🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.3 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.7

Radius: 1.69

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.231

Orbit Range: 1 AU - 1.6 AU

Year: 555 Days

Day: 40.3 Hours

Environment

Temp: -37 °C

Axial Tilt: 6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 24,219,854 km

• M1: 658,979 km (0.076 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.45

Radius: 1.82

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.209

Orbit Range: 1.27 AU - 1.93 AU

Year: 758 Days

Day: 18.3 Hours

Environment

Temp: -55 °C

Axial Tilt: 45 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 24,219,854 km

• M1: 1,405,622 km (0.119 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.78 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.84

Radius: 1.88

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.127

Orbit Range: 1.55 AU - 2.01 AU

Year: 890 Days

Day: 39.7 Hours

Environment

Temp: -59 °C

Axial Tilt: 39.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 24,219,854 km

• M1: 65,673 km (0.107 R)
• M2: 938,727 km (0.09 R)

Planet 4 - Terrestrial

Semi-Major Axis: 2.2 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.24

Radius: 1.09

Gravity: 1.04 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 1.74 AU - 2.66 AU

Year: 1223 Days

Day: 41 Hours

Environment

Temp: -90 °C

Axial Tilt: 174.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 24,219,854 km

• M1: 303,235 km (0.116 R)

Planet 5 - Terrestrial

Semi-Major Axis: 4.22 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.37

Radius: 1.41

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.114

Orbit Range: 3.74 AU - 4.7 AU

Year: 3249 Days

Day: 31.8 Hours

Environment

Temp: -133 °C

Axial Tilt: 2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 5.77 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 6 - Gas Giant

Semi-Major Axis: 7.31 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 170.1

Radius: 14.4

Gravity: 0.82 G

Time & Orbit

Eccentricity (e): 0.04

Orbit Range: 7.02 AU - 7.6 AU

Year: 7406 Days

Day: 13 Hours

Environment

Temp: -159 °C

Axial Tilt: 14 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 24,219,854 km

• M1: 183,108 km (0.105 R)
• M2: 374,892 km (0.112 R)
• M3: 486,343 km (0.081 R)
• M4: 613,202 km (0.06 R)
• M5: 712,385 km (0.088 R)
• M6: 884,722 km (0.043 R)
• M7: 1,313,469 km (0.074 R)
• M8: 1,601,445 km (0.091 R)
• M9: 1,956,142 km (0.046 R)
• M10: 2,401,943 km (0.113 R)
• M11: 2,585,949 km (0.118 R)
• M12: 2,879,759 km (0.03 R)
• M13: 3,093,834 km (0.041 R)
• M14: 3,313,294 km (0.084 R)
• M15: 3,556,989 km (0.099 R)
• M16: 3,884,608 km (0.067 R)
• M17: 4,384,564 km (0.058 R)
• M18: 4,528,328 km (0.116 R)
• M19: 4,694,381 km (0.082 R)
• M20: 4,883,922 km (0.1 R)
• M21: 5,011,678 km (0.075 R)
• M22: 5,140,482 km (0.061 R)
• M23: 5,445,512 km (0.072 R)
• M24: 5,823,995 km (0.042 R)
• M25: 5,936,941 km (0.058 R)
• M26: 6,234,192 km (0.097 R)
• M27: 6,466,218 km (0.099 R)
• M28: 6,653,814 km (0.029 R)
• M29: 6,771,996 km (0.033 R)
• M30: 7,447,132 km (0.11 R)
• M31: 8,017,847 km (0.078 R)
• M32: 8,219,655 km (0.056 R)
• M33: 8,423,258 km (0.09 R)
• M34: 9,070,119 km (0.096 R)
• M35: 9,227,795 km (0.075 R)
• M36: 9,840,698 km (0.11 R)
• M37: 10,002,712 km (0.098 R)
• M38: 10,193,001 km (0.08 R)
• M39: 10,494,291 km (0.076 R)
• M40: 10,687,721 km (0.059 R)
• M41: 10,993,798 km (0.073 R)
• M42: 11,558,081 km (0.096 R)
• M43: 12,451,180 km (0.12 R)
• M44: 12,685,301 km (0.115 R)
• M45: 13,277,110 km (0.111 R)
• M46: 13,486,248 km (0.109 R)
• M47: 13,666,513 km (0.077 R)
• M48: 13,847,527 km (0.065 R)
• M49: 14,672,110 km (0.049 R)
• M50: 14,795,678 km (0.099 R)
• M51: 14,888,578 km (0.041 R)
• M52: 14,981,628 km (0.056 R)
• M53: 15,105,944 km (0.102 R)
• M54: 15,512,701 km (0.118 R)
• M55: 15,891,183 km (0.115 R)
• M56: 16,529,069 km (0.071 R)
• M57: 16,625,410 km (0.108 R)
• M58: 16,818,840 km (0.039 R)
• M59: 17,240,257 km (0.094 R)
• M60: 17,370,706 km (0.06 R)
• M61: 17,895,645 km (0.09 R)
• M62: 18,060,652 km (0.112 R)
• M63: 18,392,460 km (0.086 R)
• M64: 18,927,422 km (0.099 R)
• M65: 19,095,719 km (0.06 R)
• M66: 20,012,904 km (0.046 R)
• M67: 20,115,678 km (0.038 R)
• M68: 20,459,603 km (0.068 R)
• M69: 20,909,594 km (0.077 R)
• M70: 21,014,013 km (0.116 R)
• M71: 21,503,048 km (0.05 R)
• M72: 22,314,766 km (0.088 R)

Planet 7 - Gas Giant

Semi-Major Axis: 11.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 891.2

Radius: 13.6

Gravity: 4.82 G

Time & Orbit

Eccentricity (e): 0.151

Orbit Range: 9.38 AU - 12.72 AU

Year: 13765 Days

Day: 10.5 Hours

Environment

Temp: -183 °C

Axial Tilt: 14 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 24,219,854 km

• M1: 224,247 km (0.091 R)
• M2: 312,211 km (0.067 R)
• M3: 610,210 km (0.119 R)
• M4: 744,997 km (0.1 R)
• M5: 1,142,180 km (0.086 R)
• M6: 1,576,014 km (0.069 R)
• M7: 2,120,101 km (0.076 R)
• M8: 2,786,859 km (0.117 R)
• M9: 3,161,302 km (0.095 R)
• M10: 3,372,534 km (0.099 R)
• M11: 3,588,404 km (0.072 R)
• M12: 4,225,093 km (0.048 R)
• M13: 4,616,141 km (0.033 R)
• M14: 4,978,318 km (0.093 R)
• M15: 5,308,032 km (0.111 R)
• M16: 5,475,581 km (0.045 R)
• M17: 6,562,410 km (0.079 R)
• M18: 8,000,793 km (0.048 R)
• M19: 8,145,155 km (0.049 R)
• M20: 8,681,613 km (0.064 R)
• M21: 8,879,531 km (0.115 R)
• M22: 9,129,210 km (0.038 R)
• M23: 9,381,133 km (0.116 R)
• M24: 10,675,005 km (0.117 R)
• M25: 11,047,354 km (0.049 R)
• M26: 11,859,670 km (0.118 R)
• M27: 12,467,487 km (0.115 R)
• M28: 12,747,235 km (0.073 R)
• M29: 14,645,033 km (0.1 R)
• M30: 15,237,441 km (0.07 R)
• M31: 16,691,233 km (0.081 R)
• M32: 16,814,352 km (0.072 R)
• M33: 17,873,355 km (0.074 R)
• M34: 18,825,546 km (0.104 R)
• M35: 19,018,078 km (0.07 R)
• M36: 19,275,686 km (0.086 R)
• M37: 21,713,084 km (0.056 R)
• M38: 22,049,829 km (0.054 R)
• M39: 22,524,203 km (0.062 R)
• M40: 22,865,287 km (0.064 R)
• M41: 23,207,866 km (0.082 R)
• M42: 23,483,275 km (0.11 R)
• M43: 24,106,799 km (0.119 R)
• M44: 24,246,075 km (0.118 R)
• M45: 24,806,020 km (0.104 R)
• M46: 26,224,357 km (0.106 R)
• M47: 27,378,056 km (0.104 R)
• M48: 27,669,024 km (0.107 R)
• M49: 28,621,962 km (0.057 R)
• M50: 29,213,622 km (0.059 R)
• M51: 31,088,681 km (0.086 R)
• M52: 32,848,102 km (0.104 R)
• M53: 33,002,487 km (0.035 R)
• M54: 33,467,587 km (0.037 R)
• M55: 35,033,129 km (0.045 R)
• M56: 36,863,010 km (0.12 R)
• M57: 37,184,346 km (0.06 R)
• M58: 37,506,729 km (0.082 R)
• M59: 39,460,178 km (0.075 R)
• M60: 39,624,437 km (0.031 R)
• M61: 42,788,881 km (0.115 R)
• M62: 43,126,673 km (0.106 R)
• M63: 44,145,434 km (0.105 R)
• M64: 44,572,237 km (0.085 R)
• M65: 44,657,807 km (0.083 R)
• M66: 44,828,947 km (0.1 R)
• M67: 45,086,255 km (0.074 R)
• M68: 46,033,658 km (0.108 R)
• M69: 48,738,837 km (0.052 R)
• M70: 51,495,177 km (0.043 R)
• M71: 51,584,936 km (0.102 R)
• M72: 53,300,225 km (0.098 R)
• M73: 53,572,793 km (0.103 R)
• M74: 55,125,918 km (0.083 R)
• M75: 55,493,480 km (0.101 R)
• M76: 55,954,241 km (0.091 R)
• M77: 56,138,845 km (0.11 R)
• M78: 56,231,147 km (0.092 R)
• M79: 56,601,252 km (0.053 R)
• M80: 56,693,853 km (0.037 R)
• M81: 57,902,753 km (0.097 R)
• M82: 58,089,452 km (0.08 R)
• M83: 58,276,449 km (0.097 R)
• M84: 59,402,322 km (0.091 R)
• M85: 59,684,913 km (0.115 R)
• M86: 61,294,586 km (0.025 R)
• M87: 63,398,979 km (0.111 R)
• M88: 63,977,025 km (0.065 R)

Planet 8 - Ice Giant

Semi-Major Axis: 12.98 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 818.8

Radius: 6.6

Gravity: 18.8 G

Time & Orbit

Eccentricity (e): 0.025

Orbit Range: 12.66 AU - 13.3 AU

Year: 17524 Days

Day: 20.2 Hours

Environment

Temp: -191 °C

Axial Tilt: 33.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 24,219,854 km

• M1: 94,247 km (0.069 R)
• M2: 145,110 km (0.044 R)
• M3: 191,485 km (0.112 R)
• M4: 409,749 km (0.093 R)
• M5: 858,841 km (0.078 R)
• M6: 1,140,534 km (0.111 R)
• M7: 1,306,139 km (0.047 R)
• M8: 1,479,373 km (0.107 R)
• M9: 1,599,052 km (0.034 R)
• M10: 1,880,296 km (0.113 R)
• M11: 2,417,651 km (0.104 R)
• M12: 3,000,185 km (0.115 R)
• M13: 3,229,369 km (0.057 R)
• M14: 3,424,894 km (0.113 R)
• M15: 3,504,181 km (0.105 R)
• M16: 3,705,090 km (0.098 R)
• M17: 3,909,740 km (0.084 R)
• M18: 3,992,618 km (0.116 R)
• M19: 4,202,503 km (0.116 R)
• M20: 4,415,980 km (0.071 R)
• M21: 4,502,298 km (0.095 R)
• M22: 4,676,729 km (0.117 R)
• M23: 4,809,123 km (0.093 R)
• M24: 5,628,769 km (0.108 R)
• M25: 5,864,087 km (0.084 R)
• M26: 5,911,659 km (0.051 R)
• M27: 6,199,037 km (0.113 R)
• M28: 6,393,215 km (0.092 R)
• M29: 6,491,052 km (0.114 R)
• M30: 6,688,222 km (0.094 R)
• M31: 6,837,520 km (0.103 R)
• M32: 7,342,712 km (0.102 R)
• M33: 9,369,913 km (0.104 R)
• M34: 9,425,563 km (0.098 R)
• M35: 11,378,863 km (0.063 R)
• M36: 11,796,241 km (0.091 R)
• M37: 12,097,232 km (0.068 R)
• M38: 12,157,819 km (0.107 R)
• M39: 12,218,406 km (0.114 R)
• M40: 14,919,096 km (0.097 R)
• M41: 15,114,172 km (0.079 R)
• M42: 15,244,771 km (0.098 R)
• M43: 16,302,428 km (0.054 R)
• M44: 17,111,004 km (0.113 R)
• M45: 18,209,502 km (0.093 R)
• M46: 19,048,297 km (0.084 R)
• M47: 19,971,017 km (0.056 R)
• M48: 20,329,752 km (0.118 R)
• M49: 20,546,071 km (0.116 R)
• M50: 22,081,394 km (0.098 R)
• M51: 23,653,368 km (0.057 R)
• M52: 25,493,572 km (0.062 R)
• M53: 25,649,004 km (0.108 R)
• M54: 26,666,868 km (0.059 R)
• M55: 28,258,439 km (0.115 R)
• M56: 30,538,012 km (0.115 R)
• M57: 32,875,927 km (0.116 R)
• M58: 34,066,278 km (0.114 R)
• M59: 34,838,951 km (0.097 R)
• M60: 35,704,225 km (0.06 R)
• M61: 36,052,339 km (0.068 R)
• M62: 38,431,244 km (0.113 R)
• M63: 38,520,255 km (0.078 R)
• M64: 38,788,035 km (0.104 R)
• M65: 38,877,345 km (0.104 R)
• M66: 39,684,575 km (0.063 R)
• M67: 39,774,633 km (0.101 R)
• M68: 41,042,325 km (0.089 R)
• M69: 41,133,431 km (0.085 R)
• M70: 41,315,790 km (0.032 R)
• M71: 45,865,510 km (0.079 R)
• M72: 46,338,688 km (0.118 R)
• M73: 46,433,533 km (0.102 R)
• M74: 48,343,450 km (0.045 R)
• M75: 49,114,627 km (0.06 R)
• M76: 51,943,971 km (0.062 R)
• M77: 56,235,336 km (0.068 R)
• M78: 58,269,717 km (0.061 R)
• M79: 59,090,261 km (0.119 R)
• M80: 59,708,101 km (0.059 R)
• M81: 61,470,363 km (0.118 R)
• M82: 61,678,753 km (0.077 R)
• M83: 61,992,011 km (0.026 R)
• M84: 65,258,331 km (0.059 R)
• M85: 66,537,543 km (0.119 R)
• M86: 67,932,842 km (0.098 R)
• M87: 68,364,133 km (0.086 R)
• M88: 69,989,364 km (0.044 R)
• M89: 70,098,271 km (0.081 R)
• M90: 72,066,381 km (0.065 R)
• M91: 73,057,167 km (0.106 R)
• M92: 73,941,740 km (0.12 R)

Planet 9 - Ice Giant

Semi-Major Axis: 14.44 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 340.9

Radius: 3.7

Gravity: 24.9 G

Time & Orbit

Eccentricity (e): 0.2

Orbit Range: 11.55 AU - 17.33 AU

Year: 20563 Days

Day: 17.4 Hours

Environment

Temp: -199 °C

Axial Tilt: 41.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 24,219,854 km

• M1: 170,242 km (0.104 R)
• M2: 333,603 km (0.092 R)
• M3: 574,306 km (0.106 R)
• M4: 752,926 km (0.091 R)
• M5: 948,002 km (0.059 R)
• M6: 1,357,451 km (0.084 R)
• M7: 1,786,797 km (0.077 R)
• M8: 1,900,192 km (0.072 R)
• M9: 2,533,889 km (0.091 R)
• M10: 2,597,468 km (0.061 R)
• M11: 3,090,393 km (0.094 R)
• M12: 4,011,018 km (0.066 R)
• M13: 4,348,062 km (0.118 R)
• M14: 4,850,861 km (0.106 R)
• M15: 5,169,354 km (0.104 R)
• M16: 5,826,538 km (0.086 R)
• M17: 7,127,591 km (0.119 R)
• M18: 7,764,279 km (0.115 R)
• M19: 8,609,208 km (0.1 R)
• M20: 9,730,593 km (0.109 R)
• M21: 10,486,362 km (0.117 R)
• M22: 11,208,620 km (0.112 R)
• M23: 12,321,629 km (0.093 R)
• M24: 13,358,791 km (0.09 R)
• M25: 13,971,843 km (0.099 R)
• M26: 14,423,479 km (0.078 R)
• M27: 14,594,020 km (0.079 R)
• M28: 15,283,068 km (0.107 R)
• M29: 15,923,945 km (0.058 R)
• M30: 16,871,797 km (0.061 R)
• M31: 17,111,603 km (0.107 R)
• M32: 19,570,693 km (0.082 R)
• M33: 20,329,752 km (0.051 R)
• M34: 20,905,255 km (0.062 R)
• M35: 21,098,386 km (0.118 R)
• M36: 21,291,966 km (0.07 R)
• M37: 21,615,995 km (0.027 R)
• M38: 21,681,070 km (0.116 R)
• M39: 22,466,159 km (0.119 R)
• M40: 22,663,778 km (0.112 R)
• M41: 22,928,417 km (0.068 R)
• M42: 25,698,221 km (0.077 R)
• M43: 26,250,836 km (0.045 R)
• M44: 26,389,513 km (0.093 R)
• M45: 26,598,202 km (0.1 R)
• M46: 27,649,426 km (0.035 R)
• M47: 29,287,673 km (0.086 R)
• M48: 29,359,480 km (0.092 R)
• M49: 29,575,649 km (0.111 R)
• M50: 30,591,418 km (0.082 R)
• M51: 30,664,422 km (0.069 R)
• M52: 30,737,426 km (0.113 R)
• M53: 31,030,189 km (0.119 R)
• M54: 31,323,849 km (0.049 R)
• M55: 33,030,462 km (0.093 R)
• M56: 33,330,256 km (0.096 R)
• M57: 33,932,687 km (0.06 R)
• M58: 35,224,763 km (0.042 R)
• M59: 36,146,436 km (0.119 R)
• M60: 36,223,628 km (0.112 R)
• M61: 36,842,814 km (0.119 R)
• M62: 36,998,246 km (0.106 R)
• M63: 37,778,399 km (0.117 R)
• M64: 38,013,417 km (0.093 R)
• M65: 38,170,495 km (0.064 R)
• M66: 38,563,938 km (0.095 R)
• M67: 39,991,400 km (0.07 R)
• M68: 40,071,136 km (0.054 R)
• M69: 40,151,021 km (0.09 R)
• M70: 40,711,565 km (0.108 R)
• M71: 44,458,842 km (0.099 R)
• M72: 45,371,239 km (0.104 R)
• M73: 45,704,393 km (0.053 R)
• M74: 48,740,183 km (0.117 R)
• M75: 48,825,454 km (0.045 R)
• M76: 49,252,556 km (0.081 R)
• M77: 49,766,574 km (0.117 R)
• M78: 50,110,200 km (0.043 R)
• M79: 50,368,556 km (0.12 R)
• M80: 50,541,042 km (0.074 R)
• M81: 51,146,016 km (0.098 R)
• M82: 52,276,078 km (0.088 R)
• M83: 52,363,443 km (0.067 R)
• M84: 52,975,598 km (0.081 R)
• M85: 53,150,927 km (0.056 R)
• M86: 56,519,272 km (0.096 R)
• M87: 57,057,376 km (0.096 R)
• M88: 57,597,275 km (0.112 R)
• M89: 58,138,819 km (0.087 R)
• M90: 58,319,683 km (0.109 R)
• M91: 60,413,155 km (0.085 R)

Planet 10 - Ice Giant

Semi-Major Axis: 14.44 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 20.9

Radius: 3.9

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.042

Orbit Range: 13.83 AU - 15.05 AU

Year: 20563 Days

Day: 15.8 Hours

Environment

Temp: -195 °C

Axial Tilt: 2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (36)

Outer Limit: 24,219,854 km

• M1: 69,114 km (0.109 R)
• M2: 167,849 km (0.072 R)
• M3: 335,099 km (0.095 R)
• M4: 449,093 km (0.075 R)
• M5: 812,915 km (0.074 R)
• M6: 1,683,275 km (0.097 R)
• M7: 1,987,408 km (0.062 R)
• M8: 2,161,988 km (0.082 R)
• M9: 2,424,682 km (0.107 R)
• M10: 2,784,615 km (0.066 R)
• M11: 3,960,903 km (0.06 R)
• M12: 4,444,553 km (0.114 R)
• M13: 4,568,270 km (0.11 R)
• M14: 6,026,401 km (0.108 R)
• M15: 6,417,449 km (0.119 R)
• M16: 6,887,935 km (0.079 R)
• M17: 7,272,252 km (0.089 R)
• M18: 7,638,916 km (0.08 R)
• M19: 9,059,946 km (0.082 R)
• M20: 9,666,715 km (0.112 R)
• M21: 10,259,422 km (0.084 R)
• M22: 10,341,102 km (0.107 R)
• M23: 11,366,745 km (0.112 R)
• M24: 11,621,062 km (0.101 R)
• M25: 11,991,765 km (0.069 R)
• M26: 12,482,297 km (0.075 R)
• M27: 12,598,684 km (0.059 R)
• M28: 13,512,876 km (0.096 R)
• M29: 13,902,429 km (0.053 R)
• M30: 16,827,816 km (0.109 R)
• M31: 17,182,213 km (0.097 R)
• M32: 18,757,179 km (0.117 R)
• M33: 19,900,257 km (0.053 R)
• M34: 22,077,355 km (0.058 R)
• M35: 22,359,197 km (0.06 R)
• M36: 22,926,472 km (0.119 R)

Kuiper Belt

Range: 30 - 45 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 379 - 18,314 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit