🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.86 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.65

Radius: 1.48

Gravity: 1.21 G

Time & Orbit

Eccentricity (e): 0.151

Orbit Range: 0.73 AU - 0.99 AU

Year: 297 Days

Day: 16.5 Hours

Environment

Temp: 161 °C

Axial Tilt: 26.8 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 2.63 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.08

Radius: 1.57

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.127

Orbit Range: 2.3 AU - 2.96 AU

Year: 1590 Days

Day: 27.6 Hours

Environment

Temp: -102 °C

Axial Tilt: 22.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 2.77 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.41

Radius: 1.42

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.178

Orbit Range: 2.28 AU - 3.26 AU

Year: 1719 Days

Day: 26.3 Hours

Environment

Temp: -107 °C

Axial Tilt: 49.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 3.19 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.07

Radius: 1.34

Gravity: 1.15 G

Time & Orbit

Eccentricity (e): 0.042

Orbit Range: 3.06 AU - 3.32 AU

Year: 2124 Days

Day: 14.1 Hours

Environment

Temp: -106 °C

Axial Tilt: 33.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 4.47 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.16

Radius: 0.48

Gravity: 0.69 G

Time & Orbit

Eccentricity (e): 0.139

Orbit Range: 3.85 AU - 5.09 AU

Year: 3523 Days

Day: 39 Hours

Environment

Temp: -133 °C

Axial Tilt: 8.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 4.95 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 976.5

Radius: 9

Gravity: 12.06 G

Time & Orbit

Eccentricity (e): 0.246

Orbit Range: 3.73 AU - 6.17 AU

Year: 4105 Days

Day: 11.6 Hours

Environment

Temp: -151 °C

Axial Tilt: 33.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 58,879,731 km

• M1: 331,808 km (0.099 R)
• M2: 603,927 km (0.099 R)
• M3: 709,543 km (0.112 R)
• M4: 834,607 km (0.086 R)
• M5: 900,130 km (0.058 R)
• M6: 1,079,049 km (0.12 R)
• M7: 1,136,495 km (0.114 R)
• M8: 1,315,264 km (0.043 R)
• M9: 1,785,151 km (0.074 R)
• M10: 1,994,140 km (0.09 R)
• M11: 2,101,700 km (0.078 R)
• M12: 2,248,157 km (0.069 R)
• M13: 2,322,657 km (0.103 R)
• M14: 2,416,903 km (0.039 R)
• M15: 2,551,242 km (0.047 R)
• M16: 2,629,033 km (0.103 R)
• M17: 2,867,342 km (0.083 R)
• M18: 3,407,989 km (0.105 R)
• M19: 3,778,393 km (0.082 R)
• M20: 3,912,284 km (0.077 R)
• M21: 4,116,036 km (0.07 R)
• M22: 4,207,739 km (0.099 R)
• M23: 4,346,566 km (0.08 R)
• M24: 4,510,376 km (0.07 R)
• M25: 4,844,428 km (0.079 R)
• M26: 5,816,664 km (0.103 R)
• M27: 5,971,498 km (0.116 R)
• M28: 6,259,025 km (0.112 R)
• M29: 6,524,412 km (0.099 R)
• M30: 7,066,106 km (0.094 R)
• M31: 7,453,864 km (0.092 R)
• M32: 7,763,531 km (0.09 R)
• M33: 8,984,100 km (0.111 R)
• M34: 9,073,560 km (0.119 R)
• M35: 9,434,390 km (0.103 R)
• M36: 9,616,600 km (0.09 R)
• M37: 10,077,212 km (0.099 R)
• M38: 10,263,461 km (0.059 R)
• M39: 10,325,843 km (0.038 R)
• M40: 10,924,385 km (0.119 R)
• M41: 11,599,071 km (0.111 R)
• M42: 11,892,283 km (0.081 R)
• M43: 11,990,569 km (0.108 R)
• M44: 12,287,072 km (0.118 R)
• M45: 12,652,838 km (0.085 R)
• M46: 12,786,728 km (0.052 R)
• M47: 13,225,200 km (0.097 R)
• M48: 13,668,458 km (0.111 R)
• M49: 14,012,833 km (0.034 R)
• M50: 14,151,360 km (0.076 R)
• M51: 14,220,923 km (0.102 R)
• M52: 14,429,911 km (0.089 R)
• M53: 14,956,945 km (0.091 R)
• M54: 15,276,187 km (0.098 R)
• M55: 15,885,199 km (0.1 R)
• M56: 16,029,711 km (0.061 R)
• M57: 16,758,701 km (0.1 R)
• M58: 16,832,304 km (0.086 R)
• M59: 16,942,707 km (0.059 R)
• M60: 17,127,311 km (0.03 R)
• M61: 17,201,362 km (0.114 R)
• M62: 17,498,613 km (0.093 R)
• M63: 17,985,105 km (0.111 R)
• M64: 18,780,517 km (0.068 R)
• M65: 18,856,961 km (0.091 R)
• M66: 18,933,406 km (0.108 R)
• M67: 21,234,969 km (0.106 R)
• M68: 21,994,777 km (0.085 R)
• M69: 22,885,632 km (0.08 R)
• M70: 22,967,163 km (0.116 R)
• M71: 23,130,673 km (0.079 R)
• M72: 24,160,954 km (0.074 R)
• M73: 24,786,273 km (0.087 R)
• M74: 24,996,009 km (0.074 R)
• M75: 25,079,933 km (0.11 R)
• M76: 25,798,003 km (0.077 R)
• M77: 26,565,440 km (0.073 R)
• M78: 26,823,048 km (0.116 R)
• M79: 27,600,508 km (0.088 R)
• M80: 28,736,704 km (0.051 R)
• M81: 29,001,043 km (0.101 R)
• M82: 29,487,835 km (0.072 R)

Planet 7 - Gas Giant

Semi-Major Axis: 8.25 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 57.8

Radius: 8.4

Gravity: 0.82 G

Time & Orbit

Eccentricity (e): 0.094

Orbit Range: 7.47 AU - 9.03 AU

Year: 8834 Days

Day: 6.3 Hours

Environment

Temp: -160 °C

Axial Tilt: 5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (65)

Outer Limit: 58,879,731 km

• M1: 107,561 km (0.08 R)
• M2: 176,077 km (0.089 R)
• M3: 288,275 km (0.089 R)
• M4: 423,512 km (0.117 R)
• M5: 590,014 km (0.107 R)
• M6: 826,079 km (0.06 R)
• M7: 945,010 km (0.079 R)
• M8: 1,234,033 km (0.033 R)
• M9: 1,290,581 km (0.111 R)
• M10: 1,525,898 km (0.091 R)
• M11: 1,623,885 km (0.033 R)
• M12: 1,749,397 km (0.12 R)
• M13: 1,904,381 km (0.092 R)
• M14: 2,214,048 km (0.099 R)
• M15: 2,311,586 km (0.093 R)
• M16: 2,424,682 km (0.118 R)
• M17: 2,627,238 km (0.096 R)
• M18: 2,972,061 km (0.059 R)
• M19: 3,079,771 km (0.049 R)
• M20: 3,204,686 km (0.113 R)
• M21: 3,315,238 km (0.088 R)
• M22: 3,411,131 km (0.051 R)
• M23: 3,687,737 km (0.078 R)
• M24: 3,937,865 km (0.118 R)
• M25: 4,073,550 km (0.111 R)
• M26: 4,542,988 km (0.078 R)
• M27: 4,757,063 km (0.04 R)
• M28: 4,992,829 km (0.087 R)
• M29: 5,047,881 km (0.054 R)
• M30: 5,438,182 km (0.117 R)
• M31: 5,935,146 km (0.104 R)
• M32: 6,012,787 km (0.071 R)
• M33: 6,466,518 km (0.031 R)
• M34: 6,727,715 km (0.087 R)
• M35: 7,054,138 km (0.114 R)
• M36: 7,764,877 km (0.109 R)
• M37: 8,064,073 km (0.111 R)
• M38: 9,163,618 km (0.088 R)
• M39: 9,411,800 km (0.083 R)
• M40: 9,639,339 km (0.033 R)
• M41: 10,123,138 km (0.047 R)
• M42: 10,286,200 km (0.07 R)
• M43: 10,544,107 km (0.117 R)
• M44: 11,042,417 km (0.088 R)
• M45: 11,282,522 km (0.067 R)
• M46: 11,451,567 km (0.118 R)
• M47: 11,597,126 km (0.112 R)
• M48: 12,037,542 km (0.115 R)
• M49: 12,259,845 km (0.098 R)
• M50: 12,583,275 km (0.082 R)
• M51: 13,776,169 km (0.08 R)
• M52: 14,112,465 km (0.089 R)
• M53: 14,190,405 km (0.091 R)
• M54: 14,872,422 km (0.058 R)
• M55: 15,004,666 km (0.109 R)
• M56: 15,084,402 km (0.076 R)
• M57: 15,377,464 km (0.117 R)
• M58: 15,780,182 km (0.092 R)
• M59: 16,104,809 km (0.057 R)
• M60: 16,678,367 km (0.113 R)
• M61: 18,070,675 km (0.098 R)
• M62: 18,666,523 km (0.07 R)
• M63: 18,809,389 km (0.088 R)
• M64: 18,866,685 km (0.113 R)
• M65: 19,124,891 km (0.102 R)

Planet 8 - Gas Giant

Semi-Major Axis: 8.74 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 393

Radius: 8.3

Gravity: 5.7 G

Time & Orbit

Eccentricity (e): 0.158

Orbit Range: 7.36 AU - 10.12 AU

Year: 9632 Days

Day: 13.1 Hours

Environment

Temp: -175 °C

Axial Tilt: 23.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 58,879,731 km

• M1: 113,096 km (0.058 R)
• M2: 238,309 km (0.08 R)
• M3: 294,558 km (0.101 R)
• M4: 1,012,927 km (0.1 R)
• M5: 1,080,396 km (0.081 R)
• M6: 2,110,976 km (0.102 R)
• M7: 2,220,332 km (0.107 R)
• M8: 3,362,661 km (0.068 R)
• M9: 5,874,260 km (0.058 R)
• M10: 5,935,894 km (0.097 R)
• M11: 6,342,501 km (0.07 R)
• M12: 6,757,934 km (0.056 R)
• M13: 6,887,636 km (0.111 R)
• M14: 6,952,711 km (0.06 R)
• M15: 7,018,085 km (0.099 R)
• M16: 7,347,799 km (0.094 R)
• M17: 7,886,052 km (0.092 R)
• M18: 8,263,338 km (0.071 R)
• M19: 8,332,601 km (0.054 R)
• M20: 8,402,015 km (0.106 R)
• M21: 8,646,607 km (0.104 R)
• M22: 8,752,223 km (0.096 R)
• M23: 9,358,394 km (0.082 R)
• M24: 9,539,258 km (0.116 R)
• M25: 9,684,817 km (0.096 R)
• M26: 10,051,930 km (0.042 R)
• M27: 10,423,531 km (0.105 R)
• M28: 10,799,769 km (0.097 R)
• M29: 11,103,902 km (0.101 R)
• M30: 11,642,903 km (0.06 R)
• M31: 12,388,200 km (0.104 R)
• M32: 12,467,487 km (0.101 R)
• M33: 12,626,659 km (0.08 R)
• M34: 12,906,855 km (0.092 R)
• M35: 13,473,532 km (0.111 R)
• M36: 13,924,420 km (0.033 R)
• M37: 14,547,196 km (0.1 R)
• M38: 15,009,753 km (0.1 R)
• M39: 15,221,583 km (0.103 R)
• M40: 16,035,545 km (0.091 R)
• M41: 16,208,780 km (0.086 R)
• M42: 16,951,683 km (0.086 R)
• M43: 17,216,621 km (0.111 R)
• M44: 17,438,325 km (0.06 R)
• M45: 17,705,656 km (0.07 R)
• M46: 19,017,031 km (0.078 R)
• M47: 19,154,511 km (0.096 R)
• M48: 19,707,575 km (0.107 R)
• M49: 19,846,701 km (0.058 R)
• M50: 20,688,189 km (0.119 R)
• M51: 21,684,511 km (0.033 R)
• M52: 21,972,038 km (0.075 R)
• M53: 22,116,250 km (0.095 R)
• M54: 23,920,999 km (0.117 R)
• M55: 24,715,962 km (0.11 R)
• M56: 25,975,426 km (0.065 R)
• M57: 26,433,944 km (0.098 R)
• M58: 27,981,534 km (0.068 R)
• M59: 28,137,863 km (0.119 R)
• M60: 29,877,088 km (0.098 R)
• M61: 30,143,672 km (0.09 R)
• M62: 30,464,559 km (0.108 R)
• M63: 30,840,349 km (0.099 R)
• M64: 31,217,784 km (0.092 R)
• M65: 32,086,051 km (0.06 R)
• M66: 32,304,314 km (0.097 R)
• M67: 32,852,291 km (0.108 R)
• M68: 32,907,343 km (0.116 R)
• M69: 33,292,857 km (0.075 R)
• M70: 33,403,409 km (0.092 R)
• M71: 34,738,271 km (0.117 R)
• M72: 37,058,684 km (0.056 R)
• M73: 37,804,878 km (0.119 R)
• M74: 37,862,473 km (0.054 R)

Planet 9 - Gas Giant

Semi-Major Axis: 8.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 549.2

Radius: 11.6

Gravity: 4.08 G

Time & Orbit

Eccentricity (e): 0.132

Orbit Range: 7.79 AU - 10.15 AU

Year: 10015 Days

Day: 10 Hours

Environment

Temp: -164 °C

Axial Tilt: 32.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 58,879,731 km

• M1: 159,920 km (0.047 R)
• M2: 289,173 km (0.058 R)
• M3: 671,096 km (0.117 R)
• M4: 914,791 km (0.071 R)
• M5: 1,264,700 km (0.098 R)
• M6: 1,343,838 km (0.093 R)
• M7: 1,655,899 km (0.087 R)
• M8: 1,876,855 km (0.087 R)
• M9: 2,323,554 km (0.115 R)
• M10: 2,546,754 km (0.119 R)
• M11: 2,908,183 km (0.113 R)
• M12: 3,176,412 km (0.117 R)
• M13: 3,368,944 km (0.078 R)
• M14: 3,565,516 km (0.116 R)
• M15: 3,940,707 km (0.063 R)
• M16: 4,029,119 km (0.09 R)
• M17: 4,791,470 km (0.113 R)
• M18: 5,764,604 km (0.081 R)
• M19: 5,899,093 km (0.086 R)
• M20: 6,412,214 km (0.118 R)
• M21: 6,656,507 km (0.108 R)
• M22: 7,046,957 km (0.115 R)
• M23: 7,299,179 km (0.098 R)
• M24: 7,517,891 km (0.08 R)
• M25: 8,452,130 km (0.109 R)
• M26: 8,952,385 km (0.115 R)
• M27: 9,225,850 km (0.108 R)
• M28: 9,941,526 km (0.056 R)
• M29: 10,634,015 km (0.116 R)
• M30: 11,893,629 km (0.08 R)
• M31: 12,891,148 km (0.104 R)
• M32: 13,288,779 km (0.073 R)
• M33: 14,735,091 km (0.025 R)
• M34: 15,150,824 km (0.119 R)
• M35: 15,476,797 km (0.095 R)
• M36: 15,617,270 km (0.082 R)
• M37: 15,711,217 km (0.07 R)
• M38: 15,946,684 km (0.101 R)
• M39: 16,468,930 km (0.111 R)
• M40: 16,852,200 km (0.056 R)
• M41: 17,045,032 km (0.079 R)
• M42: 17,287,081 km (0.036 R)
• M43: 18,365,383 km (0.073 R)
• M44: 18,514,232 km (0.069 R)
• M45: 19,213,603 km (0.109 R)
• M46: 20,638,373 km (0.055 R)
• M47: 22,149,610 km (0.065 R)
• M48: 22,572,823 km (0.063 R)
• M49: 23,105,541 km (0.091 R)
• M50: 23,427,176 km (0.069 R)
• M51: 23,750,308 km (0.087 R)
• M52: 24,183,393 km (0.086 R)
• M53: 24,455,512 km (0.104 R)
• M54: 24,564,569 km (0.073 R)
• M55: 25,553,859 km (0.091 R)
• M56: 25,775,414 km (0.106 R)
• M57: 26,109,017 km (0.06 R)
• M58: 26,612,115 km (0.065 R)
• M59: 26,724,313 km (0.088 R)
• M60: 26,836,661 km (0.083 R)
• M61: 27,571,037 km (0.087 R)
• M62: 27,684,582 km (0.087 R)
• M63: 31,104,240 km (0.072 R)
• M64: 31,697,096 km (0.109 R)
• M65: 32,114,175 km (0.078 R)
• M66: 32,473,060 km (0.087 R)
• M67: 32,893,580 km (0.108 R)
• M68: 33,014,156 km (0.1 R)
• M69: 33,195,169 km (0.109 R)
• M70: 33,315,895 km (0.082 R)
• M71: 33,497,506 km (0.094 R)
• M72: 34,226,946 km (0.088 R)
• M73: 34,900,286 km (0.119 R)
• M74: 35,084,590 km (0.104 R)
• M75: 37,825,971 km (0.05 R)
• M76: 38,015,362 km (0.064 R)
• M77: 38,205,052 km (0.08 R)
• M78: 38,395,042 km (0.058 R)
• M79: 38,967,104 km (0.115 R)
• M80: 39,286,046 km (0.087 R)
• M81: 40,441,690 km (0.104 R)
• M82: 42,786,188 km (0.098 R)
• M83: 43,643,683 km (0.045 R)
• M84: 44,174,157 km (0.119 R)
• M85: 44,307,149 km (0.06 R)

Planet 10 - Gas Giant

Semi-Major Axis: 10.24 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 850.9

Radius: 13.8

Gravity: 4.47 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 8.07 AU - 12.41 AU

Year: 12215 Days

Day: 11.8 Hours

Environment

Temp: -172 °C

Axial Tilt: 2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 58,879,731 km

• M1: 325,375 km (0.07 R)
• M2: 1,167,013 km (0.097 R)
• M3: 1,258,866 km (0.095 R)
• M4: 1,377,497 km (0.091 R)
• M5: 1,626,428 km (0.07 R)
• M6: 2,255,337 km (0.065 R)
• M7: 3,413,075 km (0.061 R)
• M8: 3,616,379 km (0.06 R)
• M9: 3,964,194 km (0.071 R)
• M10: 4,506,337 km (0.108 R)
• M11: 4,655,037 km (0.113 R)
• M12: 4,805,233 km (0.118 R)
• M13: 4,995,372 km (0.106 R)
• M14: 6,229,704 km (0.091 R)
• M15: 6,689,718 km (0.118 R)
• M16: 7,291,101 km (0.087 R)
• M17: 7,466,131 km (0.119 R)
• M18: 8,362,371 km (0.082 R)
• M19: 8,591,855 km (0.103 R)
• M20: 9,151,051 km (0.089 R)
• M21: 9,339,993 km (0.029 R)
• M22: 12,275,852 km (0.116 R)
• M23: 12,958,467 km (0.114 R)
• M24: 13,117,639 km (0.08 R)
• M25: 13,653,349 km (0.101 R)
• M26: 14,032,579 km (0.096 R)
• M27: 14,968,015 km (0.06 R)
• M28: 15,584,209 km (0.117 R)
• M29: 15,866,949 km (0.056 R)
• M30: 17,658,084 km (0.103 R)
• M31: 18,428,064 km (0.095 R)
• M32: 19,088,240 km (0.117 R)
• M33: 19,451,613 km (0.073 R)
• M34: 19,695,158 km (0.099 R)
• M35: 20,431,928 km (0.102 R)
• M36: 21,932,245 km (0.116 R)
• M37: 22,504,157 km (0.117 R)
• M38: 23,662,494 km (0.089 R)
• M39: 23,922,495 km (0.081 R)
• M40: 24,445,339 km (0.063 R)
• M41: 24,774,155 km (0.083 R)
• M42: 24,906,101 km (0.041 R)
• M43: 25,502,547 km (0.105 R)
• M44: 25,836,001 km (0.081 R)
• M45: 26,036,761 km (0.097 R)
• M46: 26,709,802 km (0.051 R)
• M47: 26,912,807 km (0.057 R)
• M48: 28,141,603 km (0.081 R)
• M49: 29,110,100 km (0.108 R)
• M50: 30,724,710 km (0.1 R)
• M51: 30,937,438 km (0.057 R)
• M52: 31,079,556 km (0.107 R)
• M53: 31,293,032 km (0.066 R)
• M54: 31,793,287 km (0.035 R)
• M55: 32,296,236 km (0.107 R)
• M56: 33,309,911 km (0.119 R)
• M57: 35,145,776 km (0.111 R)
• M58: 35,516,928 km (0.041 R)
• M59: 35,665,778 km (0.076 R)
• M60: 36,038,725 km (0.116 R)
• M61: 36,563,066 km (0.051 R)
• M62: 36,713,412 km (0.083 R)
• M63: 36,939,155 km (0.096 R)
• M64: 37,619,377 km (0.063 R)
• M65: 38,532,672 km (0.117 R)
• M66: 38,762,155 km (0.096 R)
• M67: 40,381,252 km (0.092 R)
• M68: 40,769,908 km (0.088 R)
• M69: 41,159,909 km (0.093 R)
• M70: 41,316,239 km (0.083 R)
• M71: 42,179,718 km (0.088 R)
• M72: 43,128,468 km (0.103 R)
• M73: 45,611,792 km (0.095 R)
• M74: 45,773,508 km (0.077 R)
• M75: 46,097,686 km (0.037 R)
• M76: 48,635,913 km (0.081 R)
• M77: 49,464,386 km (0.12 R)
• M78: 51,135,245 km (0.098 R)
• M79: 51,471,691 km (0.099 R)
• M80: 53,590,744 km (0.077 R)
• M81: 55,047,977 km (0.058 R)
• M82: 55,651,754 km (0.117 R)
• M83: 57,127,388 km (0.105 R)
• M84: 57,826,159 km (0.094 R)

Kuiper Belt

Range: 30 - 56 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 307 - 10,877 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit