🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.27 AU

Composition

Type: Inner System (Rocky)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.53 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.02

Radius: 1.01

Gravity: 1 G

Time & Orbit

Eccentricity (e): 0.055

Orbit Range: 0.5 AU - 0.56 AU

Year: 253 Days

Day: 41.8 Hours

Environment

Temp: -126 °C

Axial Tilt: 1.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 1.11 AU

Composition

Type: Far Outer (Icy/Cometary)

A dense region of planetesimals and debris.

Boundary

Planet 2 - Gas Giant

Semi-Major Axis: 1.68 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 352.6

Radius: 12.7

Gravity: 2.19 G

Time & Orbit

Eccentricity (e): 0.062

Orbit Range: 1.58 AU - 1.78 AU

Year: 1428 Days

Day: 10.8 Hours

Environment

Temp: -188 °C

Axial Tilt: 26 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (57)

Outer Limit: 48,452,748 km

• M1: 161,566 km (0.108 R)
• M2: 277,055 km (0.118 R)
• M3: 361,877 km (0.07 R)
• M4: 460,761 km (0.074 R)
• M5: 728,841 km (0.107 R)
• M6: 825,930 km (0.117 R)
• M7: 954,135 km (0.111 R)
• M8: 1,034,619 km (0.048 R)
• M9: 1,124,677 km (0.11 R)
• M10: 1,210,396 km (0.104 R)
• M11: 1,313,320 km (0.101 R)
• M12: 1,568,384 km (0.06 R)
• M13: 1,657,096 km (0.083 R)
• M14: 1,797,718 km (0.077 R)
• M15: 1,925,325 km (0.08 R)
• M16: 2,047,097 km (0.095 R)
• M17: 2,317,271 km (0.048 R)
• M18: 2,428,572 km (0.099 R)
• M19: 2,637,560 km (0.098 R)
• M20: 2,724,776 km (0.118 R)
• M21: 2,822,762 km (0.099 R)
• M22: 2,912,072 km (0.11 R)
• M23: 3,073,339 km (0.117 R)
• M24: 3,258,242 km (0.117 R)
• M25: 3,542,777 km (0.05 R)
• M26: 3,715,263 km (0.079 R)
• M27: 3,890,442 km (0.059 R)
• M28: 3,990,374 km (0.119 R)
• M29: 4,102,273 km (0.09 R)
• M30: 4,375,289 km (0.113 R)
• M31: 4,725,049 km (0.064 R)
• M32: 4,927,305 km (0.113 R)
• M33: 5,083,934 km (0.063 R)
• M34: 5,242,209 km (0.115 R)
• M35: 5,328,078 km (0.046 R)
• M36: 5,676,641 km (0.034 R)
• M37: 5,777,619 km (0.108 R)
• M38: 5,968,506 km (0.097 R)
• M39: 6,213,398 km (0.088 R)
• M40: 6,487,910 km (0.078 R)
• M41: 6,659,798 km (0.056 R)
• M42: 6,833,332 km (0.101 R)
• M43: 6,954,356 km (0.117 R)
• M44: 7,280,480 km (0.098 R)
• M45: 7,542,276 km (0.077 R)
• M46: 7,653,577 km (0.062 R)
• M47: 7,962,197 km (0.088 R)
• M48: 8,346,514 km (0.075 R)
• M49: 8,620,577 km (0.082 R)
• M50: 8,853,800 km (0.088 R)
• M51: 9,281,800 km (0.032 R)
• M52: 9,430,949 km (0.039 R)
• M53: 9,686,313 km (0.064 R)
• M54: 9,883,183 km (0.12 R)
• M55: 10,050,883 km (0.105 R)
• M56: 10,219,479 km (0.05 R)
• M57: 10,342,598 km (0.051 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 516.5

Radius: 14.3

Gravity: 2.53 G

Time & Orbit

Eccentricity (e): 0.16

Orbit Range: 1.63 AU - 2.25 AU

Year: 1773 Days

Day: 8 Hours

Environment

Temp: -192 °C

Axial Tilt: 33.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (60)

Outer Limit: 48,452,748 km

• M1: 193,580 km (0.105 R)
• M2: 294,857 km (0.088 R)
• M3: 445,802 km (0.112 R)
• M4: 620,532 km (0.074 R)
• M5: 728,691 km (0.103 R)
• M6: 874,549 km (0.073 R)
• M7: 999,015 km (0.093 R)
• M8: 1,241,662 km (0.093 R)
• M9: 1,580,053 km (0.087 R)
• M10: 1,735,784 km (0.059 R)
• M11: 1,835,865 km (0.12 R)
• M12: 2,021,067 km (0.065 R)
• M13: 2,180,389 km (0.083 R)
• M14: 2,366,190 km (0.113 R)
• M15: 2,546,006 km (0.1 R)
• M16: 2,649,229 km (0.114 R)
• M17: 3,261,084 km (0.093 R)
• M18: 3,423,996 km (0.082 R)
• M19: 3,837,036 km (0.099 R)
• M20: 4,036,300 km (0.092 R)
• M21: 4,334,748 km (0.118 R)
• M22: 4,445,151 km (0.087 R)
• M23: 4,668,650 km (0.108 R)
• M24: 4,796,108 km (0.099 R)
• M25: 5,040,102 km (0.084 R)
• M26: 5,244,004 km (0.116 R)
• M27: 5,406,317 km (0.074 R)
• M28: 6,289,244 km (0.096 R)
• M29: 6,461,880 km (0.079 R)
• M30: 6,604,297 km (0.104 R)
• M31: 6,747,762 km (0.113 R)
• M32: 7,233,506 km (0.06 R)
• M33: 7,397,914 km (0.091 R)
• M34: 7,882,013 km (0.106 R)
• M35: 8,051,357 km (0.104 R)
• M36: 8,187,641 km (0.081 R)
• M37: 8,290,415 km (0.054 R)
• M38: 8,497,159 km (0.059 R)
• M39: 8,775,710 km (0.067 R)
• M40: 8,916,033 km (0.088 R)
• M41: 9,057,104 km (0.032 R)
• M42: 9,181,270 km (0.046 R)
• M43: 9,611,065 km (0.036 R)
• M44: 9,773,977 km (0.099 R)
• M45: 9,937,787 km (0.116 R)
• M46: 10,065,842 km (0.119 R)
• M47: 10,453,450 km (0.11 R)
• M48: 10,770,747 km (0.074 R)
• M49: 10,864,695 km (0.113 R)
• M50: 11,129,184 km (0.058 R)
• M51: 11,262,176 km (0.058 R)
• M52: 11,568,254 km (0.115 R)
• M53: 11,799,682 km (0.11 R)
• M54: 11,974,262 km (0.104 R)
• M55: 12,208,383 km (0.026 R)
• M56: 12,384,909 km (0.116 R)
• M57: 12,562,332 km (0.106 R)
• M58: 12,720,756 km (0.086 R)
• M59: 13,039,698 km (0.115 R)
• M60: 13,180,021 km (0.081 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.39 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 960.2

Radius: 11

Gravity: 7.94 G

Time & Orbit

Eccentricity (e): 0.114

Orbit Range: 2.12 AU - 2.66 AU

Year: 2424 Days

Day: 9.7 Hours

Environment

Temp: -187 °C

Axial Tilt: 2.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 48,452,748 km

• M1: 146,456 km (0.09 R)
• M2: 261,048 km (0.108 R)
• M3: 389,553 km (0.083 R)
• M4: 579,393 km (0.087 R)
• M5: 696,228 km (0.072 R)
• M6: 791,971 km (0.116 R)
• M7: 1,063,342 km (0.114 R)
• M8: 1,164,470 km (0.116 R)
• M9: 1,400,984 km (0.118 R)
• M10: 1,500,167 km (0.049 R)
• M11: 1,588,879 km (0.058 R)
• M12: 1,732,194 km (0.056 R)
• M13: 1,934,450 km (0.053 R)
• M14: 2,216,592 km (0.102 R)
• M15: 2,407,179 km (0.1 R)
• M16: 2,680,046 km (0.114 R)
• M17: 2,883,349 km (0.087 R)
• M18: 3,059,576 km (0.079 R)
• M19: 3,372,235 km (0.102 R)
• M20: 3,609,348 km (0.107 R)
• M21: 3,695,367 km (0.105 R)
• M22: 3,816,990 km (0.069 R)
• M23: 4,010,719 km (0.071 R)
• M24: 4,082,077 km (0.069 R)
• M25: 4,262,193 km (0.083 R)
• M26: 4,408,200 km (0.098 R)
• M27: 4,500,353 km (0.085 R)
• M28: 4,649,053 km (0.101 R)
• M29: 4,724,151 km (0.116 R)
• M30: 4,875,395 km (0.092 R)
• M31: 5,260,460 km (0.098 R)
• M32: 5,338,699 km (0.107 R)
• M33: 5,476,479 km (0.08 R)
• M34: 5,937,839 km (0.036 R)
• M35: 6,307,495 km (0.068 R)
• M36: 6,706,024 km (0.106 R)
• M37: 7,177,706 km (0.106 R)
• M38: 7,549,606 km (0.11 R)
• M39: 8,040,287 km (0.057 R)
• M40: 8,198,562 km (0.098 R)
• M41: 8,289,368 km (0.067 R)
• M42: 8,518,252 km (0.084 R)
• M43: 8,888,657 km (0.111 R)
• M44: 9,549,580 km (0.065 R)
• M45: 9,669,258 km (0.065 R)
• M46: 9,765,450 km (0.072 R)
• M47: 9,910,261 km (0.1 R)
• M48: 10,324,347 km (0.088 R)
• M49: 10,918,700 km (0.107 R)
• M50: 11,524,122 km (0.075 R)
• M51: 11,600,567 km (0.117 R)
• M52: 11,907,991 km (0.103 R)
• M53: 12,036,944 km (0.102 R)
• M54: 12,374,437 km (0.112 R)
• M55: 12,583,574 km (0.107 R)
• M56: 12,899,525 km (0.079 R)
• M57: 13,351,760 km (0.072 R)
• M58: 13,593,211 km (0.038 R)
• M59: 14,162,281 km (0.119 R)
• M60: 15,044,459 km (0.098 R)
• M61: 15,351,883 km (0.095 R)
• M62: 15,576,729 km (0.036 R)
• M63: 15,774,347 km (0.083 R)
• M64: 16,001,287 km (0.101 R)
• M65: 16,200,701 km (0.114 R)
• M66: 16,343,567 km (0.102 R)
• M67: 17,737,371 km (0.104 R)
• M68: 18,747,456 km (0.109 R)
• M69: 18,897,502 km (0.076 R)
• M70: 19,078,216 km (0.089 R)
• M71: 19,745,573 km (0.104 R)
• M72: 19,837,276 km (0.05 R)
• M73: 20,051,500 km (0.081 R)
• M74: 20,482,492 km (0.112 R)
• M75: 20,730,076 km (0.108 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.92 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 899.2

Radius: 13.2

Gravity: 5.16 G

Time & Orbit

Eccentricity (e): 0.161

Orbit Range: 2.45 AU - 3.39 AU

Year: 3273 Days

Day: 9.3 Hours

Environment

Temp: -200 °C

Axial Tilt: 24.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 48,452,748 km

• M1: 239,506 km (0.087 R)
• M2: 369,806 km (0.065 R)
• M3: 546,481 km (0.09 R)
• M4: 662,719 km (0.119 R)
• M5: 766,988 km (0.089 R)
• M6: 855,251 km (0.065 R)
• M7: 1,042,996 km (0.082 R)
• M8: 1,365,230 km (0.076 R)
• M9: 1,447,509 km (0.117 R)
• M10: 1,574,069 km (0.1 R)
• M11: 1,748,949 km (0.045 R)
• M12: 2,008,202 km (0.042 R)
• M13: 2,395,660 km (0.052 R)
• M14: 2,530,298 km (0.102 R)
• M15: 2,931,370 km (0.085 R)
• M16: 3,021,279 km (0.115 R)
• M17: 3,561,477 km (0.062 R)
• M18: 3,774,354 km (0.05 R)
• M19: 4,563,034 km (0.113 R)
• M20: 4,901,275 km (0.081 R)
• M21: 5,919,139 km (0.05 R)
• M22: 6,010,693 km (0.086 R)
• M23: 6,311,684 km (0.112 R)
• M24: 7,268,811 km (0.092 R)
• M25: 7,366,947 km (0.087 R)
• M26: 7,764,429 km (0.067 R)
• M27: 7,915,223 km (0.117 R)
• M28: 8,016,351 km (0.073 R)
• M29: 8,476,664 km (0.098 R)
• M30: 8,762,246 km (0.062 R)
• M31: 9,077,300 km (0.114 R)
• M32: 9,423,020 km (0.112 R)
• M33: 10,486,063 km (0.095 R)
• M34: 10,597,214 km (0.066 R)
• M35: 10,764,764 km (0.067 R)
• M36: 11,329,496 km (0.108 R)
• M37: 11,673,122 km (0.114 R)
• M38: 13,231,184 km (0.118 R)
• M39: 13,744,753 km (0.047 R)
• M40: 13,836,157 km (0.064 R)
• M41: 14,573,974 km (0.119 R)
• M42: 15,324,507 km (0.108 R)
• M43: 15,672,771 km (0.12 R)
• M44: 15,863,957 km (0.095 R)
• M45: 16,087,755 km (0.073 R)
• M46: 16,571,106 km (0.065 R)
• M47: 16,668,344 km (0.065 R)
• M48: 16,928,645 km (0.11 R)
• M49: 17,059,244 km (0.111 R)
• M50: 17,190,291 km (0.101 R)
• M51: 17,288,727 km (0.073 R)
• M52: 17,618,141 km (0.093 R)
• M53: 17,816,957 km (0.113 R)
• M54: 17,916,589 km (0.108 R)
• M55: 18,383,933 km (0.049 R)
• M56: 18,551,931 km (0.098 R)
• M57: 18,686,569 km (0.101 R)
• M58: 18,821,656 km (0.084 R)
• M59: 18,923,233 km (0.068 R)
• M60: 19,296,929 km (0.074 R)
• M61: 19,433,362 km (0.089 R)
• M62: 19,948,128 km (0.103 R)
• M63: 20,432,676 km (0.103 R)
• M64: 20,815,945 km (0.069 R)
• M65: 21,201,758 km (0.106 R)
• M66: 21,483,900 km (0.039 R)
• M67: 21,696,179 km (0.057 R)
• M68: 22,912,859 km (0.07 R)
• M69: 23,129,776 km (0.12 R)
• M70: 23,748,363 km (0.059 R)
• M71: 23,931,321 km (0.039 R)
• M72: 24,483,038 km (0.068 R)
• M73: 24,927,493 km (0.034 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.31 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 167.8

Radius: 12.9

Gravity: 1.01 G

Time & Orbit

Eccentricity (e): 0.128

Orbit Range: 2.89 AU - 3.73 AU

Year: 3950 Days

Day: 10.8 Hours

Environment

Temp: -209 °C

Axial Tilt: 45.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 48,452,748 km

• M1: 198,965 km (0.086 R)
• M2: 339,138 km (0.06 R)
• M3: 469,289 km (0.082 R)
• M4: 1,024,895 km (0.116 R)
• M5: 1,401,732 km (0.107 R)
• M6: 1,666,071 km (0.066 R)
• M7: 1,798,914 km (0.047 R)
• M8: 2,122,943 km (0.064 R)
• M9: 2,328,940 km (0.104 R)
• M10: 2,465,971 km (0.077 R)
• M11: 2,761,128 km (0.069 R)
• M12: 2,959,943 km (0.116 R)
• M13: 3,040,876 km (0.115 R)
• M14: 3,685,792 km (0.107 R)
• M15: 3,802,329 km (0.09 R)
• M16: 3,994,413 km (0.108 R)
• M17: 4,114,241 km (0.036 R)
• M18: 4,296,152 km (0.111 R)
• M19: 4,699,767 km (0.046 R)
• M20: 4,858,340 km (0.039 R)
• M21: 5,361,139 km (0.089 R)
• M22: 5,476,928 km (0.032 R)
• M23: 5,677,538 km (0.1 R)
• M24: 5,931,705 km (0.078 R)
• M25: 6,363,893 km (0.042 R)
• M26: 6,522,018 km (0.048 R)
• M27: 6,699,142 km (0.026 R)
• M28: 7,276,889 km (0.115 R)
• M29: 7,405,543 km (0.081 R)
• M30: 7,608,996 km (0.112 R)
• M31: 7,833,244 km (0.093 R)
• M32: 7,965,039 km (0.115 R)
• M33: 8,078,584 km (0.082 R)
• M34: 8,480,404 km (0.114 R)
• M35: 8,596,342 km (0.084 R)
• M36: 8,888,657 km (0.078 R)
• M37: 9,026,287 km (0.027 R)
• M38: 9,125,021 km (0.107 R)
• M39: 9,263,699 km (0.077 R)
• M40: 9,543,447 km (0.101 R)
• M41: 9,623,930 km (0.094 R)
• M42: 9,704,563 km (0.047 R)
• M43: 9,805,692 km (0.068 R)
• M44: 9,947,810 km (0.089 R)
• M45: 10,029,340 km (0.082 R)
• M46: 10,152,160 km (0.027 R)
• M47: 10,836,271 km (0.064 R)
• M48: 11,088,793 km (0.076 R)
• M49: 11,194,708 km (0.059 R)
• M50: 11,343,259 km (0.119 R)
• M51: 11,966,334 km (0.106 R)
• M52: 12,249,223 km (0.079 R)
• M53: 12,468,384 km (0.108 R)
• M54: 13,901,382 km (0.091 R)
• M55: 14,198,932 km (0.081 R)
• M56: 14,290,785 km (0.088 R)
• M57: 14,730,304 km (0.108 R)
• M58: 15,197,797 km (0.081 R)
• M59: 15,386,141 km (0.11 R)
• M60: 15,504,323 km (0.082 R)
• M61: 15,717,650 km (0.081 R)
• M62: 15,955,959 km (0.104 R)
• M63: 16,075,488 km (0.092 R)

Planet 7 - Ice Giant

Semi-Major Axis: 6.93 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 494

Radius: 7.7

Gravity: 8.33 G

Time & Orbit

Eccentricity (e): 0.22

Orbit Range: 5.41 AU - 8.45 AU

Year: 11968 Days

Day: 19.8 Hours

Environment

Temp: -228 °C

Axial Tilt: 51.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 48,452,748 km

• M1: 100,081 km (0.117 R)
• M2: 347,067 km (0.117 R)
• M3: 398,978 km (0.112 R)
• M4: 753,824 km (0.091 R)
• M5: 824,284 km (0.088 R)
• M6: 2,080,906 km (0.04 R)
• M7: 2,362,300 km (0.076 R)
• M8: 2,467,766 km (0.057 R)
• M9: 2,961,439 km (0.099 R)
• M10: 3,104,006 km (0.108 R)
• M11: 3,277,989 km (0.063 R)
• M12: 3,455,412 km (0.112 R)
• M13: 3,881,317 km (0.114 R)
• M14: 3,974,815 km (0.051 R)
• M15: 4,584,128 km (0.083 R)
• M16: 4,749,284 km (0.084 R)
• M17: 5,085,729 km (0.115 R)
• M18: 5,852,568 km (0.104 R)
• M19: 6,213,099 km (0.074 R)
• M20: 7,337,327 km (0.086 R)
• M21: 8,281,140 km (0.113 R)
• M22: 9,096,598 km (0.114 R)
• M23: 9,937,487 km (0.099 R)
• M24: 10,023,057 km (0.107 R)
• M25: 11,023,269 km (0.062 R)
• M26: 12,009,567 km (0.085 R)
• M27: 12,146,150 km (0.1 R)
• M28: 12,421,111 km (0.083 R)
• M29: 13,023,691 km (0.082 R)
• M30: 13,305,085 km (0.117 R)
• M31: 13,635,996 km (0.119 R)
• M32: 13,730,990 km (0.04 R)
• M33: 13,873,856 km (0.057 R)
• M34: 14,161,234 km (0.082 R)
• M35: 14,595,965 km (0.097 R)
• M36: 15,726,925 km (0.074 R)
• M37: 16,126,800 km (0.086 R)
• M38: 16,732,971 km (0.105 R)
• M39: 16,987,736 km (0.09 R)
• M40: 17,192,535 km (0.112 R)
• M41: 17,863,631 km (0.106 R)
• M42: 17,915,542 km (0.082 R)
• M43: 18,228,501 km (0.094 R)
• M44: 18,859,804 km (0.104 R)
• M45: 19,337,918 km (0.096 R)
• M46: 19,873,928 km (0.118 R)
• M47: 19,981,788 km (0.105 R)
• M48: 20,741,595 km (0.107 R)
• M49: 20,905,704 km (0.092 R)
• M50: 20,960,457 km (0.088 R)
• M51: 21,400,574 km (0.051 R)
• M52: 22,177,884 km (0.084 R)
• M53: 22,457,782 km (0.084 R)
• M54: 22,513,881 km (0.09 R)
• M55: 23,931,919 km (0.073 R)
• M56: 24,103,957 km (0.067 R)
• M57: 24,391,783 km (0.087 R)
• M58: 25,671,294 km (0.092 R)
• M59: 26,734,486 km (0.114 R)
• M60: 27,151,714 km (0.076 R)
• M61: 28,234,803 km (0.116 R)
• M62: 28,659,661 km (0.069 R)
• M63: 28,720,547 km (0.082 R)
• M64: 30,194,685 km (0.11 R)
• M65: 31,316,220 km (0.109 R)
• M66: 31,379,051 km (0.086 R)
• M67: 31,882,149 km (0.103 R)
• M68: 32,134,819 km (0.078 R)
• M69: 32,578,527 km (0.079 R)
• M70: 33,343,720 km (0.1 R)
• M71: 33,407,748 km (0.045 R)
• M72: 33,985,943 km (0.049 R)
• M73: 35,413,257 km (0.086 R)
• M74: 35,871,475 km (0.086 R)
• M75: 35,937,148 km (0.098 R)
• M76: 36,397,611 km (0.109 R)
• M77: 36,595,678 km (0.1 R)
• M78: 36,926,290 km (0.116 R)
• M79: 38,058,147 km (0.112 R)
• M80: 38,863,881 km (0.091 R)
• M81: 39,404,229 km (0.115 R)
• M82: 39,471,997 km (0.096 R)
• M83: 40,015,037 km (0.051 R)
• M84: 40,151,321 km (0.057 R)
• M85: 41,866,310 km (0.051 R)
• M86: 42,073,653 km (0.09 R)
• M87: 43,955,744 km (0.119 R)
• M88: 44,659,752 km (0.117 R)
• M89: 45,722,794 km (0.03 R)
• M90: 47,081,143 km (0.052 R)
• M91: 47,440,776 km (0.05 R)

Kuiper Belt

Range: 30 - 51 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 171 - 20,129 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit