🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.3 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 280.7

Radius: 8.9

Gravity: 3.54 G

Time & Orbit

Eccentricity (e): 0.176

Orbit Range: 0.49 AU - 0.71 AU

Year: 315 Days

Day: 12.8 Hours

Environment

Temp: -145 °C

Axial Tilt: 34.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 60,790,670 km

• M1: 114,143 km (0.086 R)
• M2: 208,240 km (0.102 R)
• M3: 289,023 km (0.096 R)
• M4: 364,869 km (0.074 R)
• M5: 437,275 km (0.099 R)
• M6: 510,278 km (0.07 R)
• M7: 572,212 km (0.059 R)
• M8: 704,756 km (0.065 R)
• M9: 787,034 km (0.099 R)
• M10: 965,205 km (0.103 R)
• M11: 1,184,516 km (0.106 R)
• M12: 1,316,760 km (0.102 R)
• M13: 1,375,403 km (0.12 R)
• M14: 1,438,832 km (0.091 R)
• M15: 1,603,689 km (0.109 R)
• M16: 1,718,431 km (0.062 R)
• M17: 1,790,986 km (0.087 R)
• M18: 1,856,510 km (0.115 R)
• M19: 1,973,046 km (0.083 R)
• M20: 2,036,476 km (0.095 R)
• M21: 2,104,992 km (0.078 R)
• M22: 2,226,764 km (0.104 R)
• M23: 2,404,786 km (0.067 R)
• M24: 2,518,480 km (0.078 R)
• M25: 2,582,807 km (0.097 R)
• M26: 2,851,036 km (0.097 R)
• M27: 2,908,631 km (0.059 R)
• M28: 3,029,955 km (0.112 R)
• M29: 3,103,557 km (0.112 R)
• M30: 3,212,614 km (0.096 R)
• M31: 3,277,689 km (0.114 R)
• M32: 3,383,754 km (0.11 R)
• M33: 3,501,189 km (0.073 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 904.4

Radius: 11.9

Gravity: 6.39 G

Time & Orbit

Eccentricity (e): 0.12

Orbit Range: 0.83 AU - 1.05 AU

Year: 618 Days

Day: 8 Hours

Environment

Temp: -181 °C

Axial Tilt: 9.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (48)

Outer Limit: 60,790,670 km

• M1: 148,251 km (0.119 R)
• M2: 263,741 km (0.098 R)
• M3: 362,326 km (0.081 R)
• M4: 458,667 km (0.12 R)
• M5: 548,426 km (0.079 R)
• M6: 744,100 km (0.111 R)
• M7: 821,891 km (0.112 R)
• M8: 913,744 km (0.103 R)
• M9: 1,120,937 km (0.043 R)
• M10: 1,249,292 km (0.092 R)
• M11: 1,363,285 km (0.038 R)
• M12: 1,448,107 km (0.104 R)
• M13: 1,609,374 km (0.117 R)
• M14: 1,699,282 km (0.076 R)
• M15: 1,826,740 km (0.053 R)
• M16: 2,061,459 km (0.113 R)
• M17: 2,259,526 km (0.063 R)
• M18: 2,568,745 km (0.083 R)
• M19: 2,683,038 km (0.069 R)
• M20: 2,757,538 km (0.108 R)
• M21: 2,841,013 km (0.059 R)
• M22: 3,079,622 km (0.07 R)
• M23: 3,183,891 km (0.063 R)
• M24: 3,298,184 km (0.093 R)
• M25: 3,521,983 km (0.099 R)
• M26: 3,667,841 km (0.076 R)
• M27: 3,843,768 km (0.101 R)
• M28: 3,984,539 km (0.092 R)
• M29: 4,060,385 km (0.059 R)
• M30: 4,165,553 km (0.069 R)
• M31: 4,252,170 km (0.098 R)
• M32: 4,476,567 km (0.103 R)
• M33: 4,555,405 km (0.04 R)
• M34: 4,764,842 km (0.107 R)
• M35: 4,926,707 km (0.071 R)
• M36: 5,038,905 km (0.086 R)
• M37: 5,507,146 km (0.071 R)
• M38: 5,891,912 km (0.113 R)
• M39: 6,000,371 km (0.077 R)
• M40: 6,241,373 km (0.109 R)
• M41: 6,687,623 km (0.027 R)
• M42: 6,914,713 km (0.059 R)
• M43: 7,109,639 km (0.07 R)
• M44: 7,306,510 km (0.08 R)
• M45: 7,693,818 km (0.096 R)
• M46: 7,955,764 km (0.072 R)
• M47: 8,039,838 km (0.067 R)
• M48: 8,124,062 km (0.084 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.29 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 944.4

Radius: 13.3

Gravity: 5.34 G

Time & Orbit

Eccentricity (e): 0.022

Orbit Range: 1.26 AU - 1.32 AU

Year: 994 Days

Day: 11.9 Hours

Environment

Temp: -186 °C

Axial Tilt: 27.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (54)

Outer Limit: 60,790,670 km

• M1: 229,932 km (0.079 R)
• M2: 339,587 km (0.027 R)
• M3: 430,243 km (0.103 R)
• M4: 522,097 km (0.054 R)
• M5: 622,626 km (0.083 R)
• M6: 949,049 km (0.029 R)
• M7: 1,055,712 km (0.056 R)
• M8: 1,151,754 km (0.115 R)
• M9: 1,305,690 km (0.059 R)
• M10: 1,626,428 km (0.033 R)
• M11: 1,747,902 km (0.1 R)
• M12: 1,863,690 km (0.072 R)
• M13: 2,056,073 km (0.088 R)
• M14: 2,382,047 km (0.113 R)
• M15: 2,491,104 km (0.107 R)
• M16: 2,601,956 km (0.117 R)
• M17: 2,797,331 km (0.117 R)
• M18: 2,912,820 km (0.087 R)
• M19: 3,008,413 km (0.117 R)
• M20: 3,312,845 km (0.11 R)
• M21: 3,446,436 km (0.094 R)
• M22: 3,593,341 km (0.109 R)
• M23: 3,684,745 km (0.049 R)
• M24: 3,788,416 km (0.12 R)
• M25: 4,237,659 km (0.114 R)
• M26: 4,530,123 km (0.082 R)
• M27: 4,741,355 km (0.068 R)
• M28: 4,842,034 km (0.116 R)
• M29: 4,956,028 km (0.072 R)
• M30: 5,135,097 km (0.095 R)
• M31: 5,342,589 km (0.119 R)
• M32: 5,434,143 km (0.109 R)
• M33: 5,672,302 km (0.098 R)
• M34: 5,900,290 km (0.092 R)
• M35: 6,035,825 km (0.032 R)
• M36: 6,199,934 km (0.089 R)
• M37: 6,351,626 km (0.045 R)
• M38: 6,462,778 km (0.095 R)
• M39: 6,560,615 km (0.092 R)
• M40: 6,928,177 km (0.077 R)
• M41: 7,042,619 km (0.115 R)
• M42: 8,055,995 km (0.109 R)
• M43: 8,267,078 km (0.095 R)
• M44: 8,388,701 km (0.109 R)
• M45: 8,510,772 km (0.12 R)
• M46: 8,618,184 km (0.064 R)
• M47: 8,974,077 km (0.095 R)
• M48: 9,130,407 km (0.099 R)
• M49: 9,604,632 km (0.047 R)
• M50: 9,909,213 km (0.119 R)
• M51: 10,265,855 km (0.069 R)
• M52: 10,380,297 km (0.105 R)
• M53: 10,495,039 km (0.085 R)
• M54: 11,310,497 km (0.115 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.44 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 811.7

Radius: 8.9

Gravity: 10.25 G

Time & Orbit

Eccentricity (e): 0.065

Orbit Range: 1.35 AU - 1.53 AU

Year: 1172 Days

Day: 7.2 Hours

Environment

Temp: -195 °C

Axial Tilt: 19.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 60,790,670 km

• M1: 111,750 km (0.094 R)
• M2: 245,191 km (0.088 R)
• M3: 430,243 km (0.039 R)
• M4: 485,595 km (0.084 R)
• M5: 549,772 km (0.102 R)
• M6: 636,240 km (0.102 R)
• M7: 775,366 km (0.037 R)
• M8: 859,440 km (0.083 R)
• M9: 1,083,986 km (0.088 R)
• M10: 1,244,355 km (0.075 R)
• M11: 1,412,503 km (0.113 R)
• M12: 1,642,435 km (0.033 R)
• M13: 1,715,738 km (0.077 R)
• M14: 1,799,363 km (0.073 R)
• M15: 2,108,432 km (0.057 R)
• M16: 2,259,077 km (0.059 R)
• M17: 2,351,230 km (0.109 R)
• M18: 2,475,994 km (0.09 R)
• M19: 2,581,760 km (0.07 R)
• M20: 2,732,405 km (0.104 R)
• M21: 2,852,831 km (0.066 R)
• M22: 2,919,253 km (0.1 R)
• M23: 3,121,659 km (0.12 R)
• M24: 3,282,327 km (0.081 R)
• M25: 3,363,708 km (0.1 R)
• M26: 3,599,923 km (0.061 R)
• M27: 3,659,762 km (0.114 R)
• M28: 3,792,755 km (0.093 R)
• M29: 3,939,810 km (0.119 R)
• M30: 4,026,427 km (0.075 R)
• M31: 4,088,659 km (0.072 R)
• M32: 4,163,758 km (0.1 R)
• M33: 4,302,734 km (0.074 R)
• M34: 4,559,294 km (0.097 R)
• M35: 4,624,220 km (0.088 R)
• M36: 4,689,594 km (0.108 R)
• M37: 5,524,201 km (0.107 R)
• M38: 5,621,290 km (0.098 R)
• M39: 5,930,209 km (0.104 R)
• M40: 6,638,256 km (0.091 R)
• M41: 7,433,967 km (0.097 R)
• M42: 7,541,229 km (0.089 R)
• M43: 7,944,545 km (0.103 R)
• M44: 8,022,934 km (0.094 R)
• M45: 8,148,895 km (0.112 R)
• M46: 8,370,749 km (0.112 R)
• M47: 8,466,491 km (0.091 R)
• M48: 8,530,519 km (0.097 R)
• M49: 8,626,860 km (0.111 R)
• M50: 9,065,033 km (0.051 R)
• M51: 9,229,141 km (0.107 R)
• M52: 9,593,562 km (0.111 R)
• M53: 9,811,227 km (0.116 R)
• M54: 10,013,483 km (0.092 R)
• M55: 10,456,592 km (0.091 R)
• M56: 10,559,814 km (0.092 R)
• M57: 10,732,450 km (0.109 R)
• M58: 10,836,571 km (0.045 R)
• M59: 11,098,217 km (0.095 R)
• M60: 11,361,958 km (0.054 R)
• M61: 11,485,825 km (0.117 R)
• M62: 11,663,398 km (0.087 R)
• M63: 12,093,492 km (0.056 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 300.6

Radius: 13.6

Gravity: 1.63 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 1.76 AU - 2.42 AU

Year: 2049 Days

Day: 9.6 Hours

Environment

Temp: -197 °C

Axial Tilt: 17.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 60,790,670 km

• M1: 194,477 km (0.079 R)
• M2: 385,813 km (0.109 R)
• M3: 761,453 km (0.072 R)
• M4: 851,810 km (0.097 R)
• M5: 1,037,012 km (0.107 R)
• M6: 1,179,280 km (0.049 R)
• M7: 1,362,687 km (0.088 R)
• M8: 1,449,454 km (0.12 R)
• M9: 1,628,672 km (0.058 R)
• M10: 1,806,245 km (0.099 R)
• M11: 1,892,563 km (0.092 R)
• M12: 1,990,250 km (0.061 R)
• M13: 2,283,611 km (0.108 R)
• M14: 2,462,231 km (0.116 R)
• M15: 2,569,643 km (0.117 R)
• M16: 2,689,471 km (0.051 R)
• M17: 2,800,173 km (0.086 R)
• M18: 2,889,932 km (0.074 R)
• M19: 3,106,849 km (0.097 R)
• M20: 3,460,648 km (0.117 R)
• M21: 3,618,025 km (0.026 R)
• M22: 3,728,428 km (0.074 R)
• M23: 3,889,993 km (0.078 R)
• M24: 4,003,089 km (0.099 R)
• M25: 4,104,666 km (0.081 R)
• M26: 4,388,454 km (0.071 R)
• M27: 4,572,459 km (0.056 R)
• M28: 4,665,509 km (0.097 R)
• M29: 4,799,399 km (0.071 R)
• M30: 4,907,558 km (0.041 R)
• M31: 5,030,079 km (0.074 R)
• M32: 5,126,121 km (0.073 R)
• M33: 5,362,036 km (0.099 R)
• M34: 5,488,447 km (0.118 R)
• M35: 5,801,555 km (0.111 R)
• M36: 5,960,428 km (0.09 R)
• M37: 6,179,290 km (0.063 R)
• M38: 6,445,574 km (0.102 R)
• M39: 6,565,103 km (0.084 R)
• M40: 6,928,177 km (0.107 R)
• M41: 7,173,966 km (0.116 R)
• M42: 7,500,987 km (0.116 R)
• M43: 7,737,501 km (0.105 R)
• M44: 7,912,531 km (0.117 R)
• M45: 8,040,736 km (0.107 R)
• M46: 8,364,167 km (0.073 R)
• M47: 8,807,724 km (0.056 R)
• M48: 9,666,416 km (0.103 R)
• M49: 10,010,491 km (0.078 R)
• M50: 10,271,240 km (0.103 R)
• M51: 10,657,801 km (0.087 R)
• M52: 10,764,016 km (0.111 R)
• M53: 11,210,416 km (0.025 R)
• M54: 11,572,143 km (0.105 R)
• M55: 11,754,353 km (0.093 R)
• M56: 12,066,415 km (0.09 R)
• M57: 12,177,117 km (0.052 R)
• M58: 12,288,268 km (0.038 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 254.5

Radius: 9.9

Gravity: 2.6 G

Time & Orbit

Eccentricity (e): 0.128

Orbit Range: 3.96 AU - 5.12 AU

Year: 6561 Days

Day: 10.9 Hours

Environment

Temp: -218 °C

Axial Tilt: 37.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 60,790,670 km

• M1: 123,867 km (0.113 R)
• M2: 185,651 km (0.108 R)
• M3: 370,255 km (0.096 R)
• M4: 522,845 km (0.109 R)
• M5: 623,374 km (0.079 R)
• M6: 799,152 km (0.106 R)
• M7: 929,751 km (0.101 R)
• M8: 1,054,964 km (0.073 R)
• M9: 1,295,069 km (0.085 R)
• M10: 1,612,515 km (0.047 R)
• M11: 1,703,321 km (0.112 R)
• M12: 1,780,364 km (0.103 R)
• M13: 1,954,197 km (0.114 R)
• M14: 2,084,198 km (0.107 R)
• M15: 2,387,283 km (0.107 R)
• M16: 2,740,783 km (0.07 R)
• M17: 2,868,390 km (0.109 R)
• M18: 3,167,735 km (0.112 R)
• M19: 3,399,013 km (0.114 R)
• M20: 3,816,840 km (0.108 R)
• M21: 3,918,866 km (0.11 R)
• M22: 4,042,284 km (0.071 R)
• M23: 4,549,570 km (0.113 R)
• M24: 5,032,173 km (0.119 R)
• M25: 5,462,117 km (0.102 R)
• M26: 5,531,082 km (0.095 R)
• M27: 5,809,933 km (0.109 R)
• M28: 5,904,030 km (0.104 R)
• M29: 6,309,141 km (0.054 R)
• M30: 6,797,428 km (0.119 R)
• M31: 7,501,436 km (0.085 R)
• M32: 7,680,953 km (0.066 R)
• M33: 8,018,446 km (0.044 R)
• M34: 8,096,985 km (0.112 R)
• M35: 9,086,874 km (0.062 R)
• M36: 9,637,843 km (0.094 R)
• M37: 9,805,243 km (0.045 R)
• M38: 10,570,586 km (0.05 R)
• M39: 11,179,150 km (0.108 R)
• M40: 11,296,285 km (0.101 R)
• M41: 11,502,431 km (0.116 R)
• M42: 11,918,313 km (0.099 R)
• M43: 12,068,060 km (0.118 R)
• M44: 12,158,268 km (0.025 R)
• M45: 12,430,087 km (0.085 R)
• M46: 13,133,795 km (0.092 R)
• M47: 14,102,591 km (0.048 R)
• M48: 14,356,459 km (0.077 R)
• M49: 14,836,369 km (0.09 R)
• M50: 14,900,696 km (0.094 R)
• M51: 15,386,739 km (0.109 R)
• M52: 16,075,638 km (0.115 R)
• M53: 17,415,885 km (0.062 R)
• M54: 17,585,828 km (0.091 R)
• M55: 17,893,252 km (0.076 R)
• M56: 18,582,898 km (0.107 R)
• M57: 18,791,437 km (0.07 R)
• M58: 19,035,880 km (0.053 R)
• M59: 19,421,992 km (0.101 R)
• M60: 19,704,284 km (0.105 R)
• M61: 20,237,600 km (0.101 R)
• M62: 21,136,833 km (0.083 R)
• M63: 21,245,590 km (0.065 R)
• M64: 21,354,498 km (0.092 R)
• M65: 21,755,719 km (0.072 R)
• M66: 22,454,491 km (0.12 R)
• M67: 22,862,444 km (0.093 R)
• M68: 23,197,992 km (0.059 R)
• M69: 23,610,434 km (0.117 R)
• M70: 23,760,929 km (0.102 R)
• M71: 24,138,664 km (0.065 R)
• M72: 25,399,474 km (0.093 R)
• M73: 25,592,456 km (0.085 R)

Planet 7 - Ice Giant

Semi-Major Axis: 7.38 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 755.7

Radius: 7.5

Gravity: 13.43 G

Time & Orbit

Eccentricity (e): 0.012

Orbit Range: 7.29 AU - 7.47 AU

Year: 13598 Days

Day: 23.9 Hours

Environment

Temp: -233 °C

Axial Tilt: 44.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 60,790,670 km

• M1: 163,361 km (0.082 R)
• M2: 216,169 km (0.118 R)
• M3: 277,953 km (0.092 R)
• M4: 333,154 km (0.11 R)
• M5: 457,171 km (0.078 R)
• M6: 1,030,281 km (0.058 R)
• M7: 1,145,920 km (0.103 R)
• M8: 1,492,538 km (0.12 R)
• M9: 1,650,813 km (0.095 R)
• M10: 2,368,284 km (0.113 R)
• M11: 2,711,611 km (0.076 R)
• M12: 2,775,788 km (0.098 R)
• M13: 4,087,612 km (0.109 R)
• M14: 4,805,981 km (0.091 R)
• M15: 5,319,850 km (0.075 R)
• M16: 6,144,284 km (0.108 R)
• M17: 7,319,225 km (0.061 R)
• M18: 7,909,239 km (0.078 R)
• M19: 8,001,392 km (0.097 R)
• M20: 8,608,909 km (0.115 R)
• M21: 8,751,176 km (0.089 R)
• M22: 8,990,084 km (0.103 R)
• M23: 10,066,890 km (0.101 R)
• M24: 10,317,316 km (0.062 R)
• M25: 10,518,974 km (0.063 R)
• M26: 10,620,402 km (0.098 R)
• M27: 10,875,316 km (0.046 R)
• M28: 11,132,176 km (0.11 R)
• M29: 11,183,787 km (0.081 R)
• M30: 11,391,130 km (0.111 R)
• M31: 11,547,460 km (0.096 R)
• M32: 12,286,324 km (0.045 R)
• M33: 13,203,957 km (0.096 R)
• M34: 13,588,124 km (0.081 R)
• M35: 13,643,326 km (0.118 R)
• M36: 14,143,431 km (0.072 R)
• M37: 14,536,575 km (0.069 R)
• M38: 16,910,394 km (0.072 R)
• M39: 18,476,983 km (0.085 R)
• M40: 18,783,658 km (0.103 R)
• M41: 18,906,777 km (0.029 R)
• M42: 20,215,310 km (0.081 R)
• M43: 20,278,440 km (0.047 R)
• M44: 21,424,360 km (0.087 R)
• M45: 21,553,014 km (0.025 R)
• M46: 21,746,444 km (0.077 R)
• M47: 21,811,070 km (0.086 R)
• M48: 22,070,174 km (0.109 R)
• M49: 22,265,100 km (0.1 R)
• M50: 22,330,175 km (0.046 R)
• M51: 22,722,271 km (0.084 R)
• M52: 23,712,310 km (0.098 R)
• M53: 24,380,115 km (0.114 R)
• M54: 24,581,623 km (0.072 R)
• M55: 27,460,784 km (0.102 R)
• M56: 29,438,767 km (0.116 R)
• M57: 31,097,508 km (0.04 R)
• M58: 31,389,074 km (0.05 R)
• M59: 31,975,049 km (0.106 R)
• M60: 32,564,464 km (0.067 R)
• M61: 34,580,296 km (0.119 R)
• M62: 35,641,393 km (0.098 R)
• M63: 35,870,129 km (0.119 R)
• M64: 37,330,353 km (0.04 R)
• M65: 38,653,247 km (0.101 R)
• M66: 38,888,266 km (0.077 R)
• M67: 39,675,150 km (0.115 R)
• M68: 39,991,400 km (0.091 R)
• M69: 43,199,527 km (0.058 R)
• M70: 43,361,990 km (0.034 R)
• M71: 43,524,752 km (0.089 R)
• M72: 44,423,686 km (0.032 R)
• M73: 44,916,461 km (0.059 R)
• M74: 45,163,597 km (0.039 R)
• M75: 45,328,604 km (0.079 R)
• M76: 46,739,162 km (0.101 R)
• M77: 46,822,488 km (0.076 R)
• M78: 47,324,090 km (0.073 R)
• M79: 47,911,560 km (0.115 R)
• M80: 48,079,858 km (0.113 R)
• M81: 50,456,220 km (0.119 R)
• M82: 52,523,364 km (0.069 R)
• M83: 52,957,497 km (0.101 R)
• M84: 54,179,412 km (0.116 R)
• M85: 54,442,555 km (0.102 R)
• M86: 55,322,489 km (0.106 R)
• M87: 55,587,278 km (0.064 R)
• M88: 57,007,111 km (0.11 R)
• M89: 58,079,877 km (0.032 R)
• M90: 58,259,245 km (0.071 R)
• M91: 59,069,018 km (0.07 R)
• M92: 60,154,501 km (0.096 R)
• M93: 60,245,157 km (0.098 R)

Kuiper Belt

Range: 30 - 46 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 446 - 11,956 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit