🌌 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: 598.3

Radius: 10.1

Gravity: 5.87 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 0.53 AU - 0.67 AU

Year: 321 Days

Day: 11.1 Hours

Environment

Temp: -145 °C

Axial Tilt: 37.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (39)

Outer Limit: 25,087,112 km

• M1: 156,330 km (0.108 R)
• M2: 239,057 km (0.071 R)
• M3: 303,384 km (0.063 R)
• M4: 376,687 km (0.107 R)
• M5: 449,392 km (0.103 R)
• M6: 513,121 km (0.09 R)
• M7: 577,448 km (0.069 R)
• M8: 641,625 km (0.106 R)
• M9: 746,493 km (0.109 R)
• M10: 828,473 km (0.115 R)
• M11: 940,223 km (0.084 R)
• M12: 1,025,643 km (0.041 R)
• M13: 1,183,918 km (0.109 R)
• M14: 1,294,171 km (0.055 R)
• M15: 1,407,866 km (0.115 R)
• M16: 1,493,136 km (0.045 R)
• M17: 1,561,802 km (0.098 R)
• M18: 1,783,955 km (0.039 R)
• M19: 1,886,728 km (0.047 R)
• M20: 2,001,470 km (0.072 R)
• M21: 2,077,615 km (0.087 R)
• M22: 2,201,482 km (0.053 R)
• M23: 2,290,792 km (0.077 R)
• M24: 2,473,152 km (0.119 R)
• M25: 2,654,764 km (0.109 R)
• M26: 2,744,373 km (0.114 R)
• M27: 2,817,975 km (0.108 R)
• M28: 3,025,318 km (0.101 R)
• M29: 3,124,950 km (0.026 R)
• M30: 3,207,977 km (0.088 R)
• M31: 3,382,109 km (0.088 R)
• M32: 3,783,929 km (0.097 R)
• M33: 3,942,502 km (0.107 R)
• M34: 4,019,396 km (0.102 R)
• M35: 4,090,455 km (0.098 R)
• M36: 4,181,260 km (0.072 R)
• M37: 4,378,580 km (0.048 R)
• M38: 4,451,584 km (0.106 R)
• M39: 4,572,010 km (0.103 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 276.5

Radius: 14.9

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.009

Orbit Range: 1.51 AU - 1.53 AU

Year: 1294 Days

Day: 13 Hours

Environment

Temp: -185 °C

Axial Tilt: 32.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (44)

Outer Limit: 25,087,112 km

• M1: 185,651 km (0.115 R)
• M2: 281,543 km (0.098 R)
• M3: 382,372 km (0.109 R)
• M4: 478,713 km (0.085 R)
• M5: 706,102 km (0.083 R)
• M6: 846,275 km (0.082 R)
• M7: 949,498 km (0.116 R)
• M8: 1,209,349 km (0.06 R)
• M9: 1,334,862 km (0.042 R)
• M10: 1,451,249 km (0.105 R)
• M11: 1,585,737 km (0.069 R)
• M12: 1,860,100 km (0.039 R)
• M13: 1,968,110 km (0.115 R)
• M14: 2,078,363 km (0.086 R)
• M15: 2,256,085 km (0.067 R)
• M16: 2,355,269 km (0.115 R)
• M17: 2,532,393 km (0.112 R)
• M18: 3,063,316 km (0.045 R)
• M19: 3,285,618 km (0.073 R)
• M20: 3,436,861 km (0.108 R)
• M21: 4,055,000 km (0.055 R)
• M22: 4,197,267 km (0.098 R)
• M23: 4,330,709 km (0.114 R)
• M24: 4,549,570 km (0.096 R)
• M25: 4,676,280 km (0.031 R)
• M26: 4,772,022 km (0.107 R)
• M27: 5,052,668 km (0.118 R)
• M28: 5,162,024 km (0.116 R)
• M29: 5,283,198 km (0.062 R)
• M30: 5,427,860 km (0.057 R)
• M31: 5,528,689 km (0.088 R)
• M32: 5,732,291 km (0.031 R)
• M33: 6,065,595 km (0.071 R)
• M34: 6,158,645 km (0.102 R)
• M35: 6,334,572 km (0.088 R)
• M36: 6,476,391 km (0.049 R)
• M37: 6,583,503 km (0.101 R)
• M38: 7,115,922 km (0.082 R)
• M39: 7,288,259 km (0.089 R)
• M40: 7,725,234 km (0.049 R)
• M41: 7,864,360 km (0.082 R)
• M42: 8,145,155 km (0.051 R)
• M43: 8,914,537 km (0.071 R)
• M44: 9,033,916 km (0.092 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 624.2

Radius: 8.1

Gravity: 9.51 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 1.61 AU - 2.21 AU

Year: 1822 Days

Day: 10.3 Hours

Environment

Temp: -198 °C

Axial Tilt: 35.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (64)

Outer Limit: 25,087,112 km

• M1: 102,026 km (0.088 R)
• M2: 152,440 km (0.072 R)
• M3: 228,436 km (0.057 R)
• M4: 357,988 km (0.102 R)
• M5: 468,391 km (0.057 R)
• M6: 562,787 km (0.082 R)
• M7: 627,264 km (0.094 R)
• M8: 997,219 km (0.084 R)
• M9: 1,104,032 km (0.081 R)
• M10: 1,281,156 km (0.059 R)
• M11: 1,427,612 km (0.107 R)
• M12: 1,844,991 km (0.115 R)
• M13: 1,977,385 km (0.098 R)
• M14: 2,124,439 km (0.075 R)
• M15: 2,193,554 km (0.107 R)
• M16: 2,310,390 km (0.114 R)
• M17: 2,369,630 km (0.069 R)
• M18: 2,477,640 km (0.064 R)
• M19: 2,587,295 km (0.098 R)
• M20: 2,836,675 km (0.03 R)
• M21: 3,080,819 km (0.059 R)
• M22: 3,278,437 km (0.087 R)
• M23: 3,399,013 km (0.118 R)
• M24: 3,480,095 km (0.057 R)
• M25: 3,686,092 km (0.116 R)
• M26: 4,038,095 km (0.118 R)
• M27: 4,109,753 km (0.101 R)
• M28: 4,312,907 km (0.064 R)
• M29: 4,623,771 km (0.079 R)
• M30: 4,835,003 km (0.102 R)
• M31: 5,018,709 km (0.101 R)
• M32: 5,142,427 km (0.062 R)
• M33: 5,267,191 km (0.071 R)
• M34: 6,102,247 km (0.106 R)
• M35: 6,217,886 km (0.111 R)
• M36: 6,670,419 km (0.057 R)
• M37: 6,721,283 km (0.092 R)
• M38: 6,789,499 km (0.072 R)
• M39: 7,081,664 km (0.099 R)
• M40: 7,133,574 km (0.074 R)
• M41: 7,413,023 km (0.04 R)
• M42: 7,678,260 km (0.086 R)
• M43: 7,767,421 km (0.104 R)
• M44: 7,928,687 km (0.084 R)
• M45: 8,826,125 km (0.103 R)
• M46: 9,334,309 km (0.088 R)
• M47: 9,525,046 km (0.047 R)
• M48: 9,639,937 km (0.114 R)
• M49: 10,457,938 km (0.11 R)
• M50: 10,556,823 km (0.1 R)
• M51: 11,176,607 km (0.099 R)
• M52: 11,419,703 km (0.08 R)
• M53: 11,644,100 km (0.078 R)
• M54: 11,911,282 km (0.066 R)
• M55: 12,076,587 km (0.056 R)
• M56: 12,305,322 km (0.071 R)
• M57: 12,409,742 km (0.039 R)
• M58: 12,724,645 km (0.116 R)
• M59: 12,978,513 km (0.095 R)
• M60: 13,685,363 km (0.036 R)
• M61: 13,945,514 km (0.111 R)
• M62: 14,470,602 km (0.093 R)
• M63: 14,757,830 km (0.045 R)
• M64: 14,824,401 km (0.094 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 675.4

Radius: 12

Gravity: 4.69 G

Time & Orbit

Eccentricity (e): 0.089

Orbit Range: 2.81 AU - 3.35 AU

Year: 3731 Days

Day: 14.1 Hours

Environment

Temp: -206 °C

Axial Tilt: 2.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 25,087,112 km

• M1: 155,432 km (0.044 R)
• M2: 423,960 km (0.117 R)
• M3: 664,215 km (0.112 R)
• M4: 880,234 km (0.104 R)
• M5: 1,009,486 km (0.119 R)
• M6: 1,649,017 km (0.11 R)
• M7: 1,856,659 km (0.118 R)
• M8: 1,994,888 km (0.101 R)
• M9: 2,088,985 km (0.066 R)
• M10: 2,347,490 km (0.087 R)
• M11: 2,463,877 km (0.106 R)
• M12: 2,616,467 km (0.028 R)
• M13: 2,719,988 km (0.066 R)
• M14: 2,860,162 km (0.042 R)
• M15: 3,093,235 km (0.092 R)
• M16: 3,295,342 km (0.073 R)
• M17: 3,407,391 km (0.072 R)
• M18: 4,187,544 km (0.064 R)
• M19: 4,268,626 km (0.101 R)
• M20: 5,238,169 km (0.058 R)
• M21: 5,591,071 km (0.06 R)
• M22: 6,066,044 km (0.092 R)
• M23: 6,204,123 km (0.098 R)
• M24: 6,672,215 km (0.072 R)
• M25: 6,862,653 km (0.083 R)
• M26: 7,079,121 km (0.067 R)
• M27: 7,175,911 km (0.12 R)
• M28: 7,692,173 km (0.113 R)
• M29: 8,093,394 km (0.057 R)
• M30: 8,322,279 km (0.075 R)
• M31: 8,553,109 km (0.1 R)
• M32: 8,708,242 km (0.094 R)
• M33: 8,968,991 km (0.093 R)
• M34: 9,285,241 km (0.112 R)
• M35: 9,364,827 km (0.098 R)
• M36: 9,605,081 km (0.067 R)
• M37: 9,955,888 km (0.069 R)
• M38: 10,064,646 km (0.081 R)
• M39: 10,892,969 km (0.1 R)
• M40: 11,089,391 km (0.105 R)
• M41: 11,258,736 km (0.1 R)
• M42: 11,371,981 km (0.037 R)
• M43: 11,514,249 km (0.097 R)
• M44: 11,886,897 km (0.062 R)
• M45: 12,002,387 km (0.115 R)
• M46: 12,467,935 km (0.083 R)
• M47: 13,326,777 km (0.091 R)
• M48: 13,476,823 km (0.112 R)
• M49: 13,597,250 km (0.075 R)
• M50: 13,808,931 km (0.068 R)
• M51: 14,143,581 km (0.086 R)
• M52: 14,604,492 km (0.055 R)
• M53: 14,790,143 km (0.062 R)
• M54: 15,007,808 km (0.053 R)
• M55: 15,572,390 km (0.109 R)
• M56: 15,698,950 km (0.11 R)
• M57: 15,857,374 km (0.052 R)
• M58: 16,787,275 km (0.11 R)
• M59: 17,046,827 km (0.096 R)
• M60: 17,635,943 km (0.116 R)
• M61: 17,833,712 km (0.118 R)
• M62: 18,032,378 km (0.108 R)
• M63: 18,331,573 km (0.088 R)
• M64: 19,103,798 km (0.053 R)
• M65: 19,374,869 km (0.098 R)
• M66: 20,092,640 km (0.105 R)
• M67: 20,368,348 km (0.09 R)
• M68: 20,610,547 km (0.056 R)
• M69: 21,624,522 km (0.117 R)
• M70: 21,765,593 km (0.108 R)
• M71: 22,941,581 km (0.066 R)
• M72: 23,664,438 km (0.1 R)
• M73: 23,773,495 km (0.079 R)
• M74: 24,578,332 km (0.095 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.23 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 276.3

Radius: 13.4

Gravity: 1.54 G

Time & Orbit

Eccentricity (e): 0.224

Orbit Range: 3.28 AU - 5.18 AU

Year: 6005 Days

Day: 9 Hours

Environment

Temp: -221 °C

Axial Tilt: 1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 25,087,112 km

• M1: 212,579 km (0.115 R)
• M2: 413,638 km (0.108 R)
• M3: 534,663 km (0.088 R)
• M4: 680,970 km (0.103 R)
• M5: 787,184 km (0.088 R)
• M6: 888,312 km (0.086 R)
• M7: 1,055,413 km (0.103 R)
• M8: 1,143,227 km (0.044 R)
• M9: 1,577,958 km (0.085 R)
• M10: 1,769,294 km (0.087 R)
• M11: 2,628,285 km (0.049 R)
• M12: 3,429,232 km (0.09 R)
• M13: 4,488,834 km (0.028 R)
• M14: 4,849,215 km (0.106 R)
• M15: 5,711,497 km (0.115 R)
• M16: 5,848,379 km (0.028 R)
• M17: 6,055,722 km (0.108 R)
• M18: 6,195,446 km (0.102 R)
• M19: 6,383,341 km (0.056 R)
• M20: 6,620,903 km (0.086 R)
• M21: 7,007,164 km (0.108 R)
• M22: 7,400,756 km (0.074 R)
• M23: 8,312,854 km (0.065 R)
• M24: 9,448,602 km (0.118 R)
• M25: 9,828,879 km (0.095 R)
• M26: 10,076,015 km (0.103 R)
• M27: 10,186,568 km (0.076 R)
• M28: 10,408,870 km (0.076 R)
• M29: 10,492,495 km (0.086 R)
• M30: 10,660,793 km (0.077 R)
• M31: 10,773,440 km (0.076 R)
• M32: 11,486,424 km (0.109 R)
• M33: 11,892,432 km (0.089 R)
• M34: 12,097,082 km (0.1 R)
• M35: 12,421,261 km (0.05 R)
• M36: 12,838,040 km (0.088 R)
• M37: 12,927,949 km (0.101 R)
• M38: 13,048,225 km (0.061 R)
• M39: 13,229,089 km (0.113 R)
• M40: 14,023,155 km (0.03 R)
• M41: 14,146,723 km (0.094 R)
• M42: 14,581,903 km (0.087 R)
• M43: 15,021,571 km (0.118 R)
• M44: 15,147,981 km (0.084 R)
• M45: 15,625,348 km (0.116 R)
• M46: 16,301,830 km (0.118 R)
• M47: 16,399,218 km (0.108 R)
• M48: 16,659,967 km (0.079 R)
• M49: 16,889,300 km (0.12 R)
• M50: 17,450,442 km (0.107 R)
• M51: 17,984,357 km (0.103 R)
• M52: 18,118,696 km (0.116 R)
• M53: 18,286,993 km (0.03 R)
• M54: 18,693,152 km (0.093 R)
• M55: 18,829,286 km (0.058 R)
• M56: 19,687,080 km (0.08 R)
• M57: 20,033,848 km (0.072 R)
• M58: 20,487,578 km (0.119 R)
• M59: 20,733,367 km (0.111 R)
• M60: 20,838,983 km (0.045 R)
• M61: 21,156,879 km (0.085 R)
• M62: 22,264,352 km (0.067 R)
• M63: 22,625,481 km (0.095 R)
• M64: 23,134,563 km (0.106 R)
• M65: 24,163,946 km (0.112 R)
• M66: 24,721,647 km (0.082 R)
• M67: 24,983,293 km (0.106 R)
• M68: 25,095,791 km (0.051 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 635.6

Radius: 12.8

Gravity: 3.88 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 3.97 AU - 6.03 AU

Year: 7717 Days

Day: 9.6 Hours

Environment

Temp: -232 °C

Axial Tilt: 20.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 25,087,112 km

• M1: 160,369 km (0.102 R)
• M2: 763,996 km (0.034 R)
• M3: 915,988 km (0.043 R)
• M4: 996,172 km (0.115 R)
• M5: 1,112,859 km (0.112 R)
• M6: 1,216,979 km (0.089 R)
• M7: 1,492,089 km (0.092 R)
• M8: 1,974,243 km (0.083 R)
• M9: 2,145,682 km (0.093 R)
• M10: 2,255,487 km (0.116 R)
• M11: 2,480,781 km (0.11 R)
• M12: 2,784,914 km (0.046 R)
• M13: 2,978,045 km (0.074 R)
• M14: 3,175,813 km (0.108 R)
• M15: 4,340,283 km (0.1 R)
• M16: 4,424,207 km (0.078 R)
• M17: 4,679,122 km (0.109 R)
• M18: 5,233,532 km (0.094 R)
• M19: 5,533,625 km (0.082 R)
• M20: 5,777,919 km (0.095 R)
• M21: 6,182,581 km (0.103 R)
• M22: 6,308,841 km (0.118 R)
• M23: 6,660,845 km (0.083 R)
• M24: 6,986,370 km (0.105 R)
• M25: 7,085,105 km (0.086 R)
• M26: 7,789,112 km (0.098 R)
• M27: 7,925,845 km (0.103 R)
• M28: 8,166,847 km (0.063 R)
• M29: 8,480,404 km (0.108 R)
• M30: 8,656,331 km (0.074 R)
• M31: 8,798,000 km (0.117 R)
• M32: 8,976,171 km (0.107 R)
• M33: 9,663,873 km (0.074 R)
• M34: 10,519,124 km (0.049 R)
• M35: 10,975,098 km (0.108 R)
• M36: 11,128,436 km (0.07 R)
• M37: 11,282,671 km (0.086 R)
• M38: 12,301,732 km (0.083 R)
• M39: 12,461,203 km (0.102 R)
• M40: 12,984,048 km (0.116 R)
• M41: 13,596,352 km (0.094 R)
• M42: 14,218,081 km (0.115 R)
• M43: 14,427,368 km (0.081 R)
• M44: 14,722,226 km (0.06 R)
• M45: 15,532,298 km (0.108 R)
• M46: 16,356,882 km (0.083 R)
• M47: 16,488,378 km (0.077 R)
• M48: 17,687,854 km (0.093 R)
• M49: 18,229,847 km (0.068 R)
• M50: 19,284,213 km (0.057 R)
• M51: 19,423,189 km (0.114 R)
• M52: 20,641,664 km (0.088 R)
• M53: 20,831,204 km (0.08 R)
• M54: 20,926,349 km (0.092 R)
• M55: 21,069,065 km (0.087 R)
• M56: 21,403,715 km (0.109 R)
• M57: 22,808,439 km (0.078 R)
• M58: 23,102,698 km (0.06 R)
• M59: 23,349,086 km (0.051 R)
• M60: 24,043,220 km (0.093 R)
• M61: 25,350,406 km (0.113 R)
• M62: 26,629,019 km (0.085 R)
• M63: 27,354,120 km (0.106 R)
• M64: 27,510,450 km (0.12 R)
• M65: 27,876,067 km (0.11 R)
• M66: 28,454,113 km (0.106 R)
• M67: 29,142,264 km (0.101 R)
• M68: 29,675,281 km (0.109 R)
• M69: 30,643,029 km (0.117 R)
• M70: 31,402,837 km (0.103 R)
• M71: 32,278,733 km (0.07 R)
• M72: 32,719,747 km (0.079 R)
• M73: 34,954,590 km (0.077 R)
• M74: 35,237,479 km (0.097 R)
• M75: 35,634,662 km (0.104 R)
• M76: 35,805,353 km (0.097 R)
• M77: 36,033,340 km (0.08 R)
• M78: 36,147,483 km (0.097 R)
• M79: 36,662,848 km (0.054 R)
• M80: 37,238,351 km (0.1 R)
• M81: 38,165,259 km (0.11 R)

Planet 7 - Ice Giant

Semi-Major Axis: 5.7 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 111.3

Radius: 4.6

Gravity: 5.26 G

Time & Orbit

Eccentricity (e): 0.131

Orbit Range: 4.95 AU - 6.45 AU

Year: 9393 Days

Day: 21.4 Hours

Environment

Temp: -223 °C

Axial Tilt: 27.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (52)

Outer Limit: 25,087,112 km

• M1: 61,335 km (0.092 R)
• M2: 187,297 km (0.107 R)
• M3: 530,773 km (0.059 R)
• M4: 623,524 km (0.116 R)
• M5: 848,669 km (0.045 R)
• M6: 1,071,719 km (0.034 R)
• M7: 1,136,944 km (0.077 R)
• M8: 1,368,372 km (0.072 R)
• M9: 1,749,996 km (0.098 R)
• M10: 2,016,729 km (0.032 R)
• M11: 3,092,487 km (0.11 R)
• M12: 3,129,737 km (0.115 R)
• M13: 3,242,384 km (0.058 R)
• M14: 3,413,823 km (0.095 R)
• M15: 3,452,420 km (0.082 R)
• M16: 3,765,678 km (0.111 R)
• M17: 3,805,471 km (0.069 R)
• M18: 3,845,413 km (0.076 R)
• M19: 3,905,552 km (0.076 R)
• M20: 4,314,851 km (0.074 R)
• M21: 4,377,383 km (0.049 R)
• M22: 4,932,092 km (0.094 R)
• M23: 5,129,262 km (0.089 R)
• M24: 5,329,125 km (0.034 R)
• M25: 5,966,711 km (0.109 R)
• M26: 6,341,903 km (0.112 R)
• M27: 6,580,212 km (0.12 R)
• M28: 6,894,517 km (0.086 R)
• M29: 7,312,793 km (0.104 R)
• M30: 7,587,754 km (0.078 R)
• M31: 7,942,749 km (0.115 R)
• M32: 8,380,922 km (0.041 R)
• M33: 8,827,022 km (0.035 R)
• M34: 9,879,294 km (0.094 R)
• M35: 10,828,642 km (0.09 R)
• M36: 11,631,982 km (0.072 R)
• M37: 12,306,070 km (0.063 R)
• M38: 13,234,624 km (0.12 R)
• M39: 13,264,993 km (0.055 R)
• M40: 17,035,158 km (0.085 R)
• M41: 17,101,131 km (0.066 R)
• M42: 17,200,314 km (0.03 R)
• M43: 18,270,238 km (0.111 R)
• M44: 18,574,969 km (0.12 R)
• M45: 18,881,495 km (0.104 R)
• M46: 19,741,384 km (0.035 R)
• M47: 20,543,827 km (0.066 R)
• M48: 20,931,435 km (0.112 R)
• M49: 21,250,228 km (0.107 R)
• M50: 21,856,997 km (0.074 R)
• M51: 22,216,481 km (0.052 R)
• M52: 22,252,534 km (0.08 R)

Kuiper Belt

Range: 30 - 49 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 251 - 18,551 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit