🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.51 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 730.7

Radius: 9.5

Gravity: 8.1 G

Time & Orbit

Eccentricity (e): 0.218

Orbit Range: 0.4 AU - 0.62 AU

Year: 251 Days

Day: 12.8 Hours

Environment

Temp: -132 °C

Axial Tilt: 23.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (40)

Outer Limit: 57,557,149 km

• M1: 119,230 km (0.039 R)
• M2: 181,163 km (0.065 R)
• M3: 259,104 km (0.042 R)
• M4: 325,226 km (0.07 R)
• M5: 384,467 km (0.097 R)
• M6: 483,500 km (0.077 R)
• M7: 554,111 km (0.094 R)
• M8: 650,302 km (0.047 R)
• M9: 729,888 km (0.115 R)
• M10: 854,054 km (0.116 R)
• M11: 967,599 km (0.104 R)
• M12: 1,044,941 km (0.092 R)
• M13: 1,113,008 km (0.119 R)
• M14: 1,174,942 km (0.072 R)
• M15: 1,234,033 km (0.047 R)
• M16: 1,338,901 km (0.094 R)
• M17: 1,405,023 km (0.103 R)
• M18: 1,476,531 km (0.055 R)
• M19: 1,579,754 km (0.072 R)
• M20: 1,848,282 km (0.069 R)
• M21: 1,941,182 km (0.099 R)
• M22: 2,026,154 km (0.117 R)
• M23: 2,107,535 km (0.081 R)
• M24: 2,209,561 km (0.1 R)
• M25: 2,288,548 km (0.118 R)
• M26: 2,505,316 km (0.116 R)
• M27: 2,660,748 km (0.115 R)
• M28: 2,734,350 km (0.086 R)
• M29: 2,948,424 km (0.105 R)
• M30: 3,041,026 km (0.082 R)
• M31: 3,123,604 km (0.095 R)
• M32: 3,206,930 km (0.075 R)
• M33: 3,341,867 km (0.059 R)
• M34: 3,473,064 km (0.12 R)
• M35: 3,565,216 km (0.057 R)
• M36: 3,652,432 km (0.073 R)
• M37: 3,746,230 km (0.111 R)
• M38: 3,888,497 km (0.082 R)
• M39: 3,978,406 km (0.036 R)
• M40: 4,172,434 km (0.111 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 245.6

Radius: 10.6

Gravity: 2.19 G

Time & Orbit

Eccentricity (e): 0.202

Orbit Range: 0.64 AU - 0.96 AU

Year: 494 Days

Day: 12.5 Hours

Environment

Temp: -174 °C

Axial Tilt: 4.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 57,557,149 km

• M1: 138,378 km (0.092 R)
• M2: 272,567 km (0.053 R)
• M3: 372,648 km (0.094 R)
• M4: 452,234 km (0.102 R)
• M5: 518,207 km (0.104 R)
• M6: 603,777 km (0.055 R)
• M7: 678,426 km (0.095 R)
• M8: 749,485 km (0.075 R)
• M9: 892,800 km (0.047 R)
• M10: 960,568 km (0.047 R)
• M11: 1,049,728 km (0.048 R)
• M12: 1,133,802 km (0.057 R)
• M13: 1,343,688 km (0.074 R)
• M14: 1,444,517 km (0.109 R)
• M15: 1,566,439 km (0.104 R)
• M16: 1,644,978 km (0.091 R)
• M17: 1,772,436 km (0.087 R)
• M18: 1,869,225 km (0.091 R)
• M19: 2,027,650 km (0.049 R)
• M20: 2,118,755 km (0.109 R)
• M21: 2,315,775 km (0.055 R)
• M22: 2,384,740 km (0.119 R)
• M23: 2,508,158 km (0.026 R)
• M24: 2,578,918 km (0.095 R)
• M25: 2,644,890 km (0.108 R)
• M26: 2,789,701 km (0.074 R)
• M27: 3,029,357 km (0.09 R)
• M28: 3,116,572 km (0.066 R)
• M29: 3,204,686 km (0.062 R)
• M30: 3,287,712 km (0.034 R)
• M31: 3,359,370 km (0.057 R)
• M32: 3,443,743 km (0.098 R)
• M33: 3,547,115 km (0.115 R)
• M34: 3,651,684 km (0.092 R)
• M35: 3,744,734 km (0.115 R)
• M36: 3,819,682 km (0.112 R)
• M37: 3,920,511 km (0.066 R)
• M38: 4,047,819 km (0.101 R)
• M39: 4,124,862 km (0.098 R)
• M40: 4,228,234 km (0.079 R)
• M41: 4,424,656 km (0.097 R)
• M42: 4,504,093 km (0.116 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 348.5

Radius: 12.1

Gravity: 2.38 G

Time & Orbit

Eccentricity (e): 0.077

Orbit Range: 1.4 AU - 1.64 AU

Year: 1294 Days

Day: 13.1 Hours

Environment

Temp: -183 °C

Axial Tilt: 38.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 57,557,149 km

• M1: 160,070 km (0.073 R)
• M2: 242,498 km (0.091 R)
• M3: 340,485 km (0.083 R)
• M4: 419,323 km (0.066 R)
• M5: 546,032 km (0.119 R)
• M6: 639,082 km (0.105 R)
• M7: 721,511 km (0.025 R)
• M8: 886,367 km (0.091 R)
• M9: 967,599 km (0.072 R)
• M10: 1,058,106 km (0.085 R)
• M11: 1,227,301 km (0.067 R)
• M12: 1,376,749 km (0.109 R)
• M13: 1,540,260 km (0.098 R)
• M14: 1,624,334 km (0.097 R)
• M15: 1,813,725 km (0.106 R)
• M16: 1,985,613 km (0.091 R)
• M17: 2,293,036 km (0.089 R)
• M18: 2,461,483 km (0.078 R)
• M19: 2,643,394 km (0.057 R)
• M20: 2,782,820 km (0.097 R)
• M21: 3,186,435 km (0.075 R)
• M22: 3,295,342 km (0.081 R)
• M23: 3,639,716 km (0.119 R)
• M24: 3,722,444 km (0.089 R)
• M25: 3,900,316 km (0.041 R)
• M26: 3,985,138 km (0.105 R)
• M27: 4,113,343 km (0.092 R)
• M28: 4,232,273 km (0.094 R)
• M29: 4,330,260 km (0.111 R)
• M30: 4,707,845 km (0.05 R)
• M31: 4,889,158 km (0.037 R)
• M32: 4,969,192 km (0.1 R)
• M33: 5,282,301 km (0.1 R)
• M34: 5,364,580 km (0.085 R)
• M35: 5,733,937 km (0.116 R)
• M36: 6,013,386 km (0.108 R)
• M37: 6,852,929 km (0.119 R)
• M38: 6,955,553 km (0.088 R)
• M39: 7,045,910 km (0.086 R)
• M40: 7,188,626 km (0.081 R)
• M41: 7,437,408 km (0.108 R)
• M42: 7,569,503 km (0.079 R)
• M43: 7,715,660 km (0.092 R)
• M44: 7,795,844 km (0.059 R)
• M45: 7,889,642 km (0.111 R)
• M46: 8,010,966 km (0.114 R)
• M47: 8,337,239 km (0.1 R)
• M48: 8,419,518 km (0.074 R)
• M49: 8,543,534 km (0.082 R)
• M50: 8,654,237 km (0.063 R)
• M51: 8,765,388 km (0.105 R)
• M52: 8,919,025 km (0.113 R)
• M53: 9,087,622 km (0.041 R)
• M54: 9,200,568 km (0.118 R)
• M55: 9,299,901 km (0.097 R)
• M56: 9,442,318 km (0.081 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 584.9

Radius: 8.9

Gravity: 7.38 G

Time & Orbit

Eccentricity (e): 0.055

Orbit Range: 1.56 AU - 1.74 AU

Year: 1463 Days

Day: 11.6 Hours

Environment

Temp: -195 °C

Axial Tilt: 14.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (67)

Outer Limit: 57,557,149 km

• M1: 111,750 km (0.11 R)
• M2: 199,713 km (0.08 R)
• M3: 259,104 km (0.075 R)
• M4: 518,357 km (0.106 R)
• M5: 617,989 km (0.093 R)
• M6: 752,328 km (0.101 R)
• M7: 867,069 km (0.11 R)
• M8: 1,058,405 km (0.073 R)
• M9: 1,139,038 km (0.043 R)
• M10: 1,340,995 km (0.041 R)
• M11: 1,473,240 km (0.117 R)
• M12: 1,536,370 km (0.069 R)
• M13: 1,675,047 km (0.052 R)
• M14: 1,798,615 km (0.09 R)
• M15: 1,945,072 km (0.104 R)
• M16: 2,115,912 km (0.043 R)
• M17: 2,302,162 km (0.099 R)
• M18: 2,386,834 km (0.093 R)
• M19: 2,569,942 km (0.075 R)
• M20: 2,746,617 km (0.108 R)
• M21: 3,007,665 km (0.105 R)
• M22: 3,077,079 km (0.063 R)
• M23: 3,182,246 km (0.116 R)
• M24: 3,336,332 km (0.097 R)
• M25: 3,492,811 km (0.112 R)
• M26: 3,553,697 km (0.082 R)
• M27: 3,726,034 km (0.112 R)
• M28: 3,800,833 km (0.098 R)
• M29: 4,079,085 km (0.046 R)
• M30: 4,246,635 km (0.116 R)
• M31: 4,442,758 km (0.072 R)
• M32: 4,601,930 km (0.055 R)
• M33: 4,722,506 km (0.116 R)
• M34: 4,939,572 km (0.102 R)
• M35: 5,104,429 km (0.047 R)
• M36: 5,173,693 km (0.077 R)
• M37: 5,271,231 km (0.108 R)
• M38: 5,681,727 km (0.104 R)
• M39: 5,811,129 km (0.083 R)
• M40: 5,883,535 km (0.101 R)
• M41: 6,190,809 km (0.047 R)
• M42: 6,413,560 km (0.098 R)
• M43: 6,638,854 km (0.086 R)
• M44: 6,760,178 km (0.064 R)
• M45: 6,851,582 km (0.048 R)
• M46: 7,190,422 km (0.095 R)
• M47: 7,550,504 km (0.117 R)
• M48: 8,223,096 km (0.036 R)
• M49: 8,583,178 km (0.106 R)
• M50: 8,765,238 km (0.087 R)
• M51: 9,065,631 km (0.049 R)
• M52: 9,352,709 km (0.058 R)
• M53: 9,574,114 km (0.115 R)
• M54: 10,318,962 km (0.058 R)
• M55: 10,389,273 km (0.112 R)
• M56: 10,477,236 km (0.096 R)
• M57: 10,583,152 km (0.111 R)
• M58: 10,742,773 km (0.101 R)
• M59: 10,885,339 km (0.118 R)
• M60: 10,992,751 km (0.076 R)
• M61: 11,262,625 km (0.114 R)
• M62: 11,352,982 km (0.096 R)
• M63: 11,443,639 km (0.049 R)
• M64: 11,717,253 km (0.102 R)
• M65: 12,214,965 km (0.106 R)
• M66: 12,401,065 km (0.03 R)
• M67: 12,475,864 km (0.115 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.68 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 364

Radius: 8.7

Gravity: 4.81 G

Time & Orbit

Eccentricity (e): 0.144

Orbit Range: 1.44 AU - 1.92 AU

Year: 1503 Days

Day: 11.1 Hours

Environment

Temp: -191 °C

Axial Tilt: 17.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (65)

Outer Limit: 57,557,149 km

• M1: 113,246 km (0.091 R)
• M2: 170,392 km (0.085 R)
• M3: 256,112 km (0.074 R)
• M4: 313,856 km (0.063 R)
• M5: 483,201 km (0.051 R)
• M6: 576,999 km (0.053 R)
• M7: 695,780 km (0.1 R)
• M8: 836,551 km (0.063 R)
• M9: 896,989 km (0.104 R)
• M10: 958,922 km (0.072 R)
• M11: 1,051,224 km (0.081 R)
• M12: 1,161,478 km (0.115 R)
• M13: 1,221,915 km (0.041 R)
• M14: 1,507,498 km (0.087 R)
• M15: 1,573,919 km (0.028 R)
• M16: 1,658,292 km (0.044 R)
• M17: 1,814,173 km (0.113 R)
• M18: 1,876,107 km (0.068 R)
• M19: 2,205,821 km (0.116 R)
• M20: 2,613,774 km (0.095 R)
• M21: 2,714,304 km (0.055 R)
• M22: 3,204,536 km (0.071 R)
• M23: 3,399,612 km (0.051 R)
• M24: 3,643,307 km (0.051 R)
• M25: 3,904,355 km (0.079 R)
• M26: 4,042,882 km (0.098 R)
• M27: 4,159,718 km (0.086 R)
• M28: 4,325,024 km (0.108 R)
• M29: 4,504,541 km (0.113 R)
• M30: 4,637,833 km (0.095 R)
• M31: 4,970,539 km (0.109 R)
• M32: 5,196,731 km (0.03 R)
• M33: 5,451,945 km (0.107 R)
• M34: 5,607,078 km (0.12 R)
• M35: 5,698,332 km (0.081 R)
• M36: 5,776,871 km (0.066 R)
• M37: 6,161,637 km (0.099 R)
• M38: 6,255,734 km (0.061 R)
• M39: 6,527,404 km (0.052 R)
• M40: 6,650,822 km (0.096 R)
• M41: 6,816,726 km (0.086 R)
• M42: 6,956,002 km (0.057 R)
• M43: 7,039,926 km (0.119 R)
• M44: 7,194,910 km (0.111 R)
• M45: 7,279,881 km (0.044 R)
• M46: 7,336,728 km (0.091 R)
• M47: 7,623,208 km (0.096 R)
• M48: 7,913,279 km (0.118 R)
• M49: 8,001,093 km (0.088 R)
• M50: 8,325,570 km (0.078 R)
• M51: 8,489,530 km (0.119 R)
• M52: 8,594,398 km (0.066 R)
• M53: 8,729,784 km (0.115 R)
• M54: 8,790,221 km (0.049 R)
• M55: 9,155,838 km (0.115 R)
• M56: 9,417,784 km (0.115 R)
• M57: 9,588,476 km (0.081 R)
• M58: 9,744,656 km (0.073 R)
• M59: 9,964,864 km (0.094 R)
• M60: 10,218,283 km (0.054 R)
• M61: 10,441,931 km (0.092 R)
• M62: 10,570,436 km (0.117 R)
• M63: 10,699,539 km (0.102 R)
• M64: 10,796,628 km (0.113 R)
• M65: 10,959,091 km (0.069 R)

Planet 6 - Ice Giant

Semi-Major Axis: 6.37 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 141

Radius: 6.9

Gravity: 2.96 G

Time & Orbit

Eccentricity (e): 0.099

Orbit Range: 5.74 AU - 7 AU

Year: 11097 Days

Day: 25 Hours

Environment

Temp: -238 °C

Axial Tilt: 18.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (62)

Outer Limit: 57,557,149 km

• M1: 486,642 km (0.115 R)
• M2: 694,733 km (0.074 R)
• M3: 783,145 km (0.086 R)
• M4: 1,100,292 km (0.118 R)
• M5: 1,144,573 km (0.096 R)
• M6: 1,327,532 km (0.1 R)
• M7: 1,619,696 km (0.095 R)
• M8: 2,094,819 km (0.119 R)
• M9: 2,376,661 km (0.042 R)
• M10: 2,492,899 km (0.095 R)
• M11: 2,750,955 km (0.109 R)
• M12: 3,466,183 km (0.097 R)
• M13: 3,642,409 km (0.092 R)
• M14: 4,712,483 km (0.053 R)
• M15: 5,536,019 km (0.089 R)
• M16: 5,742,314 km (0.098 R)
• M17: 6,003,811 km (0.098 R)
• M18: 6,109,427 km (0.043 R)
• M19: 6,162,535 km (0.063 R)
• M20: 7,538,536 km (0.115 R)
• M21: 7,652,679 km (0.087 R)
• M22: 8,085,466 km (0.081 R)
• M23: 9,585,035 km (0.114 R)
• M24: 9,926,268 km (0.062 R)
• M25: 10,208,559 km (0.071 R)
• M26: 10,303,105 km (0.058 R)
• M27: 10,429,814 km (0.118 R)
• M28: 11,168,079 km (0.103 R)
• M29: 11,363,454 km (0.107 R)
• M30: 11,856,978 km (0.05 R)
• M31: 12,256,703 km (0.033 R)
• M32: 12,424,552 km (0.115 R)
• M33: 12,593,149 km (0.111 R)
• M34: 13,069,468 km (0.087 R)
• M35: 13,137,984 km (0.105 R)
• M36: 13,344,130 km (0.045 R)
• M37: 13,655,593 km (0.054 R)
• M38: 14,462,225 km (0.07 R)
• M39: 17,273,318 km (0.096 R)
• M40: 20,009,463 km (0.119 R)
• M41: 20,088,600 km (0.116 R)
• M42: 20,524,977 km (0.068 R)
• M43: 20,604,564 km (0.11 R)
• M44: 20,684,449 km (0.08 R)
• M45: 22,097,251 km (0.111 R)
• M46: 23,249,903 km (0.099 R)
• M47: 23,541,020 km (0.11 R)
• M48: 24,295,442 km (0.046 R)
• M49: 24,802,729 km (0.096 R)
• M50: 25,142,765 km (0.08 R)
• M51: 25,398,876 km (0.085 R)
• M52: 26,043,045 km (0.094 R)
• M53: 26,910,114 km (0.078 R)
• M54: 27,084,694 km (0.111 R)
• M55: 27,742,626 km (0.042 R)
• M56: 28,051,546 km (0.118 R)
• M57: 28,095,677 km (0.091 R)
• M58: 28,139,958 km (0.038 R)
• M59: 28,272,801 km (0.084 R)
• M60: 28,583,665 km (0.106 R)
• M61: 29,074,346 km (0.074 R)
• M62: 30,018,758 km (0.112 R)

Planet 7 - Ice Giant

Semi-Major Axis: 6.95 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 741.5

Radius: 5.8

Gravity: 22.04 G

Time & Orbit

Eccentricity (e): 0.073

Orbit Range: 6.44 AU - 7.46 AU

Year: 12647 Days

Day: 16.3 Hours

Environment

Temp: -236 °C

Axial Tilt: 18.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 57,557,149 km

• M1: 73,901 km (0.094 R)
• M2: 401,221 km (0.119 R)
• M3: 514,916 km (0.113 R)
• M4: 1,496,727 km (0.105 R)
• M5: 2,313,980 km (0.091 R)
• M6: 2,431,863 km (0.074 R)
• M7: 2,955,306 km (0.072 R)
• M8: 3,411,729 km (0.081 R)
• M9: 3,580,027 km (0.038 R)
• M10: 3,648,243 km (0.088 R)
• M11: 3,889,993 km (0.114 R)
• M12: 3,995,161 km (0.109 R)
• M13: 4,795,509 km (0.113 R)
• M14: 5,683,373 km (0.073 R)
• M15: 7,344,208 km (0.048 R)
• M16: 7,737,202 km (0.081 R)
• M17: 7,958,457 km (0.088 R)
• M18: 8,226,836 km (0.071 R)
• M19: 8,407,400 km (0.049 R)
• M20: 8,543,684 km (0.052 R)
• M21: 8,910,648 km (0.041 R)
• M22: 9,003,099 km (0.074 R)
• M23: 9,095,999 km (0.086 R)
• M24: 9,235,873 km (0.114 R)
• M25: 9,802,700 km (0.106 R)
• M26: 11,619,865 km (0.086 R)
• M27: 11,670,429 km (0.098 R)
• M28: 15,108,338 km (0.03 R)
• M29: 15,551,746 km (0.116 R)
• M30: 15,607,396 km (0.075 R)
• M31: 16,224,637 km (0.063 R)
• M32: 16,735,663 km (0.034 R)
• M33: 17,309,521 km (0.119 R)
• M34: 18,065,289 km (0.091 R)
• M35: 19,789,554 km (0.097 R)
• M36: 20,152,778 km (0.111 R)
• M37: 20,213,515 km (0.084 R)
• M38: 20,335,138 km (0.109 R)
• M39: 20,701,802 km (0.088 R)
• M40: 21,379,480 km (0.098 R)
• M41: 21,627,663 km (0.101 R)
• M42: 22,378,196 km (0.118 R)
• M43: 22,567,138 km (0.104 R)
• M44: 23,137,106 km (0.118 R)
• M45: 23,711,861 km (0.04 R)
• M46: 23,776,038 km (0.032 R)
• M47: 23,968,870 km (0.1 R)
• M48: 24,810,208 km (0.097 R)
• M49: 24,940,508 km (0.096 R)
• M50: 25,071,107 km (0.093 R)
• M51: 26,057,406 km (0.062 R)
• M52: 26,588,628 km (0.074 R)
• M53: 26,655,349 km (0.104 R)
• M54: 26,721,920 km (0.097 R)
• M55: 26,788,790 km (0.052 R)
• M56: 26,922,381 km (0.095 R)
• M57: 27,123,440 km (0.096 R)
• M58: 27,729,312 km (0.117 R)
• M59: 27,796,930 km (0.077 R)
• M60: 29,780,747 km (0.108 R)
• M61: 29,850,011 km (0.09 R)
• M62: 30,196,929 km (0.115 R)
• M63: 30,266,492 km (0.052 R)
• M64: 31,739,283 km (0.066 R)
• M65: 32,022,471 km (0.05 R)
• M66: 32,591,243 km (0.102 R)
• M67: 34,608,271 km (0.092 R)
• M68: 36,665,541 km (0.061 R)
• M69: 37,708,836 km (0.106 R)
• M70: 37,933,682 km (0.099 R)
• M71: 38,158,976 km (0.036 R)
• M72: 38,384,719 km (0.051 R)
• M73: 38,460,117 km (0.091 R)
• M74: 38,610,911 km (0.104 R)
• M75: 38,686,458 km (0.099 R)
• M76: 39,216,184 km (0.12 R)
• M77: 39,444,022 km (0.05 R)
• M78: 41,205,088 km (0.068 R)
• M79: 41,359,473 km (0.116 R)
• M80: 41,823,526 km (0.073 R)
• M81: 42,133,941 km (0.096 R)
• M82: 44,091,429 km (0.115 R)
• M83: 45,120,962 km (0.106 R)
• M84: 45,439,306 km (0.099 R)
• M85: 45,678,513 km (0.08 R)
• M86: 46,479,161 km (0.084 R)
• M87: 46,800,647 km (0.071 R)
• M88: 47,203,514 km (0.107 R)
• M89: 47,526,795 km (0.109 R)
• M90: 47,607,727 km (0.105 R)
• M91: 48,012,988 km (0.112 R)
• M92: 50,385,909 km (0.08 R)
• M93: 52,127,827 km (0.089 R)
• M94: 53,552,447 km (0.115 R)

Kuiper Belt

Range: 30 - 51 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 473 - 10,731 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit