🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.52 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.85

Radius: 1.71

Gravity: 1.32 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 0.44 AU - 0.6 AU

Year: 131 Days

Day: 46 Hours

Environment

Temp: 269 °C

Axial Tilt: 14 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 50,028,286 km

• M1: 40,092 km (0.067 R)

Planet 2 - Terrestrial

Semi-Major Axis: 2.82 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.63

Radius: 0.83

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.239

Orbit Range: 2.15 AU - 3.49 AU

Year: 1657 Days

Day: 27.2 Hours

Environment

Temp: -92 °C

Axial Tilt: 31.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 3.08 AU

Composition

Type: Inner System (Rocky)

A dense region of planetesimals and debris.

Boundary

Planet 3 - Terrestrial

Semi-Major Axis: 3.33 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.34

Radius: 1.41

Gravity: 1.18 G

Time & Orbit

Eccentricity (e): 0.113

Orbit Range: 2.95 AU - 3.71 AU

Year: 2126 Days

Day: 26.8 Hours

Environment

Temp: -96 °C

Axial Tilt: 37.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 50,028,286 km

• M1: 1,583,793 km (0.035 R)

Asteroid Belt

Center: 5.47 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 4 - Gas Giant

Semi-Major Axis: 7.6 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 759.6

Radius: 12.7

Gravity: 4.71 G

Time & Orbit

Eccentricity (e): 0.186

Orbit Range: 6.19 AU - 9.01 AU

Year: 7330 Days

Day: 6.5 Hours

Environment

Temp: -148 °C

Axial Tilt: 18.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 50,028,286 km

• M1: 239,207 km (0.114 R)
• M2: 377,286 km (0.102 R)
• M3: 503,696 km (0.074 R)
• M4: 648,208 km (0.038 R)
• M5: 870,360 km (0.118 R)
• M6: 1,136,046 km (0.102 R)
• M7: 1,260,811 km (0.109 R)
• M8: 1,447,509 km (0.112 R)
• M9: 1,848,880 km (0.116 R)
• M10: 2,041,113 km (0.056 R)
• M11: 2,239,929 km (0.059 R)
• M12: 2,376,213 km (0.111 R)
• M13: 2,826,203 km (0.099 R)
• M14: 2,998,839 km (0.079 R)
• M15: 3,099,069 km (0.105 R)
• M16: 3,303,121 km (0.091 R)
• M17: 3,511,511 km (0.057 R)
• M18: 3,617,426 km (0.092 R)
• M19: 3,724,389 km (0.101 R)
• M20: 3,805,321 km (0.119 R)
• M21: 4,163,010 km (0.079 R)
• M22: 4,647,407 km (0.08 R)
• M23: 5,000,159 km (0.109 R)
• M24: 5,638,493 km (0.112 R)
• M25: 5,731,842 km (0.03 R)
• M26: 5,825,790 km (0.06 R)
• M27: 6,110,325 km (0.049 R)
• M28: 6,270,544 km (0.034 R)
• M29: 6,759,430 km (0.097 R)
• M30: 7,498,743 km (0.082 R)
• M31: 7,635,924 km (0.106 R)
• M32: 7,878,123 km (0.075 R)
• M33: 8,193,176 km (0.115 R)
• M34: 8,405,605 km (0.104 R)
• M35: 8,583,926 km (0.041 R)
• M36: 8,763,593 km (0.097 R)
• M37: 9,346,875 km (0.059 R)
• M38: 9,717,878 km (0.055 R)
• M39: 10,359,653 km (0.05 R)
• M40: 11,525,768 km (0.086 R)
• M41: 12,124,309 km (0.103 R)
• M42: 12,447,740 km (0.069 R)
• M43: 12,896,982 km (0.029 R)
• M44: 13,227,145 km (0.107 R)
• M45: 13,769,736 km (0.105 R)
• M46: 15,006,013 km (0.102 R)
• M47: 15,923,347 km (0.091 R)
• M48: 16,813,903 km (0.12 R)
• M49: 18,457,535 km (0.074 R)
• M50: 19,157,503 km (0.077 R)
• M51: 19,913,571 km (0.078 R)
• M52: 20,727,683 km (0.1 R)
• M53: 22,339,001 km (0.11 R)
• M54: 23,034,631 km (0.115 R)
• M55: 23,234,793 km (0.057 R)
• M56: 23,435,404 km (0.108 R)
• M57: 23,636,763 km (0.088 R)
• M58: 24,193,117 km (0.105 R)
• M59: 24,498,447 km (0.057 R)
• M60: 24,804,973 km (0.061 R)
• M61: 26,148,212 km (0.092 R)
• M62: 26,304,841 km (0.118 R)
• M63: 26,881,391 km (0.048 R)
• M64: 27,940,245 km (0.111 R)
• M65: 28,153,721 km (0.036 R)
• M66: 28,421,351 km (0.072 R)
• M67: 28,743,436 km (0.119 R)
• M68: 29,229,030 km (0.069 R)
• M69: 29,935,282 km (0.035 R)
• M70: 30,317,804 km (0.073 R)
• M71: 30,647,069 km (0.093 R)
• M72: 31,641,745 km (0.082 R)
• M73: 32,534,844 km (0.108 R)
• M74: 33,210,129 km (0.115 R)
• M75: 34,003,895 km (0.088 R)
• M76: 36,015,388 km (0.071 R)
• M77: 36,364,101 km (0.119 R)
• M78: 37,123,310 km (0.096 R)
• M79: 37,358,029 km (0.055 R)
• M80: 37,711,080 km (0.081 R)
• M81: 37,828,963 km (0.085 R)
• M82: 37,946,996 km (0.07 R)
• M83: 38,420,324 km (0.083 R)

Planet 5 - Gas Giant

Semi-Major Axis: 7.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 101.8

Radius: 10.1

Gravity: 1 G

Time & Orbit

Eccentricity (e): 0.009

Orbit Range: 7.79 AU - 7.93 AU

Year: 7709 Days

Day: 7.8 Hours

Environment

Temp: -165 °C

Axial Tilt: 37.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (53)

Outer Limit: 50,028,286 km

• M1: 135,536 km (0.107 R)
• M2: 252,820 km (0.085 R)
• M3: 334,950 km (0.075 R)
• M4: 518,656 km (0.068 R)
• M5: 756,816 km (0.034 R)
• M6: 996,771 km (0.105 R)
• M7: 1,249,142 km (0.081 R)
• M8: 1,639,293 km (0.12 R)
• M9: 1,732,643 km (0.1 R)
• M10: 1,827,936 km (0.111 R)
• M11: 1,981,125 km (0.118 R)
• M12: 2,080,906 km (0.119 R)
• M13: 2,167,823 km (0.112 R)
• M14: 2,466,420 km (0.07 R)
• M15: 2,543,164 km (0.05 R)
• M16: 3,320,474 km (0.084 R)
• M17: 3,682,501 km (0.116 R)
• M18: 3,841,673 km (0.112 R)
• M19: 4,111,997 km (0.088 R)
• M20: 4,482,102 km (0.076 R)
• M21: 4,614,197 km (0.072 R)
• M22: 4,824,382 km (0.068 R)
• M23: 5,333,912 km (0.106 R)
• M24: 5,615,306 km (0.1 R)
• M25: 5,717,032 km (0.05 R)
• M26: 6,276,977 km (0.105 R)
• M27: 6,724,723 km (0.055 R)
• M28: 6,832,733 km (0.117 R)
• M29: 7,877,225 km (0.026 R)
• M30: 8,174,925 km (0.07 R)
• M31: 9,378,291 km (0.083 R)
• M32: 9,547,635 km (0.096 R)
• M33: 10,062,252 km (0.106 R)
• M34: 10,161,286 km (0.09 R)
• M35: 10,335,418 km (0.098 R)
• M36: 10,863,648 km (0.117 R)
• M37: 11,426,435 km (0.106 R)
• M38: 11,946,437 km (0.036 R)
• M39: 12,821,136 km (0.083 R)
• M40: 13,144,417 km (0.08 R)
• M41: 13,936,538 km (0.097 R)
• M42: 14,213,294 km (0.077 R)
• M43: 15,167,878 km (0.058 R)
• M44: 16,521,439 km (0.094 R)
• M45: 17,494,573 km (0.069 R)
• M46: 17,673,642 km (0.113 R)
• M47: 17,763,251 km (0.084 R)
• M48: 18,365,233 km (0.113 R)
• M49: 18,456,039 km (0.114 R)
• M50: 18,943,279 km (0.101 R)
• M51: 19,035,132 km (0.088 R)
• M52: 19,373,074 km (0.114 R)
• M53: 20,179,706 km (0.094 R)

Planet 6 - Gas Giant

Semi-Major Axis: 9.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 933.4

Radius: 8.7

Gravity: 12.33 G

Time & Orbit

Eccentricity (e): 0.083

Orbit Range: 8.85 AU - 10.45 AU

Year: 10487 Days

Day: 11.8 Hours

Environment

Temp: -164 °C

Axial Tilt: 27.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 50,028,286 km

• M1: 274,811 km (0.065 R)
• M2: 436,377 km (0.11 R)
• M3: 1,685,968 km (0.037 R)
• M4: 1,865,485 km (0.093 R)
• M5: 2,498,584 km (0.11 R)
• M6: 2,556,777 km (0.107 R)
• M7: 2,703,832 km (0.118 R)
• M8: 3,006,768 km (0.116 R)
• M9: 3,162,200 km (0.108 R)
• M10: 4,116,036 km (0.115 R)
• M11: 4,254,115 km (0.094 R)
• M12: 4,429,144 km (0.111 R)
• M13: 4,786,085 km (0.12 R)
• M14: 5,264,050 km (0.114 R)
• M15: 5,718,827 km (0.058 R)
• M16: 5,873,212 km (0.073 R)
• M17: 6,265,308 km (0.107 R)
• M18: 6,625,540 km (0.072 R)
• M19: 6,787,854 km (0.028 R)
• M20: 6,869,385 km (0.081 R)
• M21: 7,366,050 km (0.081 R)
• M22: 7,576,384 km (0.084 R)
• M23: 7,661,057 km (0.114 R)
• M24: 7,831,449 km (0.086 R)
• M25: 8,046,121 km (0.054 R)
• M26: 8,306,422 km (0.085 R)
• M27: 9,239,015 km (0.111 R)
• M28: 9,465,955 km (0.079 R)
• M29: 9,557,210 km (0.091 R)
• M30: 10,628,181 km (0.106 R)
• M31: 13,033,565 km (0.119 R)
• M32: 13,441,668 km (0.115 R)
• M33: 13,544,442 km (0.094 R)
• M34: 14,532,984 km (0.034 R)
• M35: 15,062,710 km (0.117 R)
• M36: 16,140,862 km (0.088 R)
• M37: 16,414,327 km (0.11 R)
• M38: 16,689,288 km (0.083 R)
• M39: 16,799,691 km (0.057 R)
• M40: 17,691,743 km (0.113 R)
• M41: 18,885,834 km (0.109 R)
• M42: 19,579,818 km (0.052 R)
• M43: 19,754,698 km (0.066 R)
• M44: 19,813,041 km (0.119 R)
• M45: 20,047,162 km (0.101 R)
• M46: 20,223,388 km (0.032 R)
• M47: 21,052,310 km (0.117 R)
• M48: 21,171,689 km (0.08 R)
• M49: 22,255,825 km (0.116 R)
• M50: 22,682,328 km (0.111 R)
• M51: 22,866,035 km (0.118 R)
• M52: 24,540,633 km (0.052 R)
• M53: 24,981,199 km (0.115 R)
• M54: 26,511,585 km (0.032 R)
• M55: 27,548,597 km (0.085 R)
• M56: 27,613,822 km (0.047 R)
• M57: 28,006,517 km (0.114 R)
• M58: 28,532,951 km (0.076 R)
• M59: 28,929,835 km (0.059 R)
• M60: 29,195,520 km (0.091 R)
• M61: 29,261,942 km (0.093 R)
• M62: 31,349,580 km (0.118 R)
• M63: 32,101,758 km (0.081 R)
• M64: 32,514,648 km (0.12 R)
• M65: 32,583,613 km (0.091 R)
• M66: 35,169,711 km (0.037 R)
• M67: 35,240,471 km (0.11 R)
• M68: 35,737,435 km (0.087 R)
• M69: 36,236,793 km (0.072 R)
• M70: 36,810,202 km (0.098 R)
• M71: 37,098,028 km (0.087 R)
• M72: 37,531,263 km (0.03 R)
• M73: 38,767,690 km (0.113 R)
• M74: 39,207,358 km (0.07 R)
• M75: 39,501,318 km (0.119 R)
• M76: 41,429,934 km (0.098 R)
• M77: 41,879,326 km (0.094 R)
• M78: 42,481,158 km (0.062 R)
• M79: 43,389,067 km (0.083 R)
• M80: 44,686,380 km (0.119 R)
• M81: 45,378,270 km (0.103 R)
• M82: 45,996,259 km (0.059 R)
• M83: 46,694,881 km (0.117 R)
• M84: 47,475,183 km (0.1 R)
• M85: 48,024,058 km (0.052 R)
• M86: 48,496,039 km (0.119 R)
• M87: 49,207,078 km (0.077 R)
• M88: 49,682,949 km (0.119 R)
• M89: 51,200,170 km (0.115 R)
• M90: 51,601,841 km (0.095 R)
• M91: 52,246,907 km (0.111 R)
• M92: 52,975,748 km (0.092 R)

Planet 7 - Gas Giant

Semi-Major Axis: 12.21 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 561.8

Radius: 9.5

Gravity: 6.22 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 10.27 AU - 14.15 AU

Year: 14926 Days

Day: 9.3 Hours

Environment

Temp: -177 °C

Axial Tilt: 45.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 50,028,286 km

• M1: 225,594 km (0.056 R)
• M2: 335,548 km (0.097 R)
• M3: 468,690 km (0.109 R)
• M4: 914,043 km (0.105 R)
• M5: 1,087,277 km (0.062 R)
• M6: 1,541,905 km (0.102 R)
• M7: 2,079,560 km (0.034 R)
• M8: 2,549,148 km (0.113 R)
• M9: 2,610,184 km (0.069 R)
• M10: 3,019,035 km (0.115 R)
• M11: 3,116,273 km (0.061 R)
• M12: 3,380,613 km (0.108 R)
• M13: 3,860,971 km (0.057 R)
• M14: 4,037,796 km (0.109 R)
• M15: 4,362,872 km (0.072 R)
• M16: 4,621,527 km (0.083 R)
• M17: 4,885,268 km (0.118 R)
• M18: 5,115,350 km (0.056 R)
• M19: 5,192,841 km (0.046 R)
• M20: 6,568,992 km (0.082 R)
• M21: 7,472,264 km (0.117 R)
• M22: 8,782,891 km (0.079 R)
• M23: 8,875,941 km (0.094 R)
• M24: 9,393,400 km (0.071 R)
• M25: 10,114,611 km (0.041 R)
• M26: 10,605,442 km (0.106 R)
• M27: 11,103,902 km (0.096 R)
• M28: 11,204,581 km (0.027 R)
• M29: 11,559,128 km (0.079 R)
• M30: 11,661,154 km (0.07 R)
• M31: 12,961,309 km (0.099 R)
• M32: 13,067,374 km (0.062 R)
• M33: 13,280,252 km (0.098 R)
• M34: 13,440,621 km (0.044 R)
• M35: 14,471,350 km (0.109 R)
• M36: 16,838,886 km (0.115 R)
• M37: 17,128,657 km (0.116 R)
• M38: 18,304,197 km (0.11 R)
• M39: 20,177,462 km (0.115 R)
• M40: 20,485,184 km (0.115 R)
• M41: 21,480,609 km (0.12 R)
• M42: 22,428,162 km (0.085 R)
• M43: 22,491,741 km (0.086 R)
• M44: 24,691,577 km (0.115 R)
• M45: 26,151,054 km (0.068 R)
• M46: 26,218,074 km (0.103 R)
• M47: 27,298,021 km (0.061 R)
• M48: 28,323,664 km (0.099 R)
• M49: 28,875,830 km (0.119 R)
• M50: 29,222,598 km (0.092 R)
• M51: 30,131,106 km (0.098 R)
• M52: 30,765,401 km (0.099 R)
• M53: 31,048,739 km (0.098 R)
• M54: 31,261,766 km (0.088 R)
• M55: 31,832,333 km (0.083 R)
• M56: 32,550,402 km (0.085 R)
• M57: 32,622,508 km (0.029 R)
• M58: 34,589,122 km (0.115 R)
• M59: 34,883,830 km (0.11 R)
• M60: 36,219,888 km (0.119 R)
• M61: 37,044,622 km (0.118 R)
• M62: 37,497,005 km (0.094 R)
• M63: 38,255,317 km (0.112 R)
• M64: 39,018,565 km (0.119 R)
• M65: 39,786,750 km (0.061 R)
• M66: 40,095,521 km (0.089 R)
• M67: 40,560,022 km (0.107 R)
• M68: 40,870,737 km (0.088 R)
• M69: 42,514,817 km (0.107 R)
• M70: 44,500,131 km (0.109 R)
• M71: 44,981,088 km (0.055 R)
• M72: 46,109,953 km (0.087 R)
• M73: 47,003,501 km (0.112 R)
• M74: 47,575,115 km (0.053 R)
• M75: 48,395,659 km (0.087 R)
• M76: 51,556,213 km (0.083 R)
• M77: 51,808,585 km (0.1 R)
• M78: 53,331,342 km (0.072 R)
• M79: 53,842,218 km (0.118 R)
• M80: 53,927,489 km (0.096 R)
• M81: 55,988,200 km (0.103 R)
• M82: 56,247,603 km (0.101 R)
• M83: 57,028,055 km (0.117 R)
• M84: 57,289,103 km (0.055 R)
• M85: 57,376,169 km (0.111 R)
• M86: 57,724,882 km (0.101 R)
• M87: 57,812,247 km (0.071 R)
• M88: 57,986,977 km (0.071 R)
• M89: 58,512,215 km (0.071 R)

Planet 8 - Gas Giant

Semi-Major Axis: 13.16 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 279.2

Radius: 9.1

Gravity: 3.37 G

Time & Orbit

Eccentricity (e): 0.019

Orbit Range: 12.91 AU - 13.41 AU

Year: 16702 Days

Day: 6.5 Hours

Environment

Temp: -176 °C

Axial Tilt: 38.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 50,028,286 km

• M1: 233,672 km (0.031 R)
• M2: 426,055 km (0.037 R)
• M3: 671,246 km (0.097 R)
• M4: 902,524 km (0.063 R)
• M5: 959,521 km (0.075 R)
• M6: 1,416,243 km (0.084 R)
• M7: 1,835,865 km (0.068 R)
• M8: 2,784,166 km (0.048 R)
• M9: 3,893,285 km (0.104 R)
• M10: 4,214,471 km (0.108 R)
• M11: 4,444,403 km (0.119 R)
• M12: 4,951,091 km (0.095 R)
• M13: 5,020,056 km (0.084 R)
• M14: 5,263,900 km (0.116 R)
• M15: 5,334,211 km (0.099 R)
• M16: 5,511,634 km (0.108 R)
• M17: 5,799,461 km (0.114 R)
• M18: 5,945,319 km (0.081 R)
• M19: 6,203,375 km (0.087 R)
• M20: 6,277,875 km (0.09 R)
• M21: 6,540,718 km (0.104 R)
• M22: 6,961,088 km (0.11 R)
• M23: 7,429,629 km (0.115 R)
• M24: 7,508,766 km (0.116 R)
• M25: 8,937,874 km (0.119 R)
• M26: 9,191,144 km (0.117 R)
• M27: 9,532,676 km (0.109 R)
• M28: 9,834,863 km (0.12 R)
• M29: 10,096,360 km (0.118 R)
• M30: 10,360,251 km (0.104 R)
• M31: 10,894,764 km (0.095 R)
• M32: 11,120,208 km (0.12 R)
• M33: 11,392,775 km (0.039 R)
• M34: 12,223,492 km (0.045 R)
• M35: 12,457,763 km (0.076 R)
• M36: 12,646,256 km (0.043 R)
• M37: 12,788,224 km (0.057 R)
• M38: 13,313,313 km (0.086 R)
• M39: 14,384,583 km (0.107 R)
• M40: 15,635,221 km (0.074 R)
• M41: 15,889,538 km (0.111 R)
• M42: 16,094,038 km (0.042 R)
• M43: 17,496,817 km (0.064 R)
• M44: 17,919,880 km (0.114 R)
• M45: 18,507,201 km (0.107 R)
• M46: 18,830,183 km (0.077 R)
• M47: 19,372,775 km (0.098 R)
• M48: 19,591,188 km (0.098 R)
• M49: 19,865,400 km (0.072 R)
• M50: 20,306,714 km (0.072 R)
• M51: 21,030,917 km (0.066 R)
• M52: 22,561,752 km (0.057 R)
• M53: 22,734,089 km (0.115 R)
• M54: 25,073,052 km (0.059 R)
• M55: 25,789,626 km (0.111 R)
• M56: 26,452,344 km (0.095 R)
• M57: 26,512,782 km (0.116 R)
• M58: 26,755,430 km (0.066 R)
• M59: 30,735,481 km (0.116 R)
• M60: 32,988,874 km (0.053 R)
• M61: 34,498,615 km (0.046 R)
• M62: 34,829,675 km (0.064 R)
• M63: 36,232,155 km (0.117 R)
• M64: 36,974,011 km (0.037 R)
• M65: 37,584,819 km (0.114 R)
• M66: 37,720,953 km (0.084 R)
• M67: 38,198,919 km (0.119 R)
• M68: 38,885,124 km (0.068 R)
• M69: 38,953,939 km (0.059 R)
• M70: 39,022,754 km (0.083 R)
• M71: 39,091,719 km (0.072 R)
• M72: 39,229,648 km (0.082 R)
• M73: 39,991,550 km (0.067 R)
• M74: 40,200,089 km (0.039 R)
• M75: 41,248,471 km (0.053 R)
• M76: 41,529,715 km (0.071 R)
• M77: 41,881,869 km (0.12 R)
• M78: 42,731,435 km (0.075 R)
• M79: 43,015,821 km (0.037 R)
• M80: 44,159,945 km (0.078 R)
• M81: 46,040,241 km (0.059 R)
• M82: 46,404,811 km (0.078 R)
• M83: 46,916,884 km (0.094 R)
• M84: 47,504,355 km (0.115 R)
• M85: 47,946,566 km (0.117 R)

Kuiper Belt

Range: 31.4 - 46.4 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 493 - 19,187 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit