🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.96 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 333.2

Radius: 8.7

Gravity: 4.4 G

Time & Orbit

Eccentricity (e): 0.127

Orbit Range: 0.84 AU - 1.08 AU

Year: 627 Days

Day: 11.9 Hours

Environment

Temp: -176 °C

Axial Tilt: 15.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 83,393,367 km

• M1: 233,073 km (0.05 R)
• M2: 312,660 km (0.078 R)
• M3: 382,073 km (0.039 R)
• M4: 482,154 km (0.061 R)
• M5: 607,517 km (0.115 R)
• M6: 674,537 km (0.107 R)
• M7: 786,586 km (0.088 R)
• M8: 1,006,494 km (0.071 R)
• M9: 1,068,278 km (0.079 R)
• M10: 1,126,472 km (0.029 R)
• M11: 1,231,041 km (0.045 R)
• M12: 1,323,193 km (0.109 R)
• M13: 1,391,410 km (0.069 R)
• M14: 1,449,903 km (0.097 R)
• M15: 1,653,356 km (0.087 R)
• M16: 1,755,681 km (0.032 R)
• M17: 1,960,929 km (0.063 R)
• M18: 2,033,035 km (0.119 R)
• M19: 2,106,188 km (0.085 R)
• M20: 2,161,540 km (0.074 R)
• M21: 2,242,472 km (0.093 R)
• M22: 2,299,170 km (0.11 R)
• M23: 2,356,316 km (0.067 R)
• M24: 2,471,955 km (0.114 R)
• M25: 2,530,598 km (0.05 R)
• M26: 2,742,727 km (0.091 R)
• M27: 2,830,541 km (0.061 R)
• M28: 2,898,758 km (0.06 R)
• M29: 2,988,217 km (0.086 R)
• M30: 3,113,730 km (0.058 R)
• M31: 3,248,219 km (0.113 R)
• M32: 3,326,907 km (0.083 R)
• M33: 3,413,524 km (0.104 R)
• M34: 3,500,889 km (0.106 R)
• M35: 3,611,143 km (0.11 R)
• M36: 3,797,542 km (0.104 R)
• M37: 3,971,823 km (0.029 R)
• M38: 4,117,831 km (0.118 R)
• M39: 4,265,484 km (0.067 R)
• M40: 4,399,225 km (0.12 R)
• M41: 4,590,411 km (0.063 R)
• M42: 4,687,051 km (0.057 R)
• M43: 4,857,742 km (0.067 R)
• M44: 4,948,099 km (0.049 R)
• M45: 5,030,528 km (0.105 R)
• M46: 5,138,537 km (0.093 R)
• M47: 5,238,917 km (0.098 R)
• M48: 5,458,677 km (0.117 R)
• M49: 5,586,882 km (0.051 R)
• M50: 5,715,985 km (0.049 R)
• M51: 5,802,752 km (0.05 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 837

Radius: 12.5

Gravity: 5.36 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 1.03 AU - 1.17 AU

Year: 769 Days

Day: 7.1 Hours

Environment

Temp: -184 °C

Axial Tilt: 45.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 83,393,367 km

• M1: 158,723 km (0.094 R)
• M2: 245,341 km (0.039 R)
• M3: 413,937 km (0.027 R)
• M4: 524,939 km (0.05 R)
• M5: 607,517 km (0.084 R)
• M6: 700,866 km (0.051 R)
• M7: 892,501 km (0.092 R)
• M8: 988,992 km (0.092 R)
• M9: 1,160,730 km (0.052 R)
• M10: 1,240,466 km (0.096 R)
• M11: 1,370,765 km (0.112 R)
• M12: 1,476,980 km (0.104 R)
• M13: 1,571,376 km (0.102 R)
• M14: 1,653,056 km (0.118 R)
• M15: 1,774,380 km (0.114 R)
• M16: 1,867,580 km (0.102 R)
• M17: 2,002,367 km (0.055 R)
• M18: 2,107,684 km (0.099 R)
• M19: 2,231,701 km (0.096 R)
• M20: 2,392,369 km (0.099 R)
• M21: 2,574,430 km (0.064 R)
• M22: 2,716,398 km (0.114 R)
• M23: 2,824,557 km (0.091 R)
• M24: 2,998,989 km (0.068 R)
• M25: 3,176,860 km (0.085 R)
• M26: 3,465,135 km (0.09 R)
• M27: 3,543,525 km (0.095 R)
• M28: 3,852,744 km (0.091 R)
• M29: 4,160,466 km (0.087 R)
• M30: 4,519,052 km (0.113 R)
• M31: 4,799,997 km (0.112 R)
• M32: 4,997,915 km (0.117 R)
• M33: 5,120,286 km (0.086 R)
• M34: 5,254,775 km (0.038 R)
• M35: 5,345,282 km (0.049 R)
• M36: 5,481,715 km (0.055 R)
• M37: 5,677,239 km (0.102 R)
• M38: 5,921,981 km (0.108 R)
• M39: 6,004,260 km (0.082 R)
• M40: 6,289,543 km (0.115 R)
• M41: 6,421,788 km (0.117 R)
• M42: 7,360,963 km (0.085 R)
• M43: 7,576,833 km (0.102 R)
• M44: 7,756,350 km (0.055 R)
• M45: 7,911,334 km (0.115 R)
• M46: 8,054,200 km (0.106 R)
• M47: 8,408,747 km (0.034 R)
• M48: 8,701,360 km (0.103 R)
• M49: 8,902,868 km (0.112 R)
• M50: 9,065,182 km (0.092 R)
• M51: 9,201,316 km (0.101 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.53 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 415.4

Radius: 13.7

Gravity: 2.21 G

Time & Orbit

Eccentricity (e): 0.091

Orbit Range: 2.3 AU - 2.76 AU

Year: 2684 Days

Day: 6.4 Hours

Environment

Temp: -198 °C

Axial Tilt: 17 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (62)

Outer Limit: 83,393,367 km

• M1: 187,147 km (0.08 R)
• M2: 284,535 km (0.066 R)
• M3: 422,165 km (0.048 R)
• M4: 569,968 km (0.109 R)
• M5: 659,577 km (0.087 R)
• M6: 747,092 km (0.09 R)
• M7: 891,155 km (0.1 R)
• M8: 980,913 km (0.102 R)
• M9: 1,141,133 km (0.046 R)
• M10: 1,259,913 km (0.111 R)
• M11: 1,383,182 km (0.086 R)
• M12: 1,620,295 km (0.112 R)
• M13: 1,755,531 km (0.104 R)
• M14: 2,098,260 km (0.111 R)
• M15: 2,209,112 km (0.109 R)
• M16: 2,501,576 km (0.097 R)
• M17: 2,593,279 km (0.071 R)
• M18: 3,026,515 km (0.093 R)
• M19: 3,152,626 km (0.039 R)
• M20: 3,424,744 km (0.088 R)
• M21: 3,645,102 km (0.111 R)
• M22: 3,734,561 km (0.1 R)
• M23: 4,084,471 km (0.049 R)
• M24: 4,413,436 km (0.11 R)
• M25: 4,799,997 km (0.093 R)
• M26: 4,898,283 km (0.112 R)
• M27: 5,180,873 km (0.056 R)
• M28: 5,349,470 km (0.105 R)
• M29: 5,485,754 km (0.071 R)
• M30: 5,709,852 km (0.057 R)
• M31: 5,866,630 km (0.061 R)
• M32: 5,954,444 km (0.059 R)
• M33: 6,238,231 km (0.104 R)
• M34: 6,363,893 km (0.089 R)
• M35: 6,635,862 km (0.109 R)
• M36: 7,551,102 km (0.068 R)
• M37: 7,646,845 km (0.118 R)
• M38: 7,994,510 km (0.11 R)
• M39: 9,272,674 km (0.117 R)
• M40: 9,872,711 km (0.112 R)
• M41: 10,019,317 km (0.115 R)
• M42: 10,230,250 km (0.116 R)
• M43: 10,378,801 km (0.075 R)
• M44: 10,506,707 km (0.058 R)
• M45: 10,742,473 km (0.098 R)
• M46: 10,828,642 km (0.112 R)
• M47: 11,482,385 km (0.082 R)
• M48: 12,396,577 km (0.106 R)
• M49: 12,509,673 km (0.032 R)
• M50: 12,828,317 km (0.095 R)
• M51: 12,965,647 km (0.063 R)
• M52: 13,172,541 km (0.068 R)
• M53: 13,264,843 km (0.112 R)
• M54: 14,152,707 km (0.108 R)
• M55: 14,843,250 km (0.087 R)
• M56: 14,963,377 km (0.072 R)
• M57: 15,593,484 km (0.083 R)
• M58: 15,789,158 km (0.117 R)
• M59: 16,034,797 km (0.038 R)
• M60: 16,629,748 km (0.104 R)
• M61: 16,729,530 km (0.11 R)
• M62: 16,854,743 km (0.041 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.16 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 725

Radius: 9.5

Gravity: 8.03 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 2.79 AU - 3.53 AU

Year: 3746 Days

Day: 6.7 Hours

Environment

Temp: -208 °C

Axial Tilt: 38.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 83,393,367 km

• M1: 160,070 km (0.034 R)
• M2: 242,947 km (0.083 R)
• M3: 320,289 km (0.103 R)
• M4: 965,505 km (0.114 R)
• M5: 1,052,571 km (0.089 R)
• M6: 1,399,338 km (0.069 R)
• M7: 1,470,098 km (0.066 R)
• M8: 1,542,204 km (0.098 R)
• M9: 1,644,978 km (0.088 R)
• M10: 1,780,813 km (0.083 R)
• M11: 1,936,096 km (0.08 R)
• M12: 2,514,890 km (0.065 R)
• M13: 2,584,303 km (0.097 R)
• M14: 3,219,645 km (0.092 R)
• M15: 3,487,126 km (0.096 R)
• M16: 3,741,892 km (0.104 R)
• M17: 4,820,941 km (0.066 R)
• M18: 5,017,064 km (0.119 R)
• M19: 5,171,449 km (0.095 R)
• M20: 5,304,890 km (0.077 R)
• M21: 5,804,547 km (0.103 R)
• M22: 5,943,374 km (0.103 R)
• M23: 6,013,236 km (0.118 R)
• M24: 6,106,735 km (0.093 R)
• M25: 6,271,741 km (0.052 R)
• M26: 6,509,901 km (0.12 R)
• M27: 6,630,178 km (0.115 R)
• M28: 6,848,441 km (0.111 R)
• M29: 7,316,981 km (0.09 R)
• M30: 7,719,699 km (0.098 R)
• M31: 7,898,169 km (0.11 R)
• M32: 8,181,358 km (0.109 R)
• M33: 8,363,269 km (0.101 R)
• M34: 9,374,401 km (0.12 R)
• M35: 9,729,098 km (0.099 R)
• M36: 9,866,728 km (0.071 R)
• M37: 10,199,732 km (0.111 R)
• M38: 10,367,581 km (0.106 R)
• M39: 10,451,954 km (0.09 R)
• M40: 10,536,328 km (0.093 R)
• M41: 10,734,545 km (0.12 R)
• M42: 10,905,236 km (0.088 R)
• M43: 11,076,974 km (0.103 R)
• M44: 11,422,994 km (0.061 R)
• M45: 11,626,447 km (0.091 R)
• M46: 11,948,681 km (0.063 R)
• M47: 12,096,185 km (0.072 R)
• M48: 12,902,816 km (0.114 R)
• M49: 13,054,209 km (0.12 R)
• M50: 13,145,165 km (0.069 R)
• M51: 13,266,938 km (0.058 R)
• M52: 13,419,677 km (0.099 R)
• M53: 13,634,500 km (0.051 R)
• M54: 13,881,336 km (0.099 R)
• M55: 13,974,236 km (0.101 R)
• M56: 14,536,425 km (0.112 R)
• M57: 14,946,922 km (0.082 R)
• M58: 15,010,501 km (0.11 R)
• M59: 15,169,673 km (0.101 R)
• M60: 15,233,402 km (0.046 R)
• M61: 15,457,499 km (0.055 R)
• M62: 15,747,270 km (0.087 R)
• M63: 16,397,572 km (0.086 R)
• M64: 16,693,028 km (0.076 R)
• M65: 16,990,279 km (0.088 R)
• M66: 17,422,766 km (0.077 R)
• M67: 17,522,997 km (0.11 R)
• M68: 18,230,595 km (0.054 R)
• M69: 18,570,930 km (0.06 R)
• M70: 18,776,029 km (0.058 R)
• M71: 19,292,291 km (0.064 R)
• M72: 19,917,909 km (0.095 R)
• M73: 19,987,772 km (0.104 R)
• M74: 20,197,957 km (0.117 R)
• M75: 20,585,415 km (0.052 R)
• M76: 21,046,326 km (0.059 R)
• M77: 21,260,251 km (0.102 R)
• M78: 21,439,170 km (0.061 R)
• M79: 22,449,704 km (0.114 R)
• M80: 23,107,635 km (0.103 R)
• M81: 23,254,690 km (0.092 R)
• M82: 23,845,901 km (0.09 R)
• M83: 24,592,095 km (0.114 R)
• M84: 25,081,130 km (0.098 R)
• M85: 25,232,374 km (0.082 R)

Planet 5 - Ice Giant

Semi-Major Axis: 5.89 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 236.6

Radius: 4.5

Gravity: 11.68 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 5.7 AU - 6.08 AU

Year: 9532 Days

Day: 23.8 Hours

Environment

Temp: -218 °C

Axial Tilt: 9.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 83,393,367 km

• M1: 104,120 km (0.065 R)
• M2: 147,952 km (0.106 R)
• M3: 594,801 km (0.048 R)
• M4: 876,045 km (0.099 R)
• M5: 1,115,252 km (0.053 R)
• M6: 1,210,097 km (0.104 R)
• M7: 1,291,179 km (0.041 R)
• M8: 1,424,621 km (0.065 R)
• M9: 1,796,072 km (0.094 R)
• M10: 2,002,068 km (0.074 R)
• M11: 2,059,663 km (0.082 R)
• M12: 2,235,441 km (0.113 R)
• M13: 2,315,177 km (0.082 R)
• M14: 2,436,501 km (0.108 R)
• M15: 2,497,985 km (0.098 R)
• M16: 2,539,274 km (0.102 R)
• M17: 3,030,254 km (0.081 R)
• M18: 3,074,236 km (0.117 R)
• M19: 3,118,517 km (0.098 R)
• M20: 3,549,658 km (0.06 R)
• M21: 3,807,864 km (0.1 R)
• M22: 4,023,584 km (0.104 R)
• M23: 4,072,054 km (0.111 R)
• M24: 4,120,823 km (0.066 R)
• M25: 4,517,108 km (0.08 R)
• M26: 4,668,950 km (0.098 R)
• M27: 5,029,630 km (0.065 R)
• M28: 5,213,336 km (0.079 R)
• M29: 5,266,294 km (0.117 R)
• M30: 5,641,485 km (0.076 R)
• M31: 5,804,996 km (0.079 R)
• M32: 5,997,678 km (0.079 R)
• M33: 6,276,678 km (0.094 R)
• M34: 6,588,290 km (0.081 R)
• M35: 6,905,139 km (0.051 R)
• M36: 7,256,245 km (0.103 R)
• M37: 7,434,117 km (0.083 R)
• M38: 7,583,266 km (0.1 R)
• M39: 7,763,681 km (0.048 R)
• M40: 7,824,118 km (0.095 R)
• M41: 7,884,855 km (0.104 R)
• M42: 7,945,592 km (0.09 R)
• M43: 7,975,960 km (0.064 R)
• M44: 9,065,781 km (0.088 R)
• M45: 10,267,500 km (0.07 R)
• M46: 10,567,444 km (0.053 R)
• M47: 10,735,143 km (0.095 R)
• M48: 10,903,890 km (0.087 R)
• M49: 11,449,623 km (0.066 R)
• M50: 11,518,438 km (0.101 R)
• M51: 11,552,995 km (0.067 R)
• M52: 11,656,666 km (0.102 R)
• M53: 11,760,487 km (0.088 R)
• M54: 11,830,050 km (0.085 R)
• M55: 13,356,098 km (0.071 R)
• M56: 13,683,268 km (0.111 R)
• M57: 13,829,575 km (0.081 R)
• M58: 13,939,679 km (0.119 R)
• M59: 15,131,376 km (0.054 R)
• M60: 15,320,617 km (0.112 R)
• M61: 15,586,752 km (0.092 R)
• M62: 15,816,085 km (0.109 R)
• M63: 15,854,382 km (0.109 R)
• M64: 15,969,573 km (0.033 R)
• M65: 16,200,701 km (0.115 R)
• M66: 16,822,580 km (0.116 R)
• M67: 17,057,897 km (0.11 R)
• M68: 17,215,274 km (0.103 R)
• M69: 18,009,639 km (0.109 R)
• M70: 18,129,766 km (0.083 R)
• M71: 18,330,676 km (0.117 R)
• M72: 18,734,740 km (0.074 R)
• M73: 19,592,534 km (0.089 R)
• M74: 19,633,823 km (0.106 R)
• M75: 21,092,851 km (0.098 R)
• M76: 21,942,268 km (0.073 R)
• M77: 23,237,037 km (0.12 R)
• M78: 23,937,754 km (0.057 R)
• M79: 24,290,655 km (0.059 R)
• M80: 24,512,060 km (0.071 R)
• M81: 24,556,490 km (0.093 R)
• M82: 24,956,964 km (0.11 R)
• M83: 25,809,672 km (0.056 R)
• M84: 26,035,714 km (0.077 R)
• M85: 27,175,351 km (0.099 R)
• M86: 27,451,359 km (0.079 R)
• M87: 27,497,435 km (0.104 R)
• M88: 27,589,587 km (0.083 R)
• M89: 27,959,692 km (0.109 R)
• M90: 29,314,600 km (0.093 R)
• M91: 29,503,094 km (0.038 R)
• M92: 30,595,158 km (0.107 R)
• M93: 30,642,880 km (0.072 R)

Planet 6 - Ice Giant

Semi-Major Axis: 10.28 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 746.7

Radius: 5.6

Gravity: 23.81 G

Time & Orbit

Eccentricity (e): 0.036

Orbit Range: 9.91 AU - 10.65 AU

Year: 21980 Days

Day: 18.9 Hours

Environment

Temp: -243 °C

Axial Tilt: 43.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 83,393,367 km

• M1: 165,754 km (0.103 R)
• M2: 341,532 km (0.097 R)
• M3: 662,719 km (0.069 R)
• M4: 891,753 km (0.082 R)
• M5: 973,433 km (0.095 R)
• M6: 2,098,260 km (0.105 R)
• M7: 2,548,101 km (0.113 R)
• M8: 2,704,580 km (0.117 R)
• M9: 3,664,101 km (0.115 R)
• M10: 4,387,706 km (0.117 R)
• M11: 5,007,490 km (0.032 R)
• M12: 5,105,177 km (0.084 R)
• M13: 6,379,900 km (0.097 R)
• M14: 6,539,222 km (0.071 R)
• M15: 7,803,623 km (0.114 R)
• M16: 8,031,012 km (0.115 R)
• M17: 9,989,248 km (0.12 R)
• M18: 10,736,041 km (0.069 R)
• M19: 11,180,047 km (0.118 R)
• M20: 12,020,339 km (0.085 R)
• M21: 12,349,005 km (0.102 R)
• M22: 13,015,015 km (0.058 R)
• M23: 13,217,121 km (0.102 R)
• M24: 14,173,949 km (0.12 R)
• M25: 14,381,890 km (0.051 R)
• M26: 14,941,237 km (0.08 R)
• M27: 16,298,090 km (0.099 R)
• M28: 19,819,623 km (0.112 R)
• M29: 20,598,131 km (0.11 R)
• M30: 21,545,534 km (0.03 R)
• M31: 21,864,477 km (0.08 R)
• M32: 23,074,424 km (0.072 R)
• M33: 24,223,186 km (0.099 R)
• M34: 24,721,198 km (0.111 R)
• M35: 25,306,425 km (0.112 R)
• M36: 25,727,243 km (0.098 R)
• M37: 26,235,278 km (0.117 R)
• M38: 27,175,351 km (0.04 R)
• M39: 29,176,222 km (0.083 R)
• M40: 30,238,816 km (0.058 R)
• M41: 30,864,584 km (0.087 R)
• M42: 31,675,404 km (0.042 R)
• M43: 34,242,205 km (0.054 R)
• M44: 34,614,255 km (0.094 R)
• M45: 35,927,275 km (0.079 R)
• M46: 37,735,016 km (0.088 R)
• M47: 37,830,908 km (0.064 R)
• M48: 38,023,141 km (0.078 R)
• M49: 38,215,524 km (0.117 R)
• M50: 39,280,063 km (0.089 R)
• M51: 39,962,528 km (0.098 R)
• M52: 41,537,195 km (0.112 R)
• M53: 44,138,852 km (0.053 R)
• M54: 44,543,813 km (0.04 R)
• M55: 44,746,668 km (0.088 R)
• M56: 44,848,245 km (0.054 R)
• M57: 46,073,152 km (0.081 R)
• M58: 46,278,400 km (0.088 R)
• M59: 46,689,795 km (0.109 R)
• M60: 48,347,339 km (0.12 R)
• M61: 48,869,136 km (0.106 R)
• M62: 49,183,292 km (0.032 R)
• M63: 49,813,398 km (0.117 R)
• M64: 50,234,965 km (0.117 R)
• M65: 53,218,695 km (0.06 R)
• M66: 53,541,826 km (0.102 R)
• M67: 53,757,546 km (0.119 R)
• M68: 54,081,725 km (0.044 R)
• M69: 54,732,027 km (0.115 R)
• M70: 55,603,135 km (0.055 R)
• M71: 59,467,846 km (0.045 R)
• M72: 59,914,994 km (0.073 R)
• M73: 61,827,902 km (0.119 R)
• M74: 61,940,998 km (0.083 R)
• M75: 63,989,292 km (0.106 R)
• M76: 65,136,858 km (0.118 R)
• M77: 68,385,974 km (0.042 R)
• M78: 68,971,799 km (0.096 R)
• M79: 70,384,302 km (0.101 R)
• M80: 70,620,667 km (0.069 R)
• M81: 71,331,257 km (0.054 R)
• M82: 71,449,888 km (0.048 R)
• M83: 72,163,320 km (0.062 R)
• M84: 75,161,261 km (0.112 R)
• M85: 75,523,737 km (0.083 R)
• M86: 76,129,010 km (0.12 R)
• M87: 76,614,605 km (0.052 R)
• M88: 77,832,780 km (0.116 R)
• M89: 77,955,002 km (0.087 R)
• M90: 78,444,336 km (0.11 R)
• M91: 78,934,568 km (0.093 R)
• M92: 80,288,280 km (0.115 R)
• M93: 80,411,847 km (0.047 R)
• M94: 80,906,268 km (0.097 R)
• M95: 81,029,986 km (0.102 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: 339 - 11,765 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit