🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 1.44 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 672.3

Radius: 8

Gravity: 10.5 G

Time & Orbit

Eccentricity (e): 0.004

Orbit Range: 1.43 AU - 1.45 AU

Year: 1099 Days

Day: 7.6 Hours

Environment

Temp: -180 °C

Axial Tilt: 26.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (66)

Outer Limit: 58,471,961 km

• M1: 101,278 km (0.078 R)
• M2: 167,400 km (0.073 R)
• M3: 270,772 km (0.051 R)
• M4: 353,799 km (0.084 R)
• M5: 452,234 km (0.091 R)
• M6: 560,842 km (0.106 R)
• M7: 624,721 km (0.085 R)
• M8: 722,259 km (0.069 R)
• M9: 779,555 km (0.072 R)
• M10: 898,934 km (0.101 R)
• M11: 1,097,151 km (0.107 R)
• M12: 1,194,090 km (0.119 R)
• M13: 1,262,756 km (0.097 R)
• M14: 1,325,138 km (0.07 R)
• M15: 1,444,816 km (0.028 R)
• M16: 1,543,252 km (0.034 R)
• M17: 1,781,711 km (0.077 R)
• M18: 1,923,380 km (0.115 R)
• M19: 2,105,590 km (0.116 R)
• M20: 2,189,514 km (0.113 R)
• M21: 2,360,804 km (0.113 R)
• M22: 2,448,020 km (0.109 R)
• M23: 2,566,052 km (0.106 R)
• M24: 2,665,984 km (0.063 R)
• M25: 2,726,421 km (0.038 R)
• M26: 2,983,730 km (0.058 R)
• M27: 3,067,804 km (0.115 R)
• M28: 3,357,126 km (0.115 R)
• M29: 3,455,561 km (0.117 R)
• M30: 3,722,743 km (0.104 R)
• M31: 3,847,508 km (0.115 R)
• M32: 4,089,557 km (0.093 R)
• M33: 4,265,484 km (0.097 R)
• M34: 4,336,543 km (0.06 R)
• M35: 4,503,943 km (0.11 R)
• M36: 4,710,089 km (0.038 R)
• M37: 4,808,225 km (0.064 R)
• M38: 5,006,442 km (0.105 R)
• M39: 5,106,673 km (0.078 R)
• M40: 5,270,782 km (0.053 R)
• M41: 5,321,645 km (0.1 R)
• M42: 5,578,505 km (0.094 R)
• M43: 5,918,391 km (0.068 R)
• M44: 6,238,082 km (0.071 R)
• M45: 6,305,401 km (0.053 R)
• M46: 6,440,936 km (0.081 R)
• M47: 6,908,430 km (0.062 R)
• M48: 7,174,564 km (0.071 R)
• M49: 7,415,417 km (0.101 R)
• M50: 7,630,239 km (0.094 R)
• M51: 7,847,156 km (0.095 R)
• M52: 7,992,865 km (0.109 R)
• M53: 8,139,471 km (0.117 R)
• M54: 8,242,693 km (0.072 R)
• M55: 8,495,065 km (0.106 R)
• M56: 8,749,979 km (0.103 R)
• M57: 8,855,745 km (0.116 R)
• M58: 8,931,442 km (0.109 R)
• M59: 9,037,955 km (0.117 R)
• M60: 9,175,436 km (0.098 R)
• M61: 9,483,308 km (0.03 R)
• M62: 9,576,508 km (0.114 R)
• M63: 9,841,745 km (0.106 R)
• M64: 10,109,525 km (0.075 R)
• M65: 10,268,099 km (0.046 R)
• M66: 10,539,768 km (0.083 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 934.7

Radius: 10.9

Gravity: 7.87 G

Time & Orbit

Eccentricity (e): 0.205

Orbit Range: 1.52 AU - 2.3 AU

Year: 1678 Days

Day: 5.9 Hours

Environment

Temp: -197 °C

Axial Tilt: 32.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 58,471,961 km

• M1: 171,140 km (0.094 R)
• M2: 320,289 km (0.061 R)
• M3: 439,070 km (0.072 R)
• M4: 583,132 km (0.096 R)
• M5: 777,460 km (0.118 R)
• M6: 870,211 km (0.11 R)
• M7: 1,210,696 km (0.119 R)
• M8: 1,289,833 km (0.108 R)
• M9: 1,712,447 km (0.104 R)
• M10: 1,847,534 km (0.097 R)
• M11: 2,116,660 km (0.108 R)
• M12: 2,249,952 km (0.057 R)
• M13: 2,386,086 km (0.052 R)
• M14: 2,461,483 km (0.046 R)
• M15: 2,588,941 km (0.111 R)
• M16: 2,731,956 km (0.093 R)
• M17: 3,218,000 km (0.089 R)
• M18: 3,329,749 km (0.104 R)
• M19: 3,687,438 km (0.104 R)
• M20: 3,789,763 km (0.058 R)
• M21: 3,907,945 km (0.064 R)
• M22: 4,012,364 km (0.105 R)
• M23: 4,087,612 km (0.075 R)
• M24: 4,208,786 km (0.066 R)
• M25: 4,285,231 km (0.111 R)
• M26: 4,377,533 km (0.041 R)
• M27: 4,532,965 km (0.119 R)
• M28: 4,849,215 km (0.119 R)
• M29: 4,961,713 km (0.116 R)
• M30: 5,172,795 km (0.114 R)
• M31: 5,287,686 km (0.084 R)
• M32: 5,453,291 km (0.061 R)
• M33: 6,412,662 km (0.099 R)
• M34: 6,947,924 km (0.096 R)
• M35: 7,056,831 km (0.094 R)
• M36: 7,221,089 km (0.087 R)
• M37: 7,349,743 km (0.11 R)
• M38: 7,609,296 km (0.102 R)
• M39: 7,890,839 km (0.093 R)
• M40: 8,214,120 km (0.087 R)
• M41: 9,110,510 km (0.116 R)
• M42: 9,329,522 km (0.061 R)
• M43: 9,449,649 km (0.108 R)
• M44: 9,711,894 km (0.074 R)
• M45: 9,956,037 km (0.079 R)
• M46: 10,119,847 km (0.107 R)
• M47: 10,491,897 km (0.115 R)
• M48: 10,721,530 km (0.085 R)
• M49: 10,868,585 km (0.069 R)
• M50: 11,463,086 km (0.058 R)
• M51: 11,548,956 km (0.045 R)
• M52: 11,829,302 km (0.12 R)
• M53: 11,916,069 km (0.071 R)
• M54: 12,418,867 km (0.095 R)
• M55: 12,506,980 km (0.092 R)
• M56: 12,772,816 km (0.098 R)
• M57: 13,422,669 km (0.046 R)
• M58: 13,558,504 km (0.116 R)
• M59: 13,717,526 km (0.094 R)
• M60: 13,785,893 km (0.104 R)
• M61: 14,014,478 km (0.083 R)
• M62: 14,198,334 km (0.119 R)
• M63: 14,267,448 km (0.111 R)
• M64: 14,498,726 km (0.085 R)
• M65: 14,568,439 km (0.108 R)
• M66: 14,684,677 km (0.106 R)
• M67: 14,988,510 km (0.075 R)
• M68: 15,483,679 km (0.102 R)
• M69: 15,578,673 km (0.117 R)
• M70: 15,816,833 km (0.11 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.18 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 193.1

Radius: 14.6

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.242

Orbit Range: 1.65 AU - 2.71 AU

Year: 2047 Days

Day: 5.4 Hours

Environment

Temp: -194 °C

Axial Tilt: 85.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 58,471,961 km

• M1: 221,405 km (0.093 R)
• M2: 461,809 km (0.066 R)
• M3: 638,933 km (0.028 R)
• M4: 743,801 km (0.074 R)
• M5: 927,208 km (0.104 R)
• M6: 1,035,666 km (0.089 R)
• M7: 1,207,105 km (0.045 R)
• M8: 1,327,083 km (0.095 R)
• M9: 1,427,762 km (0.076 R)
• M10: 1,531,284 km (0.092 R)
• M11: 1,637,498 km (0.045 R)
• M12: 1,763,310 km (0.054 R)
• M13: 1,883,886 km (0.083 R)
• M14: 1,980,526 km (0.12 R)
• M15: 2,079,111 km (0.077 R)
• M16: 2,216,292 km (0.115 R)
• M17: 2,366,040 km (0.109 R)
• M18: 2,577,571 km (0.113 R)
• M19: 2,676,007 km (0.073 R)
• M20: 2,835,927 km (0.091 R)
• M21: 3,282,177 km (0.104 R)
• M22: 3,421,602 km (0.036 R)
• M23: 3,717,507 km (0.081 R)
• M24: 3,829,257 km (0.068 R)
• M25: 4,033,308 km (0.065 R)
• M26: 4,148,349 km (0.088 R)
• M27: 4,440,663 km (0.071 R)
• M28: 4,631,251 km (0.036 R)
• M29: 4,922,518 km (0.106 R)
• M30: 5,320,299 km (0.052 R)
• M31: 5,497,572 km (0.073 R)
• M32: 5,651,209 km (0.1 R)
• M33: 5,806,193 km (0.066 R)
• M34: 5,975,837 km (0.093 R)
• M35: 6,266,505 km (0.12 R)
• M36: 6,779,925 km (0.083 R)
• M37: 6,889,730 km (0.038 R)
• M38: 7,097,222 km (0.044 R)
• M39: 7,391,332 km (0.113 R)
• M40: 7,760,988 km (0.111 R)
• M41: 8,006,029 km (0.08 R)
• M42: 8,209,632 km (0.12 R)
• M43: 8,696,723 km (0.086 R)
• M44: 8,936,378 km (0.088 R)
• M45: 9,102,282 km (0.089 R)
• M46: 9,193,388 km (0.117 R)
• M47: 9,330,419 km (0.107 R)
• M48: 9,468,049 km (0.118 R)
• M49: 9,560,351 km (0.101 R)
• M50: 9,792,078 km (0.051 R)
• M51: 9,994,484 km (0.04 R)
• M52: 10,088,432 km (0.083 R)
• M53: 10,292,932 km (0.049 R)
• M54: 10,498,779 km (0.081 R)
• M55: 10,721,979 km (0.113 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 467.4

Radius: 10.3

Gravity: 4.41 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 2.92 AU - 3.12 AU

Year: 3337 Days

Day: 11.8 Hours

Environment

Temp: -199 °C

Axial Tilt: 18 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 58,471,961 km

• M1: 168,896 km (0.104 R)
• M2: 395,387 km (0.115 R)
• M3: 619,186 km (0.116 R)
• M4: 925,113 km (0.106 R)
• M5: 1,106,575 km (0.074 R)
• M6: 1,431,352 km (0.112 R)
• M7: 1,655,899 km (0.095 R)
• M8: 1,798,765 km (0.094 R)
• M9: 1,918,892 km (0.067 R)
• M10: 2,097,213 km (0.104 R)
• M11: 2,238,283 km (0.117 R)
• M12: 2,367,835 km (0.055 R)
• M13: 2,440,988 km (0.092 R)
• M14: 2,680,046 km (0.093 R)
• M15: 3,085,007 km (0.113 R)
• M16: 3,181,348 km (0.109 R)
• M17: 3,360,417 km (0.072 R)
• M18: 3,426,390 km (0.101 R)
• M19: 3,626,851 km (0.092 R)
• M20: 3,728,577 km (0.07 R)
• M21: 3,865,759 km (0.05 R)
• M22: 4,039,591 km (0.1 R)
• M23: 4,341,181 km (0.11 R)
• M24: 4,742,253 km (0.06 R)
• M25: 4,947,202 km (0.078 R)
• M26: 5,424,120 km (0.056 R)
• M27: 5,638,793 km (0.071 R)
• M28: 5,895,951 km (0.08 R)
• M29: 6,036,124 km (0.076 R)
• M30: 6,238,082 km (0.091 R)
• M31: 6,504,216 km (0.097 R)
• M32: 7,026,462 km (0.058 R)
• M33: 7,432,321 km (0.101 R)
• M34: 7,956,064 km (0.102 R)
• M35: 8,379,126 km (0.099 R)
• M36: 9,085,079 km (0.111 R)
• M37: 9,247,243 km (0.106 R)
• M38: 9,456,979 km (0.11 R)
• M39: 9,976,532 km (0.05 R)
• M40: 10,048,040 km (0.072 R)
• M41: 10,505,361 km (0.085 R)
• M42: 10,822,060 km (0.06 R)
• M43: 10,993,948 km (0.082 R)
• M44: 11,415,215 km (0.107 R)
• M45: 11,490,164 km (0.107 R)
• M46: 11,942,847 km (0.033 R)
• M47: 12,248,026 km (0.084 R)
• M48: 12,684,703 km (0.029 R)
• M49: 12,839,985 km (0.058 R)
• M50: 13,178,675 km (0.106 R)
• M51: 13,309,872 km (0.111 R)
• M52: 13,785,294 km (0.101 R)
• M53: 15,410,077 km (0.075 R)
• M54: 15,993,060 km (0.119 R)
• M55: 16,104,959 km (0.112 R)
• M56: 16,781,590 km (0.119 R)
• M57: 17,180,567 km (0.103 R)
• M58: 17,352,455 km (0.112 R)
• M59: 17,467,496 km (0.072 R)
• M60: 17,784,943 km (0.07 R)
• M61: 17,871,710 km (0.05 R)
• M62: 18,250,043 km (0.049 R)
• M63: 18,396,200 km (0.073 R)
• M64: 18,572,127 km (0.113 R)
• M65: 18,748,652 km (0.107 R)
• M66: 18,925,627 km (0.086 R)
• M67: 19,221,980 km (0.104 R)
• M68: 19,490,059 km (0.112 R)
• M69: 19,609,588 km (0.077 R)
• M70: 19,699,347 km (0.059 R)
• M71: 19,939,451 km (0.097 R)

Asteroid Belt

Center: 4.09 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 5 - Gas Giant

Semi-Major Axis: 5.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 346.2

Radius: 12

Gravity: 2.4 G

Time & Orbit

Eccentricity (e): 0.237

Orbit Range: 3.93 AU - 6.37 AU

Year: 7431 Days

Day: 14.9 Hours

Environment

Temp: -211 °C

Axial Tilt: 27.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 58,471,961 km

• M1: 218,263 km (0.116 R)
• M2: 311,164 km (0.056 R)
• M3: 408,103 km (0.106 R)
• M4: 654,042 km (0.101 R)
• M5: 776,712 km (0.088 R)
• M6: 881,281 km (0.101 R)
• M7: 990,936 km (0.087 R)
• M8: 1,255,725 km (0.11 R)
• M9: 1,627,326 km (0.088 R)
• M10: 1,888,374 km (0.095 R)
• M11: 2,107,086 km (0.096 R)
• M12: 2,200,734 km (0.049 R)
• M13: 2,334,325 km (0.098 R)
• M14: 2,451,012 km (0.061 R)
• M15: 2,569,792 km (0.087 R)
• M16: 2,895,916 km (0.083 R)
• M17: 3,587,955 km (0.048 R)
• M18: 3,723,341 km (0.112 R)
• M19: 3,814,596 km (0.085 R)
• M20: 4,892,449 km (0.057 R)
• M21: 5,322,991 km (0.112 R)
• M22: 5,608,275 km (0.07 R)
• M23: 5,818,908 km (0.042 R)
• M24: 5,898,644 km (0.047 R)
• M25: 6,085,941 km (0.093 R)
• M26: 6,826,899 km (0.055 R)
• M27: 7,567,408 km (0.073 R)
• M28: 7,683,646 km (0.072 R)
• M29: 7,976,708 km (0.102 R)
• M30: 8,333,499 km (0.082 R)
• M31: 8,574,202 km (0.114 R)
• M32: 8,908,852 km (0.111 R)
• M33: 9,372,307 km (0.1 R)
• M34: 10,066,291 km (0.09 R)
• M35: 10,711,507 km (0.098 R)
• M36: 11,270,404 km (0.036 R)
• M37: 11,370,037 km (0.061 R)
• M38: 11,503,478 km (0.064 R)
• M39: 11,872,685 km (0.086 R)
• M40: 12,177,865 km (0.087 R)
• M41: 12,451,180 km (0.062 R)
• M42: 12,588,661 km (0.074 R)
• M43: 13,108,663 km (0.113 R)
• M44: 13,283,543 km (0.103 R)
• M45: 13,529,631 km (0.118 R)
• M46: 13,635,547 km (0.097 R)
• M47: 14,928,671 km (0.091 R)
• M48: 15,405,140 km (0.038 R)
• M49: 16,410,886 km (0.112 R)
• M50: 16,712,925 km (0.104 R)
• M51: 17,591,662 km (0.119 R)
• M52: 18,017,119 km (0.082 R)
• M53: 18,839,009 km (0.113 R)
• M54: 19,115,766 km (0.051 R)
• M55: 20,844,818 km (0.11 R)
• M56: 21,171,988 km (0.091 R)
• M57: 21,418,526 km (0.118 R)
• M58: 21,748,688 km (0.064 R)
• M59: 22,122,234 km (0.075 R)
• M60: 22,623,536 km (0.11 R)
• M61: 23,382,446 km (0.073 R)
• M62: 24,235,453 km (0.081 R)
• M63: 24,321,323 km (0.115 R)
• M64: 24,795,398 km (0.057 R)
• M65: 25,185,550 km (0.108 R)
• M66: 25,272,615 km (0.111 R)
• M67: 25,840,489 km (0.1 R)
• M68: 26,059,949 km (0.113 R)
• M69: 26,236,026 km (0.118 R)
• M70: 26,368,270 km (0.041 R)
• M71: 27,077,663 km (0.047 R)
• M72: 27,211,404 km (0.11 R)
• M73: 28,018,335 km (0.069 R)
• M74: 28,334,286 km (0.076 R)
• M75: 28,424,792 km (0.099 R)
• M76: 29,106,360 km (0.105 R)
• M77: 29,747,537 km (0.11 R)
• M78: 29,839,539 km (0.082 R)
• M79: 30,857,403 km (0.047 R)
• M80: 30,950,453 km (0.093 R)
• M81: 31,183,676 km (0.09 R)
• M82: 31,277,025 km (0.091 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.73 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 462.3

Radius: 7.7

Gravity: 7.8 G

Time & Orbit

Eccentricity (e): 0.244

Orbit Range: 6.6 AU - 10.86 AU

Year: 16400 Days

Day: 17.6 Hours

Environment

Temp: -222 °C

Axial Tilt: 106.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 58,471,961 km

• M1: 97,538 km (0.099 R)
• M2: 286,181 km (0.045 R)
• M3: 1,441,525 km (0.097 R)
• M4: 1,619,696 km (0.12 R)
• M5: 1,778,120 km (0.104 R)
• M6: 2,110,377 km (0.091 R)
• M7: 2,225,418 km (0.107 R)
• M8: 2,283,911 km (0.115 R)
• M9: 2,492,151 km (0.074 R)
• M10: 2,769,057 km (0.096 R)
• M11: 2,832,037 km (0.113 R)
• M12: 3,219,496 km (0.104 R)
• M13: 4,703,207 km (0.092 R)
• M14: 4,778,605 km (0.037 R)
• M15: 4,930,447 km (0.117 R)
• M16: 5,317,157 km (0.067 R)
• M17: 5,395,546 km (0.118 R)
• M18: 6,576,921 km (0.094 R)
• M19: 6,873,723 km (0.082 R)
• M20: 7,480,492 km (0.074 R)
• M21: 7,612,736 km (0.1 R)
• M22: 8,014,257 km (0.059 R)
• M23: 8,149,643 km (0.098 R)
• M24: 8,240,300 km (0.072 R)
• M25: 8,331,255 km (0.102 R)
• M26: 8,514,213 km (0.105 R)
• M27: 8,652,442 km (0.104 R)
• M28: 9,496,772 km (0.088 R)
• M29: 9,977,131 km (0.098 R)
• M30: 10,318,214 km (0.086 R)
• M31: 10,811,887 km (0.108 R)
• M32: 12,391,042 km (0.085 R)
• M33: 12,443,252 km (0.117 R)
• M34: 12,547,671 km (0.105 R)
• M35: 12,915,682 km (0.08 R)
• M36: 13,662,474 km (0.099 R)
• M37: 15,309,098 km (0.113 R)
• M38: 15,758,789 km (0.109 R)
• M39: 15,928,583 km (0.053 R)
• M40: 16,613,592 km (0.074 R)
• M41: 16,671,037 km (0.097 R)
• M42: 18,130,514 km (0.08 R)
• M43: 18,189,755 km (0.039 R)
• M44: 18,367,776 km (0.089 R)
• M45: 18,665,925 km (0.103 R)
• M46: 19,146,134 km (0.055 R)
• M47: 20,241,489 km (0.095 R)
• M48: 21,922,371 km (0.105 R)
• M49: 22,302,051 km (0.066 R)
• M50: 22,939,487 km (0.116 R)
• M51: 23,003,515 km (0.104 R)
• M52: 23,131,870 km (0.077 R)
• M53: 24,428,285 km (0.072 R)
• M54: 27,362,348 km (0.073 R)
• M55: 27,498,333 km (0.118 R)
• M56: 27,771,050 km (0.105 R)
• M57: 27,907,632 km (0.085 R)
• M58: 28,732,365 km (0.069 R)
• M59: 29,425,752 km (0.106 R)
• M60: 33,263,984 km (0.102 R)
• M61: 33,481,799 km (0.088 R)
• M62: 34,064,931 km (0.088 R)
• M63: 37,331,700 km (0.081 R)
• M64: 37,482,644 km (0.118 R)
• M65: 37,558,191 km (0.092 R)
• M66: 38,163,913 km (0.104 R)
• M67: 38,773,075 km (0.12 R)
• M68: 39,538,867 km (0.069 R)
• M69: 39,692,653 km (0.032 R)
• M70: 40,078,018 km (0.091 R)
• M71: 41,397,321 km (0.099 R)
• M72: 41,631,591 km (0.061 R)
• M73: 42,573,160 km (0.034 R)
• M74: 42,888,662 km (0.088 R)
• M75: 43,760,070 km (0.065 R)
• M76: 43,839,656 km (0.038 R)
• M77: 44,637,312 km (0.117 R)
• M78: 47,466,956 km (0.117 R)
• M79: 48,039,915 km (0.108 R)
• M80: 48,121,895 km (0.115 R)
• M81: 48,614,970 km (0.102 R)
• M82: 49,523,478 km (0.096 R)
• M83: 50,354,194 km (0.082 R)
• M84: 52,789,199 km (0.102 R)
• M85: 54,148,894 km (0.088 R)
• M86: 55,606,277 km (0.117 R)
• M87: 56,642,840 km (0.086 R)
• M88: 57,511,405 km (0.109 R)
• M89: 57,860,118 km (0.104 R)

Kuiper Belt

Range: 30 - 53 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 434 - 13,293 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit