Star System Generated (Seed: 1766203714)
Star Details
Spectral Class: M6V
Temperature: 2,833 K
Mass: 0.29 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: 10.8 AU
Planetary System (7 Planets)
Planet 1 - Gas Giant
Semi-Major Axis: 0.56 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 202.9
Radius: 8.5
Gravity: 2.81 G
Time & Orbit
Eccentricity (e): 0.107
Orbit Range: 0.5 AU - 0.62 AU
Year: 284 Days
Day: 6.3 Hours
Environment
Temp: -137 °C
Axial Tilt: 25.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (27)
Outer Limit: 39,864,386 km
- M1: 107,112 km (0.087 R)
- M2: 176,825 km (0.046 R)
- M3: 296,353 km (0.096 R)
- M4: 350,957 km (0.12 R)
- M5: 510,578 km (0.098 R)
- M6: 615,595 km (0.09 R)
- M7: 741,257 km (0.103 R)
- M8: 801,994 km (0.052 R)
- M9: 884,123 km (0.026 R)
- M10: 943,364 km (0.071 R)
- M11: 1,036,414 km (0.073 R)
- M12: 1,141,881 km (0.082 R)
- M13: 1,276,369 km (0.078 R)
- M14: 1,389,914 km (0.06 R)
- M15: 1,469,799 km (0.099 R)
- M16: 1,551,180 km (0.078 R)
- M17: 1,718,730 km (0.115 R)
- M18: 1,786,647 km (0.116 R)
- M19: 2,007,304 km (0.112 R)
- M20: 2,063,852 km (0.112 R)
- M21: 2,147,926 km (0.117 R)
- M22: 2,233,047 km (0.09 R)
- M23: 2,347,041 km (0.116 R)
- M24: 2,406,731 km (0.114 R)
- M25: 2,609,585 km (0.111 R)
- M26: 2,671,519 km (0.078 R)
- M27: 2,754,994 km (0.047 R)
Planet 2 - Gas Giant
Semi-Major Axis: 0.94 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 519.8
Radius: 14.3
Gravity: 2.54 G
Time & Orbit
Eccentricity (e): 0.125
Orbit Range: 0.82 AU - 1.06 AU
Year: 618 Days
Day: 13.2 Hours
Environment
Temp: -174 °C
Axial Tilt: 39.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (45)
Outer Limit: 39,864,386 km
- M1: 186,549 km (0.08 R)
- M2: 275,709 km (0.082 R)
- M3: 414,087 km (0.102 R)
- M4: 526,585 km (0.037 R)
- M5: 665,262 km (0.072 R)
- M6: 841,488 km (0.084 R)
- M7: 936,183 km (0.054 R)
- M8: 1,035,068 km (0.054 R)
- M9: 1,132,605 km (0.108 R)
- M10: 1,360,443 km (0.034 R)
- M11: 1,451,399 km (0.092 R)
- M12: 1,550,432 km (0.061 R)
- M13: 1,780,514 km (0.104 R)
- M14: 1,880,894 km (0.098 R)
- M15: 2,015,831 km (0.109 R)
- M16: 2,107,535 km (0.098 R)
- M17: 2,214,348 km (0.072 R)
- M18: 2,440,240 km (0.11 R)
- M19: 2,545,557 km (0.106 R)
- M20: 2,688,573 km (0.118 R)
- M21: 3,027,562 km (0.104 R)
- M22: 3,164,145 km (0.063 R)
- M23: 3,388,541 km (0.094 R)
- M24: 3,490,866 km (0.049 R)
- M25: 3,787,968 km (0.084 R)
- M26: 3,943,699 km (0.071 R)
- M27: 4,051,709 km (0.079 R)
- M28: 4,143,711 km (0.092 R)
- M29: 4,304,380 km (0.055 R)
- M30: 4,432,735 km (0.109 R)
- M31: 4,579,789 km (0.091 R)
- M32: 4,702,160 km (0.073 R)
- M33: 4,834,554 km (0.112 R)
- M34: 4,994,923 km (0.068 R)
- M35: 5,239,067 km (0.055 R)
- M36: 5,376,398 km (0.039 R)
- M37: 5,598,700 km (0.074 R)
- M38: 5,842,844 km (0.042 R)
- M39: 6,042,707 km (0.04 R)
- M40: 6,186,919 km (0.117 R)
- M41: 6,312,881 km (0.103 R)
- M42: 6,410,269 km (0.114 R)
- M43: 6,537,726 km (0.102 R)
- M44: 6,656,058 km (0.093 R)
- M45: 6,815,081 km (0.115 R)
Planet 3 - Gas Giant
Semi-Major Axis: 1.25 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 11.8
Radius: 13.9
Gravity: 0.06 G
Time & Orbit
Eccentricity (e): 0.232
Orbit Range: 0.96 AU - 1.54 AU
Year: 948 Days
Day: 8 Hours
Environment
Temp: -176 °C
Axial Tilt: 34.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (16)
Outer Limit: 39,864,386 km
- M1: 174,880 km (0.114 R)
- M2: 261,647 km (0.109 R)
- M3: 348,563 km (0.118 R)
- M4: 474,824 km (0.094 R)
- M5: 623,823 km (0.077 R)
- M6: 803,041 km (0.039 R)
- M7: 902,374 km (0.082 R)
- M8: 1,112,260 km (0.089 R)
- M9: 1,211,444 km (0.068 R)
- M10: 1,393,355 km (0.058 R)
- M11: 1,483,562 km (0.096 R)
- M12: 1,578,856 km (0.109 R)
- M13: 1,750,893 km (0.115 R)
- M14: 1,868,178 km (0.069 R)
- M15: 2,151,367 km (0.093 R)
- M16: 2,298,272 km (0.049 R)
Planet 4 - Gas Giant
Semi-Major Axis: 2.52 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 383.8
Radius: 8.1
Gravity: 5.85 G
Time & Orbit
Eccentricity (e): 0.106
Orbit Range: 2.25 AU - 2.79 AU
Year: 2713 Days
Day: 7.5 Hours
Environment
Temp: -212 °C
Axial Tilt: 31 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (69)
Outer Limit: 39,864,386 km
- M1: 112,498 km (0.085 R)
- M2: 177,872 km (0.092 R)
- M3: 232,475 km (0.069 R)
- M4: 330,611 km (0.118 R)
- M5: 418,724 km (0.076 R)
- M6: 494,271 km (0.117 R)
- M7: 552,615 km (0.093 R)
- M8: 701,315 km (0.11 R)
- M9: 1,000,211 km (0.11 R)
- M10: 1,234,182 km (0.112 R)
- M11: 1,357,750 km (0.074 R)
- M12: 1,442,572 km (0.101 R)
- M13: 1,650,962 km (0.084 R)
- M14: 1,741,768 km (0.109 R)
- M15: 1,822,551 km (0.113 R)
- M16: 1,881,044 km (0.083 R)
- M17: 2,036,177 km (0.062 R)
- M18: 2,121,447 km (0.085 R)
- M19: 2,195,498 km (0.049 R)
- M20: 2,257,881 km (0.08 R)
- M21: 2,384,440 km (0.119 R)
- M22: 2,513,543 km (0.061 R)
- M23: 2,618,412 km (0.055 R)
- M24: 2,684,683 km (0.033 R)
- M25: 2,738,239 km (0.05 R)
- M26: 2,873,476 km (0.072 R)
- M27: 2,941,842 km (0.085 R)
- M28: 3,024,719 km (0.104 R)
- M29: 3,263,926 km (0.051 R)
- M30: 3,421,902 km (0.035 R)
- M31: 3,479,946 km (0.094 R)
- M32: 3,553,099 km (0.084 R)
- M33: 3,880,718 km (0.072 R)
- M34: 4,063,677 km (0.096 R)
- M35: 4,280,593 km (0.113 R)
- M36: 4,437,970 km (0.09 R)
- M37: 4,629,306 km (0.116 R)
- M38: 4,823,335 km (0.096 R)
- M39: 4,905,015 km (0.067 R)
- M40: 5,053,117 km (0.108 R)
- M41: 5,540,656 km (0.112 R)
- M42: 5,712,245 km (0.054 R)
- M43: 5,764,006 km (0.11 R)
- M44: 6,723,527 km (0.088 R)
- M45: 7,072,987 km (0.052 R)
- M46: 7,277,936 km (0.097 R)
- M47: 7,712,817 km (0.113 R)
- M48: 8,078,435 km (0.106 R)
- M49: 9,067,576 km (0.114 R)
- M50: 9,249,636 km (0.096 R)
- M51: 9,310,672 km (0.06 R)
- M52: 9,371,708 km (0.11 R)
- M53: 9,473,884 km (0.111 R)
- M54: 10,985,271 km (0.109 R)
- M55: 11,071,439 km (0.087 R)
- M56: 11,331,291 km (0.107 R)
- M57: 11,702,892 km (0.043 R)
- M58: 12,056,242 km (0.063 R)
- M59: 13,045,982 km (0.095 R)
- M60: 13,228,641 km (0.087 R)
- M61: 13,343,382 km (0.106 R)
- M62: 13,527,537 km (0.114 R)
- M63: 13,875,053 km (0.076 R)
- M64: 13,968,252 km (0.086 R)
- M65: 14,038,264 km (0.1 R)
- M66: 15,198,396 km (0.099 R)
- M67: 15,923,646 km (0.1 R)
- M68: 16,045,718 km (0.069 R)
- M69: 16,192,474 km (0.116 R)
Planet 5 - Gas Giant
Semi-Major Axis: 5.18 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 852.7
Radius: 14.7
Gravity: 3.95 G
Time & Orbit
Eccentricity (e): 0.119
Orbit Range: 4.56 AU - 5.8 AU
Year: 7996 Days
Day: 13.2 Hours
Environment
Temp: -224 °C
Axial Tilt: 4.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (82)
Outer Limit: 39,864,386 km
- M1: 272,418 km (0.071 R)
- M2: 436,078 km (0.051 R)
- M3: 707,448 km (0.118 R)
- M4: 816,804 km (0.073 R)
- M5: 967,300 km (0.095 R)
- M6: 1,581,698 km (0.111 R)
- M7: 1,752,988 km (0.04 R)
- M8: 1,863,241 km (0.118 R)
- M9: 1,998,777 km (0.081 R)
- M10: 2,525,062 km (0.108 R)
- M11: 2,856,272 km (0.062 R)
- M12: 3,040,726 km (0.077 R)
- M13: 3,533,053 km (0.099 R)
- M14: 3,731,569 km (0.108 R)
- M15: 4,409,696 km (0.111 R)
- M16: 4,810,170 km (0.042 R)
- M17: 5,912,856 km (0.113 R)
- M18: 6,320,510 km (0.116 R)
- M19: 7,199,098 km (0.106 R)
- M20: 8,003,935 km (0.101 R)
- M21: 9,738,373 km (0.037 R)
- M22: 10,179,686 km (0.105 R)
- M23: 10,341,701 km (0.068 R)
- M24: 10,545,603 km (0.115 R)
- M25: 10,998,884 km (0.076 R)
- M26: 11,458,449 km (0.092 R)
- M27: 11,924,446 km (0.101 R)
- M28: 12,138,222 km (0.066 R)
- M29: 12,613,344 km (0.111 R)
- M30: 12,831,159 km (0.076 R)
- M31: 13,226,696 km (0.097 R)
- M32: 13,448,101 km (0.099 R)
- M33: 13,670,852 km (0.073 R)
- M34: 13,984,708 km (0.095 R)
- M35: 14,165,123 km (0.058 R)
- M36: 14,573,825 km (0.103 R)
- M37: 14,756,783 km (0.078 R)
- M38: 14,894,562 km (0.11 R)
- M39: 15,032,641 km (0.09 R)
- M40: 15,823,565 km (0.051 R)
- M41: 15,917,513 km (0.07 R)
- M42: 16,200,402 km (0.09 R)
- M43: 17,155,585 km (0.057 R)
- M44: 17,300,395 km (0.116 R)
- M45: 17,639,983 km (0.109 R)
- M46: 18,375,256 km (0.071 R)
- M47: 19,270,599 km (0.108 R)
- M48: 19,673,167 km (0.083 R)
- M49: 20,231,167 km (0.069 R)
- M50: 20,486,531 km (0.113 R)
- M51: 20,691,629 km (0.065 R)
- M52: 21,000,549 km (0.105 R)
- M53: 21,311,114 km (0.109 R)
- M54: 21,623,026 km (0.064 R)
- M55: 22,041,451 km (0.033 R)
- M56: 24,010,907 km (0.064 R)
- M57: 24,281,380 km (0.084 R)
- M58: 24,498,447 km (0.04 R)
- M59: 24,661,658 km (0.12 R)
- M60: 26,481,366 km (0.037 R)
- M61: 26,985,062 km (0.091 R)
- M62: 29,089,156 km (0.111 R)
- M63: 29,262,091 km (0.09 R)
- M64: 30,365,226 km (0.069 R)
- M65: 30,482,212 km (0.106 R)
- M66: 31,778,028 km (0.105 R)
- M67: 32,253,750 km (0.081 R)
- M68: 32,552,347 km (0.097 R)
- M69: 33,212,223 km (0.072 R)
- M70: 33,876,737 km (0.109 R)
- M71: 33,997,911 km (0.096 R)
- M72: 34,728,697 km (0.104 R)
- M73: 35,280,115 km (0.115 R)
- M74: 35,464,569 km (0.107 R)
- M75: 35,649,322 km (0.109 R)
- M76: 35,957,943 km (0.069 R)
- M77: 36,578,026 km (0.11 R)
- M78: 37,577,340 km (0.09 R)
- M79: 38,712,339 km (0.095 R)
- M80: 39,156,794 km (0.066 R)
- M81: 40,243,174 km (0.085 R)
- M82: 41,145,398 km (0.102 R)
Planet 6 - Ice Giant
Semi-Major Axis: 6.23 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 847.3
Radius: 5.4
Gravity: 29.06 G
Time & Orbit
Eccentricity (e): 0.006
Orbit Range: 6.19 AU - 6.27 AU
Year: 10547 Days
Day: 20.8 Hours
Environment
Temp: -229 °C
Axial Tilt: 123.6 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (93)
Outer Limit: 39,864,386 km
- M1: 174,880 km (0.074 R)
- M2: 303,384 km (0.117 R)
- M3: 1,204,861 km (0.053 R)
- M4: 1,983,219 km (0.039 R)
- M5: 2,225,418 km (0.089 R)
- M6: 2,620,655 km (0.094 R)
- M7: 2,678,999 km (0.09 R)
- M8: 3,160,405 km (0.096 R)
- M9: 3,571,200 km (0.091 R)
- M10: 3,635,827 km (0.116 R)
- M11: 4,407,452 km (0.099 R)
- M12: 5,486,801 km (0.106 R)
- M13: 6,094,318 km (0.089 R)
- M14: 6,524,113 km (0.088 R)
- M15: 7,248,765 km (0.076 R)
- M16: 7,745,729 km (0.08 R)
- M17: 8,040,886 km (0.103 R)
- M18: 8,598,437 km (0.077 R)
- M19: 9,301,846 km (0.116 R)
- M20: 10,576,719 km (0.115 R)
- M21: 10,997,987 km (0.113 R)
- M22: 11,424,789 km (0.111 R)
- M23: 12,441,457 km (0.028 R)
- M24: 12,786,728 km (0.041 R)
- M25: 13,335,753 km (0.102 R)
- M26: 15,766,718 km (0.113 R)
- M27: 16,355,086 km (0.026 R)
- M28: 16,570,956 km (0.111 R)
- M29: 17,169,048 km (0.062 R)
- M30: 17,388,209 km (0.041 R)
- M31: 17,498,164 km (0.113 R)
- M32: 17,718,821 km (0.101 R)
- M33: 19,345,997 km (0.113 R)
- M34: 19,917,909 km (0.046 R)
- M35: 20,033,100 km (0.118 R)
- M36: 20,263,929 km (0.068 R)
- M37: 21,020,146 km (0.096 R)
- M38: 21,726,398 km (0.103 R)
- M39: 22,261,061 km (0.058 R)
- M40: 22,560,107 km (0.032 R)
- M41: 22,860,350 km (0.095 R)
- M42: 23,891,378 km (0.111 R)
- M43: 24,013,600 km (0.058 R)
- M44: 24,689,782 km (0.046 R)
- M45: 24,999,300 km (0.065 R)
- M46: 25,434,780 km (0.088 R)
- M47: 25,497,162 km (0.096 R)
- M48: 26,376,199 km (0.113 R)
- M49: 26,882,887 km (0.082 R)
- M50: 27,648,978 km (0.072 R)
- M51: 27,713,155 km (0.119 R)
- M52: 28,422,249 km (0.102 R)
- M53: 28,551,801 km (0.106 R)
- M54: 28,876,727 km (0.104 R)
- M55: 29,990,184 km (0.11 R)
- M56: 30,717,978 km (0.081 R)
- M57: 30,850,970 km (0.037 R)
- M58: 30,984,113 km (0.089 R)
- M59: 31,251,145 km (0.108 R)
- M60: 32,123,749 km (0.102 R)
- M61: 33,277,149 km (0.096 R)
- M62: 34,030,524 km (0.081 R)
- M63: 34,789,583 km (0.082 R)
- M64: 37,100,122 km (0.059 R)
- M65: 37,383,461 km (0.099 R)
- M66: 37,596,488 km (0.087 R)
- M67: 37,809,964 km (0.074 R)
- M68: 38,309,621 km (0.109 R)
- M69: 38,955,136 km (0.115 R)
- M70: 39,893,863 km (0.11 R)
- M71: 40,475,349 km (0.105 R)
- M72: 41,720,004 km (0.111 R)
- M73: 41,793,606 km (0.116 R)
- M74: 43,424,073 km (0.114 R)
- M75: 45,529,065 km (0.119 R)
- M76: 45,756,603 km (0.068 R)
- M77: 45,832,449 km (0.117 R)
- M78: 46,365,018 km (0.069 R)
- M79: 46,899,680 km (0.102 R)
- M80: 47,975,140 km (0.09 R)
- M81: 48,748,261 km (0.085 R)
- M82: 49,058,677 km (0.084 R)
- M83: 49,136,318 km (0.088 R)
- M84: 50,620,479 km (0.119 R)
- M85: 50,856,095 km (0.069 R)
- M86: 51,013,472 km (0.113 R)
- M87: 51,802,451 km (0.086 R)
- M88: 51,881,589 km (0.074 R)
- M89: 52,040,013 km (0.053 R)
- M90: 52,198,587 km (0.083 R)
- M91: 52,595,619 km (0.082 R)
- M92: 52,834,228 km (0.109 R)
- M93: 53,073,285 km (0.066 R)
Planet 7 - Ice Giant
Semi-Major Axis: 6.59 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 299.3
Radius: 5
Gravity: 11.97 G
Time & Orbit
Eccentricity (e): 0.032
Orbit Range: 6.38 AU - 6.8 AU
Year: 11474 Days
Day: 15.6 Hours
Environment
Temp: -237 °C
Axial Tilt: 27.2 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (83)
Outer Limit: 39,864,386 km
- M1: 68,665 km (0.08 R)
- M2: 258,804 km (0.098 R)
- M3: 290,070 km (0.1 R)
- M4: 392,545 km (0.026 R)
- M5: 442,062 km (0.06 R)
- M6: 632,649 km (0.084 R)
- M7: 847,173 km (0.054 R)
- M8: 1,118,992 km (0.094 R)
- M9: 1,264,551 km (0.046 R)
- M10: 1,377,946 km (0.091 R)
- M11: 1,821,204 km (0.036 R)
- M12: 2,014,635 km (0.06 R)
- M13: 2,705,627 km (0.05 R)
- M14: 2,876,617 km (0.068 R)
- M15: 3,001,083 km (0.118 R)
- M16: 3,254,950 km (0.106 R)
- M17: 3,437,011 km (0.113 R)
- M18: 3,489,520 km (0.084 R)
- M19: 3,865,160 km (0.088 R)
- M20: 3,947,289 km (0.095 R)
- M21: 4,281,790 km (0.102 R)
- M22: 4,538,650 km (0.098 R)
- M23: 4,654,439 km (0.086 R)
- M24: 5,157,387 km (0.102 R)
- M25: 5,615,306 km (0.06 R)
- M26: 5,864,835 km (0.035 R)
- M27: 5,927,816 km (0.091 R)
- M28: 6,086,240 km (0.081 R)
- M29: 6,667,876 km (0.089 R)
- M30: 7,848,802 km (0.092 R)
- M31: 8,516,607 km (0.085 R)
- M32: 8,623,719 km (0.076 R)
- M33: 9,459,522 km (0.109 R)
- M34: 9,496,323 km (0.073 R)
- M35: 10,780,172 km (0.12 R)
- M36: 11,285,215 km (0.119 R)
- M37: 11,997,300 km (0.096 R)
- M38: 12,969,088 km (0.117 R)
- M39: 13,010,078 km (0.047 R)
- M40: 13,923,822 km (0.087 R)
- M41: 14,176,642 km (0.098 R)
- M42: 14,558,715 km (0.05 R)
- M43: 14,686,771 km (0.039 R)
- M44: 14,901,145 km (0.08 R)
- M45: 15,550,250 km (0.058 R)
- M46: 16,563,476 km (0.051 R)
- M47: 16,697,217 km (0.08 R)
- M48: 17,055,653 km (0.095 R)
- M49: 19,305,456 km (0.054 R)
- M50: 20,345,460 km (0.102 R)
- M51: 20,536,496 km (0.092 R)
- M52: 21,113,196 km (0.091 R)
- M53: 21,161,516 km (0.106 R)
- M54: 22,875,160 km (0.057 R)
- M55: 22,924,677 km (0.085 R)
- M56: 23,422,838 km (0.101 R)
- M57: 24,378,918 km (0.081 R)
- M58: 24,683,499 km (0.113 R)
- M59: 25,193,927 km (0.088 R)
- M60: 25,553,411 km (0.119 R)
- M61: 25,656,334 km (0.118 R)
- M62: 26,537,465 km (0.109 R)
- M63: 28,169,279 km (0.045 R)
- M64: 28,275,793 km (0.115 R)
- M65: 28,329,050 km (0.114 R)
- M66: 28,542,376 km (0.114 R)
- M67: 28,702,745 km (0.114 R)
- M68: 30,540,854 km (0.085 R)
- M69: 30,595,457 km (0.112 R)
- M70: 31,033,779 km (0.045 R)
- M71: 33,876,139 km (0.111 R)
- M72: 33,932,687 km (0.11 R)
- M73: 34,272,723 km (0.107 R)
- M74: 34,556,959 km (0.106 R)
- M75: 35,070,528 km (0.1 R)
- M76: 36,047,402 km (0.087 R)
- M77: 36,105,147 km (0.108 R)
- M78: 36,684,390 km (0.097 R)
- M79: 37,091,595 km (0.04 R)
- M80: 37,383,311 km (0.064 R)
- M81: 38,145,662 km (0.106 R)
- M82: 38,912,949 km (0.113 R)
- M83: 39,387,773 km (0.115 R)
Kuiper Belt
Range: 30 - 48 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 229 - 13,409 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.