🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 521.2

Radius: 13

Gravity: 3.08 G

Time & Orbit

Eccentricity (e): 0.246

Orbit Range: 0.58 AU - 0.96 AU

Year: 430 Days

Day: 10.8 Hours

Environment

Temp: -145 °C

Axial Tilt: 27.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (35)

Outer Limit: 42,942,751 km

• M1: 173,234 km (0.097 R)
• M2: 268,528 km (0.092 R)
• M3: 378,034 km (0.118 R)
• M4: 479,312 km (0.093 R)
• M5: 575,952 km (0.106 R)
• M6: 662,719 km (0.088 R)
• M7: 781,499 km (0.039 R)
• M8: 863,778 km (0.058 R)
• M9: 945,459 km (0.085 R)
• M10: 1,117,346 km (0.091 R)
• M11: 1,262,756 km (0.114 R)
• M12: 1,386,024 km (0.047 R)
• M13: 1,498,522 km (0.069 R)
• M14: 1,634,656 km (0.092 R)
• M15: 1,748,949 km (0.107 R)
• M16: 1,833,771 km (0.082 R)
• M17: 1,931,009 km (0.116 R)
• M18: 2,057,719 km (0.096 R)
• M19: 2,285,107 km (0.078 R)
• M20: 2,473,152 km (0.076 R)
• M21: 2,581,162 km (0.069 R)
• M22: 2,870,933 km (0.119 R)
• M23: 3,029,506 km (0.115 R)
• M24: 3,113,132 km (0.109 R)
• M25: 3,223,685 km (0.119 R)
• M26: 3,665,447 km (0.081 R)
• M27: 3,748,025 km (0.108 R)
• M28: 3,865,759 km (0.088 R)
• M29: 4,048,567 km (0.113 R)
• M30: 4,141,019 km (0.115 R)
• M31: 4,328,166 km (0.081 R)
• M32: 4,437,372 km (0.11 R)
• M33: 4,554,806 km (0.03 R)
• M34: 4,860,884 km (0.103 R)
• M35: 5,189,101 km (0.05 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.07 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 586.3

Radius: 8.4

Gravity: 8.31 G

Time & Orbit

Eccentricity (e): 0.195

Orbit Range: 0.86 AU - 1.28 AU

Year: 704 Days

Day: 12.4 Hours

Environment

Temp: -152 °C

Axial Tilt: 23 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 42,942,751 km

• M1: 132,993 km (0.098 R)
• M2: 321,486 km (0.116 R)
• M3: 402,867 km (0.116 R)
• M4: 463,155 km (0.11 R)
• M5: 598,840 km (0.092 R)
• M6: 679,174 km (0.091 R)
• M7: 778,657 km (0.076 R)
• M8: 1,015,470 km (0.115 R)
• M9: 1,072,617 km (0.093 R)
• M10: 1,214,136 km (0.059 R)
• M11: 1,368,222 km (0.084 R)
• M12: 1,425,369 km (0.07 R)
• M13: 1,826,889 km (0.11 R)
• M14: 1,918,443 km (0.091 R)
• M15: 2,150,469 km (0.094 R)
• M16: 2,209,860 km (0.089 R)
• M17: 2,368,583 km (0.074 R)
• M18: 2,499,930 km (0.106 R)
• M19: 2,601,956 km (0.115 R)
• M20: 2,785,812 km (0.096 R)
• M21: 3,074,087 km (0.108 R)
• M22: 3,260,186 km (0.096 R)
• M23: 3,415,170 km (0.085 R)
• M24: 3,831,501 km (0.105 R)
• M25: 4,022,836 km (0.11 R)
• M26: 4,105,714 km (0.07 R)
• M27: 4,254,563 km (0.074 R)
• M28: 4,329,662 km (0.1 R)
• M29: 4,490,778 km (0.108 R)
• M30: 4,548,074 km (0.088 R)
• M31: 4,926,856 km (0.086 R)
• M32: 4,995,821 km (0.102 R)
• M33: 5,285,442 km (0.046 R)
• M34: 5,356,202 km (0.119 R)
• M35: 5,427,112 km (0.118 R)
• M36: 5,529,137 km (0.042 R)
• M37: 5,891,314 km (0.091 R)
• M38: 5,985,710 km (0.08 R)
• M39: 6,048,990 km (0.077 R)
• M40: 6,122,891 km (0.117 R)
• M41: 6,175,998 km (0.094 R)
• M42: 6,261,269 km (0.055 R)
• M43: 6,573,480 km (0.12 R)
• M44: 6,979,189 km (0.034 R)
• M45: 7,101,411 km (0.075 R)
• M46: 7,190,721 km (0.058 R)
• M47: 7,269,110 km (0.085 R)
• M48: 7,506,223 km (0.062 R)
• M49: 7,631,436 km (0.107 R)
• M50: 7,688,583 km (0.07 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 373.8

Radius: 11.3

Gravity: 2.93 G

Time & Orbit

Eccentricity (e): 0.096

Orbit Range: 1.02 AU - 1.24 AU

Year: 764 Days

Day: 13.7 Hours

Environment

Temp: -161 °C

Axial Tilt: 20.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (52)

Outer Limit: 42,942,751 km

• M1: 141,669 km (0.077 R)
• M2: 255,064 km (0.038 R)
• M3: 336,446 km (0.065 R)
• M4: 417,079 km (0.119 R)
• M5: 522,097 km (0.07 R)
• M6: 595,250 km (0.084 R)
• M7: 690,394 km (0.099 R)
• M8: 834,307 km (0.097 R)
• M9: 953,088 km (0.112 R)
• M10: 1,025,194 km (0.101 R)
• M11: 1,186,461 km (0.07 R)
• M12: 1,683,275 km (0.096 R)
• M13: 1,759,271 km (0.083 R)
• M14: 1,849,628 km (0.075 R)
• M15: 2,008,052 km (0.036 R)
• M16: 2,095,866 km (0.065 R)
• M17: 2,226,615 km (0.078 R)
• M18: 2,310,539 km (0.113 R)
• M19: 2,402,841 km (0.092 R)
• M20: 2,583,705 km (0.112 R)
• M21: 2,731,807 km (0.062 R)
• M22: 2,822,014 km (0.113 R)
• M23: 2,974,604 km (0.116 R)
• M24: 3,122,257 km (0.064 R)
• M25: 3,248,368 km (0.089 R)
• M26: 3,328,104 km (0.109 R)
• M27: 3,604,261 km (0.117 R)
• M28: 3,703,594 km (0.116 R)
• M29: 3,854,240 km (0.085 R)
• M30: 3,964,344 km (0.11 R)
• M31: 4,127,106 km (0.056 R)
• M32: 4,327,268 km (0.096 R)
• M33: 4,450,686 km (0.099 R)
• M34: 4,539,547 km (0.034 R)
• M35: 4,637,983 km (0.116 R)
• M36: 4,755,268 km (0.078 R)
• M37: 4,837,098 km (0.078 R)
• M38: 5,131,656 km (0.091 R)
• M39: 5,225,005 km (0.112 R)
• M40: 5,299,953 km (0.076 R)
• M41: 5,451,197 km (0.099 R)
• M42: 5,603,787 km (0.111 R)
• M43: 5,748,298 km (0.105 R)
• M44: 5,825,790 km (0.095 R)
• M45: 5,981,820 km (0.087 R)
• M46: 6,188,864 km (0.073 R)
• M47: 6,268,450 km (0.06 R)
• M48: 6,378,255 km (0.046 R)
• M49: 6,539,222 km (0.091 R)
• M50: 6,701,536 km (0.095 R)
• M51: 6,814,033 km (0.078 R)
• M52: 6,896,163 km (0.065 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.38 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 68.7

Radius: 8.2

Gravity: 1.02 G

Time & Orbit

Eccentricity (e): 0.246

Orbit Range: 1.79 AU - 2.97 AU

Year: 2335 Days

Day: 6.5 Hours

Environment

Temp: -200 °C

Axial Tilt: 35.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 42,942,751 km

• M1: 112,946 km (0.069 R)
• M2: 178,919 km (0.083 R)
• M3: 316,100 km (0.077 R)
• M4: 377,735 km (0.097 R)
• M5: 435,779 km (0.081 R)
• M6: 539,001 km (0.081 R)
• M7: 596,297 km (0.115 R)
• M8: 749,635 km (0.048 R)
• M9: 809,175 km (0.095 R)
• M10: 1,010,085 km (0.063 R)
• M11: 1,095,056 km (0.062 R)
• M12: 1,163,423 km (0.11 R)
• M13: 1,233,434 km (0.083 R)
• M14: 1,344,436 km (0.102 R)
• M15: 1,418,188 km (0.097 R)
• M16: 1,597,855 km (0.119 R)
• M17: 1,979,329 km (0.066 R)
• M18: 2,040,515 km (0.085 R)
• M19: 2,157,052 km (0.061 R)
• M20: 2,454,003 km (0.097 R)
• M21: 2,653,717 km (0.082 R)
• M22: 3,266,021 km (0.114 R)
• M23: 3,606,954 km (0.077 R)
• M24: 3,720,050 km (0.1 R)
• M25: 3,786,472 km (0.101 R)
• M26: 3,863,066 km (0.108 R)
• M27: 4,503,644 km (0.119 R)
• M28: 4,615,244 km (0.104 R)
• M29: 4,686,901 km (0.056 R)
• M30: 4,789,675 km (0.111 R)
• M31: 4,851,758 km (0.107 R)
• M32: 5,029,181 km (0.114 R)
• M33: 5,134,498 km (0.093 R)
• M34: 5,530,783 km (0.106 R)
• M35: 5,585,087 km (0.103 R)
• M36: 5,727,055 km (0.057 R)
• M37: 6,003,662 km (0.1 R)
• M38: 6,182,880 km (0.101 R)
• M39: 6,295,826 km (0.119 R)
• M40: 6,409,521 km (0.088 R)
• M41: 6,500,925 km (0.107 R)
• M42: 6,836,024 km (0.102 R)
• M43: 6,964,529 km (0.119 R)
• M44: 7,212,263 km (0.119 R)
• M45: 7,390,883 km (0.056 R)
• M46: 7,619,319 km (0.107 R)
• M47: 7,728,376 km (0.048 R)
• M48: 7,837,881 km (0.112 R)
• M49: 7,935,718 km (0.073 R)
• M50: 8,120,322 km (0.077 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.79 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 69.8

Radius: 11.3

Gravity: 0.55 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 2.57 AU - 3.01 AU

Year: 2963 Days

Day: 13 Hours

Environment

Temp: -210 °C

Axial Tilt: 24.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 42,942,751 km

• M1: 140,772 km (0.09 R)
• M2: 234,121 km (0.081 R)
• M3: 346,020 km (0.116 R)
• M4: 460,163 km (0.099 R)
• M5: 589,715 km (0.093 R)
• M6: 739,163 km (0.056 R)
• M7: 864,825 km (0.077 R)
• M8: 952,938 km (0.085 R)
• M9: 1,077,853 km (0.029 R)
• M10: 1,215,632 km (0.117 R)
• M11: 1,301,202 km (0.092 R)
• M12: 1,471,145 km (0.111 R)
• M13: 1,656,796 km (0.042 R)
• M14: 1,801,009 km (0.077 R)
• M15: 1,983,369 km (0.097 R)
• M16: 2,076,867 km (0.048 R)
• M17: 2,502,324 km (0.075 R)
• M18: 2,641,001 km (0.084 R)
• M19: 2,763,222 km (0.112 R)
• M20: 2,896,963 km (0.037 R)
• M21: 3,062,418 km (0.081 R)
• M22: 3,301,475 km (0.11 R)
• M23: 3,567,311 km (0.113 R)
• M24: 3,872,191 km (0.106 R)
• M25: 4,262,642 km (0.107 R)
• M26: 4,406,704 km (0.093 R)
• M27: 4,608,961 km (0.094 R)
• M28: 4,756,913 km (0.091 R)
• M29: 4,871,804 km (0.102 R)
• M30: 4,964,555 km (0.096 R)
• M31: 5,116,247 km (0.088 R)
• M32: 5,234,130 km (0.103 R)
• M33: 5,460,472 km (0.056 R)
• M34: 5,556,663 km (0.043 R)
• M35: 5,799,909 km (0.082 R)
• M36: 6,121,395 km (0.064 R)
• M37: 6,309,589 km (0.081 R)
• M38: 6,410,718 km (0.079 R)
• M39: 6,512,295 km (0.1 R)
• M40: 7,002,676 km (0.091 R)
• M41: 7,133,724 km (0.039 R)
• M42: 7,451,620 km (0.078 R)
• M43: 7,545,118 km (0.112 R)
• M44: 7,760,539 km (0.101 R)
• M45: 7,923,451 km (0.11 R)
• M46: 8,019,044 km (0.108 R)
• M47: 8,307,918 km (0.102 R)
• M48: 8,558,345 km (0.11 R)
• M49: 8,656,481 km (0.093 R)
• M50: 8,967,196 km (0.031 R)
• M51: 9,081,040 km (0.108 R)
• M52: 9,339,096 km (0.036 R)
• M53: 9,454,585 km (0.083 R)
• M54: 9,745,254 km (0.066 R)
• M55: 9,891,710 km (0.118 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.81 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 993.4

Radius: 4.8

Gravity: 43.12 G

Time & Orbit

Eccentricity (e): 0.173

Orbit Range: 7.29 AU - 10.33 AU

Year: 16626 Days

Day: 16.2 Hours

Environment

Temp: -235 °C

Axial Tilt: 39.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 42,942,751 km

• M1: 104,270 km (0.048 R)
• M2: 397,182 km (0.094 R)
• M3: 988,094 km (0.052 R)
• M4: 1,781,262 km (0.072 R)
• M5: 2,012,091 km (0.094 R)
• M6: 2,835,478 km (0.117 R)
• M7: 4,391,745 km (0.077 R)
• M8: 4,568,569 km (0.113 R)
• M9: 5,677,538 km (0.1 R)
• M10: 5,821,751 km (0.104 R)
• M11: 5,918,690 km (0.087 R)
• M12: 6,016,078 km (0.12 R)
• M13: 6,261,868 km (0.08 R)
• M14: 6,460,833 km (0.083 R)
• M15: 6,611,328 km (0.104 R)
• M16: 6,814,033 km (0.097 R)
• M17: 7,018,683 km (0.051 R)
• M18: 7,381,757 km (0.11 R)
• M19: 8,452,280 km (0.045 R)
• M20: 9,117,541 km (0.117 R)
• M21: 11,332,637 km (0.106 R)
• M22: 11,696,908 km (0.086 R)
• M23: 11,880,614 km (0.105 R)
• M24: 13,703,763 km (0.092 R)
• M25: 13,832,717 km (0.092 R)
• M26: 14,221,821 km (0.089 R)
• M27: 14,812,284 km (0.093 R)
• M28: 15,077,371 km (0.114 R)
• M29: 15,277,084 km (0.032 R)
• M30: 16,289,114 km (0.076 R)
• M31: 16,357,480 km (0.113 R)
• M32: 16,768,874 km (0.072 R)
• M33: 16,906,803 km (0.091 R)
• M34: 18,235,532 km (0.028 R)
• M35: 18,306,291 km (0.047 R)
• M36: 18,590,677 km (0.06 R)
• M37: 19,380,255 km (0.091 R)
• M38: 19,670,026 km (0.112 R)
• M39: 21,513,520 km (0.076 R)
• M40: 23,411,468 km (0.092 R)
• M41: 23,488,511 km (0.104 R)
• M42: 23,720,089 km (0.025 R)
• M43: 24,263,279 km (0.113 R)
• M44: 25,362,225 km (0.083 R)
• M45: 25,679,222 km (0.113 R)
• M46: 27,121,496 km (0.111 R)
• M47: 27,771,050 km (0.113 R)
• M48: 28,507,819 km (0.083 R)
• M49: 29,251,021 km (0.109 R)
• M50: 29,416,925 km (0.072 R)
• M51: 29,916,881 km (0.118 R)
• M52: 30,756,425 km (0.105 R)
• M53: 31,009,694 km (0.116 R)
• M54: 31,263,711 km (0.092 R)
• M55: 31,348,533 km (0.097 R)
• M56: 31,859,111 km (0.109 R)
• M57: 34,016,013 km (0.065 R)
• M58: 34,540,652 km (0.032 R)
• M59: 34,891,908 km (0.081 R)
• M60: 34,980,021 km (0.053 R)
• M61: 35,952,856 km (0.103 R)
• M62: 36,219,739 km (0.038 R)
• M63: 36,934,517 km (0.066 R)
• M64: 38,015,512 km (0.087 R)
• M65: 39,106,828 km (0.075 R)
• M66: 40,670,425 km (0.092 R)
• M67: 41,973,423 km (0.106 R)
• M68: 44,333,927 km (0.086 R)
• M69: 45,098,372 km (0.106 R)
• M70: 45,867,156 km (0.117 R)
• M71: 47,320,350 km (0.05 R)
• M72: 47,417,738 km (0.115 R)
• M73: 47,515,126 km (0.082 R)
• M74: 47,808,039 km (0.1 R)
• M75: 48,690,068 km (0.042 R)
• M76: 49,083,809 km (0.095 R)
• M77: 49,281,129 km (0.085 R)
• M78: 49,478,748 km (0.104 R)
• M79: 50,968,593 km (0.058 R)
• M80: 51,368,468 km (0.063 R)
• M81: 51,568,780 km (0.118 R)
• M82: 51,769,390 km (0.111 R)
• M83: 58,635,933 km (0.108 R)
• M84: 58,949,939 km (0.045 R)
• M85: 59,369,561 km (0.099 R)
• M86: 62,228,077 km (0.049 R)
• M87: 62,976,365 km (0.099 R)
• M88: 63,512,823 km (0.12 R)
• M89: 63,835,356 km (0.103 R)
• M90: 67,857,893 km (0.106 R)
• M91: 68,738,426 km (0.105 R)
• M92: 70,288,410 km (0.078 R)
• M93: 70,956,215 km (0.081 R)
• M94: 71,626,114 km (0.086 R)
• M95: 75,233,966 km (0.105 R)
• M96: 75,689,192 km (0.096 R)

Planet 7 - Ice Giant

Semi-Major Axis: 10.6 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 102.3

Radius: 6.6

Gravity: 2.35 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 9.09 AU - 12.11 AU

Year: 21943 Days

Day: 18 Hours

Environment

Temp: -237 °C

Axial Tilt: 24 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 42,942,751 km

• M1: 131,497 km (0.12 R)
• M2: 282,890 km (0.114 R)
• M3: 665,411 km (0.113 R)
• M4: 825,331 km (0.112 R)
• M5: 1,070,074 km (0.111 R)
• M6: 1,457,831 km (0.106 R)
• M7: 1,886,130 km (0.057 R)
• M8: 2,091,079 km (0.097 R)
• M9: 2,448,618 km (0.044 R)
• M10: 2,572,036 km (0.082 R)
• M11: 2,773,844 km (0.12 R)
• M12: 2,850,887 km (0.093 R)
• M13: 3,193,017 km (0.089 R)
• M14: 3,300,877 km (0.034 R)
• M15: 3,575,838 km (0.08 R)
• M16: 4,147,900 km (0.117 R)
• M17: 5,027,236 km (0.097 R)
• M18: 5,184,613 km (0.064 R)
• M19: 5,375,500 km (0.063 R)
• M20: 5,698,931 km (0.067 R)
• M21: 8,207,238 km (0.059 R)
• M22: 9,262,951 km (0.09 R)
• M23: 9,339,993 km (0.093 R)
• M24: 9,728,350 km (0.088 R)
• M25: 9,963,966 km (0.085 R)
• M26: 10,280,964 km (0.078 R)
• M27: 10,400,792 km (0.078 R)
• M28: 10,925,132 km (0.08 R)
• M29: 11,915,470 km (0.06 R)
• M30: 12,041,282 km (0.055 R)
• M31: 12,336,588 km (0.12 R)
• M32: 12,548,868 km (0.077 R)
• M33: 12,762,494 km (0.091 R)
• M34: 12,848,213 km (0.112 R)
• M35: 13,193,335 km (0.064 R)
• M36: 13,716,479 km (0.032 R)
• M37: 14,424,675 km (0.106 R)
• M38: 14,514,135 km (0.119 R)
• M39: 14,873,320 km (0.094 R)
• M40: 15,054,183 km (0.113 R)
• M41: 15,968,825 km (0.083 R)
• M42: 16,200,253 km (0.117 R)
• M43: 16,339,678 km (0.108 R)
• M44: 16,572,901 km (0.097 R)
• M45: 16,666,549 km (0.103 R)
• M46: 16,713,373 km (0.109 R)
• M47: 16,807,321 km (0.089 R)
• M48: 17,899,385 km (0.082 R)
• M49: 17,947,406 km (0.05 R)
• M50: 18,139,789 km (0.112 R)
• M51: 18,526,799 km (0.047 R)
• M52: 18,867,583 km (0.057 R)
• M53: 19,014,338 km (0.111 R)
• M54: 19,210,461 km (0.065 R)
• M55: 19,852,685 km (0.062 R)
• M56: 20,401,709 km (0.1 R)
• M57: 21,208,939 km (0.073 R)
• M58: 21,259,802 km (0.093 R)
• M59: 21,975,329 km (0.096 R)
• M60: 22,181,175 km (0.088 R)
• M61: 22,854,815 km (0.102 R)
• M62: 22,959,084 km (0.068 R)
• M63: 23,482,527 km (0.089 R)
• M64: 24,701,451 km (0.096 R)
• M65: 24,861,969 km (0.095 R)
• M66: 24,969,081 km (0.1 R)
• M67: 25,561,489 km (0.106 R)
• M68: 25,940,720 km (0.062 R)
• M69: 27,587,493 km (0.052 R)
• M70: 28,647,843 km (0.117 R)
• M71: 28,703,942 km (0.059 R)
• M72: 28,929,087 km (0.11 R)
• M73: 29,835,201 km (0.101 R)
• M74: 31,327,440 km (0.091 R)
• M75: 32,550,402 km (0.112 R)
• M76: 34,384,173 km (0.063 R)
• M77: 35,223,118 km (0.092 R)
• M78: 36,008,357 km (0.079 R)
• M79: 38,088,964 km (0.116 R)
• M80: 38,336,250 km (0.085 R)
• M81: 39,081,397 km (0.096 R)
• M82: 39,206,161 km (0.09 R)
• M83: 39,643,436 km (0.069 R)
• M84: 39,706,117 km (0.115 R)
• M85: 40,459,941 km (0.052 R)
• M86: 40,649,182 km (0.036 R)
• M87: 41,472,569 km (0.073 R)
• M88: 41,536,148 km (0.09 R)

Kuiper Belt

Range: 30 - 51 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 270 - 16,280 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit