🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.65 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.94

Radius: 0.98

Gravity: 0.98 G

Time & Orbit

Eccentricity (e): 0.123

Orbit Range: 0.57 AU - 0.73 AU

Year: 344 Days

Day: 29.2 Hours

Environment

Temp: -139 °C

Axial Tilt: 38.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.68 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 982.7

Radius: 13.3

Gravity: 5.56 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 0.66 AU - 0.7 AU

Year: 368 Days

Day: 11.2 Hours

Environment

Temp: -138 °C

Axial Tilt: 113.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (38)

Outer Limit: 80,580,614 km

• M1: 166,353 km (0.059 R)
• M2: 257,308 km (0.086 R)
• M3: 352,004 km (0.074 R)
• M4: 434,731 km (0.09 R)
• M5: 530,474 km (0.12 R)
• M6: 677,678 km (0.054 R)
• M7: 798,404 km (0.07 R)
• M8: 931,696 km (0.096 R)
• M9: 1,026,840 km (0.107 R)
• M10: 1,116,000 km (0.052 R)
• M11: 1,242,560 km (0.03 R)
• M12: 1,364,183 km (0.086 R)
• M13: 1,489,845 km (0.03 R)
• M14: 1,581,399 km (0.065 R)
• M15: 1,714,092 km (0.09 R)
• M16: 2,026,752 km (0.113 R)
• M17: 2,123,093 km (0.05 R)
• M18: 2,314,129 km (0.081 R)
• M19: 2,415,108 km (0.075 R)
• M20: 2,530,448 km (0.08 R)
• M21: 2,833,832 km (0.109 R)
• M22: 3,072,740 km (0.102 R)
• M23: 3,275,745 km (0.054 R)
• M24: 3,375,377 km (0.106 R)
• M25: 3,519,440 km (0.033 R)
• M26: 3,673,077 km (0.108 R)
• M27: 4,017,451 km (0.09 R)
• M28: 4,162,860 km (0.09 R)
• M29: 4,263,390 km (0.053 R)
• M30: 4,356,739 km (0.111 R)
• M31: 4,458,914 km (0.048 R)
• M32: 4,673,437 km (0.025 R)
• M33: 4,786,085 km (0.105 R)
• M34: 4,875,245 km (0.032 R)
• M35: 5,079,895 km (0.096 R)
• M36: 5,162,623 km (0.109 R)
• M37: 5,430,253 km (0.053 R)
• M38: 5,693,994 km (0.117 R)

Asteroid Belt

Center: 1.52 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 3 - Gas Giant

Semi-Major Axis: 2.36 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 720.3

Radius: 11.4

Gravity: 5.54 G

Time & Orbit

Eccentricity (e): 0.214

Orbit Range: 1.85 AU - 2.87 AU

Year: 2378 Days

Day: 6.8 Hours

Environment

Temp: -193 °C

Axial Tilt: 36.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 80,580,614 km

• M1: 142,417 km (0.106 R)
• M2: 219,610 km (0.12 R)
• M3: 295,905 km (0.06 R)
• M4: 442,361 km (0.106 R)
• M5: 618,288 km (0.1 R)
• M6: 702,811 km (0.106 R)
• M7: 884,871 km (0.034 R)
• M8: 962,363 km (0.09 R)
• M9: 1,124,976 km (0.109 R)
• M10: 1,307,934 km (0.1 R)
• M11: 1,559,857 km (0.114 R)
• M12: 1,740,721 km (0.102 R)
• M13: 1,967,212 km (0.076 R)
• M14: 2,176,649 km (0.063 R)
• M15: 2,435,154 km (0.082 R)
• M16: 2,532,842 km (0.12 R)
• M17: 2,996,745 km (0.097 R)
• M18: 3,193,017 km (0.062 R)
• M19: 3,331,245 km (0.03 R)
• M20: 3,471,718 km (0.041 R)
• M21: 3,629,992 km (0.109 R)
• M22: 4,169,442 km (0.118 R)
• M23: 4,474,323 km (0.118 R)
• M24: 5,106,075 km (0.068 R)
• M25: 5,286,639 km (0.104 R)
• M26: 5,765,951 km (0.086 R)
• M27: 5,953,995 km (0.07 R)
• M28: 6,048,840 km (0.082 R)
• M29: 6,452,605 km (0.087 R)
• M30: 6,766,162 km (0.1 R)
• M31: 6,944,632 km (0.088 R)
• M32: 7,448,927 km (0.051 R)
• M33: 7,840,125 km (0.11 R)
• M34: 8,301,635 km (0.092 R)
• M35: 8,771,821 km (0.054 R)
• M36: 8,879,980 km (0.052 R)
• M37: 9,032,121 km (0.083 R)
• M38: 9,449,350 km (0.105 R)
• M39: 9,783,102 km (0.061 R)
• M40: 9,895,301 km (0.11 R)
• M41: 10,075,566 km (0.058 R)
• M42: 10,211,551 km (0.111 R)
• M43: 10,371,022 km (0.069 R)
• M44: 10,600,206 km (0.079 R)
• M45: 10,784,810 km (0.041 R)
• M46: 10,877,411 km (0.112 R)
• M47: 11,086,997 km (0.079 R)
• M48: 11,723,536 km (0.104 R)
• M49: 12,154,528 km (0.106 R)
• M50: 12,371,894 km (0.06 R)
• M51: 13,081,436 km (0.037 R)
• M52: 13,428,653 km (0.109 R)
• M53: 13,553,417 km (0.113 R)
• M54: 13,728,746 km (0.114 R)
• M55: 13,829,276 km (0.092 R)
• M56: 13,904,823 km (0.035 R)
• M57: 14,642,340 km (0.08 R)
• M58: 14,951,110 km (0.065 R)
• M59: 15,158,303 km (0.082 R)
• M60: 15,392,424 km (0.101 R)
• M61: 16,849,358 km (0.099 R)
• M62: 16,930,141 km (0.087 R)
• M63: 17,173,088 km (0.086 R)
• M64: 17,335,700 km (0.076 R)
• M65: 17,526,139 km (0.075 R)
• M66: 17,799,304 km (0.078 R)
• M67: 18,211,746 km (0.032 R)
• M68: 18,405,325 km (0.088 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 124.9

Radius: 14.1

Gravity: 0.63 G

Time & Orbit

Eccentricity (e): 0.113

Orbit Range: 2.33 AU - 2.93 AU

Year: 2798 Days

Day: 9.6 Hours

Environment

Temp: -206 °C

Axial Tilt: 26.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (37)

Outer Limit: 80,580,614 km

• M1: 205,398 km (0.101 R)
• M2: 474,375 km (0.076 R)
• M3: 598,840 km (0.043 R)
• M4: 929,003 km (0.034 R)
• M5: 1,215,034 km (0.119 R)
• M6: 1,479,972 km (0.086 R)
• M7: 1,799,962 km (0.062 R)
• M8: 1,982,321 km (0.098 R)
• M9: 2,104,393 km (0.117 R)
• M10: 2,199,986 km (0.098 R)
• M11: 2,455,799 km (0.034 R)
• M12: 2,690,368 km (0.095 R)
• M13: 3,137,965 km (0.116 R)
• M14: 3,326,009 km (0.085 R)
• M15: 3,415,768 km (0.065 R)
• M16: 3,540,682 km (0.098 R)
• M17: 3,632,386 km (0.117 R)
• M18: 3,830,154 km (0.106 R)
• M19: 4,285,231 km (0.052 R)
• M20: 4,656,832 km (0.066 R)
• M21: 4,821,091 km (0.083 R)
• M22: 5,444,764 km (0.108 R)
• M23: 5,631,462 km (0.08 R)
• M24: 5,983,915 km (0.031 R)
• M25: 6,554,631 km (0.11 R)
• M26: 7,718,053 km (0.106 R)
• M27: 7,943,348 km (0.086 R)
• M28: 8,216,663 km (0.085 R)
• M29: 8,431,336 km (0.118 R)
• M30: 8,710,186 km (0.097 R)
• M31: 9,229,291 km (0.04 R)
• M32: 9,709,949 km (0.105 R)
• M33: 9,953,345 km (0.117 R)
• M34: 10,429,814 km (0.102 R)
• M35: 10,695,799 km (0.104 R)
• M36: 10,829,689 km (0.105 R)
• M37: 11,421,947 km (0.066 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.18 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 293.8

Radius: 13.2

Gravity: 1.69 G

Time & Orbit

Eccentricity (e): 0.177

Orbit Range: 3.44 AU - 4.92 AU

Year: 5606 Days

Day: 9.6 Hours

Environment

Temp: -212 °C

Axial Tilt: 17.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 80,580,614 km

• M1: 181,612 km (0.07 R)
• M2: 359,484 km (0.095 R)
• M3: 453,581 km (0.071 R)
• M4: 550,221 km (0.041 R)
• M5: 758,461 km (0.071 R)
• M6: 867,817 km (0.108 R)
• M7: 959,521 km (0.104 R)
• M8: 1,103,883 km (0.043 R)
• M9: 1,204,412 km (0.086 R)
• M10: 1,361,640 km (0.1 R)
• M11: 1,456,784 km (0.103 R)
• M12: 1,568,234 km (0.119 R)
• M13: 2,106,787 km (0.111 R)
• M14: 2,202,081 km (0.064 R)
• M15: 2,364,095 km (0.076 R)
• M16: 2,463,428 km (0.053 R)
• M17: 2,564,108 km (0.071 R)
• M18: 2,700,541 km (0.099 R)
• M19: 3,052,545 km (0.096 R)
• M20: 3,456,908 km (0.113 R)
• M21: 3,839,579 km (0.08 R)
• M22: 4,036,151 km (0.057 R)
• M23: 4,155,679 km (0.117 R)
• M24: 4,316,946 km (0.097 R)
• M25: 4,439,167 km (0.074 R)
• M26: 5,046,983 km (0.096 R)
• M27: 5,175,937 km (0.087 R)
• M28: 5,680,979 km (0.107 R)
• M29: 5,770,439 km (0.108 R)
• M30: 5,882,936 km (0.026 R)
• M31: 6,201,879 km (0.103 R)
• M32: 6,386,632 km (0.093 R)
• M33: 6,526,506 km (0.087 R)
• M34: 6,928,177 km (0.102 R)
• M35: 7,048,004 km (0.092 R)
• M36: 7,240,986 km (0.085 R)
• M37: 7,338,075 km (0.114 R)
• M38: 7,805,568 km (0.098 R)
• M39: 8,131,093 km (0.077 R)
• M40: 8,486,687 km (0.1 R)
• M41: 9,055,758 km (0.066 R)
• M42: 9,265,793 km (0.072 R)
• M43: 9,397,888 km (0.11 R)
• M44: 10,614,867 km (0.11 R)
• M45: 11,453,662 km (0.078 R)
• M46: 11,595,630 km (0.053 R)
• M47: 11,938,508 km (0.094 R)
• M48: 12,111,294 km (0.099 R)
• M49: 12,197,911 km (0.118 R)
• M50: 12,605,266 km (0.063 R)
• M51: 13,016,960 km (0.08 R)
• M52: 13,194,831 km (0.116 R)
• M53: 13,373,451 km (0.088 R)
• M54: 13,944,466 km (0.116 R)
• M55: 14,126,377 km (0.1 R)
• M56: 14,677,047 km (0.099 R)
• M57: 15,079,166 km (0.037 R)
• M58: 15,641,953 km (0.075 R)
• M59: 16,052,749 km (0.114 R)
• M60: 17,014,215 km (0.113 R)
• M61: 17,632,802 km (0.071 R)
• M62: 17,994,380 km (0.116 R)
• M63: 18,892,117 km (0.099 R)
• M64: 19,160,944 km (0.114 R)
• M65: 19,975,056 km (0.058 R)
• M66: 20,077,680 km (0.087 R)
• M67: 20,317,635 km (0.118 R)
• M68: 20,904,507 km (0.066 R)
• M69: 21,147,753 km (0.097 R)
• M70: 21,847,871 km (0.078 R)
• M71: 22,378,046 km (0.056 R)
• M72: 22,520,164 km (0.103 R)
• M73: 23,415,059 km (0.102 R)
• M74: 24,467,629 km (0.055 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.39 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 59.9

Radius: 12.3

Gravity: 0.4 G

Time & Orbit

Eccentricity (e): 0.128

Orbit Range: 3.83 AU - 4.95 AU

Year: 6034 Days

Day: 9 Hours

Environment

Temp: -206 °C

Axial Tilt: 37.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (43)

Outer Limit: 80,580,614 km

• M1: 155,432 km (0.12 R)
• M2: 341,682 km (0.062 R)
• M3: 642,822 km (0.11 R)
• M4: 724,203 km (0.106 R)
• M5: 841,638 km (0.086 R)
• M6: 1,124,527 km (0.09 R)
• M7: 1,438,084 km (0.099 R)
• M8: 1,548,787 km (0.1 R)
• M9: 1,662,631 km (0.057 R)
• M10: 2,089,583 km (0.092 R)
• M11: 2,227,811 km (0.059 R)
• M12: 2,309,941 km (0.105 R)
• M13: 2,441,138 km (0.032 R)
• M14: 2,698,596 km (0.084 R)
• M15: 2,862,555 km (0.104 R)
• M16: 3,095,180 km (0.073 R)
• M17: 3,187,332 km (0.094 R)
• M18: 3,360,866 km (0.045 R)
• M19: 3,469,324 km (0.052 R)
• M20: 3,565,216 km (0.089 R)
• M21: 3,844,067 km (0.1 R)
• M22: 4,261,146 km (0.099 R)
• M23: 4,692,736 km (0.07 R)
• M24: 4,799,100 km (0.106 R)
• M25: 5,014,221 km (0.094 R)
• M26: 5,438,182 km (0.078 R)
• M27: 6,187,218 km (0.053 R)
• M28: 6,354,319 km (0.096 R)
• M29: 6,847,543 km (0.061 R)
• M30: 7,762,933 km (0.105 R)
• M31: 7,889,044 km (0.117 R)
• M32: 8,548,770 km (0.115 R)
• M33: 8,791,418 km (0.081 R)
• M34: 9,264,447 km (0.04 R)
• M35: 9,379,188 km (0.061 R)
• M36: 10,097,557 km (0.105 R)
• M37: 10,833,429 km (0.112 R)
• M38: 11,648,588 km (0.062 R)
• M39: 12,084,366 km (0.085 R)
• M40: 12,865,417 km (0.116 R)
• M41: 13,165,211 km (0.041 R)
• M42: 13,902,878 km (0.057 R)
• M43: 15,169,523 km (0.099 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 114.2

Radius: 12.3

Gravity: 0.75 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 4.82 AU - 5.28 AU

Year: 7445 Days

Day: 9.1 Hours

Environment

Temp: -212 °C

Axial Tilt: 37.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 80,580,614 km

• M1: 156,479 km (0.119 R)
• M2: 264,788 km (0.107 R)
• M3: 379,231 km (0.11 R)
• M4: 874,549 km (0.1 R)
• M5: 1,036,264 km (0.092 R)
• M6: 1,390,512 km (0.03 R)
• M7: 1,491,491 km (0.055 R)
• M8: 2,480,034 km (0.102 R)
• M9: 2,604,200 km (0.1 R)
• M10: 2,778,332 km (0.067 R)
• M11: 3,005,571 km (0.103 R)
• M12: 3,088,298 km (0.098 R)
• M13: 3,618,025 km (0.065 R)
• M14: 3,975,115 km (0.093 R)
• M15: 4,158,073 km (0.089 R)
• M16: 4,381,123 km (0.1 R)
• M17: 5,034,866 km (0.085 R)
• M18: 5,454,039 km (0.08 R)
• M19: 5,801,705 km (0.074 R)
• M20: 6,051,533 km (0.058 R)
• M21: 6,368,830 km (0.048 R)
• M22: 6,865,944 km (0.095 R)
• M23: 7,308,454 km (0.116 R)
• M24: 7,488,121 km (0.066 R)
• M25: 7,623,807 km (0.091 R)
• M26: 7,851,794 km (0.031 R)
• M27: 8,174,776 km (0.116 R)
• M28: 8,337,987 km (0.078 R)
• M29: 8,596,492 km (0.097 R)
• M30: 9,266,691 km (0.059 R)
• M31: 9,706,508 km (0.105 R)
• M32: 10,103,092 km (0.097 R)
• M33: 10,278,421 km (0.059 R)
• M34: 10,631,921 km (0.054 R)
• M35: 11,376,768 km (0.096 R)
• M36: 11,559,128 km (0.08 R)
• M37: 11,821,373 km (0.057 R)
• M38: 12,378,476 km (0.093 R)
• M39: 13,408,158 km (0.092 R)
• M40: 13,573,314 km (0.098 R)
• M41: 13,961,221 km (0.112 R)
• M42: 14,128,621 km (0.108 R)
• M43: 14,437,242 km (0.096 R)
• M44: 14,662,985 km (0.113 R)
• M45: 15,809,802 km (0.087 R)
• M46: 16,159,412 km (0.104 R)
• M47: 16,718,310 km (0.094 R)
• M48: 17,673,792 km (0.089 R)
• M49: 18,127,821 km (0.092 R)
• M50: 18,585,740 km (0.096 R)
• M51: 20,360,270 km (0.051 R)
• M52: 20,581,825 km (0.091 R)
• M53: 20,708,833 km (0.114 R)
• M54: 20,899,870 km (0.055 R)
• M55: 20,995,612 km (0.061 R)
• M56: 21,123,519 km (0.118 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.4 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 672.3

Radius: 3.2

Gravity: 65.65 G

Time & Orbit

Eccentricity (e): 0.013

Orbit Range: 10.26 AU - 10.54 AU

Year: 22002 Days

Day: 19.1 Hours

Environment

Temp: -240 °C

Axial Tilt: 98.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 80,580,614 km

• M1: 46,974 km (0.116 R)
• M2: 77,193 km (0.092 R)
• M3: 159,172 km (0.118 R)
• M4: 202,855 km (0.084 R)
• M5: 589,864 km (0.08 R)
• M6: 660,175 km (0.088 R)
• M7: 733,030 km (0.118 R)
• M8: 886,816 km (0.034 R)
• M9: 967,449 km (0.052 R)
• M10: 1,050,476 km (0.063 R)
• M11: 1,499,569 km (0.111 R)
• M12: 2,780,127 km (0.1 R)
• M13: 3,346,056 km (0.115 R)
• M14: 4,034,804 km (0.104 R)
• M15: 4,258,752 km (0.1 R)
• M16: 5,734,984 km (0.086 R)
• M17: 6,868,786 km (0.111 R)
• M18: 6,975,150 km (0.076 R)
• M19: 7,082,113 km (0.076 R)
• M20: 7,625,003 km (0.097 R)
• M21: 7,901,610 km (0.089 R)
• M22: 7,957,260 km (0.12 R)
• M23: 8,578,391 km (0.062 R)
• M24: 8,635,687 km (0.101 R)
• M25: 8,692,983 km (0.108 R)
• M26: 9,747,199 km (0.102 R)
• M27: 9,806,888 km (0.117 R)
• M28: 9,986,855 km (0.098 R)
• M29: 10,840,909 km (0.088 R)
• M30: 11,781,580 km (0.05 R)
• M31: 12,165,149 km (0.096 R)
• M32: 12,423,206 km (0.084 R)
• M33: 12,487,981 km (0.102 R)
• M34: 13,010,228 km (0.109 R)
• M35: 13,739,966 km (0.11 R)
• M36: 14,075,963 km (0.066 R)
• M37: 14,143,431 km (0.065 R)
• M38: 15,100,259 km (0.101 R)
• M39: 15,726,327 km (0.072 R)
• M40: 16,645,306 km (0.105 R)
• M41: 17,509,084 km (0.076 R)
• M42: 19,430,071 km (0.114 R)
• M43: 20,491,617 km (0.104 R)
• M44: 21,416,581 km (0.077 R)
• M45: 21,572,013 km (0.084 R)
• M46: 24,190,724 km (0.085 R)
• M47: 24,433,671 km (0.118 R)
• M48: 25,167,448 km (0.111 R)
• M49: 26,157,188 km (0.106 R)
• M50: 26,489,893 km (0.084 R)
• M51: 27,243,567 km (0.057 R)
• M52: 27,919,451 km (0.119 R)
• M53: 29,201,355 km (0.093 R)
• M54: 31,028,244 km (0.085 R)
• M55: 31,822,459 km (0.109 R)
• M56: 32,088,594 km (0.058 R)
• M57: 32,266,466 km (0.079 R)
• M58: 32,891,635 km (0.026 R)
• M59: 35,523,959 km (0.107 R)
• M60: 35,800,117 km (0.106 R)
• M61: 37,191,377 km (0.118 R)
• M62: 37,378,225 km (0.108 R)
• M63: 38,034,660 km (0.109 R)
• M64: 38,979,072 km (0.086 R)
• M65: 39,263,756 km (0.099 R)
• M66: 40,602,059 km (0.107 R)
• M67: 41,373,386 km (0.037 R)
• M68: 44,111,027 km (0.071 R)
• M69: 44,705,229 km (0.101 R)
• M70: 48,223,921 km (0.105 R)
• M71: 49,245,375 km (0.05 R)
• M72: 50,170,937 km (0.072 R)
• M73: 52,352,523 km (0.093 R)
• M74: 52,561,960 km (0.108 R)
• M75: 52,666,828 km (0.1 R)
• M76: 52,981,582 km (0.05 R)
• M77: 53,824,117 km (0.046 R)
• M78: 54,352,946 km (0.117 R)
• M79: 56,915,407 km (0.049 R)
• M80: 57,994,607 km (0.112 R)
• M81: 60,282,856 km (0.112 R)
• M82: 61,603,655 km (0.088 R)
• M83: 61,935,314 km (0.087 R)
• M84: 63,714,182 km (0.094 R)
• M85: 65,848,495 km (0.112 R)
• M86: 66,754,160 km (0.055 R)
• M87: 66,981,100 km (0.08 R)
• M88: 67,094,795 km (0.051 R)
• M89: 72,040,650 km (0.097 R)
• M90: 74,145,641 km (0.106 R)
• M91: 74,616,127 km (0.038 R)
• M92: 75,915,235 km (0.066 R)
• M93: 77,221,673 km (0.047 R)
• M94: 78,296,085 km (0.076 R)
• M95: 79,375,583 km (0.105 R)

Kuiper Belt

Range: 30 - 59 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 262 - 17,270 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit