🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 1.47 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 387.2

Radius: 11.3

Gravity: 3.03 G

Time & Orbit

Eccentricity (e): 0.197

Orbit Range: 1.18 AU - 1.76 AU

Year: 1189 Days

Day: 13.8 Hours

Environment

Temp: -184 °C

Axial Tilt: 6.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (53)

Outer Limit: 90,347,934 km

• M1: 175,628 km (0.087 R)
• M2: 249,230 km (0.034 R)
• M3: 322,832 km (0.12 R)
• M4: 408,253 km (0.087 R)
• M5: 552,764 km (0.071 R)
• M6: 629,807 km (0.038 R)
• M7: 722,109 km (0.101 R)
• M8: 867,518 km (0.105 R)
• M9: 965,953 km (0.116 R)
• M10: 1,042,548 km (0.098 R)
• M11: 1,114,654 km (0.074 R)
• M12: 1,292,376 km (0.112 R)
• M13: 1,576,762 km (0.079 R)
• M14: 1,653,056 km (0.103 R)
• M15: 1,754,185 km (0.088 R)
• M16: 1,849,329 km (0.116 R)
• M17: 1,970,952 km (0.091 R)
• M18: 2,230,803 km (0.111 R)
• M19: 2,466,270 km (0.078 R)
• M20: 2,636,962 km (0.046 R)
• M21: 2,719,240 km (0.093 R)
• M22: 2,933,315 km (0.042 R)
• M23: 3,162,798 km (0.115 R)
• M24: 3,659,912 km (0.091 R)
• M25: 3,844,964 km (0.05 R)
• M26: 3,970,028 km (0.096 R)
• M27: 4,192,181 km (0.078 R)
• M28: 4,288,672 km (0.119 R)
• M29: 4,375,139 km (0.028 R)
• M30: 4,516,809 km (0.102 R)
• M31: 4,660,123 km (0.031 R)
• M32: 4,737,914 km (0.062 R)
• M33: 4,860,884 km (0.079 R)
• M34: 5,225,154 km (0.119 R)
• M35: 5,480,668 km (0.107 R)
• M36: 5,657,343 km (0.067 R)
• M37: 5,967,908 km (0.115 R)
• M38: 6,076,815 km (0.089 R)
• M39: 6,161,936 km (0.094 R)
• M40: 6,706,024 km (0.11 R)
• M41: 6,844,551 km (0.041 R)
• M42: 7,073,287 km (0.106 R)
• M43: 7,162,896 km (0.062 R)
• M44: 7,239,939 km (0.055 R)
• M45: 7,369,191 km (0.103 R)
• M46: 7,512,057 km (0.082 R)
• M47: 8,335,145 km (0.027 R)
• M48: 8,743,696 km (0.078 R)
• M49: 8,909,002 km (0.119 R)
• M50: 9,117,093 km (0.103 R)
• M51: 9,270,580 km (0.117 R)
• M52: 9,439,177 km (0.106 R)
• M53: 9,509,787 km (0.051 R)

Planet 2 - Gas Giant

Semi-Major Axis: 2.06 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 146.4

Radius: 14.2

Gravity: 0.73 G

Time & Orbit

Eccentricity (e): 0.075

Orbit Range: 1.91 AU - 2.21 AU

Year: 1972 Days

Day: 9.3 Hours

Environment

Temp: -195 °C

Axial Tilt: 40 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (52)

Outer Limit: 90,347,934 km

• M1: 186,100 km (0.057 R)
• M2: 286,330 km (0.097 R)
• M3: 582,833 km (0.076 R)
• M4: 686,654 km (0.112 R)
• M5: 798,105 km (0.04 R)
• M6: 904,469 km (0.102 R)
• M7: 1,107,024 km (0.115 R)
• M8: 1,200,673 km (0.104 R)
• M9: 1,311,375 km (0.052 R)
• M10: 1,536,221 km (0.11 R)
• M11: 1,672,803 km (0.037 R)
• M12: 1,789,939 km (0.064 R)
• M13: 1,999,974 km (0.116 R)
• M14: 2,091,378 km (0.055 R)
• M15: 2,243,968 km (0.119 R)
• M16: 2,339,262 km (0.104 R)
• M17: 2,462,381 km (0.096 R)
• M18: 2,597,019 km (0.118 R)
• M19: 2,780,276 km (0.089 R)
• M20: 2,977,446 km (0.045 R)
• M21: 3,140,658 km (0.074 R)
• M22: 3,287,114 km (0.089 R)
• M23: 3,396,021 km (0.082 R)
• M24: 3,496,102 km (0.119 R)
• M25: 3,668,589 km (0.101 R)
• M26: 4,043,182 km (0.102 R)
• M27: 4,181,709 km (0.098 R)
• M28: 4,332,504 km (0.101 R)
• M29: 4,706,499 km (0.083 R)
• M30: 5,102,634 km (0.047 R)
• M31: 5,264,050 km (0.12 R)
• M32: 5,474,235 km (0.088 R)
• M33: 5,580,449 km (0.088 R)
• M34: 5,699,230 km (0.095 R)
• M35: 5,854,812 km (0.1 R)
• M36: 6,024,157 km (0.089 R)
• M37: 6,158,196 km (0.083 R)
• M38: 6,342,800 km (0.095 R)
• M39: 6,516,782 km (0.095 R)
• M40: 6,616,863 km (0.042 R)
• M41: 6,932,964 km (0.044 R)
• M42: 7,086,601 km (0.112 R)
• M43: 7,228,270 km (0.109 R)
• M44: 7,751,862 km (0.114 R)
• M45: 7,951,276 km (0.054 R)
• M46: 8,085,316 km (0.079 R)
• M47: 8,369,103 km (0.034 R)
• M48: 8,464,397 km (0.107 R)
• M49: 8,587,516 km (0.106 R)
• M50: 8,794,111 km (0.067 R)
• M51: 8,946,701 km (0.04 R)
• M52: 9,409,556 km (0.112 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 288.2

Radius: 14.8

Gravity: 1.32 G

Time & Orbit

Eccentricity (e): 0.014

Orbit Range: 3.7 AU - 3.8 AU

Year: 4843 Days

Day: 6.4 Hours

Environment

Temp: -225 °C

Axial Tilt: 15.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 90,347,934 km

• M1: 184,753 km (0.079 R)
• M2: 292,464 km (0.052 R)
• M3: 407,804 km (0.11 R)
• M4: 644,318 km (0.112 R)
• M5: 747,690 km (0.067 R)
• M6: 963,709 km (0.073 R)
• M7: 1,143,077 km (0.03 R)
• M8: 1,237,474 km (0.113 R)
• M9: 1,409,362 km (0.065 R)
• M10: 1,683,126 km (0.115 R)
• M11: 1,931,757 km (0.077 R)
• M12: 2,060,860 km (0.076 R)
• M13: 2,237,685 km (0.064 R)
• M14: 2,389,078 km (0.115 R)
• M15: 3,012,452 km (0.119 R)
• M16: 3,543,525 km (0.061 R)
• M17: 3,902,111 km (0.058 R)
• M18: 4,030,316 km (0.111 R)
• M19: 4,234,966 km (0.113 R)
• M20: 4,519,501 km (0.114 R)
• M21: 4,751,677 km (0.076 R)
• M22: 4,908,755 km (0.072 R)
• M23: 5,047,582 km (0.073 R)
• M24: 5,227,997 km (0.117 R)
• M25: 5,533,775 km (0.066 R)
• M26: 5,678,436 km (0.064 R)
• M27: 6,355,815 km (0.103 R)
• M28: 6,551,190 km (0.064 R)
• M29: 6,903,194 km (0.086 R)
• M30: 7,351,987 km (0.068 R)
• M31: 7,671,977 km (0.097 R)
• M32: 7,856,731 km (0.097 R)
• M33: 7,996,455 km (0.103 R)
• M34: 8,136,927 km (0.079 R)
• M35: 8,635,088 km (0.086 R)
• M36: 9,094,503 km (0.078 R)
• M37: 9,290,327 km (0.062 R)
• M38: 9,388,762 km (0.099 R)
• M39: 9,586,680 km (0.106 R)
• M40: 9,861,192 km (0.12 R)
• M41: 10,112,966 km (0.096 R)
• M42: 10,265,107 km (0.067 R)
• M43: 10,545,902 km (0.079 R)
• M44: 10,855,270 km (0.11 R)
• M45: 11,011,002 km (0.059 R)
• M46: 11,324,858 km (0.096 R)
• M47: 11,482,833 km (0.084 R)
• M48: 11,747,771 km (0.062 R)
• M49: 12,014,953 km (0.068 R)
• M50: 12,365,012 km (0.077 R)
• M51: 12,582,228 km (0.105 R)
• M52: 12,800,791 km (0.099 R)
• M53: 12,965,498 km (0.088 R)
• M54: 13,519,459 km (0.119 R)
• M55: 14,024,800 km (0.11 R)
• M56: 14,422,132 km (0.06 R)
• M57: 14,536,275 km (0.081 R)
• M58: 14,708,163 km (0.102 R)
• M59: 15,169,822 km (0.087 R)
• M60: 15,344,254 km (0.105 R)
• M61: 16,137,122 km (0.092 R)
• M62: 17,336,299 km (0.107 R)
• M63: 17,457,772 km (0.087 R)
• M64: 18,440,032 km (0.05 R)
• M65: 18,626,281 km (0.064 R)
• M66: 18,781,863 km (0.113 R)
• M67: 18,938,043 km (0.092 R)
• M68: 19,534,939 km (0.098 R)
• M69: 20,074,389 km (0.082 R)
• M70: 20,586,612 km (0.067 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 486

Radius: 10.2

Gravity: 4.67 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 3.71 AU - 5.67 AU

Year: 6773 Days

Day: 13.5 Hours

Environment

Temp: -226 °C

Axial Tilt: 7.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 90,347,934 km

• M1: 129,851 km (0.105 R)
• M2: 233,971 km (0.073 R)
• M3: 323,730 km (0.093 R)
• M4: 828,623 km (0.099 R)
• M5: 1,244,355 km (0.116 R)
• M6: 1,325,138 km (0.109 R)
• M7: 1,630,916 km (0.101 R)
• M8: 1,738,028 km (0.047 R)
• M9: 1,865,785 km (0.078 R)
• M10: 1,959,134 km (0.097 R)
• M11: 2,092,425 km (0.108 R)
• M12: 2,572,635 km (0.079 R)
• M13: 2,804,212 km (0.104 R)
• M14: 3,130,934 km (0.116 R)
• M15: 3,242,534 km (0.119 R)
• M16: 3,355,630 km (0.058 R)
• M17: 4,061,283 km (0.102 R)
• M18: 4,431,089 km (0.114 R)
• M19: 4,531,619 km (0.099 R)
• M20: 4,993,278 km (0.077 R)
• M21: 5,229,642 km (0.079 R)
• M22: 5,362,784 km (0.026 R)
• M23: 5,741,117 km (0.106 R)
• M24: 5,961,326 km (0.105 R)
• M25: 6,296,724 km (0.061 R)
• M26: 6,753,596 km (0.1 R)
• M27: 7,459,099 km (0.116 R)
• M28: 10,676,202 km (0.065 R)
• M29: 10,913,314 km (0.091 R)
• M30: 11,186,330 km (0.11 R)
• M31: 11,530,854 km (0.027 R)
• M32: 12,907,603 km (0.1 R)
• M33: 13,087,869 km (0.064 R)
• M34: 13,160,274 km (0.076 R)
• M35: 13,670,403 km (0.085 R)
• M36: 13,891,060 km (0.096 R)
• M37: 14,298,564 km (0.079 R)
• M38: 15,353,678 km (0.1 R)
• M39: 15,429,973 km (0.089 R)
• M40: 15,851,989 km (0.116 R)
• M41: 16,433,625 km (0.113 R)
• M42: 16,589,955 km (0.062 R)
• M43: 16,746,734 km (0.109 R)
• M44: 17,378,785 km (0.098 R)
• M45: 17,817,854 km (0.1 R)
• M46: 17,898,188 km (0.112 R)
• M47: 18,544,302 km (0.116 R)
• M48: 19,075,075 km (0.102 R)
• M49: 19,404,041 km (0.119 R)
• M50: 19,610,635 km (0.109 R)
• M51: 19,901,154 km (0.099 R)
• M52: 20,781,239 km (0.056 R)
• M53: 20,865,612 km (0.096 R)
• M54: 20,950,284 km (0.082 R)
• M55: 21,417,478 km (0.094 R)
• M56: 21,759,609 km (0.081 R)
• M57: 21,888,263 km (0.071 R)
• M58: 22,448,956 km (0.085 R)
• M59: 22,970,753 km (0.049 R)
• M60: 23,233,297 km (0.05 R)
• M61: 23,893,622 km (0.072 R)
• M62: 24,337,330 km (0.109 R)
• M63: 24,560,081 km (0.115 R)
• M64: 24,738,850 km (0.026 R)
• M65: 24,962,948 km (0.119 R)
• M66: 25,548,773 km (0.098 R)
• M67: 26,321,596 km (0.036 R)
• M68: 26,504,554 km (0.103 R)
• M69: 26,687,961 km (0.039 R)
• M70: 27,611,279 km (0.113 R)
• M71: 28,170,326 km (0.114 R)
• M72: 29,157,523 km (0.06 R)
• M73: 29,821,887 km (0.06 R)
• M74: 30,012,774 km (0.111 R)
• M75: 30,395,445 km (0.094 R)
• M76: 30,827,932 km (0.092 R)
• M77: 30,972,594 km (0.102 R)
• M78: 31,214,194 km (0.063 R)
• M79: 32,529,309 km (0.03 R)
• M80: 32,774,799 km (0.055 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.42 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 490.7

Radius: 12.5

Gravity: 3.14 G

Time & Orbit

Eccentricity (e): 0.201

Orbit Range: 4.33 AU - 6.51 AU

Year: 8415 Days

Day: 12.9 Hours

Environment

Temp: -231 °C

Axial Tilt: 7.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 90,347,934 km

• M1: 205,547 km (0.116 R)
• M2: 324,328 km (0.074 R)
• M3: 448,644 km (0.087 R)
• M4: 568,322 km (0.072 R)
• M5: 701,016 km (0.096 R)
• M6: 891,005 km (0.117 R)
• M7: 1,777,821 km (0.104 R)
• M8: 1,939,836 km (0.03 R)
• M9: 2,085,993 km (0.037 R)
• M10: 2,192,656 km (0.091 R)
• M11: 2,301,114 km (0.083 R)
• M12: 2,456,247 km (0.111 R)
• M13: 2,546,455 km (0.05 R)
• M14: 2,942,590 km (0.108 R)
• M15: 3,209,323 km (0.029 R)
• M16: 3,433,720 km (0.098 R)
• M17: 3,845,413 km (0.045 R)
• M18: 3,977,359 km (0.038 R)
• M19: 4,110,800 km (0.095 R)
• M20: 4,409,696 km (0.107 R)
• M21: 4,575,750 km (0.097 R)
• M22: 4,687,649 km (0.086 R)
• M23: 4,971,586 km (0.108 R)
• M24: 5,144,521 km (0.103 R)
• M25: 5,796,020 km (0.077 R)
• M26: 6,008,898 km (0.095 R)
• M27: 6,100,900 km (0.071 R)
• M28: 6,662,940 km (0.109 R)
• M29: 7,079,270 km (0.075 R)
• M30: 7,339,720 km (0.105 R)
• M31: 7,636,523 km (0.039 R)
• M32: 8,758,507 km (0.052 R)
• M33: 9,214,630 km (0.101 R)
• M34: 9,427,807 km (0.095 R)
• M35: 9,931,503 km (0.115 R)
• M36: 10,740,828 km (0.11 R)
• M37: 11,228,966 km (0.104 R)
• M38: 11,342,810 km (0.08 R)
• M39: 12,974,623 km (0.115 R)
• M40: 13,777,365 km (0.117 R)
• M41: 14,062,050 km (0.118 R)
• M42: 14,307,690 km (0.057 R)
• M43: 14,969,810 km (0.102 R)
• M44: 15,136,911 km (0.081 R)
• M45: 16,366,605 km (0.087 R)
• M46: 17,893,401 km (0.062 R)
• M47: 18,026,394 km (0.025 R)
• M48: 18,159,686 km (0.095 R)
• M49: 18,966,467 km (0.056 R)
• M50: 19,556,331 km (0.099 R)
• M51: 19,693,363 km (0.093 R)
• M52: 20,336,933 km (0.115 R)
• M53: 20,522,135 km (0.115 R)
• M54: 21,691,990 km (0.049 R)
• M55: 21,928,505 km (0.113 R)
• M56: 22,118,494 km (0.029 R)
• M57: 23,124,240 km (0.095 R)
• M58: 23,462,930 km (0.12 R)
• M59: 23,949,422 km (0.068 R)
• M60: 24,883,063 km (0.087 R)
• M61: 25,031,613 km (0.081 R)
• M62: 25,329,612 km (0.043 R)
• M63: 26,583,542 km (0.059 R)
• M64: 27,090,828 km (0.119 R)
• M65: 27,498,931 km (0.109 R)
• M66: 27,755,043 km (0.062 R)
• M67: 28,269,510 km (0.04 R)
• M68: 28,995,358 km (0.086 R)
• M69: 29,099,479 km (0.071 R)
• M70: 29,203,748 km (0.116 R)
• M71: 30,095,352 km (0.062 R)
• M72: 30,359,242 km (0.083 R)
• M73: 31,905,336 km (0.096 R)
• M74: 32,120,608 km (0.03 R)
• M75: 32,552,497 km (0.101 R)
• M76: 34,299,501 km (0.068 R)
• M77: 34,796,465 km (0.084 R)
• M78: 35,741,325 km (0.068 R)
• M79: 36,132,972 km (0.095 R)
• M80: 36,525,966 km (0.03 R)
• M81: 36,638,463 km (0.092 R)
• M82: 36,863,907 km (0.102 R)
• M83: 37,202,896 km (0.064 R)
• M84: 38,226,146 km (0.073 R)

Planet 6 - Ice Giant

Semi-Major Axis: 10.73 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 835

Radius: 3.7

Gravity: 60.99 G

Time & Orbit

Eccentricity (e): 0.076

Orbit Range: 9.91 AU - 11.55 AU

Year: 23438 Days

Day: 22.9 Hours

Environment

Temp: -227 °C

Axial Tilt: 23.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 90,347,934 km

• M1: 282,441 km (0.109 R)
• M2: 320,887 km (0.086 R)
• M3: 1,307,336 km (0.098 R)
• M4: 1,406,519 km (0.115 R)
• M5: 1,647,222 km (0.1 R)
• M6: 3,430,728 km (0.041 R)
• M7: 3,476,206 km (0.059 R)
• M8: 3,799,786 km (0.116 R)
• M9: 4,084,770 km (0.118 R)
• M10: 4,376,785 km (0.062 R)
• M11: 4,475,519 km (0.1 R)
• M12: 4,675,382 km (0.119 R)
• M13: 5,083,635 km (0.12 R)
• M14: 5,556,514 km (0.031 R)
• M15: 6,153,409 km (0.08 R)
• M16: 6,770,500 km (0.091 R)
• M17: 6,999,684 km (0.076 R)
• M18: 7,583,864 km (0.07 R)
• M19: 8,985,596 km (0.085 R)
• M20: 10,597,064 km (0.077 R)
• M21: 11,131,129 km (0.11 R)
• M22: 11,948,681 km (0.119 R)
• M23: 12,086,910 km (0.116 R)
• M24: 12,434,575 km (0.094 R)
• M25: 13,497,019 km (0.107 R)
• M26: 13,930,255 km (0.116 R)
• M27: 14,735,989 km (0.118 R)
• M28: 14,958,441 km (0.109 R)
• M29: 16,469,080 km (0.057 R)
• M30: 16,545,824 km (0.079 R)
• M31: 16,699,910 km (0.109 R)
• M32: 16,931,637 km (0.105 R)
• M33: 17,948,603 km (0.072 R)
• M34: 18,106,728 km (0.096 R)
• M35: 18,344,888 km (0.089 R)
• M36: 19,307,849 km (0.043 R)
• M37: 21,282,541 km (0.075 R)
• M38: 21,617,940 km (0.038 R)
• M39: 22,890,868 km (0.035 R)
• M40: 23,493,149 km (0.065 R)
• M41: 24,713,269 km (0.087 R)
• M42: 26,401,780 km (0.101 R)
• M43: 26,762,012 km (0.062 R)
• M44: 27,578,367 km (0.091 R)
• M45: 27,669,622 km (0.1 R)
• M46: 33,907,255 km (0.053 R)
• M47: 34,888,617 km (0.114 R)
• M48: 35,481,922 km (0.089 R)
• M49: 37,483,691 km (0.098 R)
• M50: 38,702,316 km (0.039 R)
• M51: 42,434,932 km (0.063 R)
• M52: 42,645,715 km (0.097 R)
• M53: 42,962,414 km (0.097 R)
• M54: 43,068,180 km (0.081 R)
• M55: 44,986,324 km (0.109 R)
• M56: 46,064,027 km (0.113 R)
• M57: 49,569,254 km (0.081 R)
• M58: 49,902,259 km (0.074 R)
• M59: 51,690,702 km (0.114 R)
• M60: 52,592,777 km (0.091 R)
• M61: 53,500,088 km (0.065 R)
• M62: 53,955,614 km (0.063 R)
• M63: 54,412,486 km (0.12 R)
• M64: 55,330,119 km (0.119 R)
• M65: 56,948,020 km (0.109 R)
• M66: 58,816,198 km (0.101 R)
• M67: 60,112,164 km (0.094 R)
• M68: 60,230,347 km (0.118 R)
• M69: 62,612,244 km (0.082 R)
• M70: 62,852,049 km (0.082 R)
• M71: 63,332,707 km (0.108 R)
• M72: 63,573,560 km (0.106 R)
• M73: 64,176,739 km (0.089 R)
• M74: 65,389,080 km (0.062 R)
• M75: 65,632,475 km (0.077 R)
• M76: 66,120,015 km (0.045 R)
• M77: 67,344,473 km (0.064 R)
• M78: 68,082,589 km (0.099 R)
• M79: 68,823,398 km (0.101 R)
• M80: 72,567,683 km (0.08 R)
• M81: 73,577,170 km (0.111 R)
• M82: 74,464,435 km (0.086 R)
• M83: 75,227,683 km (0.12 R)
• M84: 75,355,140 km (0.049 R)
• M85: 75,610,205 km (0.118 R)
• M86: 77,532,986 km (0.119 R)
• M87: 80,512,228 km (0.045 R)
• M88: 81,295,522 km (0.087 R)
• M89: 81,426,271 km (0.083 R)
• M90: 81,819,115 km (0.199 R)
• M91: 83,528,719 km (0.057 R)
• M92: 83,660,664 km (0.114 R)
• M93: 84,719,069 km (0.091 R)
• M94: 85,515,828 km (0.113 R)
• M95: 88,727,395 km (0.028 R)
• M96: 88,996,820 km (0.049 R)
• M97: 89,266,545 km (0.216 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: 256 - 18,202 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit