🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.74 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.66

Radius: 1.22

Gravity: 1.12 G

Time & Orbit

Eccentricity (e): 0.231

Orbit Range: 0.57 AU - 0.91 AU

Year: 233 Days

Day: 25.5 Hours

Environment

Temp: 200 °C

Axial Tilt: 23.6 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.11 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.03

Radius: 1.33

Gravity: 1.15 G

Time & Orbit

Eccentricity (e): 0.098

Orbit Range: 1 AU - 1.22 AU

Year: 427 Days

Day: 24.6 Hours

Environment

Temp: 14 °C

Axial Tilt: 35.4 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (1)

Outer Limit: 35,225,095 km

• M1: 486,343 km (0.111 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.53 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.62

Radius: 0.83

Gravity: 0.9 G

Time & Orbit

Eccentricity (e): 0.127

Orbit Range: 1.34 AU - 1.72 AU

Year: 691 Days

Day: 23.2 Hours

Environment

Temp: -46 °C

Axial Tilt: 23 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 2.62 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.55

Radius: 1.45

Gravity: 1.21 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 2.48 AU - 2.76 AU

Year: 1549 Days

Day: 39.1 Hours

Environment

Temp: -92 °C

Axial Tilt: 8.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 35,225,095 km

• M1: 1,266,196 km (0.111 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 762

Radius: 9.6

Gravity: 8.27 G

Time & Orbit

Eccentricity (e): 0.119

Orbit Range: 4.39 AU - 5.57 AU

Year: 4059 Days

Day: 8.8 Hours

Environment

Temp: -134 °C

Axial Tilt: 38.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 35,225,095 km

• M1: 142,567 km (0.096 R)
• M2: 459,565 km (0.05 R)
• M3: 537,954 km (0.052 R)
• M4: 767,587 km (0.108 R)
• M5: 1,288,786 km (0.029 R)
• M6: 1,725,911 km (0.115 R)
• M7: 2,311,437 km (0.09 R)
• M8: 2,417,801 km (0.053 R)
• M9: 2,544,061 km (0.091 R)
• M10: 2,897,561 km (0.096 R)
• M11: 2,974,155 km (0.085 R)
• M12: 3,569,106 km (0.054 R)
• M13: 3,630,591 km (0.056 R)
• M14: 3,692,524 km (0.109 R)
• M15: 3,880,419 km (0.092 R)
• M16: 3,943,699 km (0.105 R)
• M17: 4,071,456 km (0.092 R)
• M18: 4,265,634 km (0.059 R)
• M19: 4,529,225 km (0.11 R)
• M20: 4,618,385 km (0.103 R)
• M21: 4,685,555 km (0.07 R)
• M22: 4,798,352 km (0.054 R)
• M23: 5,003,600 km (0.111 R)
• M24: 5,446,260 km (0.065 R)
• M25: 5,708,505 km (0.113 R)
• M26: 5,804,846 km (0.074 R)
• M27: 5,974,789 km (0.064 R)
• M28: 6,319,612 km (0.098 R)
• M29: 6,645,736 km (0.084 R)
• M30: 6,823,608 km (0.089 R)
• M31: 7,210,019 km (0.115 R)
• M32: 7,445,336 km (0.07 R)
• M33: 8,004,384 km (0.066 R)
• M34: 8,549,219 km (0.089 R)
• M35: 9,389,062 km (0.05 R)
• M36: 9,617,498 km (0.096 R)
• M37: 10,372,518 km (0.086 R)
• M38: 10,490,401 km (0.047 R)
• M39: 10,578,963 km (0.067 R)
• M40: 11,297,482 km (0.115 R)
• M41: 11,601,464 km (0.065 R)
• M42: 12,000,741 km (0.091 R)
• M43: 12,404,506 km (0.052 R)
• M44: 12,498,304 km (0.034 R)
• M45: 12,844,324 km (0.116 R)
• M46: 13,385,419 km (0.061 R)
• M47: 13,449,597 km (0.104 R)
• M48: 13,642,578 km (0.079 R)
• M49: 14,358,254 km (0.065 R)
• M50: 14,621,546 km (0.036 R)
• M51: 15,052,687 km (0.112 R)
• M52: 15,219,639 km (0.078 R)
• M53: 15,353,678 km (0.077 R)
• M54: 15,454,507 km (0.114 R)
• M55: 15,521,826 km (0.115 R)
• M56: 15,859,768 km (0.103 R)
• M57: 16,784,582 km (0.097 R)
• M58: 17,445,804 km (0.115 R)
• M59: 17,586,127 km (0.059 R)
• M60: 17,903,125 km (0.092 R)
• M61: 18,542,806 km (0.072 R)
• M62: 18,973,498 km (0.052 R)
• M63: 19,117,860 km (0.118 R)
• M64: 19,298,724 km (0.071 R)
• M65: 19,480,186 km (0.046 R)
• M66: 19,771,603 km (0.057 R)
• M67: 20,395,874 km (0.066 R)
• M68: 20,580,777 km (0.109 R)
• M69: 20,691,929 km (0.119 R)
• M70: 21,776,812 km (0.048 R)
• M71: 22,193,143 km (0.064 R)
• M72: 22,269,139 km (0.11 R)
• M73: 22,726,909 km (0.1 R)
• M74: 23,149,223 km (0.091 R)
• M75: 24,157,812 km (0.093 R)
• M76: 24,706,687 km (0.078 R)
• M77: 25,101,476 km (0.056 R)
• M78: 25,378,980 km (0.048 R)
• M79: 25,856,945 km (0.117 R)
• M80: 25,936,980 km (0.09 R)
• M81: 26,378,293 km (0.119 R)
• M82: 26,458,777 km (0.099 R)
• M83: 26,620,044 km (0.081 R)

Asteroid Belt

Center: 5.32 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 6 - Gas Giant

Semi-Major Axis: 5.66 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 418

Radius: 13.2

Gravity: 2.4 G

Time & Orbit

Eccentricity (e): 0.216

Orbit Range: 4.44 AU - 6.88 AU

Year: 4918 Days

Day: 13.5 Hours

Environment

Temp: -143 °C

Axial Tilt: 20.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 35,225,095 km

• M1: 182,210 km (0.101 R)
• M2: 301,589 km (0.081 R)
• M3: 388,506 km (0.068 R)
• M4: 479,910 km (0.062 R)
• M5: 776,862 km (0.04 R)
• M6: 924,515 km (0.092 R)
• M7: 1,094,907 km (0.112 R)
• M8: 1,236,576 km (0.095 R)
• M9: 1,496,727 km (0.039 R)
• M10: 1,655,600 km (0.101 R)
• M11: 2,183,082 km (0.078 R)
• M12: 2,415,258 km (0.042 R)
• M13: 2,850,288 km (0.094 R)
• M14: 2,976,549 km (0.09 R)
• M15: 3,160,405 km (0.119 R)
• M16: 4,074,298 km (0.065 R)
• M17: 4,656,084 km (0.07 R)
• M18: 4,805,682 km (0.116 R)
• M19: 5,308,630 km (0.061 R)
• M20: 5,668,563 km (0.11 R)
• M21: 5,805,594 km (0.119 R)
• M22: 6,129,623 km (0.088 R)
• M23: 6,555,079 km (0.046 R)
• M24: 6,699,142 km (0.099 R)
• M25: 6,941,341 km (0.097 R)
• M26: 7,360,066 km (0.065 R)
• M27: 7,559,928 km (0.106 R)
• M28: 9,169,302 km (0.089 R)
• M29: 9,276,863 km (0.095 R)
• M30: 9,465,805 km (0.065 R)
• M31: 9,820,203 km (0.083 R)
• M32: 9,957,683 km (0.038 R)
• M33: 10,095,762 km (0.104 R)
• M34: 10,401,989 km (0.097 R)
• M35: 10,767,756 km (0.101 R)
• M36: 10,881,151 km (0.049 R)
• M37: 11,223,730 km (0.107 R)
• M38: 11,541,027 km (0.056 R)
• M39: 12,213,769 km (0.072 R)
• M40: 13,019,951 km (0.054 R)
• M41: 13,171,195 km (0.116 R)
• M42: 13,505,845 km (0.044 R)
• M43: 13,720,219 km (0.104 R)
• M44: 14,090,474 km (0.066 R)
• M45: 14,245,756 km (0.119 R)
• M46: 14,589,383 km (0.062 R)
• M47: 15,284,714 km (0.116 R)
• M48: 15,412,321 km (0.068 R)
• M49: 15,636,568 km (0.113 R)
• M50: 16,055,741 km (0.099 R)
• M51: 16,478,505 km (0.11 R)
• M52: 16,839,335 km (0.075 R)
• M53: 17,136,286 km (0.086 R)
• M54: 17,435,183 km (0.056 R)
• M55: 18,443,772 km (0.082 R)
• M56: 18,749,999 km (0.103 R)
• M57: 19,126,537 km (0.065 R)
• M58: 19,574,881 km (0.069 R)
• M59: 19,713,559 km (0.067 R)
• M60: 19,991,811 km (0.066 R)
• M61: 21,117,983 km (0.106 R)
• M62: 21,474,176 km (0.097 R)
• M63: 21,617,192 km (0.1 R)
• M64: 22,048,183 km (0.071 R)
• M65: 22,445,665 km (0.051 R)
• M66: 24,208,077 km (0.06 R)
• M67: 24,394,326 km (0.038 R)
• M68: 25,181,361 km (0.095 R)
• M69: 25,332,155 km (0.094 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 852

Radius: 10.4

Gravity: 7.88 G

Time & Orbit

Eccentricity (e): 0.011

Orbit Range: 6.07 AU - 6.21 AU

Year: 5557 Days

Day: 13.1 Hours

Environment

Temp: -147 °C

Axial Tilt: 99.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 35,225,095 km

• M1: 149,598 km (0.116 R)
• M2: 309,668 km (0.059 R)
• M3: 386,411 km (0.062 R)
• M4: 460,761 km (0.081 R)
• M5: 842,386 km (0.117 R)
• M6: 944,411 km (0.066 R)
• M7: 1,243,607 km (0.088 R)
• M8: 1,483,113 km (0.092 R)
• M9: 1,813,126 km (0.108 R)
• M10: 1,967,212 km (0.12 R)
• M11: 2,247,708 km (0.084 R)
• M12: 2,371,874 km (0.096 R)
• M13: 2,455,948 km (0.078 R)
• M14: 2,824,557 km (0.112 R)
• M15: 2,959,046 km (0.072 R)
• M16: 3,049,852 km (0.113 R)
• M17: 3,327,805 km (0.098 R)
• M18: 3,686,989 km (0.108 R)
• M19: 3,958,360 km (0.059 R)
• M20: 4,033,458 km (0.05 R)
• M21: 4,731,481 km (0.103 R)
• M22: 4,918,479 km (0.115 R)
• M23: 5,135,396 km (0.079 R)
• M24: 5,550,530 km (0.105 R)
• M25: 6,034,180 km (0.075 R)
• M26: 6,590,684 km (0.111 R)
• M27: 6,980,985 km (0.043 R)
• M28: 7,286,463 km (0.099 R)
• M29: 7,533,898 km (0.093 R)
• M30: 7,847,156 km (0.047 R)
• M31: 8,069,010 km (0.108 R)
• M32: 8,421,911 km (0.109 R)
• M33: 8,681,613 km (0.076 R)
• M34: 9,076,402 km (0.065 R)
• M35: 10,330,032 km (0.109 R)
• M36: 10,924,235 km (0.059 R)
• M37: 11,030,150 km (0.12 R)
• M38: 11,745,677 km (0.055 R)
• M39: 12,182,054 km (0.025 R)
• M40: 14,404,629 km (0.047 R)
• M41: 14,676,449 km (0.087 R)
• M42: 14,754,539 km (0.115 R)
• M43: 15,383,448 km (0.108 R)
• M44: 15,661,401 km (0.11 R)
• M45: 16,303,026 km (0.116 R)
• M46: 16,586,365 km (0.055 R)
• M47: 16,667,596 km (0.107 R)
• M48: 16,830,658 km (0.116 R)
• M49: 17,902,527 km (0.113 R)
• M50: 17,986,002 km (0.111 R)
• M51: 18,446,913 km (0.092 R)
• M52: 18,657,697 km (0.119 R)
• M53: 18,784,556 km (0.088 R)
• M54: 20,852,896 km (0.105 R)
• M55: 20,940,710 km (0.106 R)
• M56: 21,072,506 km (0.113 R)
• M57: 21,780,552 km (0.087 R)
• M58: 22,003,304 km (0.095 R)
• M59: 22,316,562 km (0.063 R)
• M60: 22,586,137 km (0.072 R)
• M61: 22,676,344 km (0.089 R)
• M62: 22,856,909 km (0.08 R)
• M63: 22,947,416 km (0.104 R)
• M64: 24,042,622 km (0.108 R)
• M65: 24,134,624 km (0.079 R)
• M66: 26,188,902 km (0.099 R)
• M67: 27,814,283 km (0.1 R)
• M68: 28,152,973 km (0.096 R)
• M69: 28,395,770 km (0.117 R)
• M70: 28,688,084 km (0.113 R)
• M71: 29,472,277 km (0.081 R)
• M72: 29,669,447 km (0.113 R)
• M73: 30,412,649 km (0.063 R)
• M74: 30,711,545 km (0.104 R)
• M75: 31,061,754 km (0.094 R)
• M76: 31,463,424 km (0.051 R)
• M77: 31,715,347 km (0.102 R)
• M78: 32,526,167 km (0.083 R)
• M79: 33,652,041 km (0.043 R)
• M80: 34,168,004 km (0.119 R)

Planet 8 - Gas Giant

Semi-Major Axis: 11.89 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 493.1

Radius: 11.5

Gravity: 3.73 G

Time & Orbit

Eccentricity (e): 0.122

Orbit Range: 10.44 AU - 13.34 AU

Year: 14975 Days

Day: 14.3 Hours

Environment

Temp: -179 °C

Axial Tilt: 26.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 35,225,095 km

• M1: 207,791 km (0.115 R)
• M2: 608,564 km (0.109 R)
• M3: 1,094,009 km (0.098 R)
• M4: 1,294,919 km (0.05 R)
• M5: 1,943,276 km (0.11 R)
• M6: 2,078,662 km (0.109 R)
• M7: 2,445,327 km (0.1 R)
• M8: 2,562,462 km (0.09 R)
• M9: 3,049,553 km (0.085 R)
• M10: 3,304,019 km (0.078 R)
• M11: 3,401,257 km (0.081 R)
• M12: 3,868,003 km (0.1 R)
• M13: 4,390,548 km (0.041 R)
• M14: 4,497,660 km (0.097 R)
• M15: 4,569,766 km (0.073 R)
• M16: 6,573,181 km (0.072 R)
• M17: 6,902,895 km (0.098 R)
• M18: 7,750,815 km (0.118 R)
• M19: 8,452,728 km (0.097 R)
• M20: 8,676,377 km (0.102 R)
• M21: 8,901,821 km (0.111 R)
• M22: 9,776,670 km (0.089 R)
• M23: 10,011,389 km (0.08 R)
• M24: 10,726,915 km (0.083 R)
• M25: 11,508,265 km (0.119 R)
• M26: 11,756,298 km (0.084 R)
• M27: 12,056,092 km (0.054 R)
• M28: 12,868,259 km (0.102 R)
• M29: 12,971,033 km (0.109 R)
• M30: 13,960,772 km (0.058 R)
• M31: 14,066,389 km (0.106 R)
• M32: 14,172,304 km (0.102 R)
• M33: 14,384,882 km (0.115 R)
• M34: 15,083,056 km (0.106 R)
• M35: 15,902,254 km (0.099 R)
• M36: 17,186,551 km (0.12 R)
• M37: 17,927,061 km (0.104 R)
• M38: 18,156,993 km (0.039 R)
• M39: 19,380,404 km (0.057 R)
• M40: 19,734,802 km (0.104 R)
• M41: 21,052,609 km (0.026 R)
• M42: 21,477,916 km (0.067 R)
• M43: 23,207,267 km (0.06 R)
• M44: 24,025,268 km (0.058 R)
• M45: 24,215,407 km (0.119 R)
• M46: 25,754,321 km (0.086 R)
• M47: 26,995,085 km (0.09 R)
• M48: 27,523,315 km (0.041 R)
• M49: 28,255,298 km (0.07 R)
• M50: 28,926,095 km (0.074 R)
• M51: 30,010,530 km (0.057 R)
• M52: 30,626,274 km (0.112 R)
• M53: 32,009,756 km (0.115 R)
• M54: 32,779,287 km (0.049 R)
• M55: 34,837,155 km (0.107 R)
• M56: 34,908,813 km (0.096 R)
• M57: 35,917,850 km (0.096 R)
• M58: 35,990,405 km (0.12 R)
• M59: 36,498,739 km (0.092 R)
• M60: 37,596,338 km (0.05 R)
• M61: 37,669,941 km (0.107 R)
• M62: 38,408,206 km (0.057 R)
• M63: 38,556,458 km (0.118 R)
• M64: 39,749,052 km (0.072 R)
• M65: 40,726,824 km (0.097 R)
• M66: 41,636,528 km (0.118 R)
• M67: 43,475,984 km (0.066 R)
• M68: 44,327,943 km (0.051 R)
• M69: 44,483,525 km (0.094 R)
• M70: 44,561,316 km (0.119 R)
• M71: 45,969,630 km (0.066 R)
• M72: 46,205,846 km (0.114 R)
• M73: 48,429,319 km (0.08 R)
• M74: 48,749,757 km (0.119 R)
• M75: 48,990,610 km (0.093 R)
• M76: 49,231,762 km (0.056 R)
• M77: 49,715,412 km (0.112 R)
• M78: 50,850,111 km (0.084 R)
• M79: 51,094,255 km (0.053 R)
• M80: 52,403,536 km (0.058 R)
• M81: 52,979,787 km (0.062 R)
• M82: 53,144,793 km (0.045 R)
• M83: 54,138,572 km (0.102 R)
• M84: 54,304,775 km (0.114 R)
• M85: 54,554,454 km (0.066 R)
• M86: 55,138,484 km (0.06 R)

Planet 9 - Gas Giant

Semi-Major Axis: 12.38 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 107.4

Radius: 15

Gravity: 0.48 G

Time & Orbit

Eccentricity (e): 0.151

Orbit Range: 10.51 AU - 14.25 AU

Year: 15910 Days

Day: 12.6 Hours

Environment

Temp: -194 °C

Axial Tilt: 22 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 35,225,095 km

• M1: 195,375 km (0.091 R)
• M2: 341,981 km (0.103 R)
• M3: 498,909 km (0.095 R)
• M4: 701,464 km (0.069 R)
• M5: 1,278,015 km (0.11 R)
• M6: 1,588,729 km (0.09 R)
• M7: 1,698,085 km (0.101 R)
• M8: 1,982,770 km (0.068 R)
• M9: 2,121,148 km (0.116 R)
• M10: 2,387,133 km (0.076 R)
• M11: 3,486,378 km (0.082 R)
• M12: 4,152,687 km (0.109 R)
• M13: 4,254,863 km (0.071 R)
• M14: 4,487,787 km (0.117 R)
• M15: 4,725,049 km (0.094 R)
• M16: 5,129,711 km (0.118 R)
• M17: 5,658,539 km (0.106 R)
• M18: 5,915,249 km (0.091 R)
• M19: 6,175,849 km (0.086 R)
• M20: 6,292,834 km (0.092 R)
• M21: 6,558,969 km (0.061 R)
• M22: 7,348,696 km (0.109 R)
• M23: 7,849,699 km (0.103 R)
• M24: 8,136,479 km (0.041 R)
• M25: 8,818,944 km (0.102 R)
• M26: 8,984,250 km (0.074 R)
• M27: 9,486,300 km (0.063 R)
• M28: 9,587,877 km (0.091 R)
• M29: 10,100,848 km (0.048 R)
• M30: 10,204,520 km (0.056 R)
• M31: 10,904,937 km (0.052 R)
• M32: 11,153,718 km (0.088 R)
• M33: 11,729,670 km (0.066 R)
• M34: 12,611,699 km (0.109 R)
• M35: 12,873,046 km (0.042 R)
• M36: 13,060,792 km (0.073 R)
• M37: 13,439,125 km (0.027 R)
• M38: 13,936,238 km (0.109 R)
• M39: 15,304,760 km (0.103 R)
• M40: 15,944,590 km (0.113 R)
• M41: 16,593,246 km (0.086 R)
• M42: 16,962,005 km (0.103 R)
• M43: 17,832,814 km (0.107 R)
• M44: 18,336,959 km (0.094 R)
• M45: 19,488,414 km (0.07 R)
• M46: 19,747,517 km (0.116 R)
• M47: 20,225,483 km (0.077 R)
• M48: 22,175,341 km (0.104 R)
• M49: 23,035,828 km (0.063 R)
• M50: 23,264,114 km (0.042 R)
• M51: 23,539,075 km (0.059 R)
• M52: 23,676,855 km (0.108 R)
• M53: 24,138,364 km (0.056 R)
• M54: 24,416,766 km (0.025 R)
• M55: 24,696,065 km (0.101 R)
• M56: 25,070,359 km (0.103 R)
• M57: 25,352,202 km (0.061 R)
• M58: 25,776,910 km (0.032 R)
• M59: 26,825,292 km (0.112 R)
• M60: 26,969,355 km (0.1 R)
• M61: 27,499,679 km (0.114 R)
• M62: 27,838,967 km (0.116 R)
• M63: 27,984,825 km (0.086 R)
• M64: 28,423,895 km (0.109 R)
• M65: 28,815,991 km (0.107 R)
• M66: 29,407,650 km (0.107 R)
• M67: 29,705,051 km (0.116 R)
• M68: 30,753,433 km (0.027 R)
• M69: 30,904,227 km (0.068 R)
• M70: 31,307,543 km (0.067 R)
• M71: 32,017,535 km (0.037 R)
• M72: 32,323,462 km (0.038 R)
• M73: 33,350,153 km (0.074 R)
• M74: 33,660,269 km (0.095 R)
• M75: 34,075,253 km (0.09 R)
• M76: 34,700,872 km (0.114 R)
• M77: 34,910,159 km (0.118 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: 538 - 20,216 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit