🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.61 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.33

Radius: 1.12

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.091

Orbit Range: 0.55 AU - 0.67 AU

Year: 303 Days

Day: 31.5 Hours

Environment

Temp: -130 °C

Axial Tilt: 42.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 601.2

Radius: 14.4

Gravity: 2.9 G

Time & Orbit

Eccentricity (e): 0.2

Orbit Range: 0.62 AU - 0.92 AU

Year: 430 Days

Day: 8.6 Hours

Environment

Temp: -138 °C

Axial Tilt: 39.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (37)

Outer Limit: 42,960,745 km

• M1: 179,218 km (0.095 R)
• M2: 293,212 km (0.098 R)
• M3: 400,025 km (0.098 R)
• M4: 505,192 km (0.12 R)
• M5: 602,281 km (0.095 R)
• M6: 722,408 km (0.041 R)
• M7: 827,875 km (0.12 R)
• M8: 918,381 km (0.053 R)
• M9: 1,017,116 km (0.077 R)
• M10: 1,115,252 km (0.092 R)
• M11: 1,212,341 km (0.037 R)
• M12: 1,312,422 km (0.118 R)
• M13: 1,410,708 km (0.088 R)
• M14: 1,511,686 km (0.067 R)
• M15: 1,636,152 km (0.11 R)
• M16: 1,824,346 km (0.089 R)
• M17: 2,077,166 km (0.077 R)
• M18: 2,193,404 km (0.033 R)
• M19: 2,329,837 km (0.098 R)
• M20: 2,642,796 km (0.119 R)
• M21: 2,775,639 km (0.113 R)
• M22: 2,898,010 km (0.1 R)
• M23: 3,048,505 km (0.081 R)
• M24: 3,235,204 km (0.065 R)
• M25: 3,398,415 km (0.11 R)
• M26: 3,495,055 km (0.052 R)
• M27: 3,683,848 km (0.096 R)
• M28: 3,904,804 km (0.082 R)
• M29: 4,013,262 km (0.071 R)
• M30: 4,174,379 km (0.085 R)
• M31: 4,285,530 km (0.104 R)
• M32: 4,427,648 km (0.056 R)
• M33: 4,571,412 km (0.111 R)
• M34: 5,004,198 km (0.077 R)
• M35: 5,233,682 km (0.064 R)
• M36: 5,337,652 km (0.088 R)
• M37: 5,588,528 km (0.106 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 551.4

Radius: 13.6

Gravity: 2.98 G

Time & Orbit

Eccentricity (e): 0.113

Orbit Range: 0.81 AU - 1.01 AU

Year: 552 Days

Day: 10.3 Hours

Environment

Temp: -147 °C

Axial Tilt: 47.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 42,960,745 km

• M1: 192,532 km (0.094 R)
• M2: 278,252 km (0.103 R)
• M3: 365,168 km (0.075 R)
• M4: 467,643 km (0.111 R)
• M5: 564,433 km (0.04 R)
• M6: 657,931 km (0.062 R)
• M7: 845,378 km (0.078 R)
• M8: 955,930 km (0.116 R)
• M9: 1,152,203 km (0.097 R)
• M10: 1,483,712 km (0.106 R)
• M11: 1,637,797 km (0.087 R)
• M12: 1,737,729 km (0.114 R)
• M13: 1,827,787 km (0.106 R)
• M14: 1,937,891 km (0.105 R)
• M15: 2,050,388 km (0.115 R)
• M16: 2,268,951 km (0.096 R)
• M17: 2,401,345 km (0.083 R)
• M18: 2,549,896 km (0.119 R)
• M19: 2,985,674 km (0.061 R)
• M20: 3,257,045 km (0.119 R)
• M21: 3,437,460 km (0.081 R)
• M22: 3,590,349 km (0.09 R)
• M23: 3,737,852 km (0.092 R)
• M24: 3,942,951 km (0.102 R)
• M25: 4,038,843 km (0.091 R)
• M26: 4,127,555 km (0.118 R)
• M27: 4,257,705 km (0.074 R)
• M28: 4,405,657 km (0.047 R)
• M29: 4,505,439 km (0.112 R)
• M30: 4,614,197 km (0.088 R)
• M31: 4,834,704 km (0.091 R)
• M32: 4,980,712 km (0.09 R)
• M33: 5,110,712 km (0.062 R)
• M34: 5,259,562 km (0.116 R)
• M35: 5,481,116 km (0.069 R)
• M36: 5,570,576 km (0.109 R)
• M37: 5,723,764 km (0.076 R)
• M38: 5,851,072 km (0.044 R)
• M39: 6,034,479 km (0.061 R)
• M40: 6,136,205 km (0.102 R)
• M41: 6,285,205 km (0.081 R)
• M42: 6,397,852 km (0.057 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.25 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 664.6

Radius: 9.4

Gravity: 7.52 G

Time & Orbit

Eccentricity (e): 0.122

Orbit Range: 1.98 AU - 2.52 AU

Year: 2146 Days

Day: 14.5 Hours

Environment

Temp: -184 °C

Axial Tilt: 4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 42,960,745 km

• M1: 117,434 km (0.03 R)
• M2: 252,072 km (0.114 R)
• M3: 317,147 km (0.069 R)
• M4: 758,461 km (0.073 R)
• M5: 872,305 km (0.073 R)
• M6: 964,009 km (0.05 R)
• M7: 1,049,579 km (0.095 R)
• M8: 1,208,152 km (0.116 R)
• M9: 1,300,903 km (0.052 R)
• M10: 1,493,735 km (0.07 R)
• M11: 1,582,596 km (0.078 R)
• M12: 1,754,035 km (0.085 R)
• M13: 1,847,982 km (0.109 R)
• M14: 1,919,640 km (0.081 R)
• M15: 2,115,314 km (0.096 R)
• M16: 2,177,846 km (0.105 R)
• M17: 2,279,273 km (0.05 R)
• M18: 2,727,618 km (0.109 R)
• M19: 3,188,978 km (0.08 R)
• M20: 3,260,934 km (0.112 R)
• M21: 3,465,734 km (0.119 R)
• M22: 3,614,434 km (0.052 R)
• M23: 3,826,414 km (0.11 R)
• M24: 3,933,975 km (0.112 R)
• M25: 4,058,141 km (0.106 R)
• M26: 4,120,673 km (0.045 R)
• M27: 4,326,221 km (0.075 R)
• M28: 4,665,359 km (0.084 R)
• M29: 4,731,033 km (0.099 R)
• M30: 4,996,569 km (0.094 R)
• M31: 5,114,302 km (0.05 R)
• M32: 5,284,096 km (0.047 R)
• M33: 5,455,685 km (0.103 R)
• M34: 5,559,655 km (0.108 R)
• M35: 5,999,623 km (0.103 R)
• M36: 6,305,251 km (0.083 R)
• M37: 6,414,308 km (0.092 R)
• M38: 6,652,767 km (0.087 R)
• M39: 6,950,467 km (0.029 R)
• M40: 7,025,565 km (0.118 R)
• M41: 7,908,491 km (0.116 R)
• M42: 8,443,005 km (0.099 R)
• M43: 8,503,143 km (0.1 R)
• M44: 9,256,368 km (0.107 R)
• M45: 9,630,513 km (0.089 R)
• M46: 9,840,398 km (0.067 R)
• M47: 10,094,416 km (0.079 R)
• M48: 10,222,322 km (0.053 R)
• M49: 10,393,611 km (0.097 R)
• M50: 10,501,172 km (0.109 R)
• M51: 10,956,847 km (0.08 R)
• M52: 11,022,371 km (0.032 R)
• M53: 11,441,096 km (0.106 R)
• M54: 11,775,447 km (0.112 R)
• M55: 11,909,935 km (0.086 R)
• M56: 12,067,761 km (0.098 R)
• M57: 12,158,118 km (0.113 R)
• M58: 12,271,513 km (0.118 R)
• M59: 12,430,685 km (0.053 R)
• M60: 12,843,426 km (0.11 R)
• M61: 13,028,329 km (0.117 R)
• M62: 13,190,942 km (0.093 R)
• M63: 13,260,654 km (0.072 R)
• M64: 13,564,787 km (0.094 R)
• M65: 13,918,586 km (0.11 R)
• M66: 14,061,003 km (0.088 R)
• M67: 14,323,248 km (0.102 R)
• M68: 14,467,012 km (0.066 R)
• M69: 14,683,480 km (0.083 R)
• M70: 14,804,205 km (0.08 R)
• M71: 14,925,380 km (0.083 R)
• M72: 14,998,084 km (0.099 R)
• M73: 15,241,629 km (0.102 R)
• M74: 15,757,443 km (0.102 R)
• M75: 15,856,327 km (0.071 R)
• M76: 15,955,361 km (0.1 R)
• M77: 16,453,971 km (0.083 R)
• M78: 16,529,218 km (0.115 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.12 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 553.3

Radius: 8.2

Gravity: 8.23 G

Time & Orbit

Eccentricity (e): 0.181

Orbit Range: 4.19 AU - 6.05 AU

Year: 7366 Days

Day: 7.3 Hours

Environment

Temp: -227 °C

Axial Tilt: 17 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 42,960,745 km

• M1: 118,781 km (0.068 R)
• M2: 182,509 km (0.084 R)
• M3: 290,669 km (0.063 R)
• M4: 381,624 km (0.084 R)
• M5: 460,163 km (0.087 R)
• M6: 622,327 km (0.114 R)
• M7: 908,209 km (0.115 R)
• M8: 1,082,341 km (0.111 R)
• M9: 1,165,068 km (0.118 R)
• M10: 1,725,911 km (0.075 R)
• M11: 1,823,448 km (0.117 R)
• M12: 2,085,993 km (0.086 R)
• M13: 2,190,262 km (0.104 R)
• M14: 2,513,394 km (0.1 R)
• M15: 3,521,384 km (0.101 R)
• M16: 3,772,110 km (0.077 R)
• M17: 5,224,107 km (0.078 R)
• M18: 6,038,069 km (0.085 R)
• M19: 6,582,157 km (0.09 R)
• M20: 7,173,367 km (0.087 R)
• M21: 7,684,394 km (0.104 R)
• M22: 7,781,632 km (0.077 R)
• M23: 7,846,558 km (0.053 R)
• M24: 7,911,783 km (0.048 R)
• M25: 8,174,327 km (0.092 R)
• M26: 9,356,150 km (0.066 R)
• M27: 9,425,264 km (0.038 R)
• M28: 10,055,221 km (0.064 R)
• M29: 10,662,738 km (0.062 R)
• M30: 11,062,164 km (0.115 R)
• M31: 11,208,620 km (0.081 R)
• M32: 12,403,309 km (0.074 R)
• M33: 12,861,677 km (0.097 R)
• M34: 13,403,520 km (0.086 R)
• M35: 13,481,611 km (0.05 R)
• M36: 13,795,168 km (0.068 R)
• M37: 14,031,831 km (0.066 R)
• M38: 14,951,858 km (0.111 R)
• M39: 15,235,795 km (0.04 R)
• M40: 15,317,176 km (0.07 R)
• M41: 15,644,497 km (0.113 R)
• M42: 15,850,194 km (0.096 R)
• M43: 16,056,639 km (0.097 R)
• M44: 16,181,104 km (0.103 R)
• M45: 16,681,808 km (0.054 R)
• M46: 18,300,756 km (0.1 R)
• M47: 18,560,907 km (0.096 R)
• M48: 18,735,039 km (0.108 R)
• M49: 18,822,254 km (0.115 R)
• M50: 18,997,284 km (0.096 R)
• M51: 19,084,948 km (0.091 R)
• M52: 19,172,762 km (0.101 R)
• M53: 19,481,233 km (0.094 R)
• M54: 20,461,249 km (0.029 R)
• M55: 20,596,036 km (0.096 R)
• M56: 21,639,930 km (0.115 R)
• M57: 21,869,114 km (0.093 R)
• M58: 22,237,574 km (0.1 R)
• M59: 22,561,603 km (0.086 R)
• M60: 22,747,403 km (0.077 R)
• M61: 23,167,474 km (0.117 R)
• M62: 23,684,484 km (0.065 R)
• M63: 23,826,154 km (0.069 R)
• M64: 24,300,229 km (0.096 R)
• M65: 24,538,539 km (0.094 R)
• M66: 24,729,725 km (0.098 R)
• M67: 24,969,231 km (0.058 R)
• M68: 25,209,784 km (0.116 R)
• M69: 26,032,872 km (0.115 R)
• M70: 27,556,526 km (0.114 R)
• M71: 27,655,859 km (0.115 R)
• M72: 27,755,192 km (0.057 R)
• M73: 28,254,101 km (0.092 R)
• M74: 28,504,677 km (0.071 R)
• M75: 28,907,096 km (0.106 R)
• M76: 29,159,467 km (0.086 R)
• M77: 29,972,233 km (0.112 R)
• M78: 30,381,383 km (0.11 R)
• M79: 30,998,624 km (0.028 R)
• M80: 31,516,232 km (0.074 R)
• M81: 31,620,053 km (0.091 R)
• M82: 31,776,084 km (0.056 R)
• M83: 32,927,688 km (0.115 R)
• M84: 33,350,003 km (0.096 R)
• M85: 33,561,684 km (0.096 R)
• M86: 33,773,963 km (0.053 R)
• M87: 34,093,056 km (0.067 R)
• M88: 35,218,032 km (0.059 R)
• M89: 35,812,085 km (0.071 R)
• M90: 36,355,125 km (0.099 R)
• M91: 36,409,579 km (0.084 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 833

Radius: 9.5

Gravity: 9.23 G

Time & Orbit

Eccentricity (e): 0.047

Orbit Range: 5.48 AU - 6.02 AU

Year: 8767 Days

Day: 14.9 Hours

Environment

Temp: -217 °C

Axial Tilt: 28.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 42,960,745 km

• M1: 134,638 km (0.12 R)
• M2: 314,156 km (0.093 R)
• M3: 579,393 km (0.069 R)
• M4: 771,177 km (0.114 R)
• M5: 928,853 km (0.114 R)
• M6: 1,486,853 km (0.111 R)
• M7: 1,708,557 km (0.101 R)
• M8: 1,893,759 km (0.025 R)
• M9: 1,964,968 km (0.1 R)
• M10: 2,110,078 km (0.113 R)
• M11: 2,284,060 km (0.09 R)
• M12: 2,514,591 km (0.037 R)
• M13: 2,645,938 km (0.097 R)
• M14: 2,779,678 km (0.049 R)
• M15: 3,337,080 km (0.114 R)
• M16: 3,569,704 km (0.105 R)
• M17: 3,688,036 km (0.092 R)
• M18: 4,681,067 km (0.041 R)
• M19: 4,909,054 km (0.025 R)
• M20: 5,308,032 km (0.056 R)
• M21: 5,375,650 km (0.083 R)
• M22: 5,580,001 km (0.118 R)
• M23: 5,926,320 km (0.083 R)
• M24: 6,822,710 km (0.095 R)
• M25: 6,933,113 km (0.036 R)
• M26: 7,684,394 km (0.102 R)
• M27: 8,069,758 km (0.085 R)
• M28: 8,580,036 km (0.109 R)
• M29: 9,182,018 km (0.071 R)
• M30: 10,426,373 km (0.095 R)
• M31: 11,154,915 km (0.07 R)
• M32: 12,121,915 km (0.074 R)
• M33: 12,300,685 km (0.089 R)
• M34: 12,842,080 km (0.067 R)
• M35: 13,161,471 km (0.1 R)
• M36: 13,576,007 km (0.059 R)
• M37: 13,668,608 km (0.057 R)
• M38: 15,566,706 km (0.114 R)
• M39: 15,809,653 km (0.104 R)
• M40: 15,956,109 km (0.092 R)
• M41: 16,447,388 km (0.058 R)
• M42: 16,893,938 km (0.054 R)
• M43: 17,646,864 km (0.059 R)
• M44: 17,748,142 km (0.11 R)
• M45: 18,002,009 km (0.094 R)
• M46: 19,655,365 km (0.105 R)
• M47: 20,926,947 km (0.086 R)
• M48: 21,249,031 km (0.076 R)
• M49: 21,518,756 km (0.08 R)
• M50: 22,061,348 km (0.069 R)
• M51: 22,608,577 km (0.102 R)
• M52: 23,271,146 km (0.037 R)
• M53: 24,220,643 km (0.08 R)
• M54: 24,502,336 km (0.12 R)
• M55: 25,012,016 km (0.083 R)
• M56: 25,639,878 km (0.109 R)
• M57: 25,812,065 km (0.091 R)
• M58: 26,215,082 km (0.07 R)
• M59: 26,852,818 km (0.072 R)
• M60: 31,580,260 km (0.108 R)
• M61: 31,949,617 km (0.09 R)
• M62: 32,073,035 km (0.063 R)
• M63: 33,379,025 km (0.094 R)
• M64: 33,755,264 km (0.118 R)
• M65: 34,829,077 km (0.063 R)
• M66: 35,402,037 km (0.085 R)
• M67: 35,785,905 km (0.075 R)
• M68: 36,557,531 km (0.118 R)
• M69: 37,529,767 km (0.062 R)
• M70: 37,790,517 km (0.105 R)
• M71: 38,839,347 km (0.105 R)
• M72: 38,905,170 km (0.106 R)
• M73: 39,632,216 km (0.109 R)
• M74: 39,764,909 km (0.106 R)
• M75: 39,831,331 km (0.066 R)
• M76: 41,233,960 km (0.083 R)
• M77: 41,301,279 km (0.12 R)
• M78: 41,435,768 km (0.08 R)
• M79: 41,570,406 km (0.084 R)
• M80: 41,705,194 km (0.074 R)
• M81: 43,813,177 km (0.096 R)
• M82: 46,304,431 km (0.088 R)
• M83: 46,444,155 km (0.061 R)
• M84: 46,724,053 km (0.11 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.03 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 556.4

Radius: 8.2

Gravity: 8.27 G

Time & Orbit

Eccentricity (e): 0.225

Orbit Range: 4.67 AU - 7.39 AU

Year: 9415 Days

Day: 14.8 Hours

Environment

Temp: -218 °C

Axial Tilt: 14.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 42,960,745 km

• M1: 524,789 km (0.063 R)
• M2: 747,690 km (0.092 R)
• M3: 828,623 km (0.065 R)
• M4: 982,260 km (0.108 R)
• M5: 1,053,618 km (0.089 R)
• M6: 1,220,868 km (0.105 R)
• M7: 1,416,841 km (0.047 R)
• M8: 1,817,165 km (0.04 R)
• M9: 2,018,823 km (0.027 R)
• M10: 3,106,101 km (0.079 R)
• M11: 3,159,208 km (0.087 R)
• M12: 3,212,764 km (0.068 R)
• M13: 3,320,624 km (0.048 R)
• M14: 3,374,928 km (0.061 R)
• M15: 3,623,560 km (0.094 R)
• M16: 3,821,029 km (0.103 R)
• M17: 4,021,939 km (0.108 R)
• M18: 4,109,154 km (0.105 R)
• M19: 4,285,530 km (0.11 R)
• M20: 4,494,369 km (0.098 R)
• M21: 4,767,983 km (0.098 R)
• M22: 5,015,717 km (0.107 R)
• M23: 5,331,219 km (0.109 R)
• M24: 5,491,439 km (0.115 R)
• M25: 5,685,916 km (0.096 R)
• M26: 5,783,902 km (0.038 R)
• M27: 6,520,223 km (0.115 R)
• M28: 6,969,017 km (0.103 R)
• M29: 7,787,616 km (0.039 R)
• M30: 8,006,179 km (0.073 R)
• M31: 8,226,686 km (0.117 R)
• M32: 8,598,886 km (0.089 R)
• M33: 9,514,125 km (0.119 R)
• M34: 9,983,414 km (0.08 R)
• M35: 10,181,182 km (0.042 R)
• M36: 10,620,850 km (0.086 R)
• M37: 11,107,492 km (0.111 R)
• M38: 11,560,026 km (0.077 R)
• M39: 11,934,769 km (0.115 R)
• M40: 12,186,841 km (0.113 R)
• M41: 12,313,550 km (0.106 R)
• M42: 12,996,614 km (0.042 R)
• M43: 13,082,932 km (0.115 R)
• M44: 13,516,916 km (0.112 R)
• M45: 13,867,723 km (0.074 R)
• M46: 14,044,248 km (0.069 R)
• M47: 14,757,531 km (0.053 R)
• M48: 15,803,669 km (0.088 R)
• M49: 15,941,747 km (0.056 R)
• M50: 17,203,606 km (0.091 R)
• M51: 17,488,440 km (0.1 R)
• M52: 17,583,734 km (0.029 R)
• M53: 17,822,642 km (0.096 R)
• M54: 17,918,534 km (0.099 R)
• M55: 18,352,068 km (0.114 R)
• M56: 19,327,895 km (0.074 R)
• M57: 19,574,433 km (0.102 R)
• M58: 19,971,166 km (0.12 R)
• M59: 20,120,614 km (0.028 R)
• M60: 20,270,511 km (0.057 R)
• M61: 20,370,592 km (0.075 R)
• M62: 21,025,083 km (0.109 R)
• M63: 21,278,801 km (0.077 R)
• M64: 21,482,404 km (0.056 R)
• M65: 21,891,554 km (0.096 R)
• M66: 21,994,328 km (0.086 R)
• M67: 23,553,886 km (0.106 R)
• M68: 23,606,544 km (0.116 R)
• M69: 23,764,519 km (0.087 R)
• M70: 23,870,135 km (0.03 R)
• M71: 24,987,931 km (0.08 R)
• M72: 25,148,898 km (0.085 R)
• M73: 25,202,753 km (0.063 R)
• M74: 27,772,695 km (0.061 R)
• M75: 27,939,497 km (0.048 R)
• M76: 28,274,297 km (0.111 R)
• M77: 28,498,095 km (0.106 R)
• M78: 29,004,035 km (0.094 R)
• M79: 29,740,057 km (0.092 R)
• M80: 30,596,804 km (0.084 R)
• M81: 30,654,249 km (0.089 R)
• M82: 32,862,314 km (0.037 R)
• M83: 33,629,452 km (0.117 R)
• M84: 34,821,148 km (0.099 R)
• M85: 35,603,096 km (0.104 R)
• M86: 35,905,434 km (0.113 R)
• M87: 36,573,538 km (0.098 R)
• M88: 37,061,975 km (0.104 R)
• M89: 38,664,318 km (0.089 R)
• M90: 40,289,250 km (0.101 R)
• M91: 40,856,824 km (0.048 R)
• M92: 40,983,384 km (0.047 R)
• M93: 42,319,442 km (0.115 R)

Kuiper Belt

Range: 30 - 52 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 188 - 15,766 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit