🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.51 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.24

Radius: 1.78

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.218

Orbit Range: 0.4 AU - 0.62 AU

Year: 134 Days

Day: 20.6 Hours

Environment

Temp: 221 °C

Axial Tilt: 8.1 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.06 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.65

Radius: 1.68

Gravity: 1.29 G

Time & Orbit

Eccentricity (e): 0.222

Orbit Range: 0.82 AU - 1.3 AU

Year: 403 Days

Day: 28.5 Hours

Environment

Temp: 7 °C

Axial Tilt: 31.4 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 3 - Terrestrial

Semi-Major Axis: 3.8 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.95

Radius: 1.73

Gravity: 1.32 G

Time & Orbit

Eccentricity (e): 0.193

Orbit Range: 3.07 AU - 4.53 AU

Year: 2733 Days

Day: 14 Hours

Environment

Temp: -122 °C

Axial Tilt: 36.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 4.38 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.5

Radius: 1.18

Gravity: 1.08 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 4.07 AU - 4.69 AU

Year: 3382 Days

Day: 30.3 Hours

Environment

Temp: -142 °C

Axial Tilt: 36 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 5.23 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 480.3

Radius: 10.9

Gravity: 4.04 G

Time & Orbit

Eccentricity (e): 0.183

Orbit Range: 4.27 AU - 6.19 AU

Year: 4413 Days

Day: 11 Hours

Environment

Temp: -151 °C

Axial Tilt: 6.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 65,668,384 km

• M1: 137,780 km (0.103 R)
• M2: 269,575 km (0.052 R)
• M3: 339,288 km (0.075 R)
• M4: 523,742 km (0.118 R)
• M5: 619,784 km (0.084 R)
• M6: 888,611 km (0.073 R)
• M7: 1,043,296 km (0.118 R)
• M8: 1,143,227 km (0.103 R)
• M9: 1,462,918 km (0.114 R)
• M10: 1,533,229 km (0.1 R)
• M11: 1,647,970 km (0.093 R)
• M12: 1,871,320 km (0.051 R)
• M13: 2,072,978 km (0.112 R)
• M14: 2,364,095 km (0.099 R)
• M15: 2,514,740 km (0.086 R)
• M16: 3,277,839 km (0.07 R)
• M17: 3,352,339 km (0.083 R)
• M18: 3,694,918 km (0.03 R)
• M19: 3,811,604 km (0.102 R)
• M20: 3,969,131 km (0.073 R)
• M21: 4,392,941 km (0.077 R)
• M22: 4,599,985 km (0.113 R)
• M23: 5,305,788 km (0.119 R)
• M24: 5,504,154 km (0.12 R)
• M25: 5,908,368 km (0.048 R)
• M26: 6,045,250 km (0.116 R)
• M27: 6,183,329 km (0.052 R)
• M28: 6,252,593 km (0.09 R)
• M29: 6,322,305 km (0.057 R)
• M30: 6,485,816 km (0.079 R)
• M31: 6,840,961 km (0.119 R)
• M32: 7,057,130 km (0.053 R)
• M33: 7,422,448 km (0.095 R)
• M34: 7,844,015 km (0.092 R)
• M35: 8,349,955 km (0.093 R)
• M36: 8,452,429 km (0.033 R)
• M37: 8,606,814 km (0.096 R)
• M38: 8,684,456 km (0.094 R)
• M39: 9,023,444 km (0.077 R)
• M40: 9,154,941 km (0.099 R)
• M41: 9,473,285 km (0.09 R)
• M42: 9,633,804 km (0.034 R)
• M43: 9,822,297 km (0.073 R)
• M44: 9,957,533 km (0.085 R)
• M45: 10,039,064 km (0.116 R)
• M46: 10,148,121 km (0.071 R)
• M47: 10,588,238 km (0.096 R)
• M48: 10,699,240 km (0.103 R)
• M49: 11,090,737 km (0.053 R)
• M50: 11,544,019 km (0.041 R)
• M51: 12,851,355 km (0.093 R)
• M52: 13,627,917 km (0.109 R)
• M53: 14,113,362 km (0.065 R)
• M54: 14,511,891 km (0.039 R)
• M55: 14,604,492 km (0.113 R)
• M56: 14,728,060 km (0.101 R)
• M57: 15,194,955 km (0.042 R)
• M58: 16,207,134 km (0.061 R)
• M59: 16,367,353 km (0.12 R)
• M60: 16,850,854 km (0.038 R)
• M61: 16,948,092 km (0.082 R)
• M62: 17,799,005 km (0.038 R)
• M63: 18,898,998 km (0.057 R)
• M64: 19,135,064 km (0.083 R)
• M65: 19,746,919 km (0.112 R)
• M66: 19,917,909 km (0.068 R)
• M67: 20,055,240 km (0.1 R)
• M68: 20,261,536 km (0.111 R)
• M69: 20,365,057 km (0.076 R)
• M70: 20,954,772 km (0.058 R)
• M71: 21,726,248 km (0.107 R)
• M72: 21,902,923 km (0.079 R)
• M73: 22,400,037 km (0.077 R)
• M74: 22,542,754 km (0.028 R)
• M75: 23,116,611 km (0.057 R)
• M76: 23,513,943 km (0.096 R)
• M77: 23,731,608 km (0.083 R)
• M78: 24,059,526 km (0.1 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.45 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 301.9

Radius: 9.5

Gravity: 3.35 G

Time & Orbit

Eccentricity (e): 0.201

Orbit Range: 5.15 AU - 7.75 AU

Year: 6044 Days

Day: 11.3 Hours

Environment

Temp: -166 °C

Axial Tilt: 139.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 65,668,384 km

• M1: 152,291 km (0.107 R)
• M2: 318,045 km (0.091 R)
• M3: 434,881 km (0.089 R)
• M4: 727,644 km (0.039 R)
• M5: 842,535 km (0.088 R)
• M6: 1,306,887 km (0.111 R)
• M7: 1,477,877 km (0.099 R)
• M8: 1,656,348 km (0.115 R)
• M9: 1,937,592 km (0.086 R)
• M10: 2,067,443 km (0.113 R)
• M11: 2,234,095 km (0.086 R)
• M12: 2,302,012 km (0.082 R)
• M13: 2,760,230 km (0.088 R)
• M14: 2,962,786 km (0.11 R)
• M15: 3,246,723 km (0.081 R)
• M16: 3,480,394 km (0.108 R)
• M17: 3,559,382 km (0.102 R)
• M18: 4,005,333 km (0.111 R)
• M19: 4,109,154 km (0.058 R)
• M20: 4,298,396 km (0.109 R)
• M21: 4,490,479 km (0.111 R)
• M22: 4,620,181 km (0.056 R)
• M23: 4,794,911 km (0.115 R)
• M24: 5,083,784 km (0.059 R)
• M25: 5,241,610 km (0.117 R)
• M26: 5,515,973 km (0.078 R)
• M27: 5,608,574 km (0.117 R)
• M28: 5,960,129 km (0.106 R)
• M29: 6,440,188 km (0.095 R)
• M30: 6,882,848 km (0.093 R)
• M31: 7,007,613 km (0.093 R)
• M32: 7,082,861 km (0.083 R)
• M33: 7,823,669 km (0.116 R)
• M34: 8,163,855 km (0.065 R)
• M35: 8,348,908 km (0.068 R)
• M36: 8,858,588 km (0.077 R)
• M37: 9,572,169 km (0.111 R)
• M38: 10,247,305 km (0.093 R)
• M39: 10,734,844 km (0.046 R)
• M40: 10,879,655 km (0.101 R)
• M41: 11,318,126 km (0.111 R)
• M42: 11,406,538 km (0.1 R)
• M43: 11,702,742 km (0.099 R)
• M44: 11,792,202 km (0.111 R)
• M45: 12,302,929 km (0.108 R)
• M46: 13,067,224 km (0.057 R)
• M47: 13,159,975 km (0.083 R)
• M48: 13,346,075 km (0.103 R)
• M49: 13,752,532 km (0.064 R)
• M50: 13,909,909 km (0.088 R)
• M51: 15,028,303 km (0.068 R)
• M52: 16,742,545 km (0.094 R)
• M53: 17,418,278 km (0.11 R)
• M54: 17,862,285 km (0.101 R)
• M55: 18,379,295 km (0.046 R)
• M56: 18,831,380 km (0.064 R)
• M57: 19,041,116 km (0.052 R)
• M58: 19,533,892 km (0.067 R)
• M59: 20,388,245 km (0.043 R)
• M60: 21,000,848 km (0.107 R)
• M61: 21,765,892 km (0.053 R)
• M62: 22,133,454 km (0.103 R)
• M63: 22,688,611 km (0.08 R)
• M64: 23,360,904 km (0.036 R)
• M65: 23,850,389 km (0.079 R)
• M66: 24,153,324 km (0.081 R)
• M67: 25,223,847 km (0.098 R)
• M68: 26,036,761 km (0.119 R)

Asteroid Belt

Center: 6.72 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 7 - Gas Giant

Semi-Major Axis: 6.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 460.2

Radius: 11.1

Gravity: 3.74 G

Time & Orbit

Eccentricity (e): 0.129

Orbit Range: 6.09 AU - 7.89 AU

Year: 6819 Days

Day: 8.9 Hours

Environment

Temp: -168 °C

Axial Tilt: 22.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 65,668,384 km

• M1: 222,901 km (0.066 R)
• M2: 406,906 km (0.11 R)
• M3: 544,387 km (0.086 R)
• M4: 699,669 km (0.034 R)
• M5: 789,877 km (0.058 R)
• M6: 1,271,582 km (0.105 R)
• M7: 1,368,222 km (0.079 R)
• M8: 1,762,263 km (0.086 R)
• M9: 1,870,871 km (0.116 R)
• M10: 2,210,608 km (0.04 R)
• M11: 2,407,927 km (0.057 R)
• M12: 2,570,091 km (0.108 R)
• M13: 2,756,790 km (0.096 R)
• M14: 2,883,798 km (0.095 R)
• M15: 3,827,312 km (0.043 R)
• M16: 3,993,366 km (0.103 R)
• M17: 4,065,173 km (0.108 R)
• M18: 4,137,578 km (0.05 R)
• M19: 4,332,654 km (0.103 R)
• M20: 5,512,682 km (0.093 R)
• M21: 6,138,150 km (0.101 R)
• M22: 6,786,208 km (0.119 R)
• M23: 7,103,954 km (0.119 R)
• M24: 7,308,604 km (0.025 R)
• M25: 7,485,728 km (0.059 R)
• M26: 7,574,739 km (0.103 R)
• M27: 7,694,118 km (0.063 R)
• M28: 8,147,100 km (0.097 R)
• M29: 8,453,925 km (0.029 R)
• M30: 8,733,224 km (0.079 R)
• M31: 10,109,974 km (0.098 R)
• M32: 10,606,040 km (0.114 R)
• M33: 11,177,953 km (0.108 R)
• M34: 11,382,154 km (0.046 R)
• M35: 11,828,853 km (0.097 R)
• M36: 11,967,530 km (0.067 R)
• M37: 12,036,944 km (0.04 R)
• M38: 13,203,508 km (0.052 R)
• M39: 13,491,634 km (0.105 R)
• M40: 14,001,014 km (0.082 R)
• M41: 14,074,317 km (0.071 R)
• M42: 14,221,222 km (0.059 R)
• M43: 14,516,678 km (0.103 R)
• M44: 14,702,329 km (0.087 R)
• M45: 15,490,860 km (0.094 R)
• M46: 15,566,706 km (0.089 R)
• M47: 15,642,701 km (0.12 R)
• M48: 16,100,920 km (0.072 R)
• M49: 16,177,663 km (0.052 R)
• M50: 16,370,196 km (0.111 R)
• M51: 16,486,134 km (0.081 R)
• M52: 16,835,445 km (0.111 R)
• M53: 17,739,316 km (0.058 R)
• M54: 18,137,246 km (0.053 R)
• M55: 18,417,592 km (0.065 R)
• M56: 18,538,168 km (0.056 R)
• M57: 18,699,285 km (0.12 R)
• M58: 18,820,459 km (0.118 R)
• M59: 19,185,628 km (0.095 R)
• M60: 19,717,149 km (0.097 R)
• M61: 19,964,135 km (0.088 R)
• M62: 20,088,002 km (0.12 R)
• M63: 20,627,751 km (0.026 R)
• M64: 20,711,227 km (0.109 R)
• M65: 22,019,161 km (0.116 R)
• M66: 22,104,432 km (0.117 R)
• M67: 22,232,637 km (0.11 R)
• M68: 23,789,801 km (0.101 R)
• M69: 24,670,185 km (0.1 R)
• M70: 24,936,319 km (0.088 R)
• M71: 25,561,040 km (0.099 R)
• M72: 25,695,678 km (0.11 R)
• M73: 26,236,175 km (0.086 R)
• M74: 26,326,682 km (0.058 R)
• M75: 26,735,084 km (0.103 R)
• M76: 26,871,667 km (0.105 R)
• M77: 27,328,689 km (0.116 R)
• M78: 29,651,794 km (0.102 R)
• M79: 30,456,032 km (0.098 R)
• M80: 31,844,600 km (0.111 R)
• M81: 32,473,659 km (0.095 R)

Planet 8 - Gas Giant

Semi-Major Axis: 7.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 637.1

Radius: 14.7

Gravity: 2.95 G

Time & Orbit

Eccentricity (e): 0.029

Orbit Range: 7.5 AU - 7.94 AU

Year: 7914 Days

Day: 6.2 Hours

Environment

Temp: -161 °C

Axial Tilt: 20.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 65,668,384 km

• M1: 248,781 km (0.113 R)
• M2: 466,446 km (0.085 R)
• M3: 1,050,925 km (0.049 R)
• M4: 1,386,623 km (0.115 R)
• M5: 1,736,831 km (0.109 R)
• M6: 2,337,766 km (0.03 R)
• M7: 2,591,035 km (0.058 R)
• M8: 2,877,964 km (0.048 R)
• M9: 3,125,100 km (0.097 R)
• M10: 3,276,792 km (0.119 R)
• M11: 4,100,178 km (0.034 R)
• M12: 4,956,177 km (0.103 R)
• M13: 5,104,279 km (0.096 R)
• M14: 6,697,945 km (0.114 R)
• M15: 7,160,951 km (0.098 R)
• M16: 7,430,077 km (0.106 R)
• M17: 7,531,954 km (0.114 R)
• M18: 7,634,279 km (0.112 R)
• M19: 7,805,867 km (0.079 R)
• M20: 8,048,216 km (0.11 R)
• M21: 8,682,810 km (0.119 R)
• M22: 9,224,205 km (0.102 R)
• M23: 10,150,814 km (0.116 R)
• M24: 10,263,910 km (0.055 R)
• M25: 10,453,600 km (0.066 R)
• M26: 10,797,825 km (0.081 R)
• M27: 10,952,060 km (0.059 R)
• M28: 11,145,789 km (0.104 R)
• M29: 11,262,625 km (0.108 R)
• M30: 11,892,732 km (0.106 R)
• M31: 12,413,183 km (0.031 R)
• M32: 12,574,748 km (0.088 R)
• M33: 13,600,840 km (0.052 R)
• M34: 13,851,117 km (0.081 R)
• M35: 14,102,890 km (0.099 R)
• M36: 14,568,589 km (0.067 R)
• M37: 14,867,485 km (0.111 R)
• M38: 15,082,308 km (0.116 R)
• M39: 15,211,710 km (0.07 R)
• M40: 15,384,795 km (0.06 R)
• M41: 16,127,698 km (0.089 R)
• M42: 16,348,355 km (0.099 R)
• M43: 16,748,230 km (0.117 R)
• M44: 16,882,269 km (0.103 R)
• M45: 17,331,512 km (0.117 R)
• M46: 18,058,707 km (0.112 R)
• M47: 18,518,122 km (0.118 R)
• M48: 18,610,574 km (0.102 R)
• M49: 19,354,973 km (0.059 R)
• M50: 19,636,815 km (0.084 R)
• M51: 20,873,241 km (0.064 R)
• M52: 21,113,944 km (0.111 R)
• M53: 21,841,439 km (0.099 R)
• M54: 22,478,726 km (0.119 R)
• M55: 23,121,996 km (0.105 R)
• M56: 23,221,629 km (0.045 R)
• M57: 23,321,261 km (0.078 R)
• M58: 23,520,974 km (0.106 R)
• M59: 24,073,289 km (0.085 R)
• M60: 24,224,682 km (0.118 R)
• M61: 25,037,298 km (0.069 R)
• M62: 25,446,897 km (0.063 R)
• M63: 25,549,671 km (0.095 R)
• M64: 25,910,501 km (0.086 R)
• M65: 26,013,873 km (0.098 R)
• M66: 26,169,305 km (0.088 R)
• M67: 27,003,014 km (0.067 R)
• M68: 27,951,465 km (0.098 R)
• M69: 28,536,392 km (0.091 R)
• M70: 29,125,359 km (0.111 R)
• M71: 29,935,132 km (0.032 R)
• M72: 30,478,921 km (0.086 R)
• M73: 31,245,909 km (0.094 R)
• M74: 31,963,829 km (0.082 R)
• M75: 32,854,834 km (0.118 R)
• M76: 33,641,270 km (0.099 R)
• M77: 34,604,381 km (0.075 R)
• M78: 36,906,393 km (0.115 R)
• M79: 37,314,346 km (0.028 R)
• M80: 38,429,150 km (0.104 R)
• M81: 39,554,874 km (0.111 R)

Planet 9 - Ice Giant

Semi-Major Axis: 15.42 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 352.9

Radius: 7.6

Gravity: 6.11 G

Time & Orbit

Eccentricity (e): 0.102

Orbit Range: 13.85 AU - 16.99 AU

Year: 22341 Days

Day: 24.7 Hours

Environment

Temp: -193 °C

Axial Tilt: 147.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 65,668,384 km

• M1: 418,425 km (0.054 R)
• M2: 561,142 km (0.092 R)
• M3: 679,174 km (0.095 R)
• M4: 1,156,242 km (0.079 R)
• M5: 1,468,453 km (0.086 R)
• M6: 2,014,635 km (0.108 R)
• M7: 2,075,521 km (0.088 R)
• M8: 2,262,219 km (0.117 R)
• M9: 2,585,350 km (0.112 R)
• M10: 2,820,369 km (0.08 R)
• M11: 3,062,268 km (0.107 R)
• M12: 3,419,658 km (0.027 R)
• M13: 3,942,203 km (0.083 R)
• M14: 4,252,020 km (0.109 R)
• M15: 4,569,617 km (0.057 R)
• M16: 5,354,706 km (0.104 R)
• M17: 5,439,827 km (0.084 R)
• M18: 5,784,501 km (0.113 R)
• M19: 6,180,935 km (0.059 R)
• M20: 6,769,004 km (0.097 R)
• M21: 7,046,359 km (0.111 R)
• M22: 7,517,143 km (0.1 R)
• M23: 8,538,448 km (0.109 R)
• M24: 8,637,931 km (0.097 R)
• M25: 9,345,379 km (0.114 R)
• M26: 9,499,465 km (0.118 R)
• M27: 9,914,300 km (0.091 R)
• M28: 11,577,230 km (0.093 R)
• M29: 12,525,381 km (0.107 R)
• M30: 12,581,929 km (0.054 R)
• M31: 13,905,870 km (0.055 R)
• M32: 14,023,005 km (0.12 R)
• M33: 14,673,606 km (0.111 R)
• M34: 15,032,641 km (0.082 R)
• M35: 16,745,836 km (0.075 R)
• M36: 17,246,540 km (0.118 R)
• M37: 17,372,502 km (0.112 R)
• M38: 17,815,760 km (0.072 R)
• M39: 18,070,824 km (0.041 R)
• M40: 18,134,703 km (0.103 R)
• M41: 18,198,731 km (0.07 R)
• M42: 18,262,758 km (0.065 R)
• M43: 18,713,497 km (0.049 R)
• M44: 19,102,751 km (0.114 R)
• M45: 22,380,141 km (0.081 R)
• M46: 22,448,806 km (0.113 R)
• M47: 23,557,177 km (0.106 R)
• M48: 24,683,200 km (0.075 R)
• M49: 25,539,199 km (0.081 R)
• M50: 28,984,587 km (0.072 R)
• M51: 29,059,536 km (0.04 R)
• M52: 29,510,125 km (0.06 R)
• M53: 29,585,372 km (0.085 R)
• M54: 29,811,714 km (0.06 R)
• M55: 30,038,654 km (0.099 R)
• M56: 30,266,192 km (0.119 R)
• M57: 31,720,433 km (0.047 R)
• M58: 31,874,818 km (0.101 R)
• M59: 32,184,336 km (0.104 R)
• M60: 33,040,784 km (0.093 R)
• M61: 34,220,663 km (0.093 R)
• M62: 35,574,523 km (0.097 R)
• M63: 35,654,708 km (0.109 R)
• M64: 37,678,617 km (0.088 R)
• M65: 37,760,447 km (0.084 R)
• M66: 38,580,992 km (0.117 R)
• M67: 40,909,782 km (0.107 R)
• M68: 40,993,706 km (0.109 R)
• M69: 43,283,601 km (0.054 R)
• M70: 45,266,820 km (0.102 R)
• M71: 45,614,784 km (0.105 R)
• M72: 46,225,742 km (0.066 R)
• M73: 46,488,436 km (0.069 R)
• M74: 47,367,772 km (0.07 R)
• M75: 47,632,560 km (0.097 R)
• M76: 49,858,577 km (0.08 R)
• M77: 54,226,535 km (0.096 R)
• M78: 54,318,837 km (0.114 R)
• M79: 54,411,289 km (0.088 R)
• M80: 56,549,641 km (0.119 R)
• M81: 56,830,586 km (0.109 R)
• M82: 57,111,979 km (0.087 R)
• M83: 58,620,674 km (0.118 R)
• M84: 60,429,312 km (0.087 R)
• M85: 61,773,598 km (0.118 R)
• M86: 61,869,939 km (0.102 R)
• M87: 62,933,580 km (0.111 R)
• M88: 63,321,936 km (0.097 R)
• M89: 64,198,580 km (0.059 R)
• M90: 64,491,642 km (0.075 R)
• M91: 64,981,126 km (0.105 R)

Kuiper Belt

Range: 30 - 53 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 456 - 11,546 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit