🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.57 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.31

Radius: 1.4

Gravity: 1.18 G

Time & Orbit

Eccentricity (e): 0.058

Orbit Range: 0.54 AU - 0.6 AU

Year: 166 Days

Day: 45.7 Hours

Environment

Temp: 159 °C

Axial Tilt: 37.2 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.84 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.4

Radius: 1.63

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.083

Orbit Range: 0.77 AU - 0.91 AU

Year: 296 Days

Day: 38.2 Hours

Environment

Temp: 19 °C

Axial Tilt: 17.7 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (2)

Outer Limit: 86,891,211 km

• M1: 597,344 km (0.114 R)
• M2: 748,737 km (0.113 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.15 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.46

Radius: 0.73

Gravity: 0.86 G

Time & Orbit

Eccentricity (e): 0.093

Orbit Range: 1.04 AU - 1.26 AU

Year: 475 Days

Day: 14.1 Hours

Environment

Temp: -24 °C

Axial Tilt: 47.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 1.49 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.05

Radius: 1.33

Gravity: 1.16 G

Time & Orbit

Eccentricity (e): 0.178

Orbit Range: 1.22 AU - 1.76 AU

Year: 700 Days

Day: 44.6 Hours

Environment

Temp: -64 °C

Axial Tilt: 41.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 5.22 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 969.8

Radius: 11.5

Gravity: 7.33 G

Time & Orbit

Eccentricity (e): 0.178

Orbit Range: 4.29 AU - 6.15 AU

Year: 4592 Days

Day: 6.1 Hours

Environment

Temp: -146 °C

Axial Tilt: 19.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 86,891,211 km

• M1: 161,715 km (0.091 R)
• M2: 369,956 km (0.107 R)
• M3: 467,942 km (0.105 R)
• M4: 588,518 km (0.091 R)
• M5: 671,545 km (0.097 R)
• M6: 1,259,165 km (0.029 R)
• M7: 1,386,772 km (0.085 R)
• M8: 1,569,431 km (0.104 R)
• M9: 1,813,575 km (0.118 R)
• M10: 2,014,335 km (0.119 R)
• M11: 2,338,963 km (0.061 R)
• M12: 2,437,847 km (0.057 R)
• M13: 2,784,166 km (0.093 R)
• M14: 2,931,520 km (0.097 R)
• M15: 3,146,492 km (0.105 R)
• M16: 3,501,338 km (0.116 R)
• M17: 3,729,774 km (0.097 R)
• M18: 3,939,660 km (0.065 R)
• M19: 4,034,056 km (0.118 R)
• M20: 4,201,456 km (0.071 R)
• M21: 5,020,804 km (0.105 R)
• M22: 5,123,428 km (0.066 R)
• M23: 5,226,800 km (0.107 R)
• M24: 5,330,920 km (0.106 R)
• M25: 6,243,617 km (0.101 R)
• M26: 6,493,445 km (0.048 R)
• M27: 6,605,494 km (0.098 R)
• M28: 6,831,536 km (0.117 R)
• M29: 7,088,994 km (0.111 R)
• M30: 8,885,515 km (0.04 R)
• M31: 9,135,344 km (0.074 R)
• M32: 9,578,153 km (0.071 R)
• M33: 9,673,896 km (0.073 R)
• M34: 9,930,905 km (0.098 R)
• M35: 10,517,329 km (0.12 R)
• M36: 11,350,738 km (0.113 R)
• M37: 11,689,877 km (0.11 R)
• M38: 12,067,013 km (0.098 R)
• M39: 12,517,751 km (0.106 R)
• M40: 12,657,625 km (0.049 R)
• M41: 12,797,948 km (0.063 R)
• M42: 12,903,564 km (0.108 R)
• M43: 13,151,149 km (0.1 R)
• M44: 13,794,868 km (0.073 R)
• M45: 14,011,785 km (0.091 R)
• M46: 14,339,255 km (0.088 R)
• M47: 15,001,824 km (0.066 R)
• M48: 15,448,972 km (0.101 R)
• M49: 15,976,305 km (0.096 R)
• M50: 16,128,146 km (0.087 R)
• M51: 16,280,287 km (0.071 R)
• M52: 16,662,959 km (0.049 R)
• M53: 17,515,367 km (0.033 R)
• M54: 17,750,386 km (0.099 R)
• M55: 17,828,925 km (0.11 R)
• M56: 19,141,496 km (0.107 R)
• M57: 19,993,007 km (0.058 R)
• M58: 21,230,930 km (0.087 R)
• M59: 21,775,017 km (0.109 R)
• M60: 22,620,993 km (0.045 R)
• M61: 23,133,815 km (0.117 R)
• M62: 23,434,806 km (0.103 R)
• M63: 23,780,227 km (0.103 R)
• M64: 23,953,611 km (0.036 R)
• M65: 24,083,911 km (0.077 R)
• M66: 24,258,043 km (0.026 R)
• M67: 25,178,967 km (0.109 R)
• M68: 25,577,197 km (0.098 R)
• M69: 26,022,101 km (0.092 R)
• M70: 26,919,688 km (0.069 R)
• M71: 28,330,695 km (0.099 R)
• M72: 28,514,551 km (0.116 R)
• M73: 29,253,864 km (0.082 R)
• M74: 29,439,664 km (0.105 R)
• M75: 29,532,714 km (0.084 R)
• M76: 29,672,438 km (0.11 R)
• M77: 29,765,788 km (0.114 R)
• M78: 30,562,845 km (0.12 R)
• M79: 31,082,249 km (0.094 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.66 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 393.2

Radius: 12.2

Gravity: 2.64 G

Time & Orbit

Eccentricity (e): 0.023

Orbit Range: 5.53 AU - 5.79 AU

Year: 5184 Days

Day: 14.8 Hours

Environment

Temp: -164 °C

Axial Tilt: 42.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (61)

Outer Limit: 86,891,211 km

• M1: 152,590 km (0.055 R)
• M2: 229,483 km (0.075 R)
• M3: 311,912 km (0.068 R)
• M4: 428,897 km (0.063 R)
• M5: 575,204 km (0.107 R)
• M6: 853,306 km (0.103 R)
• M7: 972,087 km (0.109 R)
• M8: 1,135,448 km (0.096 R)
• M9: 1,254,229 km (0.112 R)
• M10: 1,490,444 km (0.087 R)
• M11: 1,666,221 km (0.115 R)
• M12: 1,927,269 km (0.093 R)
• M13: 2,022,713 km (0.069 R)
• M14: 2,576,075 km (0.076 R)
• M15: 2,915,662 km (0.064 R)
• M16: 3,539,785 km (0.054 R)
• M17: 4,908,605 km (0.098 R)
• M18: 5,330,471 km (0.066 R)
• M19: 5,580,150 km (0.099 R)
• M20: 5,671,854 km (0.107 R)
• M21: 6,424,032 km (0.116 R)
• M22: 7,058,327 km (0.1 R)
• M23: 7,207,625 km (0.108 R)
• M24: 7,357,822 km (0.037 R)
• M25: 8,890,751 km (0.082 R)
• M26: 9,025,090 km (0.084 R)
• M27: 9,569,477 km (0.09 R)
• M28: 9,734,782 km (0.102 R)
• M29: 9,817,809 km (0.096 R)
• M30: 10,012,585 km (0.053 R)
• M31: 10,349,330 km (0.089 R)
• M32: 10,947,722 km (0.108 R)
• M33: 11,207,573 km (0.12 R)
• M34: 11,323,811 km (0.103 R)
• M35: 12,507,579 km (0.102 R)
• M36: 12,688,443 km (0.101 R)
• M37: 12,779,249 km (0.077 R)
• M38: 13,205,902 km (0.112 R)
• M39: 14,010,738 km (0.071 R)
• M40: 14,735,839 km (0.115 R)
• M41: 15,408,730 km (0.116 R)
• M42: 15,667,684 km (0.087 R)
• M43: 15,895,372 km (0.085 R)
• M44: 16,917,425 km (0.047 R)
• M45: 17,385,816 km (0.059 R)
• M46: 17,621,732 km (0.115 R)
• M47: 19,128,332 km (0.094 R)
• M48: 19,511,601 km (0.101 R)
• M49: 19,686,481 km (0.092 R)
• M50: 19,967,576 km (0.102 R)
• M51: 20,250,017 km (0.111 R)
• M52: 20,427,140 km (0.103 R)
• M53: 20,533,804 km (0.114 R)
• M54: 20,997,707 km (0.091 R)
• M55: 21,105,118 km (0.118 R)
• M56: 21,718,020 km (0.093 R)
• M57: 21,972,187 km (0.079 R)
• M58: 22,483,214 km (0.053 R)
• M59: 23,703,483 km (0.084 R)
• M60: 24,755,755 km (0.045 R)
• M61: 25,325,723 km (0.096 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 241.2

Radius: 8.2

Gravity: 3.59 G

Time & Orbit

Eccentricity (e): 0.016

Orbit Range: 6.75 AU - 6.97 AU

Year: 6918 Days

Day: 9.7 Hours

Environment

Temp: -156 °C

Axial Tilt: 20.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 86,891,211 km

• M1: 102,774 km (0.071 R)
• M2: 353,799 km (0.114 R)
• M3: 539,001 km (0.111 R)
• M4: 622,178 km (0.079 R)
• M5: 1,295,518 km (0.051 R)
• M6: 1,869,525 km (0.116 R)
• M7: 2,049,192 km (0.043 R)
• M8: 2,372,921 km (0.074 R)
• M9: 2,531,944 km (0.072 R)
• M10: 2,804,810 km (0.088 R)
• M11: 2,860,610 km (0.105 R)
• M12: 2,916,710 km (0.04 R)
• M13: 3,106,400 km (0.118 R)
• M14: 3,241,636 km (0.03 R)
• M15: 3,822,525 km (0.043 R)
• M16: 4,135,633 km (0.108 R)
• M17: 4,284,633 km (0.083 R)
• M18: 4,370,651 km (0.049 R)
• M19: 4,588,017 km (0.069 R)
• M20: 4,764,543 km (0.069 R)
• M21: 5,727,504 km (0.108 R)
• M22: 5,822,200 km (0.111 R)
• M23: 6,085,641 km (0.042 R)
• M24: 7,564,267 km (0.058 R)
• M25: 7,825,465 km (0.092 R)
• M26: 8,089,654 km (0.109 R)
• M27: 8,464,397 km (0.09 R)
• M28: 8,626,860 km (0.066 R)
• M29: 8,790,221 km (0.119 R)
• M30: 8,982,155 km (0.084 R)
• M31: 9,398,187 km (0.068 R)
• M32: 9,848,925 km (0.061 R)
• M33: 10,393,162 km (0.102 R)
• M34: 10,625,338 km (0.077 R)
• M35: 10,742,025 km (0.084 R)
• M36: 10,947,273 km (0.074 R)
• M37: 11,841,719 km (0.12 R)
• M38: 12,114,585 km (0.06 R)
• M39: 12,175,621 km (0.12 R)
• M40: 12,328,361 km (0.074 R)
• M41: 12,512,516 km (0.116 R)
• M42: 13,039,250 km (0.059 R)
• M43: 13,541,599 km (0.101 R)
• M44: 13,668,159 km (0.064 R)
• M45: 13,795,168 km (0.096 R)
• M46: 13,986,354 km (0.07 R)
• M47: 14,436,045 km (0.051 R)
• M48: 14,532,984 km (0.058 R)
• M49: 14,630,073 km (0.045 R)
• M50: 14,988,360 km (0.087 R)
• M51: 15,448,374 km (0.111 R)
• M52: 15,646,890 km (0.085 R)
• M53: 15,713,312 km (0.085 R)
• M54: 17,782,699 km (0.104 R)
• M55: 17,990,790 km (0.078 R)
• M56: 18,339,502 km (0.082 R)
• M57: 19,185,478 km (0.051 R)
• M58: 19,398,954 km (0.077 R)
• M59: 19,756,643 km (0.045 R)
• M60: 19,936,160 km (0.081 R)
• M61: 20,044,170 km (0.094 R)
• M62: 20,550,858 km (0.057 R)
• M63: 20,842,275 km (0.052 R)
• M64: 20,915,428 km (0.097 R)
• M65: 20,988,581 km (0.091 R)
• M66: 21,098,386 km (0.099 R)
• M67: 21,171,839 km (0.079 R)
• M68: 21,355,545 km (0.111 R)
• M69: 21,836,053 km (0.097 R)
• M70: 22,096,054 km (0.108 R)
• M71: 22,544,399 km (0.108 R)
• M72: 22,995,736 km (0.064 R)
• M73: 23,298,372 km (0.113 R)
• M74: 23,678,351 km (0.099 R)
• M75: 23,754,646 km (0.077 R)
• M76: 24,175,614 km (0.096 R)
• M77: 24,406,145 km (0.101 R)
• M78: 25,922,917 km (0.115 R)
• M79: 26,001,456 km (0.072 R)

Planet 8 - Gas Giant

Semi-Major Axis: 7.17 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 526.8

Radius: 9.7

Gravity: 5.6 G

Time & Orbit

Eccentricity (e): 0.232

Orbit Range: 5.51 AU - 8.83 AU

Year: 7392 Days

Day: 6.3 Hours

Environment

Temp: -167 °C

Axial Tilt: 37.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 86,891,211 km

• M1: 146,307 km (0.067 R)
• M2: 354,996 km (0.095 R)
• M3: 620,382 km (0.097 R)
• M4: 769,232 km (0.096 R)
• M5: 1,007,392 km (0.106 R)
• M6: 1,664,127 km (0.119 R)
• M7: 1,740,122 km (0.104 R)
• M8: 1,915,152 km (0.063 R)
• M9: 2,304,106 km (0.065 R)
• M10: 2,628,584 km (0.101 R)
• M11: 2,740,035 km (0.101 R)
• M12: 2,944,684 km (0.04 R)
• M13: 3,154,421 km (0.111 R)
• M14: 3,441,798 km (0.048 R)
• M15: 3,564,020 km (0.079 R)
• M16: 4,301,388 km (0.118 R)
• M17: 4,433,183 km (0.091 R)
• M18: 4,647,108 km (0.051 R)
• M19: 5,365,328 km (0.052 R)
• M20: 5,536,019 km (0.117 R)
• M21: 5,737,527 km (0.081 R)
• M22: 6,177,345 km (0.097 R)
• M23: 6,688,970 km (0.059 R)
• M24: 6,780,673 km (0.119 R)
• M25: 7,027,360 km (0.089 R)
• M26: 7,089,593 km (0.089 R)
• M27: 7,657,017 km (0.118 R)
• M28: 8,337,389 km (0.119 R)
• M29: 8,768,380 km (0.045 R)
• M30: 9,411,352 km (0.071 R)
• M31: 9,583,090 km (0.068 R)
• M32: 9,964,565 km (0.113 R)
• M33: 10,280,366 km (0.037 R)
• M34: 10,350,976 km (0.091 R)
• M35: 10,563,854 km (0.113 R)
• M36: 11,211,164 km (0.038 R)
• M37: 11,797,438 km (0.104 R)
• M38: 11,871,339 km (0.081 R)
• M39: 12,506,532 km (0.105 R)
• M40: 13,114,348 km (0.068 R)
• M41: 13,383,325 km (0.105 R)
• M42: 13,537,710 km (0.098 R)
• M43: 14,240,371 km (0.09 R)
• M44: 14,437,691 km (0.101 R)
• M45: 14,795,080 km (0.106 R)
• M46: 14,994,943 km (0.111 R)
• M47: 15,437,752 km (0.07 R)
• M48: 15,640,457 km (0.085 R)
• M49: 16,253,809 km (0.072 R)
• M50: 17,042,040 km (0.1 R)
• M51: 17,125,815 km (0.109 R)
• M52: 17,673,193 km (0.117 R)
• M53: 17,842,837 km (0.056 R)
• M54: 17,927,809 km (0.106 R)
• M55: 18,742,070 km (0.092 R)
• M56: 18,958,239 km (0.069 R)
• M57: 19,306,054 km (0.114 R)
• M58: 20,941,757 km (0.087 R)
• M59: 22,621,442 km (0.114 R)
• M60: 22,897,899 km (0.097 R)
• M61: 23,407,728 km (0.088 R)
• M62: 23,500,778 km (0.087 R)
• M63: 23,874,324 km (0.089 R)
• M64: 25,723,653 km (0.072 R)
• M65: 26,060,398 km (0.098 R)
• M66: 27,471,106 km (0.114 R)
• M67: 27,716,895 km (0.065 R)
• M68: 27,864,698 km (0.101 R)
• M69: 28,210,568 km (0.092 R)
• M70: 28,408,785 km (0.113 R)
• M71: 28,657,267 km (0.1 R)
• M72: 28,956,463 km (0.081 R)
• M73: 30,112,855 km (0.045 R)
• M74: 30,214,132 km (0.088 R)
• M75: 30,518,564 km (0.062 R)
• M76: 30,875,056 km (0.076 R)
• M77: 31,592,228 km (0.091 R)
• M78: 32,470,517 km (0.12 R)
• M79: 32,782,429 km (0.109 R)
• M80: 33,147,597 km (0.049 R)
• M81: 33,566,471 km (0.054 R)
• M82: 33,671,489 km (0.09 R)
• M83: 34,251,031 km (0.091 R)
• M84: 34,568,478 km (0.106 R)
• M85: 35,366,433 km (0.054 R)
• M86: 35,473,395 km (0.085 R)
• M87: 35,633,914 km (0.037 R)
• M88: 35,741,026 km (0.106 R)

Planet 9 - Ice Giant

Semi-Major Axis: 14.41 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 920

Radius: 7.8

Gravity: 15.12 G

Time & Orbit

Eccentricity (e): 0.15

Orbit Range: 12.25 AU - 16.57 AU

Year: 21060 Days

Day: 15.1 Hours

Environment

Temp: -191 °C

Axial Tilt: 21.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 86,891,211 km

• M1: 211,083 km (0.108 R)
• M2: 361,129 km (0.12 R)
• M3: 525,687 km (0.093 R)
• M4: 714,779 km (0.064 R)
• M5: 1,067,381 km (0.045 R)
• M6: 1,186,162 km (0.091 R)
• M7: 1,247,197 km (0.069 R)
• M8: 1,309,430 km (0.07 R)
• M9: 2,024,209 km (0.111 R)
• M10: 2,440,390 km (0.062 R)
• M11: 2,558,572 km (0.059 R)
• M12: 2,800,622 km (0.1 R)
• M13: 3,704,941 km (0.119 R)
• M14: 4,692,287 km (0.099 R)
• M15: 5,038,755 km (0.065 R)
• M16: 5,444,764 km (0.119 R)
• M17: 7,003,275 km (0.102 R)
• M18: 7,172,021 km (0.076 R)
• M19: 7,228,569 km (0.055 R)
• M20: 7,342,114 km (0.099 R)
• M21: 7,570,849 km (0.051 R)
• M22: 7,918,365 km (0.078 R)
• M23: 8,509,276 km (0.088 R)
• M24: 9,298,555 km (0.052 R)
• M25: 11,870,292 km (0.101 R)
• M26: 12,409,443 km (0.089 R)
• M27: 13,441,817 km (0.05 R)
• M28: 14,430,061 km (0.052 R)
• M29: 14,716,840 km (0.112 R)
• M30: 14,933,009 km (0.074 R)
• M31: 15,368,638 km (0.076 R)
• M32: 17,152,593 km (0.079 R)
• M33: 17,228,289 km (0.101 R)
• M34: 17,304,135 km (0.041 R)
• M35: 17,761,606 km (0.114 R)
• M36: 20,268,118 km (0.111 R)
• M37: 20,992,770 km (0.11 R)
• M38: 21,480,609 km (0.092 R)
• M39: 21,562,139 km (0.117 R)
• M40: 21,972,038 km (0.112 R)
• M41: 27,175,650 km (0.094 R)
• M42: 29,051,009 km (0.08 R)
• M43: 32,174,612 km (0.097 R)
• M44: 35,017,870 km (0.113 R)
• M45: 36,372,029 km (0.095 R)
• M46: 37,841,978 km (0.054 R)
• M47: 41,041,877 km (0.101 R)
• M48: 42,161,766 km (0.079 R)
• M49: 42,571,515 km (0.113 R)
• M50: 44,327,495 km (0.1 R)
• M51: 44,535,585 km (0.103 R)
• M52: 45,371,389 km (0.089 R)
• M53: 45,896,477 km (0.102 R)
• M54: 47,270,982 km (0.033 R)
• M55: 47,909,915 km (0.117 R)
• M56: 48,230,354 km (0.111 R)
• M57: 49,088,596 km (0.036 R)
• M58: 50,929,099 km (0.1 R)
• M59: 51,256,270 km (0.075 R)
• M60: 52,681,788 km (0.088 R)
• M61: 52,902,295 km (0.114 R)
• M62: 53,233,654 km (0.103 R)
• M63: 55,123,973 km (0.065 R)
• M64: 56,810,091 km (0.111 R)
• M65: 58,741,399 km (0.12 R)
• M66: 60,232,890 km (0.106 R)
• M67: 61,736,648 km (0.09 R)
• M68: 63,252,822 km (0.116 R)
• M69: 64,074,264 km (0.062 R)
• M70: 64,545,348 km (0.099 R)
• M71: 65,017,479 km (0.104 R)
• M72: 65,727,769 km (0.082 R)
• M73: 66,083,962 km (0.083 R)
• M74: 67,634,693 km (0.111 R)
• M75: 68,835,665 km (0.052 R)
• M76: 70,407,490 km (0.04 R)
• M77: 71,624,618 km (0.098 R)
• M78: 73,094,417 km (0.114 R)
• M79: 73,586,445 km (0.079 R)
• M80: 75,069,408 km (0.09 R)
• M81: 75,690,239 km (0.073 R)
• M82: 76,437,481 km (0.036 R)
• M83: 76,562,245 km (0.106 R)
• M84: 77,437,543 km (0.075 R)
• M85: 78,693,716 km (0.109 R)
• M86: 81,098,950 km (0.094 R)
• M87: 82,758,589 km (0.106 R)
• M88: 84,945,710 km (0.113 R)
• M89: 85,074,963 km (0.051 R)
• M90: 85,463,020 km (0.1 R)
• M91: 85,851,824 km (0.062 R)
• M92: 86,111,227 km (0.101 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 389 - 15,457 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit