🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.36 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 70.7

Radius: 9.9

Gravity: 0.72 G

Time & Orbit

Eccentricity (e): 0.135

Orbit Range: 0.62 AU - 0.82 AU

Year: 394 Days

Day: 11.2 Hours

Environment

Temp: -138 °C

Axial Tilt: 11 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (27)

Outer Limit: 76,016,987 km

• M1: 131,796 km (0.041 R)
• M2: 216,169 km (0.084 R)
• M3: 295,605 km (0.104 R)
• M4: 367,113 km (0.097 R)
• M5: 444,605 km (0.029 R)
• M6: 531,072 km (0.075 R)
• M7: 623,973 km (0.106 R)
• M8: 746,344 km (0.086 R)
• M9: 813,364 km (0.115 R)
• M10: 902,674 km (0.09 R)
• M11: 979,716 km (0.108 R)
• M12: 1,064,688 km (0.117 R)
• M13: 1,127,370 km (0.058 R)
• M14: 1,194,240 km (0.08 R)
• M15: 1,259,614 km (0.101 R)
• M16: 1,326,185 km (0.103 R)
• M17: 1,445,115 km (0.058 R)
• M18: 1,508,994 km (0.093 R)
• M19: 1,592,469 km (0.119 R)
• M20: 1,674,599 km (0.073 R)
• M21: 1,800,410 km (0.048 R)
• M22: 1,986,660 km (0.114 R)
• M23: 2,075,371 km (0.045 R)
• M24: 2,260,274 km (0.113 R)
• M25: 2,367,386 km (0.085 R)
• M26: 2,443,382 km (0.107 R)
• M27: 2,516,685 km (0.072 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.96 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 207.4

Radius: 8.6

Gravity: 2.8 G

Time & Orbit

Eccentricity (e): 0.248

Orbit Range: 0.72 AU - 1.2 AU

Year: 607 Days

Day: 12.1 Hours

Environment

Temp: -160 °C

Axial Tilt: 26.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (34)

Outer Limit: 76,016,987 km

• M1: 113,395 km (0.101 R)
• M2: 187,596 km (0.102 R)
• M3: 251,624 km (0.105 R)
• M4: 340,335 km (0.071 R)
• M5: 427,252 km (0.108 R)
• M6: 497,263 km (0.1 R)
• M7: 575,204 km (0.086 R)
• M8: 770,728 km (0.112 R)
• M9: 835,654 km (0.075 R)
• M10: 926,609 km (0.108 R)
• M11: 1,237,773 km (0.11 R)
• M12: 1,314,965 km (0.072 R)
• M13: 1,412,503 km (0.071 R)
• M14: 1,532,032 km (0.072 R)
• M15: 1,610,271 km (0.07 R)
• M16: 1,853,218 km (0.092 R)
• M17: 2,043,208 km (0.025 R)
• M18: 2,201,033 km (0.091 R)
• M19: 2,453,854 km (0.071 R)
• M20: 2,674,660 km (0.079 R)
• M21: 3,030,404 km (0.093 R)
• M22: 3,104,605 km (0.09 R)
• M23: 3,248,667 km (0.12 R)
• M24: 3,324,663 km (0.116 R)
• M25: 3,420,406 km (0.115 R)
• M26: 3,549,808 km (0.051 R)
• M27: 3,859,924 km (0.047 R)
• M28: 4,014,908 km (0.06 R)
• M29: 4,338,039 km (0.036 R)
• M30: 4,428,995 km (0.085 R)
• M31: 4,584,277 km (0.114 R)
• M32: 4,641,124 km (0.057 R)
• M33: 4,762,897 km (0.105 R)
• M34: 4,943,910 km (0.111 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.33 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 588.3

Radius: 8.7

Gravity: 7.77 G

Time & Orbit

Eccentricity (e): 0.241

Orbit Range: 1.77 AU - 2.89 AU

Year: 2296 Days

Day: 6 Hours

Environment

Temp: -194 °C

Axial Tilt: 25.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 76,016,987 km

• M1: 120,277 km (0.072 R)
• M2: 214,673 km (0.095 R)
• M3: 281,244 km (0.096 R)
• M4: 396,135 km (0.063 R)
• M5: 499,507 km (0.075 R)
• M6: 653,144 km (0.112 R)
• M7: 710,739 km (0.089 R)
• M8: 813,962 km (0.058 R)
• M9: 1,074,861 km (0.091 R)
• M10: 1,134,251 km (0.079 R)
• M11: 1,256,473 km (0.103 R)
• M12: 1,329,775 km (0.055 R)
• M13: 1,581,399 km (0.05 R)
• M14: 1,742,067 km (0.069 R)
• M15: 1,884,036 km (0.099 R)
• M16: 2,141,942 km (0.107 R)
• M17: 2,255,936 km (0.114 R)
• M18: 2,424,233 km (0.117 R)
• M19: 2,704,879 km (0.113 R)
• M20: 3,010,208 km (0.057 R)
• M21: 3,095,479 km (0.109 R)
• M22: 3,195,859 km (0.096 R)
• M23: 3,533,651 km (0.065 R)
• M24: 3,683,997 km (0.084 R)
• M25: 3,898,221 km (0.054 R)
• M26: 3,991,271 km (0.111 R)
• M27: 4,148,050 km (0.046 R)
• M28: 4,532,666 km (0.041 R)
• M29: 4,762,448 km (0.098 R)
• M30: 4,828,720 km (0.077 R)
• M31: 4,979,066 km (0.112 R)
• M32: 5,080,194 km (0.064 R)
• M33: 5,789,438 km (0.108 R)
• M34: 5,913,753 km (0.108 R)
• M35: 6,182,880 km (0.115 R)
• M36: 6,511,247 km (0.116 R)
• M37: 6,603,400 km (0.077 R)
• M38: 6,976,646 km (0.093 R)
• M39: 7,052,044 km (0.056 R)
• M40: 7,607,501 km (0.114 R)
• M41: 8,018,446 km (0.081 R)
• M42: 8,216,663 km (0.074 R)
• M43: 8,316,445 km (0.111 R)
• M44: 8,597,838 km (0.061 R)
• M45: 9,046,333 km (0.112 R)
• M46: 9,149,406 km (0.097 R)
• M47: 9,586,232 km (0.072 R)
• M48: 9,670,306 km (0.119 R)
• M49: 9,839,052 km (0.09 R)
• M50: 9,902,631 km (0.11 R)
• M51: 10,157,995 km (0.11 R)
• M52: 10,243,714 km (0.045 R)
• M53: 10,588,687 km (0.099 R)
• M54: 11,201,739 km (0.114 R)
• M55: 11,290,151 km (0.114 R)
• M56: 11,758,692 km (0.049 R)
• M57: 12,074,643 km (0.071 R)
• M58: 12,188,187 km (0.12 R)
• M59: 12,784,036 km (0.105 R)
• M60: 13,506,893 km (0.047 R)
• M61: 13,837,803 km (0.116 R)
• M62: 13,980,370 km (0.114 R)
• M63: 14,051,878 km (0.109 R)
• M64: 14,315,020 km (0.063 R)
• M65: 14,435,147 km (0.101 R)
• M66: 14,507,403 km (0.108 R)
• M67: 14,797,623 km (0.079 R)
• M68: 15,089,788 km (0.094 R)
• M69: 15,212,159 km (0.11 R)
• M70: 15,408,431 km (0.117 R)
• M71: 15,655,118 km (0.092 R)
• M72: 15,729,319 km (0.074 R)
• M73: 15,977,651 km (0.114 R)
• M74: 16,102,416 km (0.037 R)
• M75: 16,781,141 km (0.036 R)
• M76: 16,933,282 km (0.112 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.2 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 157.3

Radius: 13.9

Gravity: 0.81 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 2.7 AU - 3.7 AU

Year: 3696 Days

Day: 5.9 Hours

Environment

Temp: -196 °C

Axial Tilt: 73.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (59)

Outer Limit: 76,016,987 km

• M1: 185,651 km (0.108 R)
• M2: 315,502 km (0.075 R)
• M3: 479,760 km (0.092 R)
• M4: 659,727 km (0.111 R)
• M5: 857,196 km (0.106 R)
• M6: 1,102,536 km (0.054 R)
• M7: 1,238,970 km (0.092 R)
• M8: 1,420,282 km (0.117 R)
• M9: 1,799,812 km (0.069 R)
• M10: 1,963,023 km (0.081 R)
• M11: 2,074,623 km (0.067 R)
• M12: 2,339,711 km (0.085 R)
• M13: 2,518,779 km (0.053 R)
• M14: 2,677,802 km (0.045 R)
• M15: 2,789,851 km (0.066 R)
• M16: 3,347,252 km (0.06 R)
• M17: 3,536,344 km (0.117 R)
• M18: 3,925,149 km (0.07 R)
• M19: 4,038,843 km (0.059 R)
• M20: 4,284,184 km (0.035 R)
• M21: 4,445,600 km (0.066 R)
• M22: 4,564,381 km (0.099 R)
• M23: 4,759,456 km (0.065 R)
• M24: 4,865,820 km (0.053 R)
• M25: 5,096,201 km (0.086 R)
• M26: 5,314,464 km (0.1 R)
• M27: 5,631,761 km (0.097 R)
• M28: 6,235,389 km (0.101 R)
• M29: 6,519,625 km (0.095 R)
• M30: 6,654,861 km (0.114 R)
• M31: 6,808,199 km (0.085 R)
• M32: 7,170,525 km (0.069 R)
• M33: 7,627,995 km (0.099 R)
• M34: 7,734,958 km (0.045 R)
• M35: 7,842,369 km (0.107 R)
• M36: 7,986,432 km (0.1 R)
• M37: 8,258,850 km (0.092 R)
• M38: 8,350,254 km (0.104 R)
• M39: 8,460,508 km (0.059 R)
• M40: 8,608,310 km (0.098 R)
• M41: 8,701,061 km (0.107 R)
• M42: 8,869,059 km (0.113 R)
• M43: 9,019,106 km (0.078 R)
• M44: 9,246,046 km (0.114 R)
• M45: 9,436,484 km (0.098 R)
• M46: 9,782,654 km (0.058 R)
• M47: 9,937,787 km (0.118 R)
• M48: 10,133,012 km (0.052 R)
• M49: 10,290,090 km (0.107 R)
• M50: 11,249,461 km (0.106 R)
• M51: 11,863,560 km (0.067 R)
• M52: 12,383,712 km (0.112 R)
• M53: 12,890,101 km (0.115 R)
• M54: 13,252,875 km (0.088 R)
• M55: 13,381,829 km (0.117 R)
• M56: 14,054,271 km (0.1 R)
• M57: 14,671,213 km (0.079 R)
• M58: 14,760,074 km (0.12 R)
• M59: 14,915,955 km (0.071 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.51 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 874.5

Radius: 11.2

Gravity: 6.97 G

Time & Orbit

Eccentricity (e): 0.036

Orbit Range: 3.38 AU - 3.64 AU

Year: 4246 Days

Day: 5.8 Hours

Environment

Temp: -204 °C

Axial Tilt: 40 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 76,016,987 km

• M1: 192,981 km (0.116 R)
• M2: 306,676 km (0.091 R)
• M3: 409,150 km (0.091 R)
• M4: 568,921 km (0.077 R)
• M5: 727,794 km (0.032 R)
• M6: 851,062 km (0.117 R)
• M7: 981,811 km (0.114 R)
• M8: 1,133,952 km (0.054 R)
• M9: 1,249,741 km (0.082 R)
• M10: 1,573,321 km (0.103 R)
• M11: 1,975,440 km (0.064 R)
• M12: 2,134,462 km (0.066 R)
• M13: 2,676,156 km (0.045 R)
• M14: 2,972,809 km (0.083 R)
• M15: 3,533,801 km (0.119 R)
• M16: 3,662,904 km (0.094 R)
• M17: 3,970,477 km (0.114 R)
• M18: 4,309,466 km (0.078 R)
• M19: 4,424,507 km (0.111 R)
• M20: 4,587,419 km (0.08 R)
• M21: 4,752,276 km (0.116 R)
• M22: 5,039,503 km (0.041 R)
• M23: 5,307,882 km (0.057 R)
• M24: 5,506,099 km (0.047 R)
• M25: 5,581,048 km (0.102 R)
• M26: 5,656,295 km (0.102 R)
• M27: 5,960,877 km (0.117 R)
• M28: 6,296,874 km (0.103 R)
• M29: 6,506,909 km (0.08 R)
• M30: 6,639,154 km (0.059 R)
• M31: 7,314,588 km (0.11 R)
• M32: 7,870,643 km (0.11 R)
• M33: 8,210,829 km (0.093 R)
• M34: 8,353,994 km (0.086 R)
• M35: 8,526,929 km (0.117 R)
• M36: 8,613,845 km (0.106 R)
• M37: 8,759,404 km (0.1 R)
• M38: 9,379,637 km (0.059 R)
• M39: 9,529,384 km (0.094 R)
• M40: 9,800,904 km (0.116 R)
• M41: 9,892,010 km (0.053 R)
• M42: 10,631,023 km (0.094 R)
• M43: 10,944,131 km (0.081 R)
• M44: 11,133,522 km (0.048 R)
• M45: 11,355,825 km (0.089 R)
• M46: 11,515,595 km (0.075 R)
• M47: 12,853,150 km (0.049 R)
• M48: 12,986,292 km (0.066 R)
• M49: 13,253,923 km (0.103 R)
• M50: 13,965,111 km (0.052 R)
• M51: 14,067,735 km (0.111 R)
• M52: 14,170,658 km (0.045 R)
• M53: 14,446,218 km (0.031 R)
• M54: 14,550,039 km (0.062 R)
• M55: 14,654,009 km (0.061 R)
• M56: 16,172,577 km (0.114 R)
• M57: 17,371,604 km (0.062 R)
• M58: 17,851,813 km (0.077 R)
• M59: 18,712,001 km (0.101 R)
• M60: 20,124,205 km (0.076 R)
• M61: 21,058,443 km (0.118 R)
• M62: 22,166,216 km (0.053 R)
• M63: 22,286,044 km (0.043 R)
• M64: 22,848,083 km (0.116 R)
• M65: 23,252,446 km (0.086 R)
• M66: 23,659,053 km (0.12 R)
• M67: 23,904,244 km (0.107 R)
• M68: 24,479,448 km (0.075 R)
• M69: 24,603,315 km (0.106 R)
• M70: 24,686,042 km (0.093 R)
• M71: 24,893,235 km (0.096 R)
• M72: 25,392,743 km (0.118 R)
• M73: 26,571,125 km (0.052 R)
• M74: 27,081,553 km (0.119 R)
• M75: 27,509,403 km (0.049 R)
• M76: 27,810,244 km (0.118 R)
• M77: 28,719,350 km (0.119 R)
• M78: 29,155,727 km (0.1 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.62 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 772.4

Radius: 14.9

Gravity: 3.48 G

Time & Orbit

Eccentricity (e): 0.001

Orbit Range: 3.62 AU - 3.62 AU

Year: 4447 Days

Day: 9.6 Hours

Environment

Temp: -216 °C

Axial Tilt: 28 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 76,016,987 km

• M1: 186,249 km (0.095 R)
• M2: 286,031 km (0.081 R)
• M3: 390,899 km (0.092 R)
• M4: 631,153 km (0.115 R)
• M5: 743,352 km (0.11 R)
• M6: 1,181,973 km (0.079 R)
• M7: 1,297,014 km (0.099 R)
• M8: 1,400,984 km (0.057 R)
• M9: 1,570,478 km (0.071 R)
• M10: 2,446,374 km (0.097 R)
• M11: 2,539,573 km (0.107 R)
• M12: 2,691,415 km (0.094 R)
• M13: 2,984,627 km (0.089 R)
• M14: 3,084,708 km (0.12 R)
• M15: 3,308,955 km (0.057 R)
• M16: 3,517,644 km (0.109 R)
• M17: 3,773,905 km (0.034 R)
• M18: 3,992,169 km (0.119 R)
• M19: 4,125,311 km (0.083 R)
• M20: 4,464,449 km (0.095 R)
• M21: 5,487,100 km (0.034 R)
• M22: 5,610,818 km (0.114 R)
• M23: 6,371,822 km (0.115 R)
• M24: 6,501,972 km (0.103 R)
• M25: 6,870,881 km (0.099 R)
• M26: 7,057,878 km (0.105 R)
• M27: 7,437,109 km (0.118 R)
• M28: 7,767,570 km (0.101 R)
• M29: 8,300,737 km (0.075 R)
• M30: 8,932,938 km (0.114 R)
• M31: 9,166,759 km (0.075 R)
• M32: 9,343,434 km (0.094 R)
• M33: 9,550,926 km (0.08 R)
• M34: 10,091,723 km (0.12 R)
• M35: 10,952,958 km (0.056 R)
• M36: 11,046,606 km (0.099 R)
• M37: 11,424,041 km (0.101 R)
• M38: 11,677,909 km (0.058 R)
• M39: 12,030,212 km (0.102 R)
• M40: 12,483,793 km (0.114 R)
• M41: 12,745,439 km (0.056 R)
• M42: 13,709,149 km (0.117 R)
• M43: 13,945,364 km (0.076 R)
• M44: 14,387,575 km (0.118 R)
• M45: 15,989,170 km (0.12 R)
• M46: 16,380,518 km (0.082 R)
• M47: 16,595,341 km (0.104 R)
• M48: 17,100,383 km (0.104 R)
• M49: 17,354,699 km (0.108 R)
• M50: 17,464,055 km (0.054 R)
• M51: 17,977,625 km (0.082 R)
• M52: 18,088,327 km (0.055 R)
• M53: 19,472,257 km (0.049 R)
• M54: 19,699,945 km (0.036 R)
• M55: 20,157,864 km (0.106 R)
• M56: 20,890,295 km (0.028 R)
• M57: 21,279,250 km (0.085 R)
• M58: 21,827,676 km (0.09 R)
• M59: 21,985,352 km (0.111 R)
• M60: 22,500,118 km (0.112 R)
• M61: 23,460,985 km (0.063 R)
• M62: 24,762,936 km (0.076 R)
• M63: 24,886,204 km (0.079 R)
• M64: 25,963,010 km (0.093 R)
• M65: 26,255,623 km (0.033 R)
• M66: 26,549,134 km (0.076 R)
• M67: 26,970,551 km (0.111 R)
• M68: 28,119,313 km (0.065 R)
• M69: 28,333,837 km (0.112 R)
• M70: 28,591,893 km (0.03 R)
• M71: 28,850,847 km (0.039 R)

Planet 7 - Ice Giant

Semi-Major Axis: 10.16 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 624.9

Radius: 7.3

Gravity: 11.73 G

Time & Orbit

Eccentricity (e): 0.105

Orbit Range: 9.09 AU - 11.23 AU

Year: 20910 Days

Day: 24.3 Hours

Environment

Temp: -229 °C

Axial Tilt: 11.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 76,016,987 km

• M1: 135,236 km (0.115 R)
• M2: 190,588 km (0.076 R)
• M3: 465,698 km (0.061 R)
• M4: 675,584 km (0.105 R)
• M5: 767,736 km (0.034 R)
• M6: 965,205 km (0.066 R)
• M7: 1,124,078 km (0.109 R)
• M8: 1,178,831 km (0.096 R)
• M9: 1,437,187 km (0.104 R)
• M10: 1,497,026 km (0.097 R)
• M11: 2,175,003 km (0.116 R)
• M12: 2,491,852 km (0.067 R)
• M13: 4,025,529 km (0.101 R)
• M14: 4,634,692 km (0.076 R)
• M15: 4,814,059 km (0.094 R)
• M16: 5,696,837 km (0.098 R)
• M17: 5,744,708 km (0.051 R)
• M18: 6,478,485 km (0.112 R)
• M19: 6,830,938 km (0.052 R)
• M20: 7,818,882 km (0.102 R)
• M21: 8,140,219 km (0.067 R)
• M22: 8,795,607 km (0.103 R)
• M23: 9,638,591 km (0.097 R)
• M24: 10,214,842 km (0.118 R)
• M25: 14,549,590 km (0.046 R)
• M26: 16,150,437 km (0.104 R)
• M27: 16,559,288 km (0.093 R)
• M28: 16,696,319 km (0.118 R)
• M29: 18,654,106 km (0.031 R)
• M30: 18,796,823 km (0.117 R)
• M31: 19,950,671 km (0.057 R)
• M32: 20,831,055 km (0.059 R)
• M33: 22,402,132 km (0.102 R)
• M34: 23,163,585 km (0.041 R)
• M35: 23,470,560 km (0.094 R)
• M36: 24,010,907 km (0.076 R)
• M37: 25,419,221 km (0.054 R)
• M38: 26,934,797 km (0.09 R)
• M39: 28,397,266 km (0.117 R)
• M40: 28,973,068 km (0.075 R)
• M41: 29,885,466 km (0.042 R)
• M42: 30,723,214 km (0.106 R)
• M43: 30,976,034 km (0.097 R)
• M44: 31,314,125 km (0.093 R)
• M45: 32,335,879 km (0.075 R)
• M46: 33,109,450 km (0.107 R)
• M47: 33,541,787 km (0.108 R)
• M48: 33,976,070 km (0.095 R)
• M49: 34,937,984 km (0.102 R)
• M50: 36,888,441 km (0.102 R)
• M51: 38,238,413 km (0.113 R)
• M52: 39,696,094 km (0.062 R)
• M53: 40,893,924 km (0.061 R)
• M54: 41,543,777 km (0.108 R)
• M55: 42,290,720 km (0.063 R)
• M56: 44,653,169 km (0.066 R)
• M57: 44,844,056 km (0.096 R)
• M58: 48,717,444 km (0.044 R)
• M59: 50,296,599 km (0.068 R)
• M60: 50,992,828 km (0.038 R)
• M61: 51,092,460 km (0.079 R)
• M62: 51,492,036 km (0.078 R)
• M63: 52,193,650 km (0.086 R)
• M64: 53,201,341 km (0.059 R)
• M65: 54,724,995 km (0.087 R)
• M66: 56,469,157 km (0.114 R)
• M67: 56,985,569 km (0.1 R)
• M68: 57,192,612 km (0.098 R)
• M69: 57,296,134 km (0.11 R)
• M70: 60,855,666 km (0.045 R)
• M71: 62,128,893 km (0.07 R)
• M72: 65,567,101 km (0.086 R)
• M73: 66,001,085 km (0.104 R)
• M74: 67,856,697 km (0.097 R)
• M75: 67,966,352 km (0.108 R)
• M76: 71,954,033 km (0.099 R)
• M77: 72,513,977 km (0.117 R)
• M78: 76,016,961 km (0.107 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: 495 - 10,522 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit