🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.6 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 1.2 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 561.4

Radius: 9.6

Gravity: 6.09 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 1.06 AU - 1.34 AU

Year: 849 Days

Day: 5.1 Hours

Environment

Temp: -158 °C

Axial Tilt: 24.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (60)

Outer Limit: 49,934,142 km

• M1: 145,409 km (0.071 R)
• M2: 212,130 km (0.08 R)
• M3: 274,213 km (0.106 R)
• M4: 338,690 km (0.03 R)
• M5: 448,195 km (0.09 R)
• M6: 591,211 km (0.047 R)
• M7: 655,987 km (0.097 R)
• M8: 734,226 km (0.101 R)
• M9: 872,156 km (0.089 R)
• M10: 971,189 km (0.082 R)
• M11: 1,086,529 km (0.105 R)
• M12: 1,187,358 km (0.092 R)
• M13: 1,258,567 km (0.11 R)
• M14: 1,324,689 km (0.051 R)
• M15: 1,392,008 km (0.118 R)
• M16: 1,572,722 km (0.081 R)
• M17: 1,666,071 km (0.069 R)
• M18: 1,731,745 km (0.088 R)
• M19: 1,865,785 km (0.109 R)
• M20: 2,034,531 km (0.088 R)
• M21: 2,305,154 km (0.082 R)
• M22: 2,453,255 km (0.106 R)
• M23: 2,536,881 km (0.1 R)
• M24: 2,630,080 km (0.079 R)
• M25: 2,689,919 km (0.08 R)
• M26: 2,750,357 km (0.046 R)
• M27: 2,819,770 km (0.059 R)
• M28: 3,104,006 km (0.091 R)
• M29: 3,267,816 km (0.118 R)
• M30: 3,406,643 km (0.035 R)
• M31: 3,566,413 km (0.042 R)
• M32: 3,738,301 km (0.12 R)
• M33: 4,080,282 km (0.063 R)
• M34: 4,160,018 km (0.115 R)
• M35: 4,220,006 km (0.1 R)
• M36: 4,330,858 km (0.078 R)
• M37: 4,679,721 km (0.12 R)
• M38: 4,752,724 km (0.084 R)
• M39: 5,059,101 km (0.029 R)
• M40: 5,144,671 km (0.114 R)
• M41: 5,220,068 km (0.119 R)
• M42: 5,328,377 km (0.061 R)
• M43: 5,404,672 km (0.087 R)
• M44: 5,591,370 km (0.073 R)
• M45: 5,691,002 km (0.058 R)
• M46: 5,769,092 km (0.116 R)
• M47: 5,892,361 km (0.099 R)
• M48: 5,982,568 km (0.058 R)
• M49: 6,130,072 km (0.096 R)
• M50: 6,673,711 km (0.07 R)
• M51: 6,850,386 km (0.094 R)
• M52: 7,305,163 km (0.1 R)
• M53: 7,462,989 km (0.09 R)
• M54: 7,560,676 km (0.098 R)
• M55: 7,658,813 km (0.106 R)
• M56: 7,782,081 km (0.096 R)
• M57: 7,844,015 km (0.029 R)
• M58: 7,906,098 km (0.071 R)
• M59: 8,055,546 km (0.082 R)
• M60: 8,370,300 km (0.105 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 870.1

Radius: 9.3

Gravity: 10.06 G

Time & Orbit

Eccentricity (e): 0.067

Orbit Range: 1.72 AU - 1.96 AU

Year: 1612 Days

Day: 11 Hours

Environment

Temp: -180 °C

Axial Tilt: 27.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (69)

Outer Limit: 49,934,142 km

• M1: 168,896 km (0.077 R)
• M2: 291,417 km (0.057 R)
• M3: 416,630 km (0.117 R)
• M4: 576,550 km (0.099 R)
• M5: 672,293 km (0.078 R)
• M6: 734,077 km (0.093 R)
• M7: 958,025 km (0.075 R)
• M8: 1,359,396 km (0.047 R)
• M9: 1,439,580 km (0.095 R)
• M10: 1,583,942 km (0.07 R)
• M11: 1,647,222 km (0.082 R)
• M12: 1,809,536 km (0.12 R)
• M13: 1,943,276 km (0.092 R)
• M14: 2,220,631 km (0.111 R)
• M15: 2,673,015 km (0.069 R)
• M16: 2,749,010 km (0.074 R)
• M17: 2,903,395 km (0.065 R)
• M18: 3,113,730 km (0.108 R)
• M19: 3,329,151 km (0.092 R)
• M20: 3,774,653 km (0.098 R)
• M21: 4,150,443 km (0.092 R)
• M22: 4,387,706 km (0.073 R)
• M23: 4,477,913 km (0.081 R)
• M24: 4,736,717 km (0.107 R)
• M25: 5,016,017 km (0.119 R)
• M26: 5,574,765 km (0.084 R)
• M27: 5,639,840 km (0.027 R)
• M28: 5,787,343 km (0.119 R)
• M29: 6,170,015 km (0.086 R)
• M30: 6,288,047 km (0.063 R)
• M31: 6,424,032 km (0.082 R)
• M32: 6,750,754 km (0.101 R)
• M33: 7,100,513 km (0.091 R)
• M34: 7,474,059 km (0.107 R)
• M35: 7,781,333 km (0.108 R)
• M36: 7,982,393 km (0.112 R)
• M37: 8,240,599 km (0.068 R)
• M38: 8,520,496 km (0.118 R)
• M39: 8,727,689 km (0.118 R)
• M40: 8,936,528 km (0.12 R)
• M41: 9,012,973 km (0.05 R)
• M42: 9,147,162 km (0.07 R)
• M43: 9,398,037 km (0.114 R)
• M44: 9,573,217 km (0.095 R)
• M45: 9,926,567 km (0.088 R)
• M46: 10,084,991 km (0.087 R)
• M47: 10,284,255 km (0.096 R)
• M48: 10,364,290 km (0.108 R)
• M49: 10,605,741 km (0.071 R)
• M50: 11,258,736 km (0.111 R)
• M51: 11,527,713 km (0.061 R)
• M52: 11,777,990 km (0.062 R)
• M53: 11,840,821 km (0.096 R)
• M54: 12,177,715 km (0.117 R)
• M55: 12,283,780 km (0.06 R)
• M56: 12,389,995 km (0.097 R)
• M57: 12,560,686 km (0.1 R)
• M58: 12,689,191 km (0.106 R)
• M59: 13,012,472 km (0.082 R)
• M60: 13,142,472 km (0.107 R)
• M61: 13,207,697 km (0.093 R)
• M62: 13,403,820 km (0.031 R)
• M63: 13,579,148 km (0.03 R)
• M64: 13,688,953 km (0.081 R)
• M65: 13,777,216 km (0.119 R)
• M66: 13,931,900 km (0.114 R)
• M67: 14,489,003 km (0.073 R)
• M68: 14,872,123 km (0.106 R)
• M69: 15,076,324 km (0.113 R)

Planet 3 - Gas Giant

Semi-Major Axis: 5.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 35.3

Radius: 11.5

Gravity: 0.27 G

Time & Orbit

Eccentricity (e): 0.096

Orbit Range: 4.53 AU - 5.49 AU

Year: 7241 Days

Day: 8.7 Hours

Environment

Temp: -209 °C

Axial Tilt: 16.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (26)

Outer Limit: 49,934,142 km

• M1: 149,598 km (0.11 R)
• M2: 261,198 km (0.047 R)
• M3: 384,467 km (0.059 R)
• M4: 912,996 km (0.103 R)
• M5: 1,194,389 km (0.104 R)
• M6: 1,350,420 km (0.069 R)
• M7: 1,592,469 km (0.116 R)
• M8: 2,230,205 km (0.107 R)
• M9: 2,343,899 km (0.108 R)
• M10: 2,854,776 km (0.101 R)
• M11: 3,180,451 km (0.1 R)
• M12: 3,571,200 km (0.118 R)
• M13: 4,186,197 km (0.033 R)
• M14: 4,600,135 km (0.032 R)
• M15: 5,117,294 km (0.082 R)
• M16: 5,421,128 km (0.098 R)
• M17: 5,715,237 km (0.079 R)
• M18: 7,044,265 km (0.11 R)
• M19: 7,178,903 km (0.108 R)
• M20: 7,639,814 km (0.058 R)
• M21: 9,933,598 km (0.074 R)
• M22: 10,122,690 km (0.029 R)
• M23: 11,878,071 km (0.114 R)
• M24: 11,958,255 km (0.113 R)
• M25: 13,037,903 km (0.109 R)
• M26: 13,683,717 km (0.091 R)

Planet 4 - Ice Giant

Semi-Major Axis: 6.8 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 257.7

Radius: 5.5

Gravity: 8.52 G

Time & Orbit

Eccentricity (e): 0.215

Orbit Range: 5.34 AU - 8.26 AU

Year: 11449 Days

Day: 15.7 Hours

Environment

Temp: -225 °C

Axial Tilt: 25.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 49,934,142 km

• M1: 95,443 km (0.115 R)
• M2: 131,048 km (0.095 R)
• M3: 274,662 km (0.099 R)
• M4: 382,223 km (0.116 R)
• M5: 516,711 km (0.107 R)
• M6: 694,882 km (0.098 R)
• M7: 1,038,508 km (0.054 R)
• M8: 1,106,127 km (0.12 R)
• M9: 1,739,075 km (0.099 R)
• M10: 2,220,631 km (0.103 R)
• M11: 2,375,165 km (0.058 R)
• M12: 2,442,484 km (0.119 R)
• M13: 2,578,918 km (0.103 R)
• M14: 3,003,476 km (0.102 R)
• M15: 3,149,783 km (0.073 R)
• M16: 4,022,388 km (0.087 R)
• M17: 5,051,023 km (0.103 R)
• M18: 5,254,326 km (0.054 R)
• M19: 5,342,290 km (0.031 R)
• M20: 5,460,472 km (0.057 R)
• M21: 5,639,092 km (0.105 R)
• M22: 5,789,587 km (0.094 R)
• M23: 5,910,911 km (0.087 R)
• M24: 6,032,983 km (0.118 R)
• M25: 6,310,936 km (0.09 R)
• M26: 6,911,122 km (0.117 R)
• M27: 7,628,893 km (0.085 R)
• M28: 7,728,525 km (0.096 R)
• M29: 8,030,264 km (0.061 R)
• M30: 8,335,743 km (0.079 R)
• M31: 8,438,517 km (0.081 R)
• M32: 9,559,902 km (0.087 R)
• M33: 10,065,094 km (0.109 R)
• M34: 11,214,305 km (0.105 R)
• M35: 11,365,549 km (0.038 R)
• M36: 11,479,542 km (0.115 R)
• M37: 11,517,540 km (0.04 R)
• M38: 11,631,982 km (0.093 R)
• M39: 11,785,171 km (0.081 R)
• M40: 13,353,106 km (0.095 R)
• M41: 13,755,225 km (0.084 R)
• M42: 14,079,852 km (0.113 R)
• M43: 14,324,894 km (0.031 R)
• M44: 15,319,420 km (0.064 R)
• M45: 15,445,232 km (0.092 R)
• M46: 15,529,306 km (0.079 R)
• M47: 16,593,396 km (0.064 R)
• M48: 16,722,648 km (0.106 R)
• M49: 17,199,566 km (0.116 R)
• M50: 17,549,177 km (0.099 R)
• M51: 19,015,984 km (0.075 R)
• M52: 19,786,712 km (0.036 R)
• M53: 20,244,930 km (0.095 R)
• M54: 20,752,965 km (0.103 R)
• M55: 21,031,965 km (0.085 R)
• M56: 21,452,634 km (0.077 R)
• M57: 21,593,405 km (0.115 R)
• M58: 21,781,749 km (0.066 R)
• M59: 22,112,510 km (0.099 R)
• M60: 23,114,816 km (0.111 R)
• M61: 23,452,159 km (0.116 R)
• M62: 23,985,625 km (0.089 R)
• M63: 24,376,075 km (0.093 R)
• M64: 25,709,441 km (0.098 R)
• M65: 26,460,273 km (0.111 R)
• M66: 26,813,174 km (0.059 R)
• M67: 27,472,751 km (0.064 R)
• M68: 27,983,628 km (0.09 R)
• M69: 28,137,564 km (0.066 R)
• M70: 30,216,227 km (0.088 R)
• M71: 31,220,776 km (0.095 R)
• M72: 31,433,654 km (0.073 R)
• M73: 31,807,499 km (0.084 R)
• M74: 31,914,462 km (0.119 R)
• M75: 32,128,985 km (0.105 R)
• M76: 32,775,098 km (0.103 R)
• M77: 33,099,875 km (0.026 R)
• M78: 33,425,699 km (0.092 R)
• M79: 34,299,650 km (0.041 R)
• M80: 34,409,455 km (0.111 R)
• M81: 35,735,790 km (0.102 R)
• M82: 36,349,291 km (0.109 R)
• M83: 36,517,289 km (0.119 R)
• M84: 36,853,884 km (0.116 R)
• M85: 37,022,481 km (0.108 R)
• M86: 37,078,879 km (0.119 R)
• M87: 37,360,722 km (0.1 R)
• M88: 37,530,216 km (0.103 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.15 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 901.9

Radius: 6.1

Gravity: 24.24 G

Time & Orbit

Eccentricity (e): 0.235

Orbit Range: 5.47 AU - 8.83 AU

Year: 12345 Days

Day: 24.4 Hours

Environment

Temp: -222 °C

Axial Tilt: 13 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 49,934,142 km

• M1: 81,232 km (0.109 R)
• M2: 165,306 km (0.111 R)
• M3: 373,995 km (0.077 R)
• M4: 540,946 km (0.059 R)
• M5: 614,249 km (0.099 R)
• M6: 1,053,468 km (0.116 R)
• M7: 1,242,410 km (0.081 R)
• M8: 1,391,260 km (0.066 R)
• M9: 2,308,744 km (0.083 R)
• M10: 2,905,939 km (0.118 R)
• M11: 3,760,442 km (0.088 R)
• M12: 4,802,690 km (0.116 R)
• M13: 4,997,766 km (0.11 R)
• M14: 5,435,938 km (0.045 R)
• M15: 5,598,401 km (0.04 R)
• M16: 5,639,241 km (0.074 R)
• M17: 6,095,216 km (0.117 R)
• M18: 6,137,253 km (0.092 R)
• M19: 6,563,008 km (0.076 R)
• M20: 6,649,326 km (0.038 R)
• M21: 7,042,320 km (0.088 R)
• M22: 7,714,164 km (0.096 R)
• M23: 7,805,269 km (0.105 R)
• M24: 8,406,204 km (0.106 R)
• M25: 8,546,975 km (0.111 R)
• M26: 8,735,917 km (0.086 R)
• M27: 8,974,077 km (0.117 R)
• M28: 9,021,948 km (0.037 R)
• M29: 9,214,331 km (0.108 R)
• M30: 9,750,340 km (0.108 R)
• M31: 9,898,293 km (0.062 R)
• M32: 10,296,373 km (0.079 R)
• M33: 10,396,753 km (0.049 R)
• M34: 10,649,124 km (0.077 R)
• M35: 10,903,441 km (0.115 R)
• M36: 11,993,560 km (0.088 R)
• M37: 13,390,655 km (0.065 R)
• M38: 13,720,219 km (0.098 R)
• M39: 13,996,975 km (0.088 R)
• M40: 15,008,556 km (0.081 R)
• M41: 16,628,252 km (0.092 R)
• M42: 17,698,625 km (0.083 R)
• M43: 18,913,659 km (0.098 R)
• M44: 19,036,628 km (0.115 R)
• M45: 19,345,249 km (0.111 R)
• M46: 20,913,184 km (0.099 R)
• M47: 21,680,172 km (0.074 R)
• M48: 21,873,303 km (0.109 R)
• M49: 23,439,294 km (0.063 R)
• M50: 23,836,326 km (0.065 R)
• M51: 24,035,740 km (0.106 R)
• M52: 24,102,311 km (0.094 R)
• M53: 25,855,000 km (0.09 R)
• M54: 27,092,324 km (0.085 R)
• M55: 27,648,379 km (0.115 R)
• M56: 27,718,092 km (0.051 R)
• M57: 28,560,029 km (0.093 R)
• M58: 29,125,808 km (0.115 R)
• M59: 29,410,193 km (0.047 R)
• M60: 29,910,000 km (0.088 R)
• M61: 30,340,692 km (0.113 R)
• M62: 31,499,028 km (0.087 R)
• M63: 31,864,047 km (0.104 R)
• M64: 32,745,628 km (0.1 R)
• M65: 33,560,786 km (0.118 R)
• M66: 34,083,032 km (0.088 R)
• M67: 34,382,677 km (0.101 R)
• M68: 34,607,971 km (0.054 R)
• M69: 34,683,070 km (0.037 R)
• M70: 35,362,393 km (0.097 R)
• M71: 35,969,910 km (0.115 R)
• M72: 36,274,940 km (0.099 R)
• M73: 36,657,462 km (0.114 R)
• M74: 37,118,224 km (0.069 R)
• M75: 37,349,352 km (0.118 R)
• M76: 39,765,358 km (0.099 R)
• M77: 40,555,534 km (0.067 R)
• M78: 40,793,544 km (0.107 R)
• M79: 41,990,626 km (0.116 R)
• M80: 42,633,897 km (0.117 R)
• M81: 43,361,392 km (0.106 R)
• M82: 44,092,925 km (0.058 R)
• M83: 44,419,348 km (0.085 R)
• M84: 44,910,627 km (0.08 R)
• M85: 45,733,266 km (0.077 R)
• M86: 46,560,841 km (0.056 R)
• M87: 46,726,895 km (0.089 R)
• M88: 47,143,076 km (0.072 R)
• M89: 48,483,024 km (0.052 R)
• M90: 49,835,539 km (0.116 R)
• M91: 53,618,121 km (0.12 R)
• M92: 53,792,253 km (0.068 R)
• M93: 53,879,319 km (0.085 R)
• M94: 54,840,784 km (0.052 R)
• M95: 55,808,084 km (0.05 R)
• M96: 58,116,529 km (0.098 R)
• M97: 59,102,528 km (0.039 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.94 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 371.1

Radius: 6.1

Gravity: 9.97 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 7.57 AU - 8.31 AU

Year: 14446 Days

Day: 24.9 Hours

Environment

Temp: -220 °C

Axial Tilt: 9.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 49,934,142 km

• M1: 206,445 km (0.037 R)
• M2: 273,016 km (0.077 R)
• M3: 402,269 km (0.077 R)
• M4: 718,967 km (0.059 R)
• M5: 999,314 km (0.066 R)
• M6: 1,120,488 km (0.101 R)
• M7: 1,203,964 km (0.116 R)
• M8: 1,512,734 km (0.103 R)
• M9: 1,605,484 km (0.104 R)
• M10: 2,148,375 km (0.081 R)
• M11: 2,972,360 km (0.062 R)
• M12: 3,387,195 km (0.085 R)
• M13: 3,539,785 km (0.059 R)
• M14: 4,075,345 km (0.119 R)
• M15: 4,237,659 km (0.087 R)
• M16: 4,805,532 km (0.089 R)
• M17: 5,255,822 km (0.085 R)
• M18: 5,432,647 km (0.073 R)
• M19: 5,611,267 km (0.064 R)
• M20: 5,719,575 km (0.101 R)
• M21: 6,495,988 km (0.094 R)
• M22: 6,571,685 km (0.055 R)
• M23: 6,647,681 km (0.047 R)
• M24: 6,723,975 km (0.057 R)
• M25: 8,350,404 km (0.08 R)
• M26: 8,932,489 km (0.088 R)
• M27: 9,743,160 km (0.1 R)
• M28: 10,135,256 km (0.073 R)
• M29: 10,267,201 km (0.108 R)
• M30: 10,800,368 km (0.079 R)
• M31: 11,388,138 km (0.055 R)
• M32: 11,986,380 km (0.118 R)
• M33: 12,594,645 km (0.107 R)
• M34: 12,641,918 km (0.106 R)
• M35: 13,069,468 km (0.086 R)
• M36: 13,453,486 km (0.11 R)
• M37: 14,976,243 km (0.115 R)
• M38: 15,277,234 km (0.107 R)
• M39: 15,732,610 km (0.107 R)
• M40: 15,834,336 km (0.109 R)
• M41: 15,936,362 km (0.109 R)
• M42: 16,192,324 km (0.058 R)
• M43: 16,449,632 km (0.085 R)
• M44: 16,552,855 km (0.109 R)
• M45: 17,177,276 km (0.066 R)
• M46: 18,717,686 km (0.06 R)
• M47: 21,081,781 km (0.105 R)
• M48: 21,193,979 km (0.085 R)
• M49: 22,786,000 km (0.095 R)
• M50: 23,363,896 km (0.063 R)
• M51: 23,946,580 km (0.09 R)
• M52: 24,063,565 km (0.118 R)
• M53: 24,298,434 km (0.078 R)
• M54: 24,416,168 km (0.104 R)
• M55: 24,474,960 km (0.034 R)
• M56: 24,711,175 km (0.061 R)
• M57: 24,829,507 km (0.092 R)
• M58: 25,007,378 km (0.052 R)
• M59: 25,185,699 km (0.114 R)
• M60: 25,723,055 km (0.057 R)
• M61: 26,023,298 km (0.116 R)
• M62: 26,809,135 km (0.078 R)
• M63: 27,357,860 km (0.096 R)
• M64: 27,541,566 km (0.092 R)
• M65: 28,466,380 km (0.088 R)
• M66: 28,776,796 km (0.062 R)
• M67: 29,715,074 km (0.08 R)
• M68: 30,409,507 km (0.085 R)
• M69: 31,685,727 km (0.109 R)
• M70: 31,814,231 km (0.105 R)
• M71: 32,265,718 km (0.045 R)
• M72: 33,960,811 km (0.079 R)
• M73: 34,092,308 km (0.087 R)
• M74: 34,158,280 km (0.047 R)
• M75: 34,224,103 km (0.117 R)
• M76: 34,356,049 km (0.052 R)
• M77: 34,686,660 km (0.061 R)
• M78: 35,417,595 km (0.095 R)
• M79: 36,422,594 km (0.103 R)
• M80: 36,962,343 km (0.11 R)
• M81: 38,255,018 km (0.116 R)
• M82: 38,872,408 km (0.083 R)
• M83: 40,395,464 km (0.111 R)
• M84: 40,604,752 km (0.118 R)
• M85: 40,814,338 km (0.073 R)
• M86: 41,938,117 km (0.03 R)
• M87: 43,000,861 km (0.082 R)
• M88: 44,719,591 km (0.11 R)
• M89: 46,826,228 km (0.12 R)
• M90: 47,266,195 km (0.091 R)
• M91: 48,445,924 km (0.072 R)
• M92: 48,742,277 km (0.059 R)
• M93: 48,890,828 km (0.067 R)
• M94: 49,784,675 km (0.093 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 436 - 17,324 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit