🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 1.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 361.8

Radius: 14.3

Gravity: 1.77 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 1.05 AU - 1.23 AU

Year: 786 Days

Day: 12.9 Hours

Environment

Temp: -171 °C

Axial Tilt: 16.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (43)

Outer Limit: 60,118,349 km

• M1: 210,335 km (0.119 R)
• M2: 308,920 km (0.104 R)
• M3: 417,079 km (0.041 R)
• M4: 525,537 km (0.029 R)
• M5: 747,391 km (0.115 R)
• M6: 897,886 km (0.095 R)
• M7: 1,049,429 km (0.097 R)
• M8: 1,155,644 km (0.108 R)
• M9: 1,249,142 km (0.106 R)
• M10: 1,409,062 km (0.102 R)
• M11: 1,539,811 km (0.105 R)
• M12: 1,662,481 km (0.09 R)
• M13: 1,820,756 km (0.114 R)
• M14: 1,918,144 km (0.031 R)
• M15: 2,044,255 km (0.116 R)
• M16: 2,173,208 km (0.073 R)
• M17: 2,312,185 km (0.12 R)
• M18: 2,425,430 km (0.115 R)
• M19: 2,526,110 km (0.031 R)
• M20: 2,829,494 km (0.1 R)
• M21: 2,935,858 km (0.111 R)
• M22: 3,066,906 km (0.077 R)
• M23: 3,168,483 km (0.118 R)
• M24: 3,287,114 km (0.032 R)
• M25: 3,415,319 km (0.107 R)
• M26: 3,768,221 km (0.085 R)
• M27: 3,979,004 km (0.095 R)
• M28: 4,116,036 km (0.098 R)
• M29: 4,359,581 km (0.106 R)
• M30: 4,527,580 km (0.1 R)
• M31: 4,679,721 km (0.1 R)
• M32: 4,770,078 km (0.104 R)
• M33: 4,980,113 km (0.082 R)
• M34: 5,324,487 km (0.112 R)
• M35: 5,447,307 km (0.095 R)
• M36: 5,686,365 km (0.066 R)
• M37: 5,802,303 km (0.071 R)
• M38: 5,948,460 km (0.099 R)
• M39: 6,354,020 km (0.114 R)
• M40: 6,585,597 km (0.097 R)
• M41: 6,758,533 km (0.104 R)
• M42: 6,861,007 km (0.056 R)
• M43: 6,963,930 km (0.074 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.19 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 617.3

Radius: 14.9

Gravity: 2.78 G

Time & Orbit

Eccentricity (e): 0.217

Orbit Range: 0.93 AU - 1.45 AU

Year: 838 Days

Day: 9.3 Hours

Environment

Temp: -165 °C

Axial Tilt: 27.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (48)

Outer Limit: 60,118,349 km

• M1: 188,344 km (0.056 R)
• M2: 322,533 km (0.112 R)
• M3: 459,864 km (0.079 R)
• M4: 644,916 km (0.086 R)
• M5: 788,530 km (0.11 R)
• M6: 892,950 km (0.111 R)
• M7: 1,020,856 km (0.088 R)
• M8: 1,136,794 km (0.115 R)
• M9: 1,283,550 km (0.08 R)
• M10: 1,597,705 km (0.106 R)
• M11: 1,720,226 km (0.096 R)
• M12: 1,846,187 km (0.107 R)
• M13: 2,052,782 km (0.093 R)
• M14: 2,235,142 km (0.092 R)
• M15: 2,357,064 km (0.105 R)
• M16: 2,556,927 km (0.106 R)
• M17: 2,667,629 km (0.092 R)
• M18: 2,779,977 km (0.115 R)
• M19: 2,973,856 km (0.113 R)
• M20: 3,163,247 km (0.118 R)
• M21: 3,328,852 km (0.085 R)
• M22: 3,450,325 km (0.082 R)
• M23: 3,563,720 km (0.117 R)
• M24: 3,823,572 km (0.053 R)
• M25: 3,960,903 km (0.064 R)
• M26: 4,180,064 km (0.096 R)
• M27: 4,291,215 km (0.087 R)
• M28: 4,568,121 km (0.081 R)
• M29: 4,872,253 km (0.119 R)
• M30: 4,989,388 km (0.075 R)
• M31: 5,467,353 km (0.04 R)
• M32: 5,678,436 km (0.086 R)
• M33: 5,779,415 km (0.12 R)
• M34: 5,983,017 km (0.115 R)
• M35: 6,166,125 km (0.052 R)
• M36: 6,374,365 km (0.086 R)
• M37: 6,526,207 km (0.056 R)
• M38: 6,845,449 km (0.094 R)
• M39: 6,977,095 km (0.04 R)
• M40: 7,097,372 km (0.118 R)
• M41: 7,279,283 km (0.066 R)
• M42: 7,474,957 km (0.061 R)
• M43: 7,759,342 km (0.082 R)
• M44: 7,909,090 km (0.11 R)
• M45: 8,047,318 km (0.028 R)
• M46: 8,199,010 km (0.027 R)
• M47: 8,364,466 km (0.113 R)
• M48: 8,530,968 km (0.12 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 186.9

Radius: 10.7

Gravity: 1.63 G

Time & Orbit

Eccentricity (e): 0.008

Orbit Range: 2.09 AU - 2.13 AU

Year: 1979 Days

Day: 10.5 Hours

Environment

Temp: -194 °C

Axial Tilt: 17.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 60,118,349 km

• M1: 133,441 km (0.079 R)
• M2: 204,201 km (0.105 R)
• M3: 391,348 km (0.059 R)
• M4: 467,643 km (0.098 R)
• M5: 560,992 km (0.092 R)
• M6: 838,047 km (0.118 R)
• M7: 942,467 km (0.057 R)
• M8: 1,079,498 km (0.059 R)
• M9: 1,290,431 km (0.118 R)
• M10: 1,374,056 km (0.09 R)
• M11: 1,571,226 km (0.053 R)
• M12: 1,727,556 km (0.095 R)
• M13: 1,949,859 km (0.064 R)
• M14: 2,055,624 km (0.102 R)
• M15: 2,127,282 km (0.06 R)
• M16: 2,245,464 km (0.073 R)
• M17: 2,347,340 km (0.031 R)
• M18: 2,479,286 km (0.059 R)
• M19: 2,555,730 km (0.11 R)
• M20: 2,790,150 km (0.113 R)
• M21: 3,103,258 km (0.092 R)
• M22: 3,353,685 km (0.102 R)
• M23: 3,697,760 km (0.102 R)
• M24: 3,863,066 km (0.073 R)
• M25: 3,996,956 km (0.032 R)
• M26: 4,281,192 km (0.051 R)
• M27: 4,373,494 km (0.119 R)
• M28: 4,478,212 km (0.1 R)
• M29: 4,619,133 km (0.112 R)
• M30: 4,713,979 km (0.048 R)
• M31: 4,941,666 km (0.074 R)
• M32: 5,026,488 km (0.06 R)
• M33: 5,283,946 km (0.108 R)
• M34: 5,383,130 km (0.114 R)
• M35: 5,697,136 km (0.105 R)
• M36: 5,901,337 km (0.073 R)
• M37: 6,030,141 km (0.102 R)
• M38: 6,120,946 km (0.087 R)
• M39: 6,435,551 km (0.108 R)
• M40: 6,701,835 km (0.115 R)
• M41: 6,849,937 km (0.077 R)
• M42: 7,039,926 km (0.066 R)
• M43: 7,190,422 km (0.119 R)
• M44: 7,272,850 km (0.098 R)
• M45: 7,508,467 km (0.092 R)
• M46: 7,634,279 km (0.112 R)
• M47: 8,029,965 km (0.042 R)
• M48: 8,158,619 km (0.096 R)
• M49: 8,534,110 km (0.097 R)
• M50: 8,606,964 km (0.066 R)
• M51: 8,841,533 km (0.044 R)
• M52: 9,078,197 km (0.115 R)
• M53: 9,182,467 km (0.12 R)
• M54: 9,437,232 km (0.108 R)
• M55: 9,679,132 km (0.106 R)
• M56: 10,045,946 km (0.1 R)
• M57: 10,215,440 km (0.029 R)
• M58: 10,510,746 km (0.065 R)

Asteroid Belt

Center: 3.05 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 4 - Gas Giant

Semi-Major Axis: 3.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 28.1

Radius: 13.6

Gravity: 0.15 G

Time & Orbit

Eccentricity (e): 0.24

Orbit Range: 3.02 AU - 4.94 AU

Year: 5127 Days

Day: 14.6 Hours

Environment

Temp: -208 °C

Axial Tilt: 0.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (34)

Outer Limit: 60,118,349 km

• M1: 186,399 km (0.105 R)
• M2: 299,944 km (0.112 R)
• M3: 404,961 km (0.116 R)
• M4: 498,610 km (0.113 R)
• M5: 613,202 km (0.095 R)
• M6: 756,367 km (0.074 R)
• M7: 880,234 km (0.056 R)
• M8: 1,087,128 km (0.105 R)
• M9: 1,318,556 km (0.117 R)
• M10: 1,409,661 km (0.106 R)
• M11: 1,534,725 km (0.034 R)
• M12: 1,864,289 km (0.041 R)
• M13: 2,317,570 km (0.1 R)
• M14: 2,457,444 km (0.101 R)
• M15: 2,874,673 km (0.054 R)
• M16: 3,107,297 km (0.119 R)
• M17: 3,283,224 km (0.092 R)
• M18: 3,473,214 km (0.114 R)
• M19: 3,721,397 km (0.115 R)
• M20: 3,842,122 km (0.102 R)
• M21: 4,258,154 km (0.036 R)
• M22: 4,927,455 km (0.09 R)
• M23: 5,145,718 km (0.113 R)
• M24: 5,317,756 km (0.063 R)
• M25: 5,832,671 km (0.08 R)
• M26: 5,986,308 km (0.059 R)
• M27: 6,350,430 km (0.108 R)
• M28: 7,458,052 km (0.064 R)
• M29: 8,076,939 km (0.115 R)
• M30: 8,205,593 km (0.069 R)
• M31: 8,977,219 km (0.109 R)
• M32: 9,379,188 km (0.072 R)
• M33: 9,605,081 km (0.088 R)
• M34: 10,448,962 km (0.118 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 374.8

Radius: 13.1

Gravity: 2.18 G

Time & Orbit

Eccentricity (e): 0.229

Orbit Range: 3.59 AU - 5.71 AU

Year: 6474 Days

Day: 8.9 Hours

Environment

Temp: -208 °C

Axial Tilt: 27.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (62)

Outer Limit: 60,118,349 km

• M1: 183,856 km (0.075 R)
• M2: 432,188 km (0.05 R)
• M3: 528,978 km (0.104 R)
• M4: 738,415 km (0.093 R)
• M5: 885,919 km (0.049 R)
• M6: 1,071,719 km (0.082 R)
• M7: 1,345,633 km (0.087 R)
• M8: 1,562,251 km (0.056 R)
• M9: 1,658,741 km (0.101 R)
• M10: 2,136,258 km (0.113 R)
• M11: 2,890,979 km (0.08 R)
• M12: 3,092,038 km (0.1 R)
• M13: 4,649,053 km (0.107 R)
• M14: 4,933,289 km (0.069 R)
• M15: 6,101,200 km (0.097 R)
• M16: 6,756,289 km (0.092 R)
• M17: 7,024,667 km (0.108 R)
• M18: 7,822,772 km (0.069 R)
• M19: 8,418,770 km (0.08 R)
• M20: 8,853,501 km (0.117 R)
• M21: 9,265,943 km (0.08 R)
• M22: 9,444,562 km (0.088 R)
• M23: 9,684,667 km (0.102 R)
• M24: 9,957,085 km (0.073 R)
• M25: 11,198,597 km (0.093 R)
• M26: 11,357,321 km (0.044 R)
• M27: 11,773,203 km (0.062 R)
• M28: 12,031,708 km (0.106 R)
• M29: 12,653,138 km (0.117 R)
• M30: 13,151,149 km (0.077 R)
• M31: 13,285,039 km (0.101 R)
• M32: 13,587,975 km (0.114 R)
• M33: 13,961,371 km (0.119 R)
• M34: 14,510,545 km (0.1 R)
• M35: 15,066,750 km (0.067 R)
• M36: 15,277,234 km (0.083 R)
• M37: 15,559,226 km (0.064 R)
• M38: 15,700,895 km (0.117 R)
• M39: 15,985,580 km (0.105 R)
• M40: 16,128,595 km (0.033 R)
• M41: 16,343,867 km (0.105 R)
• M42: 16,813,604 km (0.081 R)
• M43: 17,104,871 km (0.113 R)
• M44: 17,360,982 km (0.108 R)
• M45: 19,000,725 km (0.089 R)
• M46: 19,152,118 km (0.067 R)
• M47: 19,992,708 km (0.108 R)
• M48: 20,378,671 km (0.115 R)
• M49: 21,551,518 km (0.036 R)
• M50: 22,106,377 km (0.113 R)
• M51: 23,880,757 km (0.074 R)
• M52: 24,537,342 km (0.057 R)
• M53: 24,702,348 km (0.087 R)
• M54: 25,033,558 km (0.119 R)
• M55: 25,868,165 km (0.069 R)
• M56: 26,246,647 km (0.107 R)
• M57: 26,924,176 km (0.083 R)
• M58: 27,009,297 km (0.081 R)
• M59: 27,822,062 km (0.066 R)
• M60: 28,816,739 km (0.037 R)
• M61: 28,947,338 km (0.079 R)
• M62: 29,209,283 km (0.1 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.51 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 562.1

Radius: 3.7

Gravity: 41.06 G

Time & Orbit

Eccentricity (e): 0.058

Orbit Range: 7.07 AU - 7.95 AU

Year: 13288 Days

Day: 17.7 Hours

Environment

Temp: -224 °C

Axial Tilt: 44.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 60,118,349 km

• M1: 126,410 km (0.076 R)
• M2: 187,895 km (0.105 R)
• M3: 273,166 km (0.052 R)
• M4: 495,917 km (0.106 R)
• M5: 764,146 km (0.098 R)
• M6: 1,295,368 km (0.114 R)
• M7: 1,558,361 km (0.12 R)
• M8: 1,683,275 km (0.098 R)
• M9: 2,023,162 km (0.12 R)
• M10: 2,077,316 km (0.107 R)
• M11: 2,159,445 km (0.039 R)
• M12: 3,514,503 km (0.114 R)
• M13: 3,744,584 km (0.065 R)
• M14: 4,463,701 km (0.064 R)
• M15: 4,856,994 km (0.097 R)
• M16: 5,907,321 km (0.025 R)
• M17: 6,618,060 km (0.1 R)
• M18: 6,820,317 km (0.032 R)
• M19: 7,024,518 km (0.091 R)
• M20: 7,065,657 km (0.108 R)
• M21: 7,776,397 km (0.085 R)
• M22: 8,204,994 km (0.108 R)
• M23: 8,465,893 km (0.091 R)
• M24: 8,553,408 km (0.05 R)
• M25: 8,641,222 km (0.117 R)
• M26: 9,040,349 km (0.058 R)
• M27: 9,085,079 km (0.08 R)
• M28: 9,264,596 km (0.026 R)
• M29: 9,399,982 km (0.048 R)
• M30: 9,627,221 km (0.041 R)
• M31: 9,718,626 km (0.12 R)
• M32: 10,087,085 km (0.066 R)
• M33: 11,075,927 km (0.103 R)
• M34: 11,364,053 km (0.085 R)
• M35: 12,045,920 km (0.041 R)
• M36: 12,292,607 km (0.109 R)
• M37: 12,891,597 km (0.108 R)
• M38: 12,992,425 km (0.094 R)
• M39: 13,296,109 km (0.033 R)
• M40: 14,221,671 km (0.111 R)
• M41: 15,061,514 km (0.076 R)
• M42: 15,701,942 km (0.042 R)
• M43: 16,187,986 km (0.117 R)
• M44: 16,569,610 km (0.041 R)
• M45: 16,843,823 km (0.102 R)
• M46: 17,619,936 km (0.069 R)
• M47: 17,731,836 km (0.107 R)
• M48: 19,149,275 km (0.117 R)
• M49: 19,494,847 km (0.097 R)
• M50: 19,958,750 km (0.097 R)
• M51: 22,635,504 km (0.055 R)
• M52: 23,922,644 km (0.047 R)
• M53: 24,294,844 km (0.09 R)
• M54: 24,419,309 km (0.088 R)
• M55: 25,170,440 km (0.119 R)
• M56: 25,422,513 km (0.095 R)
• M57: 25,865,621 km (0.054 R)
• M58: 25,992,780 km (0.085 R)
• M59: 26,120,087 km (0.112 R)
• M60: 26,247,545 km (0.101 R)
• M61: 27,728,713 km (0.079 R)
• M62: 29,435,326 km (0.033 R)
• M63: 29,767,284 km (0.06 R)
• M64: 30,167,458 km (0.065 R)
• M65: 30,368,218 km (0.103 R)
• M66: 30,771,085 km (0.074 R)
• M67: 31,785,658 km (0.106 R)
• M68: 32,263,025 km (0.05 R)
• M69: 33,086,711 km (0.104 R)
• M70: 33,570,361 km (0.103 R)
• M71: 37,307,615 km (0.09 R)
• M72: 38,969,946 km (0.05 R)
• M73: 39,627,130 km (0.069 R)
• M74: 40,508,859 km (0.047 R)
• M75: 40,878,067 km (0.07 R)
• M76: 41,918,071 km (0.109 R)
• M77: 42,067,370 km (0.088 R)
• M78: 43,117,248 km (0.107 R)
• M79: 43,418,688 km (0.032 R)
• M80: 43,569,781 km (0.093 R)
• M81: 43,721,025 km (0.07 R)
• M82: 43,796,721 km (0.051 R)
• M83: 44,175,653 km (0.116 R)
• M84: 44,327,644 km (0.117 R)
• M85: 44,555,781 km (0.083 R)
• M86: 48,337,765 km (0.086 R)
• M87: 49,989,774 km (0.119 R)
• M88: 50,862,528 km (0.076 R)
• M89: 51,740,219 km (0.111 R)
• M90: 51,900,288 km (0.111 R)
• M91: 52,221,026 km (0.068 R)
• M92: 52,542,512 km (0.084 R)
• M93: 53,106,496 km (0.119 R)
• M94: 53,268,062 km (0.061 R)
• M95: 53,348,845 km (0.104 R)
• M96: 53,915,821 km (0.07 R)

Planet 7 - Ice Giant

Semi-Major Axis: 10.85 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 253.8

Radius: 7.7

Gravity: 4.28 G

Time & Orbit

Eccentricity (e): 0.148

Orbit Range: 9.24 AU - 12.46 AU

Year: 23076 Days

Day: 20.5 Hours

Environment

Temp: -236 °C

Axial Tilt: 117 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 60,118,349 km

• M1: 116,986 km (0.119 R)
• M2: 174,730 km (0.107 R)
• M3: 488,736 km (0.069 R)
• M4: 612,454 km (0.075 R)
• M5: 727,046 km (0.103 R)
• M6: 1,636,002 km (0.112 R)
• M7: 2,022,414 km (0.116 R)
• M8: 2,812,290 km (0.114 R)
• M9: 2,974,305 km (0.098 R)
• M10: 3,039,978 km (0.079 R)
• M11: 3,937,266 km (0.107 R)
• M12: 4,082,227 km (0.086 R)
• M13: 4,228,833 km (0.053 R)
• M14: 4,377,383 km (0.057 R)
• M15: 4,489,881 km (0.091 R)
• M16: 6,205,170 km (0.076 R)
• M17: 6,630,327 km (0.059 R)
• M18: 7,870,344 km (0.081 R)
• M19: 8,469,932 km (0.11 R)
• M20: 8,941,166 km (0.093 R)
• M21: 9,518,015 km (0.094 R)
• M22: 11,838,278 km (0.105 R)
• M23: 12,417,820 km (0.069 R)
• M24: 12,524,184 km (0.069 R)
• M25: 12,577,441 km (0.117 R)
• M26: 12,845,221 km (0.11 R)
• M27: 13,549,827 km (0.115 R)
• M28: 13,604,580 km (0.118 R)
• M29: 15,394,369 km (0.039 R)
• M30: 15,623,403 km (0.086 R)
• M31: 16,200,552 km (0.117 R)
• M32: 16,433,326 km (0.119 R)
• M33: 16,608,804 km (0.056 R)
• M34: 18,517,524 km (0.05 R)
• M35: 19,251,152 km (0.102 R)
• M36: 19,312,636 km (0.096 R)
• M37: 19,745,423 km (0.107 R)
• M38: 19,994,204 km (0.071 R)
• M39: 22,279,012 km (0.069 R)
• M40: 23,255,288 km (0.111 R)
• M41: 23,649,628 km (0.094 R)
• M42: 23,913,818 km (0.11 R)
• M43: 25,316,597 km (0.08 R)
• M44: 26,334,760 km (0.108 R)
• M45: 27,366,387 km (0.032 R)
• M46: 27,435,651 km (0.096 R)
• M47: 28,131,281 km (0.085 R)
• M48: 28,341,167 km (0.099 R)
• M49: 29,185,647 km (0.057 R)
• M50: 33,013,258 km (0.077 R)
• M51: 33,456,367 km (0.113 R)
• M52: 33,530,418 km (0.084 R)
• M53: 33,975,920 km (0.063 R)
• M54: 34,572,966 km (0.117 R)
• M55: 34,647,764 km (0.097 R)
• M56: 36,004,617 km (0.101 R)
• M57: 38,381,877 km (0.095 R)
• M58: 39,942,332 km (0.053 R)
• M59: 40,888,539 km (0.093 R)
• M60: 40,967,826 km (0.116 R)
• M61: 42,481,906 km (0.083 R)
• M62: 43,205,660 km (0.089 R)
• M63: 43,852,222 km (0.116 R)
• M64: 44,909,879 km (0.116 R)
• M65: 46,058,192 km (0.069 R)
• M66: 46,718,667 km (0.07 R)
• M67: 48,300,066 km (0.108 R)
• M68: 48,467,466 km (0.04 R)
• M69: 48,719,090 km (0.084 R)
• M70: 49,983,491 km (0.095 R)
• M71: 51,087,972 km (0.111 R)
• M72: 51,943,073 km (0.096 R)
• M73: 53,840,722 km (0.077 R)
• M74: 54,014,406 km (0.101 R)
• M75: 55,060,244 km (0.106 R)
• M76: 56,288,742 km (0.069 R)
• M77: 56,465,118 km (0.118 R)
• M78: 56,994,844 km (0.106 R)
• M79: 57,171,818 km (0.11 R)
• M80: 58,951,734 km (0.05 R)
• M81: 59,130,653 km (0.101 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 522 - 17,740 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit