.078 R)
• M24: 7,392,229 km (0.107 R)
• M25: 8,101,473 km (0.104 R)
• M26: 8,832,408 km (0.096 R)
• M27: 9,373,653 km (0.08 R)
• M28: 9,627,072 km (0.069 R)
• M29: 9,925,669 km (0.083 R)
• M30: 10,444,624 km (0.087 R)
• M31: 10,575,821 km (0.049 R)
• M32: 10,707,468 km (0.061 R)
• M33: 11,195,007 km (0.067 R)
• M34: 12,608,109 km (0.025 R)
• M35: 13,692,693 km (0.112 R)
• M36: 14,562,156 km (0.075 R)
• M37: 14,856,116 km (0.086 R)
• M38: 17,070,613 km (0.086 R)
• M39: 18,532,932 km (0.115 R)
• M40: 19,709,819 km (0.113 R)
• M41: 20,198,405 km (0.064 R)
• M42: 20,745,784 km (0.064 R)
• M43: 21,187,247 km (0.083 R)
• M44: 21,687,652 km (0.107 R)
• M45: 21,799,402 km (0.075 R)
• M46: 23,498,385 km (0.116 R)
• M47: 23,670,572 km (0.057 R)
• M48: 24,479,896 km (0.086 R)
• M49: 24,596,284 km (0.098 R)
• M50: 30,082,337 km (0.047 R)
• M51: 30,394,398 km (0.113 R)
• M52: 30,519,611 km (0.104 R)
• M53: 30,644,825 km (0.091 R)
• M54: 30,833,019 km (0.11 R)
• M55: 31,021,662 km (0.067 R)
• M56: 32,225,326 km (0.062 R)
• M57: 32,416,811 km (0.098 R)
• M58: 32,544,718 km (0.073 R)
• M59: 32,736,652 km (0.087 R)
• M60: 33,122,016 km (0.117 R)
• M61: 33,444,250 km (0.095 R)
• M62: 33,767,531 km (0.107 R)
• M63: 35,596,963 km (0.117 R)
• M64: 36,258,186 km (0.093 R)
• M65: 37,324,519 km (0.097 R)
• M66: 38,198,470 km (0.073 R)
• M67: 39,351,570 km (0.092 R)
• M68: 39,488,004 km (0.077 R)
• M69: 39,966,717 km (0.081 R)
• M70: 40,172,414 km (0.071 R)
• M71: 41,414,226 km (0.078 R)
• M72: 41,691,879 km (0.058 R)
• M73: 41,831,005 km (0.1 R)
• M74: 42,668,604 km (0.103 R)
• M75: 43,230,194 km (0.103 R)
• M76: 44,006,308 km (0.081 R)
• M77: 45,000,685 km (0.067 R)
• M78: 45,643,956 km (0.068 R)
• M79: 45,787,271 km (0.082 R)
• M80: 46,146,306 km (0.11 R)
• M81: 47,156,540 km (0.112 R)
• M82: 47,446,610 km (0.086 R)
• M83: 47,591,720 km (0.04 R)

Planet 6 - Ice Giant

Semi-Major Axis: 14.98 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 956.6

Radius: 3.9

Gravity: 62.89 G

Time & Orbit

Eccentricity (e): 0.088

Orbit Range: 13.66 AU - 16.3 AU

Year: 20866 Days

Day: 23.7 Hours

Environment

Temp: -194 °C

Axial Tilt: 131.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 69,073,658 km

• M1: 259,702 km (0.116 R)
• M2: 353,500 km (0.067 R)
• M3: 968,048 km (0.118 R)
• M4: 996,920 km (0.116 R)
• M5: 1,269,787 km (0.085 R)
• M6: 2,488,411 km (0.074 R)
• M7: 2,938,850 km (0.047 R)
• M8: 4,385,611 km (0.085 R)
• M9: 5,332,715 km (0.092 R)
• M10: 5,802,602 km (0.109 R)
• M11: 6,015,779 km (0.039 R)
• M12: 6,340,257 km (0.07 R)
• M13: 6,559,717 km (0.111 R)
• M14: 6,614,919 km (0.04 R)
• M15: 7,462,241 km (0.093 R)
• M16: 7,752,162 km (0.11 R)
• M17: 8,523,189 km (0.049 R)
• M18: 8,704,502 km (0.074 R)
• M19: 9,071,166 km (0.104 R)
• M20: 10,782,117 km (0.084 R)
• M21: 10,847,342 km (0.083 R)
• M22: 11,043,913 km (0.108 R)
• M23: 11,175,559 km (0.081 R)
• M24: 11,640,510 km (0.094 R)
• M25: 14,344,192 km (0.047 R)
• M26: 14,704,274 km (0.048 R)
• M27: 14,921,789 km (0.118 R)
• M28: 16,548,816 km (0.076 R)
• M29: 16,775,008 km (0.095 R)
• M30: 16,926,401 km (0.056 R)
• M31: 17,154,238 km (0.062 R)
• M32: 17,383,273 km (0.078 R)
• M33: 17,766,991 km (0.053 R)
• M34: 18,231,193 km (0.058 R)
• M35: 18,464,865 km (0.115 R)
• M36: 20,449,730 km (0.103 R)
• M37: 21,099,134 km (0.075 R)
• M38: 21,590,563 km (0.072 R)
• M39: 23,340,110 km (0.106 R)
• M40: 23,593,679 km (0.102 R)
• M41: 24,018,537 km (0.099 R)
• M42: 24,360,068 km (0.042 R)
• M43: 25,221,154 km (0.097 R)
• M44: 26,355,255 km (0.088 R)
• M45: 27,239,079 km (0.111 R)
• M46: 27,863,351 km (0.098 R)
• M47: 30,315,560 km (0.102 R)
• M48: 32,269,906 km (0.093 R)
• M49: 33,881,524 km (0.06 R)
• M50: 34,264,495 km (0.067 R)
• M51: 34,745,302 km (0.069 R)
• M52: 35,034,774 km (0.083 R)
• M53: 36,985,530 km (0.089 R)
• M54: 39,071,224 km (0.027 R)
• M55: 39,171,604 km (0.063 R)
• M56: 40,787,560 km (0.112 R)
• M57: 41,092,890 km (0.119 R)
• M58: 43,355,707 km (0.113 R)
• M59: 44,188,518 km (0.087 R)
• M60: 46,824,882 km (0.064 R)
• M61: 48,646,535 km (0.066 R)
• M62: 49,728,875 km (0.1 R)
• M63: 49,837,483 km (0.077 R)
• M64: 50,928,650 km (0.099 R)
• M65: 54,360,575 km (0.109 R)
• M66: 56,273,932 km (0.077 R)
• M67: 56,613,968 km (0.067 R)
• M68: 56,727,363 km (0.117 R)
• M69: 58,094,987 km (0.12 R)
• M70: 59,127,810 km (0.109 R)
• M71: 61,327,946 km (0.107 R)
• M72: 61,794,392 km (0.09 R)
• M73: 63,318,944 km (0.094 R)
• M74: 63,436,827 km (0.097 R)
• M75: 65,331,335 km (0.085 R)
• M76: 65,569,345 km (0.098 R)
• M77: 67,845,776 km (0.11 R)
• M78: 68,086,928 km (0.083 R)
• M79: 69,539,673 km (0.112 R)
• M80: 70,758,147 km (0.109 R)
• M81: 72,968,905 km (0.096 R)
• M82: 73,216,040 km (0.087 R)
• M83: 73,463,326 km (0.052 R)
• M84: 73,587,043 km (0.118 R)
• M85: 74,082,810 km (0.086 R)
• M86: 74,206,977 km (0.049 R)
• M87: 74,455,459 km (0.1 R)
• M88: 75,701,758 km (0.093 R)
• M89: 76,202,163 km (0.042 R)
• M90: 77,332,226 km (0.087 R)
• M91: 77,458,187 km (0.119 R)
• M92: 79,354,939 km (0.095 R)
• M93: 80,883,230 km (0.077 R)
• M94: 83,581,228 km (0.108 R)
• M95: 87,486,181 km (0.091 R)

Planet 7 - Ice Giant

Semi-Major Axis: 18.1 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 266.9

Radius: 5.9

Gravity: 7.67 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 15.35 AU - 20.85 AU

Year: 27713 Days

Day: 23.6 Hours

Environment

Temp: -205 °C

Axial Tilt: 37.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 69,073,658 km

• M1: 122,820 km (0.067 R)
• M2: 314,006 km (0.036 R)
• M3: 468,391 km (0.04 R)
• M4: 505,940 km (0.103 R)
• M5: 564,433 km (0.09 R)
• M6: 891,603 km (0.058 R)
• M7: 963,410 km (0.097 R)
• M8: 1,012,329 km (0.116 R)
• M9: 1,406,370 km (0.11 R)
• M10: 1,519,017 km (0.119 R)
• M11: 1,813,575 km (0.1 R)
• M12: 2,061,907 km (0.119 R)
• M13: 2,321,161 km (0.038 R)
• M14: 2,387,582 km (0.103 R)
• M15: 2,556,478 km (0.11 R)
• M16: 3,159,507 km (0.116 R)
• M17: 3,804,573 km (0.067 R)
• M18: 3,962,249 km (0.083 R)
• M19: 4,365,715 km (0.095 R)
• M20: 4,782,345 km (0.085 R)
• M21: 5,038,456 km (0.037 R)
• M22: 5,168,158 km (0.032 R)
• M23: 5,969,254 km (0.117 R)
• M24: 6,152,661 km (0.063 R)
• M25: 6,856,370 km (0.075 R)
• M26: 7,096,624 km (0.099 R)
• M27: 7,783,876 km (0.118 R)
• M28: 8,492,222 km (0.079 R)
• M29: 8,543,684 km (0.028 R)
• M30: 9,861,641 km (0.115 R)
• M31: 11,241,682 km (0.109 R)
• M32: 11,753,157 km (0.106 R)
• M33: 13,035,061 km (0.085 R)
• M34: 13,153,842 km (0.083 R)
• M35: 13,632,256 km (0.1 R)
• M36: 16,364,361 km (0.036 R)
• M37: 17,463,756 km (0.063 R)
• M38: 18,254,231 km (0.093 R)
• M39: 18,653,807 km (0.069 R)
• M40: 18,854,568 km (0.115 R)
• M41: 20,006,322 km (0.08 R)
• M42: 20,280,684 km (0.114 R)
• M43: 22,235,480 km (0.097 R)
• M44: 22,377,298 km (0.118 R)
• M45: 22,662,133 km (0.06 R)
• M46: 22,733,491 km (0.073 R)
• M47: 22,948,014 km (0.106 R)
• M48: 23,812,989 km (0.111 R)
• M49: 24,468,677 km (0.056 R)
• M50: 24,762,038 km (0.086 R)
• M51: 25,130,348 km (0.06 R)
• M52: 25,649,004 km (0.071 R)
• M53: 26,171,100 km (0.067 R)
• M54: 26,923,278 km (0.109 R)
• M55: 27,301,911 km (0.109 R)
• M56: 28,217,898 km (0.111 R)
• M57: 30,158,482 km (0.083 R)
• M58: 30,867,725 km (0.074 R)
• M59: 30,946,863 km (0.111 R)
• M60: 31,423,033 km (0.1 R)
• M61: 33,189,634 km (0.083 R)
• M62: 33,433,030 km (0.116 R)
• M63: 33,677,024 km (0.099 R)
• M64: 35,235,983 km (0.097 R)
• M65: 35,401,588 km (0.114 R)
• M66: 37,829,711 km (0.099 R)
• M67: 38,253,821 km (0.083 R)
• M68: 39,106,679 km (0.11 R)
• M69: 40,831,093 km (0.087 R)
• M70: 40,918,010 km (0.072 R)
• M71: 43,286,742 km (0.073 R)
• M72: 44,353,674 km (0.115 R)
• M73: 44,442,984 km (0.099 R)
• M74: 46,241,599 km (0.104 R)
• M75: 48,707,272 km (0.07 R)
• M76: 50,095,390 km (0.093 R)
• M77: 51,215,280 km (0.104 R)
• M78: 51,684,269 km (0.05 R)
• M79: 53,099,914 km (0.118 R)
• M80: 53,384,599 km (0.071 R)
• M81: 53,860,170 km (0.113 R)
• M82: 55,680,178 km (0.101 R)
• M83: 57,034,039 km (0.106 R)
• M84: 58,496,657 km (0.044 R)
• M85: 60,267,896 km (0.117 R)
• M86: 61,160,097 km (0.11 R)
• M87: 61,359,063 km (0.119 R)
• M88: 66,911,537 km (0.098 R)
• M89: 67,938,227 km (0.111 R)
• M90: 68,453,592 km (0.047 R)
• M91: 69,073,675 km (0.07 R)

Kuiper Belt

Range: 30.5 - 45.5 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 533 - 15,304 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit