🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.56 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.48

Radius: 1.65

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.006

Orbit Range: 0.56 AU - 0.56 AU

Year: 271 Days

Day: 33.3 Hours

Environment

Temp: -113 °C

Axial Tilt: 13.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.83 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 184.8

Radius: 9

Gravity: 2.28 G

Time & Orbit

Eccentricity (e): 0.011

Orbit Range: 0.82 AU - 0.84 AU

Year: 488 Days

Day: 6.7 Hours

Environment

Temp: -151 °C

Axial Tilt: 45.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (44)

Outer Limit: 40,174,917 km

• M1: 116,537 km (0.092 R)
• M2: 201,359 km (0.103 R)
• M3: 305,030 km (0.054 R)
• M4: 376,837 km (0.063 R)
• M5: 434,881 km (0.088 R)
• M6: 530,175 km (0.039 R)
• M7: 670,348 km (0.045 R)
• M8: 750,383 km (0.11 R)
• M9: 874,998 km (0.081 R)
• M10: 934,687 km (0.095 R)
• M11: 999,613 km (0.043 R)
• M12: 1,058,555 km (0.041 R)
• M13: 1,126,472 km (0.077 R)
• M14: 1,286,841 km (0.099 R)
• M15: 1,347,428 km (0.08 R)
• M16: 1,467,406 km (0.082 R)
• M17: 1,556,566 km (0.109 R)
• M18: 1,621,342 km (0.112 R)
• M19: 1,704,817 km (0.062 R)
• M20: 1,825,992 km (0.036 R)
• M21: 1,931,608 km (0.089 R)
• M22: 2,034,531 km (0.101 R)
• M23: 2,163,335 km (0.029 R)
• M24: 2,255,637 km (0.026 R)
• M25: 2,319,515 km (0.095 R)
• M26: 2,399,101 km (0.109 R)
• M27: 2,459,389 km (0.041 R)
• M28: 2,627,836 km (0.118 R)
• M29: 2,752,750 km (0.06 R)
• M30: 2,879,609 km (0.064 R)
• M31: 2,954,558 km (0.047 R)
• M32: 3,062,867 km (0.069 R)
• M33: 3,177,908 km (0.114 R)
• M34: 3,249,864 km (0.109 R)
• M35: 3,311,199 km (0.12 R)
• M36: 3,378,518 km (0.088 R)
• M37: 3,451,971 km (0.055 R)
• M38: 3,543,226 km (0.1 R)
• M39: 3,652,582 km (0.1 R)
• M40: 3,733,813 km (0.034 R)
• M41: 3,856,932 km (0.103 R)
• M42: 3,945,644 km (0.107 R)
• M43: 4,017,152 km (0.108 R)
• M44: 4,107,210 km (0.042 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 83.4

Radius: 11.3

Gravity: 0.65 G

Time & Orbit

Eccentricity (e): 0.195

Orbit Range: 0.68 AU - 1 AU

Year: 497 Days

Day: 8.1 Hours

Environment

Temp: -144 °C

Axial Tilt: 16.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (29)

Outer Limit: 40,174,917 km

• M1: 146,756 km (0.075 R)
• M2: 219,310 km (0.097 R)
• M3: 326,123 km (0.109 R)
• M4: 455,226 km (0.106 R)
• M5: 590,762 km (0.118 R)
• M6: 722,707 km (0.06 R)
• M7: 798,404 km (0.103 R)
• M8: 949,797 km (0.11 R)
• M9: 1,052,271 km (0.092 R)
• M10: 1,133,353 km (0.108 R)
• M11: 1,229,694 km (0.096 R)
• M12: 1,315,564 km (0.101 R)
• M13: 1,427,612 km (0.085 R)
• M14: 1,514,678 km (0.118 R)
• M15: 1,596,508 km (0.057 R)
• M16: 1,676,244 km (0.05 R)
• M17: 1,817,315 km (0.119 R)
• M18: 1,947,016 km (0.073 R)
• M19: 2,044,255 km (0.062 R)
• M20: 2,163,335 km (0.103 R)
• M21: 2,256,235 km (0.06 R)
• M22: 2,400,298 km (0.05 R)
• M23: 2,521,921 km (0.071 R)
• M24: 2,607,042 km (0.117 R)
• M25: 2,727,917 km (0.108 R)
• M26: 2,886,192 km (0.104 R)
• M27: 2,957,400 km (0.103 R)
• M28: 3,065,560 km (0.118 R)
• M29: 3,152,177 km (0.113 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 898.2

Radius: 13.3

Gravity: 5.08 G

Time & Orbit

Eccentricity (e): 0.112

Orbit Range: 0.97 AU - 1.21 AU

Year: 735 Days

Day: 6.7 Hours

Environment

Temp: -164 °C

Axial Tilt: 0.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (54)

Outer Limit: 40,174,917 km

• M1: 166,951 km (0.109 R)
• M2: 269,426 km (0.112 R)
• M3: 366,066 km (0.054 R)
• M4: 472,879 km (0.096 R)
• M5: 664,514 km (0.116 R)
• M6: 782,247 km (0.088 R)
• M7: 908,059 km (0.115 R)
• M8: 1,016,667 km (0.089 R)
• M9: 1,110,764 km (0.058 R)
• M10: 1,504,506 km (0.027 R)
• M11: 1,620,893 km (0.113 R)
• M12: 1,763,310 km (0.089 R)
• M13: 1,957,339 km (0.092 R)
• M14: 2,125,786 km (0.068 R)
• M15: 2,232,599 km (0.111 R)
• M16: 2,324,601 km (0.097 R)
• M17: 2,443,382 km (0.113 R)
• M18: 2,529,550 km (0.107 R)
• M19: 2,660,748 km (0.051 R)
• M20: 2,785,363 km (0.062 R)
• M21: 2,957,700 km (0.09 R)
• M22: 3,161,751 km (0.054 R)
• M23: 3,246,573 km (0.072 R)
• M24: 3,476,655 km (0.091 R)
• M25: 3,712,122 km (0.093 R)
• M26: 3,811,903 km (0.094 R)
• M27: 3,932,778 km (0.106 R)
• M28: 4,199,212 km (0.085 R)
• M29: 4,292,711 km (0.076 R)
• M30: 4,397,579 km (0.05 R)
• M31: 4,609,858 km (0.101 R)
• M32: 4,814,807 km (0.111 R)
• M33: 4,934,785 km (0.078 R)
• M34: 5,055,810 km (0.086 R)
• M35: 5,222,462 km (0.08 R)
• M36: 5,312,071 km (0.091 R)
• M37: 5,470,196 km (0.068 R)
• M38: 5,721,819 km (0.099 R)
• M39: 6,118,403 km (0.088 R)
• M40: 6,355,815 km (0.091 R)
• M41: 6,535,931 km (0.09 R)
• M42: 6,669,073 km (0.07 R)
• M43: 6,815,380 km (0.086 R)
• M44: 6,962,883 km (0.064 R)
• M45: 7,074,184 km (0.096 R)
• M46: 7,161,100 km (0.113 R)
• M47: 7,386,395 km (0.07 R)
• M48: 7,715,809 km (0.095 R)
• M49: 7,959,804 km (0.104 R)
• M50: 8,336,940 km (0.11 R)
• M51: 8,481,601 km (0.11 R)
• M52: 8,653,638 km (0.105 R)
• M53: 8,786,781 km (0.099 R)
• M54: 9,028,082 km (0.101 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 95.1

Radius: 10.6

Gravity: 0.85 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 0.94 AU - 1.28 AU

Year: 755 Days

Day: 13.5 Hours

Environment

Temp: -155 °C

Axial Tilt: 37.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (36)

Outer Limit: 40,174,917 km

• M1: 133,890 km (0.085 R)
• M2: 218,413 km (0.047 R)
• M3: 326,572 km (0.119 R)
• M4: 409,749 km (0.089 R)
• M5: 496,665 km (0.076 R)
• M6: 563,685 km (0.035 R)
• M7: 634,445 km (0.052 R)
• M8: 718,668 km (0.116 R)
• M9: 807,230 km (0.106 R)
• M10: 874,400 km (0.117 R)
• M11: 973,433 km (0.106 R)
• M12: 1,045,689 km (0.104 R)
• M13: 1,115,851 km (0.071 R)
• M14: 1,240,615 km (0.075 R)
• M15: 1,307,037 km (0.073 R)
• M16: 1,460,973 km (0.089 R)
• M17: 1,526,945 km (0.095 R)
• M18: 1,593,965 km (0.043 R)
• M19: 1,671,158 km (0.062 R)
• M20: 1,820,008 km (0.085 R)
• M21: 1,915,451 km (0.118 R)
• M22: 2,116,361 km (0.086 R)
• M23: 2,673,015 km (0.03 R)
• M24: 2,903,844 km (0.029 R)
• M25: 3,016,043 km (0.093 R)
• M26: 3,101,164 km (0.087 R)
• M27: 3,175,664 km (0.101 R)
• M28: 3,332,293 km (0.083 R)
• M29: 3,467,679 km (0.108 R)
• M30: 3,580,924 km (0.109 R)
• M31: 3,750,119 km (0.065 R)
• M32: 3,841,823 km (0.098 R)
• M33: 4,077,739 km (0.09 R)
• M34: 4,153,286 km (0.041 R)
• M35: 4,235,565 km (0.047 R)
• M36: 4,312,009 km (0.114 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.31 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 893.9

Radius: 9.2

Gravity: 10.56 G

Time & Orbit

Eccentricity (e): 0.077

Orbit Range: 1.21 AU - 1.41 AU

Year: 968 Days

Day: 5.8 Hours

Environment

Temp: -169 °C

Axial Tilt: 9.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (61)

Outer Limit: 40,174,917 km

• M1: 119,529 km (0.079 R)
• M2: 208,539 km (0.1 R)
• M3: 271,071 km (0.092 R)
• M4: 390,002 km (0.06 R)
• M5: 540,647 km (0.114 R)
• M6: 626,665 km (0.1 R)
• M7: 711,637 km (0.086 R)
• M8: 781,350 km (0.105 R)
• M9: 1,012,478 km (0.027 R)
• M10: 1,196,334 km (0.031 R)
• M11: 1,351,617 km (0.089 R)
• M12: 1,439,730 km (0.053 R)
• M13: 1,786,049 km (0.071 R)
• M14: 2,186,223 km (0.097 R)
• M15: 2,377,409 km (0.077 R)
• M16: 2,475,097 km (0.096 R)
• M17: 2,694,856 km (0.061 R)
• M18: 2,868,988 km (0.116 R)
• M19: 3,068,103 km (0.081 R)
• M20: 3,142,602 km (0.116 R)
• M21: 3,217,701 km (0.047 R)
• M22: 3,369,692 km (0.085 R)
• M23: 3,490,866 km (0.044 R)
• M24: 3,568,807 km (0.03 R)
• M25: 3,828,808 km (0.117 R)
• M26: 4,048,268 km (0.112 R)
• M27: 4,177,221 km (0.088 R)
• M28: 4,343,425 km (0.084 R)
• M29: 4,523,840 km (0.096 R)
• M30: 4,596,694 km (0.118 R)
• M31: 4,842,483 km (0.098 R)
• M32: 4,967,098 km (0.112 R)
• M33: 5,206,604 km (0.097 R)
• M34: 5,359,793 km (0.076 R)
• M35: 5,605,582 km (0.095 R)
• M36: 5,762,809 km (0.048 R)
• M37: 5,868,276 km (0.098 R)
• M38: 6,041,211 km (0.07 R)
• M39: 6,269,946 km (0.098 R)
• M40: 6,542,663 km (0.117 R)
• M41: 6,680,592 km (0.081 R)
• M42: 6,805,506 km (0.092 R)
• M43: 7,071,641 km (0.087 R)
• M44: 7,213,161 km (0.071 R)
• M45: 7,499,042 km (0.102 R)
• M46: 7,803,175 km (0.068 R)
• M47: 7,934,821 km (0.117 R)
• M48: 7,993,463 km (0.029 R)
• M49: 8,067,065 km (0.095 R)
• M50: 8,229,828 km (0.098 R)
• M51: 8,408,597 km (0.094 R)
• M52: 8,952,834 km (0.093 R)
• M53: 9,430,500 km (0.118 R)
• M54: 9,774,426 km (0.1 R)
• M55: 9,900,686 km (0.098 R)
• M56: 10,250,297 km (0.08 R)
• M57: 10,314,324 km (0.062 R)
• M58: 10,410,665 km (0.029 R)
• M59: 10,652,565 km (0.113 R)
• M60: 10,766,260 km (0.095 R)
• M61: 10,896,410 km (0.081 R)

Planet 7 - Gas Giant

Semi-Major Axis: 1.55 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 727.3

Radius: 14.6

Gravity: 3.41 G

Time & Orbit

Eccentricity (e): 0.139

Orbit Range: 1.33 AU - 1.77 AU

Year: 1246 Days

Day: 13.3 Hours

Environment

Temp: -179 °C

Axial Tilt: 10.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 40,174,917 km

• M1: 183,557 km (0.084 R)
• M2: 300,093 km (0.096 R)
• M3: 394,639 km (0.11 R)
• M4: 489,933 km (0.088 R)
• M5: 699,968 km (0.093 R)
• M6: 804,388 km (0.055 R)
• M7: 987,047 km (0.107 R)
• M8: 1,216,380 km (0.092 R)
• M9: 1,313,320 km (0.068 R)
• M10: 1,507,049 km (0.076 R)
• M11: 1,647,821 km (0.03 R)
• M12: 1,765,554 km (0.066 R)
• M13: 1,876,855 km (0.107 R)
• M14: 1,990,699 km (0.071 R)
• M15: 2,638,009 km (0.119 R)
• M16: 3,164,893 km (0.067 R)
• M17: 3,809,211 km (0.059 R)
• M18: 3,979,752 km (0.113 R)
• M19: 4,140,570 km (0.1 R)
• M20: 4,379,478 km (0.078 R)
• M21: 4,545,531 km (0.09 R)
• M22: 4,726,844 km (0.1 R)
• M23: 5,462,267 km (0.105 R)
• M24: 5,627,573 km (0.09 R)
• M25: 5,780,611 km (0.107 R)
• M26: 6,048,242 km (0.083 R)
• M27: 6,421,040 km (0.077 R)
• M28: 6,890,478 km (0.095 R)
• M29: 6,994,598 km (0.078 R)
• M30: 7,129,236 km (0.113 R)
• M31: 7,401,355 km (0.079 R)
• M32: 7,492,759 km (0.082 R)
• M33: 7,630,688 km (0.109 R)
• M34: 7,893,532 km (0.112 R)
• M35: 8,269,621 km (0.039 R)
• M36: 8,459,909 km (0.1 R)
• M37: 8,587,666 km (0.096 R)
• M38: 8,683,857 km (0.04 R)
• M39: 8,909,750 km (0.084 R)
• M40: 9,121,132 km (0.066 R)
• M41: 9,284,941 km (0.104 R)
• M42: 9,799,109 km (0.114 R)
• M43: 9,899,639 km (0.095 R)
• M44: 10,051,182 km (0.101 R)
• M45: 10,186,568 km (0.087 R)
• M46: 10,339,606 km (0.077 R)
• M47: 10,768,653 km (0.069 R)
• M48: 11,011,450 km (0.103 R)
• M49: 11,238,690 km (0.076 R)
• M50: 12,090,799 km (0.096 R)

Planet 8 - Gas Giant

Semi-Major Axis: 2.92 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 54.2

Radius: 12.4

Gravity: 0.35 G

Time & Orbit

Eccentricity (e): 0.202

Orbit Range: 2.33 AU - 3.51 AU

Year: 3222 Days

Day: 7.8 Hours

Environment

Temp: -201 °C

Axial Tilt: 28.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 40,174,917 km

• M1: 165,156 km (0.1 R)
• M2: 273,615 km (0.067 R)
• M3: 441,763 km (0.051 R)
• M4: 544,835 km (0.09 R)
• M5: 690,544 km (0.054 R)
• M6: 862,881 km (0.041 R)
• M7: 1,024,596 km (0.06 R)
• M8: 1,459,776 km (0.087 R)
• M9: 1,617,452 km (0.053 R)
• M10: 1,717,982 km (0.041 R)
• M11: 1,884,933 km (0.069 R)
• M12: 2,082,702 km (0.052 R)
• M13: 2,235,591 km (0.109 R)
• M14: 2,392,220 km (0.091 R)
• M15: 2,561,714 km (0.088 R)
• M16: 2,837,572 km (0.114 R)
• M17: 3,162,050 km (0.095 R)
• M18: 3,328,852 km (0.097 R)
• M19: 3,488,622 km (0.068 R)
• M20: 3,579,578 km (0.084 R)
• M21: 3,681,604 km (0.074 R)
• M22: 3,826,115 km (0.082 R)
• M23: 3,983,193 km (0.101 R)
• M24: 4,120,973 km (0.074 R)
• M25: 4,325,323 km (0.119 R)
• M26: 4,744,048 km (0.117 R)
• M27: 4,845,176 km (0.049 R)
• M28: 4,969,791 km (0.091 R)
• M29: 5,129,861 km (0.111 R)
• M30: 5,245,350 km (0.099 R)
• M31: 5,478,872 km (0.086 R)
• M32: 5,561,301 km (0.082 R)
• M33: 5,703,868 km (0.107 R)
• M34: 5,883,684 km (0.103 R)
• M35: 6,212,201 km (0.104 R)
• M36: 6,409,670 km (0.107 R)
• M37: 6,735,195 km (0.094 R)
• M38: 6,900,052 km (0.111 R)
• M39: 7,078,971 km (0.111 R)
• M40: 7,324,312 km (0.103 R)
• M41: 7,428,581 km (0.082 R)
• M42: 7,743,934 km (0.103 R)
• M43: 7,890,091 km (0.089 R)
• M44: 8,117,629 km (0.063 R)
• M45: 8,333,798 km (0.102 R)
• M46: 8,429,092 km (0.077 R)
• M47: 8,593,051 km (0.105 R)
• M48: 9,091,511 km (0.091 R)
• M49: 9,485,851 km (0.075 R)
• M50: 9,642,331 km (0.068 R)

Planet 9 - Gas Giant

Semi-Major Axis: 4.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 914.2

Radius: 11.4

Gravity: 7.03 G

Time & Orbit

Eccentricity (e): 0.192

Orbit Range: 3.82 AU - 5.64 AU

Year: 6642 Days

Day: 14.7 Hours

Environment

Temp: -224 °C

Axial Tilt: 0.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 40,174,917 km

• M1: 255,064 km (0.112 R)
• M2: 360,232 km (0.117 R)
• M3: 462,108 km (0.036 R)
• M4: 575,952 km (0.09 R)
• M5: 715,527 km (0.087 R)
• M6: 1,743,862 km (0.077 R)
• M7: 1,932,206 km (0.086 R)
• M8: 2,194,002 km (0.07 R)
• M9: 2,352,127 km (0.079 R)
• M10: 3,589,003 km (0.118 R)
• M11: 4,216,566 km (0.062 R)
• M12: 4,329,213 km (0.081 R)
• M13: 4,414,334 km (0.114 R)
• M14: 5,266,443 km (0.105 R)
• M15: 5,388,067 km (0.05 R)
• M16: 5,572,072 km (0.104 R)
• M17: 6,009,795 km (0.083 R)
• M18: 6,136,804 km (0.105 R)
• M19: 6,329,187 km (0.109 R)
• M20: 6,654,263 km (0.118 R)
• M21: 7,219,294 km (0.05 R)
• M22: 7,730,919 km (0.101 R)
• M23: 8,324,822 km (0.034 R)
• M24: 8,752,971 km (0.069 R)
• M25: 9,519,511 km (0.105 R)
• M26: 9,630,662 km (0.105 R)
• M27: 10,004,806 km (0.071 R)
• M28: 10,080,204 km (0.102 R)
• M29: 10,421,736 km (0.114 R)
• M30: 10,574,774 km (0.104 R)
• M31: 11,311,993 km (0.04 R)
• M32: 11,706,632 km (0.069 R)
• M33: 11,865,804 km (0.103 R)
• M34: 12,226,484 km (0.092 R)
• M35: 14,168,414 km (0.094 R)
• M36: 14,551,086 km (0.06 R)
• M37: 14,722,375 km (0.071 R)
• M38: 15,501,032 km (0.112 R)
• M39: 15,895,372 km (0.111 R)
• M40: 16,027,617 km (0.11 R)
• M41: 16,337,434 km (0.12 R)
• M42: 16,515,455 km (0.054 R)
• M43: 17,188,646 km (0.097 R)
• M44: 17,279,003 km (0.036 R)
• M45: 17,962,366 km (0.092 R)
• M46: 18,100,146 km (0.11 R)
• M47: 18,700,931 km (0.044 R)
• M48: 18,933,855 km (0.105 R)
• M49: 19,969,820 km (0.078 R)
• M50: 23,186,922 km (0.117 R)
• M51: 23,437,050 km (0.088 R)
• M52: 23,940,297 km (0.058 R)
• M53: 24,294,545 km (0.082 R)
• M54: 26,300,203 km (0.096 R)
• M55: 26,928,066 km (0.085 R)
• M56: 27,719,737 km (0.106 R)
• M57: 27,825,802 km (0.071 R)
• M58: 27,932,166 km (0.106 R)
• M59: 28,412,076 km (0.12 R)
• M60: 29,705,051 km (0.11 R)
• M61: 30,797,265 km (0.1 R)
• M62: 31,017,323 km (0.051 R)
• M63: 31,237,831 km (0.118 R)
• M64: 31,514,138 km (0.113 R)
• M65: 32,180,896 km (0.044 R)
• M66: 32,627,894 km (0.048 R)
• M67: 32,796,192 km (0.086 R)
• M68: 33,020,738 km (0.104 R)
• M69: 33,754,516 km (0.106 R)
• M70: 34,038,153 km (0.067 R)
• M71: 34,951,299 km (0.026 R)
• M72: 35,410,714 km (0.047 R)
• M73: 35,814,478 km (0.056 R)
• M74: 36,510,108 km (0.119 R)
• M75: 37,444,646 km (0.075 R)
• M76: 38,801,798 km (0.085 R)
• M77: 39,277,519 km (0.102 R)
• M78: 39,695,496 km (0.088 R)
• M79: 40,114,819 km (0.116 R)

Kuiper Belt

Range: 30 - 45 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 243 - 18,022 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit