🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 30.3

Radius: 9.2

Gravity: 0.36 G

Time & Orbit

Eccentricity (e): 0.207

Orbit Range: 0.67 AU - 1.01 AU

Year: 505 Days

Day: 10.9 Hours

Environment

Temp: -147 °C

Axial Tilt: 2.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 67,661,003 km

• M1: 156,928 km (0.115 R)
• M2: 272,867 km (0.099 R)
• M3: 392,994 km (0.115 R)
• M4: 514,916 km (0.06 R)
• M5: 599,887 km (0.102 R)
• M6: 679,773 km (0.091 R)
• M7: 743,950 km (0.109 R)
• M8: 846,574 km (0.083 R)
• M9: 928,105 km (0.053 R)
• M10: 1,014,872 km (0.076 R)
• M11: 1,135,149 km (0.106 R)
• M12: 1,420,581 km (0.109 R)
• M13: 1,521,710 km (0.115 R)
• M14: 1,678,039 km (0.043 R)
• M15: 1,776,325 km (0.093 R)
• M16: 1,888,823 km (0.079 R)
• M17: 2,073,127 km (0.099 R)
• M18: 2,240,677 km (0.08 R)

Planet 2 - Gas Giant

Semi-Major Axis: 3.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 805.3

Radius: 14.5

Gravity: 3.83 G

Time & Orbit

Eccentricity (e): 0.229

Orbit Range: 2.42 AU - 3.86 AU

Year: 3650 Days

Day: 9.1 Hours

Environment

Temp: -196 °C

Axial Tilt: 9.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 67,661,003 km

• M1: 186,848 km (0.117 R)
• M2: 300,542 km (0.078 R)
• M3: 595,699 km (0.066 R)
• M4: 750,084 km (0.109 R)
• M5: 1,091,017 km (0.095 R)
• M6: 1,369,120 km (0.099 R)
• M7: 1,481,318 km (0.071 R)
• M8: 1,596,957 km (0.092 R)
• M9: 1,776,475 km (0.054 R)
• M10: 1,978,731 km (0.099 R)
• M11: 2,074,773 km (0.118 R)
• M12: 2,255,188 km (0.106 R)
• M13: 2,372,772 km (0.072 R)
• M14: 2,973,706 km (0.057 R)
• M15: 3,084,558 km (0.116 R)
• M16: 3,426,090 km (0.034 R)
• M17: 3,780,039 km (0.107 R)
• M18: 3,941,156 km (0.07 R)
• M19: 4,063,527 km (0.058 R)
• M20: 4,868,513 km (0.09 R)
• M21: 5,424,868 km (0.117 R)
• M22: 5,653,304 km (0.108 R)
• M23: 5,745,456 km (0.099 R)
• M24: 5,884,731 km (0.086 R)
• M25: 6,025,204 km (0.108 R)
• M26: 6,190,509 km (0.052 R)
• M27: 6,768,855 km (0.079 R)
• M28: 7,414,968 km (0.104 R)
• M29: 7,745,579 km (0.067 R)
• M30: 7,848,203 km (0.111 R)
• M31: 8,739,508 km (0.057 R)
• M32: 9,251,731 km (0.066 R)
• M33: 9,388,014 km (0.116 R)
• M34: 9,635,300 km (0.098 R)
• M35: 9,829,178 km (0.042 R)
• M36: 9,996,279 km (0.106 R)
• M37: 10,305,199 km (0.04 R)
• M38: 10,674,406 km (0.1 R)
• M39: 10,903,740 km (0.091 R)
• M40: 11,076,825 km (0.102 R)
• M41: 11,250,957 km (0.077 R)
• M42: 11,455,158 km (0.071 R)
• M43: 13,409,504 km (0.07 R)
• M44: 13,781,554 km (0.092 R)
• M45: 14,157,045 km (0.111 R)
• M46: 14,504,262 km (0.06 R)
• M47: 15,207,072 km (0.091 R)
• M48: 15,465,428 km (0.025 R)
• M49: 15,790,354 km (0.085 R)
• M50: 16,084,763 km (0.067 R)
• M51: 16,513,211 km (0.114 R)
• M52: 17,448,946 km (0.032 R)
• M53: 17,550,224 km (0.099 R)
• M54: 17,991,388 km (0.1 R)
• M55: 18,298,961 km (0.105 R)
• M56: 18,815,523 km (0.066 R)
• M57: 19,581,763 km (0.058 R)
• M58: 19,968,773 km (0.095 R)
• M59: 20,393,780 km (0.116 R)
• M60: 20,571,802 km (0.109 R)
• M61: 21,000,998 km (0.033 R)
• M62: 21,180,815 km (0.086 R)
• M63: 21,288,824 km (0.049 R)
• M64: 21,614,349 km (0.073 R)
• M65: 21,977,722 km (0.062 R)
• M66: 22,490,095 km (0.119 R)
• M67: 23,265,910 km (0.055 R)
• M68: 24,276,294 km (0.11 R)
• M69: 24,389,539 km (0.045 R)
• M70: 24,578,481 km (0.064 R)

Planet 3 - Gas Giant

Semi-Major Axis: 5.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 351.7

Radius: 8

Gravity: 5.5 G

Time & Orbit

Eccentricity (e): 0.24

Orbit Range: 4.28 AU - 6.98 AU

Year: 8763 Days

Day: 12.1 Hours

Environment

Temp: -228 °C

Axial Tilt: 49 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 67,661,003 km

• M1: 151,393 km (0.037 R)
• M2: 309,668 km (0.089 R)
• M3: 479,611 km (0.119 R)
• M4: 627,563 km (0.092 R)
• M5: 721,062 km (0.053 R)
• M6: 1,174,792 km (0.117 R)
• M7: 1,326,185 km (0.078 R)
• M8: 1,556,416 km (0.106 R)
• M9: 1,667,119 km (0.093 R)
• M10: 2,820,817 km (0.076 R)
• M11: 3,117,620 km (0.101 R)
• M12: 3,234,456 km (0.101 R)
• M13: 3,328,852 km (0.077 R)
• M14: 3,815,194 km (0.081 R)
• M15: 3,915,275 km (0.09 R)
• M16: 3,965,540 km (0.119 R)
• M17: 4,143,412 km (0.075 R)
• M18: 4,559,743 km (0.09 R)
• M19: 5,044,141 km (0.11 R)
• M20: 5,376,099 km (0.075 R)
• M21: 5,715,237 km (0.106 R)
• M22: 5,829,829 km (0.038 R)
• M23: 6,003,213 km (0.071 R)
• M24: 6,473,848 km (0.108 R)
• M25: 6,925,783 km (0.071 R)
• M26: 7,325,808 km (0.084 R)
• M27: 7,733,312 km (0.045 R)
• M28: 7,923,900 km (0.072 R)
• M29: 9,267,289 km (0.087 R)
• M30: 9,571,571 km (0.075 R)
• M31: 10,679,792 km (0.057 R)
• M32: 11,791,603 km (0.116 R)
• M33: 12,084,516 km (0.055 R)
• M34: 12,491,273 km (0.039 R)
• M35: 12,902,368 km (0.099 R)
• M36: 13,242,104 km (0.079 R)
• M37: 13,814,915 km (0.11 R)
• M38: 14,551,983 km (0.112 R)
• M39: 14,669,567 km (0.108 R)
• M40: 15,103,251 km (0.1 R)
• M41: 15,261,975 km (0.098 R)
• M42: 15,501,182 km (0.113 R)
• M43: 16,429,586 km (0.091 R)
• M44: 16,797,747 km (0.099 R)
• M45: 16,880,025 km (0.113 R)
• M46: 17,003,593 km (0.102 R)
• M47: 18,339,951 km (0.091 R)
• M48: 18,424,474 km (0.119 R)
• M49: 18,892,416 km (0.082 R)
• M50: 19,536,734 km (0.048 R)
• M51: 20,057,335 km (0.088 R)
• M52: 20,188,233 km (0.051 R)
• M53: 20,363,113 km (0.099 R)
• M54: 20,626,405 km (0.075 R)
• M55: 20,802,631 km (0.106 R)
• M56: 21,467,893 km (0.114 R)
• M57: 21,691,093 km (0.032 R)
• M58: 22,230,094 km (0.046 R)
• M59: 22,546,643 km (0.116 R)
• M60: 23,688,972 km (0.107 R)
• M61: 24,663,154 km (0.11 R)
• M62: 25,367,012 km (0.12 R)
• M63: 25,555,804 km (0.114 R)
• M64: 26,506,798 km (0.119 R)
• M65: 27,663,189 km (0.029 R)
• M66: 27,808,898 km (0.096 R)
• M67: 27,906,136 km (0.106 R)
• M68: 28,247,519 km (0.103 R)
• M69: 28,443,193 km (0.101 R)
• M70: 28,590,247 km (0.079 R)
• M71: 28,737,601 km (0.086 R)
• M72: 28,934,472 km (0.119 R)
• M73: 29,280,043 km (0.104 R)
• M74: 29,527,628 km (0.067 R)
• M75: 29,875,443 km (0.118 R)
• M76: 30,124,822 km (0.101 R)
• M77: 30,274,719 km (0.105 R)
• M78: 30,475,031 km (0.083 R)
• M79: 30,575,262 km (0.062 R)
• M80: 31,280,466 km (0.097 R)
• M81: 31,635,163 km (0.118 R)
• M82: 31,685,876 km (0.117 R)
• M83: 32,963,891 km (0.058 R)
• M84: 33,066,814 km (0.101 R)
• M85: 34,206,600 km (0.093 R)
• M86: 34,467,349 km (0.077 R)
• M87: 35,096,109 km (0.104 R)
• M88: 35,148,618 km (0.043 R)

Planet 4 - Ice Giant

Semi-Major Axis: 7.1 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 316.8

Radius: 3.3

Gravity: 29.09 G

Time & Orbit

Eccentricity (e): 0.045

Orbit Range: 6.78 AU - 7.42 AU

Year: 12411 Days

Day: 16 Hours

Environment

Temp: -214 °C

Axial Tilt: 41.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 67,661,003 km

• M1: 77,492 km (0.108 R)
• M2: 162,014 km (0.066 R)
• M3: 220,358 km (0.099 R)
• M4: 252,222 km (0.086 R)
• M5: 321,037 km (0.09 R)
• M6: 435,779 km (0.106 R)
• M7: 533,616 km (0.099 R)
• M8: 749,785 km (0.035 R)
• M9: 1,045,240 km (0.091 R)
• M10: 1,353,113 km (0.079 R)
• M11: 1,413,849 km (0.115 R)
• M12: 1,496,128 km (0.096 R)
• M13: 1,908,420 km (0.105 R)
• M14: 2,022,563 km (0.102 R)
• M15: 2,257,432 km (0.107 R)
• M16: 2,500,828 km (0.094 R)
• M17: 2,933,614 km (0.1 R)
• M18: 3,091,739 km (0.112 R)
• M19: 3,610,993 km (0.111 R)
• M20: 3,639,118 km (0.111 R)
• M21: 4,127,405 km (0.075 R)
• M22: 5,100,839 km (0.064 R)
• M23: 5,195,684 km (0.098 R)
• M24: 5,387,019 km (0.033 R)
• M25: 6,242,270 km (0.103 R)
• M26: 6,275,930 km (0.099 R)
• M27: 6,309,739 km (0.037 R)
• M28: 6,789,200 km (0.045 R)
• M29: 6,963,332 km (0.102 R)
• M30: 7,638,018 km (0.053 R)
• M31: 8,111,645 km (0.115 R)
• M32: 8,632,246 km (0.111 R)
• M33: 8,896,585 km (0.111 R)
• M34: 9,163,618 km (0.104 R)
• M35: 9,588,476 km (0.104 R)
• M36: 9,822,895 km (0.108 R)
• M37: 9,862,090 km (0.066 R)
• M38: 10,019,617 km (0.112 R)
• M39: 10,178,041 km (0.119 R)
• M40: 11,350,888 km (0.101 R)
• M41: 11,433,466 km (0.042 R)
• M42: 12,523,287 km (0.087 R)
• M43: 12,736,613 km (0.062 R)
• M44: 13,470,989 km (0.091 R)
• M45: 13,689,701 km (0.119 R)
• M46: 14,397,000 km (0.051 R)
• M47: 16,124,107 km (0.051 R)
• M48: 16,309,758 km (0.057 R)
• M49: 17,106,217 km (0.096 R)
• M50: 17,915,392 km (0.085 R)
• M51: 18,300,457 km (0.108 R)
• M52: 18,542,506 km (0.073 R)
• M53: 18,736,984 km (0.072 R)
• M54: 19,225,870 km (0.067 R)
• M55: 20,516,750 km (0.075 R)
• M56: 21,020,745 km (0.12 R)
• M57: 22,143,626 km (0.11 R)
• M58: 22,816,218 km (0.105 R)
• M59: 22,972,399 km (0.089 R)
• M60: 23,128,878 km (0.048 R)
• M61: 23,600,560 km (0.079 R)
• M62: 24,393,728 km (0.037 R)
• M63: 25,681,018 km (0.109 R)
• M64: 26,825,292 km (0.083 R)
• M65: 28,209,072 km (0.092 R)
• M66: 28,937,763 km (0.087 R)
• M67: 29,502,495 km (0.032 R)
• M68: 29,559,193 km (0.1 R)
• M69: 29,615,890 km (0.077 R)
• M70: 29,729,435 km (0.094 R)
• M71: 30,185,110 km (0.089 R)
• M72: 30,356,400 km (0.063 R)
• M73: 30,585,584 km (0.095 R)
• M74: 30,815,217 km (0.107 R)
• M75: 31,103,043 km (0.093 R)
• M76: 32,205,130 km (0.076 R)
• M77: 32,497,295 km (0.113 R)
• M78: 33,084,167 km (0.086 R)
• M79: 33,378,875 km (0.034 R)
• M80: 34,985,706 km (0.078 R)
• M81: 35,949,565 km (0.04 R)
• M82: 36,861,215 km (0.101 R)
• M83: 36,922,250 km (0.092 R)
• M84: 37,411,884 km (0.05 R)
• M85: 37,596,039 km (0.077 R)
• M86: 37,841,978 km (0.09 R)
• M87: 38,088,515 km (0.054 R)
• M88: 39,079,901 km (0.035 R)
• M89: 39,391,513 km (0.106 R)
• M90: 40,709,021 km (0.1 R)
• M91: 42,488,039 km (0.116 R)

Asteroid Belt

Center: 8.05 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 5 - Ice Giant

Semi-Major Axis: 8.99 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 99.8

Radius: 7.6

Gravity: 1.73 G

Time & Orbit

Eccentricity (e): 0.22

Orbit Range: 7.01 AU - 10.97 AU

Year: 17683 Days

Day: 23 Hours

Environment

Temp: -232 °C

Axial Tilt: 21.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 67,661,003 km

• M1: 111,600 km (0.065 R)
• M2: 335,398 km (0.118 R)
• M3: 530,773 km (0.068 R)
• M4: 621,729 km (0.047 R)
• M5: 865,274 km (0.044 R)
• M6: 1,022,352 km (0.111 R)
• M7: 1,154,746 km (0.094 R)
• M8: 1,223,112 km (0.047 R)
• M9: 1,346,231 km (0.112 R)
• M10: 1,739,823 km (0.105 R)
• M11: 2,339,412 km (0.108 R)
• M12: 2,493,198 km (0.068 R)
• M13: 2,582,508 km (0.076 R)
• M14: 2,673,015 km (0.078 R)
• M15: 3,459,152 km (0.119 R)
• M16: 3,534,100 km (0.095 R)
• M17: 4,392,792 km (0.084 R)
• M18: 4,665,359 km (0.1 R)
• M19: 5,255,672 km (0.117 R)
• M20: 5,839,553 km (0.04 R)
• M21: 6,382,743 km (0.053 R)
• M22: 6,629,280 km (0.067 R)
• M23: 7,036,635 km (0.083 R)
• M24: 7,227,372 km (0.073 R)
• M25: 7,974,464 km (0.112 R)
• M26: 8,240,000 km (0.115 R)
• M27: 9,123,226 km (0.072 R)
• M28: 9,823,045 km (0.088 R)
• M29: 10,036,222 km (0.097 R)
• M30: 10,503,715 km (0.1 R)
• M31: 10,648,825 km (0.047 R)
• M32: 11,199,495 km (0.118 R)
• M33: 12,023,779 km (0.108 R)
• M34: 13,650,806 km (0.099 R)
• M35: 14,208,507 km (0.099 R)
• M36: 14,328,933 km (0.119 R)
• M37: 14,449,808 km (0.045 R)
• M38: 15,099,811 km (0.117 R)
• M39: 16,009,067 km (0.076 R)
• M40: 16,344,016 km (0.1 R)
• M41: 16,428,090 km (0.065 R)
• M42: 16,893,340 km (0.064 R)
• M43: 17,320,142 km (0.119 R)
• M44: 17,836,853 km (0.093 R)
• M45: 19,017,929 km (0.051 R)
• M46: 19,328,344 km (0.113 R)
• M47: 19,640,405 km (0.098 R)
• M48: 19,953,962 km (0.049 R)
• M49: 20,044,020 km (0.081 R)
• M50: 20,134,078 km (0.038 R)
• M51: 20,269,315 km (0.079 R)
• M52: 20,586,313 km (0.057 R)
• M53: 22,195,836 km (0.03 R)
• M54: 22,289,036 km (0.084 R)
• M55: 23,702,436 km (0.118 R)
• M56: 24,227,974 km (0.077 R)
• M57: 24,950,681 km (0.09 R)
• M58: 26,121,883 km (0.096 R)
• M59: 26,862,841 km (0.092 R)
• M60: 28,264,423 km (0.103 R)
• M61: 28,923,402 km (0.065 R)
• M62: 29,280,193 km (0.119 R)
• M63: 29,536,005 km (0.1 R)
• M64: 30,359,541 km (0.085 R)
• M65: 31,976,395 km (0.072 R)
• M66: 33,407,448 km (0.1 R)
• M67: 34,642,828 km (0.111 R)
• M68: 35,402,037 km (0.081 R)
• M69: 35,456,491 km (0.12 R)
• M70: 35,510,944 km (0.063 R)
• M71: 35,565,547 km (0.066 R)
• M72: 35,838,414 km (0.11 R)
• M73: 36,386,391 km (0.098 R)
• M74: 36,771,605 km (0.098 R)

Planet 6 - Ice Giant

Semi-Major Axis: 9.57 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 510.8

Radius: 3.2

Gravity: 49.88 G

Time & Orbit

Eccentricity (e): 0.214

Orbit Range: 7.52 AU - 11.62 AU

Year: 19421 Days

Day: 16.6 Hours

Environment

Temp: -224 °C

Axial Tilt: 47.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 67,661,003 km

• M1: 128,654 km (0.114 R)
• M2: 307,124 km (0.056 R)
• M3: 642,822 km (0.106 R)
• M4: 707,000 km (0.068 R)
• M5: 1,033,572 km (0.105 R)
• M6: 1,428,660 km (0.06 R)
• M7: 1,456,634 km (0.072 R)
• M8: 1,715,588 km (0.077 R)
• M9: 2,019,870 km (0.11 R)
• M10: 2,711,312 km (0.112 R)
• M11: 2,815,731 km (0.038 R)
• M12: 3,028,310 km (0.078 R)
• M13: 3,319,726 km (0.118 R)
• M14: 3,658,117 km (0.097 R)
• M15: 3,734,860 km (0.109 R)
• M16: 4,367,510 km (0.066 R)
• M17: 4,696,176 km (0.052 R)
• M18: 4,990,136 km (0.065 R)
• M19: 5,246,996 km (0.07 R)
• M20: 5,684,420 km (0.062 R)
• M21: 6,270,395 km (0.117 R)
• M22: 6,408,324 km (0.093 R)
• M23: 7,017,636 km (0.105 R)
• M24: 7,450,124 km (0.077 R)
• M25: 7,792,403 km (0.102 R)
• M26: 8,240,150 km (0.112 R)
• M27: 8,340,829 km (0.059 R)
• M28: 8,696,124 km (0.043 R)
• M29: 10,382,391 km (0.11 R)
• M30: 10,709,562 km (0.084 R)
• M31: 10,764,464 km (0.104 R)
• M32: 11,095,524 km (0.027 R)
• M33: 11,151,025 km (0.078 R)
• M34: 11,206,676 km (0.054 R)
• M35: 11,486,125 km (0.11 R)
• M36: 12,453,125 km (0.033 R)
• M37: 12,742,447 km (0.065 R)
• M38: 13,564,338 km (0.119 R)
• M39: 14,463,721 km (0.039 R)
• M40: 15,012,595 km (0.097 R)
• M41: 15,074,080 km (0.12 R)
• M42: 17,662,572 km (0.095 R)
• M43: 18,314,370 km (0.108 R)
• M44: 19,978,048 km (0.109 R)
• M45: 20,316,588 km (0.047 R)
• M46: 22,317,010 km (0.069 R)
• M47: 22,668,117 km (0.109 R)
• M48: 23,376,014 km (0.07 R)
• M49: 23,661,147 km (0.082 R)
• M50: 24,740,795 km (0.068 R)
• M51: 25,983,654 km (0.059 R)
• M52: 26,205,059 km (0.099 R)
• M53: 26,724,164 km (0.12 R)
• M54: 26,947,663 km (0.085 R)
• M55: 27,998,887 km (0.072 R)
• M56: 28,834,092 km (0.101 R)
• M57: 29,986,295 km (0.1 R)
• M58: 30,529,185 km (0.099 R)
• M59: 31,624,541 km (0.108 R)
• M60: 34,095,449 km (0.083 R)
• M61: 34,743,058 km (0.074 R)
• M62: 35,394,707 km (0.107 R)
• M63: 36,627,543 km (0.097 R)
• M64: 37,623,864 km (0.111 R)
• M65: 39,134,803 km (0.092 R)
• M66: 39,897,902 km (0.087 R)
• M67: 40,323,807 km (0.107 R)
• M68: 40,494,648 km (0.11 R)
• M69: 41,008,516 km (0.097 R)
• M70: 41,697,115 km (0.06 R)
• M71: 42,215,921 km (0.043 R)
• M72: 42,302,687 km (0.06 R)
• M73: 45,996,857 km (0.025 R)
• M74: 47,882,239 km (0.106 R)
• M75: 47,972,746 km (0.112 R)
• M76: 48,971,013 km (0.038 R)
• M77: 49,792,754 km (0.109 R)
• M78: 51,542,750 km (0.093 R)
• M79: 52,006,653 km (0.029 R)
• M80: 52,285,503 km (0.042 R)
• M81: 53,218,994 km (0.049 R)
• M82: 54,724,098 km (0.116 R)
• M83: 55,292,121 km (0.118 R)
• M84: 55,576,806 km (0.114 R)
• M85: 56,624,888 km (0.089 R)
• M86: 57,487,320 km (0.117 R)
• M87: 59,225,199 km (0.084 R)
• M88: 59,905,719 km (0.037 R)
• M89: 63,346,620 km (0.108 R)
• M90: 65,642,498 km (0.11 R)
• M91: 66,245,976 km (0.118 R)
• M92: 66,952,228 km (0.091 R)
• M93: 67,255,612 km (0.094 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 148 - 12,841 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit