🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.57 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 808.1

Radius: 8.1

Gravity: 12.32 G

Time & Orbit

Eccentricity (e): 0.058

Orbit Range: 0.54 AU - 0.6 AU

Year: 292 Days

Day: 5.8 Hours

Environment

Temp: -143 °C

Axial Tilt: 13.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 70,214,163 km

• M1: 120,426 km (0.103 R)
• M2: 193,430 km (0.085 R)
• M3: 249,380 km (0.066 R)
• M4: 303,534 km (0.084 R)
• M5: 360,232 km (0.105 R)
• M6: 453,730 km (0.04 R)
• M7: 540,198 km (0.116 R)
• M8: 599,139 km (0.092 R)
• M9: 684,859 km (0.084 R)
• M10: 752,926 km (0.117 R)
• M11: 812,167 km (0.064 R)
• M12: 959,670 km (0.087 R)
• M13: 1,111,811 km (0.097 R)
• M14: 1,236,726 km (0.088 R)
• M15: 1,289,833 km (0.09 R)
• M16: 1,426,117 km (0.092 R)
• M17: 1,477,279 km (0.114 R)
• M18: 1,567,187 km (0.038 R)
• M19: 1,634,656 km (0.031 R)
• M20: 1,732,792 km (0.117 R)
• M21: 1,822,850 km (0.079 R)
• M22: 1,883,736 km (0.084 R)
• M23: 2,012,839 km (0.098 R)
• M24: 2,086,442 km (0.084 R)
• M25: 2,155,556 km (0.098 R)
• M26: 2,230,953 km (0.119 R)
• M27: 2,334,774 km (0.112 R)
• M28: 2,423,336 km (0.066 R)
• M29: 2,501,725 km (0.086 R)
• M30: 2,598,216 km (0.093 R)
• M31: 2,678,550 km (0.114 R)
• M32: 2,777,284 km (0.114 R)
• M33: 2,859,563 km (0.098 R)
• M34: 2,924,788 km (0.104 R)
• M35: 2,978,494 km (0.065 R)
• M36: 3,099,069 km (0.085 R)
• M37: 3,202,890 km (0.12 R)
• M38: 3,270,658 km (0.066 R)
• M39: 3,338,875 km (0.11 R)
• M40: 3,426,390 km (0.091 R)
• M41: 3,565,665 km (0.104 R)
• M42: 3,642,259 km (0.109 R)
• M43: 3,726,034 km (0.072 R)
• M44: 3,797,392 km (0.116 R)
• M45: 3,856,184 km (0.101 R)
• M46: 3,915,126 km (0.111 R)
• M47: 3,967,934 km (0.032 R)
• M48: 4,201,456 km (0.105 R)
• M49: 4,529,076 km (0.083 R)
• M50: 4,674,933 km (0.075 R)
• M51: 4,751,976 km (0.059 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 95.6

Radius: 8.3

Gravity: 1.39 G

Time & Orbit

Eccentricity (e): 0.125

Orbit Range: 1.37 AU - 1.76 AU

Year: 1322 Days

Day: 9.6 Hours

Environment

Temp: -197 °C

Axial Tilt: 47 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 70,214,163 km

• M1: 107,710 km (0.111 R)
• M2: 159,771 km (0.115 R)
• M3: 367,113 km (0.115 R)
• M4: 442,810 km (0.065 R)
• M5: 528,679 km (0.111 R)
• M6: 587,920 km (0.116 R)
• M7: 714,031 km (0.091 R)
• M8: 831,016 km (0.079 R)
• M9: 1,028,635 km (0.104 R)
• M10: 1,084,285 km (0.112 R)
• M11: 1,151,455 km (0.069 R)
• M12: 1,246,898 km (0.118 R)
• M13: 1,311,973 km (0.1 R)
• M14: 1,372,710 km (0.114 R)
• M15: 1,584,241 km (0.097 R)
• M16: 1,655,151 km (0.109 R)
• M17: 1,757,476 km (0.043 R)
• M18: 1,830,928 km (0.119 R)
• M19: 2,012,989 km (0.025 R)
• M20: 2,083,599 km (0.107 R)
• M21: 2,161,540 km (0.098 R)
• M22: 2,293,784 km (0.048 R)
• M23: 2,394,763 km (0.095 R)
• M24: 2,476,593 km (0.094 R)
• M25: 2,849,241 km (0.102 R)
• M26: 2,928,827 km (0.098 R)
• M27: 3,082,763 km (0.116 R)
• M28: 3,134,823 km (0.113 R)
• M29: 3,368,346 km (0.051 R)
• M30: 3,592,144 km (0.085 R)
• M31: 3,852,594 km (0.06 R)
• M32: 3,924,700 km (0.1 R)
• M33: 4,086,715 km (0.073 R)
• M34: 4,184,851 km (0.103 R)
• M35: 4,317,095 km (0.085 R)
• M36: 4,442,309 km (0.095 R)
• M37: 4,560,192 km (0.103 R)
• M38: 4,868,364 km (0.101 R)
• M39: 5,156,788 km (0.104 R)
• M40: 5,236,374 km (0.059 R)
• M41: 5,307,433 km (0.086 R)
• M42: 5,468,700 km (0.074 R)
• M43: 5,622,486 km (0.11 R)
• M44: 5,740,968 km (0.069 R)
• M45: 6,008,449 km (0.102 R)
• M46: 6,261,269 km (0.056 R)
• M47: 6,393,663 km (0.099 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.36 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 742.6

Radius: 9.9

Gravity: 7.58 G

Time & Orbit

Eccentricity (e): 0.155

Orbit Range: 2.84 AU - 3.88 AU

Year: 4177 Days

Day: 10.8 Hours

Environment

Temp: -224 °C

Axial Tilt: 24.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 70,214,163 km

• M1: 168,447 km (0.109 R)
• M2: 244,593 km (0.071 R)
• M3: 325,974 km (0.083 R)
• M4: 476,469 km (0.097 R)
• M5: 566,677 km (0.114 R)
• M6: 708,346 km (0.057 R)
• M7: 1,149,809 km (0.076 R)
• M8: 1,319,304 km (0.118 R)
• M9: 1,421,928 km (0.049 R)
• M10: 1,794,726 km (0.096 R)
• M11: 1,975,739 km (0.077 R)
• M12: 2,215,096 km (0.115 R)
• M13: 2,356,017 km (0.055 R)
• M14: 2,445,776 km (0.027 R)
• M15: 2,873,027 km (0.074 R)
• M16: 3,066,158 km (0.082 R)
• M17: 3,243,731 km (0.112 R)
• M18: 3,343,812 km (0.095 R)
• M19: 3,506,275 km (0.119 R)
• M20: 3,860,074 km (0.108 R)
• M21: 4,116,634 km (0.106 R)
• M22: 4,247,084 km (0.037 R)
• M23: 4,423,310 km (0.092 R)
• M24: 4,556,901 km (0.099 R)
• M25: 4,805,532 km (0.095 R)
• M26: 5,268,837 km (0.069 R)
• M27: 5,990,796 km (0.115 R)
• M28: 7,079,121 km (0.064 R)
• M29: 7,686,039 km (0.115 R)
• M30: 7,982,243 km (0.111 R)
• M31: 8,392,291 km (0.091 R)
• M32: 8,585,871 km (0.115 R)
• M33: 8,809,071 km (0.054 R)
• M34: 9,034,215 km (0.059 R)
• M35: 9,289,729 km (0.119 R)
• M36: 9,375,448 km (0.073 R)
• M37: 9,461,467 km (0.06 R)
• M38: 9,895,301 km (0.036 R)
• M39: 10,012,137 km (0.072 R)
• M40: 10,276,626 km (0.092 R)
• M41: 10,483,968 km (0.075 R)
• M42: 11,023,418 km (0.06 R)
• M43: 11,114,224 km (0.055 R)
• M44: 11,235,548 km (0.063 R)
• M45: 11,387,988 km (0.063 R)
• M46: 11,694,963 km (0.117 R)
• M47: 12,066,863 km (0.069 R)
• M48: 12,254,310 km (0.117 R)
• M49: 14,280,014 km (0.104 R)
• M50: 14,844,298 km (0.077 R)
• M51: 15,213,355 km (0.081 R)
• M52: 15,280,675 km (0.085 R)
• M53: 15,687,282 km (0.096 R)
• M54: 15,994,556 km (0.032 R)
• M55: 16,372,889 km (0.05 R)
• M56: 16,580,530 km (0.092 R)
• M57: 16,649,944 km (0.1 R)
• M58: 16,858,633 km (0.057 R)
• M59: 17,068,219 km (0.034 R)
• M60: 17,243,698 km (0.061 R)
• M61: 18,812,381 km (0.098 R)
• M62: 19,981,788 km (0.086 R)
• M63: 20,240,742 km (0.046 R)
• M64: 20,463,642 km (0.112 R)
• M65: 20,986,786 km (0.056 R)
• M66: 21,249,929 km (0.112 R)
• M67: 21,931,796 km (0.07 R)
• M68: 22,505,653 km (0.054 R)
• M69: 22,852,272 km (0.105 R)
• M70: 23,239,431 km (0.076 R)
• M71: 23,433,758 km (0.057 R)
• M72: 23,667,879 km (0.09 R)
• M73: 23,981,137 km (0.087 R)
• M74: 24,059,526 km (0.07 R)
• M75: 24,177,559 km (0.104 R)
• M76: 24,730,473 km (0.062 R)
• M77: 26,090,766 km (0.069 R)
• M78: 26,211,941 km (0.111 R)
• M79: 26,739,273 km (0.069 R)
• M80: 27,106,386 km (0.1 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.78 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 652.8

Radius: 11.8

Gravity: 4.69 G

Time & Orbit

Eccentricity (e): 0.178

Orbit Range: 3.11 AU - 4.45 AU

Year: 4985 Days

Day: 5.8 Hours

Environment

Temp: -210 °C

Axial Tilt: 142.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 70,214,163 km

• M1: 160,519 km (0.118 R)
• M2: 486,642 km (0.114 R)
• M3: 635,791 km (0.118 R)
• M4: 716,873 km (0.095 R)
• M5: 814,411 km (0.085 R)
• M6: 1,165,068 km (0.113 R)
• M7: 1,297,462 km (0.051 R)
• M8: 1,643,033 km (0.118 R)
• M9: 1,878,201 km (0.093 R)
• M10: 2,306,949 km (0.08 R)
• M11: 2,456,696 km (0.105 R)
• M12: 2,805,708 km (0.046 R)
• M13: 3,026,963 km (0.074 R)
• M14: 3,233,259 km (0.075 R)
• M15: 4,013,561 km (0.069 R)
• M16: 4,217,762 km (0.108 R)
• M17: 4,309,466 km (0.106 R)
• M18: 4,448,592 km (0.113 R)
• M19: 4,731,033 km (0.098 R)
• M20: 5,165,914 km (0.056 R)
• M21: 5,588,528 km (0.12 R)
• M22: 6,152,212 km (0.101 R)
• M23: 6,308,991 km (0.103 R)
• M24: 6,440,787 km (0.094 R)
• M25: 6,680,293 km (0.105 R)
• M26: 7,140,755 km (0.105 R)
• M27: 7,305,762 km (0.116 R)
• M28: 7,527,765 km (0.098 R)
• M29: 7,864,958 km (0.054 R)
• M30: 8,322,130 km (0.115 R)
• M31: 8,641,671 km (0.093 R)
• M32: 8,788,127 km (0.062 R)
• M33: 8,906,010 km (0.108 R)
• M34: 9,173,042 km (0.116 R)
• M35: 9,959,478 km (0.118 R)
• M36: 10,298,766 km (0.072 R)
• M37: 10,704,625 km (0.117 R)
• M38: 10,925,282 km (0.058 R)
• M39: 11,083,856 km (0.108 R)
• M40: 11,435,411 km (0.11 R)
• M41: 11,532,051 km (0.096 R)
• M42: 11,693,467 km (0.101 R)
• M43: 12,578,488 km (0.054 R)
• M44: 12,811,562 km (0.12 R)
• M45: 13,383,325 km (0.117 R)
• M46: 13,791,876 km (0.053 R)
• M47: 14,482,121 km (0.114 R)
• M48: 14,761,420 km (0.088 R)
• M49: 16,184,395 km (0.086 R)
• M50: 16,437,814 km (0.105 R)
• M51: 16,583,373 km (0.029 R)
• M52: 16,692,729 km (0.029 R)
• M53: 16,838,886 km (0.041 R)
• M54: 17,502,053 km (0.12 R)
• M55: 17,762,354 km (0.05 R)
• M56: 17,837,003 km (0.089 R)
• M57: 17,911,652 km (0.092 R)
• M58: 18,023,851 km (0.111 R)
• M59: 18,173,897 km (0.075 R)
• M60: 18,626,431 km (0.056 R)
• M61: 19,044,557 km (0.095 R)
• M62: 20,512,710 km (0.082 R)
• M63: 20,590,950 km (0.055 R)
• M64: 20,708,534 km (0.111 R)
• M65: 21,856,997 km (0.117 R)
• M66: 22,177,436 km (0.027 R)
• M67: 22,701,477 km (0.067 R)
• M68: 23,066,645 km (0.09 R)
• M69: 23,148,027 km (0.084 R)
• M70: 23,433,758 km (0.095 R)
• M71: 25,298,496 km (0.053 R)
• M72: 25,930,547 km (0.109 R)
• M73: 26,142,378 km (0.096 R)
• M74: 26,440,077 km (0.084 R)
• M75: 26,567,834 km (0.113 R)
• M76: 27,038,618 km (0.037 R)
• M77: 27,511,946 km (0.115 R)
• M78: 27,598,264 km (0.083 R)
• M79: 27,814,732 km (0.092 R)
• M80: 28,031,499 km (0.061 R)
• M81: 28,249,015 km (0.113 R)
• M82: 28,598,027 km (0.052 R)
• M83: 28,948,684 km (0.108 R)
• M84: 29,344,670 km (0.079 R)
• M85: 29,565,476 km (0.116 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.23 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 240.1

Radius: 10.2

Gravity: 2.31 G

Time & Orbit

Eccentricity (e): 0.05

Orbit Range: 4.97 AU - 5.49 AU

Year: 8112 Days

Day: 15 Hours

Environment

Temp: -228 °C

Axial Tilt: 35 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 70,214,163 km

• M1: 134,189 km (0.064 R)
• M2: 222,302 km (0.107 R)
• M3: 406,308 km (0.105 R)
• M4: 546,331 km (0.085 R)
• M5: 852,259 km (0.085 R)
• M6: 1,080,396 km (0.094 R)
• M7: 1,151,305 km (0.072 R)
• M8: 1,389,465 km (0.072 R)
• M9: 2,035,279 km (0.101 R)
• M10: 2,160,343 km (0.101 R)
• M11: 2,647,284 km (0.085 R)
• M12: 3,004,224 km (0.114 R)
• M13: 3,188,379 km (0.075 R)
• M14: 3,313,443 km (0.109 R)
• M15: 3,568,208 km (0.105 R)
• M16: 3,962,548 km (0.106 R)
• M17: 4,052,158 km (0.101 R)
• M18: 4,440,364 km (0.066 R)
• M19: 4,912,345 km (0.114 R)
• M20: 4,984,601 km (0.098 R)
• M21: 5,474,983 km (0.106 R)
• M22: 6,135,607 km (0.084 R)
• M23: 6,265,608 km (0.077 R)
• M24: 6,956,151 km (0.048 R)
• M25: 7,037,383 km (0.09 R)
• M26: 7,420,802 km (0.08 R)
• M27: 7,642,955 km (0.111 R)
• M28: 7,754,854 km (0.077 R)
• M29: 8,150,840 km (0.069 R)
• M30: 8,437,619 km (0.091 R)
• M31: 8,757,160 km (0.075 R)
• M32: 8,844,974 km (0.054 R)
• M33: 9,080,591 km (0.046 R)
• M34: 9,258,612 km (0.09 R)
• M35: 9,739,121 km (0.081 R)
• M36: 10,506,258 km (0.053 R)
• M37: 11,292,844 km (0.088 R)
• M38: 11,388,437 km (0.064 R)
• M39: 11,484,479 km (0.097 R)
• M40: 12,000,592 km (0.062 R)
• M41: 12,098,279 km (0.085 R)
• M42: 12,524,483 km (0.111 R)
• M43: 13,391,553 km (0.054 R)
• M44: 14,209,105 km (0.099 R)
• M45: 14,381,442 km (0.099 R)
• M46: 15,077,820 km (0.064 R)
• M47: 15,183,286 km (0.084 R)
• M48: 16,142,957 km (0.098 R)
• M49: 16,358,976 km (0.107 R)
• M50: 16,612,096 km (0.116 R)
• M51: 16,684,651 km (0.068 R)
• M52: 17,526,737 km (0.106 R)
• M53: 17,785,840 km (0.102 R)
• M54: 17,860,041 km (0.088 R)
• M55: 18,570,631 km (0.087 R)
• M56: 19,062,060 km (0.05 R)
• M57: 19,252,199 km (0.081 R)
• M58: 19,481,383 km (0.073 R)
• M59: 20,173,871 km (0.079 R)
• M60: 20,290,109 km (0.101 R)
• M61: 20,601,123 km (0.107 R)
• M62: 20,679,063 km (0.111 R)
• M63: 21,267,132 km (0.091 R)
• M64: 22,179,680 km (0.112 R)
• M65: 22,580,303 km (0.111 R)
• M66: 22,781,661 km (0.093 R)
• M67: 23,104,942 km (0.114 R)
• M68: 24,124,751 km (0.113 R)
• M69: 24,495,604 km (0.099 R)
• M70: 24,578,182 km (0.093 R)
• M71: 24,702,348 km (0.112 R)
• M72: 25,326,321 km (0.095 R)
• M73: 26,632,161 km (0.096 R)
• M74: 27,058,066 km (0.11 R)
• M75: 27,486,215 km (0.092 R)
• M76: 27,615,019 km (0.042 R)
• M77: 28,653,378 km (0.042 R)
• M78: 28,784,126 km (0.09 R)
• M79: 28,914,875 km (0.065 R)
• M80: 29,133,587 km (0.064 R)
• M81: 29,221,102 km (0.105 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.97 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 924.5

Radius: 3.5

Gravity: 75.47 G

Time & Orbit

Eccentricity (e): 0.225

Orbit Range: 6.18 AU - 9.76 AU

Year: 15261 Days

Day: 17.7 Hours

Environment

Temp: -234 °C

Axial Tilt: 35.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 70,214,163 km

• M1: 159,771 km (0.096 R)
• M2: 257,009 km (0.101 R)
• M3: 288,275 km (0.081 R)
• M4: 337,642 km (0.115 R)
• M5: 542,891 km (0.097 R)
• M6: 626,067 km (0.111 R)
• M7: 1,287,738 km (0.07 R)
• M8: 1,371,064 km (0.078 R)
• M9: 1,484,759 km (0.107 R)
• M10: 1,631,365 km (0.08 R)
• M11: 1,721,423 km (0.091 R)
• M12: 2,098,260 km (0.05 R)
• M13: 2,130,722 km (0.026 R)
• M14: 2,499,481 km (0.116 R)
• M15: 2,603,601 km (0.049 R)
• M16: 3,033,695 km (0.066 R)
• M17: 3,219,346 km (0.092 R)
• M18: 3,798,290 km (0.109 R)
• M19: 3,917,968 km (0.077 R)
• M20: 4,038,843 km (0.077 R)
• M21: 4,201,905 km (0.107 R)
• M22: 5,092,760 km (0.053 R)
• M23: 5,491,887 km (0.096 R)
• M24: 5,717,930 km (0.079 R)
• M25: 6,748,210 km (0.041 R)
• M26: 7,733,163 km (0.1 R)
• M27: 7,834,141 km (0.11 R)
• M28: 8,448,989 km (0.115 R)
• M29: 9,079,244 km (0.036 R)
• M30: 10,495,936 km (0.065 R)
• M31: 10,551,736 km (0.112 R)
• M32: 10,776,133 km (0.052 R)
• M33: 11,979,648 km (0.117 R)
• M34: 12,154,977 km (0.043 R)
• M35: 12,686,348 km (0.117 R)
• M36: 12,805,428 km (0.104 R)
• M37: 14,016,423 km (0.116 R)
• M38: 14,386,827 km (0.074 R)
• M39: 14,948,418 km (0.099 R)
• M40: 15,200,340 km (0.086 R)
• M41: 15,390,180 km (0.089 R)
• M42: 16,351,197 km (0.047 R)
• M43: 16,415,973 km (0.051 R)
• M44: 18,330,676 km (0.112 R)
• M45: 19,075,224 km (0.1 R)
• M46: 20,384,206 km (0.068 R)
• M47: 20,453,918 km (0.11 R)
• M48: 20,873,840 km (0.113 R)
• M49: 21,367,213 km (0.12 R)
• M50: 21,579,942 km (0.113 R)
• M51: 22,078,851 km (0.046 R)
• M52: 22,293,823 km (0.086 R)
• M53: 22,653,606 km (0.119 R)
• M54: 24,629,644 km (0.093 R)
• M55: 25,675,782 km (0.08 R)
• M56: 27,118,504 km (0.112 R)
• M57: 28,978,304 km (0.088 R)
• M58: 29,765,189 km (0.061 R)
• M59: 30,002,751 km (0.116 R)
• M60: 30,798,761 km (0.108 R)
• M61: 31,763,218 km (0.114 R)
• M62: 33,064,421 km (0.062 R)
• M63: 34,051,617 km (0.109 R)
• M64: 34,798,559 km (0.091 R)
• M65: 35,132,162 km (0.097 R)
• M66: 35,383,038 km (0.114 R)
• M67: 36,816,186 km (0.067 R)
• M68: 38,354,201 km (0.094 R)
• M69: 39,738,879 km (0.062 R)
• M70: 39,913,161 km (0.1 R)
• M71: 40,000,376 km (0.113 R)
• M72: 40,788,009 km (0.116 R)
• M73: 41,757,852 km (0.06 R)
• M74: 42,289,972 km (0.071 R)
• M75: 43,002,955 km (0.053 R)
• M76: 49,502,235 km (0.107 R)
• M77: 51,103,231 km (0.09 R)
• M78: 52,052,878 km (0.077 R)
• M79: 52,148,172 km (0.101 R)
• M80: 53,200,144 km (0.08 R)
• M81: 55,519,510 km (0.117 R)
• M82: 55,616,748 km (0.073 R)
• M83: 56,202,125 km (0.098 R)
• M84: 57,378,862 km (0.098 R)
• M85: 57,871,637 km (0.108 R)
• M86: 58,069,106 km (0.03 R)
• M87: 59,656,938 km (0.114 R)
• M88: 60,356,159 km (0.087 R)
• M89: 60,756,931 km (0.118 R)
• M90: 61,964,485 km (0.104 R)
• M91: 62,773,810 km (0.119 R)
• M92: 65,737,194 km (0.117 R)
• M93: 67,495,418 km (0.062 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 490 - 20,199 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit