🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.51 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.38

Radius: 1.63

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.202

Orbit Range: 0.41 AU - 0.61 AU

Year: 239 Days

Day: 23.1 Hours

Environment

Temp: -107 °C

Axial Tilt: 14.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 54,324,816 km

• M1: 203,304 km (0.115 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.58 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.97

Radius: 0.99

Gravity: 0.99 G

Time & Orbit

Eccentricity (e): 0.086

Orbit Range: 0.53 AU - 0.63 AU

Year: 290 Days

Day: 42.4 Hours

Environment

Temp: -120 °C

Axial Tilt: 16.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 0.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 456.6

Radius: 14.8

Gravity: 2.08 G

Time & Orbit

Eccentricity (e): 0.176

Orbit Range: 0.67 AU - 0.95 AU

Year: 478 Days

Day: 7.3 Hours

Environment

Temp: -155 °C

Axial Tilt: 5.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (35)

Outer Limit: 54,324,816 km

• M1: 185,950 km (0.026 R)
• M2: 293,511 km (0.099 R)
• M3: 394,789 km (0.067 R)
• M4: 506,389 km (0.065 R)
• M5: 601,533 km (0.087 R)
• M6: 799,301 km (0.054 R)
• M7: 903,272 km (0.093 R)
• M8: 1,021,155 km (0.113 R)
• M9: 1,117,795 km (0.115 R)
• M10: 1,355,207 km (0.065 R)
• M11: 1,457,981 km (0.114 R)
• M12: 1,583,942 km (0.057 R)
• M13: 1,724,564 km (0.117 R)
• M14: 1,869,525 km (0.116 R)
• M15: 2,086,442 km (0.055 R)
• M16: 2,218,387 km (0.102 R)
• M17: 2,323,704 km (0.069 R)
• M18: 2,545,557 km (0.109 R)
• M19: 2,946,330 km (0.079 R)
• M20: 3,174,317 km (0.092 R)
• M21: 3,307,160 km (0.117 R)
• M22: 3,482,788 km (0.11 R)
• M23: 3,578,680 km (0.071 R)
• M24: 3,759,095 km (0.044 R)
• M25: 3,885,805 km (0.092 R)
• M26: 4,006,829 km (0.113 R)
• M27: 4,143,711 km (0.103 R)
• M28: 4,282,089 km (0.097 R)
• M29: 4,407,303 km (0.052 R)
• M30: 4,541,193 km (0.115 R)
• M31: 4,684,059 km (0.096 R)
• M32: 4,874,347 km (0.034 R)
• M33: 5,090,516 km (0.087 R)
• M34: 5,184,165 km (0.03 R)
• M35: 5,444,764 km (0.099 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 73.1

Radius: 9.1

Gravity: 0.88 G

Time & Orbit

Eccentricity (e): 0.113

Orbit Range: 0.78 AU - 0.98 AU

Year: 542 Days

Day: 10.7 Hours

Environment

Temp: -152 °C

Axial Tilt: 77.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (27)

Outer Limit: 54,324,816 km

• M1: 113,994 km (0.073 R)
• M2: 172,636 km (0.118 R)
• M3: 257,009 km (0.091 R)
• M4: 345,122 km (0.075 R)
• M5: 482,453 km (0.035 R)
• M6: 665,860 km (0.087 R)
• M7: 741,407 km (0.112 R)
• M8: 811,568 km (0.084 R)
• M9: 946,955 km (0.116 R)
• M10: 1,131,708 km (0.06 R)
• M11: 1,233,734 km (0.101 R)
• M12: 1,335,460 km (0.09 R)
• M13: 1,482,814 km (0.088 R)
• M14: 1,602,343 km (0.111 R)
• M15: 1,665,174 km (0.083 R)
• M16: 1,839,755 km (0.105 R)
• M17: 1,921,435 km (0.055 R)
• M18: 2,060,262 km (0.101 R)
• M19: 2,194,302 km (0.096 R)
• M20: 2,373,520 km (0.117 R)
• M21: 2,441,437 km (0.11 R)
• M22: 2,514,291 km (0.087 R)
• M23: 2,701,887 km (0.06 R)
• M24: 2,786,260 km (0.106 R)
• M25: 2,844,454 km (0.099 R)
• M26: 3,003,327 km (0.107 R)
• M27: 3,114,029 km (0.091 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.38 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 946.1

Radius: 8.6

Gravity: 12.79 G

Time & Orbit

Eccentricity (e): 0.005

Orbit Range: 1.37 AU - 1.39 AU

Year: 1063 Days

Day: 9.7 Hours

Environment

Temp: -179 °C

Axial Tilt: 33.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (65)

Outer Limit: 54,324,816 km

• M1: 162,613 km (0.113 R)
• M2: 227,987 km (0.085 R)
• M3: 308,321 km (0.036 R)
• M4: 619,186 km (0.088 R)
• M5: 682,914 km (0.079 R)
• M6: 742,454 km (0.084 R)
• M7: 824,583 km (0.119 R)
• M8: 931,995 km (0.099 R)
• M9: 1,051,823 km (0.089 R)
• M10: 1,357,451 km (0.106 R)
• M11: 1,485,806 km (0.096 R)
• M12: 1,582,446 km (0.069 R)
• M13: 1,663,229 km (0.032 R)
• M14: 1,942,379 km (0.099 R)
• M15: 2,009,698 km (0.063 R)
• M16: 2,077,765 km (0.09 R)
• M17: 2,388,928 km (0.119 R)
• M18: 2,513,394 km (0.099 R)
• M19: 2,608,089 km (0.044 R)
• M20: 2,714,902 km (0.084 R)
• M21: 2,866,744 km (0.086 R)
• M22: 2,921,646 km (0.066 R)
• M23: 2,988,068 km (0.069 R)
• M24: 3,316,286 km (0.12 R)
• M25: 3,490,567 km (0.117 R)
• M26: 3,655,873 km (0.083 R)
• M27: 3,763,583 km (0.117 R)
• M28: 3,835,989 km (0.116 R)
• M29: 4,242,596 km (0.117 R)
• M30: 4,343,275 km (0.112 R)
• M31: 4,508,581 km (0.068 R)
• M32: 4,585,624 km (0.091 R)
• M33: 4,688,996 km (0.099 R)
• M34: 5,110,114 km (0.092 R)
• M35: 5,230,839 km (0.054 R)
• M36: 5,298,158 km (0.074 R)
• M37: 5,667,515 km (0.106 R)
• M38: 5,820,404 km (0.036 R)
• M39: 5,988,702 km (0.05 R)
• M40: 6,187,069 km (0.076 R)
• M41: 6,301,362 km (0.116 R)
• M42: 6,402,041 km (0.058 R)
• M43: 6,488,808 km (0.095 R)
• M44: 6,546,702 km (0.029 R)
• M45: 6,707,221 km (0.094 R)
• M46: 6,795,334 km (0.104 R)
• M47: 7,651,033 km (0.118 R)
• M48: 7,712,369 km (0.091 R)
• M49: 8,429,541 km (0.095 R)
• M50: 8,763,892 km (0.061 R)
• M51: 8,908,703 km (0.09 R)
• M52: 9,298,405 km (0.101 R)
• M53: 9,363,780 km (0.032 R)
• M54: 9,429,453 km (0.086 R)
• M55: 9,643,976 km (0.098 R)
• M56: 10,144,980 km (0.111 R)
• M57: 10,330,780 km (0.068 R)
• M58: 10,398,698 km (0.104 R)
• M59: 10,603,048 km (0.047 R)
• M60: 10,723,026 km (0.085 R)
• M61: 10,860,506 km (0.051 R)
• M62: 11,120,059 km (0.118 R)
• M63: 11,574,836 km (0.056 R)
• M64: 11,680,602 km (0.043 R)
• M65: 11,893,180 km (0.101 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.44 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 726.5

Radius: 11.8

Gravity: 5.22 G

Time & Orbit

Eccentricity (e): 0.203

Orbit Range: 1.15 AU - 1.73 AU

Year: 1134 Days

Day: 13.7 Hours

Environment

Temp: -174 °C

Axial Tilt: 37.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (52)

Outer Limit: 54,324,816 km

• M1: 148,551 km (0.067 R)
• M2: 243,994 km (0.098 R)
• M3: 426,803 km (0.079 R)
• M4: 520,301 km (0.054 R)
• M5: 652,247 km (0.068 R)
• M6: 726,148 km (0.073 R)
• M7: 863,329 km (0.11 R)
• M8: 1,038,808 km (0.085 R)
• M9: 1,320,949 km (0.092 R)
• M10: 1,459,028 km (0.105 R)
• M11: 1,602,193 km (0.107 R)
• M12: 2,097,661 km (0.076 R)
• M13: 2,221,528 km (0.064 R)
• M14: 2,308,894 km (0.12 R)
• M15: 2,794,339 km (0.071 R)
• M16: 2,910,127 km (0.048 R)
• M17: 2,984,777 km (0.115 R)
• M18: 3,059,875 km (0.099 R)
• M19: 3,344,859 km (0.106 R)
• M20: 3,501,937 km (0.095 R)
• M21: 3,870,247 km (0.081 R)
• M22: 3,987,980 km (0.078 R)
• M23: 4,083,124 km (0.08 R)
• M24: 4,202,952 km (0.065 R)
• M25: 4,446,198 km (0.096 R)
• M26: 4,644,266 km (0.108 R)
• M27: 5,399,735 km (0.079 R)
• M28: 5,771,785 km (0.096 R)
• M29: 5,893,109 km (0.042 R)
• M30: 6,248,404 km (0.08 R)
• M31: 6,414,906 km (0.118 R)
• M32: 6,540,718 km (0.072 R)
• M33: 7,008,959 km (0.077 R)
• M34: 7,400,158 km (0.029 R)
• M35: 7,768,767 km (0.078 R)
• M36: 8,219,057 km (0.07 R)
• M37: 8,310,162 km (0.104 R)
• M38: 8,524,087 km (0.086 R)
• M39: 8,678,023 km (0.118 R)
• M40: 8,770,774 km (0.075 R)
• M41: 9,082,536 km (0.057 R)
• M42: 9,271,328 km (0.106 R)
• M43: 9,366,173 km (0.108 R)
• M44: 9,652,803 km (0.099 R)
• M45: 9,813,172 km (0.097 R)
• M46: 10,039,364 km (0.117 R)
• M47: 10,153,207 km (0.098 R)
• M48: 10,251,044 km (0.049 R)
• M49: 10,349,181 km (0.113 R)
• M50: 10,447,616 km (0.086 R)
• M51: 11,095,225 km (0.096 R)
• M52: 11,314,087 km (0.059 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 241.5

Radius: 9.5

Gravity: 2.68 G

Time & Orbit

Eccentricity (e): 0.102

Orbit Range: 2.18 AU - 2.68 AU

Year: 2485 Days

Day: 9.8 Hours

Environment

Temp: -189 °C

Axial Tilt: 32.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 54,324,816 km

• M1: 122,820 km (0.12 R)
• M2: 187,147 km (0.11 R)
• M3: 390,600 km (0.102 R)
• M4: 470,336 km (0.07 R)
• M5: 569,519 km (0.069 R)
• M6: 662,719 km (0.025 R)
• M7: 790,774 km (0.098 R)
• M8: 919,877 km (0.055 R)
• M9: 983,157 km (0.073 R)
• M10: 1,089,372 km (0.103 R)
• M11: 1,322,595 km (0.114 R)
• M12: 1,394,851 km (0.108 R)
• M13: 1,468,453 km (0.075 R)
• M14: 1,897,200 km (0.081 R)
• M15: 2,179,192 km (0.082 R)
• M16: 2,396,707 km (0.095 R)
• M17: 2,474,648 km (0.036 R)
• M18: 2,553,336 km (0.081 R)
• M19: 2,724,925 km (0.037 R)
• M20: 3,103,857 km (0.112 R)
• M21: 3,201,095 km (0.108 R)
• M22: 3,324,364 km (0.11 R)
• M23: 3,474,261 km (0.03 R)
• M24: 3,626,402 km (0.105 R)
• M25: 3,832,697 km (0.116 R)
• M26: 4,082,675 km (0.119 R)
• M27: 4,162,860 km (0.114 R)
• M28: 4,640,526 km (0.055 R)
• M29: 4,780,250 km (0.107 R)
• M30: 5,063,888 km (0.106 R)
• M31: 5,193,290 km (0.074 R)
• M32: 5,338,550 km (0.1 R)
• M33: 5,470,345 km (0.118 R)
• M34: 5,857,056 km (0.09 R)
• M35: 5,917,344 km (0.106 R)
• M36: 6,376,310 km (0.116 R)
• M37: 6,438,393 km (0.103 R)
• M38: 6,500,626 km (0.068 R)
• M39: 6,704,378 km (0.093 R)
• M40: 6,974,103 km (0.103 R)
• M41: 7,086,152 km (0.12 R)
• M42: 7,150,479 km (0.09 R)
• M43: 7,263,575 km (0.092 R)
• M44: 7,507,719 km (0.058 R)
• M45: 7,606,154 km (0.067 R)
• M46: 7,721,644 km (0.072 R)
• M47: 7,904,153 km (0.101 R)
• M48: 7,970,874 km (0.041 R)
• M49: 8,104,913 km (0.106 R)
• M50: 8,205,892 km (0.058 R)
• M51: 8,717,367 km (0.117 R)
• M52: 8,924,859 km (0.095 R)
• M53: 9,397,738 km (0.081 R)
• M54: 9,486,151 km (0.034 R)
• M55: 9,610,466 km (0.118 R)
• M56: 10,076,913 km (0.104 R)
• M57: 10,276,626 km (0.112 R)
• M58: 10,349,480 km (0.089 R)
• M59: 10,459,135 km (0.077 R)
• M60: 10,550,839 km (0.119 R)
• M61: 10,827,595 km (0.074 R)
• M62: 11,539,381 km (0.065 R)
• M63: 11,634,077 km (0.092 R)
• M64: 11,748,220 km (0.108 R)
• M65: 12,054,148 km (0.058 R)
• M66: 12,285,426 km (0.117 R)
• M67: 12,674,231 km (0.042 R)
• M68: 12,752,470 km (0.099 R)
• M69: 13,244,947 km (0.114 R)

Planet 8 - Gas Giant

Semi-Major Axis: 5.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 600.3

Radius: 10.6

Gravity: 5.34 G

Time & Orbit

Eccentricity (e): 0.073

Orbit Range: 4.77 AU - 5.53 AU

Year: 7667 Days

Day: 8.6 Hours

Environment

Temp: -225 °C

Axial Tilt: 39.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 54,324,816 km

• M1: 145,409 km (0.098 R)
• M2: 361,428 km (0.096 R)
• M3: 473,328 km (0.085 R)
• M4: 559,945 km (0.11 R)
• M5: 723,007 km (0.106 R)
• M6: 949,946 km (0.065 R)
• M7: 1,324,689 km (0.103 R)
• M8: 1,509,891 km (0.099 R)
• M9: 1,783,655 km (0.082 R)
• M10: 1,926,671 km (0.07 R)
• M11: 2,378,756 km (0.057 R)
• M12: 2,605,546 km (0.069 R)
• M13: 2,674,960 km (0.082 R)
• M14: 3,303,121 km (0.119 R)
• M15: 3,480,095 km (0.087 R)
• M16: 3,686,092 km (0.086 R)
• M17: 4,056,346 km (0.043 R)
• M18: 4,245,887 km (0.117 R)
• M19: 4,549,870 km (0.099 R)
• M20: 4,690,492 km (0.081 R)
• M21: 5,533,924 km (0.095 R)
• M22: 5,927,367 km (0.116 R)
• M23: 6,236,137 km (0.04 R)
• M24: 7,325,060 km (0.112 R)
• M25: 8,575,848 km (0.074 R)
• M26: 8,645,411 km (0.039 R)
• M27: 10,517,478 km (0.098 R)
• M28: 10,891,473 km (0.106 R)
• M29: 11,193,810 km (0.117 R)
• M30: 11,923,100 km (0.05 R)
• M31: 12,000,741 km (0.112 R)
• M32: 12,352,296 km (0.112 R)
• M33: 14,325,343 km (0.104 R)
• M34: 14,615,114 km (0.105 R)
• M35: 14,698,290 km (0.089 R)
• M36: 14,823,204 km (0.101 R)
• M37: 15,411,423 km (0.046 R)
• M38: 16,178,860 km (0.05 R)
• M39: 16,567,366 km (0.096 R)
• M40: 16,827,965 km (0.115 R)
• M41: 18,420,285 km (0.089 R)
• M42: 19,097,814 km (0.087 R)
• M43: 19,188,769 km (0.104 R)
• M44: 19,416,756 km (0.074 R)
• M45: 20,245,229 km (0.083 R)
• M46: 20,944,300 km (0.053 R)
• M47: 21,556,754 km (0.078 R)
• M48: 22,079,449 km (0.088 R)
• M49: 23,477,591 km (0.116 R)
• M50: 23,721,435 km (0.078 R)
• M51: 24,904,156 km (0.098 R)
• M52: 25,703,158 km (0.111 R)
• M53: 25,803,688 km (0.112 R)
• M54: 27,223,970 km (0.112 R)
• M55: 28,047,058 km (0.062 R)
• M56: 29,035,002 km (0.095 R)
• M57: 29,559,492 km (0.118 R)
• M58: 30,034,316 km (0.108 R)
• M59: 30,299,254 km (0.043 R)
• M60: 30,405,318 km (0.117 R)
• M61: 30,777,817 km (0.104 R)
• M62: 31,581,307 km (0.097 R)
• M63: 32,717,653 km (0.069 R)
• M64: 32,935,617 km (0.109 R)
• M65: 33,702,306 km (0.08 R)
• M66: 34,087,820 km (0.093 R)
• M67: 34,585,681 km (0.073 R)
• M68: 35,364,937 km (0.113 R)
• M69: 37,680,113 km (0.033 R)
• M70: 37,965,696 km (0.12 R)

Planet 9 - Ice Giant

Semi-Major Axis: 8.85 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 334.3

Radius: 3.4

Gravity: 28.92 G

Time & Orbit

Eccentricity (e): 0.002

Orbit Range: 8.83 AU - 8.87 AU

Year: 17271 Days

Day: 20.3 Hours

Environment

Temp: -236 °C

Axial Tilt: 6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 54,324,816 km

• M1: 67,469 km (0.118 R)
• M2: 104,868 km (0.066 R)
• M3: 219,460 km (0.077 R)
• M4: 310,416 km (0.114 R)
• M5: 397,781 km (0.074 R)
• M6: 1,758,822 km (0.045 R)
• M7: 2,214,647 km (0.08 R)
• M8: 2,916,261 km (0.103 R)
• M9: 3,227,424 km (0.078 R)
• M10: 3,386,896 km (0.097 R)
• M11: 4,256,957 km (0.108 R)
• M12: 4,502,447 km (0.092 R)
• M13: 5,266,144 km (0.086 R)
• M14: 5,605,432 km (0.108 R)
• M15: 5,990,796 km (0.108 R)
• M16: 6,147,425 km (0.086 R)
• M17: 6,625,091 km (0.084 R)
• M18: 6,868,337 km (0.087 R)
• M19: 7,114,576 km (0.025 R)
• M20: 8,432,084 km (0.069 R)
• M21: 8,784,088 km (0.109 R)
• M22: 9,185,758 km (0.073 R)
• M23: 9,914,599 km (0.106 R)
• M24: 10,192,701 km (0.102 R)
• M25: 10,379,399 km (0.091 R)
• M26: 10,426,373 km (0.04 R)
• M27: 10,946,675 km (0.111 R)
• M28: 11,427,033 km (0.069 R)
• M29: 11,621,062 km (0.095 R)
• M30: 11,767,369 km (0.11 R)
• M31: 11,963,342 km (0.115 R)
• M32: 12,358,430 km (0.108 R)
• M33: 13,826,284 km (0.12 R)
• M34: 15,401,699 km (0.102 R)
• M35: 15,723,634 km (0.045 R)
• M36: 16,977,713 km (0.114 R)
• M37: 17,033,064 km (0.084 R)
• M38: 18,094,162 km (0.062 R)
• M39: 18,604,290 km (0.029 R)
• M40: 18,718,284 km (0.066 R)
• M41: 19,004,166 km (0.099 R)
• M42: 19,929,129 km (0.096 R)
• M43: 20,045,666 km (0.072 R)
• M44: 20,573,447 km (0.089 R)
• M45: 21,284,037 km (0.084 R)
• M46: 22,183,569 km (0.117 R)
• M47: 22,365,031 km (0.088 R)
• M48: 22,790,188 km (0.106 R)
• M49: 22,851,224 km (0.101 R)
• M50: 23,648,581 km (0.114 R)
• M51: 24,830,255 km (0.092 R)
• M52: 24,955,767 km (0.087 R)
• M53: 26,350,319 km (0.085 R)
• M54: 26,928,066 km (0.073 R)
• M55: 28,226,725 km (0.091 R)
• M56: 28,488,820 km (0.09 R)
• M57: 28,751,813 km (0.111 R)
• M58: 29,612,151 km (0.083 R)
• M59: 29,945,305 km (0.07 R)
• M60: 30,012,026 km (0.067 R)
• M61: 30,817,161 km (0.089 R)
• M62: 30,884,480 km (0.066 R)
• M63: 32,311,494 km (0.111 R)
• M64: 33,274,755 km (0.041 R)
• M65: 35,936,400 km (0.094 R)
• M66: 36,007,310 km (0.11 R)
• M67: 36,505,321 km (0.047 R)
• M68: 36,790,904 km (0.043 R)
• M69: 37,724,245 km (0.057 R)
• M70: 38,230,035 km (0.113 R)
• M71: 39,467,808 km (0.105 R)
• M72: 40,423,140 km (0.107 R)
• M73: 41,088,850 km (0.101 R)
• M74: 43,788,194 km (0.118 R)
• M75: 46,931,246 km (0.105 R)
• M76: 47,008,887 km (0.107 R)
• M77: 48,569,193 km (0.113 R)
• M78: 50,941,217 km (0.11 R)
• M79: 51,020,952 km (0.076 R)
• M80: 51,579,999 km (0.108 R)
• M81: 51,820,403 km (0.058 R)
• M82: 52,141,291 km (0.098 R)
• M83: 53,188,925 km (0.081 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: 179 - 17,038 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit