🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.05

Radius: 1.02

Gravity: 1.01 G

Time & Orbit

Eccentricity (e): 0.108

Orbit Range: 0.54 AU - 0.66 AU

Year: 300 Days

Day: 26.6 Hours

Environment

Temp: -134 °C

Axial Tilt: 1.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.82

Radius: 1.88

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.028

Orbit Range: 0.58 AU - 0.62 AU

Year: 300 Days

Day: 26.5 Hours

Environment

Temp: -125 °C

Axial Tilt: 19.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 68,401,817 km

• M1: 672,143 km (0.118 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.24 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 123.3

Radius: 11.6

Gravity: 0.92 G

Time & Orbit

Eccentricity (e): 0.065

Orbit Range: 1.16 AU - 1.32 AU

Year: 892 Days

Day: 12 Hours

Environment

Temp: -171 °C

Axial Tilt: 38.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (43)

Outer Limit: 68,401,817 km

• M1: 147,354 km (0.113 R)
• M2: 227,389 km (0.035 R)
• M3: 300,692 km (0.096 R)
• M4: 382,223 km (0.099 R)
• M5: 477,516 km (0.106 R)
• M6: 607,367 km (0.083 R)
• M7: 683,064 km (0.042 R)
• M8: 770,130 km (0.081 R)
• M9: 881,730 km (0.064 R)
• M10: 973,733 km (0.098 R)
• M11: 1,091,466 km (0.102 R)
• M12: 1,204,861 km (0.111 R)
• M13: 1,361,191 km (0.087 R)
• M14: 1,459,178 km (0.116 R)
• M15: 1,534,425 km (0.06 R)
• M16: 1,636,900 km (0.03 R)
• M17: 1,720,525 km (0.117 R)
• M18: 1,827,338 km (0.06 R)
• M19: 2,014,036 km (0.116 R)
• M20: 2,098,409 km (0.107 R)
• M21: 2,172,610 km (0.066 R)
• M22: 2,317,869 km (0.081 R)
• M23: 2,442,335 km (0.118 R)
• M24: 2,692,014 km (0.079 R)
• M25: 2,810,645 km (0.058 R)
• M26: 2,886,491 km (0.075 R)
• M27: 2,975,801 km (0.053 R)
• M28: 3,118,068 km (0.105 R)
• M29: 3,249,415 km (0.093 R)
• M30: 3,382,707 km (0.037 R)
• M31: 3,504,181 km (0.097 R)
• M32: 3,606,655 km (0.086 R)
• M33: 3,696,264 km (0.059 R)
• M34: 4,026,277 km (0.107 R)
• M35: 4,104,966 km (0.038 R)
• M36: 4,234,817 km (0.073 R)
• M37: 4,483,897 km (0.091 R)
• M38: 4,587,867 km (0.072 R)
• M39: 4,677,626 km (0.103 R)
• M40: 4,767,983 km (0.11 R)
• M41: 4,889,457 km (0.074 R)
• M42: 5,096,650 km (0.097 R)
• M43: 5,189,700 km (0.109 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.34 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 419.3

Radius: 13.8

Gravity: 2.2 G

Time & Orbit

Eccentricity (e): 0.17

Orbit Range: 1.11 AU - 1.57 AU

Year: 1002 Days

Day: 5.1 Hours

Environment

Temp: -178 °C

Axial Tilt: 23.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 68,401,817 km

• M1: 173,833 km (0.078 R)
• M2: 270,772 km (0.11 R)
• M3: 411,693 km (0.119 R)
• M4: 661,671 km (0.049 R)
• M5: 753,674 km (0.11 R)
• M6: 924,066 km (0.074 R)
• M7: 1,059,602 km (0.071 R)
• M8: 1,170,753 km (0.118 R)
• M9: 1,273,227 km (0.108 R)
• M10: 1,412,653 km (0.116 R)
• M11: 1,515,576 km (0.048 R)
• M12: 1,628,373 km (0.09 R)
• M13: 1,766,003 km (0.06 R)
• M14: 1,870,123 km (0.099 R)
• M15: 2,038,121 km (0.099 R)
• M16: 2,132,069 km (0.11 R)
• M17: 2,219,434 km (0.119 R)
• M18: 2,373,221 km (0.034 R)
• M19: 2,505,615 km (0.111 R)
• M20: 2,709,068 km (0.119 R)
• M21: 2,874,074 km (0.028 R)
• M22: 2,971,163 km (0.11 R)
• M23: 3,060,324 km (0.108 R)
• M24: 3,324,364 km (0.05 R)
• M25: 3,454,514 km (0.113 R)
• M26: 3,643,606 km (0.035 R)
• M27: 3,943,400 km (0.09 R)
• M28: 4,211,180 km (0.079 R)
• M29: 4,464,599 km (0.081 R)
• M30: 4,567,373 km (0.115 R)
• M31: 4,660,572 km (0.11 R)
• M32: 4,764,842 km (0.111 R)
• M33: 5,136,144 km (0.043 R)
• M34: 5,233,233 km (0.056 R)
• M35: 5,660,783 km (0.104 R)
• M36: 5,783,603 km (0.115 R)
• M37: 5,907,171 km (0.084 R)
• M38: 6,008,898 km (0.101 R)
• M39: 6,122,742 km (0.119 R)
• M40: 6,306,298 km (0.077 R)
• M41: 6,398,750 km (0.105 R)
• M42: 6,596,817 km (0.059 R)
• M43: 6,773,193 km (0.07 R)
• M44: 6,951,215 km (0.074 R)
• M45: 7,336,280 km (0.063 R)
• M46: 7,458,052 km (0.114 R)
• M47: 7,654,325 km (0.109 R)
• M48: 7,790,309 km (0.111 R)
• M49: 7,939,608 km (0.057 R)
• M50: 8,127,353 km (0.066 R)
• M51: 8,342,176 km (0.118 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.87 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 405.2

Radius: 8

Gravity: 6.33 G

Time & Orbit

Eccentricity (e): 0.18

Orbit Range: 2.35 AU - 3.39 AU

Year: 3139 Days

Day: 5.5 Hours

Environment

Temp: -193 °C

Axial Tilt: 8.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 68,401,817 km

• M1: 168,298 km (0.103 R)
• M2: 225,743 km (0.098 R)
• M3: 299,944 km (0.119 R)
• M4: 509,979 km (0.09 R)
• M5: 606,919 km (0.101 R)
• M6: 684,111 km (0.1 R)
• M7: 848,818 km (0.096 R)
• M8: 926,310 km (0.12 R)
• M9: 1,067,830 km (0.082 R)
• M10: 1,130,810 km (0.095 R)
• M11: 1,534,874 km (0.091 R)
• M12: 1,790,387 km (0.052 R)
• M13: 1,840,503 km (0.097 R)
• M14: 1,942,379 km (0.086 R)
• M15: 2,059,364 km (0.086 R)
• M16: 2,205,521 km (0.108 R)
• M17: 2,259,526 km (0.103 R)
• M18: 2,341,356 km (0.11 R)
• M19: 2,550,344 km (0.094 R)
• M20: 2,750,955 km (0.12 R)
• M21: 3,076,630 km (0.058 R)
• M22: 3,228,771 km (0.083 R)
• M23: 3,367,747 km (0.1 R)
• M24: 3,493,110 km (0.07 R)
• M25: 4,026,277 km (0.113 R)
• M26: 4,159,270 km (0.092 R)
• M27: 4,671,343 km (0.111 R)
• M28: 4,793,714 km (0.101 R)
• M29: 5,077,501 km (0.086 R)
• M30: 5,421,576 km (0.111 R)
• M31: 5,717,182 km (0.104 R)
• M32: 5,848,230 km (0.116 R)
• M33: 5,999,174 km (0.065 R)
• M34: 6,113,317 km (0.039 R)
• M35: 6,170,613 km (0.117 R)
• M36: 6,228,059 km (0.093 R)
• M37: 6,324,250 km (0.03 R)
• M38: 7,011,503 km (0.085 R)
• M39: 7,681,103 km (0.092 R)
• M40: 8,584,075 km (0.086 R)
• M41: 8,648,253 km (0.092 R)
• M42: 9,277,611 km (0.111 R)
• M43: 9,387,715 km (0.083 R)
• M44: 9,520,259 km (0.096 R)
• M45: 9,653,401 km (0.108 R)
• M46: 9,720,271 km (0.098 R)
• M47: 9,787,291 km (0.092 R)
• M48: 10,101,895 km (0.119 R)
• M49: 10,626,086 km (0.094 R)
• M50: 10,741,277 km (0.067 R)
• M51: 10,879,954 km (0.106 R)
• M52: 11,229,265 km (0.072 R)
• M53: 11,653,375 km (0.097 R)
• M54: 12,106,806 km (0.091 R)
• M55: 12,178,912 km (0.102 R)
• M56: 12,299,488 km (0.068 R)
• M57: 13,154,141 km (0.096 R)
• M58: 13,626,122 km (0.096 R)
• M59: 13,901,831 km (0.074 R)
• M60: 13,952,245 km (0.086 R)
• M61: 14,230,198 km (0.048 R)
• M62: 14,868,682 km (0.088 R)
• M63: 14,920,293 km (0.074 R)
• M64: 15,204,529 km (0.077 R)
• M65: 15,308,350 km (0.038 R)
• M66: 15,516,590 km (0.116 R)
• M67: 16,226,731 km (0.093 R)
• M68: 16,465,789 km (0.101 R)
• M69: 16,545,674 km (0.068 R)
• M70: 16,625,859 km (0.054 R)
• M71: 16,839,933 km (0.056 R)
• M72: 17,001,200 km (0.102 R)
• M73: 17,189,992 km (0.039 R)
• M74: 17,406,460 km (0.049 R)
• M75: 17,569,522 km (0.069 R)
• M76: 17,787,636 km (0.108 R)
• M77: 17,842,388 km (0.098 R)
• M78: 18,226,705 km (0.111 R)
• M79: 18,502,863 km (0.089 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 277.5

Radius: 11.1

Gravity: 2.25 G

Time & Orbit

Eccentricity (e): 0.077

Orbit Range: 4.38 AU - 5.12 AU

Year: 6684 Days

Day: 6.1 Hours

Environment

Temp: -208 °C

Axial Tilt: 10.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 68,401,817 km

• M1: 161,117 km (0.116 R)
• M2: 299,794 km (0.062 R)
• M3: 448,794 km (0.045 R)
• M4: 616,343 km (0.072 R)
• M5: 737,069 km (0.105 R)
• M6: 842,236 km (0.053 R)
• M7: 952,938 km (0.062 R)
• M8: 1,055,862 km (0.094 R)
• M9: 1,162,675 km (0.101 R)
• M10: 1,259,464 km (0.099 R)
• M11: 2,112,920 km (0.088 R)
• M12: 2,319,515 km (0.073 R)
• M13: 2,443,083 km (0.106 R)
• M14: 2,514,740 km (0.036 R)
• M15: 2,827,250 km (0.107 R)
• M16: 2,902,647 km (0.047 R)
• M17: 3,055,537 km (0.115 R)
• M18: 3,152,476 km (0.089 R)
• M19: 3,329,600 km (0.069 R)
• M20: 3,429,382 km (0.097 R)
• M21: 3,673,226 km (0.1 R)
• M22: 3,776,449 km (0.12 R)
• M23: 4,134,885 km (0.076 R)
• M24: 4,482,251 km (0.103 R)
• M25: 4,570,664 km (0.11 R)
• M26: 4,816,603 km (0.087 R)
• M27: 5,275,120 km (0.092 R)
• M28: 5,628,321 km (0.061 R)
• M29: 6,062,304 km (0.12 R)
• M30: 6,233,893 km (0.104 R)
• M31: 6,532,041 km (0.099 R)
• M32: 6,962,435 km (0.117 R)
• M33: 7,065,059 km (0.078 R)
• M34: 7,245,922 km (0.075 R)
• M35: 7,349,893 km (0.106 R)
• M36: 7,428,282 km (0.09 R)
• M37: 7,771,011 km (0.062 R)
• M38: 8,038,193 km (0.106 R)
• M39: 8,145,903 km (0.071 R)
• M40: 8,308,367 km (0.091 R)
• M41: 8,885,665 km (0.115 R)
• M42: 8,969,290 km (0.098 R)
• M43: 9,081,040 km (0.042 R)
• M44: 9,589,822 km (0.08 R)
• M45: 9,761,411 km (0.038 R)
• M46: 9,876,451 km (0.1 R)
• M47: 10,195,095 km (0.053 R)
• M48: 10,842,554 km (0.088 R)
• M49: 11,171,371 km (0.105 R)
• M50: 11,930,729 km (0.1 R)
• M51: 12,487,832 km (0.096 R)
• M52: 12,644,012 km (0.066 R)
• M53: 12,990,032 km (0.035 R)
• M54: 13,723,809 km (0.05 R)
• M55: 15,098,165 km (0.04 R)
• M56: 15,331,388 km (0.044 R)
• M57: 15,431,768 km (0.106 R)
• M58: 15,599,468 km (0.053 R)
• M59: 16,447,388 km (0.086 R)
• M60: 16,687,493 km (0.107 R)
• M61: 17,032,466 km (0.03 R)
• M62: 17,764,747 km (0.092 R)
• M63: 18,578,410 km (0.067 R)
• M64: 19,043,809 km (0.097 R)
• M65: 21,315,453 km (0.104 R)
• M66: 21,390,102 km (0.116 R)
• M67: 21,689,746 km (0.101 R)
• M68: 21,840,092 km (0.087 R)
• M69: 22,066,284 km (0.075 R)
• M70: 22,940,684 km (0.088 R)
• M71: 23,247,360 km (0.049 R)
• M72: 24,801,532 km (0.102 R)
• M73: 25,630,902 km (0.095 R)
• M74: 26,348,972 km (0.114 R)
• M75: 26,549,583 km (0.108 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 722.4

Radius: 10.3

Gravity: 6.81 G

Time & Orbit

Eccentricity (e): 0.23

Orbit Range: 3.93 AU - 6.27 AU

Year: 7437 Days

Day: 6.6 Hours

Environment

Temp: -207 °C

Axial Tilt: 138 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 68,401,817 km

• M1: 146,606 km (0.058 R)
• M2: 258,356 km (0.074 R)
• M3: 367,412 km (0.078 R)
• M4: 459,565 km (0.094 R)
• M5: 700,118 km (0.097 R)
• M6: 1,134,849 km (0.097 R)
• M7: 1,564,644 km (0.052 R)
• M8: 1,684,921 km (0.072 R)
• M9: 1,787,545 km (0.108 R)
• M10: 2,241,574 km (0.091 R)
• M11: 2,424,084 km (0.078 R)
• M12: 2,658,953 km (0.042 R)
• M13: 2,731,059 km (0.108 R)
• M14: 3,025,467 km (0.045 R)
• M15: 3,460,348 km (0.107 R)
• M16: 3,565,516 km (0.108 R)
• M17: 3,725,436 km (0.1 R)
• M18: 3,914,976 km (0.119 R)
• M19: 4,052,307 km (0.098 R)
• M20: 4,617,787 km (0.114 R)
• M21: 4,939,422 km (0.1 R)
• M22: 5,450,898 km (0.069 R)
• M23: 6,362,248 km (0.101 R)
• M24: 7,018,235 km (0.089 R)
• M25: 7,868,250 km (0.096 R)
• M26: 7,972,519 km (0.044 R)
• M27: 8,393,937 km (0.092 R)
• M28: 8,643,167 km (0.046 R)
• M29: 9,331,915 km (0.117 R)
• M30: 9,775,922 km (0.095 R)
• M31: 10,151,412 km (0.078 R)
• M32: 10,264,957 km (0.05 R)
• M33: 11,032,693 km (0.102 R)
• M34: 11,620,613 km (0.027 R)
• M35: 12,018,244 km (0.044 R)
• M36: 13,031,919 km (0.068 R)
• M37: 13,403,520 km (0.107 R)
• M38: 14,114,858 km (0.045 R)
• M39: 15,574,485 km (0.094 R)
• M40: 15,837,029 km (0.092 R)
• M41: 15,968,825 km (0.07 R)
• M42: 17,989,593 km (0.095 R)
• M43: 18,311,228 km (0.119 R)
• M44: 18,495,832 km (0.106 R)
• M45: 18,727,409 km (0.098 R)
• M46: 18,960,034 km (0.087 R)
• M47: 19,193,556 km (0.077 R)
• M48: 19,287,205 km (0.098 R)
• M49: 19,427,976 km (0.048 R)
• M50: 20,089,648 km (0.104 R)
• M51: 20,471,122 km (0.105 R)
• M52: 20,758,799 km (0.111 R)
• M53: 20,951,331 km (0.075 R)
• M54: 21,532,370 km (0.108 R)
• M55: 21,776,064 km (0.074 R)
• M56: 22,562,052 km (0.107 R)
• M57: 23,257,383 km (0.112 R)
• M58: 24,010,159 km (0.056 R)
• M59: 24,822,027 km (0.09 R)
• M60: 25,282,639 km (0.101 R)
• M61: 25,539,648 km (0.085 R)
• M62: 26,420,330 km (0.045 R)
• M63: 26,733,588 km (0.072 R)
• M64: 26,995,534 km (0.031 R)
• M65: 28,105,102 km (0.073 R)
• M66: 29,067,913 km (0.105 R)
• M67: 29,175,474 km (0.119 R)
• M68: 29,283,334 km (0.066 R)
• M69: 30,696,585 km (0.096 R)
• M70: 32,243,128 km (0.089 R)
• M71: 32,466,179 km (0.095 R)
• M72: 33,702,007 km (0.104 R)
• M73: 34,155,139 km (0.084 R)
• M74: 34,610,365 km (0.118 R)
• M75: 35,010,390 km (0.042 R)
• M76: 35,757,182 km (0.113 R)
• M77: 37,325,118 km (0.106 R)
• M78: 37,970,184 km (0.054 R)
• M79: 38,441,866 km (0.089 R)
• M80: 38,915,343 km (0.096 R)
• M81: 39,808,293 km (0.086 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.26 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 442.1

Radius: 3.1

Gravity: 46 G

Time & Orbit

Eccentricity (e): 0.116

Orbit Range: 9.07 AU - 11.45 AU

Year: 21220 Days

Day: 15.2 Hours

Environment

Temp: -221 °C

Axial Tilt: 13.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 68,401,817 km

• M1: 117,434 km (0.1 R)
• M2: 1,224,159 km (0.063 R)
• M3: 1,527,843 km (0.078 R)
• M4: 1,762,712 km (0.104 R)
• M5: 1,946,268 km (0.05 R)
• M6: 2,103,795 km (0.104 R)
• M7: 2,331,333 km (0.12 R)
• M8: 2,498,733 km (0.098 R)
• M9: 2,566,800 km (0.119 R)
• M10: 2,951,716 km (0.086 R)
• M11: 3,543,226 km (0.054 R)
• M12: 3,970,477 km (0.087 R)
• M13: 4,372,895 km (0.087 R)
• M14: 4,413,736 km (0.07 R)
• M15: 5,000,458 km (0.115 R)
• M16: 5,790,036 km (0.098 R)
• M17: 6,107,333 km (0.055 R)
• M18: 6,430,315 km (0.118 R)
• M19: 6,758,981 km (0.108 R)
• M20: 6,806,254 km (0.089 R)
• M21: 7,286,164 km (0.053 R)
• M22: 7,432,321 km (0.047 R)
• M23: 9,101,834 km (0.054 R)
• M24: 9,154,043 km (0.085 R)
• M25: 11,780,982 km (0.079 R)
• M26: 12,704,749 km (0.036 R)
• M27: 12,763,242 km (0.098 R)
• M28: 13,175,384 km (0.105 R)
• M29: 14,254,732 km (0.049 R)
• M30: 14,620,798 km (0.107 R)
• M31: 15,175,657 km (0.095 R)
• M32: 15,989,320 km (0.093 R)
• M33: 17,854,655 km (0.068 R)
• M34: 17,985,853 km (0.049 R)
• M35: 19,382,199 km (0.076 R)
• M36: 22,489,497 km (0.078 R)
• M37: 22,915,252 km (0.082 R)
• M38: 23,991,459 km (0.077 R)
• M39: 24,791,060 km (0.118 R)
• M40: 24,864,064 km (0.109 R)
• M41: 24,937,367 km (0.103 R)
• M42: 25,378,082 km (0.079 R)
• M43: 26,715,337 km (0.047 R)
• M44: 27,090,978 km (0.118 R)
• M45: 27,771,349 km (0.102 R)
• M46: 28,764,080 km (0.101 R)
• M47: 29,690,540 km (0.071 R)
• M48: 29,768,331 km (0.073 R)
• M49: 30,783,951 km (0.117 R)
• M50: 31,256,530 km (0.069 R)
• M51: 31,335,518 km (0.098 R)
• M52: 31,652,217 km (0.083 R)
• M53: 32,368,491 km (0.044 R)
• M54: 33,170,785 km (0.036 R)
• M55: 33,332,051 km (0.12 R)
• M56: 33,574,400 km (0.038 R)
• M57: 34,304,886 km (0.104 R)
• M58: 34,712,840 km (0.117 R)
• M59: 38,203,706 km (0.092 R)
• M60: 38,457,274 km (0.073 R)
• M61: 38,966,206 km (0.074 R)
• M62: 41,023,775 km (0.06 R)
• M63: 43,380,391 km (0.12 R)
• M64: 43,909,967 km (0.08 R)
• M65: 44,530,649 km (0.077 R)
• M66: 45,960,056 km (0.112 R)
• M67: 46,409,747 km (0.096 R)
• M68: 46,499,955 km (0.117 R)
• M69: 47,223,111 km (0.044 R)
• M70: 48,680,494 km (0.116 R)
• M71: 50,708,293 km (0.089 R)
• M72: 52,106,734 km (0.103 R)
• M73: 55,897,095 km (0.068 R)
• M74: 58,505,483 km (0.075 R)
• M75: 60,069,679 km (0.091 R)
• M76: 60,266,250 km (0.113 R)
• M77: 60,364,536 km (0.038 R)
• M78: 61,054,332 km (0.096 R)
• M79: 61,350,835 km (0.12 R)
• M80: 63,139,427 km (0.104 R)
• M81: 65,348,688 km (0.088 R)
• M82: 66,361,167 km (0.103 R)
• M83: 67,992,083 km (0.099 R)

Kuiper Belt

Range: 30 - 53 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 267 - 12,988 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit