🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.92 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.38

Radius: 1.14

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 0.86 AU - 0.98 AU

Year: 385 Days

Day: 42.2 Hours

Environment

Temp: -45 °C

Axial Tilt: 59.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 61,507,261 km

• M1: 438,920 km (0.119 R)
• M2: 564,433 km (0.1 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.04 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.35

Radius: 1.41

Gravity: 1.18 G

Time & Orbit

Eccentricity (e): 0.126

Orbit Range: 0.91 AU - 1.17 AU

Year: 463 Days

Day: 34.2 Hours

Environment

Temp: -65 °C

Axial Tilt: 1.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 61,507,261 km

• M1: 608,863 km (0.063 R)
• M2: 717,771 km (0.12 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.51 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.25

Radius: 0.57

Gravity: 0.77 G

Time & Orbit

Eccentricity (e): 0.242

Orbit Range: 1.14 AU - 1.88 AU

Year: 810 Days

Day: 44.4 Hours

Environment

Temp: -90 °C

Axial Tilt: 14.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 61,507,261 km

• M1: 431,889 km (0.044 R)

Planet 4 - Terrestrial

Semi-Major Axis: 1.94 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.88

Radius: 1.29

Gravity: 1.13 G

Time & Orbit

Eccentricity (e): 0.213

Orbit Range: 1.53 AU - 2.35 AU

Year: 1180 Days

Day: 28.8 Hours

Environment

Temp: -112 °C

Axial Tilt: 37.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 61,507,261 km

• M1: 217,515 km (0.069 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.87 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 511.5

Radius: 10.3

Gravity: 4.82 G

Time & Orbit

Eccentricity (e): 0.174

Orbit Range: 2.37 AU - 3.37 AU

Year: 2123 Days

Day: 8.2 Hours

Environment

Temp: -134 °C

Axial Tilt: 31.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 61,507,261 km

• M1: 143,464 km (0.091 R)
• M2: 382,372 km (0.109 R)
• M3: 642,822 km (0.053 R)
• M4: 750,084 km (0.057 R)
• M5: 897,737 km (0.067 R)
• M6: 1,073,664 km (0.112 R)
• M7: 1,241,962 km (0.093 R)
• M8: 1,679,386 km (0.097 R)
• M9: 1,989,053 km (0.115 R)
• M10: 2,069,387 km (0.118 R)
• M11: 2,150,769 km (0.119 R)
• M12: 2,233,347 km (0.112 R)
• M13: 2,353,175 km (0.095 R)
• M14: 2,499,930 km (0.047 R)
• M15: 2,611,979 km (0.106 R)
• M16: 3,050,450 km (0.084 R)
• M17: 3,360,267 km (0.108 R)
• M18: 3,865,609 km (0.117 R)
• M19: 3,966,737 km (0.086 R)
• M20: 4,142,066 km (0.064 R)
• M21: 4,455,025 km (0.06 R)
• M22: 4,729,686 km (0.047 R)
• M23: 4,931,344 km (0.041 R)
• M24: 5,151,851 km (0.071 R)
• M25: 5,766,549 km (0.08 R)
• M26: 6,065,894 km (0.101 R)
• M27: 6,200,533 km (0.071 R)
• M28: 6,455,896 km (0.083 R)
• M29: 6,627,934 km (0.067 R)
• M30: 6,697,197 km (0.118 R)
• M31: 7,242,332 km (0.114 R)
• M32: 7,583,415 km (0.092 R)
• M33: 7,783,428 km (0.091 R)
• M34: 8,412,337 km (0.109 R)
• M35: 8,790,072 km (0.114 R)
• M36: 8,961,810 km (0.095 R)
• M37: 9,038,554 km (0.053 R)
• M38: 9,134,745 km (0.111 R)
• M39: 9,347,473 km (0.093 R)
• M40: 9,738,672 km (0.095 R)
• M41: 10,215,141 km (0.093 R)
• M42: 10,456,293 km (0.105 R)
• M43: 10,597,812 km (0.07 R)
• M44: 11,067,400 km (0.064 R)
• M45: 11,418,805 km (0.064 R)
• M46: 11,627,195 km (0.108 R)
• M47: 12,026,771 km (0.057 R)
• M48: 12,602,274 km (0.112 R)
• M49: 12,731,377 km (0.051 R)
• M50: 12,969,238 km (0.11 R)
• M51: 13,427,456 km (0.111 R)
• M52: 13,757,918 km (0.05 R)
• M53: 14,225,262 km (0.037 R)
• M54: 14,494,687 km (0.101 R)
• M55: 14,607,334 km (0.08 R)
• M56: 15,015,587 km (0.072 R)
• M57: 15,152,619 km (0.103 R)
• M58: 15,473,656 km (0.115 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.57 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 532.2

Radius: 10.6

Gravity: 4.74 G

Time & Orbit

Eccentricity (e): 0.162

Orbit Range: 4.67 AU - 6.47 AU

Year: 5739 Days

Day: 6.6 Hours

Environment

Temp: -186 °C

Axial Tilt: 28.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 61,507,261 km

• M1: 145,858 km (0.101 R)
• M2: 305,329 km (0.066 R)
• M3: 374,144 km (0.112 R)
• M4: 450,439 km (0.101 R)
• M5: 533,316 km (0.068 R)
• M6: 680,970 km (0.026 R)
• M7: 1,192,295 km (0.057 R)
• M8: 1,267,543 km (0.085 R)
• M9: 1,359,994 km (0.058 R)
• M10: 1,535,622 km (0.081 R)
• M11: 2,125,786 km (0.066 R)
• M12: 2,426,477 km (0.081 R)
• M13: 2,523,267 km (0.102 R)
• M14: 2,641,150 km (0.11 R)
• M15: 3,279,634 km (0.084 R)
• M16: 3,649,739 km (0.047 R)
• M17: 3,851,248 km (0.116 R)
• M18: 4,033,308 km (0.112 R)
• M19: 4,171,836 km (0.083 R)
• M20: 4,265,035 km (0.043 R)
• M21: 4,645,014 km (0.1 R)
• M22: 5,616,502 km (0.063 R)
• M23: 6,112,120 km (0.116 R)
• M24: 6,513,491 km (0.065 R)
• M25: 6,649,177 km (0.076 R)
• M26: 6,840,662 km (0.038 R)
• M27: 7,285,416 km (0.114 R)
• M28: 8,028,020 km (0.113 R)
• M29: 8,232,072 km (0.101 R)
• M30: 8,704,950 km (0.118 R)
• M31: 8,794,709 km (0.102 R)
• M32: 8,914,687 km (0.117 R)
• M33: 9,894,553 km (0.065 R)
• M34: 10,144,830 km (0.071 R)
• M35: 10,270,791 km (0.084 R)
• M36: 10,651,817 km (0.079 R)
• M37: 10,908,378 km (0.113 R)
• M38: 11,427,632 km (0.073 R)
• M39: 12,423,056 km (0.09 R)
• M40: 12,794,956 km (0.102 R)
• M41: 13,136,339 km (0.096 R)
• M42: 13,377,042 km (0.056 R)
• M43: 14,107,977 km (0.111 R)
• M44: 14,389,819 km (0.091 R)
• M45: 14,638,002 km (0.12 R)
• M46: 15,572,091 km (0.055 R)
• M47: 15,973,163 km (0.065 R)
• M48: 16,046,466 km (0.089 R)
• M49: 16,119,919 km (0.113 R)
• M50: 16,414,626 km (0.087 R)
• M51: 17,460,016 km (0.111 R)
• M52: 17,686,956 km (0.108 R)
• M53: 17,838,648 km (0.107 R)
• M54: 18,143,529 km (0.085 R)
• M55: 19,107,238 km (0.063 R)
• M56: 19,341,060 km (0.078 R)
• M57: 20,166,840 km (0.067 R)
• M58: 20,763,586 km (0.113 R)
• M59: 21,568,423 km (0.12 R)
• M60: 22,794,826 km (0.071 R)
• M61: 23,042,710 km (0.088 R)
• M62: 23,208,614 km (0.104 R)
• M63: 23,374,817 km (0.06 R)
• M64: 24,169,780 km (0.063 R)
• M65: 24,422,600 km (0.082 R)
• M66: 25,400,073 km (0.078 R)
• M67: 25,614,297 km (0.09 R)
• M68: 26,303,794 km (0.03 R)
• M69: 26,520,561 km (0.059 R)
• M70: 26,781,310 km (0.118 R)
• M71: 26,912,059 km (0.083 R)
• M72: 27,217,986 km (0.116 R)
• M73: 27,305,651 km (0.088 R)
• M74: 27,437,147 km (0.091 R)
• M75: 27,701,038 km (0.113 R)
• M76: 28,497,497 km (0.103 R)
• M77: 28,586,508 km (0.067 R)
• M78: 28,764,679 km (0.056 R)
• M79: 30,113,004 km (0.091 R)

Planet 7 - Gas Giant

Semi-Major Axis: 7.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 372.5

Radius: 10.4

Gravity: 3.44 G

Time & Orbit

Eccentricity (e): 0.094

Orbit Range: 6.99 AU - 8.45 AU

Year: 9364 Days

Day: 14.1 Hours

Environment

Temp: -191 °C

Axial Tilt: 0.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 61,507,261 km

• M1: 146,606 km (0.106 R)
• M2: 234,869 km (0.032 R)
• M3: 333,005 km (0.1 R)
• M4: 623,823 km (0.089 R)
• M5: 942,317 km (0.041 R)
• M6: 1,021,753 km (0.069 R)
• M7: 1,103,583 km (0.112 R)
• M8: 1,327,232 km (0.1 R)
• M9: 1,980,377 km (0.114 R)
• M10: 2,211,206 km (0.048 R)
• M11: 2,585,201 km (0.078 R)
• M12: 2,768,159 km (0.083 R)
• M13: 2,955,456 km (0.043 R)
• M14: 3,567,760 km (0.062 R)
• M15: 4,059,189 km (0.095 R)
• M16: 4,380,674 km (0.098 R)
• M17: 4,517,108 km (0.108 R)
• M18: 4,682,563 km (0.04 R)
• M19: 5,048,330 km (0.111 R)
• M20: 5,423,222 km (0.114 R)
• M21: 6,353,571 km (0.114 R)
• M22: 6,477,139 km (0.036 R)
• M23: 6,601,604 km (0.084 R)
• M24: 6,758,383 km (0.115 R)
• M25: 7,397,615 km (0.118 R)
• M26: 7,560,377 km (0.108 R)
• M27: 7,889,642 km (0.04 R)
• M28: 8,257,354 km (0.071 R)
• M29: 8,630,600 km (0.043 R)
• M30: 8,905,561 km (0.056 R)
• M31: 9,044,089 km (0.116 R)
• M32: 9,605,679 km (0.06 R)
• M33: 9,676,589 km (0.077 R)
• M34: 9,998,224 km (0.05 R)
• M35: 10,542,012 km (0.106 R)
• M36: 10,799,171 km (0.066 R)
• M37: 11,924,297 km (0.074 R)
• M38: 12,000,741 km (0.091 R)
• M39: 12,617,234 km (0.109 R)
• M40: 12,734,070 km (0.116 R)
• M41: 12,812,160 km (0.056 R)
• M42: 12,929,445 km (0.11 R)
• M43: 13,086,523 km (0.055 R)
• M44: 14,082,545 km (0.086 R)
• M45: 14,691,708 km (0.116 R)
• M46: 14,855,667 km (0.082 R)
• M47: 15,020,225 km (0.098 R)
• M48: 15,559,076 km (0.116 R)
• M49: 15,642,552 km (0.042 R)
• M50: 16,358,228 km (0.079 R)
• M51: 16,912,638 km (0.027 R)
• M52: 17,908,660 km (0.102 R)
• M53: 18,745,810 km (0.081 R)
• M54: 19,460,589 km (0.113 R)
• M55: 20,824,921 km (0.115 R)
• M56: 21,472,082 km (0.073 R)
• M57: 21,564,982 km (0.108 R)
• M58: 21,938,378 km (0.116 R)
• M59: 22,079,000 km (0.11 R)
• M60: 22,928,566 km (0.084 R)
• M61: 24,416,766 km (0.1 R)
• M62: 24,611,094 km (0.04 R)
• M63: 25,393,341 km (0.115 R)
• M64: 25,738,164 km (0.094 R)
• M65: 25,886,416 km (0.104 R)
• M66: 26,782,058 km (0.082 R)
• M67: 27,233,694 km (0.097 R)
• M68: 27,839,715 km (0.108 R)
• M69: 28,501,237 km (0.113 R)
• M70: 29,271,067 km (0.12 R)
• M71: 30,047,630 km (0.045 R)
• M72: 30,360,140 km (0.091 R)
• M73: 31,939,145 km (0.096 R)
• M74: 33,922,963 km (0.111 R)
• M75: 34,738,570 km (0.091 R)
• M76: 34,847,777 km (0.092 R)
• M77: 35,285,799 km (0.119 R)
• M78: 36,278,232 km (0.095 R)
• M79: 36,611,087 km (0.064 R)
• M80: 37,056,440 km (0.072 R)
• M81: 37,223,840 km (0.107 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.96 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 55.2

Radius: 5

Gravity: 2.21 G

Time & Orbit

Eccentricity (e): 0.217

Orbit Range: 8.58 AU - 13.34 AU

Year: 15840 Days

Day: 24.2 Hours

Environment

Temp: -193 °C

Axial Tilt: 137.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 61,507,261 km

• M1: 86,168 km (0.115 R)
• M2: 186,698 km (0.109 R)
• M3: 245,939 km (0.076 R)
• M4: 286,779 km (0.077 R)
• M5: 339,138 km (0.11 R)
• M6: 444,156 km (0.073 R)
• M7: 638,783 km (0.104 R)
• M8: 673,639 km (0.106 R)
• M9: 858,243 km (0.106 R)
• M10: 990,039 km (0.093 R)
• M11: 1,408,464 km (0.099 R)
• M12: 1,628,223 km (0.109 R)
• M13: 1,977,983 km (0.107 R)
• M14: 2,405,384 km (0.07 R)
• M15: 2,535,385 km (0.12 R)
• M16: 2,782,969 km (0.105 R)
• M17: 2,821,715 km (0.107 R)
• M18: 3,219,346 km (0.038 R)
• M19: 3,280,532 km (0.117 R)
• M20: 3,529,014 km (0.082 R)
• M21: 3,698,209 km (0.105 R)
• M22: 3,740,844 km (0.115 R)
• M23: 4,176,773 km (0.12 R)
• M24: 4,697,822 km (0.079 R)
• M25: 4,907,259 km (0.1 R)
• M26: 4,954,233 km (0.089 R)
• M27: 5,191,345 km (0.079 R)
• M28: 5,407,813 km (0.098 R)
• M29: 6,100,302 km (0.111 R)
• M30: 6,150,866 km (0.089 R)
• M31: 6,431,212 km (0.097 R)
• M32: 6,482,674 km (0.048 R)
• M33: 6,663,688 km (0.042 R)
• M34: 6,767,957 km (0.107 R)
• M35: 7,621,114 km (0.078 R)
• M36: 7,730,171 km (0.085 R)
• M37: 7,949,780 km (0.094 R)
• M38: 8,536,055 km (0.075 R)
• M39: 8,592,602 km (0.084 R)
• M40: 8,762,994 km (0.068 R)
• M41: 9,020,752 km (0.062 R)
• M42: 9,193,836 km (0.072 R)
• M43: 9,543,596 km (0.098 R)
• M44: 9,808,684 km (0.093 R)
• M45: 10,376,408 km (0.12 R)
• M46: 10,709,861 km (0.114 R)
• M47: 10,832,083 km (0.104 R)
• M48: 11,794,296 km (0.059 R)
• M49: 12,913,288 km (0.052 R)
• M50: 14,065,641 km (0.06 R)
• M51: 14,132,511 km (0.074 R)
• M52: 14,199,381 km (0.086 R)
• M53: 14,333,720 km (0.115 R)
• M54: 14,671,063 km (0.109 R)
• M55: 15,113,574 km (0.093 R)
• M56: 15,182,090 km (0.115 R)
• M57: 15,422,493 km (0.037 R)
• M58: 15,733,507 km (0.047 R)
• M59: 15,941,897 km (0.115 R)
• M60: 16,749,576 km (0.079 R)
• M61: 17,176,229 km (0.057 R)
• M62: 17,355,148 km (0.066 R)
• M63: 17,714,632 km (0.101 R)
• M64: 18,222,068 km (0.055 R)
• M65: 19,288,252 km (0.087 R)
• M66: 19,772,799 km (0.067 R)
• M67: 19,960,245 km (0.062 R)
• M68: 20,073,042 km (0.086 R)
• M69: 20,336,783 km (0.117 R)
• M70: 20,753,862 km (0.092 R)
• M71: 21,519,205 km (0.119 R)
• M72: 21,750,633 km (0.112 R)
• M73: 21,905,317 km (0.107 R)
• M74: 21,944,063 km (0.111 R)
• M75: 21,982,809 km (0.118 R)
• M76: 22,410,808 km (0.045 R)
• M77: 23,274,736 km (0.086 R)
• M78: 24,149,734 km (0.062 R)
• M79: 24,309,953 km (0.11 R)
• M80: 24,631,439 km (0.082 R)
• M81: 24,792,706 km (0.098 R)
• M82: 26,095,553 km (0.117 R)
• M83: 26,136,693 km (0.118 R)
• M84: 26,796,719 km (0.108 R)
• M85: 27,881,004 km (0.07 R)

Planet 9 - Ice Giant

Semi-Major Axis: 11.08 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 558.3

Radius: 6.9

Gravity: 11.73 G

Time & Orbit

Eccentricity (e): 0.137

Orbit Range: 9.56 AU - 12.6 AU

Year: 16101 Days

Day: 24.2 Hours

Environment

Temp: -198 °C

Axial Tilt: 35.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 61,507,261 km

• M1: 166,502 km (0.087 R)
• M2: 389,104 km (0.096 R)
• M3: 437,424 km (0.074 R)
• M4: 487,988 km (0.097 R)
• M5: 633,547 km (0.109 R)
• M6: 921,672 km (0.113 R)
• M7: 1,151,006 km (0.082 R)
• M8: 1,771,837 km (0.106 R)
• M9: 1,941,332 km (0.105 R)
• M10: 2,735,397 km (0.068 R)
• M11: 3,132,430 km (0.108 R)
• M12: 3,200,347 km (0.102 R)
• M13: 3,407,241 km (0.109 R)
• M14: 3,547,564 km (0.117 R)
• M15: 3,980,051 km (0.062 R)
• M16: 4,165,104 km (0.054 R)
• M17: 4,428,995 km (0.111 R)
• M18: 4,659,674 km (0.117 R)
• M19: 5,456,433 km (0.105 R)
• M20: 5,579,552 km (0.111 R)
• M21: 5,703,568 km (0.09 R)
• M22: 6,081,303 km (0.12 R)
• M23: 6,337,564 km (0.08 R)
• M24: 6,423,882 km (0.105 R)
• M25: 7,083,010 km (0.09 R)
• M26: 7,579,975 km (0.1 R)
• M27: 7,855,833 km (0.09 R)
• M28: 7,902,059 km (0.054 R)
• M29: 8,228,780 km (0.12 R)
• M30: 8,417,423 km (0.111 R)
• M31: 8,943,410 km (0.098 R)
• M32: 8,991,879 km (0.07 R)
• M33: 11,256,492 km (0.107 R)
• M34: 11,518,438 km (0.082 R)
• M35: 12,102,019 km (0.089 R)
• M36: 12,695,025 km (0.093 R)
• M37: 14,134,156 km (0.113 R)
• M38: 15,045,357 km (0.045 R)
• M39: 15,333,931 km (0.11 R)
• M40: 15,566,107 km (0.047 R)
• M41: 15,682,644 km (0.103 R)
• M42: 15,799,480 km (0.051 R)
• M43: 16,034,049 km (0.079 R)
• M44: 16,328,757 km (0.093 R)
• M45: 17,223,951 km (0.082 R)
• M46: 17,284,089 km (0.081 R)
• M47: 17,586,426 km (0.082 R)
• M48: 17,707,750 km (0.064 R)
• M49: 17,829,373 km (0.1 R)
• M50: 18,441,977 km (0.104 R)
• M51: 19,624,697 km (0.116 R)
• M52: 20,639,569 km (0.092 R)
• M53: 20,767,625 km (0.117 R)
• M54: 21,541,495 km (0.077 R)
• M55: 21,671,346 km (0.117 R)
• M56: 22,324,789 km (0.104 R)
• M57: 23,584,104 km (0.114 R)
• M58: 26,657,144 km (0.096 R)
• M59: 26,796,719 km (0.104 R)
• M60: 27,850,486 km (0.105 R)
• M61: 28,347,001 km (0.108 R)
• M62: 28,418,060 km (0.049 R)
• M63: 29,132,989 km (0.084 R)
• M64: 29,709,090 km (0.116 R)
• M65: 30,434,490 km (0.101 R)
• M66: 32,125,096 km (0.045 R)
• M67: 33,243,938 km (0.076 R)
• M68: 33,695,125 km (0.092 R)
• M69: 34,755,625 km (0.107 R)
• M70: 37,376,430 km (0.071 R)
• M71: 38,395,191 km (0.068 R)
• M72: 38,473,880 km (0.095 R)
• M73: 39,105,781 km (0.119 R)
• M74: 39,502,365 km (0.112 R)
• M75: 40,780,828 km (0.047 R)
• M76: 41,667,495 km (0.064 R)
• M77: 45,111,088 km (0.042 R)
• M78: 46,698,621 km (0.09 R)
• M79: 47,372,559 km (0.103 R)
• M80: 49,928,140 km (0.108 R)
• M81: 51,049,525 km (0.1 R)
• M82: 51,743,660 km (0.082 R)
• M83: 51,917,791 km (0.114 R)
• M84: 53,229,166 km (0.064 R)
• M85: 53,580,721 km (0.117 R)
• M86: 56,779,273 km (0.063 R)
• M87: 58,039,785 km (0.108 R)
• M88: 59,036,556 km (0.11 R)
• M89: 60,496,631 km (0.045 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 262 - 10,559 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit