🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 440.7

Radius: 9.8

Gravity: 4.59 G

Time & Orbit

Eccentricity (e): 0.065

Orbit Range: 0.75 AU - 0.85 AU

Year: 503 Days

Day: 13.4 Hours

Environment

Temp: -160 °C

Axial Tilt: 12.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (45)

Outer Limit: 59,052,140 km

• M1: 122,371 km (0.085 R)
• M2: 192,981 km (0.119 R)
• M3: 278,252 km (0.077 R)
• M4: 354,098 km (0.058 R)
• M5: 491,579 km (0.076 R)
• M6: 596,896 km (0.1 R)
• M7: 702,811 km (0.043 R)
• M8: 811,419 km (0.115 R)
• M9: 887,265 km (0.112 R)
• M10: 987,795 km (0.09 R)
• M11: 1,106,426 km (0.098 R)
• M12: 1,239,718 km (0.049 R)
• M13: 1,303,446 km (0.116 R)
• M14: 1,434,494 km (0.112 R)
• M15: 1,496,577 km (0.091 R)
• M16: 1,575,415 km (0.055 R)
• M17: 1,699,133 km (0.077 R)
• M18: 1,776,026 km (0.115 R)
• M19: 1,837,361 km (0.061 R)
• M20: 1,927,718 km (0.046 R)
• M21: 2,025,555 km (0.03 R)
• M22: 2,095,717 km (0.08 R)
• M23: 2,292,737 km (0.093 R)
• M24: 2,520,874 km (0.117 R)
• M25: 2,672,865 km (0.11 R)
• M26: 2,814,983 km (0.09 R)
• M27: 2,886,940 km (0.113 R)
• M28: 3,160,704 km (0.095 R)
• M29: 3,422,051 km (0.078 R)
• M30: 3,590,798 km (0.084 R)
• M31: 3,719,153 km (0.05 R)
• M32: 3,863,664 km (0.078 R)
• M33: 3,943,998 km (0.067 R)
• M34: 4,024,781 km (0.106 R)
• M35: 4,180,662 km (0.101 R)
• M36: 4,300,789 km (0.113 R)
• M37: 4,368,856 km (0.031 R)
• M38: 4,552,114 km (0.096 R)
• M39: 4,621,527 km (0.113 R)
• M40: 4,722,356 km (0.07 R)
• M41: 4,800,446 km (0.117 R)
• M42: 4,863,277 km (0.106 R)
• M43: 4,973,830 km (0.111 R)
• M44: 5,278,262 km (0.065 R)
• M45: 5,408,262 km (0.087 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.49 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 548.3

Radius: 12.1

Gravity: 3.74 G

Time & Orbit

Eccentricity (e): 0.183

Orbit Range: 1.22 AU - 1.76 AU

Year: 1278 Days

Day: 11.6 Hours

Environment

Temp: -196 °C

Axial Tilt: 23.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (54)

Outer Limit: 59,052,140 km

• M1: 165,156 km (0.112 R)
• M2: 314,305 km (0.108 R)
• M3: 416,929 km (0.103 R)
• M4: 607,966 km (0.081 R)
• M5: 703,260 km (0.108 R)
• M6: 810,820 km (0.068 R)
• M7: 897,438 km (0.101 R)
• M8: 1,001,558 km (0.052 R)
• M9: 1,095,356 km (0.077 R)
• M10: 1,177,335 km (0.062 R)
• M11: 1,355,806 km (0.103 R)
• M12: 1,568,683 km (0.091 R)
• M13: 1,881,792 km (0.103 R)
• M14: 1,981,573 km (0.102 R)
• M15: 2,628,135 km (0.085 R)
• M16: 2,750,656 km (0.118 R)
• M17: 2,833,384 km (0.085 R)
• M18: 3,097,574 km (0.067 R)
• M19: 3,458,553 km (0.105 R)
• M20: 3,548,162 km (0.062 R)
• M21: 3,764,182 km (0.057 R)
• M22: 3,856,484 km (0.081 R)
• M23: 4,008,026 km (0.049 R)
• M24: 4,161,663 km (0.112 R)
• M25: 4,293,160 km (0.08 R)
• M26: 4,438,270 km (0.078 R)
• M27: 4,560,341 km (0.104 R)
• M28: 4,658,926 km (0.105 R)
• M29: 4,946,154 km (0.087 R)
• M30: 5,060,298 km (0.102 R)
• M31: 5,226,501 km (0.036 R)
• M32: 5,342,738 km (0.099 R)
• M33: 5,670,058 km (0.112 R)
• M34: 5,776,123 km (0.042 R)
• M35: 6,003,961 km (0.091 R)
• M36: 6,289,394 km (0.079 R)
• M37: 6,705,126 km (0.104 R)
• M38: 6,873,873 km (0.077 R)
• M39: 6,973,056 km (0.085 R)
• M40: 7,446,683 km (0.03 R)
• M41: 7,960,551 km (0.104 R)
• M42: 8,184,350 km (0.113 R)
• M43: 8,607,712 km (0.071 R)
• M44: 8,760,601 km (0.103 R)
• M45: 8,914,537 km (0.101 R)
• M46: 9,444,263 km (0.105 R)
• M47: 9,649,511 km (0.117 R)
• M48: 9,776,670 km (0.071 R)
• M49: 9,904,277 km (0.103 R)
• M50: 10,436,695 km (0.077 R)
• M51: 10,632,669 km (0.087 R)
• M52: 10,780,322 km (0.101 R)
• M53: 11,044,661 km (0.072 R)
• M54: 11,194,409 km (0.113 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.82 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 990.7

Radius: 14.4

Gravity: 4.78 G

Time & Orbit

Eccentricity (e): 0.085

Orbit Range: 2.58 AU - 3.06 AU

Year: 3329 Days

Day: 14.4 Hours

Environment

Temp: -204 °C

Axial Tilt: 10.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 59,052,140 km

• M1: 201,209 km (0.111 R)
• M2: 327,021 km (0.077 R)
• M3: 434,133 km (0.065 R)
• M4: 568,622 km (0.092 R)
• M5: 819,796 km (0.08 R)
• M6: 1,519,017 km (0.113 R)
• M7: 1,818,362 km (0.102 R)
• M8: 1,975,440 km (0.039 R)
• M9: 2,104,543 km (0.083 R)
• M10: 2,236,488 km (0.111 R)
• M11: 2,902,049 km (0.098 R)
• M12: 3,353,236 km (0.078 R)
• M13: 3,666,494 km (0.071 R)
• M14: 3,989,626 km (0.117 R)
• M15: 4,217,164 km (0.103 R)
• M16: 4,449,041 km (0.073 R)
• M17: 4,598,788 km (0.091 R)
• M18: 4,728,639 km (0.119 R)
• M19: 4,837,696 km (0.065 R)
• M20: 5,147,812 km (0.1 R)
• M21: 5,601,991 km (0.064 R)
• M22: 5,834,167 km (0.071 R)
• M23: 5,927,816 km (0.084 R)
• M24: 6,164,330 km (0.043 R)
• M25: 6,283,859 km (0.106 R)
• M26: 6,404,135 km (0.081 R)
• M27: 6,500,925 km (0.081 R)
• M28: 7,343,161 km (0.088 R)
• M29: 7,674,371 km (0.112 R)
• M30: 7,984,487 km (0.105 R)
• M31: 8,114,936 km (0.119 R)
• M32: 8,298,792 km (0.111 R)
• M33: 8,457,366 km (0.032 R)
• M34: 8,617,137 km (0.112 R)
• M35: 9,238,716 km (0.075 R)
• M36: 9,791,031 km (0.108 R)
• M37: 10,071,228 km (0.119 R)
• M38: 10,354,117 km (0.064 R)
• M39: 10,812,186 km (0.108 R)
• M40: 11,160,151 km (0.065 R)
• M41: 11,629,888 km (0.037 R)
• M42: 12,286,473 km (0.068 R)
• M43: 12,649,697 km (0.102 R)
• M44: 13,355,799 km (0.081 R)
• M45: 13,823,142 km (0.1 R)
• M46: 13,980,220 km (0.083 R)
• M47: 14,137,747 km (0.082 R)
• M48: 14,486,609 km (0.097 R)
• M49: 14,678,094 km (0.065 R)
• M50: 15,257,636 km (0.081 R)
• M51: 15,877,420 km (0.116 R)
• M52: 16,008,917 km (0.103 R)
• M53: 16,940,014 km (0.07 R)
• M54: 17,310,568 km (0.091 R)
• M55: 17,479,913 km (0.11 R)
• M56: 17,752,031 km (0.091 R)
• M57: 17,922,722 km (0.083 R)
• M58: 18,403,829 km (0.044 R)
• M59: 18,854,418 km (0.072 R)
• M60: 19,028,700 km (0.091 R)
• M61: 19,519,530 km (0.094 R)
• M62: 19,695,756 km (0.081 R)
• M63: 19,908,036 km (0.097 R)
• M64: 20,085,459 km (0.065 R)
• M65: 20,656,923 km (0.062 R)
• M66: 21,197,569 km (0.031 R)
• M67: 21,415,085 km (0.078 R)
• M68: 22,292,775 km (0.096 R)
• M69: 22,403,328 km (0.11 R)
• M70: 22,661,983 km (0.103 R)
• M71: 23,182,284 km (0.107 R)
• M72: 23,481,331 km (0.032 R)
• M73: 23,744,024 km (0.048 R)
• M74: 24,234,556 km (0.076 R)
• M75: 24,500,092 km (0.069 R)
• M76: 24,957,562 km (0.095 R)
• M77: 25,187,345 km (0.026 R)
• M78: 25,764,792 km (0.06 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.96 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 268.6

Radius: 12.5

Gravity: 1.72 G

Time & Orbit

Eccentricity (e): 0.123

Orbit Range: 3.47 AU - 4.45 AU

Year: 5539 Days

Day: 8.8 Hours

Environment

Temp: -223 °C

Axial Tilt: 32.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 59,052,140 km

• M1: 242,797 km (0.117 R)
• M2: 365,019 km (0.086 R)
• M3: 527,183 km (0.045 R)
• M4: 758,760 km (0.086 R)
• M5: 921,224 km (0.053 R)
• M6: 1,108,371 km (0.118 R)
• M7: 1,295,667 km (0.093 R)
• M8: 1,453,343 km (0.101 R)
• M9: 1,603,839 km (0.108 R)
• M10: 1,702,424 km (0.12 R)
• M11: 1,788,592 km (0.056 R)
• M12: 1,995,785 km (0.066 R)
• M13: 2,210,907 km (0.11 R)
• M14: 2,321,460 km (0.071 R)
• M15: 2,782,371 km (0.057 R)
• M16: 3,164,743 km (0.114 R)
• M17: 3,272,005 km (0.114 R)
• M18: 3,807,715 km (0.1 R)
• M19: 4,095,691 km (0.1 R)
• M20: 4,311,411 km (0.104 R)
• M21: 4,591,607 km (0.085 R)
• M22: 4,919,077 km (0.116 R)
• M23: 5,924,973 km (0.05 R)
• M24: 6,169,566 km (0.089 R)
• M25: 6,576,921 km (0.087 R)
• M26: 6,969,765 km (0.113 R)
• M27: 7,513,553 km (0.118 R)
• M28: 7,633,531 km (0.082 R)
• M29: 7,948,584 km (0.093 R)
• M30: 8,046,421 km (0.106 R)
• M31: 8,317,492 km (0.095 R)
• M32: 8,666,953 km (0.03 R)
• M33: 9,613,608 km (0.096 R)
• M34: 9,822,596 km (0.057 R)
• M35: 10,033,080 km (0.093 R)
• M36: 10,245,210 km (0.095 R)
• M37: 10,700,736 km (0.098 R)
• M38: 11,190,220 km (0.074 R)
• M39: 11,882,409 km (0.095 R)
• M40: 12,050,557 km (0.102 R)
• M41: 12,645,508 km (0.076 R)
• M42: 13,047,477 km (0.086 R)
• M43: 13,250,033 km (0.096 R)
• M44: 13,366,271 km (0.06 R)
• M45: 13,541,300 km (0.113 R)
• M46: 13,687,756 km (0.094 R)
• M47: 13,982,015 km (0.078 R)
• M48: 14,847,589 km (0.078 R)
• M49: 15,180,444 km (0.085 R)
• M50: 15,332,585 km (0.056 R)
• M51: 15,761,332 km (0.101 R)
• M52: 17,007,782 km (0.072 R)
• M53: 17,165,757 km (0.05 R)
• M54: 17,770,731 km (0.098 R)
• M55: 18,156,544 km (0.094 R)
• M56: 18,350,423 km (0.111 R)
• M57: 18,512,587 km (0.111 R)
• M58: 19,231,554 km (0.052 R)
• M59: 19,760,233 km (0.072 R)
• M60: 20,159,809 km (0.104 R)
• M61: 20,427,739 km (0.107 R)
• M62: 20,528,568 km (0.104 R)
• M63: 20,663,056 km (0.032 R)
• M64: 21,102,724 km (0.053 R)
• M65: 21,374,693 km (0.115 R)
• M66: 21,750,633 km (0.102 R)
• M67: 22,128,816 km (0.064 R)
• M68: 22,266,895 km (0.066 R)
• M69: 22,370,566 km (0.086 R)
• M70: 22,787,196 km (0.101 R)
• M71: 23,031,340 km (0.114 R)
• M72: 23,627,936 km (0.066 R)

Planet 5 - Ice Giant

Semi-Major Axis: 6.46 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 537.5

Radius: 7.3

Gravity: 10.09 G

Time & Orbit

Eccentricity (e): 0.117

Orbit Range: 5.7 AU - 7.22 AU

Year: 11541 Days

Day: 16.6 Hours

Environment

Temp: -226 °C

Axial Tilt: 36.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 59,052,140 km

• M1: 228,137 km (0.1 R)
• M2: 493,823 km (0.096 R)
• M3: 554,260 km (0.095 R)
• M4: 768,933 km (0.06 R)
• M5: 858,542 km (0.067 R)
• M6: 1,028,785 km (0.11 R)
• M7: 1,467,854 km (0.047 R)
• M8: 1,886,429 km (0.093 R)
• M9: 2,799,425 km (0.099 R)
• M10: 3,675,769 km (0.081 R)
• M11: 4,175,576 km (0.109 R)
• M12: 4,401,020 km (0.116 R)
• M13: 4,630,503 km (0.089 R)
• M14: 4,931,195 km (0.116 R)
• M15: 5,066,880 km (0.108 R)
• M16: 5,203,762 km (0.062 R)
• M17: 5,551,577 km (0.097 R)
• M18: 6,014,882 km (0.027 R)
• M19: 6,087,287 km (0.099 R)
• M20: 7,131,031 km (0.115 R)
• M21: 7,595,084 km (0.109 R)
• M22: 7,949,631 km (0.108 R)
• M23: 8,838,841 km (0.068 R)
• M24: 9,929,858 km (0.034 R)
• M25: 10,622,197 km (0.066 R)
• M26: 10,797,675 km (0.071 R)
• M27: 11,062,763 km (0.076 R)
• M28: 11,285,215 km (0.062 R)
• M29: 12,052,951 km (0.06 R)
• M30: 12,144,505 km (0.073 R)
• M31: 12,466,290 km (0.057 R)
• M32: 12,837,442 km (0.042 R)
• M33: 13,212,334 km (0.115 R)
• M34: 13,590,967 km (0.08 R)
• M35: 13,877,147 km (0.106 R)
• M36: 14,165,273 km (0.09 R)
• M37: 14,261,763 km (0.097 R)
• M38: 14,407,023 km (0.071 R)
• M39: 15,238,937 km (0.067 R)
• M40: 15,985,879 km (0.114 R)
• M41: 16,389,195 km (0.108 R)
• M42: 16,439,759 km (0.028 R)
• M43: 17,000,302 km (0.116 R)
• M44: 17,618,889 km (0.064 R)
• M45: 17,983,160 km (0.087 R)
• M46: 18,507,800 km (0.041 R)
• M47: 19,037,526 km (0.086 R)
• M48: 19,572,189 km (0.076 R)
• M49: 19,787,460 km (0.085 R)
• M50: 20,601,721 km (0.083 R)
• M51: 21,371,552 km (0.089 R)
• M52: 22,038,758 km (0.106 R)
• M53: 22,150,658 km (0.062 R)
• M54: 22,939,188 km (0.077 R)
• M55: 23,507,959 km (0.105 R)
• M56: 24,081,517 km (0.116 R)
• M57: 24,659,563 km (0.111 R)
• M58: 24,775,651 km (0.104 R)
• M59: 25,066,918 km (0.087 R)
• M60: 25,242,247 km (0.119 R)
• M61: 25,593,952 km (0.085 R)
• M62: 26,778,168 km (0.109 R)
• M63: 27,017,226 km (0.093 R)
• M64: 27,437,147 km (0.066 R)
• M65: 28,648,890 km (0.116 R)
• M66: 28,770,962 km (0.099 R)
• M67: 29,138,374 km (0.062 R)
• M68: 29,199,859 km (0.111 R)
• M69: 30,748,496 km (0.11 R)
• M70: 30,811,028 km (0.108 R)
• M71: 31,501,272 km (0.112 R)
• M72: 31,627,383 km (0.105 R)
• M73: 31,690,514 km (0.09 R)
• M74: 32,961,198 km (0.09 R)
• M75: 33,217,310 km (0.071 R)
• M76: 35,617,607 km (0.117 R)
• M77: 35,814,777 km (0.119 R)
• M78: 36,408,083 km (0.112 R)
• M79: 36,474,205 km (0.091 R)
• M80: 36,739,143 km (0.102 R)
• M81: 36,805,564 km (0.114 R)
• M82: 40,995,202 km (0.114 R)
• M83: 41,201,797 km (0.099 R)
• M84: 42,239,557 km (0.027 R)
• M85: 43,636,652 km (0.049 R)
• M86: 43,847,585 km (0.106 R)
• M87: 44,058,817 km (0.086 R)
• M88: 45,832,000 km (0.108 R)
• M89: 46,907,160 km (0.083 R)
• M90: 47,845,588 km (0.086 R)
• M91: 47,917,993 km (0.11 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.36 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 650.2

Radius: 5.1

Gravity: 25 G

Time & Orbit

Eccentricity (e): 0.04

Orbit Range: 7.07 AU - 7.65 AU

Year: 14035 Days

Day: 16.2 Hours

Environment

Temp: -226 °C

Axial Tilt: 18.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 59,052,140 km

• M1: 73,153 km (0.116 R)
• M2: 122,371 km (0.091 R)
• M3: 205,847 km (0.099 R)
• M4: 325,076 km (0.114 R)
• M5: 417,079 km (0.117 R)
• M6: 683,812 km (0.093 R)
• M7: 723,007 km (0.091 R)
• M8: 803,640 km (0.1 R)
• M9: 887,415 km (0.097 R)
• M10: 1,226,852 km (0.111 R)
• M11: 1,398,142 km (0.118 R)
• M12: 2,041,861 km (0.099 R)
• M13: 2,128,030 km (0.094 R)
• M14: 2,333,876 km (0.027 R)
• M15: 2,454,452 km (0.081 R)
• M16: 3,524,675 km (0.12 R)
• M17: 3,559,083 km (0.111 R)
• M18: 3,593,640 km (0.074 R)
• M19: 4,456,072 km (0.086 R)
• M20: 4,605,819 km (0.09 R)
• M21: 4,681,366 km (0.075 R)
• M22: 4,719,214 km (0.053 R)
• M23: 5,418,884 km (0.06 R)
• M24: 6,912,469 km (0.097 R)
• M25: 6,955,703 km (0.117 R)
• M26: 7,086,002 km (0.095 R)
• M27: 8,019,493 km (0.12 R)
• M28: 8,064,971 km (0.102 R)
• M29: 8,709,887 km (0.111 R)
• M30: 9,133,100 km (0.105 R)
• M31: 9,804,794 km (0.119 R)
• M32: 10,146,476 km (0.078 R)
• M33: 10,741,576 km (0.116 R)
• M34: 11,043,315 km (0.103 R)
• M35: 11,501,084 km (0.116 R)
• M36: 12,068,958 km (0.12 R)
• M37: 12,911,343 km (0.109 R)
• M38: 13,772,429 km (0.084 R)
• M39: 14,100,198 km (0.046 R)
• M40: 14,320,107 km (0.116 R)
• M41: 14,874,666 km (0.106 R)
• M42: 15,719,894 km (0.055 R)
• M43: 16,062,323 km (0.055 R)
• M44: 16,812,706 km (0.057 R)
• M45: 18,227,603 km (0.112 R)
• M46: 19,252,797 km (0.098 R)
• M47: 20,420,558 km (0.082 R)
• M48: 20,731,722 km (0.078 R)
• M49: 21,044,381 km (0.094 R)
• M50: 21,484,648 km (0.094 R)
• M51: 21,801,197 km (0.087 R)
• M52: 22,119,092 km (0.085 R)
• M53: 22,631,016 km (0.082 R)
• M54: 23,796,982 km (0.098 R)
• M55: 24,124,452 km (0.058 R)
• M56: 24,387,295 km (0.117 R)
• M57: 26,254,576 km (0.099 R)
• M58: 26,322,045 km (0.12 R)
• M59: 27,822,362 km (0.097 R)
• M60: 28,098,070 km (0.053 R)
• M61: 28,236,299 km (0.119 R)
• M62: 28,721,744 km (0.104 R)
• M63: 29,000,445 km (0.077 R)
• M64: 29,070,307 km (0.119 R)
• M65: 29,560,539 km (0.082 R)
• M66: 29,701,161 km (0.113 R)
• M67: 29,983,004 km (0.105 R)
• M68: 30,478,322 km (0.097 R)
• M69: 31,692,309 km (0.076 R)
• M70: 32,124,647 km (0.119 R)
• M71: 32,269,158 km (0.059 R)
• M72: 32,776,744 km (0.045 R)
• M73: 32,922,303 km (0.097 R)
• M74: 33,652,939 km (0.102 R)
• M75: 36,931,077 km (0.065 R)
• M76: 37,234,012 km (0.119 R)
• M77: 37,537,846 km (0.082 R)
• M78: 38,531,026 km (0.106 R)
• M79: 40,855,777 km (0.116 R)
• M80: 41,012,406 km (0.065 R)
• M81: 41,404,801 km (0.061 R)
• M82: 41,483,340 km (0.118 R)
• M83: 44,668,727 km (0.065 R)
• M84: 44,910,777 km (0.081 R)
• M85: 46,127,606 km (0.076 R)
• M86: 46,208,987 km (0.097 R)
• M87: 47,437,335 km (0.116 R)
• M88: 48,925,535 km (0.113 R)
• M89: 49,008,562 km (0.119 R)
• M90: 51,439,527 km (0.049 R)
• M91: 52,117,056 km (0.097 R)
• M92: 52,797,427 km (0.068 R)
• M93: 53,053,389 km (0.07 R)
• M94: 55,202,063 km (0.068 R)
• M95: 55,375,148 km (0.104 R)
• M96: 56,069,432 km (0.116 R)
• M97: 58,963,702 km (0.109 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 176 - 19,977 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit