🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.3 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.05

Radius: 1.33

Gravity: 1.16 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 1.23 AU - 1.37 AU

Year: 533 Days

Day: 28.3 Hours

Environment

Temp: -7 °C

Axial Tilt: 36.7 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 2 - Terrestrial

Semi-Major Axis: 2.73 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.06

Radius: 1.02

Gravity: 1.02 G

Time & Orbit

Eccentricity (e): 0.062

Orbit Range: 2.56 AU - 2.9 AU

Year: 1623 Days

Day: 12.5 Hours

Environment

Temp: -91 °C

Axial Tilt: 3.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 8.85 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 751.6

Radius: 14

Gravity: 3.83 G

Time & Orbit

Eccentricity (e): 0.17

Orbit Range: 7.35 AU - 10.35 AU

Year: 9475 Days

Day: 9.9 Hours

Environment

Temp: -163 °C

Axial Tilt: 33.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (87)

Outer Limit: 45,605,882 km

• M1: 186,100 km (0.106 R)
• M2: 396,734 km (0.06 R)
• M3: 705,354 km (0.111 R)
• M4: 1,073,066 km (0.098 R)
• M5: 1,229,246 km (0.111 R)
• M6: 1,372,560 km (0.1 R)
• M7: 1,500,167 km (0.1 R)
• M8: 1,676,843 km (0.046 R)
• M9: 2,223,922 km (0.084 R)
• M10: 2,907,135 km (0.105 R)
• M11: 3,045,813 km (0.119 R)
• M12: 3,652,881 km (0.069 R)
• M13: 4,078,636 km (0.075 R)
• M14: 4,265,933 km (0.077 R)
• M15: 4,424,357 km (0.084 R)
• M16: 4,681,965 km (0.107 R)
• M17: 4,779,802 km (0.085 R)
• M18: 6,766,910 km (0.119 R)
• M19: 7,176,958 km (0.105 R)
• M20: 7,442,195 km (0.118 R)
• M21: 7,749,170 km (0.041 R)
• M22: 7,943,348 km (0.093 R)
• M23: 8,816,401 km (0.037 R)
• M24: 9,141,477 km (0.088 R)
• M25: 9,553,320 km (0.083 R)
• M26: 9,803,448 km (0.11 R)
• M27: 11,173,764 km (0.097 R)
• M28: 11,481,637 km (0.093 R)
• M29: 12,331,053 km (0.063 R)
• M30: 13,247,191 km (0.106 R)
• M31: 14,185,319 km (0.059 R)
• M32: 15,339,167 km (0.08 R)
• M33: 16,224,338 km (0.086 R)
• M34: 16,573,051 km (0.096 R)
• M35: 16,974,721 km (0.056 R)
• M36: 18,612,967 km (0.106 R)
• M37: 18,717,087 km (0.073 R)
• M38: 19,030,495 km (0.104 R)
• M39: 19,927,932 km (0.117 R)
• M40: 20,731,273 km (0.052 R)
• M41: 20,839,133 km (0.086 R)
• M42: 21,327,121 km (0.101 R)
• M43: 21,709,194 km (0.032 R)
• M44: 21,818,700 km (0.084 R)
• M45: 21,983,557 km (0.04 R)
• M46: 22,093,511 km (0.105 R)
• M47: 22,314,168 km (0.042 R)
• M48: 22,924,826 km (0.083 R)
• M49: 23,148,176 km (0.049 R)
• M50: 23,709,916 km (0.106 R)
• M51: 24,904,156 km (0.117 R)
• M52: 25,827,175 km (0.072 R)
• M53: 26,702,622 km (0.101 R)
• M54: 26,996,581 km (0.116 R)
• M55: 27,232,647 km (0.101 R)
• M56: 27,469,311 km (0.09 R)
• M57: 27,706,573 km (0.042 R)
• M58: 27,825,503 km (0.119 R)
• M59: 28,063,962 km (0.112 R)
• M60: 28,722,941 km (0.05 R)
• M61: 30,056,307 km (0.113 R)
• M62: 32,532,002 km (0.085 R)
• M63: 32,846,008 km (0.057 R)
• M64: 33,097,931 km (0.086 R)
• M65: 33,794,159 km (0.107 R)
• M66: 34,687,258 km (0.114 R)
• M67: 35,136,800 km (0.041 R)
• M68: 35,523,510 km (0.115 R)
• M69: 36,431,569 km (0.075 R)
• M70: 37,281,585 km (0.114 R)
• M71: 37,478,755 km (0.043 R)
• M72: 37,610,251 km (0.108 R)
• M73: 38,072,060 km (0.114 R)
• M74: 38,469,392 km (0.107 R)
• M75: 40,274,140 km (0.052 R)
• M76: 41,492,765 km (0.052 R)
• M77: 41,969,832 km (0.085 R)
• M78: 43,067,282 km (0.065 R)
• M79: 43,827,239 km (0.073 R)
• M80: 44,521,972 km (0.079 R)
• M81: 44,731,110 km (0.056 R)
• M82: 45,150,433 km (0.058 R)
• M83: 45,430,629 km (0.073 R)
• M84: 46,204,200 km (0.047 R)
• M85: 46,628,011 km (0.083 R)
• M86: 46,840,440 km (0.096 R)
• M87: 47,266,195 km (0.086 R)

Planet 4 - Gas Giant

Semi-Major Axis: 10.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 125.3

Radius: 10.1

Gravity: 1.23 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 9.38 AU - 10.64 AU

Year: 11398 Days

Day: 10.2 Hours

Environment

Temp: -167 °C

Axial Tilt: 2.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 45,605,882 km

• M1: 126,560 km (0.096 R)
• M2: 256,710 km (0.037 R)
• M3: 398,529 km (0.103 R)
• M4: 517,459 km (0.1 R)
• M5: 684,859 km (0.118 R)
• M6: 819,796 km (0.097 R)
• M7: 1,354,609 km (0.067 R)
• M8: 1,447,808 km (0.081 R)
• M9: 1,592,021 km (0.072 R)
• M10: 1,690,905 km (0.119 R)
• M11: 1,774,829 km (0.076 R)
• M12: 2,143,139 km (0.082 R)
• M13: 2,478,089 km (0.08 R)
• M14: 2,593,429 km (0.032 R)
• M15: 3,472,017 km (0.11 R)
• M16: 3,688,784 km (0.061 R)
• M17: 3,754,757 km (0.072 R)
• M18: 3,821,029 km (0.039 R)
• M19: 3,887,749 km (0.115 R)
• M20: 4,412,389 km (0.104 R)
• M21: 4,529,375 km (0.111 R)
• M22: 4,671,194 km (0.044 R)
• M23: 4,983,404 km (0.119 R)
• M24: 5,056,558 km (0.055 R)
• M25: 5,327,479 km (0.115 R)
• M26: 6,725,471 km (0.102 R)
• M27: 7,353,783 km (0.108 R)
• M28: 7,437,109 km (0.096 R)
• M29: 7,773,704 km (0.102 R)
• M30: 7,886,949 km (0.106 R)
• M31: 7,972,220 km (0.042 R)
• M32: 8,607,562 km (0.09 R)
• M33: 8,842,581 km (0.055 R)
• M34: 9,349,119 km (0.11 R)
• M35: 9,439,476 km (0.109 R)
• M36: 10,484,118 km (0.066 R)
• M37: 10,735,143 km (0.107 R)
• M38: 11,083,706 km (0.12 R)
• M39: 11,275,341 km (0.119 R)
• M40: 12,250,270 km (0.048 R)
• M41: 12,481,698 km (0.095 R)
• M42: 12,681,112 km (0.068 R)
• M43: 13,049,572 km (0.068 R)
• M44: 13,150,700 km (0.095 R)
• M45: 13,455,431 km (0.109 R)
• M46: 13,694,189 km (0.06 R)
• M47: 14,003,258 km (0.08 R)
• M48: 14,141,337 km (0.069 R)
• M49: 14,279,865 km (0.049 R)
• M50: 14,593,272 km (0.051 R)
• M51: 14,803,457 km (0.093 R)
• M52: 15,654,220 km (0.072 R)
• M53: 15,761,632 km (0.06 R)
• M54: 17,217,817 km (0.116 R)
• M55: 17,439,970 km (0.093 R)
• M56: 17,588,670 km (0.081 R)
• M57: 17,812,319 km (0.1 R)
• M58: 18,983,222 km (0.115 R)
• M59: 19,790,602 km (0.11 R)
• M60: 20,452,273 km (0.082 R)
• M61: 20,805,623 km (0.101 R)
• M62: 20,963,299 km (0.112 R)
• M63: 21,438,572 km (0.069 R)
• M64: 21,877,492 km (0.088 R)
• M65: 22,158,287 km (0.113 R)
• M66: 22,642,535 km (0.057 R)
• M67: 22,764,158 km (0.086 R)
• M68: 23,375,415 km (0.117 R)
• M69: 23,621,504 km (0.068 R)
• M70: 23,744,772 km (0.117 R)
• M71: 24,489,321 km (0.092 R)
• M72: 25,073,800 km (0.107 R)
• M73: 26,383,978 km (0.094 R)
• M74: 26,554,669 km (0.107 R)
• M75: 26,811,529 km (0.066 R)
• M76: 27,327,342 km (0.101 R)
• M77: 27,846,596 km (0.114 R)
• M78: 28,063,962 km (0.119 R)
• M79: 28,238,244 km (0.071 R)
• M80: 28,412,824 km (0.077 R)
• M81: 29,291,263 km (0.081 R)

Planet 5 - Ice Giant

Semi-Major Axis: 13.36 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 865.2

Radius: 5.7

Gravity: 26.63 G

Time & Orbit

Eccentricity (e): 0.08

Orbit Range: 12.29 AU - 14.43 AU

Year: 17574 Days

Day: 23.5 Hours

Environment

Temp: -177 °C

Axial Tilt: 28.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 45,605,882 km

• M1: 300,243 km (0.077 R)
• M2: 502,350 km (0.087 R)
• M3: 939,175 km (0.102 R)
• M4: 990,637 km (0.102 R)
• M5: 1,096,702 km (0.089 R)
• M6: 1,151,305 km (0.057 R)
• M7: 1,378,245 km (0.106 R)
• M8: 1,557,763 km (0.115 R)
• M9: 1,744,760 km (0.065 R)
• M10: 2,174,555 km (0.094 R)
• M11: 2,313,232 km (0.103 R)
• M12: 2,526,708 km (0.099 R)
• M13: 3,087,850 km (0.095 R)
• M14: 3,727,381 km (0.091 R)
• M15: 4,104,816 km (0.072 R)
• M16: 4,363,022 km (0.104 R)
• M17: 4,450,387 km (0.113 R)
• M18: 5,401,530 km (0.077 R)
• M19: 5,495,328 km (0.091 R)
• M20: 5,589,724 km (0.119 R)
• M21: 5,636,997 km (0.096 R)
• M22: 6,020,866 km (0.1 R)
• M23: 6,118,104 km (0.094 R)
• M24: 6,314,227 km (0.117 R)
• M25: 7,586,108 km (0.054 R)
• M26: 8,170,288 km (0.08 R)
• M27: 8,604,122 km (0.101 R)
• M28: 10,065,094 km (0.113 R)
• M29: 10,824,004 km (0.096 R)
• M30: 12,088,256 km (0.094 R)
• M31: 12,396,128 km (0.088 R)
• M32: 14,102,741 km (0.05 R)
• M33: 14,950,362 km (0.095 R)
• M34: 16,083,566 km (0.047 R)
• M35: 16,490,024 km (0.043 R)
• M36: 16,762,890 km (0.105 R)
• M37: 17,382,375 km (0.028 R)
• M38: 18,079,501 km (0.092 R)
• M39: 20,443,746 km (0.026 R)
• M40: 20,590,202 km (0.118 R)
• M41: 20,957,614 km (0.043 R)
• M42: 21,327,271 km (0.108 R)
• M43: 21,475,822 km (0.065 R)
• M44: 23,055,425 km (0.084 R)
• M45: 23,284,161 km (0.037 R)
• M46: 23,897,661 km (0.06 R)
• M47: 24,827,861 km (0.09 R)
• M48: 25,454,676 km (0.107 R)
• M49: 25,928,153 km (0.102 R)
• M50: 29,075,842 km (0.06 R)
• M51: 29,322,828 km (0.081 R)
• M52: 31,747,062 km (0.038 R)
• M53: 34,061,191 km (0.042 R)
• M54: 36,074,779 km (0.078 R)
• M55: 36,873,182 km (0.049 R)
• M56: 37,408,743 km (0.103 R)
• M57: 37,677,421 km (0.084 R)
• M58: 39,576,416 km (0.111 R)
• M59: 40,307,949 km (0.101 R)
• M60: 40,675,511 km (0.118 R)
• M61: 40,951,819 km (0.062 R)
• M62: 42,435,979 km (0.064 R)
• M63: 43,278,664 km (0.042 R)
• M64: 43,372,611 km (0.079 R)
• M65: 44,032,188 km (0.053 R)
• M66: 44,221,280 km (0.103 R)
• M67: 44,600,361 km (0.09 R)
• M68: 44,980,340 km (0.097 R)
• M69: 45,647,995 km (0.107 R)
• M70: 46,318,942 km (0.105 R)
• M71: 46,511,324 km (0.106 R)
• M72: 47,379,890 km (0.12 R)
• M73: 47,961,975 km (0.081 R)
• M74: 49,919,164 km (0.057 R)
• M75: 54,012,461 km (0.1 R)
• M76: 55,434,538 km (0.108 R)
• M77: 55,638,739 km (0.101 R)
• M78: 55,740,915 km (0.056 R)
• M79: 56,457,937 km (0.117 R)
• M80: 61,667,234 km (0.098 R)
• M81: 62,940,163 km (0.102 R)
• M82: 63,046,676 km (0.102 R)
• M83: 63,686,806 km (0.049 R)
• M84: 64,973,347 km (0.085 R)
• M85: 65,511,900 km (0.105 R)
• M86: 66,702,100 km (0.089 R)
• M87: 67,354,197 km (0.113 R)
• M88: 71,311,510 km (0.06 R)
• M89: 71,755,815 km (0.117 R)
• M90: 72,312,469 km (0.09 R)
• M91: 72,870,619 km (0.11 R)
• M92: 73,542,313 km (0.034 R)
• M93: 74,103,604 km (0.071 R)
• M94: 74,553,595 km (0.071 R)
• M95: 75,230,376 km (0.026 R)

Planet 6 - Ice Giant

Semi-Major Axis: 13.46 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 123.2

Radius: 5.3

Gravity: 4.39 G

Time & Orbit

Eccentricity (e): 0.117

Orbit Range: 11.89 AU - 15.03 AU

Year: 17772 Days

Day: 22.2 Hours

Environment

Temp: -192 °C

Axial Tilt: 42.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 45,605,882 km

• M1: 69,413 km (0.097 R)
• M2: 282,291 km (0.103 R)
• M3: 431,739 km (0.044 R)
• M4: 663,018 km (0.1 R)
• M5: 753,225 km (0.062 R)
• M6: 912,697 km (0.096 R)
• M7: 1,065,436 km (0.077 R)
• M8: 1,208,152 km (0.049 R)
• M9: 1,263,204 km (0.074 R)
• M10: 1,733,989 km (0.086 R)
• M11: 1,817,465 km (0.059 R)
• M12: 2,009,997 km (0.106 R)
• M13: 2,119,802 km (0.104 R)
• M14: 2,164,232 km (0.112 R)
• M15: 2,391,322 km (0.101 R)
• M16: 2,602,405 km (0.104 R)
• M17: 3,296,539 km (0.108 R)
• M18: 3,504,929 km (0.082 R)
• M19: 3,557,587 km (0.118 R)
• M20: 3,798,440 km (0.118 R)
• M21: 4,267,578 km (0.059 R)
• M22: 4,667,454 km (0.114 R)
• M23: 4,842,633 km (0.08 R)
• M24: 5,289,781 km (0.115 R)
• M25: 5,350,368 km (0.09 R)
• M26: 5,472,440 km (0.104 R)
• M27: 5,750,093 km (0.077 R)
• M28: 5,875,008 km (0.106 R)
• M29: 6,480,729 km (0.062 R)
• M30: 7,307,407 km (0.11 R)
• M31: 7,510,711 km (0.057 R)
• M32: 7,613,185 km (0.069 R)
• M33: 7,715,959 km (0.09 R)
• M34: 7,819,331 km (0.066 R)
• M35: 8,733,673 km (0.077 R)
• M36: 8,805,331 km (0.092 R)
• M37: 8,985,596 km (0.114 R)
• M38: 9,130,556 km (0.086 R)
• M39: 9,166,909 km (0.074 R)
• M40: 9,276,414 km (0.086 R)
• M41: 9,570,374 km (0.045 R)
• M42: 9,904,725 km (0.051 R)
• M43: 9,979,524 km (0.112 R)
• M44: 10,016,924 km (0.104 R)
• M45: 10,054,473 km (0.11 R)
• M46: 10,280,665 km (0.042 R)
• M47: 10,318,513 km (0.075 R)
• M48: 11,397,263 km (0.064 R)
• M49: 11,475,653 km (0.108 R)
• M50: 12,632,643 km (0.063 R)
• M51: 13,535,017 km (0.108 R)
• M52: 13,576,456 km (0.077 R)
• M53: 13,701,220 km (0.092 R)
• M54: 13,742,958 km (0.101 R)
• M55: 13,910,059 km (0.087 R)
• M56: 14,246,355 km (0.117 R)
• M57: 15,400,951 km (0.103 R)
• M58: 15,574,634 km (0.044 R)
• M59: 15,748,916 km (0.028 R)
• M60: 16,496,606 km (0.057 R)
• M61: 16,718,759 km (0.086 R)
• M62: 16,986,689 km (0.104 R)
• M63: 17,346,023 km (0.069 R)
• M64: 17,571,915 km (0.073 R)
• M65: 19,133,568 km (0.091 R)
• M66: 20,357,428 km (0.074 R)
• M67: 21,219,411 km (0.088 R)
• M68: 21,509,481 km (0.044 R)
• M69: 22,387,321 km (0.117 R)
• M70: 22,731,845 km (0.073 R)
• M71: 23,028,498 km (0.051 R)
• M72: 26,324,139 km (0.048 R)
• M73: 28,317,830 km (0.027 R)
• M74: 28,371,087 km (0.105 R)
• M75: 28,477,301 km (0.097 R)
• M76: 29,386,557 km (0.081 R)
• M77: 29,763,843 km (0.112 R)
• M78: 31,123,837 km (0.082 R)
• M79: 31,398,349 km (0.107 R)
• M80: 31,673,609 km (0.118 R)
• M81: 32,171,022 km (0.098 R)
• M82: 32,337,375 km (0.069 R)
• M83: 32,949,978 km (0.032 R)
• M84: 33,173,627 km (0.114 R)
• M85: 33,341,775 km (0.113 R)
• M86: 34,073,608 km (0.119 R)
• M87: 34,186,554 km (0.069 R)
• M88: 35,038,364 km (0.03 R)
• M89: 35,152,508 km (0.068 R)
• M90: 35,610,128 km (0.079 R)
• M91: 35,782,315 km (0.116 R)
• M92: 37,227,430 km (0.033 R)
• M93: 37,518,697 km (0.053 R)
• M94: 37,752,219 km (0.083 R)
• M95: 38,573,661 km (0.107 R)
• M96: 38,986,551 km (0.087 R)

Planet 7 - Ice Giant

Semi-Major Axis: 14.33 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 154.8

Radius: 5.6

Gravity: 4.94 G

Time & Orbit

Eccentricity (e): 0.237

Orbit Range: 10.93 AU - 17.73 AU

Year: 19523 Days

Day: 20.1 Hours

Environment

Temp: -188 °C

Axial Tilt: 49.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (66)

Outer Limit: 45,605,882 km

• M1: 102,175 km (0.098 R)
• M2: 755,619 km (0.111 R)
• M3: 824,284 km (0.074 R)
• M4: 1,361,041 km (0.081 R)
• M5: 1,531,284 km (0.086 R)
• M6: 1,618,948 km (0.108 R)
• M7: 1,663,379 km (0.09 R)
• M8: 1,776,475 km (0.115 R)
• M9: 2,609,884 km (0.084 R)
• M10: 2,688,723 km (0.111 R)
• M11: 2,794,787 km (0.108 R)
• M12: 2,848,493 km (0.098 R)
• M13: 2,902,348 km (0.072 R)
• M14: 3,038,782 km (0.049 R)
• M15: 3,233,259 km (0.107 R)
• M16: 3,990,822 km (0.025 R)
• M17: 4,051,260 km (0.075 R)
• M18: 4,173,182 km (0.072 R)
• M19: 4,389,351 km (0.092 R)
• M20: 4,640,975 km (0.034 R)
• M21: 4,994,475 km (0.081 R)
• M22: 5,390,161 km (0.093 R)
• M23: 5,830,128 km (0.094 R)
• M24: 5,933,351 km (0.097 R)
• M25: 7,180,997 km (0.094 R)
• M26: 7,217,798 km (0.05 R)
• M27: 8,780,497 km (0.074 R)
• M28: 9,620,041 km (0.078 R)
• M29: 10,028,742 km (0.081 R)
• M30: 10,736,340 km (0.118 R)
• M31: 13,450,644 km (0.09 R)
• M32: 15,023,965 km (0.107 R)
• M33: 16,217,456 km (0.105 R)
• M34: 16,314,246 km (0.108 R)
• M35: 16,605,812 km (0.078 R)
• M36: 16,948,092 km (0.057 R)
• M37: 18,139,191 km (0.11 R)
• M38: 18,744,912 km (0.119 R)
• M39: 19,101,255 km (0.05 R)
• M40: 19,459,841 km (0.108 R)
• M41: 19,665,687 km (0.092 R)
• M42: 20,496,554 km (0.073 R)
• M43: 20,601,272 km (0.116 R)
• M44: 22,515,377 km (0.112 R)
• M45: 24,930,784 km (0.07 R)
• M46: 24,986,734 km (0.057 R)
• M47: 25,603,676 km (0.098 R)
• M48: 25,942,365 km (0.098 R)
• M49: 26,910,114 km (0.116 R)
• M50: 27,254,488 km (0.114 R)
• M51: 27,831,637 km (0.098 R)
• M52: 29,174,278 km (0.104 R)
• M53: 30,657,540 km (0.065 R)
• M54: 32,104,451 km (0.108 R)
• M55: 32,165,188 km (0.106 R)
• M56: 33,635,136 km (0.086 R)
• M57: 33,758,555 km (0.085 R)
• M58: 33,944,056 km (0.12 R)
• M59: 34,191,940 km (0.108 R)
• M60: 34,440,422 km (0.029 R)
• M61: 35,943,731 km (0.063 R)
• M62: 37,468,283 km (0.08 R)
• M63: 38,367,366 km (0.117 R)
• M64: 39,208,704 km (0.115 R)
• M65: 41,569,658 km (0.067 R)
• M66: 43,370,517 km (0.082 R)

Kuiper Belt

Range: 30.5 - 46.5 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 206 - 17,534 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit