🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.59 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.68

Radius: 1.68

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.086

Orbit Range: 0.54 AU - 0.64 AU

Year: 169 Days

Day: 41.2 Hours

Environment

Temp: 212 °C

Axial Tilt: 0.5 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.78 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.92

Radius: 1.89

Gravity: 1.38 G

Time & Orbit

Eccentricity (e): 0.05

Orbit Range: 0.74 AU - 0.82 AU

Year: 257 Days

Day: 27.7 Hours

Environment

Temp: 104 °C

Axial Tilt: 35.6 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 60,635,265 km

• M1: 44,580 km (0.086 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.49 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.53

Radius: 0.78

Gravity: 0.87 G

Time & Orbit

Eccentricity (e): 0.055

Orbit Range: 1.41 AU - 1.57 AU

Year: 678 Days

Day: 18.7 Hours

Environment

Temp: -39 °C

Axial Tilt: 27 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 1.67 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.92

Radius: 1.89

Gravity: 1.38 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 1.61 AU - 1.73 AU

Year: 805 Days

Day: 36.1 Hours

Environment

Temp: -50 °C

Axial Tilt: 5.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 4.92 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 284.6

Radius: 11.5

Gravity: 2.15 G

Time & Orbit

Eccentricity (e): 0.05

Orbit Range: 4.67 AU - 5.17 AU

Year: 4068 Days

Day: 12.8 Hours

Environment

Temp: -134 °C

Axial Tilt: 23.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 60,635,265 km

• M1: 194,028 km (0.064 R)
• M2: 276,158 km (0.104 R)
• M3: 367,562 km (0.096 R)
• M4: 473,627 km (0.098 R)
• M5: 778,059 km (0.12 R)
• M6: 923,168 km (0.081 R)
• M7: 1,035,816 km (0.061 R)
• M8: 1,298,210 km (0.114 R)
• M9: 1,509,443 km (0.095 R)
• M10: 1,719,478 km (0.119 R)
• M11: 1,795,922 km (0.058 R)
• M12: 2,168,421 km (0.117 R)
• M13: 2,307,398 km (0.095 R)
• M14: 2,579,815 km (0.09 R)
• M15: 2,802,417 km (0.116 R)
• M16: 2,877,964 km (0.088 R)
• M17: 2,985,076 km (0.113 R)
• M18: 3,156,066 km (0.069 R)
• M19: 3,330,198 km (0.072 R)
• M20: 3,524,077 km (0.103 R)
• M21: 3,771,512 km (0.079 R)
• M22: 3,906,000 km (0.077 R)
• M23: 4,076,243 km (0.096 R)
• M24: 4,196,819 km (0.093 R)
• M25: 4,283,885 km (0.044 R)
• M26: 4,619,732 km (0.113 R)
• M27: 4,781,746 km (0.117 R)
• M28: 4,927,455 km (0.104 R)
• M29: 5,430,253 km (0.103 R)
• M30: 5,736,031 km (0.059 R)
• M31: 6,027,747 km (0.084 R)
• M32: 6,444,527 km (0.12 R)
• M33: 6,727,566 km (0.109 R)
• M34: 6,911,571 km (0.115 R)
• M35: 7,601,068 km (0.114 R)
• M36: 7,792,852 km (0.09 R)
• M37: 7,900,264 km (0.073 R)
• M38: 8,203,199 km (0.086 R)
• M39: 8,290,564 km (0.086 R)
• M40: 8,620,727 km (0.091 R)
• M41: 9,000,107 km (0.118 R)
• M42: 9,203,111 km (0.093 R)
• M43: 9,683,021 km (0.066 R)
• M44: 9,960,825 km (0.084 R)
• M45: 10,171,010 km (0.103 R)
• M46: 11,195,157 km (0.067 R)
• M47: 11,389,335 km (0.095 R)
• M48: 11,609,094 km (0.107 R)
• M49: 11,731,764 km (0.062 R)
• M50: 11,830,349 km (0.095 R)
• M51: 12,003,284 km (0.086 R)
• M52: 12,077,784 km (0.115 R)
• M53: 12,577,740 km (0.057 R)
• M54: 13,520,656 km (0.112 R)
• M55: 14,223,018 km (0.103 R)
• M56: 14,671,362 km (0.078 R)
• M57: 14,777,577 km (0.085 R)
• M58: 15,419,950 km (0.1 R)
• M59: 15,636,119 km (0.105 R)
• M60: 16,071,598 km (0.056 R)
• M61: 16,235,857 km (0.086 R)
• M62: 16,345,662 km (0.03 R)
• M63: 16,898,725 km (0.08 R)
• M64: 17,177,426 km (0.086 R)
• M65: 17,429,648 km (0.084 R)
• M66: 17,739,615 km (0.098 R)
• M67: 17,881,134 km (0.105 R)
• M68: 18,022,953 km (0.102 R)
• M69: 18,422,230 km (0.12 R)
• M70: 18,622,841 km (0.07 R)
• M71: 18,766,754 km (0.113 R)
• M72: 18,853,221 km (0.105 R)
• M73: 19,258,482 km (0.098 R)
• M74: 19,374,719 km (0.058 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 491.5

Radius: 13.9

Gravity: 2.54 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 4.61 AU - 7.41 AU

Year: 5492 Days

Day: 6.5 Hours

Environment

Temp: -153 °C

Axial Tilt: 22.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 60,635,265 km

• M1: 173,833 km (0.075 R)
• M2: 285,882 km (0.093 R)
• M3: 582,833 km (0.07 R)
• M4: 737,069 km (0.11 R)
• M5: 869,313 km (0.062 R)
• M6: 1,146,219 km (0.119 R)
• M7: 1,655,300 km (0.07 R)
• M8: 1,868,178 km (0.074 R)
• M9: 2,038,121 km (0.099 R)
• M10: 2,486,167 km (0.073 R)
• M11: 2,750,806 km (0.089 R)
• M12: 2,965,179 km (0.113 R)
• M13: 3,205,733 km (0.095 R)
• M14: 3,834,941 km (0.083 R)
• M15: 4,119,626 km (0.112 R)
• M16: 4,548,224 km (0.101 R)
• M17: 4,803,139 km (0.084 R)
• M18: 5,546,640 km (0.052 R)
• M19: 5,794,374 km (0.113 R)
• M20: 6,121,694 km (0.108 R)
• M21: 6,481,178 km (0.119 R)
• M22: 6,900,501 km (0.072 R)
• M23: 7,059,972 km (0.083 R)
• M24: 7,274,645 km (0.112 R)
• M25: 7,382,805 km (0.047 R)
• M26: 7,518,789 km (0.093 R)
• M27: 8,015,155 km (0.096 R)
• M28: 8,126,904 km (0.102 R)
• M29: 8,522,142 km (0.098 R)
• M30: 8,750,877 km (0.115 R)
• M31: 8,923,812 km (0.108 R)
• M32: 9,243,802 km (0.074 R)
• M33: 9,331,766 km (0.119 R)
• M34: 10,105,486 km (0.118 R)
• M35: 10,439,089 km (0.082 R)
• M36: 10,745,465 km (0.039 R)
• M37: 10,930,817 km (0.072 R)
• M38: 11,587,701 km (0.083 R)
• M39: 11,746,126 km (0.107 R)
• M40: 13,038,502 km (0.068 R)
• M41: 13,335,453 km (0.074 R)
• M42: 13,969,898 km (0.102 R)
• M43: 14,751,098 km (0.054 R)
• M44: 14,888,429 km (0.065 R)
• M45: 15,129,730 km (0.114 R)
• M46: 15,581,366 km (0.088 R)
• M47: 16,002,185 km (0.031 R)
• M48: 16,178,711 km (0.08 R)
• M49: 16,320,230 km (0.095 R)
• M50: 16,426,744 km (0.06 R)
• M51: 16,711,877 km (0.084 R)
• M52: 17,942,170 km (0.072 R)
• M53: 18,346,384 km (0.095 R)
• M54: 19,238,885 km (0.044 R)
• M55: 19,993,307 km (0.119 R)
• M56: 20,450,777 km (0.116 R)
• M57: 21,065,923 km (0.108 R)
• M58: 21,375,890 km (0.116 R)
• M59: 22,000,312 km (0.086 R)
• M60: 22,157,240 km (0.108 R)
• M61: 22,709,854 km (0.065 R)
• M62: 24,760,991 km (0.063 R)
• M63: 24,965,192 km (0.076 R)
• M64: 25,293,260 km (0.062 R)
• M65: 25,457,818 km (0.07 R)
• M66: 26,244,254 km (0.069 R)
• M67: 27,798,576 km (0.108 R)
• M68: 28,651,283 km (0.09 R)
• M69: 28,779,788 km (0.108 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 914.7

Radius: 13

Gravity: 5.41 G

Time & Orbit

Eccentricity (e): 0.006

Orbit Range: 6.87 AU - 6.95 AU

Year: 6771 Days

Day: 5.4 Hours

Environment

Temp: -164 °C

Axial Tilt: 39.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 60,635,265 km

• M1: 202,256 km (0.109 R)
• M2: 561,590 km (0.05 R)
• M3: 698,921 km (0.098 R)
• M4: 944,860 km (0.119 R)
• M5: 1,113,607 km (0.094 R)
• M6: 1,219,971 km (0.081 R)
• M7: 1,482,365 km (0.101 R)
• M8: 1,889,122 km (0.096 R)
• M9: 2,128,030 km (0.094 R)
• M10: 2,469,861 km (0.066 R)
• M11: 3,129,438 km (0.101 R)
• M12: 3,387,494 km (0.077 R)
• M13: 3,519,140 km (0.116 R)
• M14: 3,869,499 km (0.096 R)
• M15: 4,575,152 km (0.033 R)
• M16: 5,692,049 km (0.099 R)
• M17: 6,168,070 km (0.117 R)
• M18: 6,427,323 km (0.082 R)
• M19: 6,624,194 km (0.109 R)
• M20: 6,723,377 km (0.096 R)
• M21: 6,856,370 km (0.115 R)
• M22: 7,125,047 km (0.064 R)
• M23: 7,465,831 km (0.054 R)
• M24: 7,603,611 km (0.08 R)
• M25: 7,951,875 km (0.044 R)
• M26: 8,555,951 km (0.084 R)
• M27: 8,954,779 km (0.048 R)
• M28: 9,545,840 km (0.099 R)
• M29: 9,658,039 km (0.081 R)
• M30: 9,846,083 km (0.073 R)
• M31: 10,610,379 km (0.087 R)
• M32: 10,999,782 km (0.119 R)
• M33: 11,592,638 km (0.087 R)
• M34: 11,832,743 km (0.107 R)
• M35: 12,115,034 km (0.081 R)
• M36: 12,440,260 km (0.114 R)
• M37: 12,686,049 km (0.057 R)
• M38: 13,224,302 km (0.102 R)
• M39: 15,188,073 km (0.092 R)
• M40: 16,159,263 km (0.073 R)
• M41: 16,338,032 km (0.12 R)
• M42: 16,517,400 km (0.073 R)
• M43: 16,833,052 km (0.102 R)
• M44: 17,561,743 km (0.057 R)
• M45: 17,791,525 km (0.085 R)
• M46: 18,254,231 km (0.069 R)
• M47: 18,347,281 km (0.081 R)
• M48: 18,674,153 km (0.104 R)
• M49: 18,814,775 km (0.1 R)
• M50: 19,428,425 km (0.115 R)
• M51: 19,809,301 km (0.103 R)
• M52: 20,385,253 km (0.113 R)
• M53: 20,530,064 km (0.096 R)
• M54: 21,112,897 km (0.076 R)
• M55: 21,701,266 km (0.116 R)
• M56: 22,195,686 km (0.077 R)
• M57: 22,593,916 km (0.066 R)
• M58: 23,397,406 km (0.074 R)
• M59: 23,802,667 km (0.039 R)
• M60: 24,159,159 km (0.117 R)
• M61: 24,414,971 km (0.092 R)
• M62: 24,722,993 km (0.045 R)
• M63: 26,598,501 km (0.117 R)
• M64: 27,021,415 km (0.097 R)
• M65: 27,981,384 km (0.111 R)
• M66: 28,411,478 km (0.037 R)
• M67: 29,278,547 km (0.069 R)
• M68: 29,605,867 km (0.095 R)
• M69: 30,374,352 km (0.12 R)
• M70: 31,539,569 km (0.08 R)
• M71: 31,763,069 km (0.079 R)
• M72: 32,775,846 km (0.087 R)
• M73: 34,372,205 km (0.118 R)
• M74: 34,890,711 km (0.063 R)
• M75: 35,121,840 km (0.108 R)
• M76: 36,755,000 km (0.043 R)
• M77: 37,167,142 km (0.118 R)
• M78: 37,877,283 km (0.095 R)
• M79: 38,950,947 km (0.115 R)
• M80: 39,792,734 km (0.11 R)
• M81: 40,034,485 km (0.088 R)
• M82: 40,519,182 km (0.101 R)

Planet 8 - Gas Giant

Semi-Major Axis: 8.07 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 666.5

Radius: 8.8

Gravity: 8.61 G

Time & Orbit

Eccentricity (e): 0.064

Orbit Range: 7.55 AU - 8.59 AU

Year: 8546 Days

Day: 9.6 Hours

Environment

Temp: -174 °C

Axial Tilt: 100.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 60,635,265 km

• M1: 113,246 km (0.115 R)
• M2: 239,207 km (0.071 R)
• M3: 331,060 km (0.108 R)
• M4: 413,040 km (0.111 R)
• M5: 1,021,005 km (0.063 R)
• M6: 1,185,414 km (0.066 R)
• M7: 1,358,648 km (0.057 R)
• M8: 1,730,099 km (0.098 R)
• M9: 1,882,988 km (0.103 R)
• M10: 1,995,037 km (0.084 R)
• M11: 2,202,230 km (0.119 R)
• M12: 2,320,413 km (0.085 R)
• M13: 2,465,074 km (0.11 R)
• M14: 2,563,210 km (0.106 R)
• M15: 2,763,521 km (0.066 R)
• M16: 2,865,547 km (0.108 R)
• M17: 3,073,638 km (0.099 R)
• M18: 3,504,330 km (0.081 R)
• M19: 3,755,056 km (0.059 R)
• M20: 3,982,894 km (0.093 R)
• M21: 4,098,533 km (0.076 R)
• M22: 4,481,952 km (0.072 R)
• M23: 5,635,651 km (0.075 R)
• M24: 6,195,147 km (0.077 R)
• M25: 6,532,640 km (0.076 R)
• M26: 6,669,223 km (0.078 R)
• M27: 6,772,296 km (0.042 R)
• M28: 6,910,674 km (0.073 R)
• M29: 7,260,583 km (0.059 R)
• M30: 7,473,311 km (0.111 R)
• M31: 7,580,573 km (0.118 R)
• M32: 7,941,403 km (0.085 R)
• M33: 8,234,166 km (0.096 R)
• M34: 8,418,919 km (0.113 R)
• M35: 8,679,968 km (0.086 R)
• M36: 8,943,709 km (0.099 R)
• M37: 9,095,551 km (0.082 R)
• M38: 9,556,312 km (0.116 R)
• M39: 9,750,640 km (0.096 R)
• M40: 10,301,459 km (0.118 R)
• M41: 10,540,666 km (0.049 R)
• M42: 11,433,316 km (0.06 R)
• M43: 11,515,595 km (0.053 R)
• M44: 12,013,906 km (0.074 R)
• M45: 12,392,239 km (0.118 R)
• M46: 13,333,509 km (0.102 R)
• M47: 14,386,528 km (0.092 R)
• M48: 14,519,969 km (0.087 R)
• M49: 14,743,319 km (0.066 R)
• M50: 15,013,044 km (0.111 R)
• M51: 15,103,251 km (0.103 R)
• M52: 15,284,265 km (0.102 R)
• M53: 17,988,695 km (0.114 R)
• M54: 18,469,802 km (0.116 R)
• M55: 19,248,160 km (0.085 R)
• M56: 19,888,588 km (0.089 R)
• M57: 20,386,001 km (0.09 R)
• M58: 20,636,129 km (0.095 R)
• M59: 21,596,248 km (0.098 R)
• M60: 22,622,639 km (0.1 R)
• M61: 23,089,683 km (0.05 R)
• M62: 24,775,951 km (0.095 R)
• M63: 25,310,913 km (0.074 R)
• M64: 25,526,034 km (0.092 R)
• M65: 25,633,745 km (0.112 R)
• M66: 27,213,498 km (0.105 R)
• M67: 27,654,812 km (0.094 R)
• M68: 28,098,519 km (0.1 R)
• M69: 28,154,020 km (0.087 R)
• M70: 28,936,716 km (0.073 R)
• M71: 29,105,313 km (0.078 R)
• M72: 29,500,102 km (0.059 R)
• M73: 30,237,918 km (0.102 R)
• M74: 30,523,351 km (0.094 R)
• M75: 32,137,961 km (0.075 R)
• M76: 33,014,455 km (0.079 R)
• M77: 33,544,031 km (0.04 R)
• M78: 33,602,973 km (0.072 R)
• M79: 35,029,837 km (0.062 R)
• M80: 35,570,035 km (0.073 R)
• M81: 35,811,037 km (0.108 R)
• M82: 36,901,905 km (0.051 R)
• M83: 37,819,389 km (0.112 R)
• M84: 38,003,843 km (0.098 R)
• M85: 38,250,231 km (0.093 R)
• M86: 41,310,554 km (0.096 R)
• M87: 41,437,114 km (0.066 R)
• M88: 42,135,587 km (0.056 R)
• M89: 42,774,070 km (0.118 R)

Planet 9 - Gas Giant

Semi-Major Axis: 11.64 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 632.7

Radius: 8.5

Gravity: 8.76 G

Time & Orbit

Eccentricity (e): 0.045

Orbit Range: 11.12 AU - 12.16 AU

Year: 14804 Days

Day: 6.1 Hours

Environment

Temp: -177 °C

Axial Tilt: 33.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 60,635,265 km

• M1: 107,561 km (0.101 R)
• M2: 359,484 km (0.104 R)
• M3: 571,913 km (0.084 R)
• M4: 664,364 km (0.117 R)
• M5: 742,305 km (0.051 R)
• M6: 929,452 km (0.062 R)
• M7: 1,202,767 km (0.064 R)
• M8: 1,475,334 km (0.099 R)
• M9: 1,739,973 km (0.096 R)
• M10: 1,794,726 km (0.115 R)
• M11: 1,878,052 km (0.115 R)
• M12: 1,991,148 km (0.095 R)
• M13: 2,653,417 km (0.102 R)
• M14: 3,175,065 km (0.102 R)
• M15: 3,378,967 km (0.093 R)
• M16: 3,871,144 km (0.1 R)
• M17: 3,943,400 km (0.081 R)
• M18: 5,317,905 km (0.064 R)
• M19: 5,847,631 km (0.066 R)
• M20: 6,056,021 km (0.111 R)
• M21: 6,957,348 km (0.074 R)
• M22: 7,089,443 km (0.099 R)
• M23: 7,671,828 km (0.097 R)
• M24: 7,945,891 km (0.113 R)
• M25: 8,084,119 km (0.05 R)
• M26: 8,316,295 km (0.063 R)
• M27: 8,503,592 km (0.111 R)
• M28: 8,597,838 km (0.066 R)
• M29: 8,882,374 km (0.079 R)
• M30: 9,073,859 km (0.117 R)
• M31: 9,315,160 km (0.105 R)
• M32: 10,502,668 km (0.06 R)
• M33: 10,755,937 km (0.081 R)
• M34: 11,217,148 km (0.052 R)
• M35: 11,684,790 km (0.055 R)
• M36: 12,692,931 km (0.069 R)
• M37: 12,908,651 km (0.114 R)
• M38: 13,016,960 km (0.06 R)
• M39: 14,228,702 km (0.106 R)
• M40: 15,996,351 km (0.028 R)
• M41: 16,287,917 km (0.078 R)
• M42: 17,411,995 km (0.119 R)
• M43: 17,651,801 km (0.102 R)
• M44: 17,832,365 km (0.056 R)
• M45: 18,195,290 km (0.095 R)
• M46: 19,983,882 km (0.087 R)
• M47: 20,803,828 km (0.106 R)
• M48: 21,185,901 km (0.102 R)
• M49: 22,216,181 km (0.094 R)
• M50: 22,411,257 km (0.108 R)
• M51: 23,262,768 km (0.092 R)
• M52: 23,725,624 km (0.113 R)
• M53: 23,991,609 km (0.104 R)
• M54: 24,124,901 km (0.095 R)
• M55: 24,660,611 km (0.092 R)
• M56: 24,795,099 km (0.11 R)
• M57: 24,929,887 km (0.09 R)
• M58: 25,471,581 km (0.105 R)
• M59: 26,222,562 km (0.091 R)
• M60: 27,327,941 km (0.039 R)
• M61: 28,660,259 km (0.087 R)
• M62: 28,731,019 km (0.086 R)
• M63: 29,014,507 km (0.101 R)
• M64: 30,662,028 km (0.064 R)
• M65: 32,339,768 km (0.077 R)
• M66: 33,226,884 km (0.1 R)
• M67: 33,449,934 km (0.075 R)
• M68: 33,972,330 km (0.117 R)
• M69: 35,555,524 km (0.116 R)
• M70: 36,854,782 km (0.066 R)
• M71: 37,548,916 km (0.114 R)
• M72: 39,342,146 km (0.07 R)
• M73: 40,606,098 km (0.084 R)
• M74: 42,043,883 km (0.07 R)
• M75: 44,640,902 km (0.102 R)
• M76: 45,133,678 km (0.119 R)
• M77: 47,540,408 km (0.069 R)
• M78: 49,055,087 km (0.066 R)
• M79: 49,309,104 km (0.118 R)
• M80: 50,073,698 km (0.1 R)
• M81: 50,244,090 km (0.047 R)
• M82: 51,700,575 km (0.085 R)
• M83: 54,567,469 km (0.095 R)
• M84: 55,270,130 km (0.064 R)
• M85: 55,622,583 km (0.071 R)
• M86: 59,910,357 km (0.094 R)

Kuiper Belt

Range: 30 - 56 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 157 - 16,273 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit