🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.01 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.85

Radius: 1.28

Gravity: 1.13 G

Time & Orbit

Eccentricity (e): 0.237

Orbit Range: 0.77 AU - 1.25 AU

Year: 380 Days

Day: 27 Hours

Environment

Temp: 2 °C

Axial Tilt: 33.2 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 64,951,038 km

• M1: 124,914 km (0.058 R)

Planet 2 - Terrestrial

Semi-Major Axis: 2.81 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.43

Radius: 1.15

Gravity: 1.08 G

Time & Orbit

Eccentricity (e): 0.044

Orbit Range: 2.69 AU - 2.93 AU

Year: 1765 Days

Day: 26.1 Hours

Environment

Temp: -105 °C

Axial Tilt: 13.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 3.24 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.51

Radius: 1.83

Gravity: 1.35 G

Time & Orbit

Eccentricity (e): 0.15

Orbit Range: 2.75 AU - 3.73 AU

Year: 2185 Days

Day: 36.6 Hours

Environment

Temp: -108 °C

Axial Tilt: 34.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 64,951,038 km

• M1: 326,123 km (0.063 R)
• M2: 1,445,265 km (0.089 R)

Asteroid Belt

Center: 4.06 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 4 - Gas Giant

Semi-Major Axis: 4.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 196.6

Radius: 12.8

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.207

Orbit Range: 3.87 AU - 5.89 AU

Year: 4040 Days

Day: 5.9 Hours

Environment

Temp: -137 °C

Axial Tilt: 35.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (64)

Outer Limit: 64,951,038 km

• M1: 173,833 km (0.102 R)
• M2: 271,221 km (0.106 R)
• M3: 362,176 km (0.1 R)
• M4: 561,142 km (0.073 R)
• M5: 844,330 km (0.119 R)
• M6: 1,075,160 km (0.091 R)
• M7: 1,348,475 km (0.039 R)
• M8: 1,690,306 km (0.104 R)
• M9: 1,830,180 km (0.116 R)
• M10: 1,949,859 km (0.118 R)
• M11: 2,197,144 km (0.1 R)
• M12: 2,428,721 km (0.062 R)
• M13: 2,587,744 km (0.081 R)
• M14: 3,014,397 km (0.069 R)
• M15: 3,114,029 km (0.068 R)
• M16: 3,229,070 km (0.069 R)
• M17: 3,419,209 km (0.093 R)
• M18: 3,508,220 km (0.097 R)
• M19: 3,719,153 km (0.12 R)
• M20: 4,027,773 km (0.05 R)
• M21: 4,425,255 km (0.119 R)
• M22: 4,555,106 km (0.109 R)
• M23: 4,785,636 km (0.108 R)
• M24: 5,138,687 km (0.104 R)
• M25: 5,430,702 km (0.062 R)
• M26: 5,692,947 km (0.118 R)
• M27: 5,977,183 km (0.113 R)
• M28: 6,175,400 km (0.089 R)
• M29: 6,412,513 km (0.112 R)
• M30: 6,708,567 km (0.064 R)
• M31: 7,065,956 km (0.114 R)
• M32: 7,199,098 km (0.075 R)
• M33: 7,838,629 km (0.103 R)
• M34: 8,155,328 km (0.111 R)
• M35: 8,678,920 km (0.027 R)
• M36: 8,842,132 km (0.1 R)
• M37: 8,965,400 km (0.104 R)
• M38: 9,171,845 km (0.098 R)
• M39: 9,296,610 km (0.09 R)
• M40: 9,442,767 km (0.116 R)
• M41: 10,142,287 km (0.026 R)
• M42: 10,249,848 km (0.111 R)
• M43: 10,487,559 km (0.111 R)
• M44: 11,078,919 km (0.086 R)
• M45: 11,189,622 km (0.054 R)
• M46: 11,412,074 km (0.077 R)
• M47: 11,501,533 km (0.068 R)
• M48: 11,681,051 km (0.092 R)
• M49: 11,884,204 km (0.033 R)
• M50: 12,020,339 km (0.099 R)
• M51: 12,271,214 km (0.105 R)
• M52: 12,592,850 km (0.113 R)
• M53: 13,080,688 km (0.091 R)
• M54: 13,551,174 km (0.095 R)
• M55: 13,669,655 km (0.096 R)
• M56: 13,836,157 km (0.099 R)
• M57: 14,484,515 km (0.106 R)
• M58: 14,702,778 km (0.08 R)
• M59: 15,020,075 km (0.115 R)
• M60: 15,241,181 km (0.117 R)
• M61: 15,562,218 km (0.068 R)
• M62: 15,860,665 km (0.09 R)
• M63: 16,236,455 km (0.058 R)
• M64: 16,767,378 km (0.104 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.03 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 402.6

Radius: 8.3

Gravity: 5.84 G

Time & Orbit

Eccentricity (e): 0.204

Orbit Range: 4 AU - 6.06 AU

Year: 4227 Days

Day: 5.7 Hours

Environment

Temp: -147 °C

Axial Tilt: 48.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 64,951,038 km

• M1: 122,371 km (0.11 R)
• M2: 226,042 km (0.105 R)
• M3: 370,105 km (0.061 R)
• M4: 511,326 km (0.045 R)
• M5: 565,630 km (0.106 R)
• M6: 793,916 km (0.119 R)
• M7: 858,243 km (0.1 R)
• M8: 969,693 km (0.049 R)
• M9: 1,027,438 km (0.085 R)
• M10: 1,170,603 km (0.061 R)
• M11: 1,295,218 km (0.111 R)
• M12: 1,476,980 km (0.066 R)
• M13: 1,530,536 km (0.079 R)
• M14: 1,625,830 km (0.042 R)
• M15: 1,695,093 km (0.066 R)
• M16: 1,793,828 km (0.058 R)
• M17: 1,865,635 km (0.066 R)
• M18: 1,938,340 km (0.057 R)
• M19: 2,041,712 km (0.082 R)
• M20: 2,394,613 km (0.116 R)
• M21: 2,458,043 km (0.099 R)
• M22: 2,538,077 km (0.12 R)
• M23: 2,968,171 km (0.068 R)
• M24: 3,087,850 km (0.077 R)
• M25: 3,174,317 km (0.114 R)
• M26: 3,226,676 km (0.096 R)
• M27: 3,279,185 km (0.101 R)
• M28: 3,692,075 km (0.117 R)
• M29: 3,876,679 km (0.109 R)
• M30: 4,102,273 km (0.078 R)
• M31: 4,159,419 km (0.042 R)
• M32: 4,527,131 km (0.104 R)
• M33: 4,685,106 km (0.102 R)
• M34: 4,986,247 km (0.088 R)
• M35: 5,149,458 km (0.097 R)
• M36: 5,231,737 km (0.118 R)
• M37: 5,755,928 km (0.105 R)
• M38: 6,143,685 km (0.115 R)
• M39: 6,362,697 km (0.087 R)
• M40: 7,334,036 km (0.101 R)
• M41: 7,566,511 km (0.05 R)
• M42: 7,730,769 km (0.087 R)
• M43: 8,110,449 km (0.059 R)
• M44: 8,302,682 km (0.036 R)
• M45: 8,496,261 km (0.059 R)
• M46: 8,888,208 km (0.1 R)
• M47: 9,235,873 km (0.107 R)
• M48: 9,461,766 km (0.101 R)
• M49: 9,791,330 km (0.1 R)
• M50: 9,995,980 km (0.096 R)
• M51: 10,228,006 km (0.1 R)
• M52: 10,331,678 km (0.088 R)
• M53: 10,383,588 km (0.11 R)
• M54: 10,697,295 km (0.085 R)
• M55: 10,961,036 km (0.066 R)
• M56: 11,040,472 km (0.087 R)
• M57: 11,200,243 km (0.116 R)
• M58: 11,280,278 km (0.118 R)
• M59: 11,928,186 km (0.101 R)
• M60: 13,203,358 km (0.061 R)
• M61: 13,543,095 km (0.068 R)
• M62: 13,914,547 km (0.041 R)
• M63: 14,231,395 km (0.105 R)
• M64: 14,550,487 km (0.086 R)
• M65: 15,225,622 km (0.097 R)
• M66: 16,942,258 km (0.096 R)
• M67: 17,065,078 km (0.111 R)
• M68: 18,814,625 km (0.107 R)
• M69: 19,164,983 km (0.064 R)
• M70: 19,581,763 km (0.07 R)
• M71: 19,904,445 km (0.095 R)
• M72: 20,196,311 km (0.074 R)
• M73: 20,261,386 km (0.051 R)
• M74: 20,359,073 km (0.084 R)
• M75: 21,344,923 km (0.078 R)
• M76: 21,776,962 km (0.101 R)
• M77: 22,245,503 km (0.119 R)
• M78: 22,346,332 km (0.103 R)
• M79: 22,514,779 km (0.062 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 819.5

Radius: 9.9

Gravity: 8.36 G

Time & Orbit

Eccentricity (e): 0.077

Orbit Range: 6.29 AU - 7.33 AU

Year: 6660 Days

Day: 5.7 Hours

Environment

Temp: -157 °C

Axial Tilt: 26.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 64,951,038 km

• M1: 124,316 km (0.068 R)
• M2: 208,839 km (0.095 R)
• M3: 456,124 km (0.104 R)
• M4: 529,876 km (0.095 R)
• M5: 720,314 km (0.075 R)
• M6: 933,640 km (0.054 R)
• M7: 1,048,083 km (0.068 R)
• M8: 1,167,462 km (0.107 R)
• M9: 1,346,381 km (0.082 R)
• M10: 1,553,574 km (0.102 R)
• M11: 1,651,411 km (0.039 R)
• M12: 1,771,388 km (0.106 R)
• M13: 1,873,863 km (0.092 R)
• M14: 2,192,955 km (0.05 R)
• M15: 2,506,512 km (0.115 R)
• M16: 2,739,287 km (0.066 R)
• M17: 3,077,079 km (0.107 R)
• M18: 3,556,989 km (0.108 R)
• M19: 3,766,126 km (0.113 R)
• M20: 4,141,916 km (0.096 R)
• M21: 4,445,600 km (0.119 R)
• M22: 4,671,194 km (0.113 R)
• M23: 4,929,399 km (0.079 R)
• M24: 5,489,793 km (0.115 R)
• M25: 6,070,532 km (0.025 R)
• M26: 6,195,297 km (0.057 R)
• M27: 6,415,654 km (0.096 R)
• M28: 6,670,868 km (0.115 R)
• M29: 7,092,435 km (0.081 R)
• M30: 7,191,020 km (0.095 R)
• M31: 7,961,599 km (0.093 R)
• M32: 8,374,190 km (0.1 R)
• M33: 9,291,673 km (0.093 R)
• M34: 9,835,611 km (0.062 R)
• M35: 10,129,870 km (0.119 R)
• M36: 10,727,215 km (0.096 R)
• M37: 13,188,399 km (0.056 R)
• M38: 14,586,092 km (0.096 R)
• M39: 14,753,641 km (0.056 R)
• M40: 14,963,826 km (0.118 R)
• M41: 15,772,104 km (0.089 R)
• M42: 16,594,443 km (0.068 R)
• M43: 17,253,571 km (0.084 R)
• M44: 17,921,227 km (0.053 R)
• M45: 18,055,865 km (0.083 R)
• M46: 18,642,737 km (0.102 R)
• M47: 18,824,648 km (0.081 R)
• M48: 19,465,825 km (0.114 R)
• M49: 20,253,906 km (0.055 R)
• M50: 20,440,903 km (0.098 R)
• M51: 20,722,447 km (0.085 R)
• M52: 20,910,940 km (0.036 R)
• M53: 21,052,609 km (0.031 R)
• M54: 21,622,427 km (0.104 R)
• M55: 22,923,331 km (0.111 R)
• M56: 23,215,794 km (0.111 R)
• M57: 23,411,468 km (0.064 R)
• M58: 23,509,605 km (0.105 R)
• M59: 23,656,958 km (0.092 R)
• M60: 24,150,332 km (0.097 R)
• M61: 24,398,216 km (0.115 R)
• M62: 24,646,997 km (0.102 R)
• M63: 25,046,872 km (0.113 R)
• M64: 25,297,898 km (0.108 R)
• M65: 25,751,777 km (0.118 R)
• M66: 25,853,055 km (0.096 R)
• M67: 29,637,582 km (0.103 R)
• M68: 30,116,146 km (0.096 R)
• M69: 32,382,553 km (0.103 R)
• M70: 32,875,329 km (0.111 R)
• M71: 33,536,252 km (0.109 R)
• M72: 34,090,363 km (0.092 R)
• M73: 34,201,514 km (0.078 R)
• M74: 35,601,451 km (0.044 R)
• M75: 36,110,084 km (0.082 R)
• M76: 36,393,572 km (0.066 R)
• M77: 36,734,954 km (0.11 R)
• M78: 37,592,748 km (0.087 R)
• M79: 37,765,085 km (0.059 R)
• M80: 38,110,656 km (0.073 R)
• M81: 38,341,635 km (0.066 R)

Planet 7 - Gas Giant

Semi-Major Axis: 7.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 963.2

Radius: 8.2

Gravity: 14.32 G

Time & Orbit

Eccentricity (e): 0.106

Orbit Range: 6.28 AU - 7.76 AU

Year: 6970 Days

Day: 14.2 Hours

Environment

Temp: -169 °C

Axial Tilt: 12.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 64,951,038 km

• M1: 258,505 km (0.071 R)
• M2: 413,937 km (0.107 R)
• M3: 477,516 km (0.089 R)
• M4: 572,810 km (0.088 R)
• M5: 1,072,766 km (0.071 R)
• M6: 2,190,861 km (0.078 R)
• M7: 2,284,359 km (0.108 R)
• M8: 2,355,418 km (0.116 R)
• M9: 2,499,780 km (0.08 R)
• M10: 4,212,676 km (0.094 R)
• M11: 4,271,019 km (0.078 R)
• M12: 4,477,165 km (0.108 R)
• M13: 4,747,189 km (0.094 R)
• M14: 4,838,444 km (0.044 R)
• M15: 5,461,070 km (0.071 R)
• M16: 5,588,677 km (0.114 R)
• M17: 5,717,331 km (0.088 R)
• M18: 5,846,883 km (0.08 R)
• M19: 6,308,093 km (0.103 R)
• M20: 6,610,880 km (0.111 R)
• M21: 7,056,382 km (0.049 R)
• M22: 7,125,945 km (0.046 R)
• M23: 7,405,843 km (0.115 R)
• M24: 8,194,373 km (0.108 R)
• M25: 8,340,680 km (0.049 R)
• M26: 8,524,685 km (0.076 R)
• M27: 8,747,287 km (0.055 R)
• M28: 9,047,230 km (0.113 R)
• M29: 9,236,322 km (0.113 R)
• M30: 9,388,463 km (0.06 R)
• M31: 9,579,948 km (0.071 R)
• M32: 10,005,704 km (0.088 R)
• M33: 10,083,794 km (0.054 R)
• M34: 10,715,845 km (0.093 R)
• M35: 10,875,915 km (0.11 R)
• M36: 11,076,974 km (0.093 R)
• M37: 11,198,298 km (0.062 R)
• M38: 11,893,779 km (0.087 R)
• M39: 12,225,886 km (0.087 R)
• M40: 12,309,511 km (0.107 R)
• M41: 12,519,098 km (0.099 R)
• M42: 13,112,253 km (0.115 R)
• M43: 13,455,431 km (0.069 R)
• M44: 13,975,732 km (0.118 R)
• M45: 14,238,277 km (0.111 R)
• M46: 15,349,938 km (0.069 R)
• M47: 15,575,532 km (0.063 R)
• M48: 15,938,905 km (0.088 R)
• M49: 16,213,268 km (0.12 R)
• M50: 16,443,050 km (0.043 R)
• M51: 16,999,105 km (0.08 R)
• M52: 17,279,452 km (0.115 R)
• M53: 18,463,818 km (0.084 R)
• M54: 18,607,731 km (0.039 R)
• M55: 18,848,285 km (0.071 R)
• M56: 19,919,405 km (0.114 R)
• M57: 20,264,378 km (0.077 R)
• M58: 20,412,779 km (0.103 R)
• M59: 21,060,239 km (0.113 R)
• M60: 21,361,230 km (0.067 R)
• M61: 21,916,986 km (0.066 R)
• M62: 22,222,016 km (0.078 R)
• M63: 23,094,171 km (0.099 R)
• M64: 23,197,394 km (0.091 R)
• M65: 25,242,995 km (0.08 R)
• M66: 25,830,466 km (0.108 R)
• M67: 26,964,119 km (0.104 R)
• M68: 27,400,346 km (0.076 R)
• M69: 27,893,869 km (0.084 R)
• M70: 27,948,921 km (0.111 R)
• M71: 29,559,941 km (0.11 R)
• M72: 30,688,657 km (0.119 R)
• M73: 30,972,893 km (0.112 R)
• M74: 31,029,890 km (0.083 R)
• M75: 32,697,307 km (0.096 R)
• M76: 33,629,751 km (0.095 R)
• M77: 34,216,923 km (0.112 R)
• M78: 35,104,038 km (0.113 R)
• M79: 35,163,428 km (0.112 R)
• M80: 36,058,472 km (0.108 R)
• M81: 36,900,858 km (0.082 R)
• M82: 37,506,281 km (0.09 R)
• M83: 38,298,551 km (0.087 R)
• M84: 38,420,922 km (0.116 R)
• M85: 39,466,162 km (0.057 R)
• M86: 39,837,315 km (0.083 R)
• M87: 40,396,212 km (0.106 R)
• M88: 41,208,229 km (0.083 R)
• M89: 41,836,391 km (0.07 R)

Planet 8 - Ice Giant

Semi-Major Axis: 16 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 296.3

Radius: 6

Gravity: 8.23 G

Time & Orbit

Eccentricity (e): 0.057

Orbit Range: 15.09 AU - 16.91 AU

Year: 23983 Days

Day: 16.3 Hours

Environment

Temp: -192 °C

Axial Tilt: 38.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 64,951,038 km

• M1: 182,061 km (0.057 R)
• M2: 231,278 km (0.049 R)
• M3: 463,604 km (0.095 R)
• M4: 517,758 km (0.106 R)
• M5: 555,158 km (0.107 R)
• M6: 756,816 km (0.113 R)
• M7: 866,172 km (0.081 R)
• M8: 911,500 km (0.074 R)
• M9: 980,764 km (0.077 R)
• M10: 1,076,207 km (0.101 R)
• M11: 1,682,378 km (0.067 R)
• M12: 1,914,554 km (0.083 R)
• M13: 2,839,218 km (0.103 R)
• M14: 2,907,435 km (0.112 R)
• M15: 4,149,097 km (0.059 R)
• M16: 4,383,367 km (0.077 R)
• M17: 4,864,773 km (0.107 R)
• M18: 5,070,470 km (0.117 R)
• M19: 5,195,085 km (0.1 R)
• M20: 5,532,728 km (0.1 R)
• M21: 8,184,200 km (0.12 R)
• M22: 8,281,738 km (0.041 R)
• M23: 8,379,575 km (0.111 R)
• M24: 9,635,449 km (0.1 R)
• M25: 10,311,332 km (0.109 R)
• M26: 10,363,991 km (0.047 R)
• M27: 10,628,480 km (0.114 R)
• M28: 11,598,921 km (0.102 R)
• M29: 11,873,583 km (0.089 R)
• M30: 13,335,753 km (0.079 R)
• M31: 13,681,174 km (0.082 R)
• M32: 13,971,244 km (0.12 R)
• M33: 14,735,091 km (0.077 R)
• M34: 14,853,722 km (0.092 R)
• M35: 15,271,699 km (0.087 R)
• M36: 15,391,975 km (0.075 R)
• M37: 15,875,625 km (0.08 R)
• M38: 16,180,356 km (0.033 R)
• M39: 16,425,697 km (0.101 R)
• M40: 16,610,450 km (0.081 R)
• M41: 16,795,951 km (0.107 R)
• M42: 16,919,968 km (0.086 R)
• M43: 17,607,370 km (0.115 R)
• M44: 17,922,872 km (0.088 R)
• M45: 17,986,302 km (0.086 R)
• M46: 18,240,319 km (0.103 R)
• M47: 19,138,953 km (0.094 R)
• M48: 19,658,806 km (0.065 R)
• M49: 20,051,799 km (0.039 R)
• M50: 21,179,319 km (0.107 R)
• M51: 21,313,358 km (0.087 R)
• M52: 21,514,867 km (0.106 R)
• M53: 21,582,186 km (0.071 R)
• M54: 21,784,442 km (0.078 R)
• M55: 21,919,828 km (0.059 R)
• M56: 22,463,616 km (0.108 R)
• M57: 23,773,046 km (0.082 R)
• M58: 24,331,645 km (0.071 R)
• M59: 25,036,101 km (0.092 R)
• M60: 31,135,506 km (0.078 R)
• M61: 31,746,613 km (0.075 R)
• M62: 34,781,505 km (0.088 R)
• M63: 35,256,478 km (0.101 R)
• M64: 35,574,374 km (0.119 R)
• M65: 36,053,087 km (0.091 R)
• M66: 36,293,191 km (0.119 R)
• M67: 37,907,502 km (0.12 R)
• M68: 38,887,368 km (0.11 R)
• M69: 40,123,794 km (0.032 R)
• M70: 41,792,409 km (0.095 R)
• M71: 42,213,078 km (0.058 R)
• M72: 43,228,399 km (0.107 R)
• M73: 43,313,371 km (0.071 R)
• M74: 43,995,238 km (0.112 R)
• M75: 44,766,564 km (0.108 R)
• M76: 45,283,126 km (0.08 R)
• M77: 45,888,399 km (0.118 R)
• M78: 48,689,320 km (0.085 R)
• M79: 49,664,847 km (0.103 R)
• M80: 50,378,429 km (0.075 R)
• M81: 52,086,538 km (0.105 R)
• M82: 52,539,221 km (0.03 R)
• M83: 53,357,372 km (0.114 R)
• M84: 55,282,547 km (0.081 R)
• M85: 55,467,151 km (0.026 R)
• M86: 55,836,807 km (0.083 R)
• M87: 56,021,859 km (0.119 R)
• M88: 56,764,613 km (0.111 R)
• M89: 57,323,660 km (0.102 R)
• M90: 58,917,775 km (0.101 R)
• M91: 60,906,978 km (0.037 R)
• M92: 61,574,932 km (0.102 R)
• M93: 62,437,364 km (0.06 R)

Kuiper Belt

Range: 30 - 45 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 297 - 15,008 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit