🌌 Stone's Star System Generator

Asteroid Belt

Center: 1.13 AU

Composition

Type: Far Outer (Icy/Cometary)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 2.26 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 669.5

Radius: 9.6

Gravity: 7.26 G

Time & Orbit

Eccentricity (e): 0.098

Orbit Range: 2.04 AU - 2.48 AU

Year: 2388 Days

Day: 11.6 Hours

Environment

Temp: -206 °C

Axial Tilt: 39 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 70,712,441 km

• M1: 125,812 km (0.078 R)
• M2: 191,336 km (0.115 R)
• M3: 281,543 km (0.11 R)
• M4: 420,819 km (0.075 R)
• M5: 594,203 km (0.085 R)
• M6: 720,763 km (0.091 R)
• M7: 819,647 km (0.105 R)
• M8: 942,766 km (0.109 R)
• M9: 1,051,972 km (0.109 R)
• M10: 1,134,251 km (0.111 R)
• M11: 1,305,541 km (0.101 R)
• M12: 1,416,991 km (0.11 R)
• M13: 1,531,882 km (0.115 R)
• M14: 1,649,765 km (0.078 R)
• M15: 1,746,406 km (0.076 R)
• M16: 1,958,236 km (0.075 R)
• M17: 2,047,995 km (0.063 R)
• M18: 2,178,444 km (0.101 R)
• M19: 2,461,783 km (0.109 R)
• M20: 2,544,959 km (0.049 R)
• M21: 2,785,812 km (0.06 R)
• M22: 2,887,089 km (0.109 R)
• M23: 3,034,144 km (0.101 R)
• M24: 3,350,843 km (0.116 R)
• M25: 3,536,643 km (0.081 R)
• M26: 3,599,325 km (0.068 R)
• M27: 3,662,305 km (0.106 R)
• M28: 3,983,343 km (0.069 R)
• M29: 4,048,717 km (0.119 R)
• M30: 4,213,574 km (0.07 R)
• M31: 4,498,857 km (0.082 R)
• M32: 4,652,494 km (0.083 R)
• M33: 4,860,136 km (0.087 R)
• M34: 4,982,656 km (0.112 R)
• M35: 5,053,117 km (0.117 R)
• M36: 5,356,501 km (0.088 R)
• M37: 5,684,121 km (0.085 R)
• M38: 5,757,872 km (0.083 R)
• M39: 5,980,923 km (0.092 R)
• M40: 6,131,119 km (0.061 R)
• M41: 6,206,816 km (0.081 R)
• M42: 6,301,661 km (0.105 R)
• M43: 6,416,402 km (0.098 R)
• M44: 7,059,075 km (0.109 R)
• M45: 7,138,362 km (0.113 R)
• M46: 7,217,948 km (0.108 R)
• M47: 7,337,925 km (0.069 R)
• M48: 7,498,892 km (0.085 R)
• M49: 8,175,524 km (0.075 R)
• M50: 8,552,809 km (0.115 R)
• M51: 9,064,584 km (0.096 R)
• M52: 9,652,354 km (0.03 R)
• M53: 10,051,182 km (0.048 R)
• M54: 10,162,782 km (0.116 R)
• M55: 10,319,860 km (0.081 R)
• M56: 11,512,155 km (0.108 R)
• M57: 11,582,166 km (0.098 R)
• M58: 12,699,064 km (0.088 R)
• M59: 13,087,121 km (0.112 R)
• M60: 13,356,247 km (0.1 R)
• M61: 13,479,067 km (0.113 R)
• M62: 13,800,404 km (0.076 R)
• M63: 14,375,009 km (0.084 R)
• M64: 14,754,090 km (0.069 R)
• M65: 14,855,667 km (0.111 R)
• M66: 14,957,543 km (0.096 R)
• M67: 15,059,718 km (0.091 R)
• M68: 15,780,930 km (0.086 R)
• M69: 15,936,811 km (0.072 R)
• M70: 16,145,649 km (0.076 R)
• M71: 16,250,368 km (0.113 R)
• M72: 16,724,593 km (0.055 R)
• M73: 16,857,137 km (0.078 R)
• M74: 17,016,608 km (0.107 R)
• M75: 17,337,047 km (0.117 R)

Planet 2 - Ice Giant

Semi-Major Axis: 5.77 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 946

Radius: 4.8

Gravity: 41.06 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 4.82 AU - 6.72 AU

Year: 9743 Days

Day: 17.6 Hours

Environment

Temp: -226 °C

Axial Tilt: 4.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 70,712,441 km

• M1: 318,494 km (0.11 R)
• M2: 432,637 km (0.103 R)
• M3: 543,339 km (0.104 R)
• M4: 1,072,018 km (0.097 R)
• M5: 1,179,280 km (0.111 R)
• M6: 1,290,132 km (0.071 R)
• M7: 1,545,795 km (0.117 R)
• M8: 1,741,618 km (0.118 R)
• M9: 1,791,734 km (0.104 R)
• M10: 2,050,089 km (0.112 R)
• M11: 2,403,290 km (0.099 R)
• M12: 2,716,697 km (0.073 R)
• M13: 3,381,809 km (0.071 R)
• M14: 3,764,930 km (0.117 R)
• M15: 5,138,238 km (0.073 R)
• M16: 5,210,643 km (0.098 R)
• M17: 5,466,605 km (0.104 R)
• M18: 5,503,556 km (0.091 R)
• M19: 5,652,107 km (0.037 R)
• M20: 6,452,904 km (0.086 R)
• M21: 7,533,898 km (0.107 R)
• M22: 7,657,466 km (0.11 R)
• M23: 7,906,547 km (0.112 R)
• M24: 9,059,946 km (0.116 R)
• M25: 9,902,781 km (0.112 R)
• M26: 10,038,167 km (0.114 R)
• M27: 10,174,151 km (0.075 R)
• M28: 10,356,361 km (0.093 R)
• M29: 10,816,674 km (0.115 R)
• M30: 11,002,624 km (0.12 R)
• M31: 11,189,771 km (0.103 R)
• M32: 11,948,382 km (0.071 R)
• M33: 12,920,020 km (0.101 R)
• M34: 14,373,064 km (0.12 R)
• M35: 14,628,877 km (0.095 R)
• M36: 15,561,918 km (0.104 R)
• M37: 16,460,703 km (0.116 R)
• M38: 16,943,455 km (0.105 R)
• M39: 17,485,149 km (0.107 R)
• M40: 17,594,056 km (0.027 R)
• M41: 18,418,939 km (0.102 R)
• M42: 18,975,892 km (0.065 R)
• M43: 19,200,139 km (0.116 R)
• M44: 21,025,981 km (0.049 R)
• M45: 22,018,263 km (0.114 R)
• M46: 22,194,938 km (0.092 R)
• M47: 22,372,062 km (0.079 R)
• M48: 23,025,655 km (0.07 R)
• M49: 23,085,345 km (0.117 R)
• M50: 23,264,862 km (0.109 R)
• M51: 24,169,331 km (0.065 R)
• M52: 24,412,428 km (0.082 R)
• M53: 25,023,685 km (0.114 R)
• M54: 25,208,139 km (0.053 R)
• M55: 25,888,061 km (0.059 R)
• M56: 26,511,435 km (0.073 R)
• M57: 28,155,217 km (0.092 R)
• M58: 28,603,262 km (0.093 R)
• M59: 28,796,094 km (0.094 R)
• M60: 29,053,851 km (0.114 R)
• M61: 30,484,904 km (0.036 R)
• M62: 31,739,283 km (0.113 R)
• M63: 31,872,275 km (0.063 R)
• M64: 32,741,439 km (0.061 R)
• M65: 33,212,672 km (0.097 R)
• M66: 33,618,232 km (0.118 R)
• M67: 34,502,804 km (0.081 R)
• M68: 34,776,568 km (0.079 R)
• M69: 34,982,415 km (0.103 R)
• M70: 35,119,746 km (0.108 R)
• M71: 35,602,049 km (0.094 R)
• M72: 37,062,124 km (0.07 R)
• M73: 37,202,148 km (0.12 R)
• M74: 37,834,648 km (0.058 R)
• M75: 38,541,647 km (0.104 R)
• M76: 38,612,557 km (0.046 R)
• M77: 38,754,525 km (0.1 R)
• M78: 41,195,065 km (0.11 R)
• M79: 41,267,470 km (0.116 R)
• M80: 41,776,402 km (0.106 R)
• M81: 42,287,429 km (0.118 R)
• M82: 42,800,400 km (0.095 R)
• M83: 43,906,676 km (0.111 R)
• M84: 44,129,128 km (0.069 R)
• M85: 44,351,879 km (0.076 R)
• M86: 45,396,371 km (0.107 R)
• M87: 46,373,395 km (0.054 R)
• M88: 47,357,450 km (0.066 R)
• M89: 47,585,587 km (0.118 R)
• M90: 47,737,728 km (0.102 R)
• M91: 48,042,758 km (0.074 R)
• M92: 49,731,718 km (0.076 R)
• M93: 50,118,279 km (0.12 R)
• M94: 51,987,504 km (0.031 R)
• M95: 52,301,211 km (0.116 R)

Planet 3 - Ice Giant

Semi-Major Axis: 6.34 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 623.1

Radius: 7.1

Gravity: 12.36 G

Time & Orbit

Eccentricity (e): 0.008

Orbit Range: 6.29 AU - 6.39 AU

Year: 11221 Days

Day: 15.9 Hours

Environment

Temp: -232 °C

Axial Tilt: 12.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 70,712,441 km

• M1: 89,908 km (0.114 R)
• M2: 138,378 km (0.068 R)
• M3: 199,264 km (0.03 R)
• M4: 310,416 km (0.08 R)
• M5: 361,578 km (0.117 R)
• M6: 488,736 km (0.1 R)
• M7: 550,371 km (0.092 R)
• M8: 1,328,878 km (0.085 R)
• M9: 1,508,096 km (0.119 R)
• M10: 1,624,184 km (0.057 R)
• M11: 1,840,503 km (0.099 R)
• M12: 1,989,951 km (0.055 R)
• M13: 2,571,587 km (0.085 R)
• M14: 2,654,764 km (0.084 R)
• M15: 3,443,743 km (0.12 R)
• M16: 4,071,904 km (0.081 R)
• M17: 4,333,102 km (0.12 R)
• M18: 4,465,646 km (0.115 R)
• M19: 5,254,326 km (0.119 R)
• M20: 5,574,465 km (0.069 R)
• M21: 6,122,293 km (0.114 R)
• M22: 6,459,187 km (0.104 R)
• M23: 6,725,471 km (0.074 R)
• M24: 6,879,108 km (0.116 R)
• M25: 7,308,006 km (0.114 R)
• M26: 7,906,696 km (0.077 R)
• M27: 8,109,701 km (0.082 R)
• M28: 8,521,095 km (0.079 R)
• M29: 8,854,997 km (0.101 R)
• M30: 10,632,669 km (0.11 R)
• M31: 10,767,008 km (0.09 R)
• M32: 10,856,916 km (0.111 R)
• M33: 10,946,974 km (0.057 R)
• M34: 11,676,862 km (0.095 R)
• M35: 11,769,164 km (0.068 R)
• M36: 12,753,368 km (0.083 R)
• M37: 13,763,752 km (0.109 R)
• M38: 13,910,208 km (0.039 R)
• M39: 14,008,045 km (0.026 R)
• M40: 14,451,603 km (0.079 R)
• M41: 15,049,995 km (0.1 R)
• M42: 15,301,768 km (0.054 R)
• M43: 15,962,691 km (0.069 R)
• M44: 16,737,010 km (0.103 R)
• M45: 19,899,060 km (0.093 R)
• M46: 20,175,367 km (0.073 R)
• M47: 20,564,322 km (0.095 R)
• M48: 20,787,671 km (0.115 R)
• M49: 22,087,677 km (0.097 R)
• M50: 22,834,021 km (0.062 R)
• M51: 23,647,085 km (0.099 R)
• M52: 23,822,414 km (0.119 R)
• M53: 24,057,133 km (0.072 R)
• M54: 24,233,509 km (0.084 R)
• M55: 24,351,392 km (0.097 R)
• M56: 24,765,479 km (0.088 R)
• M57: 27,482,475 km (0.057 R)
• M58: 28,037,035 km (0.079 R)
• M59: 28,160,902 km (0.074 R)
• M60: 28,720,098 km (0.03 R)
• M61: 30,038,953 km (0.079 R)
• M62: 30,801,454 km (0.08 R)
• M63: 30,929,210 km (0.044 R)
• M64: 31,249,200 km (0.083 R)
• M65: 31,313,378 km (0.093 R)
• M66: 31,377,555 km (0.08 R)
• M67: 31,827,994 km (0.088 R)
• M68: 32,151,126 km (0.106 R)
• M69: 32,735,455 km (0.11 R)
• M70: 33,061,578 km (0.106 R)
• M71: 34,046,531 km (0.116 R)
• M72: 36,112,328 km (0.095 R)
• M73: 36,314,434 km (0.086 R)
• M74: 37,058,534 km (0.115 R)
• M75: 37,330,353 km (0.066 R)
• M76: 38,287,032 km (0.101 R)
• M77: 39,182,525 km (0.103 R)
• M78: 40,154,612 km (0.106 R)
• M79: 40,433,911 km (0.073 R)
• M80: 41,204,938 km (0.112 R)
• M81: 42,264,390 km (0.105 R)
• M82: 42,335,300 km (0.042 R)
• M83: 42,477,268 km (0.107 R)
• M84: 43,618,999 km (0.085 R)
• M85: 43,906,077 km (0.096 R)
• M86: 44,193,754 km (0.079 R)
• M87: 44,770,903 km (0.066 R)
• M88: 45,495,854 km (0.074 R)
• M89: 46,517,308 km (0.039 R)
• M90: 46,957,425 km (0.097 R)
• M91: 47,030,878 km (0.108 R)
• M92: 48,063,701 km (0.101 R)
• M93: 49,178,505 km (0.047 R)
• M94: 49,253,154 km (0.085 R)
• M95: 49,626,700 km (0.06 R)
• M96: 49,926,345 km (0.048 R)

Planet 4 - Ice Giant

Semi-Major Axis: 7.45 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 261.1

Radius: 7.3

Gravity: 4.9 G

Time & Orbit

Eccentricity (e): 0.073

Orbit Range: 6.91 AU - 7.99 AU

Year: 14294 Days

Day: 20.2 Hours

Environment

Temp: -225 °C

Axial Tilt: 23.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (87)

Outer Limit: 70,712,441 km

• M1: 122,221 km (0.085 R)
• M2: 254,466 km (0.042 R)
• M3: 429,795 km (0.115 R)
• M4: 1,012,778 km (0.082 R)
• M5: 1,105,379 km (0.073 R)
• M6: 1,200,673 km (0.075 R)
• M7: 1,482,515 km (0.111 R)
• M8: 1,545,496 km (0.077 R)
• M9: 2,129,825 km (0.078 R)
• M10: 2,470,609 km (0.105 R)
• M11: 2,802,417 km (0.11 R)
• M12: 2,854,627 km (0.073 R)
• M13: 3,479,646 km (0.083 R)
• M14: 3,851,248 km (0.079 R)
• M15: 4,265,634 km (0.098 R)
• M16: 4,601,032 km (0.054 R)
• M17: 4,662,966 km (0.112 R)
• M18: 4,976,822 km (0.086 R)
• M19: 5,265,097 km (0.106 R)
• M20: 6,162,385 km (0.033 R)
• M21: 6,402,789 km (0.115 R)
• M22: 6,646,185 km (0.106 R)
• M23: 6,857,267 km (0.116 R)
• M24: 7,358,420 km (0.031 R)
• M25: 7,649,986 km (0.084 R)
• M26: 8,395,582 km (0.08 R)
• M27: 8,970,038 km (0.11 R)
• M28: 9,047,530 km (0.038 R)
• M29: 9,399,384 km (0.086 R)
• M30: 9,755,576 km (0.102 R)
• M31: 10,196,890 km (0.054 R)
• M32: 10,399,745 km (0.108 R)
• M33: 10,481,276 km (0.099 R)
• M34: 11,856,379 km (0.059 R)
• M35: 12,673,483 km (0.114 R)
• M36: 13,110,907 km (0.12 R)
• M37: 13,776,169 km (0.094 R)
• M38: 14,771,892 km (0.053 R)
• M39: 15,232,055 km (0.087 R)
• M40: 15,371,032 km (0.115 R)
• M41: 15,978,100 km (0.081 R)
• M42: 16,783,834 km (0.114 R)
• M43: 17,119,532 km (0.119 R)
• M44: 17,505,793 km (0.059 R)
• M45: 17,554,263 km (0.03 R)
• M46: 18,041,503 km (0.051 R)
• M47: 18,780,816 km (0.109 R)
• M48: 19,984,331 km (0.057 R)
• M49: 20,340,074 km (0.116 R)
• M50: 20,697,763 km (0.111 R)
• M51: 21,887,964 km (0.113 R)
• M52: 22,464,963 km (0.109 R)
• M53: 23,741,332 km (0.068 R)
• M54: 24,442,497 km (0.032 R)
• M55: 24,496,651 km (0.041 R)
• M56: 26,030,927 km (0.12 R)
• M57: 26,252,631 km (0.061 R)
• M58: 26,419,283 km (0.094 R)
• M59: 27,089,631 km (0.109 R)
• M60: 27,314,327 km (0.068 R)
• M61: 28,389,936 km (0.038 R)
• M62: 28,904,253 km (0.101 R)
• M63: 29,306,522 km (0.085 R)
• M64: 29,364,117 km (0.082 R)
• M65: 29,594,947 km (0.072 R)
• M66: 29,652,692 km (0.117 R)
• M67: 29,826,225 km (0.064 R)
• M68: 30,116,445 km (0.075 R)
• M69: 31,109,775 km (0.097 R)
• M70: 31,344,943 km (0.093 R)
• M71: 31,403,884 km (0.116 R)
• M72: 31,521,917 km (0.118 R)
• M73: 33,248,426 km (0.117 R)
• M74: 34,335,554 km (0.094 R)
• M75: 35,250,345 km (0.093 R)
• M76: 35,557,020 km (0.063 R)
• M77: 37,540,987 km (0.106 R)
• M78: 39,306,093 km (0.096 R)
• M79: 40,070,837 km (0.107 R)
• M80: 40,134,715 km (0.107 R)
• M81: 40,262,771 km (0.084 R)
• M82: 40,519,182 km (0.118 R)
• M83: 40,647,686 km (0.105 R)
• M84: 40,840,518 km (0.05 R)
• M85: 43,244,107 km (0.119 R)
• M86: 43,441,127 km (0.108 R)
• M87: 43,572,474 km (0.12 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.94 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 889.2

Radius: 7.3

Gravity: 16.69 G

Time & Orbit

Eccentricity (e): 0.232

Orbit Range: 6.1 AU - 9.78 AU

Year: 15727 Days

Day: 16.1 Hours

Environment

Temp: -237 °C

Axial Tilt: 36.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 70,712,441 km

• M1: 151,094 km (0.112 R)
• M2: 613,950 km (0.107 R)
• M3: 742,604 km (0.073 R)
• M4: 904,170 km (0.117 R)
• M5: 1,001,707 km (0.047 R)
• M6: 1,051,823 km (0.093 R)
• M7: 1,261,110 km (0.112 R)
• M8: 1,570,478 km (0.093 R)
• M9: 2,880,956 km (0.048 R)
• M10: 3,949,833 km (0.093 R)
• M11: 4,568,270 km (0.094 R)
• M12: 4,824,083 km (0.093 R)
• M13: 4,910,401 km (0.064 R)
• M14: 5,260,908 km (0.112 R)
• M15: 6,171,959 km (0.1 R)
• M16: 8,342,325 km (0.028 R)
• M17: 8,865,619 km (0.098 R)
• M18: 9,507,543 km (0.087 R)
• M19: 9,834,115 km (0.108 R)
• M20: 9,888,868 km (0.031 R)
• M21: 10,610,379 km (0.052 R)
• M22: 10,666,478 km (0.118 R)
• M23: 11,176,906 km (0.109 R)
• M24: 11,811,350 km (0.077 R)
• M25: 12,576,244 km (0.086 R)
• M26: 14,588,784 km (0.088 R)
• M27: 14,902,341 km (0.099 R)
• M28: 15,218,143 km (0.076 R)
• M29: 15,536,188 km (0.095 R)
• M30: 16,049,458 km (0.06 R)
• M31: 16,114,084 km (0.118 R)
• M32: 16,764,536 km (0.106 R)
• M33: 17,158,876 km (0.078 R)
• M34: 19,039,471 km (0.092 R)
• M35: 21,622,876 km (0.116 R)
• M36: 22,991,547 km (0.073 R)
• M37: 24,462,543 km (0.066 R)
• M38: 24,685,743 km (0.104 R)
• M39: 26,801,805 km (0.089 R)
• M40: 27,726,320 km (0.111 R)
• M41: 28,036,885 km (0.087 R)
• M42: 28,583,067 km (0.116 R)
• M43: 28,661,306 km (0.088 R)
• M44: 29,054,001 km (0.03 R)
• M45: 31,124,136 km (0.057 R)
• M46: 33,323,823 km (0.064 R)
• M47: 33,488,830 km (0.117 R)
• M48: 34,400,778 km (0.042 R)
• M49: 35,741,774 km (0.051 R)
• M50: 36,673,619 km (0.109 R)
• M51: 37,871,150 km (0.07 R)
• M52: 38,388,310 km (0.114 R)
• M53: 38,820,947 km (0.051 R)
• M54: 38,994,630 km (0.106 R)
• M55: 41,274,053 km (0.08 R)
• M56: 41,895,183 km (0.113 R)
• M57: 42,340,685 km (0.077 R)
• M58: 44,410,222 km (0.083 R)
• M59: 44,955,507 km (0.076 R)
• M60: 45,046,612 km (0.089 R)
• M61: 46,973,731 km (0.097 R)
• M62: 49,302,821 km (0.097 R)
• M63: 49,396,768 km (0.118 R)
• M64: 49,867,403 km (0.097 R)
• M65: 51,764,753 km (0.089 R)
• M66: 52,051,382 km (0.037 R)
• M67: 52,147,125 km (0.087 R)
• M68: 52,434,353 km (0.096 R)
• M69: 53,106,945 km (0.033 R)
• M70: 55,336,552 km (0.056 R)
• M71: 57,695,710 km (0.112 R)
• M72: 57,794,594 km (0.104 R)
• M73: 58,588,809 km (0.116 R)
• M74: 59,486,397 km (0.079 R)
• M75: 60,589,681 km (0.098 R)
• M76: 60,690,360 km (0.081 R)
• M77: 60,891,719 km (0.082 R)
• M78: 61,295,334 km (0.095 R)
• M79: 61,699,697 km (0.115 R)
• M80: 62,511,265 km (0.111 R)
• M81: 62,714,719 km (0.061 R)
• M82: 63,224,249 km (0.055 R)
• M83: 64,863,991 km (0.073 R)
• M84: 65,792,545 km (0.118 R)
• M85: 66,413,975 km (0.063 R)
• M86: 67,141,469 km (0.113 R)
• M87: 68,080,794 km (0.119 R)
• M88: 68,709,255 km (0.12 R)
• M89: 69,234,643 km (0.118 R)
• M90: 69,761,227 km (0.079 R)
• M91: 70,500,689 km (0.11 R)
• M92: 70,712,370 km (0.065 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: 341 - 18,685 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit