🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.22

Radius: 1.6

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.173

Orbit Range: 0.5 AU - 0.7 AU

Year: 174 Days

Day: 14.3 Hours

Environment

Temp: 169 °C

Axial Tilt: 49.3 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 62,481,910 km

• M1: 135,984 km (0.1 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.87 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.41

Radius: 0.7

Gravity: 0.84 G

Time & Orbit

Eccentricity (e): 0.017

Orbit Range: 0.86 AU - 0.88 AU

Year: 304 Days

Day: 47.4 Hours

Environment

Temp: 27 °C

Axial Tilt: 37.1 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 62,481,910 km

• M1: 112,498 km (0.057 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.03 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.5

Radius: 1.44

Gravity: 1.21 G

Time & Orbit

Eccentricity (e): 0.112

Orbit Range: 0.91 AU - 1.15 AU

Year: 392 Days

Day: 34.2 Hours

Environment

Temp: 11 °C

Axial Tilt: 45 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (1)

Outer Limit: 62,481,910 km

• M1: 313,108 km (0.078 R)

Asteroid Belt

Center: 2.79 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 4 - Gas Giant

Semi-Major Axis: 4.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 223.7

Radius: 10.6

Gravity: 1.99 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 4.22 AU - 4.86 AU

Year: 3625 Days

Day: 6.3 Hours

Environment

Temp: -135 °C

Axial Tilt: 20 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (66)

Outer Limit: 62,481,910 km

• M1: 159,471 km (0.111 R)
• M2: 227,090 km (0.094 R)
• M3: 446,849 km (0.12 R)
• M4: 781,200 km (0.113 R)
• M5: 894,296 km (0.045 R)
• M6: 985,401 km (0.112 R)
• M7: 1,060,649 km (0.077 R)
• M8: 1,167,611 km (0.074 R)
• M9: 1,278,314 km (0.075 R)
• M10: 1,510,789 km (0.069 R)
• M11: 1,609,823 km (0.078 R)
• M12: 1,688,511 km (0.109 R)
• M13: 1,814,921 km (0.11 R)
• M14: 1,956,441 km (0.103 R)
• M15: 2,188,168 km (0.105 R)
• M16: 2,364,694 km (0.097 R)
• M17: 3,174,018 km (0.105 R)
• M18: 3,302,523 km (0.063 R)
• M19: 3,418,162 km (0.054 R)
• M20: 3,668,439 km (0.088 R)
• M21: 3,879,073 km (0.073 R)
• M22: 3,970,627 km (0.102 R)
• M23: 4,375,588 km (0.093 R)
• M24: 4,631,400 km (0.088 R)
• M25: 4,761,251 km (0.116 R)
• M26: 4,925,211 km (0.06 R)
• M27: 5,191,495 km (0.112 R)
• M28: 5,258,664 km (0.115 R)
• M29: 5,360,241 km (0.052 R)
• M30: 5,738,126 km (0.112 R)
• M31: 6,053,777 km (0.09 R)
• M32: 6,249,451 km (0.111 R)
• M33: 6,393,065 km (0.113 R)
• M34: 6,592,479 km (0.114 R)
• M35: 6,665,483 km (0.107 R)
• M36: 6,904,540 km (0.07 R)
• M37: 6,978,741 km (0.096 R)
• M38: 8,122,716 km (0.037 R)
• M39: 8,201,105 km (0.091 R)
• M40: 8,319,138 km (0.108 R)
• M41: 9,140,430 km (0.082 R)
• M42: 9,324,286 km (0.113 R)
• M43: 9,468,049 km (0.075 R)
• M44: 9,591,916 km (0.099 R)
• M45: 9,778,614 km (0.115 R)
• M46: 10,134,807 km (0.106 R)
• M47: 10,219,180 km (0.119 R)
• M48: 10,730,655 km (0.107 R)
• M49: 11,184,984 km (0.045 R)
• M50: 11,513,351 km (0.093 R)
• M51: 11,800,579 km (0.119 R)
• M52: 12,359,477 km (0.102 R)
• M53: 12,630,847 km (0.092 R)
• M54: 12,790,169 km (0.09 R)
• M55: 12,881,424 km (0.069 R)
• M56: 13,110,608 km (0.112 R)
• M57: 13,294,912 km (0.063 R)
• M58: 13,503,302 km (0.116 R)
• M59: 14,040,807 km (0.037 R)
• M60: 14,656,702 km (0.072 R)
• M61: 14,824,102 km (0.067 R)
• M62: 15,354,277 km (0.075 R)
• M63: 15,743,830 km (0.092 R)
• M64: 15,890,585 km (0.07 R)
• M65: 16,507,676 km (0.106 R)
• M66: 16,731,624 km (0.089 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 953.5

Radius: 13.1

Gravity: 5.56 G

Time & Orbit

Eccentricity (e): 0.249

Orbit Range: 4.48 AU - 7.46 AU

Year: 5466 Days

Day: 14.6 Hours

Environment

Temp: -161 °C

Axial Tilt: 108.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 62,481,910 km

• M1: 188,344 km (0.051 R)
• M2: 312,211 km (0.069 R)
• M3: 406,158 km (0.105 R)
• M4: 794,514 km (0.117 R)
• M5: 894,446 km (0.115 R)
• M6: 1,108,520 km (0.101 R)
• M7: 1,222,364 km (0.089 R)
• M8: 1,306,139 km (0.087 R)
• M9: 1,533,827 km (0.059 R)
• M10: 1,643,482 km (0.04 R)
• M11: 2,109,180 km (0.081 R)
• M12: 2,315,326 km (0.106 R)
• M13: 2,463,727 km (0.046 R)
• M14: 2,747,963 km (0.088 R)
• M15: 2,951,117 km (0.079 R)
• M16: 3,615,033 km (0.078 R)
• M17: 3,888,348 km (0.102 R)
• M18: 4,142,963 km (0.098 R)
• M19: 4,324,426 km (0.052 R)
• M20: 4,508,581 km (0.072 R)
• M21: 4,857,592 km (0.12 R)
• M22: 5,811,728 km (0.118 R)
• M23: 6,399,797 km (0.117 R)
• M24: 6,823,009 km (0.116 R)
• M25: 7,255,198 km (0.062 R)
• M26: 7,569,503 km (0.079 R)
• M27: 7,888,146 km (0.119 R)
• M28: 8,374,638 km (0.052 R)
• M29: 8,539,046 km (0.084 R)
• M30: 8,638,080 km (0.091 R)
• M31: 8,770,923 km (0.048 R)
• M32: 8,871,004 km (0.069 R)
• M33: 9,139,532 km (0.049 R)
• M34: 9,342,836 km (0.06 R)
• M35: 10,240,872 km (0.084 R)
• M36: 10,522,714 km (0.067 R)
• M37: 10,629,078 km (0.101 R)
• M38: 10,878,757 km (0.1 R)
• M39: 11,202,487 km (0.047 R)
• M40: 11,456,504 km (0.1 R)
• M41: 11,859,670 km (0.084 R)
• M42: 12,868,858 km (0.093 R)
• M43: 13,020,699 km (0.065 R)
• M44: 13,944,466 km (0.086 R)
• M45: 14,453,548 km (0.112 R)
• M46: 14,849,384 km (0.109 R)
• M47: 15,048,798 km (0.108 R)
• M48: 15,651,827 km (0.105 R)
• M49: 16,923,409 km (0.113 R)
• M50: 17,424,562 km (0.105 R)
• M51: 17,845,979 km (0.112 R)
• M52: 18,270,687 km (0.118 R)
• M53: 19,390,577 km (0.06 R)
• M54: 19,827,103 km (0.109 R)
• M55: 20,002,731 km (0.092 R)
• M56: 20,576,888 km (0.066 R)
• M57: 20,665,749 km (0.102 R)
• M58: 21,425,856 km (0.086 R)
• M59: 21,606,121 km (0.089 R)
• M60: 21,877,342 km (0.091 R)
• M61: 22,195,238 km (0.039 R)
• M62: 24,416,018 km (0.072 R)
• M63: 24,934,823 km (0.087 R)
• M64: 25,552,663 km (0.115 R)
• M65: 25,743,849 km (0.1 R)
• M66: 25,935,484 km (0.037 R)
• M67: 26,127,567 km (0.107 R)
• M68: 26,513,231 km (0.098 R)
• M69: 26,852,070 km (0.068 R)
• M70: 27,192,555 km (0.094 R)
• M71: 27,926,781 km (0.081 R)
• M72: 28,816,439 km (0.08 R)
• M73: 30,776,022 km (0.118 R)
• M74: 31,285,403 km (0.063 R)
• M75: 32,003,173 km (0.088 R)
• M76: 32,157,708 km (0.085 R)
• M77: 32,830,150 km (0.11 R)
• M78: 33,298,392 km (0.065 R)
• M79: 33,402,811 km (0.077 R)
• M80: 33,507,230 km (0.094 R)
• M81: 33,873,745 km (0.114 R)
• M82: 34,769,537 km (0.089 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 393.7

Radius: 10.1

Gravity: 3.86 G

Time & Orbit

Eccentricity (e): 0.138

Orbit Range: 5.9 AU - 7.78 AU

Year: 6704 Days

Day: 7.9 Hours

Environment

Temp: -164 °C

Axial Tilt: 8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 62,481,910 km

• M1: 136,284 km (0.051 R)
• M2: 368,759 km (0.11 R)
• M3: 737,518 km (0.119 R)
• M4: 946,356 km (0.108 R)
• M5: 1,174,792 km (0.08 R)
• M6: 1,357,900 km (0.101 R)
• M7: 1,437,037 km (0.095 R)
• M8: 1,633,459 km (0.105 R)
• M9: 2,052,932 km (0.116 R)
• M10: 2,163,185 km (0.071 R)
• M11: 2,466,570 km (0.031 R)
• M12: 2,865,098 km (0.104 R)
• M13: 3,030,254 km (0.065 R)
• M14: 3,262,580 km (0.061 R)
• M15: 3,413,524 km (0.058 R)
• M16: 3,588,853 km (0.104 R)
• M17: 3,812,203 km (0.055 R)
• M18: 4,414,334 km (0.084 R)
• M19: 4,775,314 km (0.101 R)
• M20: 4,996,569 km (0.027 R)
• M21: 5,246,248 km (0.079 R)
• M22: 5,321,944 km (0.115 R)
• M23: 5,758,172 km (0.045 R)
• M24: 6,179,140 km (0.064 R)
• M25: 6,474,446 km (0.067 R)
• M26: 6,555,678 km (0.066 R)
• M27: 6,801,766 km (0.086 R)
• M28: 7,162,596 km (0.11 R)
• M29: 7,359,467 km (0.1 R)
• M30: 7,529,710 km (0.091 R)
• M31: 7,672,576 km (0.08 R)
• M32: 7,758,744 km (0.069 R)
• M33: 7,961,000 km (0.103 R)
• M34: 8,048,216 km (0.04 R)
• M35: 9,241,408 km (0.104 R)
• M36: 10,520,919 km (0.063 R)
• M37: 10,745,017 km (0.06 R)
• M38: 11,197,700 km (0.033 R)
• M39: 11,328,299 km (0.069 R)
• M40: 11,492,108 km (0.116 R)
• M41: 12,021,834 km (0.057 R)
• M42: 12,695,025 km (0.091 R)
• M43: 13,139,181 km (0.119 R)
• M44: 14,325,043 km (0.113 R)
• M45: 14,894,862 km (0.095 R)
• M46: 14,966,669 km (0.088 R)
• M47: 16,093,440 km (0.116 R)
• M48: 16,277,744 km (0.09 R)
• M49: 17,059,543 km (0.059 R)
• M50: 17,134,641 km (0.089 R)
• M51: 17,209,889 km (0.054 R)
• M52: 17,285,136 km (0.059 R)
• M53: 18,235,980 km (0.056 R)
• M54: 18,466,660 km (0.044 R)
• M55: 19,008,653 km (0.056 R)
• M56: 19,320,864 km (0.076 R)
• M57: 20,506,278 km (0.061 R)
• M58: 20,786,325 km (0.118 R)
• M59: 21,228,835 km (0.108 R)
• M60: 21,959,771 km (0.105 R)
• M61: 22,164,271 km (0.057 R)
• M62: 22,246,251 km (0.079 R)
• M63: 22,616,505 km (0.114 R)
• M64: 23,404,587 km (0.096 R)
• M65: 23,529,800 km (0.076 R)
• M66: 24,117,421 km (0.093 R)
• M67: 24,328,354 km (0.074 R)
• M68: 24,582,371 km (0.086 R)
• M69: 26,211,641 km (0.077 R)
• M70: 26,385,175 km (0.074 R)
• M71: 26,515,475 km (0.069 R)
• M72: 28,586,208 km (0.09 R)
• M73: 29,033,506 km (0.116 R)
• M74: 29,438,019 km (0.098 R)
• M75: 29,573,255 km (0.108 R)
• M76: 29,753,820 km (0.074 R)
• M77: 29,980,161 km (0.104 R)
• M78: 30,252,579 km (0.081 R)
• M79: 30,343,535 km (0.088 R)

Planet 7 - Gas Giant

Semi-Major Axis: 8.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 695.8

Radius: 13.6

Gravity: 3.76 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 7.58 AU - 8.6 AU

Year: 8623 Days

Day: 6.6 Hours

Environment

Temp: -177 °C

Axial Tilt: 0.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 62,481,910 km

• M1: 233,522 km (0.067 R)
• M2: 598,092 km (0.1 R)
• M3: 745,297 km (0.076 R)
• M4: 856,747 km (0.09 R)
• M5: 1,544,149 km (0.08 R)
• M6: 2,398,203 km (0.071 R)
• M7: 2,848,343 km (0.059 R)
• M8: 4,116,784 km (0.109 R)
• M9: 4,595,048 km (0.109 R)
• M10: 4,778,904 km (0.052 R)
• M11: 4,902,921 km (0.114 R)
• M12: 6,168,219 km (0.088 R)
• M13: 6,337,415 km (0.101 R)
• M14: 6,508,255 km (0.096 R)
• M15: 6,715,448 km (0.089 R)
• M16: 6,959,742 km (0.112 R)
• M17: 7,207,177 km (0.099 R)
• M18: 7,565,464 km (0.104 R)
• M19: 8,077,238 km (0.065 R)
• M20: 8,225,489 km (0.12 R)
• M21: 8,487,136 km (0.113 R)
• M22: 8,942,213 km (0.112 R)
• M23: 9,095,700 km (0.106 R)
• M24: 9,876,152 km (0.104 R)
• M25: 10,637,456 km (0.105 R)
• M26: 10,759,528 km (0.084 R)
• M27: 11,542,673 km (0.114 R)
• M28: 11,668,036 km (0.12 R)
• M29: 12,558,442 km (0.077 R)
• M30: 12,687,395 km (0.109 R)
• M31: 13,164,014 km (0.092 R)
• M32: 13,295,062 km (0.108 R)
• M33: 13,514,522 km (0.114 R)
• M34: 13,868,022 km (0.115 R)
• M35: 14,539,118 km (0.106 R)
• M36: 15,037,877 km (0.066 R)
• M37: 15,404,242 km (0.078 R)
• M38: 16,709,783 km (0.073 R)
• M39: 17,375,793 km (0.114 R)
• M40: 17,953,540 km (0.085 R)
• M41: 18,098,949 km (0.081 R)
• M42: 18,244,807 km (0.082 R)
• M43: 18,635,706 km (0.083 R)
• M44: 20,580,329 km (0.101 R)
• M45: 20,987,235 km (0.099 R)
• M46: 21,294,060 km (0.11 R)
• M47: 21,499,458 km (0.114 R)
• M48: 21,653,993 km (0.108 R)
• M49: 21,808,826 km (0.071 R)
• M50: 22,536,470 km (0.099 R)
• M51: 23,325,001 km (0.119 R)
• M52: 24,176,063 km (0.108 R)
• M53: 24,283,026 km (0.108 R)
• M54: 25,417,127 km (0.048 R)
• M55: 25,526,034 km (0.071 R)
• M56: 26,292,723 km (0.109 R)
• M57: 26,402,827 km (0.058 R)
• M58: 26,734,187 km (0.063 R)
• M59: 27,568,644 km (0.079 R)
• M60: 27,848,840 km (0.109 R)
• M61: 28,129,785 km (0.098 R)
• M62: 28,468,176 km (0.073 R)
• M63: 28,864,760 km (0.045 R)
• M64: 29,320,285 km (0.037 R)
• M65: 29,548,871 km (0.077 R)
• M66: 29,835,500 km (0.116 R)
• M67: 30,643,029 km (0.067 R)
• M68: 30,991,293 km (0.051 R)
• M69: 31,282,560 km (0.107 R)
• M70: 31,985,222 km (0.114 R)
• M71: 32,279,481 km (0.06 R)
• M72: 32,930,231 km (0.103 R)
• M73: 33,406,102 km (0.109 R)
• M74: 36,064,307 km (0.038 R)
• M75: 36,186,827 km (0.114 R)
• M76: 36,985,979 km (0.106 R)
• M77: 37,109,547 km (0.072 R)
• M78: 37,729,032 km (0.053 R)
• M79: 38,789,830 km (0.108 R)
• M80: 39,166,667 km (0.097 R)
• M81: 39,544,701 km (0.093 R)
• M82: 40,304,359 km (0.027 R)
• M83: 40,749,712 km (0.059 R)
• M84: 41,196,710 km (0.089 R)
• M85: 41,452,822 km (0.093 R)
• M86: 43,586,237 km (0.098 R)

Planet 8 - Ice Giant

Semi-Major Axis: 13.18 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 471.9

Radius: 5.7

Gravity: 14.52 G

Time & Orbit

Eccentricity (e): 0.035

Orbit Range: 12.72 AU - 13.64 AU

Year: 17931 Days

Day: 18.4 Hours

Environment

Temp: -197 °C

Axial Tilt: 23.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 62,481,910 km

• M1: 197,170 km (0.1 R)
• M2: 234,270 km (0.058 R)
• M3: 570,117 km (0.097 R)
• M4: 854,054 km (0.111 R)
• M5: 1,034,320 km (0.115 R)
• M6: 1,129,165 km (0.108 R)
• M7: 1,352,814 km (0.102 R)
• M8: 1,456,634 km (0.082 R)
• M9: 1,563,298 km (0.096 R)
• M10: 1,672,504 km (0.066 R)
• M11: 1,784,104 km (0.092 R)
• M12: 2,895,616 km (0.109 R)
• M13: 3,132,280 km (0.072 R)
• M14: 3,270,359 km (0.069 R)
• M15: 3,769,418 km (0.036 R)
• M16: 3,805,919 km (0.096 R)
• M17: 5,036,960 km (0.117 R)
• M18: 5,569,529 km (0.079 R)
• M19: 5,653,154 km (0.111 R)
• M20: 5,779,115 km (0.092 R)
• M21: 6,162,983 km (0.037 R)
• M22: 6,423,433 km (0.118 R)
• M23: 6,865,495 km (0.109 R)
• M24: 6,955,104 km (0.083 R)
• M25: 7,180,847 km (0.069 R)
• M26: 8,202,152 km (0.117 R)
• M27: 9,218,969 km (0.096 R)
• M28: 10,843,003 km (0.118 R)
• M29: 10,947,423 km (0.118 R)
• M30: 12,063,871 km (0.109 R)
• M31: 12,117,876 km (0.11 R)
• M32: 12,717,913 km (0.106 R)
• M33: 12,828,017 km (0.051 R)
• M34: 12,938,570 km (0.054 R)
• M35: 13,495,523 km (0.098 R)
• M36: 13,720,518 km (0.112 R)
• M37: 14,060,405 km (0.107 R)
• M38: 14,174,249 km (0.119 R)
• M39: 17,546,334 km (0.084 R)
• M40: 18,286,395 km (0.113 R)
• M41: 19,669,427 km (0.115 R)
• M42: 19,733,156 km (0.118 R)
• M43: 20,180,753 km (0.104 R)
• M44: 20,373,584 km (0.095 R)
• M45: 20,955,819 km (0.086 R)
• M46: 21,806,433 km (0.11 R)
• M47: 22,401,832 km (0.047 R)
• M48: 23,002,617 km (0.087 R)
• M49: 23,338,764 km (0.042 R)
• M50: 23,473,551 km (0.075 R)
• M51: 23,608,788 km (0.09 R)
• M52: 24,424,994 km (0.07 R)
• M53: 24,836,687 km (0.046 R)
• M54: 25,181,361 km (0.117 R)
• M55: 25,389,003 km (0.074 R)
• M56: 25,805,932 km (0.088 R)
• M57: 26,505,900 km (0.106 R)
• M58: 26,576,211 km (0.099 R)
• M59: 27,496,238 km (0.101 R)
• M60: 27,638,805 km (0.106 R)
• M61: 27,710,163 km (0.04 R)
• M62: 29,367,408 km (0.055 R)
• M63: 29,513,117 km (0.109 R)
• M64: 29,585,971 km (0.109 R)
• M65: 30,171,347 km (0.102 R)
• M66: 30,391,855 km (0.088 R)
• M67: 31,056,668 km (0.119 R)
• M68: 33,231,073 km (0.098 R)
• M69: 33,610,902 km (0.07 R)
• M70: 33,687,047 km (0.11 R)
• M71: 35,919,945 km (0.119 R)
• M72: 35,997,885 km (0.082 R)
• M73: 36,153,766 km (0.1 R)
• M74: 38,359,288 km (0.114 R)
• M75: 38,438,874 km (0.119 R)
• M76: 39,237,577 km (0.026 R)
• M77: 39,317,761 km (0.114 R)
• M78: 40,446,028 km (0.031 R)
• M79: 42,322,434 km (0.12 R)
• M80: 42,816,556 km (0.087 R)
• M81: 43,229,895 km (0.118 R)
• M82: 44,561,167 km (0.107 R)
• M83: 45,147,889 km (0.078 R)
• M84: 47,947,913 km (0.084 R)
• M85: 49,672,028 km (0.045 R)
• M86: 51,504,153 km (0.082 R)
• M87: 52,031,785 km (0.049 R)
• M88: 54,159,665 km (0.041 R)
• M89: 59,879,091 km (0.079 R)
• M90: 60,433,650 km (0.105 R)
• M91: 60,526,251 km (0.071 R)
• M92: 62,481,944 km (0.087 R)

Kuiper Belt

Range: 30 - 49 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 308 - 11,692 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit