🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.56 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.5

Radius: 1.18

Gravity: 1.08 G

Time & Orbit

Eccentricity (e): 0.138

Orbit Range: 0.48 AU - 0.64 AU

Year: 149 Days

Day: 40.1 Hours

Environment

Temp: 258 °C

Axial Tilt: 0.2 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.68 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.22

Radius: 1.6

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.094

Orbit Range: 0.62 AU - 0.74 AU

Year: 200 Days

Day: 20.1 Hours

Environment

Temp: 195 °C

Axial Tilt: 5.7 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 95,390,410 km

• M1: 299,944 km (0.099 R)

Planet 3 - Terrestrial

Semi-Major Axis: 4.64 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.05

Radius: 1.56

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.235

Orbit Range: 3.55 AU - 5.73 AU

Year: 3563 Days

Day: 20.9 Hours

Environment

Temp: -122 °C

Axial Tilt: 97.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 95,390,410 km

• M1: 2,746,467 km (0.119 R)

Planet 4 - Terrestrial

Semi-Major Axis: 5 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.42

Radius: 1.64

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 4.81 AU - 5.19 AU

Year: 3985 Days

Day: 21.5 Hours

Environment

Temp: -131 °C

Axial Tilt: 47.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 6.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 88.1

Radius: 12.7

Gravity: 0.55 G

Time & Orbit

Eccentricity (e): 0.234

Orbit Range: 5.08 AU - 8.18 AU

Year: 6085 Days

Day: 8.2 Hours

Environment

Temp: -159 °C

Axial Tilt: 34.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 95,390,410 km

• M1: 199,564 km (0.114 R)
• M2: 338,989 km (0.028 R)
• M3: 430,243 km (0.047 R)
• M4: 662,120 km (0.109 R)
• M5: 855,849 km (0.039 R)
• M6: 1,088,923 km (0.086 R)
• M7: 1,228,947 km (0.08 R)
• M8: 1,407,566 km (0.083 R)
• M9: 1,970,952 km (0.071 R)
• M10: 2,106,787 km (0.086 R)
• M11: 2,322,956 km (0.048 R)
• M12: 2,427,225 km (0.099 R)
• M13: 2,519,827 km (0.099 R)
• M14: 2,600,161 km (0.094 R)
• M15: 2,791,197 km (0.069 R)
• M16: 3,158,310 km (0.09 R)
• M17: 3,496,102 km (0.11 R)
• M18: 3,814,895 km (0.096 R)
• M19: 4,127,256 km (0.113 R)
• M20: 4,238,706 km (0.104 R)
• M21: 5,320,448 km (0.116 R)
• M22: 5,581,796 km (0.106 R)
• M23: 5,990,946 km (0.067 R)
• M24: 6,226,563 km (0.053 R)
• M25: 6,913,965 km (0.083 R)
• M26: 7,411,378 km (0.089 R)
• M27: 7,508,467 km (0.091 R)
• M28: 7,605,855 km (0.084 R)
• M29: 8,400,519 km (0.087 R)
• M30: 8,869,658 km (0.053 R)
• M31: 9,076,252 km (0.085 R)
• M32: 9,918,488 km (0.068 R)
• M33: 10,851,830 km (0.112 R)
• M34: 11,095,076 km (0.111 R)
• M35: 11,250,957 km (0.109 R)
• M36: 11,452,315 km (0.069 R)
• M37: 11,767,817 km (0.1 R)
• M38: 12,615,738 km (0.052 R)
• M39: 12,755,163 km (0.114 R)
• M40: 13,035,360 km (0.043 R)
• M41: 13,129,308 km (0.117 R)
• M42: 13,223,405 km (0.112 R)
• M43: 13,578,251 km (0.069 R)
• M44: 14,032,430 km (0.114 R)
• M45: 14,249,197 km (0.098 R)
• M46: 14,637,553 km (0.093 R)
• M47: 14,808,544 km (0.076 R)
• M48: 15,078,568 km (0.118 R)
• M49: 15,723,185 km (0.069 R)
• M50: 16,758,253 km (0.03 R)
• M51: 16,885,860 km (0.12 R)

Planet 6 - Gas Giant

Semi-Major Axis: 11.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 383

Radius: 14.5

Gravity: 1.82 G

Time & Orbit

Eccentricity (e): 0.093

Orbit Range: 10.78 AU - 12.98 AU

Year: 14596 Days

Day: 14.2 Hours

Environment

Temp: -178 °C

Axial Tilt: 14.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 95,390,410 km

• M1: 273,315 km (0.115 R)
• M2: 1,117,945 km (0.109 R)
• M3: 1,479,523 km (0.112 R)
• M4: 1,593,217 km (0.093 R)
• M5: 2,002,367 km (0.082 R)
• M6: 2,154,808 km (0.081 R)
• M7: 2,553,486 km (0.103 R)
• M8: 2,663,889 km (0.11 R)
• M9: 2,860,910 km (0.115 R)
• M10: 5,052,668 km (0.056 R)
• M11: 5,333,613 km (0.057 R)
• M12: 5,583,890 km (0.074 R)
• M13: 6,021,913 km (0.086 R)
• M14: 6,245,113 km (0.057 R)
• M15: 7,924,199 km (0.071 R)
• M16: 8,708,541 km (0.12 R)
• M17: 9,431,398 km (0.074 R)
• M18: 9,909,363 km (0.105 R)
• M19: 10,262,115 km (0.093 R)
• M20: 10,439,987 km (0.063 R)
• M21: 10,574,176 km (0.106 R)
• M22: 12,369,500 km (0.078 R)
• M23: 12,464,046 km (0.075 R)
• M24: 13,912,153 km (0.107 R)
• M25: 15,159,201 km (0.056 R)
• M26: 15,668,133 km (0.111 R)
• M27: 15,770,608 km (0.12 R)
• M28: 16,912,338 km (0.12 R)
• M29: 18,241,964 km (0.116 R)
• M30: 18,457,834 km (0.095 R)
• M31: 20,103,859 km (0.1 R)
• M32: 20,888,051 km (0.096 R)
• M33: 21,911,002 km (0.115 R)
• M34: 22,198,080 km (0.095 R)
• M35: 24,658,367 km (0.064 R)
• M36: 24,837,435 km (0.107 R)
• M37: 25,316,896 km (0.1 R)
• M38: 26,468,202 km (0.102 R)
• M39: 26,896,500 km (0.046 R)
• M40: 27,884,445 km (0.031 R)
• M41: 28,133,376 km (0.11 R)
• M42: 30,405,917 km (0.104 R)
• M43: 32,083,657 km (0.106 R)
• M44: 32,606,053 km (0.069 R)
• M45: 33,262,787 km (0.102 R)
• M46: 33,659,072 km (0.04 R)
• M47: 35,798,322 km (0.058 R)
• M48: 37,706,293 km (0.109 R)
• M49: 38,672,546 km (0.12 R)
• M50: 38,950,199 km (0.087 R)
• M51: 39,577,164 km (0.064 R)
• M52: 41,691,131 km (0.111 R)
• M53: 41,975,816 km (0.101 R)
• M54: 42,332,607 km (0.086 R)
• M55: 42,475,473 km (0.069 R)
• M56: 46,396,134 km (0.036 R)
• M57: 47,877,303 km (0.034 R)
• M58: 48,324,750 km (0.084 R)

Planet 7 - Ice Giant

Semi-Major Axis: 12.89 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 511.2

Radius: 4.7

Gravity: 23.14 G

Time & Orbit

Eccentricity (e): 0.052

Orbit Range: 12.22 AU - 13.56 AU

Year: 16496 Days

Day: 21.4 Hours

Environment

Temp: -173 °C

Axial Tilt: 81 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 95,390,410 km

• M1: 63,878 km (0.092 R)
• M2: 204,949 km (0.097 R)
• M3: 389,403 km (0.12 R)
• M4: 455,526 km (0.088 R)
• M5: 507,586 km (0.093 R)
• M6: 756,816 km (0.083 R)
• M7: 1,430,604 km (0.057 R)
• M8: 1,561,203 km (0.081 R)
• M9: 2,270,746 km (0.113 R)
• M10: 2,579,217 km (0.107 R)
• M11: 3,099,817 km (0.105 R)
• M12: 3,476,206 km (0.094 R)
• M13: 3,511,212 km (0.104 R)
• M14: 3,794,849 km (0.085 R)
• M15: 3,903,158 km (0.102 R)
• M16: 4,159,868 km (0.097 R)
• M17: 5,040,999 km (0.107 R)
• M18: 5,240,114 km (0.084 R)
• M19: 6,315,873 km (0.051 R)
• M20: 7,593,139 km (0.102 R)
• M21: 7,729,722 km (0.072 R)
• M22: 7,821,276 km (0.115 R)
• M23: 8,190,783 km (0.091 R)
• M24: 8,566,124 km (0.05 R)
• M25: 9,577,704 km (0.098 R)
• M26: 10,222,770 km (0.12 R)
• M27: 10,323,151 km (0.101 R)
• M28: 11,035,685 km (0.114 R)
• M29: 12,507,429 km (0.115 R)
• M30: 12,668,696 km (0.044 R)
• M31: 12,776,705 km (0.118 R)
• M32: 12,993,473 km (0.041 R)
• M33: 15,284,564 km (0.086 R)
• M34: 15,745,924 km (0.093 R)
• M35: 16,211,921 km (0.093 R)
• M36: 16,387,848 km (0.111 R)
• M37: 16,623,315 km (0.03 R)
• M38: 16,859,979 km (0.098 R)
• M39: 16,978,760 km (0.103 R)
• M40: 17,636,691 km (0.101 R)
• M41: 18,977,537 km (0.039 R)
• M42: 19,163,038 km (0.086 R)
• M43: 19,473,304 km (0.106 R)
• M44: 20,350,995 km (0.084 R)
• M45: 20,667,544 km (0.058 R)
• M46: 23,126,185 km (0.09 R)
• M47: 23,258,131 km (0.09 R)
• M48: 23,988,168 km (0.112 R)
• M49: 24,591,197 km (0.112 R)
• M50: 25,199,163 km (0.039 R)
• M51: 25,266,931 km (0.106 R)
• M52: 25,539,049 km (0.088 R)
• M53: 26,292,125 km (0.113 R)
• M54: 27,121,944 km (0.032 R)
• M55: 27,330,783 km (0.103 R)
• M56: 28,665,495 km (0.075 R)
• M57: 28,807,314 km (0.04 R)
• M58: 29,091,400 km (0.107 R)
• M59: 29,806,029 km (0.092 R)
• M60: 30,309,576 km (0.099 R)
• M61: 30,743,410 km (0.1 R)
• M62: 31,617,360 km (0.11 R)
• M63: 32,130,930 km (0.061 R)
• M64: 32,499,389 km (0.089 R)
• M65: 33,240,647 km (0.073 R)
• M66: 33,314,997 km (0.06 R)
• M67: 35,042,104 km (0.087 R)
• M68: 35,802,062 km (0.115 R)
• M69: 36,260,579 km (0.058 R)
• M70: 37,880,874 km (0.094 R)
• M71: 38,660,727 km (0.114 R)
• M72: 39,367,128 km (0.117 R)
• M73: 39,445,817 km (0.118 R)
• M74: 39,761,319 km (0.119 R)
• M75: 41,111,589 km (0.086 R)
• M76: 41,191,475 km (0.06 R)
• M77: 44,265,561 km (0.098 R)
• M78: 45,912,933 km (0.059 R)
• M79: 46,244,891 km (0.037 R)
• M80: 46,494,270 km (0.102 R)
• M81: 46,911,050 km (0.118 R)
• M82: 47,329,026 km (0.105 R)
• M83: 49,013,050 km (0.109 R)
• M84: 49,097,872 km (0.098 R)
• M85: 49,182,544 km (0.07 R)
• M86: 49,862,466 km (0.11 R)
• M87: 51,317,605 km (0.082 R)
• M88: 52,007,251 km (0.109 R)
• M89: 52,353,121 km (0.099 R)
• M90: 53,657,166 km (0.055 R)
• M91: 54,006,776 km (0.119 R)
• M92: 54,094,291 km (0.059 R)
• M93: 56,208,558 km (0.064 R)
• M94: 57,186,628 km (0.116 R)
• M95: 58,349,752 km (0.118 R)
• M96: 58,889,202 km (0.083 R)
• M97: 59,701,518 km (0.093 R)

Planet 8 - Ice Giant

Semi-Major Axis: 14.19 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 453.1

Radius: 5.4

Gravity: 15.54 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 11.18 AU - 17.2 AU

Year: 19053 Days

Day: 23.1 Hours

Environment

Temp: -182 °C

Axial Tilt: 10.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 95,390,410 km

• M1: 141,071 km (0.1 R)
• M2: 417,079 km (0.079 R)
• M3: 762,650 km (0.116 R)
• M4: 1,154,297 km (0.112 R)
• M5: 1,600,398 km (0.078 R)
• M6: 1,712,596 km (0.113 R)
• M7: 1,798,466 km (0.081 R)
• M8: 2,156,005 km (0.115 R)
• M9: 3,142,154 km (0.037 R)
• M10: 3,283,075 km (0.112 R)
• M11: 3,607,553 km (0.102 R)
• M12: 3,866,955 km (0.117 R)
• M13: 4,482,401 km (0.115 R)
• M14: 4,680,917 km (0.072 R)
• M15: 5,127,916 km (0.098 R)
• M16: 5,335,707 km (0.095 R)
• M17: 7,232,309 km (0.067 R)
• M18: 7,418,409 km (0.119 R)
• M19: 8,666,055 km (0.108 R)
• M20: 9,062,938 km (0.081 R)
• M21: 9,112,904 km (0.097 R)
• M22: 9,618,245 km (0.091 R)
• M23: 9,720,421 km (0.119 R)
• M24: 9,771,583 km (0.096 R)
• M25: 9,925,819 km (0.116 R)
• M26: 10,236,533 km (0.107 R)
• M27: 10,340,803 km (0.077 R)
• M28: 11,728,473 km (0.119 R)
• M29: 12,499,650 km (0.063 R)
• M30: 12,723,000 km (0.115 R)
• M31: 13,686,859 km (0.095 R)
• M32: 16,654,731 km (0.06 R)
• M33: 17,333,307 km (0.115 R)
• M34: 17,395,540 km (0.039 R)
• M35: 17,769,983 km (0.098 R)
• M36: 17,895,346 km (0.059 R)
• M37: 17,958,177 km (0.108 R)
• M38: 18,973,049 km (0.103 R)
• M39: 19,941,396 km (0.095 R)
• M40: 20,333,193 km (0.117 R)
• M41: 20,727,533 km (0.093 R)
• M42: 21,190,838 km (0.088 R)
• M43: 22,533,179 km (0.118 R)
• M44: 23,626,740 km (0.114 R)
• M45: 23,833,783 km (0.115 R)
• M46: 24,807,516 km (0.117 R)
• M47: 26,007,440 km (0.082 R)
• M48: 27,587,942 km (0.041 R)
• M49: 27,878,610 km (0.069 R)
• M50: 27,951,465 km (0.104 R)
• M51: 28,904,104 km (0.082 R)
• M52: 28,977,856 km (0.098 R)
• M53: 29,421,563 km (0.109 R)
• M54: 29,941,864 km (0.07 R)
• M55: 30,390,359 km (0.103 R)
• M56: 31,977,592 km (0.082 R)
• M57: 32,206,477 km (0.109 R)
• M58: 32,819,678 km (0.12 R)
• M59: 33,282,085 km (0.096 R)
• M60: 34,213,183 km (0.049 R)
• M61: 35,310,483 km (0.033 R)
• M62: 35,389,321 km (0.113 R)
• M63: 35,784,259 km (0.063 R)
• M64: 37,218,155 km (0.062 R)
• M65: 37,458,858 km (0.112 R)
• M66: 37,619,676 km (0.108 R)
• M67: 37,942,059 km (0.117 R)
• M68: 40,306,304 km (0.114 R)
• M69: 41,132,533 km (0.096 R)
• M70: 41,215,410 km (0.11 R)
• M71: 41,464,640 km (0.12 R)
• M72: 41,547,817 km (0.077 R)
• M73: 41,880,971 km (0.095 R)
• M74: 42,717,822 km (0.11 R)
• M75: 44,068,092 km (0.059 R)
• M76: 45,432,425 km (0.066 R)
• M77: 48,115,014 km (0.107 R)
• M78: 50,049,613 km (0.075 R)
• M79: 50,937,477 km (0.117 R)
• M80: 51,115,648 km (0.088 R)
• M81: 52,368,679 km (0.061 R)
• M82: 52,548,496 km (0.03 R)
• M83: 54,176,270 km (0.111 R)
• M84: 55,087,621 km (0.115 R)
• M85: 55,453,687 km (0.086 R)
• M86: 55,545,241 km (0.114 R)
• M87: 55,728,648 km (0.118 R)
• M88: 57,295,685 km (0.079 R)
• M89: 58,038,140 km (0.115 R)
• M90: 59,345,027 km (0.102 R)
• M91: 60,472,845 km (0.103 R)
• M92: 60,850,430 km (0.097 R)
• M93: 61,228,763 km (0.109 R)
• M94: 61,323,458 km (0.119 R)
• M95: 61,607,844 km (0.1 R)
• M96: 61,702,689 km (0.095 R)
• M97: 62,463,693 km (0.059 R)

Planet 9 - Ice Giant

Semi-Major Axis: 17.67 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 770.2

Radius: 4.5

Gravity: 38.03 G

Time & Orbit

Eccentricity (e): 0.016

Orbit Range: 17.39 AU - 17.95 AU

Year: 26476 Days

Day: 22.8 Hours

Environment

Temp: -201 °C

Axial Tilt: 31.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 95,390,410 km

• M1: 124,166 km (0.092 R)
• M2: 165,904 km (0.1 R)
• M3: 267,331 km (0.092 R)
• M4: 305,628 km (0.103 R)
• M5: 367,113 km (0.035 R)
• M6: 432,787 km (0.1 R)
• M7: 1,186,461 km (0.115 R)
• M8: 1,353,262 km (0.113 R)
• M9: 1,527,693 km (0.116 R)
• M10: 2,092,874 km (0.07 R)
• M11: 2,847,446 km (0.052 R)
• M12: 4,472,976 km (0.088 R)
• M13: 4,524,438 km (0.071 R)
• M14: 4,890,205 km (0.065 R)
• M15: 5,157,237 km (0.059 R)
• M16: 5,594,362 km (0.117 R)
• M17: 6,100,302 km (0.101 R)
• M18: 6,272,190 km (0.081 R)
• M19: 6,915,910 km (0.08 R)
• M20: 7,155,117 km (0.119 R)
• M21: 7,336,429 km (0.119 R)
• M22: 8,840,037 km (0.028 R)
• M23: 9,759,615 km (0.072 R)
• M24: 10,095,313 km (0.079 R)
• M25: 10,503,267 km (0.088 R)
• M26: 11,901,408 km (0.085 R)
• M27: 13,282,645 km (0.075 R)
• M28: 14,637,404 km (0.05 R)
• M29: 15,408,730 km (0.112 R)
• M30: 15,877,869 km (0.059 R)
• M31: 16,990,728 km (0.064 R)
• M32: 17,071,211 km (0.063 R)
• M33: 17,475,425 km (0.099 R)
• M34: 19,796,137 km (0.066 R)
• M35: 20,391,387 km (0.078 R)
• M36: 21,773,671 km (0.096 R)
• M37: 21,861,036 km (0.11 R)
• M38: 22,123,879 km (0.117 R)
• M39: 22,564,445 km (0.073 R)
• M40: 23,007,704 km (0.117 R)
• M41: 24,627,549 km (0.102 R)
• M42: 25,543,088 km (0.104 R)
• M43: 26,563,196 km (0.088 R)
• M44: 27,031,288 km (0.098 R)
• M45: 27,407,676 km (0.105 R)
• M46: 27,975,400 km (0.103 R)
• M47: 28,547,163 km (0.08 R)
• M48: 29,411,989 km (0.045 R)
• M49: 29,702,208 km (0.105 R)
• M50: 30,774,227 km (0.107 R)
• M51: 31,167,220 km (0.091 R)
• M52: 31,265,656 km (0.106 R)
• M53: 33,964,252 km (0.103 R)
• M54: 34,370,260 km (0.106 R)
• M55: 34,778,064 km (0.051 R)
• M56: 34,880,240 km (0.043 R)
• M57: 36,321,017 km (0.098 R)
• M58: 37,571,505 km (0.08 R)
• M59: 38,096,743 km (0.109 R)
• M60: 40,221,632 km (0.067 R)
• M61: 41,949,038 km (0.096 R)
• M62: 45,811,206 km (0.065 R)
• M63: 46,484,546 km (0.084 R)
• M64: 46,597,194 km (0.053 R)
• M65: 47,048,231 km (0.073 R)
• M66: 47,727,705 km (0.093 R)
• M67: 49,670,233 km (0.094 R)
• M68: 49,900,464 km (0.099 R)
• M69: 51,405,568 km (0.091 R)
• M70: 53,043,067 km (0.097 R)
• M71: 58,299,637 km (0.065 R)
• M72: 60,374,559 km (0.054 R)
• M73: 61,729,916 km (0.101 R)
• M74: 62,846,365 km (0.103 R)
• M75: 63,844,332 km (0.052 R)
• M76: 67,888,411 km (0.107 R)
• M77: 69,812,390 km (0.107 R)
• M78: 70,199,250 km (0.102 R)
• M79: 71,624,169 km (0.099 R)
• M80: 73,320,310 km (0.11 R)
• M81: 74,370,637 km (0.055 R)
• M82: 74,765,874 km (0.074 R)
• M83: 75,690,688 km (0.058 R)
• M84: 78,086,049 km (0.085 R)
• M85: 78,889,988 km (0.114 R)
• M86: 81,047,339 km (0.084 R)
• M87: 81,861,301 km (0.063 R)
• M88: 84,045,131 km (0.101 R)
• M89: 87,356,629 km (0.108 R)
• M90: 87,912,685 km (0.08 R)
• M91: 88,051,811 km (0.088 R)
• M92: 90,991,858 km (0.059 R)
• M93: 92,261,794 km (0.076 R)
• M94: 92,403,164 km (0.089 R)
• M95: 94,391,170 km (0.101 R)

Kuiper Belt

Range: 30.8 - 52.8 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 545 - 17,249 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit