🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.32 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.64 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 754.4

Radius: 11

Gravity: 6.23 G

Time & Orbit

Eccentricity (e): 0.235

Orbit Range: 0.49 AU - 0.79 AU

Year: 353 Days

Day: 8.6 Hours

Environment

Temp: -160 °C

Axial Tilt: 32.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 45,583,372 km

• M1: 142,716 km (0.07 R)
• M2: 243,545 km (0.048 R)
• M3: 336,745 km (0.09 R)
• M4: 463,005 km (0.076 R)
• M5: 556,803 km (0.095 R)
• M6: 633,098 km (0.102 R)
• M7: 709,692 km (0.064 R)
• M8: 1,015,919 km (0.062 R)
• M9: 1,108,071 km (0.054 R)
• M10: 1,180,178 km (0.118 R)
• M11: 1,263,354 km (0.065 R)
• M12: 1,475,484 km (0.036 R)
• M13: 1,555,668 km (0.046 R)
• M14: 1,637,199 km (0.106 R)
• M15: 1,709,904 km (0.111 R)
• M16: 1,778,419 km (0.036 R)
• M17: 1,858,754 km (0.097 R)
• M18: 1,940,135 km (0.092 R)
• M19: 2,073,127 km (0.089 R)
• M20: 2,232,299 km (0.086 R)
• M21: 2,401,495 km (0.117 R)
• M22: 2,514,591 km (0.031 R)
• M23: 2,647,882 km (0.088 R)
• M24: 2,883,798 km (0.067 R)
• M25: 3,198,253 km (0.091 R)
• M26: 3,310,002 km (0.085 R)
• M27: 3,443,145 km (0.099 R)
• M28: 3,537,391 km (0.069 R)
• M29: 3,632,535 km (0.034 R)
• M30: 3,756,253 km (0.062 R)
• M31: 3,825,517 km (0.095 R)
• M32: 3,944,297 km (0.113 R)
• M33: 4,071,456 km (0.09 R)
• M34: 4,178,418 km (0.042 R)
• M35: 4,257,555 km (0.094 R)
• M36: 4,351,652 km (0.087 R)
• M37: 4,527,280 km (0.082 R)
• M38: 4,660,422 km (0.086 R)
• M39: 4,787,581 km (0.11 R)
• M40: 4,870,458 km (0.099 R)
• M41: 5,106,523 km (0.064 R)
• M42: 5,268,538 km (0.083 R)

Planet 2 - Gas Giant

Semi-Major Axis: 3.53 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 491

Radius: 14.4

Gravity: 2.37 G

Time & Orbit

Eccentricity (e): 0.207

Orbit Range: 2.8 AU - 4.26 AU

Year: 4578 Days

Day: 9.8 Hours

Environment

Temp: -218 °C

Axial Tilt: 38.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 45,583,372 km

• M1: 235,168 km (0.058 R)
• M2: 373,995 km (0.088 R)
• M3: 496,515 km (0.08 R)
• M4: 657,782 km (0.086 R)
• M5: 955,332 km (0.108 R)
• M6: 1,127,519 km (0.058 R)
• M7: 1,365,081 km (0.092 R)
• M8: 1,504,506 km (0.105 R)
• M9: 1,768,097 km (0.093 R)
• M10: 1,874,910 km (0.12 R)
• M11: 1,983,967 km (0.093 R)
• M12: 2,079,261 km (0.088 R)
• M13: 2,544,660 km (0.069 R)
• M14: 2,754,396 km (0.101 R)
• M15: 2,933,614 km (0.039 R)
• M16: 3,247,321 km (0.082 R)
• M17: 3,748,623 km (0.096 R)
• M18: 3,847,807 km (0.094 R)
• M19: 4,150,892 km (0.1 R)
• M20: 4,399,075 km (0.076 R)
• M21: 4,525,036 km (0.097 R)
• M22: 4,652,195 km (0.044 R)
• M23: 4,802,241 km (0.06 R)
• M24: 4,953,784 km (0.058 R)
• M25: 5,621,439 km (0.054 R)
• M26: 6,294,031 km (0.075 R)
• M27: 6,555,977 km (0.098 R)
• M28: 6,870,133 km (0.082 R)
• M29: 6,967,820 km (0.063 R)
• M30: 7,338,224 km (0.117 R)
• M31: 7,588,950 km (0.03 R)
• M32: 8,021,438 km (0.119 R)
• M33: 8,124,361 km (0.056 R)
• M34: 8,279,644 km (0.102 R)
• M35: 8,777,954 km (0.085 R)
• M36: 9,071,016 km (0.093 R)
• M37: 9,340,143 km (0.091 R)
• M38: 9,502,906 km (0.104 R)
• M39: 10,052,379 km (0.052 R)
• M40: 10,219,180 km (0.084 R)
• M41: 10,471,253 km (0.094 R)
• M42: 11,326,354 km (0.075 R)
• M43: 11,762,282 km (0.102 R)
• M44: 12,831,159 km (0.065 R)
• M45: 13,591,565 km (0.095 R)
• M46: 13,838,102 km (0.069 R)
• M47: 13,992,936 km (0.113 R)
• M48: 14,523,560 km (0.083 R)
• M49: 14,744,067 km (0.072 R)
• M50: 15,220,087 km (0.094 R)
• M51: 16,285,374 km (0.098 R)
• M52: 16,612,993 km (0.1 R)
• M53: 16,777,700 km (0.06 R)
• M54: 17,341,385 km (0.113 R)
• M55: 17,474,976 km (0.119 R)
• M56: 17,575,356 km (0.105 R)
• M57: 18,012,631 km (0.049 R)
• M58: 18,692,404 km (0.106 R)
• M59: 19,867,196 km (0.119 R)
• M60: 21,351,356 km (0.107 R)
• M61: 21,782,048 km (0.118 R)
• M62: 22,179,380 km (0.094 R)
• M63: 22,506,102 km (0.042 R)
• M64: 23,127,831 km (0.077 R)
• M65: 23,385,438 km (0.057 R)
• M66: 24,612,889 km (0.053 R)
• M67: 24,913,581 km (0.091 R)
• M68: 25,329,163 km (0.06 R)

Planet 3 - Gas Giant

Semi-Major Axis: 5.32 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 77

Radius: 11.2

Gravity: 0.61 G

Time & Orbit

Eccentricity (e): 0.194

Orbit Range: 4.29 AU - 6.35 AU

Year: 8470 Days

Day: 10.3 Hours

Environment

Temp: -225 °C

Axial Tilt: 12.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 45,583,372 km

• M1: 139,874 km (0.101 R)
• M2: 397,332 km (0.099 R)
• M3: 760,705 km (0.095 R)
• M4: 1,048,382 km (0.064 R)
• M5: 1,370,316 km (0.113 R)
• M6: 1,802,654 km (0.115 R)
• M7: 2,132,966 km (0.091 R)
• M8: 2,452,657 km (0.107 R)
• M9: 2,664,338 km (0.095 R)
• M10: 2,772,348 km (0.075 R)
• M11: 2,993,154 km (0.078 R)
• M12: 3,073,339 km (0.1 R)
• M13: 3,502,236 km (0.082 R)
• M14: 3,862,767 km (0.105 R)
• M15: 4,938,675 km (0.115 R)
• M16: 5,401,680 km (0.063 R)
• M17: 5,480,219 km (0.048 R)
• M18: 5,678,286 km (0.028 R)
• M19: 6,101,798 km (0.082 R)
• M20: 6,307,196 km (0.088 R)
• M21: 6,431,512 km (0.095 R)
• M22: 6,830,639 km (0.106 R)
• M23: 7,108,442 km (0.068 R)
• M24: 7,919,262 km (0.085 R)
• M25: 8,031,012 km (0.11 R)
• M26: 8,278,896 km (0.063 R)
• M27: 9,061,143 km (0.087 R)
• M28: 9,178,129 km (0.104 R)
• M29: 9,248,589 km (0.093 R)
• M30: 9,366,472 km (0.072 R)
• M31: 9,556,013 km (0.11 R)
• M32: 9,699,028 km (0.082 R)
• M33: 10,993,349 km (0.101 R)
• M34: 11,698,853 km (0.057 R)
• M35: 11,877,622 km (0.029 R)
• M36: 13,499,562 km (0.106 R)
• M37: 13,660,081 km (0.046 R)
• M38: 14,363,640 km (0.111 R)
• M39: 15,862,161 km (0.075 R)
• M40: 16,372,589 km (0.07 R)
• M41: 16,658,620 km (0.091 R)
• M42: 17,555,609 km (0.113 R)
• M43: 17,760,259 km (0.075 R)
• M44: 18,438,536 km (0.077 R)
• M45: 19,698,898 km (0.067 R)
• M46: 20,216,955 km (0.085 R)
• M47: 20,554,598 km (0.114 R)

Asteroid Belt

Center: 6.14 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 4 - Ice Giant

Semi-Major Axis: 6.95 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 483.4

Radius: 7.1

Gravity: 9.59 G

Time & Orbit

Eccentricity (e): 0.208

Orbit Range: 5.5 AU - 8.4 AU

Year: 12647 Days

Day: 20.7 Hours

Environment

Temp: -226 °C

Axial Tilt: 34.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 45,583,372 km

• M1: 208,539 km (0.116 R)
• M2: 285,283 km (0.1 R)
• M3: 334,351 km (0.103 R)
• M4: 387,010 km (0.08 R)
• M5: 471,981 km (0.076 R)
• M6: 517,160 km (0.053 R)
• M7: 748,438 km (0.102 R)
• M8: 876,045 km (0.117 R)
• M9: 1,152,801 km (0.069 R)
• M10: 1,640,191 km (0.054 R)
• M11: 1,881,044 km (0.078 R)
• M12: 2,396,558 km (0.027 R)
• M13: 2,504,717 km (0.095 R)
• M14: 2,559,470 km (0.083 R)
• M15: 2,782,371 km (0.117 R)
• M16: 3,099,069 km (0.107 R)
• M17: 3,276,642 km (0.076 R)
• M18: 3,397,068 km (0.092 R)
• M19: 3,549,509 km (0.071 R)
• M20: 3,704,193 km (0.093 R)
• M21: 4,712,333 km (0.081 R)
• M22: 5,405,270 km (0.061 R)
• M23: 5,583,591 km (0.111 R)
• M24: 6,056,021 km (0.102 R)
• M25: 6,884,494 km (0.102 R)
• M26: 7,116,520 km (0.092 R)
• M27: 7,272,700 km (0.103 R)
• M28: 7,430,077 km (0.109 R)
• M29: 7,628,295 km (0.025 R)
• M30: 7,748,123 km (0.042 R)
• M31: 8,479,955 km (0.051 R)
• M32: 8,645,560 km (0.084 R)
• M33: 9,022,098 km (0.047 R)
• M34: 11,209,967 km (0.049 R)
• M35: 11,482,983 km (0.088 R)
• M36: 11,528,760 km (0.108 R)
• M37: 12,644,461 km (0.12 R)
• M38: 13,119,434 km (0.073 R)
• M39: 13,600,242 km (0.034 R)
• M40: 13,891,509 km (0.09 R)
• M41: 13,940,278 km (0.098 R)
• M42: 14,086,734 km (0.101 R)
• M43: 14,184,870 km (0.063 R)
• M44: 14,283,006 km (0.114 R)
• M45: 14,332,224 km (0.101 R)
• M46: 14,628,577 km (0.094 R)
• M47: 14,976,991 km (0.116 R)
• M48: 15,378,512 km (0.101 R)
• M49: 15,681,896 km (0.11 R)
• M50: 16,089,550 km (0.098 R)
• M51: 16,243,337 km (0.089 R)
• M52: 16,604,017 km (0.098 R)
• M53: 17,754,874 km (0.08 R)
• M54: 18,339,801 km (0.096 R)
• M55: 19,147,779 km (0.071 R)
• M56: 20,022,329 km (0.036 R)
• M57: 20,187,784 km (0.079 R)
• M58: 20,853,943 km (0.109 R)
• M59: 21,246,039 km (0.112 R)
• M60: 22,379,243 km (0.094 R)
• M61: 22,780,614 km (0.097 R)
• M62: 22,953,250 km (0.092 R)
• M63: 23,474,000 km (0.063 R)
• M64: 24,057,133 km (0.114 R)
• M65: 24,350,494 km (0.114 R)
• M66: 24,704,144 km (0.109 R)
• M67: 24,940,807 km (0.08 R)
• M68: 25,535,908 km (0.083 R)
• M69: 27,226,663 km (0.109 R)
• M70: 27,348,884 km (0.107 R)
• M71: 28,147,288 km (0.112 R)
• M72: 29,578,641 km (0.108 R)
• M73: 30,588,127 km (0.114 R)
• M74: 30,715,136 km (0.091 R)
• M75: 30,906,022 km (0.082 R)
• M76: 31,416,750 km (0.099 R)
• M77: 31,608,983 km (0.071 R)
• M78: 32,123,600 km (0.085 R)
• M79: 32,965,836 km (0.099 R)
• M80: 33,684,055 km (0.07 R)
• M81: 33,815,252 km (0.091 R)
• M82: 37,964,200 km (0.079 R)
• M83: 39,889,823 km (0.103 R)
• M84: 40,237,040 km (0.091 R)
• M85: 40,724,879 km (0.102 R)
• M86: 42,695,382 km (0.078 R)
• M87: 44,337,219 km (0.057 R)
• M88: 45,709,031 km (0.08 R)
• M89: 46,509,679 km (0.094 R)
• M90: 46,875,146 km (0.103 R)
• M91: 48,642,346 km (0.092 R)
• M92: 49,608,748 km (0.067 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.3 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 847.4

Radius: 6.5

Gravity: 20.06 G

Time & Orbit

Eccentricity (e): 0.1

Orbit Range: 6.57 AU - 8.03 AU

Year: 13614 Days

Day: 17 Hours

Environment

Temp: -240 °C

Axial Tilt: 22.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 45,583,372 km

• M1: 153,637 km (0.079 R)
• M2: 494,122 km (0.096 R)
• M3: 585,825 km (0.069 R)
• M4: 1,102,836 km (0.076 R)
• M5: 1,590,375 km (0.109 R)
• M6: 1,728,753 km (0.111 R)
• M7: 1,813,725 km (0.066 R)
• M8: 2,290,343 km (0.096 R)
• M9: 2,937,803 km (0.027 R)
• M10: 3,212,016 km (0.07 R)
• M11: 3,602,466 km (0.032 R)
• M12: 4,045,426 km (0.036 R)
• M13: 4,235,116 km (0.115 R)
• M14: 4,388,902 km (0.12 R)
• M15: 5,022,599 km (0.091 R)
• M16: 5,769,391 km (0.057 R)
• M17: 6,199,186 km (0.087 R)
• M18: 6,417,898 km (0.092 R)
• M19: 7,180,548 km (0.087 R)
• M20: 8,498,057 km (0.102 R)
• M21: 9,035,711 km (0.09 R)
• M22: 9,134,745 km (0.109 R)
• M23: 9,184,262 km (0.119 R)
• M24: 9,837,406 km (0.078 R)
• M25: 9,888,270 km (0.083 R)
• M26: 10,453,450 km (0.042 R)
• M27: 10,505,361 km (0.111 R)
• M28: 12,102,019 km (0.096 R)
• M29: 14,001,014 km (0.083 R)
• M30: 14,576,966 km (0.057 R)
• M31: 14,867,934 km (0.119 R)
• M32: 15,160,697 km (0.061 R)
• M33: 15,278,431 km (0.079 R)
• M34: 15,633,127 km (0.076 R)
• M35: 15,871,287 km (0.078 R)
• M36: 15,990,666 km (0.113 R)
• M37: 16,050,505 km (0.089 R)
• M38: 16,957,218 km (0.099 R)
• M39: 17,140,475 km (0.096 R)
• M40: 17,263,145 km (0.105 R)
• M41: 17,324,481 km (0.058 R)
• M42: 17,385,965 km (0.109 R)
• M43: 17,756,370 km (0.039 R)
• M44: 17,880,386 km (0.053 R)
• M45: 21,402,369 km (0.116 R)
• M46: 21,534,464 km (0.069 R)
• M47: 22,198,678 km (0.047 R)
• M48: 23,275,185 km (0.1 R)
• M49: 23,343,102 km (0.081 R)
• M50: 24,368,745 km (0.075 R)
• M51: 26,110,663 km (0.087 R)
• M52: 27,175,052 km (0.09 R)
• M53: 27,317,918 km (0.119 R)
• M54: 28,036,586 km (0.108 R)
• M55: 32,023,219 km (0.098 R)
• M56: 33,928,049 km (0.101 R)
• M57: 34,236,221 km (0.109 R)
• M58: 36,340,614 km (0.05 R)
• M59: 37,368,651 km (0.106 R)
• M60: 37,607,259 km (0.108 R)
• M61: 37,846,317 km (0.114 R)
• M62: 40,265,015 km (0.108 R)
• M63: 40,346,546 km (0.11 R)
• M64: 41,000,288 km (0.062 R)
• M65: 41,822,478 km (0.053 R)
• M66: 43,149,411 km (0.099 R)
• M67: 43,650,415 km (0.11 R)
• M68: 44,489,958 km (0.077 R)
• M69: 44,658,405 km (0.063 R)
• M70: 44,742,778 km (0.099 R)
• M71: 44,911,674 km (0.109 R)
• M72: 45,844,118 km (0.099 R)
• M73: 47,555,966 km (0.099 R)
• M74: 48,592,979 km (0.088 R)
• M75: 49,550,106 km (0.1 R)
• M76: 49,987,231 km (0.086 R)
• M77: 50,953,484 km (0.111 R)
• M78: 51,837,158 km (0.112 R)
• M79: 52,014,581 km (0.066 R)
• M80: 53,351,089 km (0.059 R)
• M81: 53,440,548 km (0.107 R)
• M82: 54,158,468 km (0.051 R)
• M83: 56,422,183 km (0.076 R)
• M84: 58,163,203 km (0.1 R)
• M85: 58,624,264 km (0.068 R)
• M86: 59,179,122 km (0.102 R)
• M87: 59,642,876 km (0.118 R)
• M88: 60,201,026 km (0.116 R)
• M89: 61,416,209 km (0.07 R)
• M90: 61,510,007 km (0.114 R)
• M91: 61,791,700 km (0.045 R)
• M92: 62,073,841 km (0.113 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 241.5

Radius: 5.4

Gravity: 8.28 G

Time & Orbit

Eccentricity (e): 0.238

Orbit Range: 6.1 AU - 9.9 AU

Year: 15619 Days

Day: 15.4 Hours

Environment

Temp: -232 °C

Axial Tilt: 38.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 45,583,372 km

• M1: 93,798 km (0.11 R)
• M2: 186,399 km (0.111 R)
• M3: 473,028 km (0.042 R)
• M4: 516,262 km (0.103 R)
• M5: 560,842 km (0.025 R)
• M6: 638,334 km (0.103 R)
• M7: 686,505 km (0.026 R)
• M8: 1,959,283 km (0.076 R)
• M9: 2,299,768 km (0.107 R)
• M10: 2,632,474 km (0.068 R)
• M11: 2,791,197 km (0.111 R)
• M12: 2,844,753 km (0.109 R)
• M13: 3,090,094 km (0.088 R)
• M14: 3,173,420 km (0.102 R)
• M15: 3,229,369 km (0.077 R)
• M16: 3,485,331 km (0.12 R)
• M17: 3,718,405 km (0.092 R)
• M18: 3,896,426 km (0.083 R)
• M19: 4,199,511 km (0.092 R)
• M20: 4,322,780 km (0.047 R)
• M21: 4,510,077 km (0.059 R)
• M22: 4,763,944 km (0.053 R)
• M23: 7,028,856 km (0.092 R)
• M24: 7,102,009 km (0.045 R)
• M25: 7,360,066 km (0.078 R)
• M26: 8,267,826 km (0.082 R)
• M27: 8,383,764 km (0.07 R)
• M28: 8,774,214 km (0.037 R)
• M29: 9,290,626 km (0.03 R)
• M30: 9,980,721 km (0.074 R)
• M31: 10,394,359 km (0.119 R)
• M32: 10,687,122 km (0.058 R)
• M33: 11,067,699 km (0.094 R)
• M34: 11,625,101 km (0.115 R)
• M35: 13,125,867 km (0.077 R)
• M36: 13,669,954 km (0.115 R)
• M37: 14,082,844 km (0.066 R)
• M38: 14,686,472 km (0.052 R)
• M39: 14,826,944 km (0.114 R)
• M40: 15,109,235 km (0.049 R)
• M41: 15,345,899 km (0.102 R)
• M42: 15,631,482 km (0.065 R)
• M43: 15,918,859 km (0.061 R)
• M44: 16,547,320 km (0.114 R)
• M45: 17,134,641 km (0.069 R)
• M46: 17,184,008 km (0.099 R)
• M47: 17,430,994 km (0.102 R)
• M48: 17,978,523 km (0.108 R)
• M49: 18,128,719 km (0.098 R)
• M50: 18,229,249 km (0.068 R)
• M51: 18,582,150 km (0.09 R)
• M52: 18,683,428 km (0.117 R)
• M53: 19,397,458 km (0.055 R)
• M54: 19,603,155 km (0.036 R)
• M55: 20,172,375 km (0.088 R)
• M56: 20,694,472 km (0.109 R)
• M57: 21,380,079 km (0.081 R)
• M58: 21,858,942 km (0.044 R)
• M59: 22,395,250 km (0.106 R)
• M60: 23,974,854 km (0.117 R)
• M61: 24,029,906 km (0.118 R)
• M62: 24,195,511 km (0.118 R)
• M63: 24,638,919 km (0.045 R)
• M64: 25,308,968 km (0.089 R)
• M65: 26,098,396 km (0.05 R)
• M66: 26,268,638 km (0.115 R)
• M67: 26,496,176 km (0.051 R)
• M68: 26,667,167 km (0.044 R)
• M69: 28,048,853 km (0.112 R)
• M70: 28,106,897 km (0.118 R)
• M71: 30,045,685 km (0.077 R)
• M72: 31,001,167 km (0.095 R)
• M73: 31,422,285 km (0.12 R)
• M74: 31,542,861 km (0.068 R)
• M75: 33,617,783 km (0.119 R)
• M76: 33,679,567 km (0.069 R)
• M77: 34,796,465 km (0.105 R)
• M78: 34,858,847 km (0.113 R)
• M79: 34,983,761 km (0.113 R)
• M80: 35,171,507 km (0.049 R)
• M81: 35,547,745 km (0.07 R)
• M82: 38,026,283 km (0.047 R)
• M83: 38,090,610 km (0.118 R)
• M84: 38,800,153 km (0.119 R)
• M85: 39,774,633 km (0.096 R)
• M86: 41,747,679 km (0.113 R)
• M87: 42,279,201 km (0.066 R)
• M88: 42,345,921 km (0.085 R)
• M89: 42,812,966 km (0.048 R)
• M90: 44,495,343 km (0.103 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: 451 - 15,793 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit