🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.31 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.61 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 840.3

Radius: 10.8

Gravity: 7.2 G

Time & Orbit

Eccentricity (e): 0.232

Orbit Range: 0.47 AU - 0.75 AU

Year: 318 Days

Day: 8.1 Hours

Environment

Temp: -144 °C

Axial Tilt: 93.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (40)

Outer Limit: 68,024,504 km

• M1: 150,645 km (0.037 R)
• M2: 249,828 km (0.053 R)
• M3: 374,743 km (0.062 R)
• M4: 458,069 km (0.075 R)
• M5: 530,025 km (0.113 R)
• M6: 616,642 km (0.089 R)
• M7: 760,855 km (0.078 R)
• M8: 877,092 km (0.071 R)
• M9: 949,797 km (0.05 R)
• M10: 1,071,719 km (0.105 R)
• M11: 1,145,770 km (0.079 R)
• M12: 1,308,533 km (0.12 R)
• M13: 1,402,480 km (0.098 R)
• M14: 1,498,821 km (0.117 R)
• M15: 1,597,406 km (0.083 R)
• M16: 1,775,428 km (0.087 R)
• M17: 1,938,639 km (0.101 R)
• M18: 2,035,728 km (0.093 R)
• M19: 2,156,753 km (0.074 R)
• M20: 2,246,212 km (0.069 R)
• M21: 2,377,260 km (0.094 R)
• M22: 2,458,192 km (0.085 R)
• M23: 2,569,643 km (0.114 R)
• M24: 2,731,059 km (0.105 R)
• M25: 2,864,949 km (0.055 R)
• M26: 2,982,533 km (0.036 R)
• M27: 3,089,046 km (0.1 R)
• M28: 3,190,474 km (0.116 R)
• M29: 3,260,934 km (0.067 R)
• M30: 3,455,561 km (0.063 R)
• M31: 3,856,484 km (0.118 R)
• M32: 4,007,278 km (0.08 R)
• M33: 4,104,367 km (0.105 R)
• M34: 4,244,241 km (0.072 R)
• M35: 4,500,203 km (0.105 R)
• M36: 4,615,543 km (0.116 R)
• M37: 4,710,089 km (0.075 R)
• M38: 4,819,894 km (0.036 R)
• M39: 4,967,696 km (0.08 R)
• M40: 5,072,116 km (0.086 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 150.2

Radius: 13.5

Gravity: 0.82 G

Time & Orbit

Eccentricity (e): 0.109

Orbit Range: 0.93 AU - 1.15 AU

Year: 707 Days

Day: 5.9 Hours

Environment

Temp: -176 °C

Axial Tilt: 20.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 68,024,504 km

• M1: 183,407 km (0.072 R)
• M2: 284,086 km (0.081 R)
• M3: 373,845 km (0.046 R)
• M4: 484,996 km (0.104 R)
• M5: 569,669 km (0.081 R)
• M6: 667,356 km (0.1 R)
• M7: 804,687 km (0.112 R)
• M8: 909,854 km (0.091 R)
• M9: 1,028,336 km (0.099 R)
• M10: 1,114,654 km (0.105 R)
• M11: 1,220,868 km (0.12 R)
• M12: 1,326,484 km (0.087 R)
• M13: 1,463,067 km (0.081 R)
• M14: 1,585,438 km (0.1 R)
• M15: 1,682,078 km (0.096 R)
• M16: 1,790,836 km (0.053 R)
• M17: 1,922,482 km (0.104 R)
• M18: 2,010,446 km (0.1 R)
• M19: 2,158,398 km (0.091 R)
• M20: 2,277,179 km (0.096 R)
• M21: 2,658,803 km (0.053 R)
• M22: 2,922,843 km (0.027 R)
• M23: 3,030,853 km (0.105 R)
• M24: 3,170,876 km (0.12 R)
• M25: 3,425,941 km (0.089 R)
• M26: 3,520,935 km (0.11 R)
• M27: 3,655,574 km (0.074 R)
• M28: 3,778,842 km (0.078 R)
• M29: 4,002,940 km (0.112 R)
• M30: 4,285,979 km (0.102 R)
• M31: 4,519,950 km (0.112 R)
• M32: 4,659,674 km (0.083 R)
• M33: 4,751,228 km (0.108 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 436.6

Radius: 11.1

Gravity: 3.54 G

Time & Orbit

Eccentricity (e): 0.179

Orbit Range: 0.85 AU - 1.23 AU

Year: 707 Days

Day: 7.9 Hours

Environment

Temp: -170 °C

Axial Tilt: 31.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 68,024,504 km

• M1: 144,960 km (0.097 R)
• M2: 220,058 km (0.11 R)
• M3: 291,566 km (0.037 R)
• M4: 387,010 km (0.12 R)
• M5: 500,405 km (0.062 R)
• M6: 572,511 km (0.097 R)
• M7: 765,941 km (0.097 R)
• M8: 861,534 km (0.093 R)
• M9: 1,028,635 km (0.108 R)
• M10: 1,108,371 km (0.051 R)
• M11: 1,326,036 km (0.107 R)
• M12: 1,425,518 km (0.086 R)
• M13: 1,503,309 km (0.062 R)
• M14: 1,607,280 km (0.058 R)
• M15: 1,694,794 km (0.079 R)
• M16: 1,777,522 km (0.118 R)
• M17: 1,894,358 km (0.11 R)
• M18: 2,007,304 km (0.104 R)
• M19: 2,081,505 km (0.103 R)
• M20: 2,170,516 km (0.067 R)
• M21: 2,345,395 km (0.112 R)
• M22: 2,431,115 km (0.073 R)
• M23: 2,517,732 km (0.067 R)
• M24: 2,590,886 km (0.072 R)
• M25: 2,769,206 km (0.072 R)
• M26: 2,882,751 km (0.063 R)
• M27: 3,044,317 km (0.108 R)
• M28: 3,746,080 km (0.084 R)
• M29: 3,897,324 km (0.105 R)
• M30: 4,302,285 km (0.105 R)
• M31: 4,541,043 km (0.094 R)
• M32: 4,648,604 km (0.04 R)
• M33: 4,747,937 km (0.04 R)
• M34: 4,820,642 km (0.117 R)
• M35: 4,893,646 km (0.046 R)
• M36: 5,059,400 km (0.062 R)
• M37: 5,180,425 km (0.09 R)
• M38: 5,321,047 km (0.037 R)
• M39: 5,425,017 km (0.113 R)
• M40: 5,587,181 km (0.098 R)
• M41: 5,750,841 km (0.044 R)
• M42: 5,857,654 km (0.094 R)
• M43: 5,935,744 km (0.103 R)
• M44: 6,162,235 km (0.095 R)
• M45: 6,331,431 km (0.088 R)
• M46: 6,838,119 km (0.063 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 664.9

Radius: 8.2

Gravity: 9.89 G

Time & Orbit

Eccentricity (e): 0.016

Orbit Range: 2.59 AU - 2.67 AU

Year: 2844 Days

Day: 14 Hours

Environment

Temp: -218 °C

Axial Tilt: 27.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 68,024,504 km

• M1: 168,597 km (0.081 R)
• M2: 253,269 km (0.088 R)
• M3: 330,312 km (0.114 R)
• M4: 402,119 km (0.072 R)
• M5: 496,515 km (0.083 R)
• M6: 572,810 km (0.103 R)
• M7: 806,781 km (0.057 R)
• M8: 972,237 km (0.118 R)
• M9: 1,103,733 km (0.063 R)
• M10: 1,276,668 km (0.088 R)
• M11: 1,446,013 km (0.074 R)
• M12: 1,508,395 km (0.054 R)
• M13: 1,571,526 km (0.088 R)
• M14: 1,713,943 km (0.08 R)
• M15: 2,039,468 km (0.083 R)
• M16: 2,209,411 km (0.099 R)
• M17: 2,325,499 km (0.114 R)
• M18: 2,384,291 km (0.086 R)
• M19: 2,563,659 km (0.077 R)
• M20: 3,176,711 km (0.104 R)
• M21: 3,291,602 km (0.111 R)
• M22: 3,391,085 km (0.117 R)
• M23: 3,491,614 km (0.057 R)
• M24: 3,678,462 km (0.095 R)
• M25: 3,851,248 km (0.03 R)
• M26: 3,903,457 km (0.12 R)
• M27: 4,008,924 km (0.105 R)
• M28: 4,133,240 km (0.102 R)
• M29: 4,240,651 km (0.05 R)
• M30: 4,385,462 km (0.085 R)
• M31: 4,829,618 km (0.027 R)
• M32: 4,980,861 km (0.111 R)
• M33: 5,095,453 km (0.059 R)
• M34: 5,307,583 km (0.047 R)
• M35: 5,444,166 km (0.116 R)
• M36: 5,720,772 km (0.059 R)
• M37: 5,860,796 km (0.053 R)
• M38: 6,042,557 km (0.107 R)
• M39: 6,164,779 km (0.093 R)
• M40: 6,226,263 km (0.115 R)
• M41: 6,287,898 km (0.113 R)
• M42: 6,536,380 km (0.1 R)
• M43: 6,915,162 km (0.102 R)
• M44: 7,279,582 km (0.08 R)
• M45: 7,366,199 km (0.059 R)
• M46: 7,716,258 km (0.079 R)
• M47: 7,982,393 km (0.046 R)
• M48: 8,251,519 km (0.063 R)
• M49: 8,364,615 km (0.111 R)
• M50: 8,569,265 km (0.099 R)
• M51: 8,752,672 km (0.117 R)
• M52: 8,891,050 km (0.082 R)
• M53: 9,357,796 km (0.085 R)
• M54: 9,665,369 km (0.102 R)
• M55: 10,048,489 km (0.059 R)
• M56: 10,144,980 km (0.06 R)
• M57: 10,534,383 km (0.09 R)
• M58: 11,554,341 km (0.119 R)
• M59: 12,037,692 km (0.1 R)
• M60: 12,475,864 km (0.107 R)
• M61: 12,553,655 km (0.096 R)
• M62: 12,657,775 km (0.112 R)
• M63: 12,735,865 km (0.094 R)
• M64: 12,866,614 km (0.101 R)
• M65: 13,821,198 km (0.106 R)
• M66: 13,874,903 km (0.112 R)
• M67: 14,009,392 km (0.072 R)
• M68: 14,198,484 km (0.07 R)
• M69: 14,935,702 km (0.117 R)
• M70: 15,046,105 km (0.115 R)
• M71: 15,212,009 km (0.112 R)
• M72: 15,657,512 km (0.05 R)
• M73: 15,713,461 km (0.086 R)
• M74: 15,769,560 km (0.03 R)
• M75: 15,938,008 km (0.118 R)
• M76: 16,418,965 km (0.072 R)
• M77: 16,704,098 km (0.097 R)
• M78: 16,761,245 km (0.111 R)
• M79: 17,831,468 km (0.037 R)
• M80: 18,065,738 km (0.117 R)
• M81: 18,626,431 km (0.113 R)
• M82: 19,013,141 km (0.095 R)
• M83: 20,403,205 km (0.073 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.92 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 537.3

Radius: 13.7

Gravity: 2.86 G

Time & Orbit

Eccentricity (e): 0

Orbit Range: 2.92 AU - 2.92 AU

Year: 3327 Days

Day: 12.1 Hours

Environment

Temp: -216 °C

Axial Tilt: 23.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 68,024,504 km

• M1: 194,627 km (0.109 R)
• M2: 290,968 km (0.086 R)
• M3: 527,332 km (0.105 R)
• M4: 620,233 km (0.054 R)
• M5: 786,885 km (0.049 R)
• M6: 1,023,848 km (0.117 R)
• M7: 1,226,403 km (0.079 R)
• M8: 1,594,414 km (0.095 R)
• M9: 1,725,013 km (0.083 R)
• M10: 2,196,695 km (0.096 R)
• M11: 2,553,785 km (0.054 R)
• M12: 2,692,612 km (0.087 R)
• M13: 2,961,888 km (0.112 R)
• M14: 3,256,746 km (0.106 R)
• M15: 3,804,723 km (0.09 R)
• M16: 4,071,605 km (0.09 R)
• M17: 4,234,817 km (0.113 R)
• M18: 4,455,773 km (0.065 R)
• M19: 4,699,617 km (0.103 R)
• M20: 5,063,888 km (0.068 R)
• M21: 5,517,169 km (0.096 R)
• M22: 5,758,920 km (0.101 R)
• M23: 5,860,796 km (0.119 R)
• M24: 6,357,760 km (0.079 R)
• M25: 6,696,749 km (0.11 R)
• M26: 6,868,487 km (0.1 R)
• M27: 7,020,030 km (0.109 R)
• M28: 7,392,678 km (0.081 R)
• M29: 8,111,496 km (0.055 R)
• M30: 8,479,357 km (0.1 R)
• M31: 8,572,257 km (0.096 R)
• M32: 9,017,909 km (0.119 R)
• M33: 9,231,685 km (0.105 R)
• M34: 9,327,278 km (0.057 R)
• M35: 9,495,276 km (0.104 R)
• M36: 9,761,261 km (0.035 R)
• M37: 10,474,544 km (0.11 R)
• M38: 11,306,757 km (0.1 R)
• M39: 11,769,612 km (0.041 R)
• M40: 12,107,853 km (0.117 R)
• M41: 12,607,959 km (0.118 R)
• M42: 13,655,742 km (0.114 R)
• M43: 14,203,869 km (0.11 R)
• M44: 14,369,773 km (0.084 R)
• M45: 14,480,625 km (0.109 R)
• M46: 14,591,926 km (0.114 R)
• M47: 14,955,299 km (0.081 R)
• M48: 15,435,060 km (0.064 R)
• M49: 15,548,754 km (0.057 R)
• M50: 15,719,744 km (0.077 R)
• M51: 15,919,906 km (0.114 R)
• M52: 16,351,945 km (0.1 R)
• M53: 16,904,709 km (0.064 R)
• M54: 17,998,718 km (0.117 R)
• M55: 18,208,305 km (0.11 R)
• M56: 18,448,858 km (0.094 R)
• M57: 18,690,459 km (0.102 R)
• M58: 18,872,220 km (0.118 R)
• M59: 18,993,843 km (0.106 R)
• M60: 19,452,062 km (0.046 R)
• M61: 19,821,269 km (0.064 R)
• M62: 20,286,070 km (0.115 R)
• M63: 20,974,369 km (0.112 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 489.6

Radius: 13.6

Gravity: 2.65 G

Time & Orbit

Eccentricity (e): 0.234

Orbit Range: 2.29 AU - 3.69 AU

Year: 3448 Days

Day: 5.4 Hours

Environment

Temp: -210 °C

Axial Tilt: 14.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (65)

Outer Limit: 68,024,504 km

• M1: 170,990 km (0.056 R)
• M2: 277,803 km (0.114 R)
• M3: 499,657 km (0.027 R)
• M4: 607,068 km (0.116 R)
• M5: 733,478 km (0.047 R)
• M6: 984,354 km (0.117 R)
• M7: 1,092,962 km (0.113 R)
• M8: 1,240,765 km (0.074 R)
• M9: 1,481,917 km (0.074 R)
• M10: 1,725,761 km (0.07 R)
• M11: 1,996,832 km (0.058 R)
• M12: 2,152,115 km (0.111 R)
• M13: 2,535,235 km (0.108 R)
• M14: 2,766,364 km (0.079 R)
• M15: 3,004,524 km (0.104 R)
• M16: 3,332,741 km (0.113 R)
• M17: 3,501,338 km (0.073 R)
• M18: 3,672,777 km (0.059 R)
• M19: 3,864,711 km (0.105 R)
• M20: 3,970,776 km (0.041 R)
• M21: 4,077,739 km (0.053 R)
• M22: 4,185,898 km (0.116 R)
• M23: 4,646,659 km (0.09 R)
• M24: 4,759,606 km (0.077 R)
• M25: 5,260,160 km (0.118 R)
• M26: 5,696,986 km (0.105 R)
• M27: 6,042,557 km (0.088 R)
• M28: 6,166,275 km (0.119 R)
• M29: 6,290,740 km (0.119 R)
• M30: 6,437,047 km (0.106 R)
• M31: 6,947,475 km (0.081 R)
• M32: 7,055,484 km (0.12 R)
• M33: 7,273,149 km (0.064 R)
• M34: 7,939,608 km (0.094 R)
• M35: 8,052,554 km (0.101 R)
• M36: 8,371,796 km (0.102 R)
• M37: 8,905,412 km (0.108 R)
• M38: 8,999,359 km (0.093 R)
• M39: 9,426,162 km (0.071 R)
• M40: 9,883,931 km (0.096 R)
• M41: 10,547,099 km (0.112 R)
• M42: 11,098,068 km (0.077 R)
• M43: 11,351,636 km (0.113 R)
• M44: 11,479,093 km (0.079 R)
• M45: 11,967,979 km (0.038 R)
• M46: 12,071,800 km (0.102 R)
• M47: 13,099,538 km (0.062 R)
• M48: 13,313,911 km (0.088 R)
• M49: 13,502,405 km (0.092 R)
• M50: 13,745,950 km (0.058 R)
• M51: 14,045,744 km (0.113 R)
• M52: 14,320,256 km (0.046 R)
• M53: 14,930,167 km (0.093 R)
• M54: 15,238,338 km (0.108 R)
• M55: 16,032,404 km (0.093 R)
• M56: 16,434,523 km (0.109 R)
• M57: 16,607,907 km (0.114 R)
• M58: 16,839,933 km (0.064 R)
• M59: 18,404,428 km (0.116 R)
• M60: 18,735,039 km (0.071 R)
• M61: 19,310,692 km (0.079 R)
• M62: 19,738,392 km (0.118 R)
• M63: 19,953,514 km (0.053 R)
• M64: 20,200,350 km (0.084 R)
• M65: 20,324,068 km (0.086 R)

Planet 7 - Ice Giant

Semi-Major Axis: 7.98 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 866.4

Radius: 5.1

Gravity: 33.31 G

Time & Orbit

Eccentricity (e): 0.161

Orbit Range: 6.7 AU - 9.26 AU

Year: 15033 Days

Day: 18.5 Hours

Environment

Temp: -233 °C

Axial Tilt: 36.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 68,024,504 km

• M1: 255,663 km (0.115 R)
• M2: 348,413 km (0.12 R)
• M3: 916,287 km (0.119 R)
• M4: 1,459,327 km (0.103 R)
• M5: 1,959,882 km (0.083 R)
• M6: 2,212,553 km (0.087 R)
• M7: 2,408,825 km (0.067 R)
• M8: 2,959,495 km (0.091 R)
• M9: 2,995,099 km (0.055 R)
• M10: 3,285,768 km (0.113 R)
• M11: 3,547,414 km (0.074 R)
• M12: 3,854,688 km (0.034 R)
• M13: 3,932,928 km (0.101 R)
• M14: 4,331,606 km (0.075 R)
• M15: 4,412,988 km (0.083 R)
• M16: 4,618,385 km (0.109 R)
• M17: 4,785,037 km (0.111 R)
• M18: 5,340,195 km (0.095 R)
• M19: 5,559,057 km (0.073 R)
• M20: 5,647,469 km (0.034 R)
• M21: 6,142,040 km (0.095 R)
• M22: 6,603,549 km (0.032 R)
• M23: 6,838,567 km (0.048 R)
• M24: 7,462,241 km (0.109 R)
• M25: 7,904,602 km (0.055 R)
• M26: 7,954,268 km (0.119 R)
• M27: 8,104,016 km (0.076 R)
• M28: 8,204,246 km (0.113 R)
• M29: 8,254,511 km (0.039 R)
• M30: 8,866,217 km (0.083 R)
• M31: 8,917,828 km (0.072 R)
• M32: 9,492,284 km (0.085 R)
• M33: 9,704,264 km (0.105 R)
• M34: 11,008,010 km (0.047 R)
• M35: 13,240,758 km (0.067 R)
• M36: 13,775,271 km (0.087 R)
• M37: 13,835,110 km (0.102 R)
• M38: 15,173,263 km (0.085 R)
• M39: 15,857,673 km (0.072 R)
• M40: 16,298,389 km (0.082 R)
• M41: 16,935,077 km (0.102 R)
• M42: 16,999,105 km (0.051 R)
• M43: 17,385,517 km (0.107 R)
• M44: 17,905,070 km (0.051 R)
• M45: 18,760,321 km (0.1 R)
• M46: 19,092,877 km (0.113 R)
• M47: 21,197,270 km (0.098 R)
• M48: 21,404,912 km (0.052 R)
• M49: 22,171,601 km (0.11 R)
• M50: 22,452,546 km (0.112 R)
• M51: 24,163,347 km (0.117 R)
• M52: 25,253,766 km (0.101 R)
• M53: 25,694,481 km (0.114 R)
• M54: 26,063,539 km (0.112 R)
• M55: 27,859,761 km (0.116 R)
• M56: 29,002,539 km (0.061 R)
• M57: 29,541,092 km (0.116 R)
• M58: 30,706,010 km (0.054 R)
• M59: 30,784,250 km (0.113 R)
• M60: 30,862,490 km (0.109 R)
• M61: 31,097,807 km (0.116 R)
• M62: 32,123,899 km (0.112 R)
• M63: 32,760,737 km (0.108 R)
• M64: 34,209,143 km (0.049 R)
• M65: 34,859,445 km (0.113 R)
• M66: 35,513,936 km (0.037 R)
• M67: 36,172,466 km (0.097 R)
• M68: 39,185,217 km (0.117 R)
• M69: 39,951,009 km (0.086 R)
• M70: 40,207,270 km (0.085 R)
• M71: 40,893,476 km (0.101 R)
• M72: 41,583,571 km (0.098 R)
• M73: 41,756,655 km (0.116 R)
• M74: 43,062,794 km (0.108 R)
• M75: 43,150,309 km (0.087 R)
• M76: 46,251,473 km (0.102 R)
• M77: 46,430,841 km (0.071 R)
• M78: 48,966,225 km (0.087 R)
• M79: 49,607,103 km (0.102 R)
• M80: 49,974,515 km (0.082 R)
• M81: 51,360,390 km (0.094 R)
• M82: 52,104,789 km (0.041 R)
• M83: 54,548,320 km (0.102 R)
• M84: 57,221,335 km (0.073 R)
• M85: 58,476,910 km (0.109 R)
• M86: 60,132,360 km (0.081 R)
• M87: 61,803,069 km (0.083 R)
• M88: 62,495,558 km (0.03 R)
• M89: 62,693,775 km (0.067 R)
• M90: 64,187,809 km (0.032 R)
• M91: 66,501,190 km (0.103 R)
• M92: 67,413,737 km (0.092 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 401 - 13,186 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit