🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.76 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.59

Radius: 1.2

Gravity: 1.1 G

Time & Orbit

Eccentricity (e): 0.058

Orbit Range: 1.66 AU - 1.86 AU

Year: 824 Days

Day: 13.3 Hours

Environment

Temp: -36 °C

Axial Tilt: 20.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 48,644,163 km

• M1: 71,957 km (0.057 R)
• M2: 193,580 km (0.049 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.83 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.76

Radius: 1.5

Gravity: 1.23 G

Time & Orbit

Eccentricity (e): 0.189

Orbit Range: 1.48 AU - 2.18 AU

Year: 874 Days

Day: 15.6 Hours

Environment

Temp: -42 °C

Axial Tilt: 26 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 2.32 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.47

Radius: 1.44

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.072

Orbit Range: 2.15 AU - 2.49 AU

Year: 1248 Days

Day: 46.7 Hours

Environment

Temp: -73 °C

Axial Tilt: 38.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 2.57 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.85

Radius: 1.28

Gravity: 1.13 G

Time & Orbit

Eccentricity (e): 0.097

Orbit Range: 2.32 AU - 2.82 AU

Year: 1455 Days

Day: 45.6 Hours

Environment

Temp: -79 °C

Axial Tilt: 14 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 48,644,163 km

• M1: 635,791 km (0.108 R)

Planet 5 - Terrestrial

Semi-Major Axis: 4.95 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.15

Radius: 1.58

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.125

Orbit Range: 4.33 AU - 5.57 AU

Year: 3889 Days

Day: 40.7 Hours

Environment

Temp: -135 °C

Axial Tilt: 22 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 6.41 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 842.6

Radius: 10.5

Gravity: 7.64 G

Time & Orbit

Eccentricity (e): 0.164

Orbit Range: 5.36 AU - 7.46 AU

Year: 5730 Days

Day: 10.8 Hours

Environment

Temp: -142 °C

Axial Tilt: 0.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 48,644,163 km

• M1: 478,863 km (0.091 R)
• M2: 549,174 km (0.069 R)
• M3: 636,539 km (0.108 R)
• M4: 841,189 km (0.038 R)
• M5: 1,164,320 km (0.068 R)
• M6: 1,263,653 km (0.109 R)
• M7: 1,489,396 km (0.03 R)
• M8: 1,634,955 km (0.108 R)
• M9: 1,709,455 km (0.095 R)
• M10: 1,842,896 km (0.116 R)
• M11: 2,432,461 km (0.112 R)
• M12: 3,100,565 km (0.094 R)
• M13: 3,359,370 km (0.088 R)
• M14: 3,625,355 km (0.096 R)
• M15: 3,748,474 km (0.095 R)
• M16: 3,848,106 km (0.093 R)
• M17: 4,411,641 km (0.116 R)
• M18: 4,516,809 km (0.119 R)
• M19: 5,000,907 km (0.083 R)
• M20: 5,558,309 km (0.117 R)
• M21: 5,643,729 km (0.097 R)
• M22: 5,786,894 km (0.048 R)
• M23: 6,194,249 km (0.069 R)
• M24: 6,580,960 km (0.068 R)
• M25: 7,408,984 km (0.096 R)
• M26: 7,534,497 km (0.108 R)
• M27: 8,011,415 km (0.062 R)
• M28: 8,269,770 km (0.114 R)
• M29: 8,498,057 km (0.074 R)
• M30: 8,662,465 km (0.081 R)
• M31: 8,894,341 km (0.094 R)
• M32: 9,128,312 km (0.066 R)
• M33: 9,330,569 km (0.111 R)
• M34: 9,670,904 km (0.077 R)
• M35: 10,119,398 km (0.094 R)
• M36: 10,363,692 km (0.039 R)
• M37: 10,716,144 km (0.062 R)
• M38: 11,072,486 km (0.09 R)
• M39: 11,541,775 km (0.096 R)
• M40: 11,907,093 km (0.112 R)
• M41: 12,313,251 km (0.052 R)
• M42: 12,724,196 km (0.085 R)
• M43: 13,025,786 km (0.058 R)
• M44: 13,828,827 km (0.058 R)
• M45: 14,216,884 km (0.029 R)
• M46: 14,412,259 km (0.119 R)
• M47: 14,490,648 km (0.09 R)
• M48: 14,766,207 km (0.115 R)
• M49: 15,202,584 km (0.108 R)
• M50: 17,783,148 km (0.114 R)
• M51: 18,120,491 km (0.099 R)
• M52: 18,374,807 km (0.083 R)
• M53: 18,545,050 km (0.099 R)
• M54: 18,758,675 km (0.095 R)
• M55: 18,887,180 km (0.114 R)
• M56: 18,972,900 km (0.072 R)
• M57: 19,490,807 km (0.044 R)
• M58: 19,620,958 km (0.119 R)
• M59: 19,751,407 km (0.105 R)
• M60: 21,205,498 km (0.086 R)
• M61: 21,294,808 km (0.077 R)
• M62: 21,473,578 km (0.116 R)
• M63: 21,563,187 km (0.116 R)
• M64: 21,922,970 km (0.086 R)
• M65: 22,239,369 km (0.117 R)
• M66: 22,420,831 km (0.083 R)
• M67: 23,013,987 km (0.093 R)
• M68: 23,612,229 km (0.109 R)
• M69: 23,797,431 km (0.08 R)
• M70: 23,890,182 km (0.063 R)
• M71: 24,075,982 km (0.058 R)
• M72: 24,824,271 km (0.111 R)
• M73: 25,343,226 km (0.057 R)
• M74: 25,437,921 km (0.119 R)
• M75: 25,532,766 km (0.081 R)
• M76: 25,865,621 km (0.069 R)
• M77: 26,295,715 km (0.059 R)
• M78: 26,680,032 km (0.033 R)
• M79: 27,892,972 km (0.08 R)
• M80: 28,186,782 km (0.107 R)
• M81: 28,432,272 km (0.075 R)
• M82: 29,024,680 km (0.086 R)
• M83: 29,770,874 km (0.066 R)
• M84: 30,021,001 km (0.095 R)
• M85: 31,587,291 km (0.068 R)
• M86: 31,842,505 km (0.04 R)
• M87: 33,751,524 km (0.081 R)
• M88: 34,746,200 km (0.117 R)
• M89: 35,115,108 km (0.113 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 86.1

Radius: 9.2

Gravity: 1.02 G

Time & Orbit

Eccentricity (e): 0.126

Orbit Range: 5.62 AU - 7.24 AU

Year: 5757 Days

Day: 10.3 Hours

Environment

Temp: -145 °C

Axial Tilt: 28.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 48,644,163 km

• M1: 115,938 km (0.107 R)
• M2: 183,557 km (0.108 R)
• M3: 271,969 km (0.099 R)
• M4: 400,623 km (0.111 R)
• M5: 516,113 km (0.076 R)
• M6: 590,014 km (0.114 R)
• M7: 659,876 km (0.111 R)
• M8: 741,257 km (0.106 R)
• M9: 887,863 km (0.108 R)
• M10: 1,035,068 km (0.118 R)
• M11: 1,180,477 km (0.112 R)
• M12: 1,260,960 km (0.091 R)
• M13: 1,374,655 km (0.116 R)
• M14: 1,634,955 km (0.026 R)
• M15: 1,982,321 km (0.09 R)
• M16: 2,403,888 km (0.047 R)
• M17: 2,559,470 km (0.071 R)
• M18: 2,772,049 km (0.085 R)
• M19: 3,171,924 km (0.12 R)
• M20: 3,242,833 km (0.098 R)
• M21: 3,314,191 km (0.119 R)
• M22: 3,415,020 km (0.112 R)
• M23: 3,473,064 km (0.112 R)
• M24: 3,964,792 km (0.065 R)
• M25: 4,367,809 km (0.034 R)
• M26: 4,430,939 km (0.118 R)
• M27: 4,622,275 km (0.103 R)
• M28: 4,686,602 km (0.099 R)
• M29: 4,881,678 km (0.105 R)
• M30: 5,013,174 km (0.039 R)
• M31: 5,095,902 km (0.112 R)
• M32: 5,246,098 km (0.062 R)
• M33: 5,313,417 km (0.076 R)
• M34: 5,568,033 km (0.05 R)
• M35: 5,879,047 km (0.087 R)
• M36: 6,089,531 km (0.099 R)
• M37: 6,481,777 km (0.106 R)
• M38: 6,772,296 km (0.097 R)
• M39: 6,845,599 km (0.12 R)
• M40: 7,030,053 km (0.1 R)
• M41: 7,178,753 km (0.097 R)
• M42: 7,328,500 km (0.107 R)
• M43: 7,498,294 km (0.083 R)
• M44: 7,669,284 km (0.096 R)
• M45: 7,995,857 km (0.098 R)
• M46: 8,643,017 km (0.104 R)
• M47: 8,842,431 km (0.09 R)
• M48: 9,225,551 km (0.106 R)
• M49: 9,552,273 km (0.057 R)
• M50: 9,758,568 km (0.109 R)
• M51: 9,820,651 km (0.052 R)
• M52: 9,924,622 km (0.069 R)
• M53: 10,322,702 km (0.083 R)
• M54: 10,385,982 km (0.101 R)
• M55: 10,491,897 km (0.042 R)
• M56: 10,726,018 km (0.102 R)
• M57: 11,395,169 km (0.06 R)
• M58: 11,504,375 km (0.05 R)
• M59: 11,657,863 km (0.095 R)
• M60: 11,789,958 km (0.094 R)
• M61: 11,900,361 km (0.116 R)
• M62: 12,256,254 km (0.103 R)
• M63: 12,390,593 km (0.079 R)
• M64: 12,638,028 km (0.047 R)
• M65: 12,864,519 km (0.114 R)
• M66: 13,436,582 km (0.088 R)
• M67: 13,876,848 km (0.096 R)
• M68: 14,110,520 km (0.071 R)
• M69: 14,227,954 km (0.055 R)
• M70: 14,510,844 km (0.077 R)
• M71: 14,605,539 km (0.093 R)
• M72: 15,202,136 km (0.114 R)
• M73: 16,050,804 km (0.117 R)
• M74: 16,246,927 km (0.098 R)

Planet 8 - Gas Giant

Semi-Major Axis: 7.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 977.8

Radius: 11.6

Gravity: 7.27 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 6.61 AU - 7.61 AU

Year: 6694 Days

Day: 8.7 Hours

Environment

Temp: -154 °C

Axial Tilt: 37.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 48,644,163 km

• M1: 145,559 km (0.106 R)
• M2: 473,477 km (0.054 R)
• M3: 675,135 km (0.083 R)
• M4: 874,100 km (0.105 R)
• M5: 1,237,025 km (0.071 R)
• M6: 1,330,374 km (0.119 R)
• M7: 1,465,311 km (0.099 R)
• M8: 1,625,381 km (0.071 R)
• M9: 2,051,136 km (0.08 R)
• M10: 2,559,171 km (0.037 R)
• M11: 2,852,682 km (0.118 R)
• M12: 3,419,059 km (0.095 R)
• M13: 4,247,233 km (0.112 R)
• M14: 4,773,070 km (0.094 R)
• M15: 5,537,664 km (0.108 R)
• M16: 5,726,906 km (0.077 R)
• M17: 6,906,934 km (0.059 R)
• M18: 7,247,867 km (0.073 R)
• M19: 7,910,885 km (0.115 R)
• M20: 8,195,869 km (0.031 R)
• M21: 8,447,941 km (0.067 R)
• M22: 8,996,966 km (0.088 R)
• M23: 9,331,915 km (0.114 R)
• M24: 9,823,045 km (0.044 R)
• M25: 10,052,678 km (0.084 R)
• M26: 11,147,136 km (0.08 R)
• M27: 11,668,185 km (0.098 R)
• M28: 12,197,163 km (0.056 R)
• M29: 12,444,000 km (0.11 R)
• M30: 12,651,043 km (0.058 R)
• M31: 12,817,396 km (0.096 R)
• M32: 13,068,272 km (0.109 R)
• M33: 13,617,595 km (0.083 R)
• M34: 13,702,866 km (0.113 R)
• M35: 13,959,426 km (0.117 R)
• M36: 14,782,514 km (0.097 R)
• M37: 15,178,050 km (0.12 R)
• M38: 15,576,878 km (0.109 R)
• M39: 16,385,156 km (0.104 R)
• M40: 16,657,573 km (0.039 R)
• M41: 17,995,427 km (0.116 R)
• M42: 18,511,989 km (0.089 R)
• M43: 19,224,074 km (0.101 R)
• M44: 19,367,688 km (0.12 R)
• M45: 19,511,601 km (0.098 R)
• M46: 19,848,645 km (0.031 R)
• M47: 20,284,873 km (0.11 R)
• M48: 22,161,578 km (0.049 R)
• M49: 22,968,210 km (0.081 R)
• M50: 23,426,279 km (0.092 R)
• M51: 23,990,113 km (0.12 R)
• M52: 24,144,648 km (0.064 R)
• M53: 24,247,870 km (0.101 R)
• M54: 24,714,316 km (0.083 R)
• M55: 26,078,050 km (0.06 R)
• M56: 26,183,966 km (0.063 R)
• M57: 27,036,524 km (0.094 R)
• M58: 27,681,889 km (0.1 R)
• M59: 27,790,048 km (0.045 R)
• M60: 28,441,398 km (0.067 R)
• M61: 29,152,586 km (0.092 R)
• M62: 31,829,341 km (0.074 R)
• M63: 31,999,134 km (0.11 R)
• M64: 32,624,752 km (0.101 R)
• M65: 32,910,335 km (0.09 R)
• M66: 33,484,192 km (0.083 R)
• M67: 34,409,305 km (0.086 R)
• M68: 34,699,974 km (0.06 R)
• M69: 34,874,854 km (0.119 R)
• M70: 35,930,267 km (0.12 R)
• M71: 36,048,150 km (0.114 R)
• M72: 36,461,938 km (0.107 R)
• M73: 36,936,612 km (0.116 R)
• M74: 38,553,914 km (0.101 R)
• M75: 38,674,640 km (0.103 R)
• M76: 39,401,686 km (0.096 R)
• M77: 40,561,967 km (0.115 R)
• M78: 41,053,844 km (0.115 R)

Planet 9 - Gas Giant

Semi-Major Axis: 9.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 841.1

Radius: 9

Gravity: 10.38 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 9.28 AU - 10.02 AU

Year: 10585 Days

Day: 5.7 Hours

Environment

Temp: -162 °C

Axial Tilt: 48.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 48,644,163 km

• M1: 125,363 km (0.11 R)
• M2: 262,395 km (0.102 R)
• M3: 374,593 km (0.066 R)
• M4: 835,953 km (0.062 R)
• M5: 1,076,207 km (0.115 R)
• M6: 1,204,562 km (0.1 R)
• M7: 1,819,559 km (0.111 R)
• M8: 2,105,889 km (0.082 R)
• M9: 2,240,976 km (0.076 R)
• M10: 3,171,624 km (0.099 R)
• M11: 3,453,018 km (0.094 R)
• M12: 3,516,597 km (0.061 R)
• M13: 3,645,102 km (0.092 R)
• M14: 3,939,959 km (0.071 R)
• M15: 4,552,562 km (0.076 R)
• M16: 4,834,554 km (0.098 R)
• M17: 4,905,913 km (0.027 R)
• M18: 5,049,676 km (0.084 R)
• M19: 5,231,438 km (0.079 R)
• M20: 5,865,433 km (0.117 R)
• M21: 6,018,322 km (0.087 R)
• M22: 6,405,930 km (0.085 R)
• M23: 6,881,801 km (0.115 R)
• M24: 7,909,688 km (0.056 R)
• M25: 8,549,219 km (0.1 R)
• M26: 9,072,812 km (0.049 R)
• M27: 9,427,658 km (0.071 R)
• M28: 10,196,740 km (0.118 R)
• M29: 10,751,898 km (0.048 R)
• M30: 11,602,811 km (0.101 R)
• M31: 13,318,698 km (0.102 R)
• M32: 13,772,578 km (0.112 R)
• M33: 15,480,088 km (0.096 R)
• M34: 15,691,620 km (0.07 R)
• M35: 16,331,749 km (0.115 R)
• M36: 16,547,020 km (0.112 R)
• M37: 17,417,680 km (0.116 R)
• M38: 17,582,537 km (0.073 R)
• M39: 17,692,791 km (0.117 R)
• M40: 18,358,950 km (0.036 R)
• M41: 20,232,962 km (0.106 R)
• M42: 21,221,954 km (0.094 R)
• M43: 21,280,746 km (0.112 R)
• M44: 21,870,311 km (0.097 R)
• M45: 22,048,183 km (0.039 R)
• M46: 22,345,883 km (0.109 R)
• M47: 23,367,786 km (0.057 R)
• M48: 24,466,433 km (0.066 R)
• M49: 24,836,388 km (0.067 R)
• M50: 25,769,280 km (0.117 R)
• M51: 27,222,025 km (0.105 R)
• M52: 28,766,025 km (0.093 R)
• M53: 28,895,876 km (0.055 R)
• M54: 29,417,673 km (0.096 R)
• M55: 30,272,176 km (0.039 R)
• M56: 30,536,815 km (0.058 R)
• M57: 30,735,631 km (0.054 R)
• M58: 30,802,052 km (0.054 R)
• M59: 31,602,700 km (0.06 R)
• M60: 32,005,567 km (0.074 R)
• M61: 32,680,702 km (0.058 R)
• M62: 33,088,207 km (0.073 R)
• M63: 33,156,274 km (0.061 R)
• M64: 33,292,408 km (0.115 R)
• M65: 33,360,624 km (0.119 R)
• M66: 34,113,999 km (0.059 R)
• M67: 34,251,480 km (0.098 R)
• M68: 35,011,437 km (0.117 R)
• M69: 36,547,957 km (0.058 R)
• M70: 37,395,279 km (0.095 R)
• M71: 37,608,157 km (0.041 R)
• M72: 38,463,557 km (0.057 R)
• M73: 39,758,626 km (0.105 R)
• M74: 39,975,842 km (0.094 R)
• M75: 40,048,397 km (0.095 R)
• M76: 40,120,952 km (0.087 R)
• M77: 40,702,888 km (0.066 R)
• M78: 41,507,575 km (0.07 R)
• M79: 45,155,668 km (0.111 R)
• M80: 45,533,553 km (0.069 R)
• M81: 45,685,095 km (0.111 R)
• M82: 46,140,621 km (0.097 R)
• M83: 46,826,527 km (0.09 R)
• M84: 47,592,767 km (0.068 R)
• M85: 47,669,661 km (0.072 R)
• M86: 49,448,679 km (0.083 R)
• M87: 51,564,591 km (0.098 R)
• M88: 51,880,542 km (0.059 R)
• M89: 52,832,283 km (0.107 R)

Planet 10 - Ice Giant

Semi-Major Axis: 16.37 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 130.9

Radius: 4.3

Gravity: 7.08 G

Time & Orbit

Eccentricity (e): 0.23

Orbit Range: 12.6 AU - 20.14 AU

Year: 23387 Days

Day: 15.2 Hours

Environment

Temp: -198 °C

Axial Tilt: 0.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 48,644,163 km

• M1: 532,868 km (0.119 R)
• M2: 680,222 km (0.051 R)
• M3: 896,091 km (0.072 R)
• M4: 934,239 km (0.068 R)
• M5: 1,011,880 km (0.103 R)
• M6: 1,215,333 km (0.09 R)
• M7: 1,659,639 km (0.073 R)
• M8: 2,383,842 km (0.076 R)
• M9: 2,736,444 km (0.04 R)
• M10: 2,904,592 km (0.089 R)
• M11: 4,629,755 km (0.088 R)
• M12: 4,662,966 km (0.089 R)
• M13: 4,729,537 km (0.118 R)
• M14: 4,863,726 km (0.09 R)
• M15: 5,910,013 km (0.053 R)
• M16: 6,607,140 km (0.119 R)
• M17: 7,291,400 km (0.119 R)
• M18: 8,077,687 km (0.066 R)
• M19: 8,197,963 km (0.094 R)
• M20: 8,278,447 km (0.114 R)
• M21: 8,399,771 km (0.111 R)
• M22: 11,887,944 km (0.072 R)
• M23: 12,903,415 km (0.084 R)
• M24: 13,802,348 km (0.029 R)
• M25: 14,672,709 km (0.104 R)
• M26: 16,212,520 km (0.116 R)
• M27: 17,027,080 km (0.09 R)
• M28: 17,543,043 km (0.104 R)
• M29: 18,116,452 km (0.111 R)
• M30: 18,961,381 km (0.112 R)
• M31: 19,442,338 km (0.101 R)
• M32: 19,711,165 km (0.072 R)
• M33: 19,981,339 km (0.07 R)
• M34: 20,525,277 km (0.083 R)
• M35: 21,350,459 km (0.093 R)
• M36: 23,260,225 km (0.116 R)
• M37: 25,282,639 km (0.081 R)
• M38: 26,582,345 km (0.106 R)
• M39: 26,761,264 km (0.053 R)
• M40: 27,420,691 km (0.101 R)
• M41: 27,541,118 km (0.075 R)
• M42: 28,024,768 km (0.108 R)
• M43: 29,430,838 km (0.101 R)
• M44: 32,374,475 km (0.116 R)
• M45: 35,607,435 km (0.104 R)
• M46: 36,200,142 km (0.115 R)
• M47: 37,997,859 km (0.093 R)
• M48: 41,956,518 km (0.118 R)
• M49: 43,562,152 km (0.107 R)
• M50: 44,407,978 km (0.077 R)
• M51: 44,691,017 km (0.116 R)
• M52: 44,903,746 km (0.081 R)
• M53: 46,761,452 km (0.111 R)
• M54: 47,917,096 km (0.098 R)
• M55: 48,571,287 km (0.119 R)

Kuiper Belt

Range: 31.1 - 54.1 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 176 - 14,442 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit