🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.54 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.18

Radius: 1.77

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.203

Orbit Range: 0.43 AU - 0.65 AU

Year: 149 Days

Day: 23.4 Hours

Environment

Temp: 206 °C

Axial Tilt: 19.9 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 111,311,980 km

• M1: 147,653 km (0.044 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.64 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.65

Radius: 0.84

Gravity: 0.92 G

Time & Orbit

Eccentricity (e): 0.189

Orbit Range: 0.52 AU - 0.76 AU

Year: 192 Days

Day: 26.7 Hours

Environment

Temp: 139 °C

Axial Tilt: 30 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (2)

Outer Limit: 111,311,980 km

• M1: 29,022 km (0.064 R)
• M2: 248,781 km (0.108 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.48 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.61

Radius: 1.21

Gravity: 1.1 G

Time & Orbit

Eccentricity (e): 0.032

Orbit Range: 1.43 AU - 1.53 AU

Year: 675 Days

Day: 40.5 Hours

Environment

Temp: -48 °C

Axial Tilt: 19.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 111,311,980 km

• M1: 923,617 km (0.113 R)

Planet 4 - Terrestrial

Semi-Major Axis: 1.76 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.98

Radius: 0.99

Gravity: 1 G

Time & Orbit

Eccentricity (e): 0.006

Orbit Range: 1.75 AU - 1.77 AU

Year: 875 Days

Day: 15.3 Hours

Environment

Temp: -61 °C

Axial Tilt: 19.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 1.77 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.95

Radius: 1.9

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.245

Orbit Range: 1.34 AU - 2.2 AU

Year: 882 Days

Day: 15.2 Hours

Environment

Temp: -65 °C

Axial Tilt: 14.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 4.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 148

Radius: 11.2

Gravity: 1.18 G

Time & Orbit

Eccentricity (e): 0.047

Orbit Range: 4.49 AU - 4.93 AU

Year: 3831 Days

Day: 13.3 Hours

Environment

Temp: -135 °C

Axial Tilt: 35.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (48)

Outer Limit: 111,311,980 km

• M1: 205,996 km (0.061 R)
• M2: 360,232 km (0.053 R)
• M3: 586,424 km (0.115 R)
• M4: 695,181 km (0.074 R)
• M5: 952,041 km (0.11 R)
• M6: 1,038,808 km (0.091 R)
• M7: 1,544,598 km (0.066 R)
• M8: 1,950,906 km (0.118 R)
• M9: 2,609,136 km (0.114 R)
• M10: 2,937,055 km (0.034 R)
• M11: 3,040,726 km (0.104 R)
• M12: 3,119,265 km (0.109 R)
• M13: 3,372,534 km (0.092 R)
• M14: 3,577,184 km (0.083 R)
• M15: 3,814,297 km (0.118 R)
• M16: 4,013,412 km (0.045 R)
• M17: 4,245,288 km (0.049 R)
• M18: 4,706,947 km (0.091 R)
• M19: 4,874,796 km (0.105 R)
• M20: 5,184,913 km (0.113 R)
• M21: 5,263,451 km (0.115 R)
• M22: 5,597,653 km (0.094 R)
• M23: 5,759,368 km (0.118 R)
• M24: 6,004,709 km (0.028 R)
• M25: 6,590,833 km (0.101 R)
• M26: 6,933,861 km (0.086 R)
• M27: 7,055,335 km (0.086 R)
• M28: 7,637,719 km (0.057 R)
• M29: 7,781,184 km (0.065 R)
• M30: 7,943,647 km (0.084 R)
• M31: 8,162,209 km (0.098 R)
• M32: 8,660,969 km (0.104 R)
• M33: 9,456,680 km (0.114 R)
• M34: 9,591,467 km (0.117 R)
• M35: 9,882,735 km (0.08 R)
• M36: 10,275,579 km (0.066 R)
• M37: 11,015,938 km (0.098 R)
• M38: 11,198,597 km (0.031 R)
• M39: 11,320,968 km (0.082 R)
• M40: 11,649,336 km (0.034 R)
• M41: 12,336,738 km (0.104 R)
• M42: 12,484,242 km (0.04 R)
• M43: 12,973,127 km (0.075 R)
• M44: 14,013,281 km (0.1 R)
• M45: 14,343,893 km (0.034 R)
• M46: 14,476,885 km (0.048 R)
• M47: 14,699,487 km (0.096 R)
• M48: 14,967,865 km (0.113 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 719.5

Radius: 10.9

Gravity: 6.06 G

Time & Orbit

Eccentricity (e): 0.153

Orbit Range: 4.82 AU - 6.56 AU

Year: 5086 Days

Day: 8.1 Hours

Environment

Temp: -149 °C

Axial Tilt: 14.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 111,311,980 km

• M1: 186,698 km (0.065 R)
• M2: 265,087 km (0.033 R)
• M3: 401,670 km (0.111 R)
• M4: 470,784 km (0.086 R)
• M5: 888,163 km (0.108 R)
• M6: 1,651,860 km (0.116 R)
• M7: 1,913,357 km (0.054 R)
• M8: 1,985,463 km (0.109 R)
• M9: 2,095,268 km (0.103 R)
• M10: 2,188,467 km (0.093 R)
• M11: 2,264,014 km (0.104 R)
• M12: 2,615,120 km (0.066 R)
• M13: 2,776,836 km (0.116 R)
• M14: 3,025,617 km (0.081 R)
• M15: 3,434,618 km (0.114 R)
• M16: 3,589,751 km (0.116 R)
• M17: 3,792,605 km (0.084 R)
• M18: 3,907,048 km (0.087 R)
• M19: 4,376,187 km (0.08 R)
• M20: 4,496,314 km (0.089 R)
• M21: 4,987,892 km (0.114 R)
• M22: 5,652,556 km (0.078 R)
• M23: 5,862,741 km (0.03 R)
• M24: 6,508,704 km (0.077 R)
• M25: 7,007,912 km (0.08 R)
• M26: 7,319,225 km (0.077 R)
• M27: 7,635,176 km (0.113 R)
• M28: 7,926,144 km (0.066 R)
• M29: 8,459,161 km (0.074 R)
• M30: 8,699,864 km (0.089 R)
• M31: 8,973,329 km (0.114 R)
• M32: 9,280,603 km (0.09 R)
• M33: 9,497,670 km (0.097 R)
• M34: 9,653,850 km (0.12 R)
• M35: 9,905,473 km (0.061 R)
• M36: 10,318,812 km (0.114 R)
• M37: 10,511,644 km (0.073 R)
• M38: 10,705,523 km (0.064 R)
• M39: 10,802,911 km (0.112 R)
• M40: 11,693,018 km (0.089 R)
• M41: 11,860,418 km (0.115 R)
• M42: 12,299,488 km (0.119 R)
• M43: 12,778,201 km (0.119 R)
• M44: 13,789,333 km (0.069 R)
• M45: 14,609,429 km (0.11 R)
• M46: 14,681,535 km (0.111 R)
• M47: 15,298,925 km (0.085 R)
• M48: 16,409,091 km (0.077 R)
• M49: 16,671,935 km (0.089 R)
• M50: 17,392,099 km (0.037 R)
• M51: 17,583,435 km (0.089 R)
• M52: 17,698,475 km (0.116 R)
• M53: 18,200,077 km (0.103 R)
• M54: 18,511,091 km (0.102 R)
• M55: 19,256,836 km (0.067 R)
• M56: 19,454,605 km (0.073 R)
• M57: 19,613,478 km (0.116 R)
• M58: 19,892,328 km (0.071 R)
• M59: 20,413,826 km (0.044 R)
• M60: 23,172,112 km (0.067 R)
• M61: 23,678,501 km (0.039 R)
• M62: 23,805,659 km (0.085 R)
• M63: 25,305,677 km (0.114 R)
• M64: 25,435,677 km (0.074 R)
• M65: 25,522,444 km (0.099 R)
• M66: 26,089,121 km (0.092 R)
• M67: 26,264,300 km (0.1 R)
• M68: 26,571,723 km (0.119 R)
• M69: 26,924,625 km (0.086 R)
• M70: 27,101,599 km (0.097 R)
• M71: 27,456,744 km (0.077 R)
• M72: 28,757,348 km (0.058 R)
• M73: 29,165,002 km (0.107 R)
• M74: 29,346,764 km (0.083 R)
• M75: 29,757,260 km (0.068 R)
• M76: 30,676,240 km (0.117 R)
• M77: 31,000,120 km (0.106 R)

Planet 8 - Gas Giant

Semi-Major Axis: 9.24 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 106.7

Radius: 14.2

Gravity: 0.53 G

Time & Orbit

Eccentricity (e): 0.092

Orbit Range: 8.39 AU - 10.09 AU

Year: 10525 Days

Day: 10.7 Hours

Environment

Temp: -180 °C

Axial Tilt: 41.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 111,311,980 km

• M1: 235,317 km (0.118 R)
• M2: 342,729 km (0.093 R)
• M3: 473,028 km (0.033 R)
• M4: 721,062 km (0.055 R)
• M5: 833,559 km (0.091 R)
• M6: 928,404 km (0.083 R)
• M7: 1,237,474 km (0.064 R)
• M8: 1,565,243 km (0.056 R)
• M9: 1,701,227 km (0.08 R)
• M10: 1,841,550 km (0.073 R)
• M11: 2,002,068 km (0.057 R)
• M12: 2,234,843 km (0.081 R)
• M13: 2,389,377 km (0.083 R)
• M14: 2,893,372 km (0.12 R)
• M15: 3,043,718 km (0.09 R)
• M16: 3,254,502 km (0.097 R)
• M17: 3,530,061 km (0.092 R)
• M18: 3,711,374 km (0.108 R)
• M19: 3,916,472 km (0.062 R)
• M20: 4,020,443 km (0.074 R)
• M21: 4,359,432 km (0.099 R)
• M22: 5,020,355 km (0.11 R)
• M23: 5,689,207 km (0.101 R)
• M24: 6,191,257 km (0.1 R)
• M25: 6,832,733 km (0.067 R)
• M26: 7,443,840 km (0.11 R)
• M27: 7,573,392 km (0.094 R)
• M28: 8,232,371 km (0.075 R)
• M29: 9,888,419 km (0.115 R)
• M30: 10,376,108 km (0.025 R)
• M31: 10,725,120 km (0.063 R)
• M32: 11,078,171 km (0.064 R)
• M33: 11,375,123 km (0.089 R)
• M34: 11,584,710 km (0.074 R)
• M35: 12,098,728 km (0.032 R)
• M36: 12,251,467 km (0.077 R)
• M37: 12,404,805 km (0.114 R)
• M38: 12,868,409 km (0.104 R)
• M39: 12,993,173 km (0.072 R)
• M40: 13,590,667 km (0.065 R)
• M41: 13,717,526 km (0.096 R)
• M42: 13,908,712 km (0.114 R)
• M43: 15,337,522 km (0.113 R)
• M44: 16,237,502 km (0.114 R)
• M45: 16,812,856 km (0.096 R)
• M46: 17,532,870 km (0.046 R)
• M47: 17,983,609 km (0.107 R)
• M48: 18,297,914 km (0.109 R)
• M49: 18,508,548 km (0.067 R)
• M50: 18,719,930 km (0.093 R)
• M51: 19,109,632 km (0.112 R)
• M52: 19,287,504 km (0.102 R)
• M53: 19,430,370 km (0.102 R)
• M54: 19,573,535 km (0.111 R)
• M55: 20,041,178 km (0.092 R)
• M56: 20,512,561 km (0.11 R)
• M57: 21,097,788 km (0.083 R)
• M58: 21,874,201 km (0.067 R)
• M59: 22,097,700 km (0.06 R)
• M60: 22,622,340 km (0.119 R)
• M61: 22,923,929 km (0.084 R)
• M62: 23,492,999 km (0.073 R)
• M63: 23,683,886 km (0.099 R)
• M64: 23,836,775 km (0.033 R)
• M65: 24,567,860 km (0.07 R)
• M66: 24,800,335 km (0.053 R)
• M67: 24,955,767 km (0.038 R)
• M68: 25,345,470 km (0.089 R)
• M69: 26,170,652 km (0.08 R)
• M70: 26,368,420 km (0.105 R)

Planet 9 - Ice Giant

Semi-Major Axis: 13.27 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 933.2

Radius: 7.2

Gravity: 18 G

Time & Orbit

Eccentricity (e): 0.023

Orbit Range: 12.96 AU - 13.58 AU

Year: 18115 Days

Day: 15.8 Hours

Environment

Temp: -190 °C

Axial Tilt: 5.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 111,311,980 km

• M1: 96,640 km (0.089 R)
• M2: 893,249 km (0.096 R)
• M3: 1,774,829 km (0.11 R)
• M4: 1,907,822 km (0.096 R)
• M5: 2,078,662 km (0.115 R)
• M6: 2,290,493 km (0.113 R)
• M7: 2,811,542 km (0.118 R)
• M8: 3,165,491 km (0.101 R)
• M9: 3,368,196 km (0.089 R)
• M10: 3,533,502 km (0.117 R)
• M11: 3,617,127 km (0.054 R)
• M12: 3,743,836 km (0.034 R)
• M13: 4,045,276 km (0.117 R)
• M14: 4,221,203 km (0.098 R)
• M15: 4,399,524 km (0.069 R)
• M16: 4,489,582 km (0.079 R)
• M17: 4,717,569 km (0.063 R)
• M18: 7,250,261 km (0.083 R)
• M19: 7,356,774 km (0.095 R)
• M20: 7,463,887 km (0.118 R)
• M21: 7,897,720 km (0.059 R)
• M22: 8,451,233 km (0.108 R)
• M23: 10,305,648 km (0.116 R)
• M24: 10,546,051 km (0.09 R)
• M25: 11,339,967 km (0.114 R)
• M26: 11,525,918 km (0.116 R)
• M27: 12,534,656 km (0.072 R)
• M28: 12,662,712 km (0.113 R)
• M29: 13,309,723 km (0.096 R)
• M30: 13,374,947 km (0.093 R)
• M31: 13,901,083 km (0.083 R)
• M32: 14,033,627 km (0.12 R)
• M33: 14,500,970 km (0.11 R)
• M34: 15,177,602 km (0.071 R)
• M35: 15,795,291 km (0.114 R)
• M36: 16,842,775 km (0.067 R)
• M37: 17,984,806 km (0.112 R)
• M38: 18,492,391 km (0.115 R)
• M39: 20,042,824 km (0.039 R)
• M40: 20,795,750 km (0.058 R)
• M41: 21,404,763 km (0.099 R)
• M42: 22,096,802 km (0.105 R)
• M43: 23,187,969 km (0.09 R)
• M44: 23,740,135 km (0.059 R)
• M45: 24,057,582 km (0.049 R)
• M46: 24,456,409 km (0.053 R)
• M47: 24,857,332 km (0.031 R)
• M48: 25,179,715 km (0.088 R)
• M49: 25,422,363 km (0.09 R)
• M50: 25,828,671 km (0.118 R)
• M51: 26,400,883 km (0.096 R)
• M52: 26,977,283 km (0.065 R)
• M53: 27,308,643 km (0.096 R)
• M54: 27,891,476 km (0.115 R)
• M55: 28,394,424 km (0.105 R)
• M56: 28,815,841 km (0.049 R)
• M57: 30,435,986 km (0.062 R)
• M58: 31,300,662 km (0.054 R)
• M59: 31,998,087 km (0.113 R)
• M60: 32,524,522 km (0.113 R)
• M61: 34,389,409 km (0.076 R)
• M62: 35,018,767 km (0.11 R)
• M63: 35,652,015 km (0.073 R)
• M64: 37,851,253 km (0.114 R)
• M65: 40,377,662 km (0.116 R)
• M66: 41,517,747 km (0.105 R)
• M67: 47,774,828 km (0.109 R)
• M68: 50,501,249 km (0.093 R)
• M69: 50,807,326 km (0.102 R)
• M70: 51,626,375 km (0.071 R)
• M71: 51,934,696 km (0.083 R)
• M72: 53,173,965 km (0.082 R)
• M73: 53,277,636 km (0.117 R)
• M74: 54,005,579 km (0.107 R)
• M75: 54,422,957 km (0.081 R)
• M76: 55,576,357 km (0.055 R)
• M77: 55,786,991 km (0.104 R)
• M78: 63,652,248 km (0.116 R)
• M79: 64,313,920 km (0.083 R)
• M80: 64,535,025 km (0.091 R)
• M81: 65,532,993 km (0.075 R)
• M82: 65,755,445 km (0.06 R)
• M83: 66,759,695 km (0.036 R)
• M84: 68,219,172 km (0.079 R)
• M85: 69,462,331 km (0.055 R)
• M86: 73,236,535 km (0.076 R)
• M87: 73,467,365 km (0.087 R)
• M88: 74,625,252 km (0.052 R)
• M89: 76,139,631 km (0.118 R)
• M90: 76,724,858 km (0.077 R)
• M91: 78,017,384 km (0.046 R)
• M92: 78,489,216 km (0.105 R)
• M93: 78,961,945 km (0.074 R)

Planet 10 - Ice Giant

Semi-Major Axis: 18.46 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 971.1

Radius: 3.3

Gravity: 89.17 G

Time & Orbit

Eccentricity (e): 0.017

Orbit Range: 18.15 AU - 18.77 AU

Year: 29722 Days

Day: 21.5 Hours

Environment

Temp: -203 °C

Axial Tilt: 38 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 111,311,980 km

• M1: 619,186 km (0.081 R)
• M2: 648,357 km (0.118 R)
• M3: 801,097 km (0.088 R)
• M4: 931,247 km (0.047 R)
• M5: 964,757 km (0.039 R)
• M6: 1,103,284 km (0.06 R)
• M7: 1,398,740 km (0.11 R)
• M8: 1,476,232 km (0.118 R)
• M9: 2,235,740 km (0.098 R)
• M10: 2,896,364 km (0.109 R)
• M11: 3,826,863 km (0.072 R)
• M12: 4,211,778 km (0.085 R)
• M13: 4,608,811 km (0.074 R)
• M14: 4,724,450 km (0.109 R)
• M15: 5,683,373 km (0.107 R)
• M16: 6,184,825 km (0.056 R)
• M17: 6,634,965 km (0.111 R)
• M18: 7,095,726 km (0.092 R)
• M19: 9,696,336 km (0.071 R)
• M20: 9,770,387 km (0.085 R)
• M21: 10,143,035 km (0.104 R)
• M22: 13,205,602 km (0.103 R)
• M23: 15,392,424 km (0.091 R)
• M24: 16,262,934 km (0.074 R)
• M25: 16,615,536 km (0.11 R)
• M26: 18,051,227 km (0.108 R)
• M27: 19,432,614 km (0.12 R)
• M28: 20,657,222 km (0.082 R)
• M29: 21,038,996 km (0.059 R)
• M30: 21,134,738 km (0.036 R)
• M31: 22,393,305 km (0.107 R)
• M32: 23,975,452 km (0.112 R)
• M33: 25,695,529 km (0.081 R)
• M34: 26,106,025 km (0.074 R)
• M35: 26,725,809 km (0.103 R)
• M36: 27,454,949 km (0.112 R)
• M37: 28,296,288 km (0.05 R)
• M38: 28,507,819 km (0.077 R)
• M39: 29,359,779 km (0.107 R)
• M40: 29,574,003 km (0.114 R)
• M41: 29,896,386 km (0.048 R)
• M42: 30,004,097 km (0.096 R)
• M43: 30,544,594 km (0.107 R)
• M44: 30,761,661 km (0.099 R)
• M45: 30,979,325 km (0.112 R)
• M46: 32,960,749 km (0.112 R)
• M47: 33,742,398 km (0.083 R)
• M48: 35,437,492 km (0.112 R)
• M49: 35,779,921 km (0.061 R)
• M50: 36,928,982 km (0.095 R)
• M51: 38,440,818 km (0.114 R)
• M52: 40,448,272 km (0.072 R)
• M53: 40,567,352 km (0.111 R)
• M54: 47,046,137 km (0.053 R)
• M55: 47,422,226 km (0.118 R)
• M56: 47,547,888 km (0.104 R)
• M57: 49,064,062 km (0.113 R)
• M58: 51,755,029 km (0.114 R)
• M59: 54,888,805 km (0.079 R)
• M60: 56,744,866 km (0.062 R)
• M61: 57,145,339 km (0.026 R)
• M62: 57,680,750 km (0.076 R)
• M63: 57,948,979 km (0.118 R)
• M64: 59,296,706 km (0.083 R)
• M65: 63,816,806 km (0.092 R)
• M66: 65,907,736 km (0.119 R)
• M67: 66,609,649 km (0.037 R)
• M68: 66,891,042 km (0.082 R)
• M69: 67,596,546 km (0.12 R)
• M70: 69,014,734 km (0.096 R)
• M71: 69,157,151 km (0.119 R)
• M72: 69,299,568 km (0.085 R)
• M73: 70,873,038 km (0.094 R)
• M74: 72,892,610 km (0.098 R)
• M75: 73,473,049 km (0.097 R)
• M76: 74,200,843 km (0.078 R)
• M77: 74,931,030 km (0.079 R)
• M78: 75,663,461 km (0.07 R)
• M79: 75,810,367 km (0.099 R)
• M80: 76,545,640 km (0.11 R)
• M81: 78,914,822 km (0.041 R)
• M82: 83,269,616 km (0.066 R)
• M83: 83,572,850 km (0.038 R)
• M84: 87,086,007 km (0.082 R)
• M85: 88,628,361 km (0.057 R)
• M86: 92,994,824 km (0.066 R)
• M87: 93,781,858 km (0.039 R)
• M88: 94,255,186 km (0.098 R)
• M89: 95,204,235 km (0.114 R)
• M90: 95,997,402 km (0.109 R)
• M91: 96,156,425 km (0.059 R)
• M92: 96,792,964 km (0.09 R)
• M93: 103,397,411 km (0.1 R)
• M94: 105,193,932 km (0.069 R)
• M95: 108,652,186 km (0.055 R)
• M96: 111,312,036 km (0.074 R)

Kuiper Belt

Range: 30 - 56 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 469 - 15,879 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit