🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.28 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.55 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.86

Radius: 1.52

Gravity: 1.24 G

Time & Orbit

Eccentricity (e): 0.25

Orbit Range: 0.41 AU - 0.69 AU

Year: 263 Days

Day: 35.9 Hours

Environment

Temp: -112 °C

Axial Tilt: 44.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 890.8

Radius: 12.9

Gravity: 5.35 G

Time & Orbit

Eccentricity (e): 0.133

Orbit Range: 0.63 AU - 0.83 AU

Year: 403 Days

Day: 14.6 Hours

Environment

Temp: -135 °C

Axial Tilt: 25.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 63,227,523 km

• M1: 165,605 km (0.041 R)
• M2: 252,820 km (0.03 R)
• M3: 355,445 km (0.074 R)
• M4: 454,030 km (0.053 R)
• M5: 536,458 km (0.063 R)
• M6: 704,008 km (0.088 R)
• M7: 812,167 km (0.095 R)
• M8: 904,319 km (0.074 R)
• M9: 986,299 km (0.092 R)
• M10: 1,076,057 km (0.077 R)
• M11: 1,173,745 km (0.103 R)
• M12: 1,264,551 km (0.062 R)
• M13: 1,513,182 km (0.117 R)
• M14: 1,601,744 km (0.101 R)
• M15: 1,686,267 km (0.045 R)
• M16: 1,830,779 km (0.075 R)
• M17: 1,919,640 km (0.057 R)
• M18: 2,022,114 km (0.079 R)
• M19: 2,138,801 km (0.106 R)
• M20: 2,226,465 km (0.086 R)
• M21: 2,398,802 km (0.029 R)
• M22: 2,496,489 km (0.104 R)
• M23: 2,582,358 km (0.095 R)
• M24: 2,709,666 km (0.108 R)
• M25: 2,797,929 km (0.096 R)
• M26: 3,054,789 km (0.115 R)
• M27: 3,182,545 km (0.086 R)
• M28: 3,276,044 km (0.082 R)
• M29: 3,473,064 km (0.114 R)
• M30: 3,576,735 km (0.117 R)
• M31: 3,696,563 km (0.093 R)
• M32: 3,955,816 km (0.092 R)
• M33: 4,388,005 km (0.066 R)
• M34: 4,492,424 km (0.099 R)
• M35: 4,613,898 km (0.094 R)
• M36: 5,229,343 km (0.1 R)
• M37: 5,331,668 km (0.111 R)
• M38: 5,572,969 km (0.105 R)
• M39: 5,677,389 km (0.06 R)
• M40: 5,826,687 km (0.106 R)
• M41: 5,950,555 km (0.116 R)
• M42: 6,048,541 km (0.095 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.89 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 277.5

Radius: 12

Gravity: 1.93 G

Time & Orbit

Eccentricity (e): 0.231

Orbit Range: 0.68 AU - 1.1 AU

Year: 542 Days

Day: 8.7 Hours

Environment

Temp: -152 °C

Axial Tilt: 8.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 63,227,523 km

• M1: 164,258 km (0.076 R)
• M2: 260,749 km (0.115 R)
• M3: 351,705 km (0.107 R)
• M4: 427,102 km (0.115 R)
• M5: 503,995 km (0.1 R)
• M6: 583,731 km (0.092 R)
• M7: 714,629 km (0.115 R)
• M8: 879,785 km (0.099 R)
• M9: 987,944 km (0.065 R)
• M10: 1,067,082 km (0.05 R)
• M11: 1,170,304 km (0.071 R)
• M12: 1,401,433 km (0.072 R)
• M13: 1,515,426 km (0.101 R)
• M14: 1,657,694 km (0.099 R)
• M15: 1,743,114 km (0.114 R)
• M16: 1,934,600 km (0.031 R)
• M17: 2,237,835 km (0.082 R)
• M18: 2,344,348 km (0.099 R)
• M19: 2,475,396 km (0.114 R)
• M20: 2,638,458 km (0.118 R)
• M21: 2,757,238 km (0.08 R)
• M22: 2,871,681 km (0.097 R)
• M23: 3,055,836 km (0.054 R)
• M24: 3,143,051 km (0.109 R)
• M25: 3,218,449 km (0.114 R)
• M26: 3,320,026 km (0.106 R)
• M27: 3,857,830 km (0.075 R)
• M28: 4,013,561 km (0.107 R)
• M29: 4,143,861 km (0.062 R)
• M30: 4,310,513 km (0.086 R)
• M31: 4,493,471 km (0.084 R)
• M32: 4,744,048 km (0.11 R)
• M33: 4,962,461 km (0.114 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.06 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 439.1

Radius: 10.5

Gravity: 3.98 G

Time & Orbit

Eccentricity (e): 0.243

Orbit Range: 0.8 AU - 1.32 AU

Year: 705 Days

Day: 13.9 Hours

Environment

Temp: -157 °C

Axial Tilt: 25.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (49)

Outer Limit: 63,227,523 km

• M1: 133,740 km (0.065 R)
• M2: 207,941 km (0.091 R)
• M3: 287,228 km (0.041 R)
• M4: 383,120 km (0.077 R)
• M5: 485,295 km (0.098 R)
• M6: 628,610 km (0.068 R)
• M7: 699,220 km (0.115 R)
• M8: 796,609 km (0.116 R)
• M9: 864,227 km (0.116 R)
• M10: 959,521 km (0.039 R)
• M11: 1,063,940 km (0.101 R)
• M12: 1,144,873 km (0.069 R)
• M13: 1,307,785 km (0.04 R)
• M14: 1,466,358 km (0.07 R)
• M15: 1,631,514 km (0.068 R)
• M16: 1,738,926 km (0.043 R)
• M17: 1,815,969 km (0.033 R)
• M18: 1,980,676 km (0.04 R)
• M19: 2,068,340 km (0.118 R)
• M20: 2,275,533 km (0.097 R)
• M21: 2,353,324 km (0.086 R)
• M22: 2,482,427 km (0.102 R)
• M23: 2,584,602 km (0.056 R)
• M24: 2,853,879 km (0.104 R)
• M25: 2,930,173 km (0.081 R)
• M26: 3,038,333 km (0.105 R)
• M27: 3,140,059 km (0.076 R)
• M28: 3,322,718 km (0.082 R)
• M29: 3,707,035 km (0.091 R)
• M30: 3,951,329 km (0.058 R)
• M31: 4,036,749 km (0.07 R)
• M32: 4,140,121 km (0.093 R)
• M33: 4,305,726 km (0.112 R)
• M34: 4,482,401 km (0.12 R)
• M35: 4,634,392 km (0.104 R)
• M36: 4,916,085 km (0.049 R)
• M37: 5,119,538 km (0.116 R)
• M38: 5,231,587 km (0.112 R)
• M39: 5,640,139 km (0.093 R)
• M40: 5,717,182 km (0.096 R)
• M41: 5,853,017 km (0.073 R)
• M42: 6,088,484 km (0.06 R)
• M43: 6,307,046 km (0.105 R)
• M44: 6,397,254 km (0.105 R)
• M45: 6,528,301 km (0.065 R)
• M46: 6,599,211 km (0.12 R)
• M47: 6,721,283 km (0.065 R)
• M48: 6,864,897 km (0.076 R)
• M49: 7,019,730 km (0.031 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 671

Radius: 8.6

Gravity: 9.07 G

Time & Orbit

Eccentricity (e): 0.199

Orbit Range: 1.47 AU - 2.21 AU

Year: 1612 Days

Day: 11.7 Hours

Environment

Temp: -192 °C

Axial Tilt: 105.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (64)

Outer Limit: 63,227,523 km

• M1: 120,875 km (0.087 R)
• M2: 179,667 km (0.099 R)
• M3: 245,041 km (0.076 R)
• M4: 411,693 km (0.106 R)
• M5: 497,413 km (0.055 R)
• M6: 645,515 km (0.079 R)
• M7: 747,690 km (0.037 R)
• M8: 808,576 km (0.085 R)
• M9: 887,415 km (0.073 R)
• M10: 993,928 km (0.075 R)
• M11: 1,070,373 km (0.115 R)
• M12: 1,339,499 km (0.109 R)
• M13: 1,405,472 km (0.038 R)
• M14: 1,610,122 km (0.077 R)
• M15: 1,680,433 km (0.095 R)
• M16: 1,741,618 km (0.093 R)
• M17: 1,951,055 km (0.114 R)
• M18: 2,091,677 km (0.119 R)
• M19: 2,371,425 km (0.088 R)
• M20: 2,451,909 km (0.104 R)
• M21: 2,592,082 km (0.078 R)
• M22: 2,663,291 km (0.099 R)
• M23: 2,819,621 km (0.103 R)
• M24: 2,917,308 km (0.081 R)
• M25: 3,016,342 km (0.075 R)
• M26: 3,154,122 km (0.113 R)
• M27: 3,514,353 km (0.078 R)
• M28: 3,659,613 km (0.095 R)
• M29: 3,779,889 km (0.057 R)
• M30: 4,176,324 km (0.115 R)
• M31: 4,730,434 km (0.102 R)
• M32: 4,846,971 km (0.085 R)
• M33: 4,949,745 km (0.111 R)
• M34: 5,083,036 km (0.101 R)
• M35: 5,489,793 km (0.082 R)
• M36: 5,627,722 km (0.118 R)
• M37: 5,875,905 km (0.092 R)
• M38: 5,954,145 km (0.119 R)
• M39: 6,032,833 km (0.094 R)
• M40: 6,431,063 km (0.048 R)
• M41: 6,739,534 km (0.096 R)
• M42: 6,903,942 km (0.032 R)
• M43: 6,970,064 km (0.12 R)
• M44: 7,169,628 km (0.119 R)
• M45: 7,320,422 km (0.065 R)
• M46: 7,455,509 km (0.119 R)
• M47: 7,625,452 km (0.113 R)
• M48: 8,090,851 km (0.111 R)
• M49: 9,157,634 km (0.113 R)
• M50: 9,394,597 km (0.111 R)
• M51: 9,449,649 km (0.105 R)
• M52: 9,578,303 km (0.067 R)
• M53: 9,800,306 km (0.066 R)
• M54: 9,874,656 km (0.047 R)
• M55: 10,192,851 km (0.076 R)
• M56: 10,249,399 km (0.118 R)
• M57: 11,362,257 km (0.05 R)
• M58: 11,577,529 km (0.051 R)
• M59: 11,893,330 km (0.101 R)
• M60: 12,593,747 km (0.118 R)
• M61: 12,674,680 km (0.085 R)
• M62: 12,836,993 km (0.091 R)
• M63: 13,286,984 km (0.028 R)
• M64: 13,846,330 km (0.097 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.08 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 42.3

Radius: 7.3

Gravity: 0.79 G

Time & Orbit

Eccentricity (e): 0.207

Orbit Range: 5.61 AU - 8.55 AU

Year: 12164 Days

Day: 21 Hours

Environment

Temp: -217 °C

Axial Tilt: 35.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 63,227,523 km

• M1: 345,721 km (0.062 R)
• M2: 885,769 km (0.106 R)
• M3: 1,204,861 km (0.086 R)
• M4: 1,314,816 km (0.115 R)
• M5: 1,428,211 km (0.092 R)
• M6: 1,787,545 km (0.116 R)
• M7: 1,927,718 km (0.085 R)
• M8: 2,339,412 km (0.056 R)
• M9: 2,634,269 km (0.026 R)
• M10: 2,957,251 km (0.109 R)
• M11: 3,123,604 km (0.104 R)
• M12: 3,430,728 km (0.071 R)
• M13: 4,184,701 km (0.103 R)
• M14: 4,948,847 km (0.118 R)
• M15: 5,067,179 km (0.099 R)
• M16: 6,047,195 km (0.067 R)
• M17: 6,429,567 km (0.102 R)
• M18: 7,173,068 km (0.104 R)
• M19: 7,442,045 km (0.097 R)
• M20: 8,128,849 km (0.081 R)
• M21: 8,811,763 km (0.043 R)
• M22: 9,003,548 km (0.098 R)
• M23: 9,366,622 km (0.097 R)
• M24: 9,734,483 km (0.09 R)
• M25: 11,149,380 km (0.027 R)
• M26: 11,278,782 km (0.092 R)
• M27: 13,554,465 km (0.104 R)
• M28: 13,886,871 km (0.098 R)
• M29: 15,358,166 km (0.076 R)
• M30: 16,053,946 km (0.073 R)
• M31: 16,582,326 km (0.11 R)
• M32: 18,171,354 km (0.084 R)
• M33: 20,628,649 km (0.052 R)

Planet 7 - Ice Giant

Semi-Major Axis: 8.22 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 508.3

Radius: 5.9

Gravity: 14.6 G

Time & Orbit

Eccentricity (e): 0.101

Orbit Range: 7.39 AU - 9.05 AU

Year: 15217 Days

Day: 18.9 Hours

Environment

Temp: -234 °C

Axial Tilt: 48.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 63,227,523 km

• M1: 549,323 km (0.092 R)
• M2: 2,108,432 km (0.08 R)
• M3: 2,251,298 km (0.061 R)
• M4: 2,338,664 km (0.116 R)
• M5: 2,668,377 km (0.076 R)
• M6: 3,371,038 km (0.098 R)
• M7: 3,777,346 km (0.109 R)
• M8: 4,021,640 km (0.051 R)
• M9: 4,163,458 km (0.113 R)
• M10: 4,672,839 km (0.07 R)
• M11: 5,240,264 km (0.05 R)
• M12: 5,789,438 km (0.115 R)
• M13: 5,869,323 km (0.111 R)
• M14: 5,909,415 km (0.097 R)
• M15: 6,192,753 km (0.082 R)
• M16: 6,233,594 km (0.026 R)
• M17: 6,480,580 km (0.051 R)
• M18: 6,563,607 km (0.091 R)
• M19: 6,646,933 km (0.074 R)
• M20: 6,941,640 km (0.104 R)
• M21: 7,762,634 km (0.106 R)
• M22: 10,452,553 km (0.028 R)
• M23: 10,598,860 km (0.111 R)
• M24: 10,893,418 km (0.076 R)
• M25: 11,390,531 km (0.099 R)
• M26: 11,945,839 km (0.074 R)
• M27: 12,303,677 km (0.072 R)
• M28: 12,613,344 km (0.081 R)
• M29: 12,769,076 km (0.066 R)
• M30: 14,361,695 km (0.08 R)
• M31: 15,016,036 km (0.073 R)
• M32: 15,735,751 km (0.118 R)
• M33: 15,791,701 km (0.111 R)
• M34: 16,015,649 km (0.104 R)
• M35: 16,184,395 km (0.08 R)
• M36: 16,353,590 km (0.105 R)
• M37: 16,694,075 km (0.039 R)
• M38: 16,750,922 km (0.102 R)
• M39: 19,499,783 km (0.109 R)
• M40: 19,559,772 km (0.098 R)
• M41: 20,406,047 km (0.116 R)
• M42: 20,588,856 km (0.103 R)
• M43: 21,079,238 km (0.114 R)
• M44: 21,325,924 km (0.114 R)
• M45: 22,071,520 km (0.08 R)
• M46: 22,259,266 km (0.04 R)
• M47: 22,510,440 km (0.108 R)
• M48: 24,488,573 km (0.107 R)
• M49: 24,747,826 km (0.089 R)
• M50: 25,138,576 km (0.074 R)
• M51: 25,269,175 km (0.045 R)
• M52: 26,787,892 km (0.088 R)
• M53: 27,524,662 km (0.066 R)
• M54: 28,200,246 km (0.052 R)
• M55: 30,051,370 km (0.107 R)
• M56: 30,468,150 km (0.107 R)
• M57: 30,537,713 km (0.101 R)
• M58: 31,096,760 km (0.096 R)
• M59: 31,941,539 km (0.105 R)
• M60: 32,012,299 km (0.062 R)
• M61: 32,793,798 km (0.095 R)
• M62: 33,079,530 km (0.108 R)
• M63: 33,366,159 km (0.115 R)
• M64: 33,509,773 km (0.067 R)
• M65: 33,869,706 km (0.115 R)
• M66: 35,322,152 km (0.119 R)
• M67: 37,688,042 km (0.099 R)
• M68: 38,362,579 km (0.075 R)
• M69: 39,192,548 km (0.106 R)
• M70: 39,799,766 km (0.099 R)
• M71: 40,257,236 km (0.072 R)
• M72: 40,563,313 km (0.097 R)
• M73: 41,100,519 km (0.05 R)
• M74: 41,331,498 km (0.109 R)
• M75: 42,027,128 km (0.109 R)
• M76: 42,182,261 km (0.061 R)
• M77: 42,492,976 km (0.11 R)
• M78: 43,038,709 km (0.105 R)
• M79: 43,273,278 km (0.11 R)
• M80: 44,215,745 km (0.118 R)
• M81: 44,531,397 km (0.102 R)
• M82: 45,323,816 km (0.11 R)
• M83: 48,052,930 km (0.102 R)
• M84: 48,134,012 km (0.081 R)
• M85: 48,458,640 km (0.09 R)
• M86: 49,110,288 km (0.068 R)
• M87: 50,422,411 km (0.039 R)
• M88: 50,504,690 km (0.084 R)
• M89: 50,917,281 km (0.114 R)
• M90: 51,082,587 km (0.103 R)
• M91: 54,004,981 km (0.043 R)
• M92: 54,595,893 km (0.12 R)
• M93: 55,189,048 km (0.109 R)
• M94: 55,273,870 km (0.097 R)
• M95: 56,296,222 km (0.085 R)
• M96: 57,324,558 km (0.091 R)

Planet 8 - Ice Giant

Semi-Major Axis: 9.06 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 507.1

Radius: 3.1

Gravity: 52.77 G

Time & Orbit

Eccentricity (e): 0.053

Orbit Range: 8.58 AU - 9.54 AU

Year: 17608 Days

Day: 21.1 Hours

Environment

Temp: -228 °C

Axial Tilt: 13.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 63,227,523 km

• M1: 132,245 km (0.04 R)
• M2: 154,684 km (0.075 R)
• M3: 258,954 km (0.044 R)
• M4: 400,324 km (0.093 R)
• M5: 470,186 km (0.028 R)
• M6: 1,037,760 km (0.117 R)
• M7: 1,284,896 km (0.109 R)
• M8: 1,947,465 km (0.119 R)
• M9: 1,977,085 km (0.075 R)
• M10: 2,097,063 km (0.042 R)
• M11: 2,157,800 km (0.057 R)
• M12: 2,502,772 km (0.108 R)
• M13: 2,797,630 km (0.081 R)
• M14: 3,138,115 km (0.103 R)
• M15: 3,277,989 km (0.068 R)
• M16: 3,384,053 km (0.116 R)
• M17: 3,672,777 km (0.084 R)
• M18: 3,709,429 km (0.11 R)
• M19: 3,820,131 km (0.068 R)
• M20: 5,732,740 km (0.083 R)
• M21: 6,076,067 km (0.083 R)
• M22: 6,514,538 km (0.09 R)
• M23: 6,827,497 km (0.061 R)
• M24: 7,099,616 km (0.108 R)
• M25: 7,561,125 km (0.068 R)
• M26: 7,654,474 km (0.118 R)
• M27: 7,795,395 km (0.111 R)
• M28: 8,658,575 km (0.084 R)
• M29: 8,952,984 km (0.102 R)
• M30: 9,350,615 km (0.063 R)
• M31: 9,501,260 km (0.106 R)
• M32: 10,008,995 km (0.115 R)
• M33: 10,525,557 km (0.073 R)
• M34: 11,050,795 km (0.116 R)
• M35: 11,584,410 km (0.038 R)
• M36: 12,345,564 km (0.083 R)
• M37: 12,898,927 km (0.11 R)
• M38: 13,517,065 km (0.115 R)
• M39: 13,573,763 km (0.086 R)
• M40: 13,915,444 km (0.05 R)
• M41: 14,030,036 km (0.102 R)
• M42: 14,549,291 km (0.037 R)
• M43: 15,192,412 km (0.062 R)
• M44: 15,844,808 km (0.119 R)
• M45: 16,566,767 km (0.069 R)
• M46: 17,176,678 km (0.079 R)
• M47: 17,918,085 km (0.102 R)
• M48: 18,105,082 km (0.055 R)
• M49: 20,204,389 km (0.066 R)
• M50: 22,312,223 km (0.086 R)
• M51: 22,782,559 km (0.064 R)
• M52: 23,324,103 km (0.118 R)
• M53: 25,252,420 km (0.108 R)
• M54: 26,023,896 km (0.092 R)
• M55: 30,069,322 km (0.11 R)
• M56: 30,217,424 km (0.105 R)
• M57: 30,737,575 km (0.115 R)
• M58: 31,485,714 km (0.115 R)
• M59: 32,012,897 km (0.085 R)
• M60: 32,771,209 km (0.109 R)
• M61: 33,305,423 km (0.096 R)
• M62: 35,315,121 km (0.109 R)
• M63: 35,393,211 km (0.073 R)
• M64: 35,784,409 km (0.107 R)
• M65: 36,887,394 km (0.046 R)
• M66: 37,682,208 km (0.1 R)
• M67: 38,001,599 km (0.099 R)
• M68: 39,774,633 km (0.104 R)
• M69: 41,739,452 km (0.105 R)
• M70: 43,233,635 km (0.083 R)
• M71: 47,216,678 km (0.111 R)
• M72: 47,474,884 km (0.062 R)
• M73: 48,079,260 km (0.087 R)
• M74: 48,338,962 km (0.049 R)
• M75: 49,732,167 km (0.112 R)
• M76: 49,907,196 km (0.112 R)
• M77: 51,669,309 km (0.102 R)
• M78: 52,914,861 km (0.06 R)
• M79: 54,350,253 km (0.099 R)
• M80: 56,071,526 km (0.085 R)
• M81: 56,527,500 km (0.071 R)
• M82: 57,259,483 km (0.094 R)
• M83: 58,640,570 km (0.067 R)
• M84: 59,103,276 km (0.111 R)
• M85: 59,196,027 km (0.083 R)
• M86: 59,474,429 km (0.103 R)
• M87: 59,846,179 km (0.111 R)
• M88: 60,125,628 km (0.114 R)
• M89: 60,592,224 km (0.114 R)
• M90: 60,966,368 km (0.117 R)
• M91: 61,060,017 km (0.032 R)
• M92: 61,623,103 km (0.115 R)
• M93: 62,093,588 km (0.063 R)
• M94: 62,565,270 km (0.077 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 350 - 17,643 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit