🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.55 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.37

Radius: 1.63

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 0.42 AU - 0.68 AU

Year: 143 Days

Day: 40.7 Hours

Environment

Temp: 263 °C

Axial Tilt: 2.1 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.55 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.61

Radius: 1.67

Gravity: 1.29 G

Time & Orbit

Eccentricity (e): 0.149

Orbit Range: 0.47 AU - 0.63 AU

Year: 143 Days

Day: 38.1 Hours

Environment

Temp: 193 °C

Axial Tilt: 46.1 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 58,752,186 km

• M1: 201,060 km (0.109 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.07 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.69

Radius: 1.69

Gravity: 1.29 G

Time & Orbit

Eccentricity (e): 0.153

Orbit Range: 0.91 AU - 1.23 AU

Year: 387 Days

Day: 44 Hours

Environment

Temp: 154 °C

Axial Tilt: 27.5 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 4 - Terrestrial

Semi-Major Axis: 1.13 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.45

Radius: 1.16

Gravity: 1.08 G

Time & Orbit

Eccentricity (e): 0.096

Orbit Range: 1.02 AU - 1.24 AU

Year: 420 Days

Day: 33.6 Hours

Environment

Temp: 45 °C

Axial Tilt: 48.4 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 5 - Terrestrial

Semi-Major Axis: 1.83 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.73

Radius: 1.49

Gravity: 1.23 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 1.61 AU - 2.05 AU

Year: 866 Days

Day: 18.5 Hours

Environment

Temp: -49 °C

Axial Tilt: 11.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 5.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 82.5

Radius: 8.3

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.005

Orbit Range: 5.95 AU - 6.01 AU

Year: 5116 Days

Day: 11.2 Hours

Environment

Temp: -143 °C

Axial Tilt: 19.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 58,752,186 km

• M1: 108,608 km (0.081 R)
• M2: 232,625 km (0.102 R)
• M3: 393,742 km (0.078 R)
• M4: 824,434 km (0.054 R)
• M5: 899,382 km (0.064 R)
• M6: 985,700 km (0.114 R)
• M7: 1,074,711 km (0.083 R)
• M8: 1,138,739 km (0.066 R)
• M9: 1,309,580 km (0.075 R)
• M10: 1,592,021 km (0.114 R)
• M11: 1,751,193 km (0.096 R)
• M12: 2,017,028 km (0.065 R)
• M13: 2,085,394 km (0.101 R)
• M14: 2,283,761 km (0.098 R)
• M15: 2,599,113 km (0.088 R)
• M16: 3,019,035 km (0.103 R)
• M17: 3,203,788 km (0.029 R)
• M18: 3,311,050 km (0.1 R)
• M19: 3,446,735 km (0.119 R)
• M20: 4,358,384 km (0.073 R)
• M21: 4,658,029 km (0.096 R)
• M22: 5,229,792 km (0.086 R)
• M23: 5,532,129 km (0.106 R)
• M24: 5,742,314 km (0.099 R)
• M25: 6,070,682 km (0.11 R)
• M26: 6,253,939 km (0.109 R)
• M27: 6,677,301 km (0.104 R)
• M28: 6,901,099 km (0.085 R)
• M29: 6,953,159 km (0.112 R)
• M30: 7,005,219 km (0.07 R)
• M31: 7,074,932 km (0.075 R)
• M32: 7,373,829 km (0.12 R)
• M33: 7,462,540 km (0.084 R)
• M34: 7,551,701 km (0.072 R)
• M35: 8,075,143 km (0.058 R)
• M36: 8,203,349 km (0.11 R)
• M37: 8,666,504 km (0.085 R)
• M38: 8,910,648 km (0.105 R)
• M39: 9,119,037 km (0.079 R)
• M40: 9,329,073 km (0.102 R)
• M41: 9,444,413 km (0.117 R)
• M42: 10,027,695 km (0.118 R)
• M43: 10,442,979 km (0.1 R)
• M44: 10,904,189 km (0.091 R)
• M45: 11,005,467 km (0.069 R)
• M46: 11,066,203 km (0.052 R)
• M47: 11,127,239 km (0.089 R)
• M48: 11,413,121 km (0.108 R)
• M49: 11,825,861 km (0.098 R)
• M50: 12,096,783 km (0.08 R)
• M51: 12,180,558 km (0.109 R)
• M52: 12,475,415 km (0.061 R)
• M53: 12,581,181 km (0.086 R)
• M54: 12,921,815 km (0.101 R)
• M55: 13,416,984 km (0.041 R)
• M56: 13,568,826 km (0.112 R)
• M57: 13,852,464 km (0.115 R)
• M58: 13,962,119 km (0.052 R)
• M59: 14,425,573 km (0.116 R)
• M60: 14,536,724 km (0.035 R)
• M61: 14,625,885 km (0.085 R)
• M62: 14,826,944 km (0.118 R)
• M63: 15,051,491 km (0.058 R)

Planet 7 - Gas Giant

Semi-Major Axis: 8.76 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 720.4

Radius: 10.2

Gravity: 6.92 G

Time & Orbit

Eccentricity (e): 0.114

Orbit Range: 7.76 AU - 9.76 AU

Year: 9071 Days

Day: 13.1 Hours

Environment

Temp: -163 °C

Axial Tilt: 43.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 58,752,186 km

• M1: 153,487 km (0.089 R)
• M2: 219,011 km (0.11 R)
• M3: 317,746 km (0.055 R)
• M4: 682,615 km (0.075 R)
• M5: 864,376 km (0.046 R)
• M6: 952,340 km (0.037 R)
• M7: 1,119,142 km (0.106 R)
• M8: 1,235,828 km (0.095 R)
• M9: 1,588,879 km (0.102 R)
• M10: 1,698,833 km (0.098 R)
• M11: 1,766,003 km (0.115 R)
• M12: 1,879,996 km (0.068 R)
• M13: 2,237,236 km (0.116 R)
• M14: 2,693,958 km (0.062 R)
• M15: 2,826,053 km (0.1 R)
• M16: 2,987,469 km (0.102 R)
• M17: 3,634,331 km (0.101 R)
• M18: 3,929,038 km (0.118 R)
• M19: 4,667,603 km (0.061 R)
• M20: 4,859,088 km (0.047 R)
• M21: 6,200,383 km (0.103 R)
• M22: 6,410,867 km (0.046 R)
• M23: 7,240,238 km (0.098 R)
• M24: 7,387,891 km (0.087 R)
• M25: 8,722,304 km (0.074 R)
• M26: 9,720,421 km (0.092 R)
• M27: 10,712,404 km (0.055 R)
• M28: 10,880,852 km (0.106 R)
• M29: 11,092,682 km (0.094 R)
• M30: 11,391,579 km (0.072 R)
• M31: 11,779,785 km (0.119 R)
• M32: 11,910,085 km (0.087 R)
• M33: 12,970,135 km (0.096 R)
• M34: 13,330,217 km (0.099 R)
• M35: 13,784,995 km (0.055 R)
• M36: 15,511,504 km (0.112 R)
• M37: 15,654,520 km (0.093 R)
• M38: 15,797,834 km (0.038 R)
• M39: 15,989,768 km (0.103 R)
• M40: 16,182,450 km (0.119 R)
• M41: 16,327,411 km (0.061 R)
• M42: 16,667,447 km (0.07 R)
• M43: 16,765,134 km (0.113 R)
• M44: 17,157,380 km (0.119 R)
• M45: 17,950,847 km (0.048 R)
• M46: 18,301,804 km (0.077 R)
• M47: 19,368,287 km (0.082 R)
• M48: 19,676,758 km (0.095 R)
• M49: 19,779,830 km (0.077 R)
• M50: 21,243,047 km (0.114 R)
• M51: 21,454,878 km (0.064 R)
• M52: 22,524,802 km (0.1 R)
• M53: 22,957,588 km (0.094 R)
• M54: 24,327,755 km (0.092 R)
• M55: 25,611,604 km (0.092 R)
• M56: 27,896,413 km (0.103 R)
• M57: 28,012,351 km (0.096 R)
• M58: 28,128,439 km (0.065 R)
• M59: 28,769,915 km (0.075 R)
• M60: 29,711,633 km (0.119 R)
• M61: 30,484,157 km (0.068 R)
• M62: 31,564,702 km (0.119 R)
• M63: 32,048,950 km (0.101 R)
• M64: 32,170,424 km (0.112 R)
• M65: 32,474,706 km (0.096 R)
• M66: 32,657,664 km (0.114 R)
• M67: 33,701,408 km (0.078 R)
• M68: 35,193,497 km (0.045 R)
• M69: 35,381,542 km (0.065 R)
• M70: 37,727,835 km (0.115 R)
• M71: 37,856,040 km (0.068 R)
• M72: 37,920,367 km (0.081 R)
• M73: 38,306,180 km (0.12 R)
• M74: 38,370,657 km (0.115 R)
• M75: 38,693,340 km (0.035 R)
• M76: 39,081,845 km (0.037 R)
• M77: 39,276,472 km (0.082 R)
• M78: 39,536,623 km (0.068 R)
• M79: 40,124,094 km (0.029 R)
• M80: 40,517,237 km (0.089 R)
• M81: 41,043,522 km (0.072 R)
• M82: 41,572,051 km (0.103 R)
• M83: 41,837,139 km (0.041 R)
• M84: 42,169,246 km (0.096 R)
• M85: 44,926,036 km (0.051 R)

Planet 8 - Gas Giant

Semi-Major Axis: 11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 212.1

Radius: 15

Gravity: 0.94 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 10.63 AU - 11.37 AU

Year: 12763 Days

Day: 11.2 Hours

Environment

Temp: -163 °C

Axial Tilt: 30 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (65)

Outer Limit: 58,752,186 km

• M1: 189,989 km (0.088 R)
• M2: 424,559 km (0.045 R)
• M3: 525,089 km (0.117 R)
• M4: 889,808 km (0.064 R)
• M5: 997,818 km (0.052 R)
• M6: 1,211,743 km (0.074 R)
• M7: 2,132,966 km (0.105 R)
• M8: 2,370,378 km (0.092 R)
• M9: 3,038,034 km (0.051 R)
• M10: 3,557,138 km (0.032 R)
• M11: 3,788,416 km (0.101 R)
• M12: 4,678,673 km (0.094 R)
• M13: 4,791,021 km (0.119 R)
• M14: 5,425,017 km (0.116 R)
• M15: 5,902,833 km (0.109 R)
• M16: 6,270,245 km (0.099 R)
• M17: 6,550,741 km (0.106 R)
• M18: 7,614,681 km (0.096 R)
• M19: 7,780,585 km (0.069 R)
• M20: 8,251,669 km (0.106 R)
• M21: 8,524,984 km (0.101 R)
• M22: 8,628,207 km (0.12 R)
• M23: 8,766,734 km (0.08 R)
• M24: 8,940,717 km (0.079 R)
• M25: 9,045,734 km (0.064 R)
• M26: 9,256,817 km (0.083 R)
• M27: 9,434,091 km (0.12 R)
• M28: 10,081,700 km (0.114 R)
• M29: 12,109,798 km (0.066 R)
• M30: 13,289,826 km (0.082 R)
• M31: 13,570,472 km (0.095 R)
• M32: 14,056,066 km (0.11 R)
• M33: 14,630,073 km (0.096 R)
• M34: 15,421,147 km (0.114 R)
• M35: 15,547,258 km (0.097 R)
• M36: 15,843,162 km (0.094 R)
• M37: 16,226,133 km (0.119 R)
• M38: 17,001,499 km (0.048 R)
• M39: 17,131,948 km (0.115 R)
• M40: 17,788,982 km (0.083 R)
• M41: 18,498,973 km (0.11 R)
• M42: 18,857,410 km (0.094 R)
• M43: 19,581,314 km (0.117 R)
• M44: 20,776,900 km (0.118 R)
• M45: 21,243,197 km (0.076 R)
• M46: 21,336,845 km (0.117 R)
• M47: 22,328,529 km (0.073 R)
• M48: 22,806,046 km (0.057 R)
• M49: 23,674,013 km (0.084 R)
• M50: 24,209,872 km (0.103 R)
• M51: 24,307,709 km (0.113 R)
• M52: 24,405,696 km (0.109 R)
• M53: 24,503,832 km (0.118 R)
• M54: 24,798,989 km (0.089 R)
• M55: 25,492,225 km (0.113 R)
• M56: 27,559,219 km (0.08 R)
• M57: 28,897,671 km (0.094 R)
• M58: 30,257,217 km (0.096 R)
• M59: 31,104,240 km (0.086 R)
• M60: 31,317,267 km (0.116 R)
• M61: 31,530,743 km (0.116 R)
• M62: 31,905,486 km (0.113 R)
• M63: 33,473,571 km (0.087 R)
• M64: 34,624,876 km (0.055 R)
• M65: 35,733,396 km (0.106 R)

Planet 9 - Gas Giant

Semi-Major Axis: 11.16 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 261.8

Radius: 9.4

Gravity: 2.96 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 9.41 AU - 12.91 AU

Year: 13043 Days

Day: 8.9 Hours

Environment

Temp: -169 °C

Axial Tilt: 9.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 58,752,186 km

• M1: 525,388 km (0.091 R)
• M2: 636,539 km (0.059 R)
• M3: 851,212 km (0.113 R)
• M4: 1,001,707 km (0.116 R)
• M5: 1,253,630 km (0.025 R)
• M6: 1,968,858 km (0.087 R)
• M7: 2,498,434 km (0.088 R)
• M8: 2,717,445 km (0.08 R)
• M9: 3,070,646 km (0.103 R)
• M10: 3,148,287 km (0.082 R)
• M11: 3,465,435 km (0.082 R)
• M12: 3,932,180 km (0.066 R)
• M13: 4,073,400 km (0.069 R)
• M14: 4,158,821 km (0.098 R)
• M15: 4,302,584 km (0.027 R)
• M16: 4,744,048 km (0.083 R)
• M17: 4,985,499 km (0.105 R)
• M18: 5,046,385 km (0.101 R)
• M19: 5,261,806 km (0.037 R)
• M20: 6,153,708 km (0.082 R)
• M21: 6,219,232 km (0.071 R)
• M22: 6,717,842 km (0.04 R)
• M23: 7,229,467 km (0.082 R)
• M24: 8,435,076 km (0.085 R)
• M25: 8,544,432 km (0.061 R)
• M26: 8,690,888 km (0.115 R)
• M27: 9,247,991 km (0.12 R)
• M28: 9,398,486 km (0.095 R)
• M29: 9,549,879 km (0.066 R)
• M30: 10,008,696 km (0.08 R)
• M31: 10,279,767 km (0.098 R)
• M32: 10,553,083 km (0.098 R)
• M33: 10,710,460 km (0.098 R)
• M34: 11,067,250 km (0.076 R)
• M35: 11,508,714 km (0.067 R)
• M36: 11,833,491 km (0.113 R)
• M37: 12,037,991 km (0.113 R)
• M38: 12,616,636 km (0.067 R)
• M39: 13,246,891 km (0.069 R)
• M40: 13,374,199 km (0.099 R)
• M41: 13,459,171 km (0.094 R)
• M42: 13,672,647 km (0.12 R)
• M43: 13,801,301 km (0.088 R)
• M44: 14,406,873 km (0.112 R)
• M45: 14,800,765 km (0.082 R)
• M46: 16,139,217 km (0.087 R)
• M47: 16,411,634 km (0.064 R)
• M48: 16,777,102 km (0.112 R)
• M49: 17,655,840 km (0.057 R)
• M50: 18,077,257 km (0.118 R)
• M51: 18,265,750 km (0.082 R)
• M52: 18,596,960 km (0.07 R)
• M53: 19,457,896 km (0.093 R)
• M54: 21,268,180 km (0.101 R)
• M55: 22,825,793 km (0.072 R)
• M56: 22,927,519 km (0.12 R)
• M57: 24,784,926 km (0.054 R)
• M58: 24,994,214 km (0.084 R)
• M59: 25,099,082 km (0.107 R)
• M60: 25,204,249 km (0.086 R)
• M61: 26,851,023 km (0.064 R)
• M62: 27,012,140 km (0.115 R)
• M63: 28,095,079 km (0.115 R)
• M64: 28,313,491 km (0.08 R)
• M65: 28,751,664 km (0.101 R)
• M66: 29,081,976 km (0.084 R)
• M67: 29,357,984 km (0.087 R)
• M68: 30,079,943 km (0.117 R)
• M69: 30,247,493 km (0.113 R)
• M70: 30,471,141 km (0.08 R)
• M71: 30,864,135 km (0.119 R)
• M72: 30,976,633 km (0.109 R)
• M73: 32,395,120 km (0.061 R)
• M74: 32,509,562 km (0.081 R)
• M75: 33,660,867 km (0.09 R)
• M76: 34,299,800 km (0.104 R)
• M77: 34,591,516 km (0.046 R)
• M78: 34,825,487 km (0.101 R)
• M79: 35,884,939 km (0.099 R)
• M80: 36,418,704 km (0.049 R)
• M81: 37,014,702 km (0.083 R)
• M82: 38,579,645 km (0.104 R)
• M83: 38,761,556 km (0.114 R)
• M84: 38,883,030 km (0.112 R)
• M85: 39,187,162 km (0.079 R)
• M86: 39,859,305 km (0.104 R)
• M87: 40,473,554 km (0.1 R)
• M88: 41,400,762 km (0.097 R)

Planet 10 - Gas Giant

Semi-Major Axis: 11.59 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 662

Radius: 9

Gravity: 8.17 G

Time & Orbit

Eccentricity (e): 0.086

Orbit Range: 10.59 AU - 12.59 AU

Year: 13804 Days

Day: 8.9 Hours

Environment

Temp: -172 °C

Axial Tilt: 12.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 58,752,186 km

• M1: 132,693 km (0.092 R)
• M2: 343,776 km (0.111 R)
• M3: 747,989 km (0.047 R)
• M4: 1,017,266 km (0.101 R)
• M5: 1,128,866 km (0.086 R)
• M6: 1,539,512 km (0.114 R)
• M7: 1,668,914 km (0.071 R)
• M8: 1,748,350 km (0.072 R)
• M9: 2,734,649 km (0.119 R)
• M10: 2,860,461 km (0.073 R)
• M11: 3,282,925 km (0.077 R)
• M12: 3,864,861 km (0.037 R)
• M13: 4,815,855 km (0.092 R)
• M14: 4,892,000 km (0.116 R)
• M15: 4,968,444 km (0.118 R)
• M16: 5,634,604 km (0.086 R)
• M17: 5,714,788 km (0.094 R)
• M18: 5,957,885 km (0.103 R)
• M19: 6,287,150 km (0.066 R)
• M20: 7,179,651 km (0.105 R)
• M21: 7,707,432 km (0.06 R)
• M22: 7,886,201 km (0.097 R)
• M23: 8,202,152 km (0.106 R)
• M24: 8,660,969 km (0.118 R)
• M25: 9,699,328 km (0.063 R)
• M26: 10,184,324 km (0.078 R)
• M27: 11,329,645 km (0.07 R)
• M28: 12,150,189 km (0.086 R)
• M29: 12,725,543 km (0.09 R)
• M30: 12,936,925 km (0.046 R)
• M31: 13,363,129 km (0.03 R)
• M32: 13,848,275 km (0.071 R)
• M33: 14,011,187 km (0.067 R)
• M34: 14,229,600 km (0.118 R)
• M35: 14,946,922 km (0.104 R)
• M36: 15,058,222 km (0.117 R)
• M37: 17,578,049 km (0.102 R)
• M38: 18,050,180 km (0.119 R)
• M39: 19,551,993 km (0.116 R)
• M40: 21,156,131 km (0.077 R)
• M41: 21,218,663 km (0.073 R)
• M42: 21,406,707 km (0.025 R)
• M43: 21,910,703 km (0.076 R)
• M44: 21,973,982 km (0.065 R)
• M45: 23,059,016 km (0.046 R)
• M46: 23,510,801 km (0.103 R)
• M47: 24,817,838 km (0.103 R)
• M48: 25,947,302 km (0.055 R)
• M49: 29,225,590 km (0.082 R)
• M50: 29,574,601 km (0.102 R)
• M51: 29,854,649 km (0.079 R)
• M52: 31,840,261 km (0.112 R)
• M53: 33,941,513 km (0.112 R)
• M54: 34,381,779 km (0.071 R)
• M55: 35,490,748 km (0.089 R)
• M56: 36,087,046 km (0.088 R)
• M57: 36,236,643 km (0.093 R)
• M58: 36,386,391 km (0.11 R)
• M59: 37,213,966 km (0.06 R)
• M60: 37,971,530 km (0.084 R)
• M61: 38,734,329 km (0.113 R)
• M62: 39,810,686 km (0.056 R)
• M63: 40,352,530 km (0.091 R)
• M64: 40,663,394 km (0.083 R)
• M65: 41,208,977 km (0.1 R)
• M66: 41,835,643 km (0.045 R)
• M67: 41,992,870 km (0.065 R)
• M68: 43,098,399 km (0.056 R)
• M69: 43,893,960 km (0.092 R)
• M70: 43,973,696 km (0.103 R)
• M71: 44,133,466 km (0.098 R)
• M72: 44,213,501 km (0.099 R)
• M73: 44,614,124 km (0.103 R)
• M74: 44,774,643 km (0.104 R)
• M75: 44,854,977 km (0.105 R)
• M76: 46,797,804 km (0.105 R)
• M77: 47,206,057 km (0.049 R)
• M78: 47,615,357 km (0.106 R)
• M79: 48,026,003 km (0.099 R)
• M80: 49,098,919 km (0.068 R)
• M81: 50,597,740 km (0.061 R)
• M82: 54,067,064 km (0.095 R)
• M83: 54,152,634 km (0.079 R)
• M84: 54,752,970 km (0.055 R)
• M85: 55,960,075 km (0.117 R)
• M86: 56,566,994 km (0.117 R)
• M87: 57,176,007 km (0.068 R)
• M88: 58,664,207 km (0.103 R)

Kuiper Belt

Range: 31.4 - 54.4 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 464 - 16,275 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit