Star System Generated (Seed: 1767917513)
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: 1.26 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 550.7
Radius: 10.5
Gravity: 5 G
Time & Orbit
Eccentricity (e): 0.171
Orbit Range: 1.04 AU - 1.48 AU
Year: 976 Days
Day: 7.6 Hours
Environment
Temp: -184 °C
Axial Tilt: 37.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (57)
Outer Limit: 73,449,185 km
- M1: 130,898 km (0.037 R)
- M2: 260,749 km (0.112 R)
- M3: 329,714 km (0.053 R)
- M4: 407,804 km (0.079 R)
- M5: 896,241 km (0.09 R)
- M6: 995,574 km (0.079 R)
- M7: 1,066,034 km (0.108 R)
- M8: 1,199,027 km (0.108 R)
- M9: 1,309,430 km (0.036 R)
- M10: 1,409,062 km (0.094 R)
- M11: 1,489,247 km (0.109 R)
- M12: 1,786,049 km (0.111 R)
- M13: 1,913,357 km (0.104 R)
- M14: 2,060,262 km (0.106 R)
- M15: 2,160,343 km (0.066 R)
- M16: 2,279,124 km (0.12 R)
- M17: 2,408,975 km (0.107 R)
- M18: 2,505,914 km (0.025 R)
- M19: 2,586,098 km (0.1 R)
- M20: 3,066,457 km (0.075 R)
- M21: 3,133,327 km (0.115 R)
- M22: 3,258,840 km (0.097 R)
- M23: 3,385,998 km (0.12 R)
- M24: 3,514,802 km (0.101 R)
- M25: 3,594,837 km (0.117 R)
- M26: 3,797,841 km (0.065 R)
- M27: 3,869,798 km (0.055 R)
- M28: 4,162,112 km (0.095 R)
- M29: 4,236,313 km (0.114 R)
- M30: 4,483,448 km (0.11 R)
- M31: 4,625,117 km (0.112 R)
- M32: 4,735,221 km (0.069 R)
- M33: 4,835,003 km (0.115 R)
- M34: 4,957,973 km (0.067 R)
- M35: 5,104,728 km (0.11 R)
- M36: 5,184,314 km (0.102 R)
- M37: 5,298,757 km (0.114 R)
- M38: 5,812,176 km (0.107 R)
- M39: 5,919,139 km (0.074 R)
- M40: 6,183,478 km (0.076 R)
- M41: 6,280,717 km (0.057 R)
- M42: 6,353,870 km (0.111 R)
- M43: 6,439,590 km (0.107 R)
- M44: 6,562,709 km (0.062 R)
- M45: 6,649,326 km (0.082 R)
- M46: 6,949,419 km (0.027 R)
- M47: 7,101,112 km (0.079 R)
- M48: 7,305,163 km (0.076 R)
- M49: 7,395,072 km (0.059 R)
- M50: 7,653,876 km (0.095 R)
- M51: 7,902,508 km (0.055 R)
- M52: 8,021,139 km (0.061 R)
- M53: 8,407,849 km (0.058 R)
- M54: 8,542,487 km (0.085 R)
- M55: 8,978,565 km (0.081 R)
- M56: 9,171,546 km (0.105 R)
- M57: 9,254,723 km (0.07 R)
Planet 2 - Gas Giant
Semi-Major Axis: 1.37 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 146.7
Radius: 11
Gravity: 1.21 G
Time & Orbit
Eccentricity (e): 0.117
Orbit Range: 1.21 AU - 1.53 AU
Year: 1107 Days
Day: 14.7 Hours
Environment
Temp: -190 °C
Axial Tilt: 32.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (45)
Outer Limit: 73,449,185 km
- M1: 137,929 km (0.088 R)
- M2: 249,080 km (0.087 R)
- M3: 341,532 km (0.092 R)
- M4: 512,971 km (0.04 R)
- M5: 598,691 km (0.095 R)
- M6: 737,667 km (0.034 R)
- M7: 955,781 km (0.084 R)
- M8: 1,106,276 km (0.109 R)
- M9: 1,216,679 km (0.11 R)
- M10: 1,364,183 km (0.072 R)
- M11: 1,443,021 km (0.114 R)
- M12: 1,523,654 km (0.107 R)
- M13: 1,635,404 km (0.061 R)
- M14: 1,707,660 km (0.112 R)
- M15: 1,799,363 km (0.094 R)
- M16: 1,955,992 km (0.107 R)
- M17: 2,130,423 km (0.071 R)
- M18: 2,269,699 km (0.118 R)
- M19: 2,487,962 km (0.055 R)
- M20: 2,606,593 km (0.103 R)
- M21: 2,770,403 km (0.084 R)
- M22: 2,886,341 km (0.076 R)
- M23: 3,018,885 km (0.096 R)
- M24: 3,160,853 km (0.07 R)
- M25: 3,289,807 km (0.049 R)
- M26: 3,366,550 km (0.086 R)
- M27: 3,592,443 km (0.099 R)
- M28: 3,663,652 km (0.109 R)
- M29: 3,767,174 km (0.113 R)
- M30: 3,871,892 km (0.064 R)
- M31: 4,034,655 km (0.068 R)
- M32: 4,166,600 km (0.084 R)
- M33: 4,588,167 km (0.052 R)
- M34: 4,674,185 km (0.036 R)
- M35: 4,769,479 km (0.103 R)
- M36: 4,847,869 km (0.107 R)
- M37: 5,067,927 km (0.107 R)
- M38: 5,246,397 km (0.051 R)
- M39: 5,490,541 km (0.1 R)
- M40: 5,581,945 km (0.09 R)
- M41: 5,747,849 km (0.078 R)
- M42: 5,849,875 km (0.071 R)
- M43: 6,046,746 km (0.056 R)
- M44: 6,437,047 km (0.077 R)
- M45: 6,582,007 km (0.034 R)
Planet 3 - Gas Giant
Semi-Major Axis: 1.98 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 613.3
Radius: 14.6
Gravity: 2.88 G
Time & Orbit
Eccentricity (e): 0.127
Orbit Range: 1.73 AU - 2.23 AU
Year: 1923 Days
Day: 14 Hours
Environment
Temp: -209 °C
Axial Tilt: 20.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (59)
Outer Limit: 73,449,185 km
- M1: 264,639 km (0.041 R)
- M2: 416,331 km (0.095 R)
- M3: 585,376 km (0.109 R)
- M4: 774,767 km (0.114 R)
- M5: 919,279 km (0.116 R)
- M6: 1,021,454 km (0.106 R)
- M7: 1,228,947 km (0.104 R)
- M8: 1,441,226 km (0.09 R)
- M9: 1,542,055 km (0.112 R)
- M10: 1,687,314 km (0.106 R)
- M11: 1,947,615 km (0.075 R)
- M12: 2,151,816 km (0.034 R)
- M13: 2,303,658 km (0.089 R)
- M14: 2,423,186 km (0.108 R)
- M15: 2,668,377 km (0.111 R)
- M16: 2,794,189 km (0.095 R)
- M17: 2,986,721 km (0.12 R)
- M18: 3,130,784 km (0.114 R)
- M19: 3,398,864 km (0.051 R)
- M20: 3,758,647 km (0.087 R)
- M21: 3,914,677 km (0.078 R)
- M22: 4,072,952 km (0.119 R)
- M23: 4,277,452 km (0.039 R)
- M24: 4,455,623 km (0.1 R)
- M25: 4,849,963 km (0.117 R)
- M26: 4,973,531 km (0.086 R)
- M27: 5,129,711 km (0.094 R)
- M28: 5,271,530 km (0.04 R)
- M29: 5,786,745 km (0.112 R)
- M30: 5,901,636 km (0.113 R)
- M31: 6,017,275 km (0.114 R)
- M32: 6,183,927 km (0.116 R)
- M33: 6,335,171 km (0.077 R)
- M34: 6,589,936 km (0.072 R)
- M35: 6,761,824 km (0.118 R)
- M36: 7,643,105 km (0.095 R)
- M37: 7,841,920 km (0.095 R)
- M38: 8,263,338 km (0.106 R)
- M39: 8,430,139 km (0.101 R)
- M40: 8,710,785 km (0.114 R)
- M41: 9,204,607 km (0.119 R)
- M42: 9,339,096 km (0.112 R)
- M43: 9,474,332 km (0.092 R)
- M44: 9,785,795 km (0.08 R)
- M45: 10,021,711 km (0.067 R)
- M46: 10,140,342 km (0.069 R)
- M47: 10,299,215 km (0.118 R)
- M48: 11,147,136 km (0.1 R)
- M49: 11,393,523 km (0.09 R)
- M50: 11,558,829 km (0.047 R)
- M51: 11,745,677 km (0.102 R)
- M52: 12,995,866 km (0.059 R)
- M53: 13,298,652 km (0.1 R)
- M54: 13,911,405 km (0.071 R)
- M55: 14,199,082 km (0.112 R)
- M56: 14,377,103 km (0.098 R)
- M57: 14,511,143 km (0.048 R)
- M58: 14,870,477 km (0.119 R)
- M59: 15,301,020 km (0.116 R)
Planet 4 - Gas Giant
Semi-Major Axis: 4.91 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 655.2
Radius: 10.2
Gravity: 6.3 G
Time & Orbit
Eccentricity (e): 0.001
Orbit Range: 4.91 AU - 4.91 AU
Year: 7510 Days
Day: 11 Hours
Environment
Temp: -231 °C
Axial Tilt: 23.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (86)
Outer Limit: 73,449,185 km
- M1: 370,704 km (0.1 R)
- M2: 510,578 km (0.079 R)
- M3: 909,705 km (0.108 R)
- M4: 1,073,664 km (0.081 R)
- M5: 1,545,795 km (0.041 R)
- M6: 1,784,254 km (0.097 R)
- M7: 2,363,796 km (0.092 R)
- M8: 2,592,681 km (0.101 R)
- M9: 2,709,965 km (0.046 R)
- M10: 2,804,960 km (0.112 R)
- M11: 3,246,723 km (0.117 R)
- M12: 3,398,864 km (0.034 R)
- M13: 3,501,637 km (0.084 R)
- M14: 3,631,638 km (0.095 R)
- M15: 3,843,020 km (0.054 R)
- M16: 4,031,214 km (0.109 R)
- M17: 4,388,902 km (0.115 R)
- M18: 4,728,340 km (0.109 R)
- M19: 4,843,381 km (0.044 R)
- M20: 4,930,297 km (0.072 R)
- M21: 5,135,097 km (0.104 R)
- M22: 5,674,546 km (0.106 R)
- M23: 5,796,917 km (0.033 R)
- M24: 6,138,001 km (0.107 R)
- M25: 6,326,793 km (0.118 R)
- M26: 6,390,223 km (0.101 R)
- M27: 6,485,666 km (0.079 R)
- M28: 6,774,988 km (0.063 R)
- M29: 7,332,839 km (0.093 R)
- M30: 7,803,474 km (0.117 R)
- M31: 7,939,757 km (0.08 R)
- M32: 8,668,149 km (0.103 R)
- M33: 8,773,915 km (0.08 R)
- M34: 8,844,675 km (0.119 R)
- M35: 9,453,987 km (0.103 R)
- M36: 9,635,898 km (0.108 R)
- M37: 9,782,205 km (0.11 R)
- M38: 10,188,213 km (0.045 R)
- M39: 10,337,362 km (0.118 R)
- M40: 10,599,907 km (0.082 R)
- M41: 10,713,152 km (0.105 R)
- M42: 11,208,471 km (0.075 R)
- M43: 12,419,466 km (0.079 R)
- M44: 12,859,283 km (0.061 R)
- M45: 12,939,767 km (0.111 R)
- M46: 13,020,400 km (0.096 R)
- M47: 13,344,728 km (0.091 R)
- M48: 13,467,100 km (0.092 R)
- M49: 13,589,770 km (0.118 R)
- M50: 13,671,749 km (0.069 R)
- M51: 13,754,028 km (0.115 R)
- M52: 13,918,735 km (0.084 R)
- M53: 14,250,544 km (0.046 R)
- M54: 14,963,976 km (0.055 R)
- M55: 15,303,713 km (0.064 R)
- M56: 15,861,264 km (0.073 R)
- M57: 16,381,864 km (0.05 R)
- M58: 16,820,037 km (0.117 R)
- M59: 17,752,630 km (0.042 R)
- M60: 18,247,799 km (0.094 R)
- M61: 18,519,917 km (0.086 R)
- M62: 19,853,582 km (0.073 R)
- M63: 20,226,978 km (0.096 R)
- M64: 20,461,548 km (0.085 R)
- M65: 21,218,064 km (0.079 R)
- M66: 21,456,374 km (0.091 R)
- M67: 22,273,328 km (0.075 R)
- M68: 23,198,441 km (0.117 R)
- M69: 24,634,431 km (0.039 R)
- M70: 25,997,118 km (0.111 R)
- M71: 27,125,535 km (0.11 R)
- M72: 27,643,742 km (0.117 R)
- M73: 27,747,862 km (0.094 R)
- M74: 28,374,827 km (0.1 R)
- M75: 28,742,688 km (0.11 R)
- M76: 29,749,182 km (0.039 R)
- M77: 30,229,990 km (0.118 R)
- M78: 30,982,916 km (0.106 R)
- M79: 31,960,089 km (0.103 R)
- M80: 32,397,663 km (0.032 R)
- M81: 32,837,181 km (0.08 R)
- M82: 33,777,853 km (0.098 R)
- M83: 34,000,454 km (0.084 R)
- M84: 34,391,204 km (0.083 R)
- M85: 35,515,881 km (0.116 R)
- M86: 36,196,402 km (0.062 R)
Planet 5 - Gas Giant
Semi-Major Axis: 4.92 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 911.8
Radius: 8.4
Gravity: 12.92 G
Time & Orbit
Eccentricity (e): 0.233
Orbit Range: 3.77 AU - 6.07 AU
Year: 7533 Days
Day: 6.4 Hours
Environment
Temp: -218 °C
Axial Tilt: 16.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (86)
Outer Limit: 73,449,185 km
- M1: 115,490 km (0.106 R)
- M2: 256,411 km (0.07 R)
- M3: 389,553 km (0.119 R)
- M4: 760,556 km (0.091 R)
- M5: 1,440,478 km (0.104 R)
- M6: 1,544,000 km (0.1 R)
- M7: 1,650,065 km (0.103 R)
- M8: 1,914,703 km (0.106 R)
- M9: 2,169,319 km (0.091 R)
- M10: 2,240,527 km (0.07 R)
- M11: 2,609,136 km (0.096 R)
- M12: 2,865,398 km (0.111 R)
- M13: 3,292,500 km (0.111 R)
- M14: 3,625,953 km (0.095 R)
- M15: 4,087,463 km (0.092 R)
- M16: 4,176,174 km (0.036 R)
- M17: 4,476,118 km (0.046 R)
- M18: 4,537,004 km (0.106 R)
- M19: 4,908,007 km (0.111 R)
- M20: 4,970,838 km (0.082 R)
- M21: 5,065,533 km (0.1 R)
- M22: 5,580,599 km (0.108 R)
- M23: 6,078,760 km (0.1 R)
- M24: 6,453,203 km (0.093 R)
- M25: 7,766,822 km (0.112 R)
- M26: 7,913,727 km (0.081 R)
- M27: 8,098,630 km (0.102 R)
- M28: 8,661,866 km (0.078 R)
- M29: 8,738,012 km (0.089 R)
- M30: 9,707,555 km (0.115 R)
- M31: 10,024,853 km (0.118 R)
- M32: 10,507,455 km (0.06 R)
- M33: 10,710,759 km (0.027 R)
- M34: 10,833,429 km (0.038 R)
- M35: 11,328,598 km (0.111 R)
- M36: 11,495,250 km (0.107 R)
- M37: 12,255,357 km (0.116 R)
- M38: 12,340,927 km (0.087 R)
- M39: 12,944,704 km (0.114 R)
- M40: 13,294,164 km (0.115 R)
- M41: 13,735,179 km (0.116 R)
- M42: 14,631,869 km (0.097 R)
- M43: 14,858,958 km (0.105 R)
- M44: 15,593,484 km (0.11 R)
- M45: 16,339,827 km (0.103 R)
- M46: 16,670,140 km (0.099 R)
- M47: 16,907,252 km (0.069 R)
- M48: 17,050,118 km (0.083 R)
- M49: 17,145,562 km (0.083 R)
- M50: 17,385,068 km (0.081 R)
- M51: 17,964,311 km (0.042 R)
- M52: 18,158,788 km (0.109 R)
- M53: 18,943,728 km (0.064 R)
- M54: 19,639,508 km (0.119 R)
- M55: 23,507,361 km (0.102 R)
- M56: 23,880,159 km (0.046 R)
- M57: 23,986,971 km (0.106 R)
- M58: 24,201,196 km (0.113 R)
- M59: 24,523,729 km (0.081 R)
- M60: 25,227,287 km (0.05 R)
- M61: 26,377,845 km (0.12 R)
- M62: 26,433,046 km (0.083 R)
- M63: 26,876,155 km (0.107 R)
- M64: 27,601,406 km (0.106 R)
- M65: 29,356,937 km (0.093 R)
- M66: 29,643,416 km (0.109 R)
- M67: 30,392,603 km (0.083 R)
- M68: 30,450,497 km (0.06 R)
- M69: 31,264,908 km (0.094 R)
- M70: 31,557,521 km (0.054 R)
- M71: 32,381,506 km (0.084 R)
- M72: 32,736,951 km (0.074 R)
- M73: 33,571,109 km (0.103 R)
- M74: 34,351,860 km (0.038 R)
- M75: 34,412,148 km (0.117 R)
- M76: 35,260,218 km (0.114 R)
- M77: 36,360,810 km (0.064 R)
- M78: 37,038,787 km (0.092 R)
- M79: 38,219,862 km (0.043 R)
- M80: 38,846,378 km (0.087 R)
- M81: 39,223,963 km (0.091 R)
- M82: 40,363,899 km (0.07 R)
- M83: 40,427,628 km (0.093 R)
- M84: 41,707,587 km (0.094 R)
- M85: 41,771,914 km (0.07 R)
- M86: 43,587,135 km (0.08 R)
Planet 6 - Ice Giant
Semi-Major Axis: 8.91 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 731.3
Radius: 5.7
Gravity: 22.51 G
Time & Orbit
Eccentricity (e): 0.148
Orbit Range: 7.59 AU - 10.23 AU
Year: 18358 Days
Day: 24.8 Hours
Environment
Temp: -229 °C
Axial Tilt: 29.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (93)
Outer Limit: 73,449,185 km
- M1: 73,153 km (0.09 R)
- M2: 233,522 km (0.083 R)
- M3: 680,072 km (0.082 R)
- M4: 966,253 km (0.111 R)
- M5: 1,762,413 km (0.094 R)
- M6: 2,085,245 km (0.107 R)
- M7: 2,496,489 km (0.093 R)
- M8: 2,531,944 km (0.105 R)
- M9: 3,391,982 km (0.087 R)
- M10: 3,431,177 km (0.026 R)
- M11: 4,592,056 km (0.057 R)
- M12: 4,811,217 km (0.099 R)
- M13: 6,100,152 km (0.088 R)
- M14: 6,196,045 km (0.094 R)
- M15: 6,831,985 km (0.12 R)
- M16: 7,642,656 km (0.112 R)
- M17: 7,798,088 km (0.073 R)
- M18: 8,590,807 km (0.106 R)
- M19: 9,023,893 km (0.105 R)
- M20: 9,243,204 km (0.069 R)
- M21: 9,798,960 km (0.105 R)
- M22: 10,710,609 km (0.12 R)
- M23: 12,248,924 km (0.062 R)
- M24: 13,291,621 km (0.066 R)
- M25: 13,478,469 km (0.116 R)
- M26: 13,541,001 km (0.08 R)
- M27: 15,788,709 km (0.077 R)
- M28: 15,854,532 km (0.034 R)
- M29: 16,385,156 km (0.069 R)
- M30: 17,056,401 km (0.048 R)
- M31: 17,463,607 km (0.061 R)
- M32: 17,531,674 km (0.103 R)
- M33: 18,287,293 km (0.086 R)
- M34: 19,194,005 km (0.1 R)
- M35: 19,405,237 km (0.109 R)
- M36: 20,401,559 km (0.109 R)
- M37: 20,761,342 km (0.106 R)
- M38: 20,905,854 km (0.073 R)
- M39: 21,853,407 km (0.116 R)
- M40: 22,074,063 km (0.1 R)
- M41: 22,517,471 km (0.062 R)
- M42: 22,964,021 km (0.059 R)
- M43: 23,941,194 km (0.088 R)
- M44: 24,625,754 km (0.06 R)
- M45: 24,702,199 km (0.064 R)
- M46: 25,625,816 km (0.1 R)
- M47: 26,639,192 km (0.106 R)
- M48: 26,717,581 km (0.104 R)
- M49: 27,348,286 km (0.092 R)
- M50: 27,586,147 km (0.066 R)
- M51: 28,063,663 km (0.097 R)
- M52: 28,624,356 km (0.107 R)
- M53: 30,821,201 km (0.114 R)
- M54: 31,233,941 km (0.076 R)
- M55: 31,316,669 km (0.118 R)
- M56: 32,232,058 km (0.039 R)
- M57: 32,735,006 km (0.062 R)
- M58: 34,173,988 km (0.08 R)
- M59: 34,515,670 km (0.034 R)
- M60: 34,772,529 km (0.108 R)
- M61: 34,944,267 km (0.086 R)
- M62: 38,702,166 km (0.091 R)
- M63: 39,504,759 km (0.06 R)
- M64: 39,683,977 km (0.077 R)
- M65: 40,403,094 km (0.084 R)
- M66: 41,945,448 km (0.106 R)
- M67: 42,677,879 km (0.062 R)
- M68: 43,414,648 km (0.091 R)
- M69: 43,877,205 km (0.108 R)
- M70: 44,062,706 km (0.039 R)
- M71: 44,248,507 km (0.074 R)
- M72: 45,274,748 km (0.106 R)
- M73: 45,837,835 km (0.054 R)
- M74: 47,350,718 km (0.115 R)
- M75: 48,783,866 km (0.095 R)
- M76: 48,975,949 km (0.06 R)
- M77: 49,168,482 km (0.102 R)
- M78: 49,940,556 km (0.12 R)
- M79: 50,716,820 km (0.097 R)
- M80: 51,399,136 km (0.11 R)
- M81: 51,692,647 km (0.114 R)
- M82: 52,970,362 km (0.063 R)
- M83: 53,167,981 km (0.119 R)
- M84: 56,764,762 km (0.086 R)
- M85: 57,879,267 km (0.074 R)
- M86: 57,980,993 km (0.103 R)
- M87: 59,513,474 km (0.079 R)
- M88: 59,616,098 km (0.067 R)
- M89: 62,617,929 km (0.073 R)
- M90: 65,033,635 km (0.101 R)
- M91: 66,412,329 km (0.114 R)
- M92: 67,800,747 km (0.048 R)
- M93: 72,022,997 km (0.123 R)
Kuiper Belt
Range: 30 - 46 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 319 - 13,800 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.