🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.71 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.22

Radius: 1.08

Gravity: 1.05 G

Time & Orbit

Eccentricity (e): 0.101

Orbit Range: 0.64 AU - 0.78 AU

Year: 221 Days

Day: 47.4 Hours

Environment

Temp: 172 °C

Axial Tilt: 38.7 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.8 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.47

Radius: 1.44

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.111

Orbit Range: 0.71 AU - 0.89 AU

Year: 264 Days

Day: 40 Hours

Environment

Temp: 86 °C

Axial Tilt: 8.3 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 3 - Terrestrial

Semi-Major Axis: 1.02 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.34

Radius: 1.62

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.127

Orbit Range: 0.89 AU - 1.15 AU

Year: 380 Days

Day: 22.5 Hours

Environment

Temp: 24 °C

Axial Tilt: 29.9 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 76,620,766 km

• M1: 456,573 km (0.085 R)

Planet 4 - Terrestrial

Semi-Major Axis: 1.72 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.44

Radius: 1.82

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.009

Orbit Range: 1.7 AU - 1.74 AU

Year: 832 Days

Day: 28.8 Hours

Environment

Temp: -46 °C

Axial Tilt: 41.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 76,620,766 km

• M1: 367,412 km (0.093 R)

Planet 5 - Terrestrial

Semi-Major Axis: 3.81 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.28

Radius: 1.79

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.207

Orbit Range: 3.02 AU - 4.6 AU

Year: 2744 Days

Day: 36.9 Hours

Environment

Temp: -130 °C

Axial Tilt: 26.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 4.47 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 6 - Gas Giant

Semi-Major Axis: 5.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 57.7

Radius: 9

Gravity: 0.71 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 4.23 AU - 6.03 AU

Year: 4287 Days

Day: 9.5 Hours

Environment

Temp: -151 °C

Axial Tilt: 159.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (65)

Outer Limit: 76,620,766 km

• M1: 142,866 km (0.11 R)
• M2: 206,595 km (0.12 R)
• M3: 312,510 km (0.109 R)
• M4: 400,025 km (0.087 R)
• M5: 469,438 km (0.117 R)
• M6: 561,441 km (0.074 R)
• M7: 705,504 km (0.084 R)
• M8: 985,700 km (0.079 R)
• M9: 1,045,988 km (0.039 R)
• M10: 1,123,181 km (0.078 R)
• M11: 1,186,311 km (0.115 R)
• M12: 1,341,444 km (0.082 R)
• M13: 1,400,236 km (0.119 R)
• M14: 1,564,644 km (0.108 R)
• M15: 1,763,011 km (0.097 R)
• M16: 1,941,032 km (0.114 R)
• M17: 2,008,052 km (0.117 R)
• M18: 2,105,291 km (0.096 R)
• M19: 2,164,382 km (0.116 R)
• M20: 2,264,164 km (0.051 R)
• M21: 2,416,754 km (0.042 R)
• M22: 2,551,840 km (0.098 R)
• M23: 2,972,061 km (0.049 R)
• M24: 3,207,378 km (0.075 R)
• M25: 3,356,079 km (0.098 R)
• M26: 3,495,504 km (0.12 R)
• M27: 3,624,906 km (0.032 R)
• M28: 3,876,530 km (0.098 R)
• M29: 4,035,103 km (0.099 R)
• M30: 4,096,738 km (0.054 R)
• M31: 4,183,504 km (0.099 R)
• M32: 4,523,989 km (0.119 R)
• M33: 4,600,883 km (0.073 R)
• M34: 4,794,911 km (0.084 R)
• M35: 5,084,532 km (0.07 R)
• M36: 5,191,345 km (0.12 R)
• M37: 5,258,365 km (0.081 R)
• M38: 5,393,452 km (0.088 R)
• M39: 5,667,067 km (0.072 R)
• M40: 5,903,282 km (0.106 R)
• M41: 6,057,816 km (0.104 R)
• M42: 6,544,009 km (0.052 R)
• M43: 6,602,053 km (0.047 R)
• M44: 6,762,572 km (0.109 R)
• M45: 6,850,685 km (0.093 R)
• M46: 6,939,097 km (0.106 R)
• M47: 7,072,539 km (0.087 R)
• M48: 7,161,998 km (0.096 R)
• M49: 7,236,797 km (0.049 R)
• M50: 7,296,786 km (0.07 R)
• M51: 7,432,471 km (0.115 R)
• M52: 7,493,058 km (0.113 R)
• M53: 7,752,461 km (0.036 R)
• M54: 8,248,677 km (0.116 R)
• M55: 8,437,320 km (0.079 R)
• M56: 8,611,601 km (0.069 R)
• M57: 9,304,240 km (0.047 R)
• M58: 9,402,376 km (0.106 R)
• M59: 9,550,178 km (0.104 R)
• M60: 9,781,606 km (0.113 R)
• M61: 9,931,354 km (0.092 R)
• M62: 10,283,657 km (0.061 R)
• M63: 10,588,986 km (0.055 R)
• M64: 11,087,147 km (0.078 R)
• M65: 11,312,890 km (0.107 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 275.4

Radius: 13.8

Gravity: 1.45 G

Time & Orbit

Eccentricity (e): 0.124

Orbit Range: 4.84 AU - 6.2 AU

Year: 4785 Days

Day: 6.4 Hours

Environment

Temp: -151 °C

Axial Tilt: 35.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 76,620,766 km

• M1: 189,989 km (0.073 R)
• M2: 277,654 km (0.061 R)
• M3: 404,513 km (0.075 R)
• M4: 621,430 km (0.068 R)
• M5: 790,475 km (0.073 R)
• M6: 923,168 km (0.064 R)
• M7: 1,075,309 km (0.107 R)
• M8: 1,201,271 km (0.1 R)
• M9: 1,344,885 km (0.108 R)
• M10: 1,520,064 km (0.097 R)
• M11: 1,743,414 km (0.102 R)
• M12: 1,852,470 km (0.098 R)
• M13: 2,049,042 km (0.113 R)
• M14: 2,432,761 km (0.116 R)
• M15: 2,524,614 km (0.102 R)
• M16: 2,696,053 km (0.064 R)
• M17: 2,920,150 km (0.089 R)
• M18: 3,034,593 km (0.096 R)
• M19: 3,251,211 km (0.099 R)
• M20: 3,352,787 km (0.096 R)
• M21: 3,507,472 km (0.11 R)
• M22: 3,699,705 km (0.11 R)
• M23: 4,223,447 km (0.097 R)
• M24: 4,447,096 km (0.091 R)
• M25: 4,560,491 km (0.085 R)
• M26: 4,693,932 km (0.054 R)
• M27: 4,790,124 km (0.044 R)
• M28: 5,043,243 km (0.072 R)
• M29: 5,221,115 km (0.11 R)
• M30: 5,421,128 km (0.057 R)
• M31: 5,705,663 km (0.094 R)
• M32: 6,057,667 km (0.093 R)
• M33: 7,090,041 km (0.102 R)
• M34: 7,513,703 km (0.097 R)
• M35: 7,968,779 km (0.086 R)
• M36: 8,503,143 km (0.069 R)
• M37: 8,762,845 km (0.108 R)
• M38: 8,977,368 km (0.066 R)
• M39: 9,121,281 km (0.027 R)
• M40: 9,557,808 km (0.117 R)
• M41: 9,902,182 km (0.084 R)
• M42: 10,050,883 km (0.048 R)
• M43: 10,200,480 km (0.03 R)
• M44: 10,350,826 km (0.08 R)
• M45: 10,831,634 km (0.115 R)
• M46: 11,164,938 km (0.109 R)
• M47: 11,268,160 km (0.087 R)
• M48: 11,501,533 km (0.086 R)
• M49: 11,973,215 km (0.041 R)
• M50: 12,424,552 km (0.111 R)
• M51: 13,071,264 km (0.064 R)
• M52: 13,316,604 km (0.111 R)
• M53: 13,590,967 km (0.111 R)
• M54: 13,922,775 km (0.108 R)
• M55: 14,425,573 km (0.074 R)
• M56: 14,594,469 km (0.119 R)
• M57: 15,305,358 km (0.096 R)
• M58: 15,506,418 km (0.092 R)
• M59: 16,114,982 km (0.078 R)
• M60: 16,997,759 km (0.046 R)
• M61: 17,176,229 km (0.057 R)
• M62: 17,295,608 km (0.03 R)
• M63: 18,534,727 km (0.073 R)
• M64: 18,995,190 km (0.038 R)
• M65: 19,211,359 km (0.1 R)
• M66: 19,335,226 km (0.08 R)
• M67: 19,459,392 km (0.047 R)
• M68: 19,990,015 km (0.079 R)
• M69: 21,289,572 km (0.106 R)
• M70: 21,642,922 km (0.118 R)

Planet 8 - Gas Giant

Semi-Major Axis: 8.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 435.6

Radius: 11.9

Gravity: 3.08 G

Time & Orbit

Eccentricity (e): 0.032

Orbit Range: 8.62 AU - 9.2 AU

Year: 9813 Days

Day: 13.1 Hours

Environment

Temp: -179 °C

Axial Tilt: 8.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 76,620,766 km

• M1: 151,692 km (0.047 R)
• M2: 380,128 km (0.11 R)
• M3: 460,313 km (0.07 R)
• M4: 744,100 km (0.103 R)
• M5: 820,096 km (0.112 R)
• M6: 1,527,843 km (0.064 R)
• M7: 1,668,166 km (0.066 R)
• M8: 1,812,827 km (0.101 R)
• M9: 2,410,470 km (0.114 R)
• M10: 2,670,920 km (0.113 R)
• M11: 3,401,257 km (0.118 R)
• M12: 3,613,387 km (0.083 R)
• M13: 3,912,284 km (0.101 R)
• M14: 4,078,636 km (0.101 R)
• M15: 4,418,672 km (0.113 R)
• M16: 4,797,604 km (0.093 R)
• M17: 5,066,132 km (0.082 R)
• M18: 5,524,649 km (0.09 R)
• M19: 5,964,617 km (0.111 R)
• M20: 6,124,537 km (0.099 R)
• M21: 6,350,878 km (0.072 R)
• M22: 6,712,157 km (0.116 R)
• M23: 7,080,168 km (0.078 R)
• M24: 7,283,771 km (0.107 R)
• M25: 7,558,133 km (0.068 R)
• M26: 7,836,086 km (0.08 R)
• M27: 8,509,426 km (0.048 R)
• M28: 8,653,638 km (0.088 R)
• M29: 8,980,959 km (0.114 R)
• M30: 9,573,067 km (0.065 R)
• M31: 9,836,060 km (0.082 R)
• M32: 10,484,716 km (0.108 R)
• M33: 10,639,401 km (0.05 R)
• M34: 10,794,833 km (0.081 R)
• M35: 11,226,273 km (0.092 R)
• M36: 11,384,398 km (0.111 R)
• M37: 11,703,191 km (0.06 R)
• M38: 11,863,710 km (0.086 R)
• M39: 11,944,193 km (0.115 R)
• M40: 12,065,367 km (0.1 R)
• M41: 12,472,124 km (0.114 R)
• M42: 12,800,641 km (0.11 R)
• M43: 13,090,562 km (0.048 R)
• M44: 14,143,731 km (0.113 R)
• M45: 14,875,264 km (0.089 R)
• M46: 15,884,751 km (0.043 R)
• M47: 16,285,673 km (0.07 R)
• M48: 16,599,978 km (0.09 R)
• M49: 17,463,008 km (0.089 R)
• M50: 17,600,489 km (0.096 R)
• M51: 18,340,549 km (0.1 R)
• M52: 18,714,394 km (0.094 R)
• M53: 20,090,396 km (0.068 R)
• M54: 21,646,513 km (0.113 R)
• M55: 22,091,118 km (0.086 R)
• M56: 22,638,646 km (0.066 R)
• M57: 23,899,606 km (0.049 R)
• M58: 25,442,708 km (0.096 R)
• M59: 25,546,828 km (0.099 R)
• M60: 27,924,537 km (0.05 R)
• M61: 28,408,486 km (0.091 R)
• M62: 29,058,190 km (0.116 R)
• M63: 29,221,401 km (0.098 R)
• M64: 29,330,308 km (0.113 R)
• M65: 29,986,893 km (0.055 R)
• M66: 30,317,056 km (0.041 R)
• M67: 31,091,973 km (0.117 R)
• M68: 31,593,574 km (0.061 R)
• M69: 32,154,118 km (0.088 R)
• M70: 32,379,262 km (0.083 R)
• M71: 33,228,230 km (0.064 R)
• M72: 34,428,903 km (0.086 R)
• M73: 35,005,752 km (0.076 R)
• M74: 35,469,506 km (0.086 R)
• M75: 36,110,383 km (0.092 R)
• M76: 36,637,715 km (0.088 R)
• M77: 37,522,138 km (0.115 R)
• M78: 38,712,339 km (0.085 R)
• M79: 39,372,215 km (0.114 R)

Planet 9 - Gas Giant

Semi-Major Axis: 9.66 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 152.7

Radius: 9.7

Gravity: 1.62 G

Time & Orbit

Eccentricity (e): 0.127

Orbit Range: 8.43 AU - 10.89 AU

Year: 11078 Days

Day: 8.6 Hours

Environment

Temp: -184 °C

Axial Tilt: 9.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 76,620,766 km

• M1: 123,418 km (0.074 R)
• M2: 195,524 km (0.12 R)
• M3: 314,904 km (0.103 R)
• M4: 406,757 km (0.097 R)
• M5: 553,512 km (0.108 R)
• M6: 795,861 km (0.042 R)
• M7: 861,833 km (0.044 R)
• M8: 929,751 km (0.084 R)
• M9: 1,190,350 km (0.041 R)
• M10: 1,523,505 km (0.076 R)
• M11: 1,624,034 km (0.057 R)
• M12: 1,796,670 km (0.076 R)
• M13: 2,067,293 km (0.114 R)
• M14: 2,274,037 km (0.091 R)
• M15: 2,586,996 km (0.099 R)
• M16: 2,934,661 km (0.064 R)
• M17: 3,146,043 km (0.116 R)
• M18: 3,297,137 km (0.085 R)
• M19: 3,584,215 km (0.065 R)
• M20: 3,719,452 km (0.065 R)
• M21: 3,971,823 km (0.06 R)
• M22: 4,158,821 km (0.067 R)
• M23: 4,229,730 km (0.103 R)
• M24: 4,961,114 km (0.085 R)
• M25: 5,188,204 km (0.097 R)
• M26: 5,418,734 km (0.108 R)
• M27: 5,496,226 km (0.088 R)
• M28: 5,678,735 km (0.087 R)
• M29: 5,863,339 km (0.056 R)
• M30: 6,401,442 km (0.104 R)
• M31: 6,676,553 km (0.12 R)
• M32: 6,871,479 km (0.043 R)
• M33: 7,381,159 km (0.089 R)
• M34: 7,611,540 km (0.118 R)
• M35: 7,932,427 km (0.085 R)
• M36: 9,602,089 km (0.055 R)
• M37: 9,727,602 km (0.108 R)
• M38: 10,203,472 km (0.111 R)
• M39: 10,784,510 km (0.104 R)
• M40: 11,144,892 km (0.119 R)
• M41: 11,709,474 km (0.056 R)
• M42: 13,179,273 km (0.087 R)
• M43: 13,353,854 km (0.093 R)
• M44: 13,705,559 km (0.083 R)
• M45: 14,453,847 km (0.05 R)
• M46: 14,597,910 km (0.115 R)
• M47: 15,251,952 km (0.072 R)
• M48: 15,767,466 km (0.105 R)
• M49: 16,027,317 km (0.113 R)
• M50: 16,513,660 km (0.113 R)
• M51: 16,815,249 km (0.029 R)
• M52: 17,615,897 km (0.061 R)
• M53: 17,731,387 km (0.074 R)
• M54: 18,079,052 km (0.097 R)
• M55: 18,741,920 km (0.114 R)
• M56: 19,851,189 km (0.051 R)
• M57: 20,333,043 km (0.032 R)
• M58: 20,494,459 km (0.077 R)
• M59: 21,063,081 km (0.104 R)
• M60: 21,185,602 km (0.093 R)
• M61: 21,554,510 km (0.111 R)
• M62: 21,801,646 km (0.028 R)
• M63: 22,132,706 km (0.096 R)
• M64: 23,897,661 km (0.12 R)
• M65: 24,753,960 km (0.088 R)
• M66: 25,315,849 km (0.115 R)
• M67: 25,576,598 km (0.062 R)
• M68: 26,540,457 km (0.054 R)
• M69: 27,337,964 km (0.048 R)
• M70: 27,605,445 km (0.084 R)
• M71: 28,278,186 km (0.076 R)
• M72: 28,775,001 km (0.105 R)
• M73: 28,956,313 km (0.072 R)
• M74: 29,411,390 km (0.112 R)
• M75: 29,960,564 km (0.099 R)
• M76: 30,144,420 km (0.093 R)
• M77: 30,976,184 km (0.083 R)

Planet 10 - Ice Giant

Semi-Major Axis: 15.7 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 531.1

Radius: 3.2

Gravity: 51.87 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 12.04 AU - 19.36 AU

Year: 22952 Days

Day: 24.8 Hours

Environment

Temp: -193 °C

Axial Tilt: 15.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 76,620,766 km

• M1: 498,909 km (0.114 R)
• M2: 1,109,567 km (0.049 R)
• M3: 2,211,655 km (0.065 R)
• M4: 2,608,239 km (0.028 R)
• M5: 2,871,830 km (0.095 R)
• M6: 3,464,986 km (0.056 R)
• M7: 3,546,816 km (0.099 R)
• M8: 4,355,991 km (0.1 R)
• M9: 4,488,684 km (0.082 R)
• M10: 6,182,880 km (0.114 R)
• M11: 6,786,956 km (0.065 R)
• M12: 6,838,119 km (0.07 R)
• M13: 7,095,876 km (0.088 R)
• M14: 7,199,996 km (0.119 R)
• M15: 8,597,390 km (0.107 R)
• M16: 8,987,690 km (0.116 R)
• M17: 9,326,679 km (0.074 R)
• M18: 9,497,819 km (0.064 R)
• M19: 9,959,029 km (0.087 R)
• M20: 10,017,223 km (0.102 R)
• M21: 10,605,292 km (0.063 R)
• M22: 12,061,328 km (0.062 R)
• M23: 12,185,495 km (0.085 R)
• M24: 13,385,868 km (0.047 R)
• M25: 13,450,045 km (0.09 R)
• M26: 13,837,504 km (0.104 R)
• M27: 13,902,429 km (0.111 R)
• M28: 14,822,007 km (0.115 R)
• M29: 15,289,202 km (0.097 R)
• M30: 16,581,278 km (0.069 R)
• M31: 18,548,191 km (0.099 R)
• M32: 19,195,800 km (0.119 R)
• M33: 19,340,761 km (0.118 R)
• M34: 20,958,961 km (0.1 R)
• M35: 21,407,754 km (0.067 R)
• M36: 21,859,690 km (0.107 R)
• M37: 21,935,386 km (0.067 R)
• M38: 22,162,775 km (0.114 R)
• M39: 22,467,207 km (0.038 R)
• M40: 22,619,946 km (0.052 R)
• M41: 23,080,259 km (0.073 R)
• M42: 23,621,055 km (0.119 R)
• M43: 24,479,448 km (0.112 R)
• M44: 26,066,232 km (0.07 R)
• M45: 27,359,356 km (0.093 R)
• M46: 28,095,826 km (0.114 R)
• M47: 28,178,105 km (0.052 R)
• M48: 28,921,756 km (0.113 R)
• M49: 29,588,215 km (0.109 R)
• M50: 31,276,427 km (0.114 R)
• M51: 32,218,295 km (0.103 R)
• M52: 33,517,403 km (0.1 R)
• M53: 33,604,618 km (0.047 R)
• M54: 34,921,977 km (0.118 R)
• M55: 36,524,919 km (0.061 R)
• M56: 37,969,735 km (0.104 R)
• M57: 39,986,763 km (0.108 R)
• M58: 40,728,768 km (0.066 R)
• M59: 41,475,262 km (0.094 R)
• M60: 42,320,639 km (0.081 R)
• M61: 43,741,969 km (0.094 R)
• M62: 44,602,306 km (0.114 R)
• M63: 47,216,678 km (0.057 R)
• M64: 47,314,366 km (0.068 R)
• M65: 47,510,189 km (0.086 R)
• M66: 49,085,904 km (0.115 R)
• M67: 49,780,636 km (0.101 R)
• M68: 50,478,660 km (0.1 R)
• M69: 50,778,753 km (0.102 R)
• M70: 50,878,834 km (0.066 R)
• M71: 53,506,371 km (0.075 R)
• M72: 53,608,397 km (0.098 R)
• M73: 55,557,508 km (0.062 R)
• M74: 56,385,083 km (0.025 R)
• M75: 56,696,396 km (0.096 R)
• M76: 57,634,076 km (0.114 R)
• M77: 58,471,824 km (0.104 R)
• M78: 58,576,841 km (0.118 R)
• M79: 58,681,859 km (0.086 R)
• M80: 60,689,911 km (0.097 R)
• M81: 63,258,357 km (0.084 R)
• M82: 63,581,937 km (0.084 R)
• M83: 65,753,051 km (0.085 R)
• M84: 67,948,250 km (0.041 R)
• M85: 69,276,829 km (0.067 R)
• M86: 70,055,785 km (0.09 R)
• M87: 71,285,779 km (0.088 R)
• M88: 73,200,632 km (0.065 R)
• M89: 73,880,404 km (0.113 R)
• M90: 74,790,259 km (0.051 R)
• M91: 74,904,103 km (0.037 R)
• M92: 76,047,180 km (0.083 R)
• M93: 76,505,997 km (0.083 R)

Kuiper Belt

Range: 30 - 50 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 213 - 12,741 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit