🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.64 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.67

Radius: 1.85

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.107

Orbit Range: 0.57 AU - 0.71 AU

Year: 336 Days

Day: 30.6 Hours

Environment

Temp: -137 °C

Axial Tilt: 2.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.66 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.12

Radius: 1.58

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 0.56 AU - 0.76 AU

Year: 352 Days

Day: 12.9 Hours

Environment

Temp: -138 °C

Axial Tilt: 16 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 51,007,909 km

• M1: 367,861 km (0.098 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.3 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 698.8

Radius: 14.9

Gravity: 3.15 G

Time & Orbit

Eccentricity (e): 0.235

Orbit Range: 0.99 AU - 1.61 AU

Year: 972 Days

Day: 9.6 Hours

Environment

Temp: -170 °C

Axial Tilt: 39.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 51,007,909 km

• M1: 186,249 km (0.061 R)
• M2: 287,378 km (0.093 R)
• M3: 387,010 km (0.107 R)
• M4: 535,860 km (0.11 R)
• M5: 638,633 km (0.115 R)
• M6: 912,397 km (0.095 R)
• M7: 1,121,984 km (0.09 R)
• M8: 1,268,740 km (0.106 R)
• M9: 1,614,311 km (0.035 R)
• M10: 1,749,846 km (0.113 R)
• M11: 1,881,044 km (0.088 R)
• M12: 1,981,723 km (0.116 R)
• M13: 2,180,090 km (0.099 R)
• M14: 2,277,478 km (0.034 R)
• M15: 2,569,194 km (0.053 R)
• M16: 3,000,185 km (0.098 R)
• M17: 3,179,254 km (0.08 R)
• M18: 3,548,013 km (0.118 R)
• M19: 3,705,988 km (0.109 R)
• M20: 4,061,582 km (0.096 R)
• M21: 4,473,724 km (0.079 R)
• M22: 4,587,568 km (0.057 R)
• M23: 4,806,280 km (0.092 R)
• M24: 4,911,148 km (0.104 R)
• M25: 5,459,425 km (0.095 R)
• M26: 5,740,968 km (0.046 R)
• M27: 5,864,835 km (0.059 R)
• M28: 6,077,563 km (0.116 R)
• M29: 6,229,255 km (0.091 R)
• M30: 6,356,713 km (0.063 R)
• M31: 6,562,410 km (0.071 R)
• M32: 6,718,141 km (0.117 R)
• M33: 7,219,593 km (0.079 R)
• M34: 7,461,343 km (0.107 R)
• M35: 7,980,598 km (0.111 R)
• M36: 8,105,362 km (0.06 R)
• M37: 8,230,725 km (0.094 R)
• M38: 8,426,998 km (0.066 R)
• M39: 8,539,944 km (0.089 R)
• M40: 8,795,906 km (0.065 R)
• M41: 9,011,028 km (0.037 R)
• M42: 9,431,996 km (0.086 R)
• M43: 9,534,620 km (0.114 R)
• M44: 9,726,255 km (0.099 R)
• M45: 9,859,547 km (0.115 R)
• M46: 10,068,236 km (0.116 R)
• M47: 10,173,254 km (0.105 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.89 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 391.1

Radius: 13.5

Gravity: 2.15 G

Time & Orbit

Eccentricity (e): 0.125

Orbit Range: 1.65 AU - 2.13 AU

Year: 1705 Days

Day: 9 Hours

Environment

Temp: -177 °C

Axial Tilt: 49.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 51,007,909 km

• M1: 381,624 km (0.117 R)
• M2: 520,900 km (0.032 R)
• M3: 625,917 km (0.03 R)
• M4: 713,582 km (0.072 R)
• M5: 1,174,343 km (0.084 R)
• M6: 1,311,674 km (0.036 R)
• M7: 1,412,054 km (0.054 R)
• M8: 1,532,630 km (0.1 R)
• M9: 1,935,198 km (0.12 R)
• M10: 2,050,837 km (0.093 R)
• M11: 2,168,870 km (0.096 R)
• M12: 2,484,671 km (0.083 R)
• M13: 2,579,217 km (0.118 R)
• M14: 2,696,502 km (0.059 R)
• M15: 2,826,502 km (0.063 R)
• M16: 2,936,606 km (0.1 R)
• M17: 3,025,617 km (0.092 R)
• M18: 3,161,003 km (0.119 R)
• M19: 3,367,897 km (0.074 R)
• M20: 3,484,882 km (0.093 R)
• M21: 3,615,033 km (0.049 R)
• M22: 3,710,775 km (0.09 R)
• M23: 3,807,415 km (0.086 R)
• M24: 3,990,972 km (0.081 R)
• M25: 4,127,405 km (0.071 R)
• M26: 4,215,070 km (0.071 R)
• M27: 4,316,048 km (0.091 R)
• M28: 4,481,803 km (0.053 R)
• M29: 4,859,537 km (0.037 R)
• M30: 5,206,903 km (0.1 R)
• M31: 5,743,361 km (0.063 R)
• M32: 6,025,353 km (0.061 R)
• M33: 6,153,858 km (0.047 R)
• M34: 6,588,440 km (0.04 R)
• M35: 6,958,395 km (0.11 R)
• M36: 7,153,471 km (0.074 R)
• M37: 7,244,127 km (0.091 R)
• M38: 7,335,232 km (0.079 R)
• M39: 7,656,868 km (0.076 R)
• M40: 7,842,818 km (0.1 R)
• M41: 8,156,076 km (0.115 R)
• M42: 8,250,921 km (0.117 R)
• M43: 8,346,065 km (0.099 R)
• M44: 8,617,585 km (0.117 R)
• M45: 8,875,941 km (0.068 R)
• M46: 8,989,785 km (0.101 R)
• M47: 9,268,336 km (0.072 R)
• M48: 9,666,266 km (0.054 R)
• M49: 9,850,571 km (0.099 R)
• M50: 9,951,699 km (0.074 R)
• M51: 10,103,840 km (0.079 R)
• M52: 10,599,608 km (0.054 R)
• M53: 10,772,393 km (0.113 R)
• M54: 11,226,123 km (0.088 R)
• M55: 11,331,740 km (0.118 R)
• M56: 11,561,671 km (0.078 R)
• M57: 11,686,137 km (0.064 R)
• M58: 11,811,051 km (0.071 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.36 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 638

Radius: 12.2

Gravity: 4.29 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 2.19 AU - 2.53 AU

Year: 2378 Days

Day: 6.8 Hours

Environment

Temp: -204 °C

Axial Tilt: 44.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 51,007,909 km

• M1: 152,291 km (0.069 R)
• M2: 339,138 km (0.084 R)
• M3: 453,880 km (0.095 R)
• M4: 665,262 km (0.108 R)
• M5: 828,473 km (0.096 R)
• M6: 910,901 km (0.068 R)
• M7: 996,471 km (0.092 R)
• M8: 1,095,056 km (0.107 R)
• M9: 1,270,684 km (0.076 R)
• M10: 1,400,535 km (0.101 R)
• M11: 1,501,065 km (0.076 R)
• M12: 1,745,358 km (0.091 R)
• M13: 1,866,383 km (0.074 R)
• M14: 2,129,825 km (0.075 R)
• M15: 2,325,648 km (0.117 R)
• M16: 2,513,843 km (0.064 R)
• M17: 2,791,646 km (0.074 R)
• M18: 2,919,851 km (0.112 R)
• M19: 3,271,705 km (0.027 R)
• M20: 3,361,913 km (0.063 R)
• M21: 3,621,914 km (0.1 R)
• M22: 3,825,218 km (0.081 R)
• M23: 4,048,567 km (0.115 R)
• M24: 4,210,582 km (0.08 R)
• M25: 4,292,561 km (0.1 R)
• M26: 4,474,622 km (0.072 R)
• M27: 4,778,006 km (0.105 R)
• M28: 4,915,188 km (0.12 R)
• M29: 5,245,949 km (0.087 R)
• M30: 5,856,158 km (0.088 R)
• M31: 5,966,262 km (0.07 R)
• M32: 6,338,163 km (0.12 R)
• M33: 6,602,951 km (0.074 R)
• M34: 6,832,883 km (0.1 R)
• M35: 6,968,269 km (0.112 R)
• M36: 7,202,389 km (0.091 R)
• M37: 7,538,536 km (0.055 R)
• M38: 7,920,459 km (0.086 R)
• M39: 8,021,887 km (0.047 R)
• M40: 8,308,666 km (0.118 R)
• M41: 8,577,942 km (0.111 R)
• M42: 8,850,060 km (0.12 R)
• M43: 9,040,050 km (0.115 R)
• M44: 9,966,958 km (0.082 R)
• M45: 10,430,562 km (0.104 R)
• M46: 10,519,722 km (0.034 R)
• M47: 10,743,670 km (0.104 R)
• M48: 10,856,168 km (0.077 R)
• M49: 11,037,181 km (0.084 R)
• M50: 11,150,726 km (0.116 R)
• M51: 11,264,720 km (0.045 R)
• M52: 11,402,051 km (0.084 R)
• M53: 11,562,868 km (0.087 R)
• M54: 11,724,434 km (0.081 R)
• M55: 12,073,446 km (0.108 R)
• M56: 12,190,431 km (0.115 R)
• M57: 12,449,385 km (0.069 R)
• M58: 12,876,936 km (0.115 R)
• M59: 13,164,762 km (0.069 R)
• M60: 13,309,423 km (0.098 R)
• M61: 13,406,213 km (0.104 R)
• M62: 13,746,548 km (0.087 R)
• M63: 13,917,987 km (0.094 R)
• M64: 14,510,694 km (0.039 R)
• M65: 14,860,304 km (0.054 R)
• M66: 15,036,082 km (0.063 R)
• M67: 15,187,475 km (0.117 R)
• M68: 15,720,941 km (0.116 R)
• M69: 16,806,274 km (0.046 R)
• M70: 17,042,040 km (0.084 R)
• M71: 17,305,182 km (0.034 R)
• M72: 17,490,235 km (0.053 R)
• M73: 17,649,407 km (0.099 R)
• M74: 17,729,143 km (0.094 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 346.9

Radius: 13.5

Gravity: 1.9 G

Time & Orbit

Eccentricity (e): 0.122

Orbit Range: 3.2 AU - 4.1 AU

Year: 4575 Days

Day: 9.8 Hours

Environment

Temp: -217 °C

Axial Tilt: 23 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (64)

Outer Limit: 51,007,909 km

• M1: 190,438 km (0.111 R)
• M2: 397,332 km (0.118 R)
• M3: 490,531 km (0.108 R)
• M4: 658,380 km (0.09 R)
• M5: 1,023,100 km (0.08 R)
• M6: 1,297,163 km (0.101 R)
• M7: 1,595,312 km (0.118 R)
• M8: 1,930,561 km (0.099 R)
• M9: 2,076,867 km (0.113 R)
• M10: 2,181,735 km (0.067 R)
• M11: 2,319,216 km (0.103 R)
• M12: 2,443,831 km (0.079 R)
• M13: 2,554,832 km (0.085 R)
• M14: 2,651,473 km (0.071 R)
• M15: 3,067,205 km (0.067 R)
• M16: 3,170,128 km (0.116 R)
• M17: 3,291,602 km (0.096 R)
• M18: 3,468,127 km (0.069 R)
• M19: 3,647,794 km (0.082 R)
• M20: 3,979,004 km (0.118 R)
• M21: 4,377,982 km (0.103 R)
• M22: 4,572,609 km (0.112 R)
• M23: 4,810,020 km (0.105 R)
• M24: 4,950,343 km (0.118 R)
• M25: 5,504,603 km (0.11 R)
• M26: 5,757,424 km (0.094 R)
• M27: 5,842,545 km (0.086 R)
• M28: 6,605,344 km (0.094 R)
• M29: 6,806,554 km (0.115 R)
• M30: 6,964,529 km (0.105 R)
• M31: 7,146,589 km (0.091 R)
• M32: 7,867,053 km (0.111 R)
• M33: 8,128,251 km (0.106 R)
• M34: 8,464,846 km (0.064 R)
• M35: 8,732,626 km (0.03 R)
• M36: 8,879,980 km (0.107 R)
• M37: 9,152,099 km (0.076 R)
• M38: 9,502,307 km (0.065 R)
• M39: 9,755,277 km (0.071 R)
• M40: 9,984,910 km (0.105 R)
• M41: 12,571,008 km (0.057 R)
• M42: 12,960,561 km (0.115 R)
• M43: 13,580,943 km (0.118 R)
• M44: 13,866,077 km (0.058 R)
• M45: 14,529,544 km (0.075 R)
• M46: 14,997,187 km (0.081 R)
• M47: 15,144,391 km (0.108 R)
• M48: 15,588,697 km (0.108 R)
• M49: 16,157,767 km (0.063 R)
• M50: 16,308,711 km (0.071 R)
• M51: 16,399,517 km (0.116 R)
• M52: 16,886,458 km (0.102 R)
• M53: 17,008,979 km (0.112 R)
• M54: 18,596,362 km (0.097 R)
• M55: 18,754,487 km (0.068 R)
• M56: 19,423,788 km (0.044 R)
• M57: 19,874,376 km (0.115 R)
• M58: 20,360,869 km (0.042 R)
• M59: 20,458,706 km (0.032 R)
• M60: 20,654,828 km (0.094 R)
• M61: 21,577,847 km (0.05 R)
• M62: 21,944,212 km (0.102 R)
• M63: 22,279,162 km (0.085 R)
• M64: 22,413,501 km (0.034 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.82 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 721.2

Radius: 8.4

Gravity: 10.22 G

Time & Orbit

Eccentricity (e): 0.235

Orbit Range: 3.69 AU - 5.95 AU

Year: 6942 Days

Day: 11.5 Hours

Environment

Temp: -217 °C

Axial Tilt: 18.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 51,007,909 km

• M1: 114,143 km (0.109 R)
• M2: 693,087 km (0.114 R)
• M3: 841,039 km (0.109 R)
• M4: 1,274,125 km (0.1 R)
• M5: 1,328,279 km (0.102 R)
• M6: 2,123,093 km (0.08 R)
• M7: 2,363,796 km (0.058 R)
• M8: 2,567,399 km (0.111 R)
• M9: 2,683,038 km (0.062 R)
• M10: 2,753,199 km (0.081 R)
• M11: 3,016,043 km (0.105 R)
• M12: 3,591,546 km (0.113 R)
• M13: 3,825,966 km (0.077 R)
• M14: 4,092,399 km (0.119 R)
• M15: 4,309,915 km (0.059 R)
• M16: 4,475,519 km (0.08 R)
• M17: 4,756,315 km (0.062 R)
• M18: 4,813,162 km (0.101 R)
• M19: 5,246,697 km (0.102 R)
• M20: 5,602,590 km (0.119 R)
• M21: 5,692,797 km (0.081 R)
• M22: 6,213,248 km (0.068 R)
• M23: 6,337,863 km (0.118 R)
• M24: 6,400,545 km (0.088 R)
• M25: 6,621,501 km (0.109 R)
• M26: 7,364,853 km (0.092 R)
• M27: 7,763,232 km (0.088 R)
• M28: 7,863,911 km (0.085 R)
• M29: 8,719,910 km (0.073 R)
• M30: 8,894,790 km (0.053 R)
• M31: 9,318,900 km (0.11 R)
• M32: 10,040,411 km (0.059 R)
• M33: 11,384,099 km (0.094 R)
• M34: 11,690,326 km (0.101 R)
• M35: 11,921,754 km (0.11 R)
• M36: 14,690,511 km (0.039 R)
• M37: 15,359,662 km (0.116 R)
• M38: 15,528,558 km (0.117 R)
• M39: 15,613,231 km (0.107 R)
• M40: 16,425,248 km (0.045 R)
• M41: 17,251,028 km (0.083 R)
• M42: 17,779,557 km (0.058 R)
• M43: 17,868,119 km (0.069 R)
• M44: 18,090,272 km (0.079 R)
• M45: 18,492,391 km (0.093 R)
• M46: 18,582,150 km (0.053 R)
• M47: 18,762,116 km (0.057 R)
• M48: 18,987,859 km (0.097 R)
• M49: 19,169,172 km (0.119 R)
• M50: 20,315,241 km (0.073 R)
• M51: 20,919,916 km (0.072 R)
• M52: 21,861,634 km (0.106 R)
• M53: 22,577,011 km (0.037 R)
• M54: 22,673,053 km (0.097 R)
• M55: 23,300,168 km (0.088 R)
• M56: 25,364,917 km (0.063 R)
• M57: 25,514,665 km (0.107 R)
• M58: 25,764,792 km (0.065 R)
• M59: 26,166,762 km (0.106 R)
• M60: 26,419,134 km (0.095 R)
• M61: 26,672,104 km (0.032 R)
• M62: 27,590,036 km (0.12 R)
• M63: 29,666,455 km (0.093 R)
• M64: 30,352,062 km (0.077 R)
• M65: 31,203,124 km (0.065 R)
• M66: 33,255,607 km (0.038 R)
• M67: 33,310,210 km (0.058 R)
• M68: 33,364,813 km (0.12 R)
• M69: 34,463,609 km (0.109 R)
• M70: 35,239,873 km (0.072 R)
• M71: 36,302,616 km (0.076 R)
• M72: 36,527,611 km (0.07 R)
• M73: 36,640,408 km (0.116 R)
• M74: 37,375,831 km (0.099 R)
• M75: 38,058,895 km (0.111 R)
• M76: 38,230,334 km (0.113 R)

Planet 8 - Ice Giant

Semi-Major Axis: 6.22 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 797.1

Radius: 6.3

Gravity: 20.08 G

Time & Orbit

Eccentricity (e): 0.137

Orbit Range: 5.37 AU - 7.07 AU

Year: 10176 Days

Day: 18 Hours

Environment

Temp: -231 °C

Axial Tilt: 42.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 51,007,909 km

• M1: 329,863 km (0.057 R)
• M2: 369,956 km (0.107 R)
• M3: 753,225 km (0.105 R)
• M4: 883,675 km (0.087 R)
• M5: 1,340,397 km (0.117 R)
• M6: 1,811,181 km (0.065 R)
• M7: 2,195,498 km (0.074 R)
• M8: 3,156,216 km (0.068 R)
• M9: 3,216,354 km (0.111 R)
• M10: 3,679,659 km (0.065 R)
• M11: 3,743,088 km (0.092 R)
• M12: 3,967,784 km (0.09 R)
• M13: 4,098,084 km (0.081 R)
• M14: 4,667,902 km (0.056 R)
• M15: 5,441,623 km (0.07 R)
• M16: 5,769,541 km (0.099 R)
• M17: 6,178,990 km (0.072 R)
• M18: 6,482,824 km (0.027 R)
• M19: 6,559,418 km (0.037 R)
• M20: 8,868,760 km (0.078 R)
• M21: 9,168,255 km (0.064 R)
• M22: 9,558,107 km (0.09 R)
• M23: 10,533,635 km (0.04 R)
• M24: 11,914,423 km (0.098 R)
• M25: 12,292,158 km (0.036 R)
• M26: 12,387,152 km (0.109 R)
• M27: 13,497,767 km (0.095 R)
• M28: 13,792,624 km (0.108 R)
• M29: 13,940,876 km (0.106 R)
• M30: 14,040,059 km (0.097 R)
• M31: 14,288,990 km (0.114 R)
• M32: 15,401,250 km (0.025 R)
• M33: 17,015,112 km (0.09 R)
• M34: 17,280,499 km (0.063 R)
• M35: 17,493,676 km (0.105 R)
• M36: 18,464,117 km (0.109 R)
• M37: 19,120,702 km (0.107 R)
• M38: 21,022,241 km (0.071 R)
• M39: 21,592,957 km (0.112 R)
• M40: 21,822,589 km (0.08 R)
• M41: 22,168,609 km (0.117 R)
• M42: 22,342,442 km (0.105 R)
• M43: 22,924,677 km (0.113 R)
• M44: 23,100,305 km (0.12 R)
• M45: 23,394,115 km (0.116 R)
• M46: 23,453,057 km (0.043 R)
• M47: 23,689,122 km (0.091 R)
• M48: 24,701,301 km (0.105 R)
• M49: 25,363,870 km (0.112 R)
• M50: 25,484,895 km (0.038 R)
• M51: 26,032,124 km (0.084 R)
• M52: 27,138,251 km (0.116 R)
• M53: 27,696,999 km (0.118 R)
• M54: 28,071,592 km (0.09 R)
• M55: 28,952,274 km (0.094 R)
• M56: 30,225,951 km (0.081 R)
• M57: 30,290,128 km (0.113 R)
• M58: 31,582,953 km (0.112 R)
• M59: 34,289,178 km (0.095 R)
• M60: 34,691,297 km (0.053 R)
• M61: 34,960,424 km (0.116 R)
• M62: 35,095,062 km (0.087 R)
• M63: 35,162,531 km (0.06 R)
• M64: 35,365,236 km (0.08 R)
• M65: 35,771,544 km (0.04 R)
• M66: 36,452,214 km (0.1 R)
• M67: 36,588,946 km (0.054 R)
• M68: 37,068,557 km (0.093 R)
• M69: 38,103,326 km (0.105 R)
• M70: 38,589,519 km (0.055 R)
• M71: 38,798,507 km (0.103 R)
• M72: 39,217,680 km (0.05 R)
• M73: 39,287,692 km (0.054 R)
• M74: 39,357,704 km (0.102 R)
• M75: 40,979,943 km (0.116 R)
• M76: 41,478,104 km (0.091 R)
• M77: 41,835,045 km (0.111 R)
• M78: 42,264,839 km (0.044 R)
• M79: 43,128,617 km (0.103 R)
• M80: 43,200,873 km (0.047 R)
• M81: 43,417,940 km (0.09 R)
• M82: 43,562,750 km (0.106 R)
• M83: 43,852,970 km (0.112 R)
• M84: 44,435,355 km (0.108 R)
• M85: 44,581,362 km (0.103 R)
• M86: 46,271,669 km (0.039 R)
• M87: 47,236,276 km (0.057 R)
• M88: 47,833,321 km (0.093 R)
• M89: 48,207,615 km (0.11 R)
• M90: 49,638,967 km (0.091 R)
• M91: 50,245,886 km (0.117 R)
• M92: 50,321,881 km (0.09 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 414 - 14,335 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit