🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.01 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 5

Radius: 1.9

Gravity: 1.39 G

Time & Orbit

Eccentricity (e): 0.144

Orbit Range: 0.86 AU - 1.16 AU

Year: 376 Days

Day: 19.9 Hours

Environment

Temp: 25 °C

Axial Tilt: 34.4 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (2)

Outer Limit: 75,875,789 km

• M1: 159,023 km (0.094 R)
• M2: 857,196 km (0.108 R)

Planet 2 - Terrestrial

Semi-Major Axis: 2.66 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.89

Radius: 1.29

Gravity: 1.14 G

Time & Orbit

Eccentricity (e): 0.1

Orbit Range: 2.39 AU - 2.93 AU

Year: 1609 Days

Day: 14.4 Hours

Environment

Temp: -104 °C

Axial Tilt: 33 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 3.03 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.43

Radius: 1.81

Gravity: 1.35 G

Time & Orbit

Eccentricity (e): 0.024

Orbit Range: 2.96 AU - 3.1 AU

Year: 1956 Days

Day: 39.1 Hours

Environment

Temp: -108 °C

Axial Tilt: 45.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 3.74 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.55

Radius: 0.79

Gravity: 0.88 G

Time & Orbit

Eccentricity (e): 0.173

Orbit Range: 3.09 AU - 4.39 AU

Year: 2682 Days

Day: 17.7 Hours

Environment

Temp: -130 °C

Axial Tilt: 2.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 3.91 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.25

Radius: 1.38

Gravity: 1.18 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 3.32 AU - 4.5 AU

Year: 2867 Days

Day: 45.6 Hours

Environment

Temp: -122 °C

Axial Tilt: 12.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 4.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 175.2

Radius: 10.3

Gravity: 1.65 G

Time & Orbit

Eccentricity (e): 0.135

Orbit Range: 4.13 AU - 5.41 AU

Year: 3864 Days

Day: 8.5 Hours

Environment

Temp: -134 °C

Axial Tilt: 45.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (63)

Outer Limit: 75,875,789 km

• M1: 128,654 km (0.061 R)
• M2: 232,924 km (0.086 R)
• M3: 363,373 km (0.108 R)
• M4: 463,604 km (0.052 R)
• M5: 560,394 km (0.072 R)
• M6: 649,704 km (0.078 R)
• M7: 957,875 km (0.1 R)
• M8: 1,105,229 km (0.104 R)
• M9: 1,230,592 km (0.109 R)
• M10: 1,433,297 km (0.03 R)
• M11: 1,570,927 km (0.12 R)
• M12: 1,802,954 km (0.049 R)
• M13: 2,046,050 km (0.105 R)
• M14: 2,129,526 km (0.118 R)
• M15: 2,214,198 km (0.073 R)
• M16: 2,337,168 km (0.108 R)
• M17: 2,500,379 km (0.078 R)
• M18: 2,732,854 km (0.074 R)
• M19: 2,825,156 km (0.028 R)
• M20: 2,985,824 km (0.103 R)
• M21: 3,191,072 km (0.085 R)
• M22: 3,486,229 km (0.068 R)
• M23: 3,601,120 km (0.073 R)
• M24: 3,775,701 km (0.042 R)
• M25: 4,455,324 km (0.092 R)
• M26: 4,564,381 km (0.102 R)
• M27: 4,865,222 km (0.068 R)
• M28: 4,961,563 km (0.111 R)
• M29: 5,139,884 km (0.114 R)
• M30: 5,270,931 km (0.038 R)
• M31: 5,553,073 km (0.089 R)
• M32: 5,942,626 km (0.119 R)
• M33: 6,306,149 km (0.118 R)
• M34: 6,446,621 km (0.116 R)
• M35: 6,534,884 km (0.062 R)
• M36: 6,892,124 km (0.063 R)
• M37: 6,964,379 km (0.074 R)
• M38: 7,719,101 km (0.118 R)
• M39: 8,020,690 km (0.093 R)
• M40: 8,134,833 km (0.1 R)
• M41: 8,287,722 km (0.102 R)
• M42: 8,928,899 km (0.118 R)
• M43: 9,066,977 km (0.115 R)
• M44: 9,245,597 km (0.097 R)
• M45: 9,687,061 km (0.034 R)
• M46: 9,971,596 km (0.106 R)
• M47: 10,507,306 km (0.112 R)
• M48: 10,757,732 km (0.095 R)
• M49: 11,137,113 km (0.108 R)
• M50: 11,800,729 km (0.028 R)
• M51: 11,952,421 km (0.066 R)
• M52: 12,148,245 km (0.115 R)
• M53: 12,521,342 km (0.081 R)
• M54: 12,853,599 km (0.094 R)
• M55: 13,572,117 km (0.119 R)
• M56: 13,662,774 km (0.064 R)
• M57: 13,753,729 km (0.041 R)
• M58: 14,027,792 km (0.107 R)
• M59: 14,418,991 km (0.105 R)
• M60: 14,884,091 km (0.082 R)
• M61: 15,283,218 km (0.071 R)
• M62: 15,567,005 km (0.112 R)
• M63: 15,661,999 km (0.091 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.31 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 139.8

Radius: 12.1

Gravity: 0.95 G

Time & Orbit

Eccentricity (e): 0.22

Orbit Range: 4.14 AU - 6.48 AU

Year: 4538 Days

Day: 9.3 Hours

Environment

Temp: -150 °C

Axial Tilt: 26.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 75,875,789 km

• M1: 172,187 km (0.094 R)
• M2: 287,527 km (0.092 R)
• M3: 375,191 km (0.077 R)
• M4: 524,191 km (0.116 R)
• M5: 680,521 km (0.083 R)
• M6: 761,154 km (0.097 R)
• M7: 897,886 km (0.061 R)
• M8: 1,109,867 km (0.112 R)
• M9: 1,237,324 km (0.112 R)
• M10: 1,464,563 km (0.098 R)
• M11: 1,572,573 km (0.106 R)
• M12: 1,773,932 km (0.112 R)
• M13: 1,854,565 km (0.084 R)
• M14: 1,960,181 km (0.084 R)
• M15: 2,289,595 km (0.111 R)
• M16: 2,390,574 km (0.117 R)
• M17: 2,558,124 km (0.102 R)
• M18: 2,689,620 km (0.057 R)
• M19: 2,877,665 km (0.076 R)
• M20: 3,042,372 km (0.113 R)
• M21: 3,125,848 km (0.12 R)
• M22: 3,224,433 km (0.12 R)
• M23: 3,658,266 km (0.072 R)
• M24: 4,080,132 km (0.066 R)
• M25: 4,234,667 km (0.026 R)
• M26: 4,549,570 km (0.042 R)
• M27: 4,693,783 km (0.117 R)
• M28: 4,872,103 km (0.081 R)
• M29: 5,135,695 km (0.104 R)
• M30: 5,235,776 km (0.117 R)
• M31: 5,336,455 km (0.114 R)
• M32: 5,711,198 km (0.117 R)
• M33: 5,814,869 km (0.043 R)
• M34: 5,971,648 km (0.053 R)
• M35: 6,342,950 km (0.091 R)
• M36: 6,813,285 km (0.073 R)
• M37: 7,015,542 km (0.051 R)
• M38: 7,126,843 km (0.098 R)
• M39: 7,464,036 km (0.084 R)
• M40: 7,558,582 km (0.087 R)
• M41: 7,710,873 km (0.057 R)
• M42: 8,388,850 km (0.067 R)
• M43: 8,487,286 km (0.084 R)
• M44: 8,586,020 km (0.062 R)
• M45: 8,945,055 km (0.1 R)
• M46: 9,166,759 km (0.087 R)
• M47: 9,349,568 km (0.118 R)
• M48: 9,636,496 km (0.101 R)
• M49: 9,905,324 km (0.109 R)
• M50: 10,239,825 km (0.046 R)
• M51: 10,493,094 km (0.1 R)
• M52: 11,330,543 km (0.085 R)
• M53: 11,526,965 km (0.114 R)
• M54: 11,614,479 km (0.109 R)
• M55: 11,790,407 km (0.093 R)
• M56: 12,345,863 km (0.118 R)
• M57: 12,592,999 km (0.043 R)
• M58: 13,829,874 km (0.1 R)
• M59: 13,923,074 km (0.08 R)
• M60: 14,016,423 km (0.103 R)
• M61: 14,227,206 km (0.114 R)
• M62: 14,344,790 km (0.104 R)
• M63: 14,510,096 km (0.104 R)
• M64: 14,794,631 km (0.12 R)
• M65: 14,985,518 km (0.078 R)
• M66: 15,369,536 km (0.111 R)
• M67: 15,466,026 km (0.083 R)
• M68: 15,951,771 km (0.115 R)
• M69: 16,442,452 km (0.079 R)

Planet 8 - Gas Giant

Semi-Major Axis: 8.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 435.6

Radius: 10.7

Gravity: 3.8 G

Time & Orbit

Eccentricity (e): 0.132

Orbit Range: 6.95 AU - 9.07 AU

Year: 8407 Days

Day: 8.1 Hours

Environment

Temp: -167 °C

Axial Tilt: 0.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 75,875,789 km

• M1: 136,284 km (0.12 R)
• M2: 244,443 km (0.115 R)
• M3: 313,707 km (0.081 R)
• M4: 382,971 km (0.12 R)
• M5: 617,839 km (0.091 R)
• M6: 854,653 km (0.092 R)
• M7: 1,007,841 km (0.092 R)
• M8: 1,578,407 km (0.115 R)
• M9: 1,887,626 km (0.105 R)
• M10: 1,988,156 km (0.075 R)
• M11: 2,258,479 km (0.073 R)
• M12: 2,811,243 km (0.088 R)
• M13: 2,880,507 km (0.06 R)
• M14: 3,259,139 km (0.043 R)
• M15: 3,578,531 km (0.084 R)
• M16: 4,706,050 km (0.118 R)
• M17: 5,123,727 km (0.088 R)
• M18: 5,294,269 km (0.096 R)
• M19: 5,787,343 km (0.115 R)
• M20: 5,875,905 km (0.091 R)
• M21: 5,965,065 km (0.102 R)
• M22: 6,234,790 km (0.109 R)
• M23: 6,600,856 km (0.078 R)
• M24: 7,417,960 km (0.042 R)
• M25: 7,514,301 km (0.07 R)
• M26: 7,675,867 km (0.083 R)
• M27: 7,871,092 km (0.091 R)
• M28: 8,101,173 km (0.083 R)
• M29: 8,400,220 km (0.111 R)
• M30: 8,567,769 km (0.081 R)
• M31: 8,838,392 km (0.095 R)
• M32: 9,388,164 km (0.054 R)
• M33: 9,562,296 km (0.112 R)
• M34: 9,632,158 km (0.117 R)
• M35: 10,340,953 km (0.091 R)
• M36: 10,448,663 km (0.106 R)
• M37: 12,604,668 km (0.058 R)
• M38: 13,930,404 km (0.038 R)
• M39: 14,328,783 km (0.045 R)
• M40: 15,055,380 km (0.104 R)
• M41: 15,177,602 km (0.063 R)
• M42: 16,334,592 km (0.074 R)
• M43: 16,544,178 km (0.118 R)
• M44: 16,670,289 km (0.037 R)
• M45: 18,079,501 km (0.12 R)
• M46: 18,557,616 km (0.116 R)
• M47: 18,644,981 km (0.114 R)
• M48: 19,216,445 km (0.051 R)
• M49: 19,526,412 km (0.08 R)
• M50: 19,659,853 km (0.114 R)
• M51: 20,511,663 km (0.119 R)
• M52: 21,513,071 km (0.065 R)
• M53: 21,650,851 km (0.093 R)
• M54: 21,742,854 km (0.095 R)
• M55: 22,112,211 km (0.111 R)
• M56: 23,185,725 km (0.113 R)
• M57: 24,659,563 km (0.079 R)
• M58: 24,851,797 km (0.089 R)
• M59: 25,092,948 km (0.058 R)
• M60: 25,723,653 km (0.102 R)
• M61: 26,310,376 km (0.087 R)
• M62: 26,408,662 km (0.06 R)
• M63: 26,802,852 km (0.093 R)
• M64: 27,000,620 km (0.118 R)
• M65: 27,149,321 km (0.12 R)
• M66: 27,746,665 km (0.05 R)
• M67: 29,360,826 km (0.089 R)
• M68: 29,769,228 km (0.097 R)
• M69: 30,385,123 km (0.079 R)
• M70: 31,109,027 km (0.098 R)
• M71: 31,577,567 km (0.104 R)
• M72: 32,153,220 km (0.114 R)
• M73: 34,759,364 km (0.113 R)
• M74: 36,388,336 km (0.106 R)
• M75: 36,662,249 km (0.041 R)

Planet 9 - Gas Giant

Semi-Major Axis: 11.19 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 844

Radius: 13

Gravity: 4.99 G

Time & Orbit

Eccentricity (e): 0.05

Orbit Range: 10.63 AU - 11.75 AU

Year: 13882 Days

Day: 8.5 Hours

Environment

Temp: -182 °C

Axial Tilt: 29.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 75,875,789 km

• M1: 303,085 km (0.107 R)
• M2: 615,595 km (0.073 R)
• M3: 874,848 km (0.093 R)
• M4: 1,075,758 km (0.059 R)
• M5: 1,498,073 km (0.04 R)
• M6: 1,855,313 km (0.088 R)
• M7: 2,029,295 km (0.11 R)
• M8: 2,616,766 km (0.113 R)
• M9: 2,980,588 km (0.11 R)
• M10: 3,082,614 km (0.074 R)
• M11: 3,538,738 km (0.054 R)
• M12: 3,647,196 km (0.1 R)
• M13: 3,793,353 km (0.053 R)
• M14: 4,514,714 km (0.079 R)
• M15: 4,672,091 km (0.098 R)
• M16: 6,300,015 km (0.066 R)
• M17: 7,755,154 km (0.112 R)
• M18: 7,991,668 km (0.12 R)
• M19: 9,209,993 km (0.034 R)
• M20: 9,713,539 km (0.06 R)
• M21: 10,329,733 km (0.103 R)
• M22: 10,958,642 km (0.106 R)
• M23: 12,974,923 km (0.062 R)
• M24: 13,596,202 km (0.106 R)
• M25: 13,767,342 km (0.11 R)
• M26: 15,044,160 km (0.107 R)
• M27: 15,936,362 km (0.086 R)
• M28: 16,056,639 km (0.073 R)
• M29: 16,298,090 km (0.111 R)
• M30: 16,480,001 km (0.119 R)
• M31: 16,784,582 km (0.09 R)
• M32: 17,834,310 km (0.069 R)
• M33: 18,714,694 km (0.104 R)
• M34: 21,439,918 km (0.038 R)
• M35: 21,972,935 km (0.118 R)
• M36: 22,712,996 km (0.077 R)
• M37: 22,848,532 km (0.093 R)
• M38: 23,188,268 km (0.114 R)
• M39: 23,324,702 km (0.106 R)
• M40: 24,217,651 km (0.088 R)
• M41: 24,912,234 km (0.044 R)
• M42: 25,191,833 km (0.116 R)
• M43: 25,683,860 km (0.085 R)
• M44: 26,249,938 km (0.118 R)
• M45: 26,463,265 km (0.048 R)
• M46: 30,401,130 km (0.106 R)
• M47: 32,972,717 km (0.07 R)
• M48: 33,896,933 km (0.071 R)
• M49: 34,051,767 km (0.073 R)
• M50: 34,517,764 km (0.054 R)
• M51: 35,220,874 km (0.081 R)
• M52: 35,692,107 km (0.07 R)
• M53: 36,244,572 km (0.112 R)
• M54: 36,959,052 km (0.1 R)
• M55: 37,278,144 km (0.042 R)
• M56: 38,079,839 km (0.1 R)
• M57: 38,402,073 km (0.12 R)
• M58: 39,130,465 km (0.105 R)
• M59: 40,272,495 km (0.071 R)
• M60: 41,839,981 km (0.096 R)
• M61: 41,923,008 km (0.119 R)
• M62: 42,172,537 km (0.093 R)
• M63: 42,756,567 km (0.102 R)
• M64: 43,848,333 km (0.113 R)
• M65: 44,609,636 km (0.08 R)
• M66: 45,204,737 km (0.087 R)
• M67: 46,574,754 km (0.119 R)
• M68: 46,833,109 km (0.059 R)
• M69: 47,871,618 km (0.115 R)
• M70: 49,443,443 km (0.115 R)
• M71: 50,235,713 km (0.107 R)
• M72: 51,032,172 km (0.1 R)
• M73: 51,387,467 km (0.117 R)
• M74: 51,476,328 km (0.078 R)
• M75: 52,011,140 km (0.09 R)
• M76: 52,368,829 km (0.104 R)
• M77: 53,176,358 km (0.086 R)
• M78: 54,894,639 km (0.107 R)
• M79: 56,080,801 km (0.096 R)
• M80: 56,447,615 km (0.12 R)
• M81: 58,664,356 km (0.111 R)
• M82: 60,345,537 km (0.085 R)
• M83: 61,192,111 km (0.108 R)
• M84: 62,042,575 km (0.095 R)
• M85: 62,137,271 km (0.116 R)

Planet 10 - Ice Giant

Semi-Major Axis: 19.34 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 273.1

Radius: 7.6

Gravity: 4.73 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 15.24 AU - 23.44 AU

Year: 31542 Days

Day: 19.2 Hours

Environment

Temp: -201 °C

Axial Tilt: 33.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 75,875,789 km

• M1: 170,242 km (0.063 R)
• M2: 412,292 km (0.061 R)
• M3: 590,762 km (0.118 R)
• M4: 1,292,825 km (0.063 R)
• M5: 1,650,962 km (0.081 R)
• M6: 2,072,828 km (0.065 R)
• M7: 2,348,537 km (0.114 R)
• M8: 2,527,007 km (0.11 R)
• M9: 2,973,108 km (0.108 R)
• M10: 3,284,122 km (0.054 R)
• M11: 3,443,593 km (0.093 R)
• M12: 4,235,565 km (0.043 R)
• M13: 4,763,795 km (0.085 R)
• M14: 5,785,548 km (0.109 R)
• M15: 6,075,768 km (0.108 R)
• M16: 6,720,684 km (0.116 R)
• M17: 6,771,248 km (0.106 R)
• M18: 7,544,071 km (0.106 R)
• M19: 7,861,069 km (0.086 R)
• M20: 8,508,080 km (0.101 R)
• M21: 8,562,833 km (0.09 R)
• M22: 8,893,444 km (0.073 R)
• M23: 8,948,945 km (0.114 R)
• M24: 9,060,245 km (0.104 R)
• M25: 9,397,140 km (0.057 R)
• M26: 9,795,369 km (0.09 R)
• M27: 9,852,815 km (0.119 R)
• M28: 10,432,357 km (0.084 R)
• M29: 11,563,915 km (0.102 R)
• M30: 12,733,920 km (0.114 R)
• M31: 13,174,486 km (0.099 R)
• M32: 13,555,961 km (0.115 R)
• M33: 13,684,016 km (0.052 R)
• M34: 15,052,089 km (0.101 R)
• M35: 15,184,633 km (0.109 R)
• M36: 15,584,657 km (0.116 R)
• M37: 15,853,335 km (0.072 R)
• M38: 16,191,277 km (0.117 R)
• M39: 16,599,829 km (0.089 R)
• M40: 16,874,191 km (0.058 R)
• M41: 17,288,428 km (0.109 R)
• M42: 17,566,530 km (0.052 R)
• M43: 17,636,243 km (0.056 R)
• M44: 17,916,290 km (0.11 R)
• M45: 19,916,413 km (0.112 R)
• M46: 20,354,286 km (0.116 R)
• M47: 21,537,157 km (0.083 R)
• M48: 21,761,404 km (0.077 R)
• M49: 22,061,647 km (0.082 R)
• M50: 23,199,638 km (0.096 R)
• M51: 24,512,509 km (0.06 R)
• M52: 25,928,453 km (0.026 R)
• M53: 26,326,532 km (0.082 R)
• M54: 26,406,418 km (0.044 R)
• M55: 26,726,707 km (0.115 R)
• M56: 28,921,607 km (0.065 R)
• M57: 30,584,387 km (0.056 R)
• M58: 31,342,848 km (0.052 R)
• M59: 34,089,016 km (0.071 R)
• M60: 34,612,459 km (0.082 R)
• M61: 35,138,445 km (0.027 R)
• M62: 35,755,686 km (0.049 R)
• M63: 35,932,661 km (0.083 R)
• M64: 36,376,368 km (0.112 R)
• M65: 38,440,669 km (0.078 R)
• M66: 38,803,593 km (0.075 R)
• M67: 39,441,479 km (0.101 R)
• M68: 41,561,430 km (0.099 R)
• M69: 41,933,779 km (0.086 R)
• M70: 43,623,487 km (0.104 R)
• M71: 46,585,375 km (0.096 R)
• M72: 46,682,016 km (0.111 R)
• M73: 47,457,381 km (0.072 R)
• M74: 47,554,620 km (0.085 R)
• M75: 48,041,711 km (0.116 R)
• M76: 50,799,847 km (0.109 R)
• M77: 51,397,640 km (0.11 R)
• M78: 52,700,637 km (0.109 R)
• M79: 53,710,273 km (0.112 R)
• M80: 55,134,594 km (0.091 R)
• M81: 55,851,318 km (0.102 R)
• M82: 56,159,489 km (0.064 R)
• M83: 56,468,259 km (0.055 R)
• M84: 58,540,639 km (0.114 R)
• M85: 58,958,166 km (0.104 R)
• M86: 59,481,310 km (0.106 R)
• M87: 60,954,550 km (0.101 R)
• M88: 62,439,758 km (0.116 R)
• M89: 65,013,439 km (0.055 R)
• M90: 65,879,013 km (0.095 R)
• M91: 66,748,476 km (0.089 R)
• M92: 67,075,496 km (0.1 R)
• M93: 67,184,553 km (0.101 R)
• M94: 71,932,341 km (0.036 R)
• M95: 73,951,613 km (0.091 R)
• M96: 74,290,003 km (0.112 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 524 - 13,147 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit