🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.39 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.78

Radius: 1.26

Gravity: 1.12 G

Time & Orbit

Eccentricity (e): 0.088

Orbit Range: 1.27 AU - 1.51 AU

Year: 605 Days

Day: 18.3 Hours

Environment

Temp: -34 °C

Axial Tilt: 27.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 1.44 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.55

Radius: 1.19

Gravity: 1.09 G

Time & Orbit

Eccentricity (e): 0.223

Orbit Range: 1.12 AU - 1.76 AU

Year: 638 Days

Day: 21.2 Hours

Environment

Temp: -28 °C

Axial Tilt: 18.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 103,995,253 km

• M1: 88,562 km (0.105 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.84 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.63

Radius: 0.83

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.248

Orbit Range: 1.38 AU - 2.3 AU

Year: 921 Days

Day: 17.4 Hours

Environment

Temp: -54 °C

Axial Tilt: 46.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 4.55 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.67

Radius: 1.48

Gravity: 1.22 G

Time & Orbit

Eccentricity (e): 0.232

Orbit Range: 3.49 AU - 5.61 AU

Year: 3581 Days

Day: 14.5 Hours

Environment

Temp: -133 °C

Axial Tilt: 38.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 4.79 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 98.2

Radius: 14.1

Gravity: 0.49 G

Time & Orbit

Eccentricity (e): 0.241

Orbit Range: 3.64 AU - 5.94 AU

Year: 3868 Days

Day: 12.4 Hours

Environment

Temp: -133 °C

Axial Tilt: 15.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (41)

Outer Limit: 103,995,253 km

• M1: 276,606 km (0.041 R)
• M2: 403,316 km (0.059 R)
• M3: 628,909 km (0.089 R)
• M4: 777,161 km (0.084 R)
• M5: 992,881 km (0.114 R)
• M6: 1,096,552 km (0.077 R)
• M7: 1,263,803 km (0.088 R)
• M8: 1,494,632 km (0.061 R)
• M9: 1,897,649 km (0.117 R)
• M10: 2,238,433 km (0.074 R)
• M11: 2,432,761 km (0.04 R)
• M12: 2,576,674 km (0.067 R)
• M13: 2,780,875 km (0.045 R)
• M14: 3,302,672 km (0.041 R)
• M15: 3,998,003 km (0.054 R)
• M16: 4,129,350 km (0.085 R)
• M17: 4,342,677 km (0.084 R)
• M18: 4,532,217 km (0.112 R)
• M19: 4,877,788 km (0.044 R)
• M20: 5,032,472 km (0.112 R)
• M21: 5,203,313 km (0.119 R)
• M22: 5,347,077 km (0.072 R)
• M23: 5,536,019 km (0.107 R)
• M24: 5,668,114 km (0.099 R)
• M25: 5,860,796 km (0.092 R)
• M26: 7,238,143 km (0.113 R)
• M27: 7,366,648 km (0.067 R)
• M28: 7,626,200 km (0.078 R)
• M29: 8,865,619 km (0.078 R)
• M30: 9,809,432 km (0.117 R)
• M31: 9,987,603 km (0.113 R)
• M32: 10,149,019 km (0.085 R)
• M33: 10,365,636 km (0.119 R)
• M34: 10,784,959 km (0.07 R)
• M35: 11,098,516 km (0.059 R)
• M36: 11,396,366 km (0.1 R)
• M37: 11,565,112 km (0.032 R)
• M38: 11,962,145 km (0.056 R)
• M39: 12,653,138 km (0.039 R)
• M40: 12,827,868 km (0.119 R)
• M41: 13,199,469 km (0.114 R)

Planet 6 - Gas Giant

Semi-Major Axis: 9.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 360.5

Radius: 13.7

Gravity: 1.92 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 7.59 AU - 11.53 AU

Year: 10906 Days

Day: 10.2 Hours

Environment

Temp: -176 °C

Axial Tilt: 31.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 103,995,253 km

• M1: 177,124 km (0.118 R)
• M2: 878,588 km (0.09 R)
• M3: 1,365,978 km (0.109 R)
• M4: 1,520,214 km (0.119 R)
• M5: 1,639,742 km (0.076 R)
• M6: 1,742,067 km (0.077 R)
• M7: 2,018,374 km (0.088 R)
• M8: 2,734,799 km (0.115 R)
• M9: 2,907,135 km (0.113 R)
• M10: 3,262,730 km (0.026 R)
• M11: 3,393,179 km (0.072 R)
• M12: 3,849,901 km (0.085 R)
• M13: 3,988,130 km (0.104 R)
• M14: 4,184,402 km (0.104 R)
• M15: 4,851,758 km (0.098 R)
• M16: 5,031,425 km (0.113 R)
• M17: 5,213,336 km (0.045 R)
• M18: 5,366,524 km (0.055 R)
• M19: 5,646,272 km (0.065 R)
• M20: 5,994,686 km (0.117 R)
• M21: 6,285,205 km (0.113 R)
• M22: 6,980,685 km (0.119 R)
• M23: 7,423,645 km (0.108 R)
• M24: 7,527,166 km (0.115 R)
• M25: 7,770,712 km (0.119 R)
• M26: 8,444,800 km (0.099 R)
• M27: 9,434,839 km (0.1 R)
• M28: 9,622,285 km (0.105 R)
• M29: 9,773,079 km (0.064 R)
• M30: 10,500,275 km (0.066 R)
• M31: 11,403,846 km (0.051 R)
• M32: 11,724,135 km (0.049 R)
• M33: 11,845,010 km (0.071 R)
• M34: 12,128,498 km (0.075 R)
• M35: 12,661,216 km (0.109 R)
• M36: 13,076,051 km (0.03 R)
• M37: 13,411,300 km (0.091 R)
• M38: 13,622,233 km (0.083 R)
• M39: 13,749,391 km (0.076 R)
• M40: 14,347,782 km (0.106 R)
• M41: 14,867,485 km (0.104 R)
• M42: 14,954,701 km (0.089 R)
• M43: 15,217,395 km (0.113 R)
• M44: 15,349,340 km (0.064 R)
• M45: 15,481,584 km (0.095 R)
• M46: 16,825,572 km (0.115 R)
• M47: 18,113,460 km (0.11 R)
• M48: 18,675,200 km (0.108 R)
• M49: 20,056,138 km (0.09 R)
• M50: 20,152,628 km (0.087 R)
• M51: 20,394,379 km (0.1 R)
• M52: 20,539,937 km (0.044 R)
• M53: 20,783,333 km (0.078 R)
• M54: 21,568,572 km (0.075 R)
• M55: 22,613,813 km (0.027 R)
• M56: 23,472,205 km (0.093 R)
• M57: 23,675,658 km (0.098 R)
• M58: 24,084,360 km (0.052 R)
• M59: 24,238,296 km (0.09 R)
• M60: 25,272,615 km (0.108 R)
• M61: 26,163,172 km (0.11 R)
• M62: 26,585,786 km (0.113 R)
• M63: 27,117,307 km (0.105 R)
• M64: 28,136,816 km (0.082 R)
• M65: 29,223,495 km (0.087 R)
• M66: 31,887,235 km (0.03 R)
• M67: 32,451,967 km (0.096 R)
• M68: 32,792,452 km (0.115 R)
• M69: 33,534,008 km (0.065 R)
• M70: 34,685,762 km (0.077 R)
• M71: 34,917,639 km (0.116 R)
• M72: 36,496,495 km (0.099 R)
• M73: 37,205,589 km (0.094 R)
• M74: 37,443,001 km (0.054 R)
• M75: 37,561,931 km (0.112 R)
• M76: 38,637,689 km (0.091 R)
• M77: 38,817,955 km (0.1 R)
• M78: 39,299,959 km (0.1 R)
• M79: 39,784,058 km (0.081 R)
• M80: 40,148,478 km (0.091 R)

Planet 7 - Ice Giant

Semi-Major Axis: 13.31 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 875.9

Radius: 4.5

Gravity: 43.25 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 10.98 AU - 15.64 AU

Year: 17916 Days

Day: 22.3 Hours

Environment

Temp: -179 °C

Axial Tilt: 33.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 103,995,253 km

• M1: 289,322 km (0.089 R)
• M2: 454,478 km (0.073 R)
• M3: 558,150 km (0.043 R)
• M4: 601,832 km (0.114 R)
• M5: 716,125 km (0.068 R)
• M6: 1,072,318 km (0.106 R)
• M7: 1,662,780 km (0.114 R)
• M8: 1,694,495 km (0.116 R)
• M9: 1,758,822 km (0.093 R)
• M10: 1,956,441 km (0.086 R)
• M11: 2,444,728 km (0.09 R)
• M12: 2,777,883 km (0.087 R)
• M13: 2,853,879 km (0.118 R)
• M14: 3,046,710 km (0.064 R)
• M15: 3,485,930 km (0.07 R)
• M16: 3,526,770 km (0.045 R)
• M17: 4,422,412 km (0.11 R)
• M18: 4,645,463 km (0.081 R)
• M19: 4,690,641 km (0.109 R)
• M20: 4,964,106 km (0.114 R)
• M21: 5,056,408 km (0.086 R)
• M22: 5,766,699 km (0.043 R)
• M23: 6,407,277 km (0.099 R)
• M24: 7,808,111 km (0.068 R)
• M25: 8,077,537 km (0.116 R)
• M26: 8,570,312 km (0.07 R)
• M27: 8,792,465 km (0.097 R)
• M28: 9,299,153 km (0.056 R)
• M29: 9,642,181 km (0.112 R)
• M30: 10,047,591 km (0.104 R)
• M31: 10,105,935 km (0.088 R)
• M32: 10,164,427 km (0.081 R)
• M33: 10,340,504 km (0.083 R)
• M34: 10,875,017 km (0.069 R)
• M35: 11,115,421 km (0.113 R)
• M36: 12,156,622 km (0.073 R)
• M37: 12,720,307 km (0.038 R)
• M38: 13,678,781 km (0.104 R)
• M39: 14,992,250 km (0.118 R)
• M40: 15,528,857 km (0.118 R)
• M41: 15,596,326 km (0.075 R)
• M42: 16,003,531 km (0.06 R)
• M43: 16,482,993 km (0.059 R)
• M44: 16,689,886 km (0.084 R)
• M45: 17,455,977 km (0.102 R)
• M46: 17,596,450 km (0.071 R)
• M47: 20,930,088 km (0.115 R)
• M48: 21,228,985 km (0.088 R)
• M49: 22,515,078 km (0.111 R)
• M50: 23,051,835 km (0.038 R)
• M51: 24,766,376 km (0.092 R)
• M52: 26,440,975 km (0.113 R)
• M53: 26,763,957 km (0.092 R)
• M54: 28,151,627 km (0.106 R)
• M55: 29,061,930 km (0.053 R)
• M56: 29,311,758 km (0.095 R)
• M57: 29,729,884 km (0.062 R)
• M58: 29,813,808 km (0.113 R)
• M59: 29,897,733 km (0.11 R)
• M60: 31,251,444 km (0.063 R)
• M61: 32,366,098 km (0.03 R)
• M62: 32,884,903 km (0.073 R)
• M63: 32,971,670 km (0.048 R)
• M64: 33,493,617 km (0.116 R)
• M65: 33,580,832 km (0.029 R)
• M66: 34,106,071 km (0.091 R)
• M67: 34,193,885 km (0.12 R)
• M68: 34,281,698 km (0.09 R)
• M69: 39,320,903 km (0.1 R)
• M70: 40,616,271 km (0.088 R)
• M71: 42,490,882 km (0.092 R)
• M72: 42,585,427 km (0.059 R)
• M73: 43,629,321 km (0.088 R)
• M74: 44,106,539 km (0.051 R)
• M75: 44,489,509 km (0.1 R)
• M76: 44,585,551 km (0.076 R)
• M77: 45,452,022 km (0.076 R)
• M78: 47,887,924 km (0.09 R)
• M79: 48,380,251 km (0.113 R)
• M80: 51,973,741 km (0.092 R)
• M81: 52,378,254 km (0.066 R)
• M82: 55,755,426 km (0.101 R)
• M83: 60,154,351 km (0.119 R)
• M84: 60,260,416 km (0.036 R)
• M85: 60,791,788 km (0.076 R)
• M86: 62,073,392 km (0.117 R)
• M87: 63,255,964 km (0.109 R)
• M88: 65,098,261 km (0.112 R)
• M89: 65,861,959 km (0.091 R)
• M90: 66,409,337 km (0.096 R)
• M91: 67,178,121 km (0.086 R)
• M92: 70,506,075 km (0.081 R)
• M93: 70,729,873 km (0.116 R)
• M94: 71,964,804 km (0.093 R)
• M95: 72,641,435 km (0.111 R)
• M96: 73,093,669 km (0.119 R)

Planet 8 - Ice Giant

Semi-Major Axis: 17.93 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 570.6

Radius: 3.2

Gravity: 55.72 G

Time & Orbit

Eccentricity (e): 0.056

Orbit Range: 16.93 AU - 18.93 AU

Year: 28012 Days

Day: 15.7 Hours

Environment

Temp: -191 °C

Axial Tilt: 45.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 103,995,253 km

• M1: 71,508 km (0.105 R)
• M2: 157,527 km (0.08 R)
• M3: 703,409 km (0.09 R)
• M4: 1,102,088 km (0.111 R)
• M5: 1,291,030 km (0.074 R)
• M6: 1,916,648 km (0.064 R)
• M7: 1,991,297 km (0.072 R)
• M8: 3,219,197 km (0.076 R)
• M9: 3,263,478 km (0.106 R)
• M10: 3,442,546 km (0.057 R)
• M11: 4,142,215 km (0.07 R)
• M12: 4,190,386 km (0.119 R)
• M13: 4,833,358 km (0.054 R)
• M14: 5,140,332 km (0.105 R)
• M15: 5,296,213 km (0.066 R)
• M16: 5,989,300 km (0.094 R)
• M17: 7,225,876 km (0.11 R)
• M18: 8,293,856 km (0.119 R)
• M19: 8,722,304 km (0.097 R)
• M20: 8,846,021 km (0.071 R)
• M21: 11,036,583 km (0.104 R)
• M22: 11,304,812 km (0.118 R)
• M23: 11,779,336 km (0.089 R)
• M24: 12,053,400 km (0.111 R)
• M25: 12,817,845 km (0.114 R)
• M26: 13,099,687 km (0.109 R)
• M27: 13,241,356 km (0.113 R)
• M28: 13,383,624 km (0.074 R)
• M29: 14,102,142 km (0.049 R)
• M30: 14,539,267 km (0.097 R)
• M31: 16,331,899 km (0.061 R)
• M32: 16,713,972 km (0.098 R)
• M33: 18,509,445 km (0.08 R)
• M34: 19,712,811 km (0.069 R)
• M35: 20,858,730 km (0.119 R)
• M36: 21,189,940 km (0.107 R)
• M37: 23,643,644 km (0.077 R)
• M38: 23,729,813 km (0.057 R)
• M39: 24,597,480 km (0.113 R)
• M40: 25,035,204 km (0.117 R)
• M41: 25,652,444 km (0.102 R)
• M42: 27,081,703 km (0.111 R)
• M43: 27,171,910 km (0.037 R)
• M44: 27,352,624 km (0.052 R)
• M45: 27,988,116 km (0.032 R)
• M46: 28,262,030 km (0.066 R)
• M47: 28,536,691 km (0.03 R)
• M48: 28,720,398 km (0.089 R)
• M49: 29,366,212 km (0.066 R)
• M50: 30,297,159 km (0.11 R)
• M51: 32,187,927 km (0.12 R)
• M52: 35,785,007 km (0.106 R)
• M53: 36,380,257 km (0.063 R)
• M54: 38,590,416 km (0.087 R)
• M55: 39,302,801 km (0.064 R)
• M56: 39,814,277 km (0.079 R)
• M57: 41,154,225 km (0.075 R)
• M58: 41,465,687 km (0.113 R)
• M59: 43,772,487 km (0.11 R)
• M60: 44,302,661 km (0.077 R)
• M61: 46,444,155 km (0.049 R)
• M62: 47,527,543 km (0.109 R)
• M63: 49,939,958 km (0.109 R)
• M64: 50,161,363 km (0.102 R)
• M65: 50,827,073 km (0.086 R)
• M66: 51,272,576 km (0.099 R)
• M67: 51,607,525 km (0.11 R)
• M68: 52,279,669 km (0.109 R)
• M69: 52,954,804 km (0.096 R)
• M70: 54,654,834 km (0.119 R)
• M71: 56,718,537 km (0.081 R)
• M72: 58,108,451 km (0.109 R)
• M73: 58,224,838 km (0.11 R)
• M74: 58,457,762 km (0.1 R)
• M75: 62,702,452 km (0.106 R)
• M76: 63,180,118 km (0.075 R)
• M77: 69,129,475 km (0.119 R)
• M78: 70,117,719 km (0.114 R)
• M79: 71,858,140 km (0.05 R)
• M80: 77,036,471 km (0.104 R)
• M81: 77,292,133 km (0.04 R)
• M82: 77,804,357 km (0.111 R)
• M83: 78,060,767 km (0.097 R)
• M84: 78,189,122 km (0.103 R)
• M85: 78,960,748 km (0.07 R)
• M86: 81,420,885 km (0.119 R)
• M87: 83,118,522 km (0.116 R)
• M88: 83,249,719 km (0.077 R)
• M89: 89,621,541 km (0.03 R)

Planet 9 - Ice Giant

Semi-Major Axis: 18.53 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 807.7

Radius: 5.6

Gravity: 25.76 G

Time & Orbit

Eccentricity (e): 0.232

Orbit Range: 14.23 AU - 22.83 AU

Year: 29430 Days

Day: 24.7 Hours

Environment

Temp: -194 °C

Axial Tilt: 46.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 103,995,253 km

• M1: 117,883 km (0.038 R)
• M2: 505,342 km (0.044 R)
• M3: 1,196,933 km (0.116 R)
• M4: 1,446,911 km (0.093 R)
• M5: 1,483,861 km (0.105 R)
• M6: 1,521,261 km (0.106 R)
• M7: 1,791,883 km (0.067 R)
• M8: 1,953,299 km (0.047 R)
• M9: 2,119,353 km (0.057 R)
• M10: 3,160,853 km (0.113 R)
• M11: 3,965,092 km (0.056 R)
• M12: 4,069,810 km (0.108 R)
• M13: 4,662,517 km (0.071 R)
• M14: 4,940,918 km (0.1 R)
• M15: 4,997,167 km (0.113 R)
• M16: 5,455,386 km (0.093 R)
• M17: 5,748,597 km (0.071 R)
• M18: 6,289,244 km (0.101 R)
• M19: 7,098,569 km (0.057 R)
• M20: 7,612,736 km (0.088 R)
• M21: 7,874,234 km (0.096 R)
• M22: 8,608,759 km (0.074 R)
• M23: 8,676,677 km (0.067 R)
• M24: 9,156,736 km (0.099 R)
• M25: 9,645,323 km (0.111 R)
• M26: 9,857,303 km (0.081 R)
• M27: 11,013,694 km (0.093 R)
• M28: 13,847,527 km (0.114 R)
• M29: 15,467,522 km (0.11 R)
• M30: 15,550,100 km (0.107 R)
• M31: 16,721,302 km (0.069 R)
• M32: 17,575,057 km (0.029 R)
• M33: 20,401,110 km (0.093 R)
• M34: 21,588,768 km (0.109 R)
• M35: 23,554,185 km (0.117 R)
• M36: 24,221,990 km (0.095 R)
• M37: 24,702,797 km (0.055 R)
• M38: 26,065,783 km (0.056 R)
• M39: 26,360,940 km (0.081 R)
• M40: 27,153,659 km (0.096 R)
• M41: 28,863,862 km (0.045 R)
• M42: 29,680,666 km (0.08 R)
• M43: 30,298,356 km (0.099 R)
• M44: 30,816,264 km (0.113 R)
• M45: 30,920,234 km (0.077 R)
• M46: 34,738,570 km (0.114 R)
• M47: 35,607,136 km (0.083 R)
• M48: 36,153,467 km (0.118 R)
• M49: 36,482,732 km (0.097 R)
• M50: 37,809,366 km (0.04 R)
• M51: 38,032,117 km (0.106 R)
• M52: 39,715,841 km (0.108 R)
• M53: 39,828,937 km (0.107 R)
• M54: 41,883,215 km (0.118 R)
• M55: 42,228,936 km (0.107 R)
• M56: 43,039,307 km (0.1 R)
• M57: 46,808,725 km (0.039 R)
• M58: 54,280,391 km (0.12 R)
• M59: 55,161,073 km (0.035 R)
• M60: 55,919,834 km (0.09 R)
• M61: 56,554,727 km (0.098 R)
• M62: 56,682,035 km (0.059 R)
• M63: 58,345,114 km (0.094 R)
• M64: 62,243,784 km (0.058 R)
• M65: 63,165,607 km (0.105 R)
• M66: 63,297,552 km (0.088 R)
• M67: 63,959,223 km (0.09 R)
• M68: 65,289,298 km (0.058 R)
• M69: 65,422,889 km (0.114 R)
• M70: 65,556,480 km (0.062 R)
• M71: 66,494,159 km (0.054 R)
• M72: 66,628,498 km (0.1 R)
• M73: 68,112,060 km (0.063 R)
• M74: 70,700,103 km (0.091 R)
• M75: 74,014,893 km (0.06 R)
• M76: 74,432,720 km (0.105 R)
• M77: 78,228,915 km (0.092 R)
• M78: 80,508,188 km (0.11 R)
• M79: 81,081,298 km (0.104 R)
• M80: 83,098,176 km (0.098 R)
• M81: 86,593,830 km (0.105 R)
• M82: 88,507,336 km (0.113 R)
• M83: 89,691,703 km (0.097 R)
• M84: 89,840,104 km (0.085 R)
• M85: 92,975,825 km (0.054 R)
• M86: 94,028,994 km (0.089 R)
• M87: 95,086,052 km (0.107 R)
• M88: 95,237,445 km (0.085 R)
• M89: 97,059,846 km (0.112 R)
• M90: 97,517,167 km (0.105 R)
• M91: 98,740,429 km (0.108 R)
• M92: 98,893,617 km (0.086 R)
• M93: 102,130,167 km (0.102 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: 542 - 18,323 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit