Star System Generated (Seed: 1766354357)
Star Details
Spectral Class: M8V
Temperature: 2,617 K
Mass: 0.28 sol
Luminosity: 0.01 lux
Habitable Zone (HZ)
Inner Boundary: 0.1 AU
Outer Boundary: 0.14 AU
Physical Limits
Snow Line: 0.48 AU
Max System Radius: 10.6 AU
Planetary System (6 Planets)
Planet 1 - Gas Giant
Semi-Major Axis: 0.77 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 332.5
Radius: 10.3
Gravity: 3.13 G
Time & Orbit
Eccentricity (e): 0.159
Orbit Range: 0.65 AU - 0.89 AU
Year: 466 Days
Day: 11.9 Hours
Environment
Temp: -172 °C
Axial Tilt: 19.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (43)
Outer Limit: 69,989,312 km
- M1: 135,087 km (0.113 R)
- M2: 210,484 km (0.092 R)
- M3: 287,527 km (0.106 R)
- M4: 438,023 km (0.119 R)
- M5: 537,356 km (0.105 R)
- M6: 642,074 km (0.038 R)
- M7: 715,078 km (0.103 R)
- M8: 787,483 km (0.059 R)
- M9: 877,990 km (0.098 R)
- M10: 1,008,738 km (0.071 R)
- M11: 1,120,638 km (0.078 R)
- M12: 1,210,845 km (0.066 R)
- M13: 1,276,818 km (0.107 R)
- M14: 1,407,866 km (0.092 R)
- M15: 1,477,578 km (0.109 R)
- M16: 1,567,636 km (0.101 R)
- M17: 1,708,707 km (0.082 R)
- M18: 1,818,512 km (0.094 R)
- M19: 1,894,956 km (0.081 R)
- M20: 1,972,298 km (0.106 R)
- M21: 2,040,365 km (0.098 R)
- M22: 2,211,206 km (0.112 R)
- M23: 2,342,553 km (0.06 R)
- M24: 2,425,879 km (0.098 R)
- M25: 2,532,991 km (0.096 R)
- M26: 2,705,477 km (0.116 R)
- M27: 2,959,495 km (0.054 R)
- M28: 3,025,767 km (0.115 R)
- M29: 3,092,487 km (0.094 R)
- M30: 3,165,790 km (0.052 R)
- M31: 3,289,508 km (0.118 R)
- M32: 3,395,872 km (0.112 R)
- M33: 3,503,433 km (0.096 R)
- M34: 3,586,459 km (0.098 R)
- M35: 3,715,562 km (0.074 R)
- M36: 3,806,817 km (0.115 R)
- M37: 3,872,341 km (0.078 R)
- M38: 3,991,570 km (0.086 R)
- M39: 4,220,006 km (0.06 R)
- M40: 4,328,914 km (0.111 R)
- M41: 4,438,868 km (0.044 R)
- M42: 4,508,132 km (0.104 R)
- M43: 4,866,568 km (0.109 R)
Planet 2 - Gas Giant
Semi-Major Axis: 2.35 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 921.4
Radius: 12
Gravity: 6.4 G
Time & Orbit
Eccentricity (e): 0.103
Orbit Range: 2.11 AU - 2.59 AU
Year: 2487 Days
Day: 10.3 Hours
Environment
Temp: -200 °C
Axial Tilt: 11.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (71)
Outer Limit: 69,989,312 km
- M1: 156,629 km (0.03 R)
- M2: 246,537 km (0.089 R)
- M3: 360,980 km (0.107 R)
- M4: 493,523 km (0.11 R)
- M5: 575,952 km (0.093 R)
- M6: 719,566 km (0.116 R)
- M7: 816,056 km (0.106 R)
- M8: 927,956 km (0.068 R)
- M9: 1,249,142 km (0.09 R)
- M10: 1,441,525 km (0.058 R)
- M11: 1,528,890 km (0.104 R)
- M12: 1,829,133 km (0.081 R)
- M13: 2,091,528 km (0.039 R)
- M14: 2,205,821 km (0.086 R)
- M15: 2,637,710 km (0.09 R)
- M16: 2,808,550 km (0.1 R)
- M17: 3,112,384 km (0.043 R)
- M18: 3,276,792 km (0.056 R)
- M19: 3,359,968 km (0.077 R)
- M20: 3,444,042 km (0.059 R)
- M21: 3,545,619 km (0.116 R)
- M22: 3,682,950 km (0.108 R)
- M23: 3,909,740 km (0.111 R)
- M24: 3,998,153 km (0.05 R)
- M25: 4,285,979 km (0.093 R)
- M26: 5,054,014 km (0.027 R)
- M27: 5,404,672 km (0.041 R)
- M28: 5,642,981 km (0.057 R)
- M29: 5,884,731 km (0.102 R)
- M30: 6,006,803 km (0.097 R)
- M31: 6,150,417 km (0.039 R)
- M32: 6,316,022 km (0.029 R)
- M33: 6,420,292 km (0.118 R)
- M34: 7,405,992 km (0.09 R)
- M35: 7,538,087 km (0.094 R)
- M36: 7,984,038 km (0.065 R)
- M37: 8,187,491 km (0.082 R)
- M38: 8,346,963 km (0.105 R)
- M39: 8,808,323 km (0.082 R)
- M40: 8,925,009 km (0.078 R)
- M41: 9,183,364 km (0.053 R)
- M42: 9,277,910 km (0.114 R)
- M43: 9,396,691 km (0.056 R)
- M44: 9,491,985 km (0.061 R)
- M45: 9,587,728 km (0.1 R)
- M46: 9,852,366 km (0.046 R)
- M47: 10,119,548 km (0.112 R)
- M48: 10,438,341 km (0.101 R)
- M49: 10,561,909 km (0.118 R)
- M50: 10,885,339 km (0.114 R)
- M51: 10,960,438 km (0.111 R)
- M52: 11,618,668 km (0.12 R)
- M53: 11,798,036 km (0.113 R)
- M54: 12,263,585 km (0.057 R)
- M55: 12,420,214 km (0.083 R)
- M56: 12,682,608 km (0.038 R)
- M57: 13,053,013 km (0.113 R)
- M58: 13,319,746 km (0.043 R)
- M59: 13,453,785 km (0.108 R)
- M60: 13,561,496 km (0.116 R)
- M61: 15,153,516 km (0.112 R)
- M62: 15,631,182 km (0.084 R)
- M63: 16,486,433 km (0.073 R)
- M64: 18,093,713 km (0.102 R)
- M65: 18,630,470 km (0.084 R)
- M66: 18,991,300 km (0.089 R)
- M67: 19,081,807 km (0.107 R)
- M68: 19,750,360 km (0.104 R)
- M69: 20,056,886 km (0.116 R)
- M70: 20,457,509 km (0.086 R)
- M71: 20,860,974 km (0.113 R)
Planet 3 - Gas Giant
Semi-Major Axis: 2.47 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 257.3
Radius: 8.9
Gravity: 3.25 G
Time & Orbit
Eccentricity (e): 0.069
Orbit Range: 2.3 AU - 2.64 AU
Year: 2680 Days
Day: 8.2 Hours
Environment
Temp: -209 °C
Axial Tilt: 9.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (67)
Outer Limit: 69,989,312 km
- M1: 177,573 km (0.104 R)
- M2: 242,349 km (0.113 R)
- M3: 391,946 km (0.105 R)
- M4: 476,768 km (0.097 R)
- M5: 616,942 km (0.109 R)
- M6: 857,794 km (0.066 R)
- M7: 955,930 km (0.098 R)
- M8: 1,075,309 km (0.105 R)
- M9: 1,137,093 km (0.089 R)
- M10: 1,227,301 km (0.119 R)
- M11: 1,329,476 km (0.113 R)
- M12: 1,663,528 km (0.076 R)
- M13: 1,777,223 km (0.048 R)
- M14: 1,872,217 km (0.076 R)
- M15: 1,990,848 km (0.107 R)
- M16: 2,111,873 km (0.059 R)
- M17: 2,349,734 km (0.118 R)
- M18: 2,442,784 km (0.104 R)
- M19: 2,536,881 km (0.119 R)
- M20: 2,901,152 km (0.108 R)
- M21: 3,346,953 km (0.096 R)
- M22: 3,451,971 km (0.09 R)
- M23: 3,678,612 km (0.096 R)
- M24: 3,787,070 km (0.072 R)
- M25: 3,979,303 km (0.116 R)
- M26: 4,048,717 km (0.042 R)
- M27: 4,104,517 km (0.117 R)
- M28: 4,245,288 km (0.074 R)
- M29: 4,474,024 km (0.042 R)
- M30: 4,633,495 km (0.073 R)
- M31: 5,018,111 km (0.062 R)
- M32: 5,093,209 km (0.114 R)
- M33: 5,183,865 km (0.107 R)
- M34: 5,614,258 km (0.084 R)
- M35: 5,802,153 km (0.103 R)
- M36: 5,928,713 km (0.11 R)
- M37: 6,168,369 km (0.103 R)
- M38: 6,394,860 km (0.095 R)
- M39: 6,558,371 km (0.088 R)
- M40: 6,640,649 km (0.086 R)
- M41: 6,756,438 km (0.116 R)
- M42: 6,822,860 km (0.081 R)
- M43: 7,226,176 km (0.117 R)
- M44: 7,328,201 km (0.044 R)
- M45: 7,602,713 km (0.052 R)
- M46: 7,793,451 km (0.116 R)
- M47: 7,950,678 km (0.095 R)
- M48: 8,055,995 km (0.085 R)
- M49: 9,025,389 km (0.112 R)
- M50: 9,098,692 km (0.055 R)
- M51: 9,227,346 km (0.109 R)
- M52: 10,107,131 km (0.077 R)
- M53: 10,702,082 km (0.091 R)
- M54: 10,915,857 km (0.056 R)
- M55: 11,033,142 km (0.105 R)
- M56: 11,209,668 km (0.117 R)
- M57: 11,387,390 km (0.039 R)
- M58: 11,506,171 km (0.082 R)
- M59: 11,585,757 km (0.107 R)
- M60: 11,645,446 km (0.064 R)
- M61: 12,147,347 km (0.059 R)
- M62: 12,615,439 km (0.106 R)
- M63: 12,965,049 km (0.105 R)
- M64: 13,089,365 km (0.103 R)
- M65: 13,193,186 km (0.102 R)
- M66: 13,590,069 km (0.112 R)
- M67: 14,075,813 km (0.094 R)
Planet 4 - Gas Giant
Semi-Major Axis: 4.23 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 574.7
Radius: 14.3
Gravity: 2.81 G
Time & Orbit
Eccentricity (e): 0.128
Orbit Range: 3.69 AU - 4.77 AU
Year: 6005 Days
Day: 6.2 Hours
Environment
Temp: -218 °C
Axial Tilt: 36.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (74)
Outer Limit: 69,989,312 km
- M1: 178,919 km (0.085 R)
- M2: 304,282 km (0.111 R)
- M3: 874,998 km (0.09 R)
- M4: 1,013,226 km (0.115 R)
- M5: 1,174,642 km (0.097 R)
- M6: 1,409,511 km (0.095 R)
- M7: 1,695,093 km (0.099 R)
- M8: 2,342,104 km (0.099 R)
- M9: 2,560,816 km (0.082 R)
- M10: 2,765,616 km (0.057 R)
- M11: 3,061,520 km (0.117 R)
- M12: 3,235,353 km (0.119 R)
- M13: 3,412,627 km (0.08 R)
- M14: 3,525,124 km (0.097 R)
- M15: 3,869,947 km (0.11 R)
- M16: 4,201,905 km (0.046 R)
- M17: 4,298,545 km (0.048 R)
- M18: 5,674,397 km (0.105 R)
- M19: 6,106,884 km (0.074 R)
- M20: 6,271,741 km (0.102 R)
- M21: 6,438,244 km (0.111 R)
- M22: 6,747,313 km (0.085 R)
- M23: 7,003,724 km (0.104 R)
- M24: 7,792,553 km (0.093 R)
- M25: 8,548,172 km (0.11 R)
- M26: 8,764,042 km (0.088 R)
- M27: 9,044,089 km (0.068 R)
- M28: 9,263,998 km (0.059 R)
- M29: 9,773,528 km (0.093 R)
- M30: 10,292,184 km (0.112 R)
- M31: 10,488,905 km (0.094 R)
- M32: 10,853,026 km (0.084 R)
- M33: 11,696,010 km (0.051 R)
- M34: 12,177,267 km (0.091 R)
- M35: 12,385,657 km (0.072 R)
- M36: 12,841,032 km (0.098 R)
- M37: 13,516,467 km (0.117 R)
- M38: 13,876,549 km (0.108 R)
- M39: 14,094,214 km (0.112 R)
- M40: 14,239,922 km (0.12 R)
- M41: 14,496,183 km (0.052 R)
- M42: 14,606,437 km (0.05 R)
- M43: 15,311,342 km (0.081 R)
- M44: 15,461,239 km (0.084 R)
- M45: 15,573,886 km (0.118 R)
- M46: 16,103,463 km (0.088 R)
- M47: 16,986,389 km (0.059 R)
- M48: 17,219,313 km (0.05 R)
- M49: 17,609,764 km (0.057 R)
- M50: 18,082,343 km (0.109 R)
- M51: 18,638,997 km (0.05 R)
- M52: 19,322,360 km (0.085 R)
- M53: 21,171,091 km (0.076 R)
- M54: 21,379,929 km (0.055 R)
- M55: 21,968,447 km (0.077 R)
- M56: 22,349,623 km (0.092 R)
- M57: 22,519,715 km (0.097 R)
- M58: 22,946,967 km (0.076 R)
- M59: 23,983,082 km (0.038 R)
- M60: 25,432,685 km (0.048 R)
- M61: 25,743,849 km (0.041 R)
- M62: 25,922,169 km (0.089 R)
- M63: 26,910,563 km (0.086 R)
- M64: 27,363,994 km (0.065 R)
- M65: 27,774,041 km (0.082 R)
- M66: 27,865,595 km (0.106 R)
- M67: 28,554,494 km (0.112 R)
- M68: 28,692,872 km (0.112 R)
- M69: 29,063,276 km (0.1 R)
- M70: 30,042,843 km (0.086 R)
- M71: 30,371,809 km (0.078 R)
- M72: 30,843,790 km (0.098 R)
- M73: 31,365,886 km (0.105 R)
- M74: 31,461,180 km (0.035 R)
Planet 5 - Ice Giant
Semi-Major Axis: 9.1 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 996.2
Radius: 6.3
Gravity: 25.1 G
Time & Orbit
Eccentricity (e): 0.167
Orbit Range: 7.58 AU - 10.62 AU
Year: 18948 Days
Day: 23.8 Hours
Environment
Temp: -225 °C
Axial Tilt: 29.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (95)
Outer Limit: 69,989,312 km
- M1: 80,932 km (0.105 R)
- M2: 387,309 km (0.106 R)
- M3: 1,683,425 km (0.062 R)
- M4: 1,853,518 km (0.093 R)
- M5: 1,958,236 km (0.088 R)
- M6: 2,588,193 km (0.077 R)
- M7: 2,666,283 km (0.047 R)
- M8: 3,192,419 km (0.105 R)
- M9: 4,017,451 km (0.086 R)
- M10: 4,153,585 km (0.06 R)
- M11: 4,953,185 km (0.082 R)
- M12: 5,001,655 km (0.083 R)
- M13: 5,646,572 km (0.072 R)
- M14: 6,108,380 km (0.097 R)
- M15: 6,850,535 km (0.108 R)
- M16: 6,958,844 km (0.085 R)
- M17: 8,016,351 km (0.064 R)
- M18: 8,073,348 km (0.073 R)
- M19: 8,360,576 km (0.062 R)
- M20: 10,839,263 km (0.079 R)
- M21: 10,902,394 km (0.068 R)
- M22: 11,604,756 km (0.036 R)
- M23: 12,785,232 km (0.078 R)
- M24: 12,918,823 km (0.071 R)
- M25: 13,254,671 km (0.111 R)
- M26: 13,593,360 km (0.112 R)
- M27: 14,487,357 km (0.114 R)
- M28: 14,556,920 km (0.032 R)
- M29: 17,874,103 km (0.058 R)
- M30: 19,693,213 km (0.108 R)
- M31: 20,859,927 km (0.094 R)
- M32: 20,938,466 km (0.107 R)
- M33: 22,772,536 km (0.093 R)
- M34: 22,853,468 km (0.111 R)
- M35: 22,934,401 km (0.05 R)
- M36: 24,823,672 km (0.045 R)
- M37: 25,073,800 km (0.12 R)
- M38: 25,576,449 km (0.049 R)
- M39: 26,506,798 km (0.112 R)
- M40: 26,591,770 km (0.05 R)
- M41: 26,762,311 km (0.092 R)
- M42: 27,190,161 km (0.089 R)
- M43: 27,620,255 km (0.073 R)
- M44: 28,487,324 km (0.107 R)
- M45: 29,099,479 km (0.05 R)
- M46: 30,247,792 km (0.11 R)
- M47: 31,141,340 km (0.079 R)
- M48: 31,771,895 km (0.106 R)
- M49: 31,952,759 km (0.03 R)
- M50: 35,642,590 km (0.105 R)
- M51: 36,207,621 km (0.117 R)
- M52: 37,537,397 km (0.037 R)
- M53: 38,786,539 km (0.108 R)
- M54: 39,756,681 km (0.104 R)
- M55: 40,440,493 km (0.104 R)
- M56: 40,538,480 km (0.075 R)
- M57: 41,819,786 km (0.046 R)
- M58: 43,515,178 km (0.059 R)
- M59: 44,320,912 km (0.06 R)
- M60: 45,029,857 km (0.082 R)
- M61: 45,946,742 km (0.06 R)
- M62: 46,664,363 km (0.102 R)
- M63: 46,869,910 km (0.059 R)
- M64: 47,075,907 km (0.084 R)
- M65: 48,214,197 km (0.106 R)
- M66: 53,931,828 km (0.1 R)
- M67: 55,775,771 km (0.084 R)
- M68: 55,884,828 km (0.036 R)
- M69: 56,431,458 km (0.057 R)
- M70: 56,540,964 km (0.034 R)
- M71: 58,635,484 km (0.093 R)
- M72: 59,971,243 km (0.103 R)
- M73: 61,204,678 km (0.082 R)
- M74: 61,880,860 km (0.105 R)
- M75: 63,240,854 km (0.079 R)
- M76: 65,299,171 km (0.05 R)
- M77: 65,874,824 km (0.107 R)
- M78: 66,220,993 km (0.101 R)
- M79: 66,336,483 km (0.084 R)
- M80: 68,427,562 km (0.077 R)
- M81: 68,661,234 km (0.109 R)
- M82: 69,129,326 km (0.098 R)
- M83: 70,658,066 km (0.098 R)
- M84: 71,249,127 km (0.111 R)
- M85: 71,841,685 km (0.096 R)
- M86: 74,708,877 km (0.036 R)
- M87: 75,310,859 km (0.056 R)
- M88: 77,126,529 km (0.148 R)
- M89: 77,856,865 km (0.054 R)
- M90: 77,978,788 km (0.073 R)
- M91: 78,222,931 km (0.087 R)
- M92: 81,418,940 km (0.084 R)
- M93: 81,914,408 km (0.057 R)
- M94: 82,535,090 km (0.177 R)
- M95: 82,908,337 km (0.068 R)
Planet 6 - Ice Giant
Semi-Major Axis: 10.19 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 423
Radius: 3.9
Gravity: 27.81 G
Time & Orbit
Eccentricity (e): 0.215
Orbit Range: 8 AU - 12.38 AU
Year: 22453 Days
Day: 24.5 Hours
Environment
Temp: -233 °C
Axial Tilt: 23 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (77)
Outer Limit: 69,989,312 km
- M1: 140,472 km (0.099 R)
- M2: 231,727 km (0.11 R)
- M3: 546,331 km (0.115 R)
- M4: 784,042 km (0.094 R)
- M5: 830,418 km (0.08 R)
- M6: 950,694 km (0.082 R)
- M7: 1,485,058 km (0.115 R)
- M8: 1,781,711 km (0.106 R)
- M9: 2,032,137 km (0.11 R)
- M10: 2,064,151 km (0.097 R)
- M11: 2,740,633 km (0.069 R)
- M12: 4,111,697 km (0.096 R)
- M13: 4,608,961 km (0.025 R)
- M14: 5,168,756 km (0.041 R)
- M15: 5,886,676 km (0.099 R)
- M16: 6,635,414 km (0.074 R)
- M17: 6,827,348 km (0.067 R)
- M18: 7,118,465 km (0.112 R)
- M19: 7,712,967 km (0.068 R)
- M20: 9,107,668 km (0.093 R)
- M21: 10,633,865 km (0.115 R)
- M22: 10,802,163 km (0.114 R)
- M23: 11,197,849 km (0.065 R)
- M24: 12,237,405 km (0.055 R)
- M25: 13,549,079 km (0.106 R)
- M26: 14,344,790 km (0.093 R)
- M27: 14,468,657 km (0.072 R)
- M28: 15,789,606 km (0.105 R)
- M29: 16,045,419 km (0.118 R)
- M30: 16,496,756 km (0.08 R)
- M31: 16,691,382 km (0.112 R)
- M32: 16,756,457 km (0.108 R)
- M33: 18,141,883 km (0.058 R)
- M34: 18,275,773 km (0.108 R)
- M35: 18,544,451 km (0.107 R)
- M36: 19,838,473 km (0.118 R)
- M37: 19,907,437 km (0.097 R)
- M38: 20,740,698 km (0.098 R)
- M39: 21,869,114 km (0.096 R)
- M40: 22,800,660 km (0.034 R)
- M41: 24,480,196 km (0.094 R)
- M42: 26,577,857 km (0.045 R)
- M43: 26,882,289 km (0.095 R)
- M44: 27,417,699 km (0.109 R)
- M45: 28,188,577 km (0.067 R)
- M46: 28,576,784 km (0.116 R)
- M47: 29,515,510 km (0.052 R)
- M48: 31,182,330 km (0.112 R)
- M49: 31,825,451 km (0.074 R)
- M50: 33,452,029 km (0.109 R)
- M51: 34,440,871 km (0.108 R)
- M52: 35,523,062 km (0.091 R)
- M53: 35,606,687 km (0.115 R)
- M54: 36,616,173 km (0.073 R)
- M55: 36,785,368 km (0.09 R)
- M56: 37,294,450 km (0.088 R)
- M57: 37,805,775 km (0.06 R)
- M58: 40,222,679 km (0.043 R)
- M59: 41,890,994 km (0.103 R)
- M60: 42,245,092 km (0.098 R)
- M61: 43,581,899 km (0.092 R)
- M62: 44,841,812 km (0.086 R)
- M63: 46,113,843 km (0.066 R)
- M64: 51,602,888 km (0.112 R)
- M65: 52,458,139 km (0.036 R)
- M66: 55,439,774 km (0.05 R)
- M67: 57,982,489 km (0.104 R)
- M68: 59,268,133 km (0.094 R)
- M69: 61,967,926 km (0.087 R)
- M70: 62,674,477 km (0.115 R)
- M71: 62,876,733 km (0.086 R)
- M72: 63,383,571 km (0.069 R)
- M73: 63,586,725 km (0.087 R)
- M74: 63,891,755 km (0.111 R)
- M75: 64,809,837 km (0.081 R)
- M76: 66,555,943 km (0.097 R)
- M77: 67,072,505 km (0.104 R)
Kuiper Belt
Range: 30 - 52 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 246 - 16,146 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.