🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.57 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 1.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 470.8

Radius: 8.2

Gravity: 7 G

Time & Orbit

Eccentricity (e): 0.069

Orbit Range: 1.05 AU - 1.21 AU

Year: 815 Days

Day: 5.8 Hours

Environment

Temp: -188 °C

Axial Tilt: 35 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (61)

Outer Limit: 28,514,498 km

• M1: 119,379 km (0.107 R)
• M2: 217,366 km (0.106 R)
• M3: 324,478 km (0.11 R)
• M4: 517,459 km (0.119 R)
• M5: 585,526 km (0.065 R)
• M6: 777,759 km (0.094 R)
• M7: 835,654 km (0.03 R)
• M8: 917,334 km (0.106 R)
• M9: 1,007,392 km (0.057 R)
• M10: 1,106,575 km (0.097 R)
• M11: 1,190,799 km (0.099 R)
• M12: 1,321,248 km (0.114 R)
• M13: 1,397,992 km (0.041 R)
• M14: 1,522,607 km (0.094 R)
• M15: 1,603,240 km (0.025 R)
• M16: 1,657,844 km (0.119 R)
• M17: 1,713,045 km (0.096 R)
• M18: 1,868,178 km (0.091 R)
• M19: 1,940,284 km (0.113 R)
• M20: 2,261,022 km (0.032 R)
• M21: 2,415,856 km (0.08 R)
• M22: 2,695,454 km (0.079 R)
• M23: 2,769,057 km (0.098 R)
• M24: 2,851,635 km (0.075 R)
• M25: 2,943,488 km (0.057 R)
• M26: 3,002,429 km (0.064 R)
• M27: 3,070,197 km (0.099 R)
• M28: 3,207,528 km (0.034 R)
• M29: 3,346,804 km (0.107 R)
• M30: 3,443,743 km (0.069 R)
• M31: 3,631,339 km (0.077 R)
• M32: 3,767,622 km (0.095 R)
• M33: 4,129,500 km (0.078 R)
• M34: 4,214,621 km (0.081 R)
• M35: 4,281,192 km (0.099 R)
• M36: 4,357,786 km (0.026 R)
• M37: 4,473,425 km (0.025 R)
• M38: 4,541,492 km (0.093 R)
• M39: 4,648,903 km (0.11 R)
• M40: 4,816,752 km (0.085 R)
• M41: 4,976,672 km (0.084 R)
• M42: 5,209,447 km (0.108 R)
• M43: 5,322,094 km (0.093 R)
• M44: 5,528,988 km (0.079 R)
• M45: 5,929,312 km (0.09 R)
• M46: 6,036,274 km (0.074 R)
• M47: 6,143,835 km (0.073 R)
• M48: 6,241,074 km (0.075 R)
• M49: 6,317,219 km (0.091 R)
• M50: 6,404,584 km (0.048 R)
• M51: 6,492,248 km (0.064 R)
• M52: 6,668,923 km (0.119 R)
• M53: 6,813,734 km (0.052 R)
• M54: 6,925,783 km (0.117 R)
• M55: 7,004,621 km (0.109 R)
• M56: 7,083,609 km (0.113 R)
• M57: 7,426,038 km (0.12 R)
• M58: 7,541,378 km (0.106 R)
• M59: 7,634,129 km (0.107 R)
• M60: 7,762,185 km (0.073 R)
• M61: 7,832,346 km (0.102 R)

Planet 2 - Gas Giant

Semi-Major Axis: 3.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 369.2

Radius: 12.9

Gravity: 2.22 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 2.64 AU - 3.62 AU

Year: 3756 Days

Day: 11.7 Hours

Environment

Temp: -207 °C

Axial Tilt: 1.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 28,514,498 km

• M1: 201,209 km (0.069 R)
• M2: 333,902 km (0.085 R)
• M3: 471,383 km (0.106 R)
• M4: 582,534 km (0.08 R)
• M5: 787,932 km (0.107 R)
• M6: 1,148,612 km (0.107 R)
• M7: 1,377,946 km (0.1 R)
• M8: 1,498,372 km (0.096 R)
• M9: 2,016,579 km (0.108 R)
• M10: 3,487,276 km (0.061 R)
• M11: 3,587,207 km (0.116 R)
• M12: 3,824,320 km (0.086 R)
• M13: 3,996,806 km (0.028 R)
• M14: 4,189,638 km (0.119 R)
• M15: 4,694,531 km (0.077 R)
• M16: 4,823,783 km (0.104 R)
• M17: 5,237,870 km (0.12 R)
• M18: 5,449,252 km (0.03 R)
• M19: 5,920,336 km (0.098 R)
• M20: 6,060,359 km (0.112 R)
• M21: 6,221,626 km (0.12 R)
• M22: 6,486,713 km (0.08 R)
• M23: 6,880,904 km (0.081 R)
• M24: 7,283,023 km (0.078 R)
• M25: 7,671,080 km (0.066 R)
• M26: 8,265,881 km (0.11 R)
• M27: 8,648,103 km (0.111 R)
• M28: 8,830,014 km (0.032 R)
• M29: 9,036,160 km (0.098 R)
• M30: 9,174,389 km (0.055 R)
• M31: 9,971,596 km (0.09 R)
• M32: 10,547,697 km (0.07 R)
• M33: 10,888,780 km (0.103 R)
• M34: 10,986,916 km (0.09 R)
• M35: 11,282,971 km (0.086 R)
• M36: 11,682,098 km (0.036 R)
• M37: 11,832,892 km (0.11 R)
• M38: 11,984,285 km (0.066 R)
• M39: 12,673,932 km (0.04 R)
• M40: 12,932,736 km (0.119 R)
• M41: 13,114,797 km (0.03 R)
• M42: 14,413,755 km (0.107 R)
• M43: 14,683,779 km (0.096 R)
• M44: 15,614,727 km (0.098 R)
• M45: 15,725,579 km (0.073 R)
• M46: 17,046,827 km (0.084 R)
• M47: 18,784,855 km (0.11 R)
• M48: 19,317,274 km (0.098 R)
• M49: 19,436,204 km (0.069 R)
• M50: 19,674,962 km (0.079 R)
• M51: 19,914,618 km (0.073 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 342.9

Radius: 10.6

Gravity: 3.05 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 3.06 AU - 4.36 AU

Year: 4847 Days

Day: 12.7 Hours

Environment

Temp: -221 °C

Axial Tilt: 8.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 28,514,498 km

• M1: 158,723 km (0.078 R)
• M2: 325,675 km (0.115 R)
• M3: 536,757 km (0.034 R)
• M4: 690,245 km (0.107 R)
• M5: 826,379 km (0.112 R)
• M6: 1,238,970 km (0.12 R)
• M7: 1,368,222 km (0.108 R)
• M8: 1,434,494 km (0.083 R)
• M9: 1,529,339 km (0.061 R)
• M10: 1,612,366 km (0.043 R)
• M11: 1,783,057 km (0.082 R)
• M12: 2,267,605 km (0.039 R)
• M13: 2,379,055 km (0.051 R)
• M14: 2,492,301 km (0.07 R)
• M15: 2,674,062 km (0.059 R)
• M16: 2,843,108 km (0.108 R)
• M17: 3,245,526 km (0.115 R)
• M18: 3,462,742 km (0.033 R)
• M19: 3,647,346 km (0.086 R)
• M20: 3,740,994 km (0.108 R)
• M21: 3,968,832 km (0.103 R)
• M22: 4,220,904 km (0.115 R)
• M23: 4,478,362 km (0.063 R)
• M24: 4,639,329 km (0.067 R)
• M25: 4,761,251 km (0.112 R)
• M26: 5,302,347 km (0.106 R)
• M27: 5,494,281 km (0.109 R)
• M28: 5,972,994 km (0.096 R)
• M29: 6,970,513 km (0.102 R)
• M30: 7,393,426 km (0.071 R)
• M31: 8,338,286 km (0.111 R)
• M32: 9,014,768 km (0.075 R)
• M33: 9,501,260 km (0.062 R)
• M34: 9,970,100 km (0.062 R)
• M35: 10,048,938 km (0.083 R)
• M36: 10,207,362 km (0.08 R)
• M37: 10,340,055 km (0.107 R)
• M38: 11,066,203 km (0.046 R)
• M39: 11,257,090 km (0.079 R)
• M40: 11,531,752 km (0.119 R)
• M41: 11,697,656 km (0.072 R)
• M42: 12,003,883 km (0.108 R)
• M43: 12,709,536 km (0.119 R)
• M44: 13,254,970 km (0.073 R)
• M45: 13,486,846 km (0.078 R)
• M46: 13,749,391 km (0.105 R)
• M47: 14,101,993 km (0.12 R)
• M48: 14,279,566 km (0.079 R)
• M49: 14,726,414 km (0.101 R)
• M50: 15,329,443 km (0.116 R)
• M51: 16,032,853 km (0.051 R)
• M52: 16,218,204 km (0.119 R)
• M53: 16,373,038 km (0.09 R)
• M54: 16,621,969 km (0.082 R)
• M55: 16,715,617 km (0.062 R)
• M56: 16,809,565 km (0.119 R)
• M57: 16,934,928 km (0.066 R)
• M58: 17,155,136 km (0.036 R)
• M59: 17,407,956 km (0.031 R)
• M60: 18,013,379 km (0.088 R)
• M61: 18,431,505 km (0.1 R)
• M62: 18,983,222 km (0.092 R)
• M63: 19,375,916 km (0.06 R)
• M64: 20,003,330 km (0.053 R)
• M65: 20,102,962 km (0.104 R)
• M66: 20,536,796 km (0.099 R)
• M67: 20,939,962 km (0.115 R)
• M68: 21,515,615 km (0.058 R)
• M69: 21,719,965 km (0.088 R)
• M70: 22,509,543 km (0.074 R)
• M71: 22,821,006 km (0.052 R)
• M72: 23,343,401 km (0.086 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.92 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 817.1

Radius: 8

Gravity: 12.77 G

Time & Orbit

Eccentricity (e): 0.011

Orbit Range: 4.87 AU - 4.97 AU

Year: 7402 Days

Day: 8.2 Hours

Environment

Temp: -216 °C

Axial Tilt: 35.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 28,514,498 km

• M1: 118,781 km (0.029 R)
• M2: 175,777 km (0.032 R)
• M3: 234,869 km (0.119 R)
• M4: 293,960 km (0.078 R)
• M5: 382,971 km (0.081 R)
• M6: 469,438 km (0.107 R)
• M7: 605,871 km (0.09 R)
• M8: 819,198 km (0.109 R)
• M9: 884,572 km (0.069 R)
• M10: 951,742 km (0.047 R)
• M11: 1,020,856 km (0.093 R)
• M12: 1,073,814 km (0.115 R)
• M13: 1,634,058 km (0.073 R)
• M14: 1,781,561 km (0.045 R)
• M15: 2,112,322 km (0.119 R)
• M16: 2,203,726 km (0.111 R)
• M17: 2,680,943 km (0.118 R)
• M18: 3,189,576 km (0.115 R)
• M19: 3,455,112 km (0.116 R)
• M20: 3,645,251 km (0.037 R)
• M21: 3,755,505 km (0.095 R)
• M22: 3,838,981 km (0.069 R)
• M23: 4,092,848 km (0.091 R)
• M24: 4,381,572 km (0.076 R)
• M25: 4,498,857 km (0.097 R)
• M26: 4,887,362 km (0.093 R)
• M27: 5,131,805 km (0.112 R)
• M28: 5,224,406 km (0.084 R)
• M29: 5,411,553 km (0.11 R)
• M30: 5,537,515 km (0.051 R)
• M31: 6,083,846 km (0.107 R)
• M32: 6,580,062 km (0.088 R)
• M33: 6,850,086 km (0.053 R)
• M34: 8,545,030 km (0.091 R)
• M35: 8,802,638 km (0.085 R)
• M36: 8,876,689 km (0.113 R)
• M37: 9,628,867 km (0.099 R)
• M38: 9,781,606 km (0.094 R)
• M39: 10,051,182 km (0.09 R)
• M40: 10,323,001 km (0.077 R)
• M41: 10,715,695 km (0.099 R)
• M42: 12,709,685 km (0.09 R)
• M43: 13,088,168 km (0.075 R)
• M44: 13,470,391 km (0.076 R)
• M45: 13,770,185 km (0.094 R)
• M46: 13,942,522 km (0.115 R)
• M47: 14,376,505 km (0.118 R)
• M48: 14,682,881 km (0.073 R)
• M49: 15,168,775 km (0.063 R)
• M50: 15,391,227 km (0.038 R)
• M51: 16,110,793 km (0.096 R)
• M52: 16,474,765 km (0.048 R)
• M53: 16,795,353 km (0.098 R)
• M54: 17,910,306 km (0.11 R)
• M55: 18,334,565 km (0.09 R)
• M56: 18,619,101 km (0.07 R)
• M57: 20,210,822 km (0.111 R)
• M58: 21,296,005 km (0.111 R)
• M59: 22,400,037 km (0.081 R)
• M60: 22,602,892 km (0.104 R)
• M61: 22,908,072 km (0.09 R)
• M62: 24,038,882 km (0.049 R)
• M63: 24,246,524 km (0.109 R)
• M64: 24,454,614 km (0.083 R)
• M65: 24,820,381 km (0.096 R)
• M66: 25,293,260 km (0.082 R)
• M67: 25,345,918 km (0.116 R)
• M68: 27,484,869 km (0.075 R)
• M69: 28,083,111 km (0.098 R)
• M70: 28,411,179 km (0.037 R)
• M71: 28,905,899 km (0.069 R)
• M72: 29,181,907 km (0.053 R)
• M73: 29,292,460 km (0.058 R)
• M74: 29,569,814 km (0.055 R)
• M75: 29,792,117 km (0.099 R)
• M76: 30,126,767 km (0.03 R)
• M77: 31,194,896 km (0.112 R)
• M78: 32,103,853 km (0.098 R)
• M79: 32,446,881 km (0.116 R)
• M80: 32,618,918 km (0.047 R)
• M81: 32,848,700 km (0.074 R)
• M82: 32,963,891 km (0.101 R)
• M83: 34,180,570 km (0.037 R)
• M84: 34,999,918 km (0.09 R)
• M85: 35,294,177 km (0.096 R)
• M86: 35,766,457 km (0.04 R)
• M87: 36,657,911 km (0.078 R)
• M88: 36,717,601 km (0.114 R)
• M89: 37,256,303 km (0.093 R)
• M90: 37,436,418 km (0.049 R)
• M91: 37,616,833 km (0.105 R)
• M92: 38,038,849 km (0.097 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.89 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 322.5

Radius: 3.5

Gravity: 26.33 G

Time & Orbit

Eccentricity (e): 0.082

Orbit Range: 7.24 AU - 8.54 AU

Year: 15032 Days

Day: 22.3 Hours

Environment

Temp: -239 °C

Axial Tilt: 2.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 28,514,498 km

• M1: 51,611 km (0.111 R)
• M2: 310,416 km (0.106 R)
• M3: 639,980 km (0.062 R)
• M4: 708,795 km (0.049 R)
• M5: 1,430,006 km (0.119 R)
• M6: 1,497,624 km (0.037 R)
• M7: 1,636,152 km (0.072 R)
• M8: 2,204,025 km (0.064 R)
• M9: 2,604,349 km (0.109 R)
• M10: 2,855,225 km (0.041 R)
• M11: 3,055,686 km (0.118 R)
• M12: 3,409,934 km (0.099 R)
• M13: 3,530,809 km (0.1 R)
• M14: 3,653,180 km (0.097 R)
• M15: 4,060,385 km (0.096 R)
• M16: 4,253,217 km (0.115 R)
• M17: 5,053,865 km (0.055 R)
• M18: 5,365,776 km (0.033 R)
• M19: 5,436,087 km (0.084 R)
• M20: 5,471,243 km (0.088 R)
• M21: 5,935,744 km (0.066 R)
• M22: 5,972,097 km (0.086 R)
• M23: 6,338,761 km (0.056 R)
• M24: 7,481,689 km (0.098 R)
• M25: 7,876,627 km (0.083 R)
• M26: 8,036,398 km (0.048 R)
• M27: 8,400,070 km (0.111 R)
• M28: 8,481,601 km (0.11 R)
• M29: 8,976,171 km (0.106 R)
• M30: 9,522,652 km (0.097 R)
• M31: 9,650,259 km (0.09 R)
• M32: 9,821,250 km (0.063 R)
• M33: 10,122,989 km (0.07 R)
• M34: 11,950,327 km (0.077 R)
• M35: 11,996,104 km (0.105 R)
• M36: 13,160,573 km (0.06 R)
• M37: 13,302,841 km (0.07 R)
• M38: 14,751,996 km (0.118 R)
• M39: 15,795,890 km (0.087 R)
• M40: 15,896,569 km (0.029 R)
• M41: 16,098,376 km (0.055 R)
• M42: 17,069,267 km (0.11 R)
• M43: 18,164,173 km (0.079 R)
• M44: 18,216,832 km (0.094 R)
• M45: 18,587,087 km (0.097 R)
• M46: 19,496,791 km (0.086 R)
• M47: 20,038,635 km (0.085 R)
• M48: 20,147,692 km (0.113 R)
• M49: 20,640,467 km (0.114 R)
• M50: 21,248,134 km (0.101 R)
• M51: 21,303,634 km (0.111 R)
• M52: 21,582,036 km (0.119 R)
• M53: 22,142,430 km (0.084 R)
• M54: 22,707,610 km (0.107 R)
• M55: 22,764,458 km (0.118 R)
• M56: 23,736,844 km (0.075 R)
• M57: 27,034,579 km (0.054 R)
• M58: 28,552,399 km (0.095 R)
• M59: 29,973,130 km (0.108 R)
• M60: 30,160,128 km (0.048 R)
• M61: 30,472,637 km (0.112 R)
• M62: 30,660,682 km (0.05 R)
• M63: 31,606,589 km (0.043 R)
• M64: 31,987,615 km (0.108 R)
• M65: 32,178,652 km (0.104 R)
• M66: 34,305,634 km (0.041 R)
• M67: 36,012,995 km (0.11 R)
• M68: 36,677,060 km (0.115 R)
• M69: 37,747,881 km (0.112 R)
• M70: 38,625,572 km (0.092 R)
• M71: 39,236,978 km (0.089 R)
• M72: 39,373,412 km (0.113 R)
• M73: 41,090,646 km (0.096 R)
• M74: 41,714,917 km (0.104 R)
• M75: 42,482,055 km (0.067 R)
• M76: 43,183,520 km (0.039 R)
• M77: 43,606,134 km (0.085 R)
• M78: 43,959,484 km (0.115 R)
• M79: 46,459,115 km (0.074 R)
• M80: 48,931,070 km (0.087 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.92 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 63.1

Radius: 4.2

Gravity: 3.58 G

Time & Orbit

Eccentricity (e): 0.207

Orbit Range: 6.28 AU - 9.56 AU

Year: 15117 Days

Day: 18.8 Hours

Environment

Temp: -222 °C

Axial Tilt: 17 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 28,514,498 km

• M1: 56,847 km (0.107 R)
• M2: 207,642 km (0.086 R)
• M3: 360,980 km (0.108 R)
• M4: 523,892 km (0.12 R)
• M5: 613,650 km (0.112 R)
• M6: 720,613 km (0.044 R)
• M7: 1,034,469 km (0.099 R)
• M8: 1,133,353 km (0.068 R)
• M9: 1,220,569 km (0.088 R)
• M10: 1,310,029 km (0.052 R)
• M11: 1,495,530 km (0.096 R)
• M12: 1,977,235 km (0.101 R)
• M13: 2,082,552 km (0.073 R)
• M14: 2,280,320 km (0.096 R)
• M15: 2,694,108 km (0.09 R)
• M16: 2,929,426 km (0.083 R)
• M17: 3,652,731 km (0.096 R)
• M18: 4,451,285 km (0.08 R)
• M19: 4,543,287 km (0.105 R)
• M20: 4,635,888 km (0.084 R)
• M21: 5,546,191 km (0.115 R)
• M22: 5,645,225 km (0.068 R)
• M23: 6,484,021 km (0.062 R)
• M24: 6,614,470 km (0.101 R)
• M25: 7,524,324 km (0.106 R)
• M26: 7,827,110 km (0.114 R)
• M27: 8,359,379 km (0.118 R)
• M28: 8,444,351 km (0.115 R)
• M29: 8,558,345 km (0.068 R)
• M30: 8,615,491 km (0.047 R)
• M31: 8,672,787 km (0.039 R)
• M32: 8,758,955 km (0.098 R)
• M33: 8,874,295 km (0.102 R)
• M34: 9,164,814 km (0.114 R)
• M35: 9,193,986 km (0.046 R)
• M36: 9,340,592 km (0.096 R)
• M37: 9,874,656 km (0.093 R)
• M38: 10,236,085 km (0.047 R)
• M39: 10,266,453 km (0.112 R)
• M40: 10,663,486 km (0.117 R)
• M41: 10,879,206 km (0.109 R)
• M42: 10,910,173 km (0.099 R)
• M43: 11,158,804 km (0.072 R)
• M44: 12,365,162 km (0.083 R)
• M45: 12,462,251 km (0.116 R)
• M46: 13,115,245 km (0.071 R)
• M47: 13,479,217 km (0.11 R)
• M48: 13,745,950 km (0.067 R)
• M49: 14,217,034 km (0.119 R)
• M50: 14,522,512 km (0.07 R)
• M51: 14,933,308 km (0.08 R)
• M52: 15,278,580 km (0.079 R)
• M53: 15,347,994 km (0.117 R)
• M54: 15,696,407 km (0.088 R)
• M55: 16,936,274 km (0.117 R)
• M56: 17,151,994 km (0.12 R)
• M57: 17,260,154 km (0.091 R)
• M58: 18,612,967 km (0.106 R)
• M59: 19,021,818 km (0.069 R)
• M60: 19,283,465 km (0.1 R)
• M61: 19,320,864 km (0.106 R)
• M62: 20,151,432 km (0.068 R)
• M63: 20,456,312 km (0.1 R)
• M64: 20,532,906 km (0.093 R)
• M65: 21,652,197 km (0.105 R)
• M66: 22,003,752 km (0.092 R)
• M67: 22,396,447 km (0.085 R)
• M68: 22,672,604 km (0.083 R)
• M69: 23,188,717 km (0.112 R)
• M70: 23,628,385 km (0.069 R)
• M71: 23,748,812 km (0.073 R)
• M72: 23,788,904 km (0.083 R)
• M73: 25,209,186 km (0.061 R)
• M74: 26,074,610 km (0.103 R)
• M75: 26,240,514 km (0.099 R)
• M76: 26,406,717 km (0.078 R)
• M77: 27,876,516 km (0.092 R)
• M78: 28,088,646 km (0.098 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 256 - 15,599 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit