🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.53 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.35

Radius: 1.62

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 0.44 AU - 0.62 AU

Year: 253 Days

Day: 28.7 Hours

Environment

Temp: -115 °C

Axial Tilt: 28.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 50,082,124 km

• M1: 138,228 km (0.095 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.96 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 483.6

Radius: 12.9

Gravity: 2.91 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 1.65 AU - 2.27 AU

Year: 1800 Days

Day: 7.5 Hours

Environment

Temp: -198 °C

Axial Tilt: 26.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (64)

Outer Limit: 50,082,124 km

• M1: 165,156 km (0.1 R)
• M2: 293,062 km (0.071 R)
• M3: 447,746 km (0.101 R)
• M4: 566,677 km (0.086 R)
• M5: 671,246 km (0.091 R)
• M6: 768,933 km (0.089 R)
• M7: 864,825 km (0.104 R)
• M8: 1,029,084 km (0.113 R)
• M9: 1,318,256 km (0.083 R)
• M10: 1,538,465 km (0.087 R)
• M11: 1,702,125 km (0.102 R)
• M12: 1,922,632 km (0.088 R)
• M13: 2,078,513 km (0.104 R)
• M14: 2,358,859 km (0.104 R)
• M15: 2,548,998 km (0.118 R)
• M16: 2,640,253 km (0.09 R)
• M17: 2,838,021 km (0.107 R)
• M18: 2,956,652 km (0.079 R)
• M19: 3,260,635 km (0.046 R)
• M20: 3,347,552 km (0.073 R)
• M21: 3,435,366 km (0.077 R)
• M22: 3,574,940 km (0.113 R)
• M23: 3,742,340 km (0.079 R)
• M24: 4,382,918 km (0.109 R)
• M25: 4,886,016 km (0.108 R)
• M26: 5,029,032 km (0.115 R)
• M27: 5,115,499 km (0.061 R)
• M28: 5,319,401 km (0.103 R)
• M29: 5,407,514 km (0.101 R)
• M30: 5,496,226 km (0.115 R)
• M31: 5,870,968 km (0.107 R)
• M32: 6,038,668 km (0.093 R)
• M33: 6,425,378 km (0.114 R)
• M34: 6,661,444 km (0.112 R)
• M35: 6,772,595 km (0.078 R)
• M36: 6,916,358 km (0.103 R)
• M37: 7,012,849 km (0.05 R)
• M38: 7,386,694 km (0.12 R)
• M39: 7,600,918 km (0.087 R)
• M40: 7,917,767 km (0.06 R)
• M41: 8,086,214 km (0.079 R)
• M42: 8,341,278 km (0.103 R)
• M43: 8,461,106 km (0.049 R)
• M44: 8,702,707 km (0.081 R)
• M45: 8,806,976 km (0.093 R)
• M46: 8,946,701 km (0.076 R)
• M47: 9,245,896 km (0.114 R)
• M48: 9,637,992 km (0.081 R)
• M49: 9,836,210 km (0.112 R)
• M50: 9,944,818 km (0.058 R)
• M51: 10,291,436 km (0.079 R)
• M52: 10,457,190 km (0.061 R)
• M53: 10,586,593 km (0.036 R)
• M54: 10,940,691 km (0.112 R)
• M55: 11,053,188 km (0.092 R)
• M56: 11,185,134 km (0.074 R)
• M57: 11,317,528 km (0.105 R)
• M58: 11,968,129 km (0.096 R)
• M59: 12,103,515 km (0.083 R)
• M60: 12,278,544 km (0.095 R)
• M61: 12,493,367 km (0.069 R)
• M62: 12,650,594 km (0.097 R)
• M63: 12,768,777 km (0.082 R)
• M64: 13,385,718 km (0.046 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 259.7

Radius: 13.5

Gravity: 1.42 G

Time & Orbit

Eccentricity (e): 0.207

Orbit Range: 2.31 AU - 3.51 AU

Year: 3256 Days

Day: 5.8 Hours

Environment

Temp: -205 °C

Axial Tilt: 32.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (66)

Outer Limit: 50,082,124 km

• M1: 168,447 km (0.119 R)
• M2: 260,899 km (0.096 R)
• M3: 515,215 km (0.077 R)
• M4: 728,841 km (0.032 R)
• M5: 894,745 km (0.025 R)
• M6: 991,983 km (0.058 R)
• M7: 1,419,385 km (0.11 R)
• M8: 1,589,029 km (0.104 R)
• M9: 1,676,394 km (0.102 R)
• M10: 1,984,117 km (0.07 R)
• M11: 2,199,537 km (0.071 R)
• M12: 2,385,039 km (0.12 R)
• M13: 2,473,451 km (0.116 R)
• M14: 2,601,806 km (0.071 R)
• M15: 2,946,031 km (0.075 R)
• M16: 3,123,753 km (0.053 R)
• M17: 3,234,904 km (0.059 R)
• M18: 3,432,822 km (0.094 R)
• M19: 3,533,203 km (0.078 R)
• M20: 4,035,403 km (0.115 R)
• M21: 4,218,062 km (0.08 R)
• M22: 4,388,005 km (0.119 R)
• M23: 4,686,901 km (0.085 R)
• M24: 4,830,814 km (0.071 R)
• M25: 5,025,142 km (0.119 R)
• M26: 5,123,278 km (0.116 R)
• M27: 5,222,013 km (0.095 R)
• M28: 5,674,546 km (0.094 R)
• M29: 5,759,668 km (0.091 R)
• M30: 5,948,610 km (0.087 R)
• M31: 6,104,790 km (0.038 R)
• M32: 6,368,082 km (0.093 R)
• M33: 6,474,446 km (0.105 R)
• M34: 6,815,380 km (0.099 R)
• M35: 7,235,899 km (0.119 R)
• M36: 7,347,051 km (0.105 R)
• M37: 7,440,101 km (0.076 R)
• M38: 7,570,999 km (0.074 R)
• M39: 7,797,191 km (0.052 R)
• M40: 8,372,544 km (0.107 R)
• M41: 8,763,892 km (0.108 R)
• M42: 9,041,396 km (0.104 R)
• M43: 9,503,654 km (0.061 R)
• M44: 10,221,723 km (0.101 R)
• M45: 10,514,038 km (0.097 R)
• M46: 10,745,615 km (0.107 R)
• M47: 11,235,249 km (0.074 R)
• M48: 11,450,371 km (0.095 R)
• M49: 11,862,962 km (0.114 R)
• M50: 12,148,095 km (0.116 R)
• M51: 12,324,770 km (0.093 R)
• M52: 12,524,483 km (0.04 R)
• M53: 12,769,973 km (0.115 R)
• M54: 12,927,051 km (0.076 R)
• M55: 13,084,877 km (0.079 R)
• M56: 13,311,368 km (0.072 R)
• M57: 14,183,823 km (0.1 R)
• M58: 14,276,723 km (0.11 R)
• M59: 14,650,419 km (0.078 R)
• M60: 14,768,003 km (0.044 R)
• M61: 15,264,668 km (0.078 R)
• M62: 15,455,405 km (0.109 R)
• M63: 15,742,932 km (0.063 R)
• M64: 15,839,123 km (0.086 R)
• M65: 15,983,934 km (0.082 R)
• M66: 16,226,133 km (0.104 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.96 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 742.8

Radius: 10.6

Gravity: 6.61 G

Time & Orbit

Eccentricity (e): 0.075

Orbit Range: 2.74 AU - 3.18 AU

Year: 3341 Days

Day: 9.2 Hours

Environment

Temp: -204 °C

Axial Tilt: 26.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 50,082,124 km

• M1: 142,716 km (0.085 R)
• M2: 219,460 km (0.099 R)
• M3: 286,181 km (0.055 R)
• M4: 625,768 km (0.114 R)
• M5: 705,803 km (0.116 R)
• M6: 866,321 km (0.099 R)
• M7: 957,127 km (0.119 R)
• M8: 1,063,342 km (0.113 R)
• M9: 1,136,495 km (0.108 R)
• M10: 1,474,287 km (0.102 R)
• M11: 1,542,803 km (0.1 R)
• M12: 1,640,789 km (0.071 R)
• M13: 1,784,403 km (0.105 R)
• M14: 1,902,436 km (0.089 R)
• M15: 2,023,162 km (0.07 R)
• M16: 2,417,053 km (0.114 R)
• M17: 2,852,233 km (0.059 R)
• M18: 2,938,701 km (0.08 R)
• M19: 3,150,082 km (0.065 R)
• M20: 3,366,401 km (0.075 R)
• M21: 3,719,153 km (0.039 R)
• M22: 3,890,442 km (0.113 R)
• M23: 4,300,191 km (0.116 R)
• M24: 4,419,869 km (0.104 R)
• M25: 4,500,353 km (0.091 R)
• M26: 4,581,136 km (0.091 R)
• M27: 4,909,653 km (0.098 R)
• M28: 5,654,949 km (0.104 R)
• M29: 5,808,137 km (0.085 R)
• M30: 6,276,379 km (0.063 R)
• M31: 6,710,661 km (0.104 R)
• M32: 7,130,882 km (0.06 R)
• M33: 7,320,572 km (0.083 R)
• M34: 7,463,887 km (0.047 R)
• M35: 7,777,444 km (0.052 R)
• M36: 8,318,240 km (0.103 R)
• M37: 8,542,936 km (0.055 R)
• M38: 8,871,154 km (0.087 R)
• M39: 9,024,043 km (0.112 R)
• M40: 9,126,368 km (0.104 R)
• M41: 9,203,560 km (0.113 R)
• M42: 9,854,161 km (0.104 R)
• M43: 10,600,356 km (0.111 R)
• M44: 10,762,669 km (0.077 R)
• M45: 11,117,216 km (0.116 R)
• M46: 11,309,749 km (0.072 R)
• M47: 12,487,682 km (0.088 R)
• M48: 13,004,543 km (0.101 R)
• M49: 13,120,332 km (0.094 R)
• M50: 13,498,964 km (0.075 R)
• M51: 13,675,041 km (0.096 R)
• M52: 14,029,288 km (0.097 R)
• M53: 14,867,784 km (0.113 R)
• M54: 15,938,756 km (0.081 R)
• M55: 16,124,855 km (0.061 R)
• M56: 16,218,204 km (0.094 R)
• M57: 16,311,553 km (0.11 R)
• M58: 16,624,512 km (0.118 R)
• M59: 16,781,740 km (0.112 R)
• M60: 17,034,410 km (0.098 R)
• M61: 17,383,721 km (0.051 R)
• M62: 18,025,047 km (0.11 R)
• M63: 18,478,628 km (0.092 R)
• M64: 18,772,139 km (0.118 R)
• M65: 19,529,254 km (0.091 R)
• M66: 19,595,675 km (0.104 R)
• M67: 20,330,051 km (0.045 R)
• M68: 20,565,668 km (0.061 R)
• M69: 20,802,182 km (0.117 R)
• M70: 21,107,512 km (0.055 R)
• M71: 21,243,795 km (0.096 R)
• M72: 21,894,696 km (0.071 R)
• M73: 22,205,410 km (0.111 R)
• M74: 22,274,525 km (0.044 R)
• M75: 22,761,166 km (0.047 R)
• M76: 22,831,029 km (0.108 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 170

Radius: 10.4

Gravity: 1.57 G

Time & Orbit

Eccentricity (e): 0.019

Orbit Range: 2.96 AU - 3.08 AU

Year: 3443 Days

Day: 10 Hours

Environment

Temp: -201 °C

Axial Tilt: 34.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 50,082,124 km

• M1: 187,297 km (0.089 R)
• M2: 293,361 km (0.109 R)
• M3: 518,805 km (0.112 R)
• M4: 664,514 km (0.04 R)
• M5: 1,024,446 km (0.087 R)
• M6: 1,249,441 km (0.088 R)
• M7: 1,561,054 km (0.103 R)
• M8: 1,642,884 km (0.117 R)
• M9: 1,864,588 km (0.069 R)
• M10: 2,107,684 km (0.108 R)
• M11: 2,221,528 km (0.117 R)
• M12: 2,673,164 km (0.081 R)
• M13: 2,884,546 km (0.036 R)
• M14: 2,960,542 km (0.112 R)
• M15: 3,088,598 km (0.118 R)
• M16: 3,153,374 km (0.118 R)
• M17: 3,430,429 km (0.11 R)
• M18: 3,701,650 km (0.07 R)
• M19: 3,770,614 km (0.104 R)
• M20: 3,909,740 km (0.111 R)
• M21: 4,022,238 km (0.111 R)
• M22: 4,498,109 km (0.107 R)
• M23: 4,780,250 km (0.113 R)
• M24: 4,885,567 km (0.032 R)
• M25: 5,052,818 km (0.077 R)
• M26: 5,330,621 km (0.093 R)
• M27: 5,534,373 km (0.076 R)
• M28: 5,788,690 km (0.112 R)
• M29: 5,869,024 km (0.032 R)
• M30: 6,079,508 km (0.11 R)
• M31: 6,177,494 km (0.086 R)
• M32: 8,536,055 km (0.095 R)
• M33: 8,682,660 km (0.114 R)
• M34: 8,867,115 km (0.041 R)
• M35: 9,034,365 km (0.061 R)
• M36: 9,447,255 km (0.05 R)
• M37: 9,847,280 km (0.075 R)
• M38: 10,901,197 km (0.104 R)
• M39: 11,623,605 km (0.057 R)
• M40: 12,175,621 km (0.092 R)
• M41: 13,051,217 km (0.071 R)
• M42: 13,177,927 km (0.115 R)
• M43: 13,796,364 km (0.079 R)
• M44: 13,990,243 km (0.107 R)
• M45: 14,098,403 km (0.078 R)
• M46: 14,796,725 km (0.075 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.27 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 609.1

Radius: 9.2

Gravity: 7.2 G

Time & Orbit

Eccentricity (e): 0.17

Orbit Range: 4.37 AU - 6.17 AU

Year: 7936 Days

Day: 5.2 Hours

Environment

Temp: -223 °C

Axial Tilt: 45.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 50,082,124 km

• M1: 209,587 km (0.099 R)
• M2: 350,657 km (0.097 R)
• M3: 429,645 km (0.095 R)
• M4: 490,531 km (0.119 R)
• M5: 568,173 km (0.091 R)
• M6: 752,328 km (0.12 R)
• M7: 989,141 km (0.118 R)
• M8: 1,073,514 km (0.106 R)
• M9: 1,341,594 km (0.06 R)
• M10: 2,156,005 km (0.088 R)
• M11: 2,426,029 km (0.12 R)
• M12: 2,706,973 km (0.096 R)
• M13: 3,023,223 km (0.103 R)
• M14: 3,532,903 km (0.088 R)
• M15: 3,878,624 km (0.109 R)
• M16: 4,403,413 km (0.064 R)
• M17: 4,545,232 km (0.06 R)
• M18: 4,921,321 km (0.09 R)
• M19: 5,127,916 km (0.057 R)
• M20: 6,523,215 km (0.112 R)
• M21: 6,717,842 km (0.087 R)
• M22: 6,815,829 km (0.113 R)
• M23: 6,914,264 km (0.087 R)
• M24: 7,079,420 km (0.092 R)
• M25: 7,279,432 km (0.105 R)
• M26: 7,650,884 km (0.097 R)
• M27: 7,718,951 km (0.115 R)
• M28: 7,959,355 km (0.041 R)
• M29: 9,672,699 km (0.063 R)
• M30: 9,746,600 km (0.054 R)
• M31: 10,230,849 km (0.081 R)
• M32: 10,991,255 km (0.029 R)
• M33: 11,261,728 km (0.04 R)
• M34: 12,687,246 km (0.072 R)
• M35: 12,808,570 km (0.094 R)
• M36: 13,379,884 km (0.103 R)
• M37: 13,503,452 km (0.05 R)
• M38: 14,084,939 km (0.06 R)
• M39: 14,210,601 km (0.085 R)
• M40: 14,420,936 km (0.029 R)
• M41: 15,100,708 km (0.093 R)
• M42: 15,315,381 km (0.083 R)
• M43: 15,965,234 km (0.063 R)
• M44: 16,052,600 km (0.111 R)
• M45: 16,403,556 km (0.09 R)
• M46: 16,491,669 km (0.104 R)
• M47: 16,934,629 km (0.032 R)
• M48: 17,741,859 km (0.109 R)
• M49: 18,699,584 km (0.094 R)
• M50: 19,161,542 km (0.084 R)
• M51: 19,440,393 km (0.082 R)
• M52: 19,580,417 km (0.065 R)
• M53: 20,049,406 km (0.108 R)
• M54: 20,285,322 km (0.065 R)
• M55: 20,380,017 km (0.078 R)
• M56: 21,142,368 km (0.081 R)
• M57: 21,526,984 km (0.068 R)
• M58: 22,156,941 km (0.09 R)
• M59: 23,088,636 km (0.114 R)
• M60: 24,083,013 km (0.105 R)
• M61: 24,434,419 km (0.089 R)
• M62: 24,585,512 km (0.103 R)
• M63: 24,838,034 km (0.104 R)
• M64: 25,294,756 km (0.096 R)
• M65: 26,733,439 km (0.06 R)
• M66: 27,358,159 km (0.113 R)
• M67: 27,672,315 km (0.093 R)
• M68: 28,462,940 km (0.116 R)
• M69: 28,675,069 km (0.05 R)
• M70: 29,367,857 km (0.112 R)
• M71: 30,444,663 km (0.09 R)
• M72: 31,863,748 km (0.074 R)
• M73: 32,194,210 km (0.116 R)
• M74: 32,803,073 km (0.08 R)
• M75: 33,415,826 km (0.088 R)
• M76: 33,919,971 km (0.108 R)
• M77: 34,879,192 km (0.107 R)
• M78: 35,904,387 km (0.035 R)
• M79: 36,190,866 km (0.065 R)
• M80: 36,478,244 km (0.101 R)
• M81: 38,980,268 km (0.102 R)

Planet 7 - Ice Giant

Semi-Major Axis: 8.64 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 281.5

Radius: 5.5

Gravity: 9.31 G

Time & Orbit

Eccentricity (e): 0.16

Orbit Range: 7.26 AU - 10.02 AU

Year: 16660 Days

Day: 17 Hours

Environment

Temp: -232 °C

Axial Tilt: 5.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 50,082,124 km

• M1: 126,111 km (0.077 R)
• M2: 179,218 km (0.077 R)
• M3: 410,048 km (0.1 R)
• M4: 627,563 km (0.085 R)
• M5: 766,988 km (0.108 R)
• M6: 935,735 km (0.098 R)
• M7: 1,014,573 km (0.072 R)
• M8: 1,075,160 km (0.087 R)
• M9: 1,794,426 km (0.111 R)
• M10: 1,843,495 km (0.044 R)
• M11: 1,917,994 km (0.113 R)
• M12: 2,044,405 km (0.07 R)
• M13: 2,331,932 km (0.104 R)
• M14: 2,576,823 km (0.083 R)
• M15: 3,090,991 km (0.075 R)
• M16: 3,605,009 km (0.091 R)
• M17: 3,761,190 km (0.097 R)
• M18: 4,015,805 km (0.118 R)
• M19: 4,243,194 km (0.105 R)
• M20: 5,875,456 km (0.09 R)
• M21: 5,948,759 km (0.096 R)
• M22: 6,320,061 km (0.056 R)
• M23: 6,698,993 km (0.096 R)
• M24: 6,929,822 km (0.078 R)
• M25: 7,597,926 km (0.105 R)
• M26: 7,637,869 km (0.084 R)
• M27: 8,327,665 km (0.114 R)
• M28: 9,249,487 km (0.052 R)
• M29: 9,334,907 km (0.027 R)
• M30: 9,463,412 km (0.1 R)
• M31: 10,115,210 km (0.102 R)
• M32: 10,513,290 km (0.101 R)
• M33: 11,006,663 km (0.071 R)
• M34: 11,097,170 km (0.109 R)
• M35: 11,278,931 km (0.085 R)
• M36: 12,016,000 km (0.117 R)
• M37: 12,109,200 km (0.092 R)
• M38: 12,531,664 km (0.109 R)
• M39: 12,863,622 km (0.058 R)
• M40: 13,390,954 km (0.119 R)
• M41: 13,487,744 km (0.091 R)
• M42: 13,779,011 km (0.119 R)
• M43: 14,715,344 km (0.096 R)
• M44: 14,815,126 km (0.111 R)
• M45: 15,519,582 km (0.091 R)
• M46: 15,672,023 km (0.083 R)
• M47: 16,700,657 km (0.098 R)
• M48: 16,856,838 km (0.114 R)
• M49: 17,170,544 km (0.099 R)
• M50: 18,444,969 km (0.11 R)
• M51: 18,714,394 km (0.119 R)
• M52: 19,639,657 km (0.11 R)
• M53: 20,246,426 km (0.112 R)
• M54: 20,915,278 km (0.064 R)
• M55: 21,875,098 km (0.069 R)
• M56: 23,138,602 km (0.067 R)
• M57: 23,254,540 km (0.055 R)
• M58: 23,720,687 km (0.072 R)
• M59: 23,779,180 km (0.035 R)
• M60: 24,013,450 km (0.089 R)
• M61: 24,189,826 km (0.083 R)
• M62: 24,899,219 km (0.096 R)
• M63: 25,018,150 km (0.103 R)
• M64: 25,375,988 km (0.098 R)
• M65: 25,615,494 km (0.111 R)
• M66: 26,946,017 km (0.066 R)
• M67: 28,113,180 km (0.11 R)
• M68: 28,671,778 km (0.105 R)
• M69: 28,796,393 km (0.106 R)
• M70: 29,422,311 km (0.062 R)
• M71: 29,610,954 km (0.088 R)
• M72: 32,488,319 km (0.09 R)
• M73: 33,861,328 km (0.099 R)
• M74: 34,587,925 km (0.11 R)
• M75: 35,186,466 km (0.114 R)
• M76: 36,934,218 km (0.112 R)
• M77: 37,818,791 km (0.099 R)
• M78: 39,054,918 km (0.1 R)
• M79: 39,124,032 km (0.091 R)
• M80: 40,723,682 km (0.111 R)
• M81: 41,496,205 km (0.106 R)
• M82: 43,127,271 km (0.102 R)
• M83: 43,699,483 km (0.095 R)
• M84: 44,346,194 km (0.073 R)
• M85: 44,779,131 km (0.101 R)
• M86: 45,140,858 km (0.106 R)
• M87: 49,259,138 km (0.107 R)
• M88: 49,408,437 km (0.048 R)
• M89: 49,782,282 km (0.084 R)
• M90: 50,007,127 km (0.107 R)

Kuiper Belt

Range: 30 - 57 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 545 - 17,708 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit