🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.73 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.39

Radius: 1.42

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.141

Orbit Range: 0.63 AU - 0.83 AU

Year: 224 Days

Day: 17.2 Hours

Environment

Temp: 176 °C

Axial Tilt: 21.1 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 76,119,217 km

• M1: 178,321 km (0.099 R)

Planet 2 - Gas Giant

Semi-Major Axis: 6.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 741.4

Radius: 10.2

Gravity: 7.13 G

Time & Orbit

Eccentricity (e): 0.109

Orbit Range: 5.47 AU - 6.81 AU

Year: 5476 Days

Day: 8.5 Hours

Environment

Temp: -145 °C

Axial Tilt: 72.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 76,119,217 km

• M1: 154,834 km (0.085 R)
• M2: 241,301 km (0.092 R)
• M3: 609,013 km (0.078 R)
• M4: 708,645 km (0.073 R)
• M5: 787,334 km (0.1 R)
• M6: 968,796 km (0.047 R)
• M7: 1,259,165 km (0.047 R)
• M8: 1,473,838 km (0.116 R)
• M9: 1,664,875 km (0.075 R)
• M10: 1,772,436 km (0.074 R)
• M11: 1,976,188 km (0.096 R)
• M12: 2,052,184 km (0.092 R)
• M13: 2,207,167 km (0.078 R)
• M14: 2,286,155 km (0.115 R)
• M15: 2,366,040 km (0.075 R)
• M16: 2,446,972 km (0.092 R)
• M17: 2,549,597 km (0.099 R)
• M18: 3,652,133 km (0.118 R)
• M19: 4,130,248 km (0.085 R)
• M20: 4,884,520 km (0.116 R)
• M21: 4,988,341 km (0.082 R)
• M22: 5,735,433 km (0.101 R)
• M23: 6,038,518 km (0.091 R)
• M24: 6,178,093 km (0.107 R)
• M25: 6,318,715 km (0.054 R)
• M26: 6,431,960 km (0.115 R)
• M27: 6,631,823 km (0.066 R)
• M28: 6,804,758 km (0.089 R)
• M29: 7,511,459 km (0.095 R)
• M30: 7,722,092 km (0.077 R)
• M31: 7,995,707 km (0.059 R)
• M32: 8,334,397 km (0.096 R)
• M33: 8,803,984 km (0.106 R)
• M34: 8,962,408 km (0.117 R)
• M35: 9,089,866 km (0.112 R)
• M36: 10,263,611 km (0.047 R)
• M37: 10,699,240 km (0.107 R)
• M38: 11,278,034 km (0.037 R)
• M39: 11,450,221 km (0.059 R)
• M40: 11,623,306 km (0.036 R)
• M41: 12,077,335 km (0.074 R)
• M42: 12,966,695 km (0.119 R)
• M43: 13,183,312 km (0.111 R)
• M44: 13,401,127 km (0.106 R)
• M45: 14,321,453 km (0.115 R)
• M46: 15,605,601 km (0.094 R)
• M47: 17,440,868 km (0.096 R)
• M48: 17,920,329 km (0.067 R)
• M49: 18,729,055 km (0.089 R)
• M50: 19,014,937 km (0.077 R)
• M51: 19,137,906 km (0.111 R)
• M52: 19,220,035 km (0.103 R)
• M53: 19,508,310 km (0.059 R)
• M54: 19,964,285 km (0.065 R)
• M55: 20,971,527 km (0.064 R)
• M56: 21,481,207 km (0.097 R)
• M57: 21,823,337 km (0.086 R)
• M58: 22,643,134 km (0.116 R)
• M59: 23,078,613 km (0.083 R)
• M60: 24,579,977 km (0.088 R)
• M61: 24,893,086 km (0.114 R)
• M62: 25,976,324 km (0.055 R)
• M63: 26,798,813 km (0.1 R)
• M64: 27,305,651 km (0.093 R)
• M65: 27,676,354 km (0.11 R)
• M66: 27,769,254 km (0.055 R)
• M67: 28,235,401 km (0.081 R)
• M68: 28,563,170 km (0.091 R)
• M69: 28,892,286 km (0.05 R)
• M70: 29,934,833 km (0.118 R)
• M71: 30,652,604 km (0.098 R)
• M72: 31,037,818 km (0.06 R)
• M73: 31,618,557 km (0.072 R)
• M74: 31,715,796 km (0.114 R)
• M75: 31,959,042 km (0.028 R)
• M76: 32,447,479 km (0.025 R)

Planet 3 - Gas Giant

Semi-Major Axis: 6.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 456.1

Radius: 9.6

Gravity: 4.95 G

Time & Orbit

Eccentricity (e): 0.193

Orbit Range: 5.43 AU - 8.03 AU

Year: 6283 Days

Day: 8.3 Hours

Environment

Temp: -149 °C

Axial Tilt: 7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 76,119,217 km

• M1: 159,621 km (0.117 R)
• M2: 286,330 km (0.103 R)
• M3: 364,121 km (0.081 R)
• M4: 503,247 km (0.079 R)
• M5: 638,035 km (0.074 R)
• M6: 772,972 km (0.106 R)
• M7: 1,343,389 km (0.116 R)
• M8: 1,471,145 km (0.087 R)
• M9: 1,721,572 km (0.086 R)
• M10: 2,132,218 km (0.036 R)
• M11: 2,592,830 km (0.102 R)
• M12: 2,692,612 km (0.098 R)
• M13: 2,814,235 km (0.066 R)
• M14: 3,083,960 km (0.071 R)
• M15: 3,581,523 km (0.066 R)
• M16: 3,693,123 km (0.118 R)
• M17: 3,919,763 km (0.107 R)
• M18: 4,244,690 km (0.106 R)
• M19: 4,602,678 km (0.069 R)
• M20: 4,773,070 km (0.109 R)
• M21: 5,120,137 km (0.076 R)
• M22: 5,501,162 km (0.05 R)
• M23: 5,786,446 km (0.11 R)
• M24: 5,970,451 km (0.105 R)
• M25: 6,561,512 km (0.115 R)
• M26: 6,671,018 km (0.078 R)
• M27: 6,753,596 km (0.111 R)
• M28: 6,975,300 km (0.113 R)
• M29: 7,171,273 km (0.069 R)
• M30: 7,340,768 km (0.073 R)
• M31: 7,511,608 km (0.097 R)
• M32: 8,031,910 km (0.084 R)
• M33: 8,266,928 km (0.061 R)
• M34: 8,474,420 km (0.117 R)
• M35: 8,773,915 km (0.049 R)
• M36: 8,864,422 km (0.086 R)
• M37: 9,321,743 km (0.096 R)
• M38: 9,568,729 km (0.065 R)
• M39: 9,880,640 km (0.067 R)
• M40: 10,259,272 km (0.111 R)
• M41: 11,128,586 km (0.05 R)
• M42: 11,226,572 km (0.119 R)
• M43: 11,654,871 km (0.113 R)
• M44: 12,290,363 km (0.098 R)
• M45: 12,765,785 km (0.116 R)
• M46: 12,937,074 km (0.073 R)
• M47: 13,040,147 km (0.093 R)
• M48: 13,420,724 km (0.094 R)
• M49: 14,051,279 km (0.095 R)
• M50: 14,121,889 km (0.112 R)
• M51: 14,228,104 km (0.077 R)
• M52: 14,334,618 km (0.106 R)
• M53: 14,979,085 km (0.109 R)
• M54: 15,413,966 km (0.114 R)
• M55: 16,296,294 km (0.119 R)
• M56: 16,593,994 km (0.077 R)
• M57: 16,743,442 km (0.076 R)
• M58: 16,855,940 km (0.026 R)
• M59: 17,917,636 km (0.086 R)
• M60: 17,994,230 km (0.099 R)
• M61: 18,883,739 km (0.096 R)
• M62: 19,000,874 km (0.12 R)
• M63: 19,196,399 km (0.068 R)
• M64: 20,504,632 km (0.086 R)
• M65: 21,027,776 km (0.104 R)
• M66: 21,230,182 km (0.11 R)
• M67: 21,514,567 km (0.063 R)
• M68: 22,005,248 km (0.062 R)
• M69: 22,664,975 km (0.082 R)
• M70: 23,205,921 km (0.095 R)
• M71: 24,512,957 km (0.045 R)
• M72: 25,325,723 km (0.112 R)
• M73: 25,627,462 km (0.116 R)
• M74: 26,758,571 km (0.111 R)
• M75: 27,639,553 km (0.091 R)
• M76: 27,772,545 km (0.047 R)
• M77: 27,950,268 km (0.083 R)
• M78: 28,172,720 km (0.102 R)
• M79: 28,262,030 km (0.06 R)
• M80: 28,351,340 km (0.099 R)
• M81: 28,888,994 km (0.113 R)
• M82: 29,475,418 km (0.114 R)
• M83: 29,611,253 km (0.072 R)
• M84: 30,020,104 km (0.059 R)
• M85: 30,111,209 km (0.037 R)

Planet 4 - Gas Giant

Semi-Major Axis: 10.19 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 507.7

Radius: 14.9

Gravity: 2.29 G

Time & Orbit

Eccentricity (e): 0.059

Orbit Range: 9.59 AU - 10.79 AU

Year: 11707 Days

Day: 14.5 Hours

Environment

Temp: -169 °C

Axial Tilt: 36.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 76,119,217 km

• M1: 186,848 km (0.12 R)
• M2: 301,141 km (0.11 R)
• M3: 447,298 km (0.099 R)
• M4: 613,351 km (0.11 R)
• M5: 999,164 km (0.113 R)
• M6: 1,416,991 km (0.055 R)
• M7: 1,936,395 km (0.114 R)
• M8: 2,155,705 km (0.065 R)
• M9: 2,281,068 km (0.083 R)
• M10: 2,461,035 km (0.106 R)
• M11: 2,753,648 km (0.03 R)
• M12: 2,973,706 km (0.106 R)
• M13: 3,142,752 km (0.114 R)
• M14: 3,820,281 km (0.085 R)
• M15: 3,942,801 km (0.069 R)
• M16: 4,097,785 km (0.08 R)
• M17: 4,286,577 km (0.045 R)
• M18: 4,607,764 km (0.082 R)
• M19: 4,705,751 km (0.066 R)
• M20: 4,936,879 km (0.054 R)
• M21: 5,514,178 km (0.078 R)
• M22: 6,041,660 km (0.12 R)
• M23: 6,585,298 km (0.043 R)
• M24: 6,696,001 km (0.086 R)
• M25: 7,069,397 km (0.092 R)
• M26: 8,389,748 km (0.115 R)
• M27: 8,630,600 km (0.067 R)
• M28: 8,751,924 km (0.032 R)
• M29: 9,450,247 km (0.1 R)
• M30: 9,659,086 km (0.107 R)
• M31: 10,726,018 km (0.101 R)
• M32: 12,100,972 km (0.093 R)
• M33: 12,740,054 km (0.104 R)
• M34: 13,203,209 km (0.099 R)
• M35: 14,050,980 km (0.052 R)
• M36: 14,146,274 km (0.084 R)
• M37: 14,529,693 km (0.089 R)
• M38: 14,674,354 km (0.11 R)
• M39: 15,111,180 km (0.083 R)
• M40: 16,547,768 km (0.063 R)
• M41: 16,749,426 km (0.087 R)
• M42: 17,410,200 km (0.077 R)
• M43: 17,976,129 km (0.047 R)
• M44: 18,183,322 km (0.029 R)
• M45: 18,757,479 km (0.094 R)
• M46: 20,840,629 km (0.094 R)
• M47: 21,331,759 km (0.112 R)
• M48: 21,606,271 km (0.073 R)
• M49: 21,881,980 km (0.089 R)
• M50: 22,772,087 km (0.085 R)
• M51: 23,334,425 km (0.045 R)
• M52: 24,243,532 km (0.119 R)
• M53: 25,454,526 km (0.065 R)
• M54: 25,862,629 km (0.061 R)
• M55: 26,921,782 km (0.105 R)
• M56: 27,575,974 km (0.109 R)
• M57: 27,755,342 km (0.108 R)
• M58: 28,355,977 km (0.101 R)
• M59: 28,658,015 km (0.074 R)
• M60: 29,082,424 km (0.107 R)
• M61: 29,204,197 km (0.033 R)
• M62: 29,570,114 km (0.107 R)
• M63: 29,937,675 km (0.065 R)
• M64: 30,122,130 km (0.079 R)
• M65: 30,430,152 km (0.111 R)
• M66: 31,173,952 km (0.102 R)
• M67: 31,485,565 km (0.098 R)
• M68: 31,735,543 km (0.073 R)
• M69: 32,237,743 km (0.118 R)
• M70: 34,015,863 km (0.107 R)
• M71: 34,658,535 km (0.093 R)
• M72: 35,890,773 km (0.098 R)
• M73: 37,335,589 km (0.106 R)
• M74: 38,331,612 km (0.099 R)
• M75: 39,808,143 km (0.114 R)
• M76: 40,078,466 km (0.119 R)
• M77: 40,214,002 km (0.086 R)
• M78: 40,825,409 km (0.072 R)
• M79: 41,371,590 km (0.053 R)
• M80: 42,333,056 km (0.103 R)
• M81: 42,540,099 km (0.075 R)
• M82: 43,024,348 km (0.093 R)
• M83: 43,649,816 km (0.051 R)
• M84: 44,628,635 km (0.094 R)
• M85: 45,897,674 km (0.072 R)
• M86: 47,464,861 km (0.102 R)

Planet 5 - Ice Giant

Semi-Major Axis: 13.02 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 968.1

Radius: 6.1

Gravity: 26.02 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 12.2 AU - 13.84 AU

Year: 16908 Days

Day: 15.9 Hours

Environment

Temp: -175 °C

Axial Tilt: 3.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 76,119,217 km

• M1: 120,576 km (0.1 R)
• M2: 230,231 km (0.114 R)
• M3: 553,961 km (0.105 R)
• M4: 1,801,607 km (0.114 R)
• M5: 2,135,061 km (0.115 R)
• M6: 2,415,706 km (0.054 R)
• M7: 2,487,663 km (0.101 R)
• M8: 2,670,771 km (0.08 R)
• M9: 2,745,271 km (0.089 R)
• M10: 2,896,364 km (0.048 R)
• M11: 3,128,091 km (0.058 R)
• M12: 4,200,110 km (0.12 R)
• M13: 4,550,917 km (0.074 R)
• M14: 4,956,925 km (0.109 R)
• M15: 5,002,852 km (0.073 R)
• M16: 5,048,779 km (0.114 R)
• M17: 5,234,130 km (0.062 R)
• M18: 7,154,817 km (0.077 R)
• M19: 7,785,372 km (0.12 R)
• M20: 9,268,037 km (0.068 R)
• M21: 9,324,734 km (0.108 R)
• M22: 9,896,647 km (0.052 R)
• M23: 10,538,871 km (0.113 R)
• M24: 10,954,603 km (0.094 R)
• M25: 11,074,431 km (0.052 R)
• M26: 11,315,284 km (0.118 R)
• M27: 11,557,782 km (0.071 R)
• M28: 11,679,704 km (0.069 R)
• M29: 12,171,732 km (0.091 R)
• M30: 12,357,981 km (0.108 R)
• M31: 13,688,056 km (0.055 R)
• M32: 15,597,972 km (0.099 R)
• M33: 15,665,291 km (0.047 R)
• M34: 16,344,016 km (0.095 R)
• M35: 17,171,143 km (0.12 R)
• M36: 18,082,493 km (0.056 R)
• M37: 19,297,826 km (0.102 R)
• M38: 19,733,006 km (0.109 R)
• M39: 19,805,860 km (0.077 R)
• M40: 19,951,718 km (0.12 R)
• M41: 20,098,175 km (0.056 R)
• M42: 20,465,438 km (0.089 R)
• M43: 20,909,294 km (0.091 R)
• M44: 21,132,345 km (0.11 R)
• M45: 23,483,275 km (0.091 R)
• M46: 23,637,810 km (0.08 R)
• M47: 24,259,240 km (0.12 R)
• M48: 25,043,432 km (0.045 R)
• M49: 28,839,478 km (0.118 R)
• M50: 29,503,243 km (0.077 R)
• M51: 30,255,870 km (0.079 R)
• M52: 31,609,731 km (0.106 R)
• M53: 31,865,693 km (0.033 R)
• M54: 35,256,029 km (0.077 R)
• M55: 35,965,572 km (0.048 R)
• M56: 36,054,583 km (0.064 R)
• M57: 36,590,293 km (0.109 R)
• M58: 36,679,752 km (0.112 R)
• M59: 37,308,512 km (0.097 R)
• M60: 37,669,492 km (0.081 R)
• M61: 38,850,417 km (0.076 R)
• M62: 41,062,222 km (0.091 R)
• M63: 44,838,371 km (0.111 R)
• M64: 44,934,114 km (0.112 R)
• M65: 45,799,538 km (0.11 R)
• M66: 47,351,616 km (0.108 R)
• M67: 47,546,841 km (0.085 R)
• M68: 48,134,162 km (0.05 R)
• M69: 50,109,004 km (0.106 R)
• M70: 53,424,840 km (0.056 R)
• M71: 53,729,870 km (0.085 R)
• M72: 55,160,475 km (0.065 R)
• M73: 56,500,273 km (0.048 R)
• M74: 57,226,122 km (0.092 R)
• M75: 58,791,814 km (0.105 R)
• M76: 59,316,753 km (0.06 R)
• M77: 60,160,036 km (0.09 R)
• M78: 60,901,144 km (0.114 R)
• M79: 61,645,393 km (0.098 R)
• M80: 62,713,671 km (0.091 R)
• M81: 65,628,436 km (0.054 R)
• M82: 65,955,008 km (0.1 R)
• M83: 66,282,179 km (0.116 R)
• M84: 66,828,510 km (0.109 R)
• M85: 67,925,811 km (0.118 R)
• M86: 70,472,116 km (0.09 R)
• M87: 71,365,066 km (0.104 R)
• M88: 72,824,094 km (0.118 R)
• M89: 72,936,741 km (0.103 R)
• M90: 73,840,013 km (0.098 R)
• M91: 75,543,484 km (0.076 R)
• M92: 76,114,200 km (0.053 R)

Planet 6 - Ice Giant

Semi-Major Axis: 13.86 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 795.5

Radius: 4.3

Gravity: 43.02 G

Time & Orbit

Eccentricity (e): 0.017

Orbit Range: 13.62 AU - 14.1 AU

Year: 18570 Days

Day: 20.2 Hours

Environment

Temp: -190 °C

Axial Tilt: 18.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 76,119,217 km

• M1: 60,288 km (0.096 R)
• M2: 237,113 km (0.105 R)
• M3: 284,984 km (0.115 R)
• M4: 468,690 km (0.119 R)
• M5: 661,971 km (0.056 R)
• M6: 1,372,710 km (0.088 R)
• M7: 1,492,538 km (0.105 R)
• M8: 1,678,787 km (0.099 R)
• M9: 2,005,359 km (0.083 R)
• M10: 2,678,550 km (0.107 R)
• M11: 2,753,199 km (0.08 R)
• M12: 3,019,932 km (0.037 R)
• M13: 3,136,768 km (0.104 R)
• M14: 3,455,561 km (0.035 R)
• M15: 3,826,564 km (0.104 R)
• M16: 4,340,582 km (0.074 R)
• M17: 5,244,602 km (0.092 R)
• M18: 5,574,465 km (0.054 R)
• M19: 6,106,136 km (0.043 R)
• M20: 6,402,938 km (0.053 R)
• M21: 6,755,241 km (0.061 R)
• M22: 6,806,105 km (0.089 R)
• M23: 7,373,529 km (0.037 R)
• M24: 7,742,587 km (0.025 R)
• M25: 7,795,844 km (0.028 R)
• M26: 8,063,774 km (0.11 R)
• M27: 8,553,557 km (0.06 R)
• M28: 9,334,458 km (0.111 R)
• M29: 10,079,755 km (0.101 R)
• M30: 10,430,113 km (0.086 R)
• M31: 10,488,905 km (0.076 R)
• M32: 10,725,270 km (0.107 R)
• M33: 10,963,280 km (0.109 R)
• M34: 11,565,860 km (0.1 R)
• M35: 12,365,311 km (0.075 R)
• M36: 12,866,165 km (0.056 R)
• M37: 13,245,994 km (0.101 R)
• M38: 13,629,712 km (0.079 R)
• M39: 14,277,172 km (0.076 R)
• M40: 14,407,771 km (0.058 R)
• M41: 14,670,315 km (0.077 R)
• M42: 14,802,261 km (0.098 R)
• M43: 16,074,590 km (0.089 R)
• M44: 16,415,225 km (0.104 R)
• M45: 17,103,674 km (0.12 R)
• M46: 18,153,851 km (0.047 R)
• M47: 18,865,339 km (0.098 R)
• M48: 20,906,003 km (0.098 R)
• M49: 21,128,754 km (0.071 R)
• M50: 21,651,599 km (0.096 R)
• M51: 23,630,480 km (0.111 R)
• M52: 23,785,014 km (0.097 R)
• M53: 25,270,372 km (0.101 R)
• M54: 25,428,496 km (0.069 R)
• M55: 26,624,681 km (0.057 R)
• M56: 28,084,158 km (0.083 R)
• M57: 28,741,192 km (0.101 R)
• M58: 29,237,109 km (0.105 R)
• M59: 30,826,436 km (0.113 R)
• M60: 31,249,350 km (0.073 R)
• M61: 32,100,861 km (0.099 R)
• M62: 32,186,580 km (0.118 R)
• M63: 32,960,151 km (0.063 R)
• M64: 33,739,705 km (0.035 R)
• M65: 34,001,053 km (0.025 R)
• M66: 34,788,835 km (0.057 R)
• M67: 36,204,031 km (0.056 R)
• M68: 37,367,753 km (0.076 R)
• M69: 37,457,811 km (0.091 R)
• M70: 39,364,885 km (0.095 R)
• M71: 39,915,554 km (0.092 R)
• M72: 40,284,014 km (0.092 R)
• M73: 42,706,751 km (0.028 R)
• M74: 43,367,076 km (0.057 R)
• M75: 45,080,421 km (0.098 R)
• M76: 46,525,087 km (0.074 R)
• M77: 46,912,845 km (0.093 R)
• M78: 48,572,933 km (0.106 R)
• M79: 51,348,871 km (0.059 R)
• M80: 51,850,024 km (0.088 R)
• M81: 51,950,404 km (0.103 R)
• M82: 53,059,223 km (0.073 R)
• M83: 54,379,724 km (0.111 R)
• M84: 55,505,448 km (0.086 R)
• M85: 58,196,564 km (0.082 R)
• M86: 58,300,983 km (0.111 R)
• M87: 58,928,396 km (0.119 R)
• M88: 62,632,739 km (0.05 R)
• M89: 63,812,468 km (0.061 R)
• M90: 68,383,879 km (0.081 R)
• M91: 69,155,954 km (0.111 R)
• M92: 71,042,982 km (0.098 R)
• M93: 71,377,782 km (0.108 R)
• M94: 72,385,174 km (0.092 R)
• M95: 74,754,206 km (0.067 R)

Kuiper Belt

Range: 30.5 - 53.5 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 214 - 19,691 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit