🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.72 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.31

Radius: 1.4

Gravity: 1.18 G

Time & Orbit

Eccentricity (e): 0.215

Orbit Range: 0.57 AU - 0.87 AU

Year: 221 Days

Day: 42.2 Hours

Environment

Temp: 137 °C

Axial Tilt: 15.2 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 75,597,433 km

• M1: 456,573 km (0.089 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.68 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.97

Radius: 1.9

Gravity: 1.38 G

Time & Orbit

Eccentricity (e): 0.08

Orbit Range: 1.55 AU - 1.81 AU

Year: 788 Days

Day: 33.4 Hours

Environment

Temp: -48 °C

Axial Tilt: 18.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 1.8 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.68

Radius: 1.85

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.179

Orbit Range: 1.48 AU - 2.12 AU

Year: 873 Days

Day: 16.7 Hours

Environment

Temp: -62 °C

Axial Tilt: 37.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 2.96 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.63

Radius: 0.83

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.051

Orbit Range: 2.81 AU - 3.11 AU

Year: 1842 Days

Day: 16.8 Hours

Environment

Temp: -103 °C

Axial Tilt: 19.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 6.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 994.7

Radius: 8.8

Gravity: 12.84 G

Time & Orbit

Eccentricity (e): 0.17

Orbit Range: 5.43 AU - 7.65 AU

Year: 6049 Days

Day: 14.7 Hours

Environment

Temp: -143 °C

Axial Tilt: 10.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 75,597,433 km

• M1: 112,946 km (0.075 R)
• M2: 180,565 km (0.098 R)
• M3: 244,443 km (0.082 R)
• M4: 310,565 km (0.116 R)
• M5: 430,842 km (0.11 R)
• M6: 555,307 km (0.068 R)
• M7: 622,477 km (0.12 R)
• M8: 736,171 km (0.115 R)
• M9: 936,632 km (0.086 R)
• M10: 1,243,009 km (0.04 R)
• M11: 1,502,561 km (0.069 R)
• M12: 1,779,317 km (0.119 R)
• M13: 1,882,240 km (0.11 R)
• M14: 1,987,109 km (0.074 R)
• M15: 2,115,613 km (0.095 R)
• M16: 2,426,178 km (0.112 R)
• M17: 2,586,996 km (0.031 R)
• M18: 2,870,933 km (0.07 R)
• M19: 2,943,488 km (0.041 R)
• M20: 3,366,251 km (0.086 R)
• M21: 3,702,547 km (0.025 R)
• M22: 3,781,834 km (0.103 R)
• M23: 4,213,574 km (0.102 R)
• M24: 5,123,727 km (0.106 R)
• M25: 5,182,519 km (0.085 R)
• M26: 6,092,672 km (0.054 R)
• M27: 6,375,263 km (0.114 R)
• M28: 6,662,192 km (0.061 R)
• M29: 7,084,207 km (0.116 R)
• M30: 7,149,881 km (0.088 R)
• M31: 8,091,001 km (0.109 R)
• M32: 8,401,716 km (0.086 R)
• M33: 9,683,321 km (0.116 R)
• M34: 9,756,324 km (0.082 R)
• M35: 9,976,383 km (0.043 R)
• M36: 10,124,036 km (0.089 R)
• M37: 10,496,385 km (0.082 R)
• M38: 10,721,829 km (0.092 R)
• M39: 10,987,066 km (0.077 R)
• M40: 12,543,333 km (0.113 R)
• M41: 13,063,784 km (0.091 R)
• M42: 13,796,215 km (0.08 R)
• M43: 14,709,360 km (0.1 R)
• M44: 15,599,168 km (0.112 R)
• M45: 15,684,888 km (0.071 R)
• M46: 17,032,466 km (0.101 R)
• M47: 17,297,703 km (0.059 R)
• M48: 18,507,501 km (0.076 R)
• M49: 18,598,157 km (0.081 R)
• M50: 18,871,173 km (0.114 R)
• M51: 18,962,428 km (0.062 R)
• M52: 19,513,397 km (0.094 R)
• M53: 20,116,126 km (0.114 R)
• M54: 21,008,029 km (0.086 R)
• M55: 21,625,719 km (0.116 R)
• M56: 21,769,033 km (0.038 R)
• M57: 22,008,689 km (0.107 R)
• M58: 22,345,733 km (0.106 R)
• M59: 22,490,693 km (0.091 R)
• M60: 22,587,483 km (0.106 R)
• M61: 23,220,282 km (0.051 R)
• M62: 23,416,106 km (0.038 R)
• M63: 23,661,746 km (0.11 R)
• M64: 24,702,498 km (0.116 R)
• M65: 25,203,352 km (0.071 R)
• M66: 25,303,881 km (0.093 R)
• M67: 25,657,082 km (0.111 R)
• M68: 25,859,488 km (0.045 R)
• M69: 26,062,492 km (0.111 R)
• M70: 26,572,471 km (0.053 R)
• M71: 26,674,796 km (0.042 R)
• M72: 27,446,721 km (0.104 R)
• M73: 28,225,977 km (0.067 R)
• M74: 29,223,645 km (0.044 R)
• M75: 30,660,981 km (0.036 R)
• M76: 32,887,297 km (0.103 R)
• M77: 34,047,727 km (0.086 R)
• M78: 35,333,820 km (0.117 R)
• M79: 35,446,467 km (0.055 R)
• M80: 37,264,231 km (0.091 R)
• M81: 37,378,823 km (0.08 R)
• M82: 38,531,475 km (0.076 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.78 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 143.1

Radius: 8.7

Gravity: 1.89 G

Time & Orbit

Eccentricity (e): 0.008

Orbit Range: 6.73 AU - 6.83 AU

Year: 6385 Days

Day: 10.3 Hours

Environment

Temp: -165 °C

Axial Tilt: 8.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 75,597,433 km

• M1: 123,269 km (0.088 R)
• M2: 186,249 km (0.115 R)
• M3: 315,203 km (0.083 R)
• M4: 416,480 km (0.11 R)
• M5: 556,504 km (0.11 R)
• M6: 693,685 km (0.072 R)
• M7: 969,394 km (0.073 R)
• M8: 1,069,026 km (0.084 R)
• M9: 1,172,099 km (0.062 R)
• M10: 1,488,798 km (0.034 R)
• M11: 1,670,559 km (0.052 R)
• M12: 1,737,130 km (0.091 R)
• M13: 2,012,989 km (0.118 R)
• M14: 2,377,260 km (0.118 R)
• M15: 2,574,879 km (0.081 R)
• M16: 2,793,890 km (0.061 R)
• M17: 3,216,653 km (0.096 R)
• M18: 3,452,719 km (0.101 R)
• M19: 3,642,110 km (0.117 R)
• M20: 4,013,262 km (0.076 R)
• M21: 4,212,676 km (0.037 R)
• M22: 4,285,829 km (0.106 R)
• M23: 4,359,581 km (0.096 R)
• M24: 4,489,731 km (0.117 R)
• M25: 4,621,078 km (0.095 R)
• M26: 4,830,066 km (0.093 R)
• M27: 5,296,812 km (0.117 R)
• M28: 5,356,202 km (0.085 R)
• M29: 5,495,627 km (0.081 R)
• M30: 5,737,378 km (0.12 R)
• M31: 5,921,084 km (0.103 R)
• M32: 6,148,173 km (0.038 R)
• M33: 6,336,218 km (0.112 R)
• M34: 6,547,300 km (0.11 R)
• M35: 6,611,029 km (0.084 R)
• M36: 6,760,627 km (0.098 R)
• M37: 6,933,113 km (0.097 R)
• M38: 6,998,188 km (0.066 R)
• M39: 7,085,105 km (0.098 R)
• M40: 7,172,620 km (0.104 R)
• M41: 7,592,541 km (0.112 R)
• M42: 7,659,710 km (0.092 R)
• M43: 8,088,906 km (0.087 R)
• M44: 8,249,126 km (0.101 R)
• M45: 8,595,894 km (0.115 R)
• M46: 8,994,572 km (0.041 R)
• M47: 9,255,770 km (0.032 R)
• M48: 9,351,363 km (0.081 R)
• M49: 9,471,340 km (0.093 R)
• M50: 9,640,236 km (0.11 R)
• M51: 10,005,405 km (0.067 R)
• M52: 10,079,007 km (0.045 R)
• M53: 10,350,377 km (0.039 R)
• M54: 10,424,877 km (0.066 R)
• M55: 10,574,176 km (0.092 R)
• M56: 10,875,167 km (0.087 R)
• M57: 11,306,308 km (0.114 R)
• M58: 11,691,373 km (0.11 R)
• M59: 11,794,745 km (0.08 R)
• M60: 12,845,670 km (0.036 R)
• M61: 12,925,705 km (0.086 R)
• M62: 13,247,490 km (0.1 R)
• M63: 13,409,355 km (0.092 R)
• M64: 13,981,118 km (0.096 R)
• M65: 14,588,635 km (0.069 R)
• M66: 14,727,910 km (0.102 R)
• M67: 15,148,430 km (0.099 R)
• M68: 15,402,597 km (0.108 R)
• M69: 15,572,839 km (0.086 R)
• M70: 15,658,260 km (0.097 R)
• M71: 16,957,218 km (0.085 R)
• M72: 17,397,933 km (0.11 R)
• M73: 17,782,998 km (0.117 R)
• M74: 18,320,653 km (0.059 R)
• M75: 18,440,780 km (0.085 R)
• M76: 19,015,385 km (0.094 R)
• M77: 19,228,562 km (0.058 R)
• M78: 19,411,969 km (0.117 R)
• M79: 19,565,158 km (0.08 R)
• M80: 20,089,199 km (0.08 R)
• M81: 20,337,531 km (0.076 R)
• M82: 20,774,357 km (0.058 R)
• M83: 20,899,720 km (0.045 R)

Planet 7 - Gas Giant

Semi-Major Axis: 12.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 36.5

Radius: 8.6

Gravity: 0.49 G

Time & Orbit

Eccentricity (e): 0.19

Orbit Range: 9.75 AU - 14.33 AU

Year: 15109 Days

Day: 11.4 Hours

Environment

Temp: -190 °C

Axial Tilt: 16.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 75,597,433 km

• M1: 150,346 km (0.07 R)
• M2: 275,260 km (0.095 R)
• M3: 428,747 km (0.081 R)
• M4: 544,835 km (0.105 R)
• M5: 682,615 km (0.116 R)
• M6: 832,213 km (0.098 R)
• M7: 911,350 km (0.11 R)
• M8: 1,028,934 km (0.084 R)
• M9: 1,398,890 km (0.119 R)
• M10: 1,605,933 km (0.072 R)
• M11: 1,778,719 km (0.112 R)
• M12: 1,912,459 km (0.097 R)
• M13: 2,269,400 km (0.043 R)
• M14: 2,480,333 km (0.07 R)
• M15: 2,596,720 km (0.086 R)
• M16: 3,277,540 km (0.09 R)
• M17: 3,895,080 km (0.102 R)
• M18: 4,167,946 km (0.12 R)
• M19: 4,247,084 km (0.106 R)
• M20: 4,507,683 km (0.083 R)
• M21: 4,650,100 km (0.106 R)
• M22: 4,752,874 km (0.113 R)
• M23: 4,835,602 km (0.033 R)
• M24: 4,918,778 km (0.116 R)
• M25: 5,171,299 km (0.085 R)
• M26: 5,277,663 km (0.117 R)
• M27: 5,536,168 km (0.093 R)
• M28: 6,043,305 km (0.104 R)
• M29: 6,336,517 km (0.109 R)
• M30: 6,450,511 km (0.098 R)
• M31: 6,611,328 km (0.056 R)
• M32: 6,983,827 km (0.064 R)
• M33: 7,172,620 km (0.102 R)
• M34: 7,435,014 km (0.063 R)
• M35: 7,627,846 km (0.068 R)
• M36: 7,920,310 km (0.073 R)
• M37: 8,266,030 km (0.083 R)
• M38: 8,390,795 km (0.077 R)
• M39: 8,768,530 km (0.111 R)
• M40: 9,436,634 km (0.047 R)
• M41: 9,935,243 km (0.099 R)
• M42: 10,041,308 km (0.084 R)
• M43: 10,121,044 km (0.097 R)
• M44: 10,523,163 km (0.117 R)
• M45: 10,848,688 km (0.12 R)
• M46: 11,122,452 km (0.115 R)
• M47: 11,343,109 km (0.095 R)
• M48: 13,687,308 km (0.102 R)
• M49: 13,864,581 km (0.049 R)
• M50: 14,400,889 km (0.034 R)
• M51: 14,822,755 km (0.114 R)
• M52: 15,157,107 km (0.041 R)
• M53: 15,957,306 km (0.057 R)
• M54: 16,456,364 km (0.118 R)
• M55: 16,771,118 km (0.073 R)
• M56: 17,055,952 km (0.04 R)
• M57: 17,119,382 km (0.111 R)
• M58: 17,342,283 km (0.096 R)
• M59: 18,765,557 km (0.096 R)
• M60: 19,424,835 km (0.043 R)
• M61: 20,326,910 km (0.118 R)
• M62: 21,072,057 km (0.117 R)
• M63: 21,860,587 km (0.078 R)
• M64: 22,067,780 km (0.073 R)
• M65: 22,833,422 km (0.066 R)
• M66: 22,938,590 km (0.059 R)
• M67: 23,536,981 km (0.12 R)
• M68: 23,607,741 km (0.045 R)

Planet 8 - Ice Giant

Semi-Major Axis: 14.06 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 816.9

Radius: 6.9

Gravity: 17.16 G

Time & Orbit

Eccentricity (e): 0.182

Orbit Range: 11.5 AU - 16.62 AU

Year: 19066 Days

Day: 20.4 Hours

Environment

Temp: -184 °C

Axial Tilt: 39.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 75,597,433 km

• M1: 175,927 km (0.12 R)
• M2: 1,233,285 km (0.105 R)
• M3: 1,852,321 km (0.106 R)
• M4: 2,123,841 km (0.105 R)
• M5: 3,915,425 km (0.062 R)
• M6: 4,001,444 km (0.112 R)
• M7: 4,131,744 km (0.09 R)
• M8: 4,219,408 km (0.111 R)
• M9: 4,441,112 km (0.067 R)
• M10: 4,531,020 km (0.109 R)
• M11: 4,989,089 km (0.116 R)
• M12: 5,801,256 km (0.047 R)
• M13: 7,598,973 km (0.115 R)
• M14: 7,814,694 km (0.111 R)
• M15: 7,868,848 km (0.027 R)
• M16: 8,032,358 km (0.049 R)
• M17: 8,866,516 km (0.101 R)
• M18: 9,437,830 km (0.11 R)
• M19: 10,138,996 km (0.115 R)
• M20: 10,257,477 km (0.092 R)
• M21: 13,042,840 km (0.071 R)
• M22: 14,020,013 km (0.089 R)
• M23: 14,218,380 km (0.099 R)
• M24: 14,284,652 km (0.089 R)
• M25: 16,182,301 km (0.117 R)
• M26: 16,808,966 km (0.119 R)
• M27: 16,949,289 km (0.09 R)
• M28: 17,090,061 km (0.089 R)
• M29: 17,160,521 km (0.108 R)
• M30: 17,514,620 km (0.114 R)
• M31: 17,656,887 km (0.092 R)
• M32: 18,590,976 km (0.096 R)
• M33: 18,954,499 km (0.078 R)
• M34: 20,732,021 km (0.119 R)
• M35: 22,176,538 km (0.109 R)
• M36: 22,716,885 km (0.072 R)
• M37: 23,261,571 km (0.1 R)
• M38: 23,653,368 km (0.086 R)
• M39: 24,047,110 km (0.115 R)
• M40: 24,363,808 km (0.064 R)
• M41: 25,081,429 km (0.091 R)
• M42: 26,455,635 km (0.094 R)
• M43: 28,688,084 km (0.119 R)
• M44: 29,023,782 km (0.072 R)
• M45: 29,276,602 km (0.033 R)
• M46: 30,124,374 km (0.056 R)
• M47: 33,594,895 km (0.062 R)
• M48: 34,037,555 km (0.062 R)
• M49: 36,370,384 km (0.119 R)
• M50: 37,007,222 km (0.061 R)
• M51: 38,291,819 km (0.059 R)
• M52: 39,032,478 km (0.062 R)
• M53: 39,311,478 km (0.088 R)
• M54: 39,404,528 km (0.112 R)
• M55: 39,591,076 km (0.052 R)
• M56: 39,871,423 km (0.115 R)
• M57: 41,093,637 km (0.116 R)
• M58: 41,282,729 km (0.115 R)
• M59: 41,566,965 km (0.085 R)
• M60: 42,137,382 km (0.083 R)
• M61: 42,901,827 km (0.091 R)
• M62: 42,997,719 km (0.093 R)
• M63: 43,093,761 km (0.078 R)
• M64: 44,444,779 km (0.093 R)
• M65: 47,386,173 km (0.048 R)
• M66: 47,882,389 km (0.114 R)
• M67: 48,680,194 km (0.096 R)
• M68: 49,080,668 km (0.104 R)
• M69: 49,180,898 km (0.115 R)
• M70: 49,884,906 km (0.08 R)
• M71: 50,997,914 km (0.111 R)
• M72: 51,099,491 km (0.098 R)
• M73: 51,404,671 km (0.108 R)
• M74: 51,608,423 km (0.104 R)
• M75: 52,939,545 km (0.119 R)
• M76: 53,042,468 km (0.086 R)
• M77: 54,282,036 km (0.053 R)
• M78: 55,322,190 km (0.088 R)
• M79: 56,579,111 km (0.119 R)
• M80: 57,211,162 km (0.107 R)
• M81: 60,298,563 km (0.067 R)
• M82: 61,700,146 km (0.057 R)
• M83: 62,025,072 km (0.102 R)
• M84: 63,112,350 km (0.071 R)
• M85: 64,865,038 km (0.09 R)
• M86: 66,300,879 km (0.085 R)
• M87: 70,105,302 km (0.076 R)
• M88: 70,444,441 km (0.049 R)
• M89: 70,670,782 km (0.12 R)
• M90: 71,578,542 km (0.088 R)
• M91: 71,692,386 km (0.075 R)
• M92: 73,176,546 km (0.045 R)
• M93: 73,405,880 km (0.117 R)
• M94: 74,555,689 km (0.085 R)
• M95: 74,901,709 km (0.091 R)
• M96: 76,059,297 km (0.041 R)
• M97: 76,407,711 km (0.06 R)

Planet 9 - Ice Giant

Semi-Major Axis: 16.42 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 464.1

Radius: 7.4

Gravity: 8.48 G

Time & Orbit

Eccentricity (e): 0.227

Orbit Range: 12.69 AU - 20.15 AU

Year: 24063 Days

Day: 18.4 Hours

Environment

Temp: -198 °C

Axial Tilt: 47.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 75,597,433 km

• M1: 94,396 km (0.06 R)
• M2: 230,680 km (0.111 R)
• M3: 886,068 km (0.056 R)
• M4: 987,346 km (0.045 R)
• M5: 1,674,000 km (0.053 R)
• M6: 1,996,234 km (0.093 R)
• M7: 2,096,764 km (0.112 R)
• M8: 2,998,241 km (0.097 R)
• M9: 3,388,990 km (0.034 R)
• M10: 3,672,029 km (0.086 R)
• M11: 3,795,747 km (0.068 R)
• M12: 4,004,885 km (0.07 R)
• M13: 4,699,617 km (0.114 R)
• M14: 6,051,533 km (0.116 R)
• M15: 6,543,860 km (0.119 R)
• M16: 6,794,885 km (0.095 R)
• M17: 8,584,075 km (0.049 R)
• M18: 9,304,539 km (0.08 R)
• M19: 9,929,409 km (0.105 R)
• M20: 10,450,608 km (0.105 R)
• M21: 10,509,101 km (0.077 R)
• M22: 10,744,119 km (0.106 R)
• M23: 11,040,173 km (0.116 R)
• M24: 12,747,833 km (0.094 R)
• M25: 13,061,240 km (0.098 R)
• M26: 13,631,956 km (0.115 R)
• M27: 13,888,367 km (0.077 R)
• M28: 14,081,498 km (0.06 R)
• M29: 17,361,730 km (0.112 R)
• M30: 18,340,400 km (0.114 R)
• M31: 18,411,010 km (0.094 R)
• M32: 20,132,283 km (0.106 R)
• M33: 21,382,323 km (0.04 R)
• M34: 22,279,611 km (0.088 R)
• M35: 22,960,730 km (0.094 R)
• M36: 24,265,971 km (0.117 R)
• M37: 25,911,099 km (0.108 R)
• M38: 28,814,195 km (0.082 R)
• M39: 29,970,737 km (0.072 R)
• M40: 31,479,880 km (0.107 R)
• M41: 31,988,363 km (0.045 R)
• M42: 32,414,268 km (0.092 R)
• M43: 32,585,109 km (0.118 R)
• M44: 32,670,679 km (0.084 R)
• M45: 33,013,557 km (0.094 R)
• M46: 33,185,445 km (0.107 R)
• M47: 33,876,139 km (0.105 R)
• M48: 35,535,329 km (0.067 R)
• M49: 36,330,441 km (0.049 R)
• M50: 37,668,594 km (0.037 R)
• M51: 39,204,665 km (0.11 R)
• M52: 41,686,195 km (0.105 R)
• M53: 43,745,409 km (0.103 R)
• M54: 44,123,294 km (0.035 R)
• M55: 45,741,643 km (0.084 R)
• M56: 46,509,978 km (0.073 R)
• M57: 48,351,677 km (0.095 R)
• M58: 48,449,215 km (0.101 R)
• M59: 52,908,279 km (0.082 R)
• M60: 53,109,488 km (0.082 R)
• M61: 54,423,556 km (0.049 R)
• M62: 54,728,287 km (0.09 R)
• M63: 55,237,368 km (0.052 R)
• M64: 57,289,851 km (0.096 R)
• M65: 59,995,179 km (0.111 R)
• M66: 67,264,439 km (0.099 R)
• M67: 67,700,516 km (0.116 R)
• M68: 68,466,158 km (0.049 R)
• M69: 72,002,353 km (0.061 R)
• M70: 75,031,859 km (0.041 R)

Kuiper Belt

Range: 30.3 - 58.3 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 212 - 12,753 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit