🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 1.32 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 948

Radius: 8.3

Gravity: 13.76 G

Time & Orbit

Eccentricity (e): 0.003

Orbit Range: 1.32 AU - 1.32 AU

Year: 995 Days

Day: 11.8 Hours

Environment

Temp: -163 °C

Axial Tilt: 26.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (66)

Outer Limit: 41,509,871 km

• M1: 103,522 km (0.063 R)
• M2: 197,619 km (0.106 R)
• M3: 253,868 km (0.095 R)
• M4: 327,320 km (0.095 R)
• M5: 399,875 km (0.119 R)
• M6: 473,477 km (0.06 R)
• M7: 546,481 km (0.079 R)
• M8: 692,189 km (0.085 R)
• M9: 756,965 km (0.084 R)
• M10: 899,831 km (0.092 R)
• M11: 1,022,352 km (0.117 R)
• M12: 1,220,569 km (0.081 R)
• M13: 1,805,198 km (0.098 R)
• M14: 1,942,828 km (0.069 R)
• M15: 2,074,474 km (0.092 R)
• M16: 2,160,642 km (0.117 R)
• M17: 2,326,696 km (0.092 R)
• M18: 2,456,547 km (0.083 R)
• M19: 2,537,778 km (0.052 R)
• M20: 2,599,263 km (0.074 R)
• M21: 2,860,760 km (0.118 R)
• M22: 2,946,180 km (0.087 R)
• M23: 3,174,766 km (0.086 R)
• M24: 3,319,128 km (0.055 R)
• M25: 3,603,065 km (0.11 R)
• M26: 3,707,185 km (0.053 R)
• M27: 4,013,561 km (0.045 R)
• M28: 4,073,400 km (0.113 R)
• M29: 4,316,048 km (0.028 R)
• M30: 4,488,535 km (0.043 R)
• M31: 4,840,688 km (0.105 R)
• M32: 5,007,190 km (0.095 R)
• M33: 5,071,667 km (0.055 R)
• M34: 5,254,027 km (0.078 R)
• M35: 5,306,386 km (0.078 R)
• M36: 5,425,167 km (0.113 R)
• M37: 5,504,753 km (0.114 R)
• M38: 5,665,271 km (0.092 R)
• M39: 5,963,420 km (0.049 R)
• M40: 6,406,230 km (0.073 R)
• M41: 6,504,515 km (0.1 R)
• M42: 6,702,733 km (0.077 R)
• M43: 6,802,514 km (0.061 R)
• M44: 6,888,384 km (0.102 R)
• M45: 7,061,468 km (0.03 R)
• M46: 7,235,899 km (0.093 R)
• M47: 7,500,239 km (0.05 R)
• M48: 7,648,341 km (0.106 R)
• M49: 7,947,836 km (0.076 R)
• M50: 8,023,233 km (0.094 R)
• M51: 8,144,407 km (0.101 R)
• M52: 8,235,812 km (0.096 R)
• M53: 8,434,777 km (0.105 R)
• M54: 8,806,527 km (0.087 R)
• M55: 8,962,857 km (0.073 R)
• M56: 9,199,371 km (0.116 R)
• M57: 9,342,088 km (0.09 R)
• M58: 9,549,730 km (0.075 R)
• M59: 9,758,867 km (0.107 R)
• M60: 10,018,420 km (0.066 R)
• M61: 10,378,951 km (0.096 R)
• M62: 10,477,984 km (0.12 R)
• M63: 10,894,166 km (0.048 R)
• M64: 11,078,919 km (0.111 R)
• M65: 11,281,774 km (0.087 R)
• M66: 11,417,758 km (0.107 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.41 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 641.7

Radius: 10

Gravity: 6.42 G

Time & Orbit

Eccentricity (e): 0.129

Orbit Range: 1.23 AU - 1.59 AU

Year: 1098 Days

Day: 5.2 Hours

Environment

Temp: -184 °C

Axial Tilt: 22.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (62)

Outer Limit: 41,509,871 km

• M1: 128,056 km (0.063 R)
• M2: 265,237 km (0.109 R)
• M3: 356,043 km (0.064 R)
• M4: 425,905 km (0.116 R)
• M5: 491,279 km (0.078 R)
• M6: 560,842 km (0.083 R)
• M7: 657,632 km (0.112 R)
• M8: 785,838 km (0.097 R)
• M9: 850,015 km (0.113 R)
• M10: 943,065 km (0.087 R)
• M11: 1,025,793 km (0.09 R)
• M12: 1,162,226 km (0.082 R)
• M13: 1,304,793 km (0.117 R)
• M14: 1,445,415 km (0.119 R)
• M15: 1,509,592 km (0.097 R)
• M16: 1,624,334 km (0.103 R)
• M17: 1,776,176 km (0.096 R)
• M18: 1,915,302 km (0.058 R)
• M19: 2,195,199 km (0.086 R)
• M20: 2,344,797 km (0.104 R)
• M21: 2,411,368 km (0.083 R)
• M22: 2,634,568 km (0.049 R)
• M23: 2,905,340 km (0.058 R)
• M24: 3,143,201 km (0.117 R)
• M25: 3,248,667 km (0.098 R)
• M26: 3,693,272 km (0.108 R)
• M27: 3,793,503 km (0.098 R)
• M28: 3,872,191 km (0.108 R)
• M29: 3,939,959 km (0.099 R)
• M30: 4,273,263 km (0.1 R)
• M31: 4,343,425 km (0.1 R)
• M32: 4,544,185 km (0.103 R)
• M33: 4,615,842 km (0.105 R)
• M34: 4,711,884 km (0.101 R)
• M35: 5,352,612 km (0.099 R)
• M36: 5,479,022 km (0.05 R)
• M37: 5,657,642 km (0.108 R)
• M38: 5,773,431 km (0.103 R)
• M39: 5,838,207 km (0.108 R)
• M40: 5,903,132 km (0.09 R)
• M41: 6,033,731 km (0.084 R)
• M42: 6,404,734 km (0.066 R)
• M43: 6,592,928 km (0.078 R)
• M44: 6,715,000 km (0.083 R)
• M45: 6,975,001 km (0.094 R)
• M46: 7,043,965 km (0.072 R)
• M47: 7,182,643 km (0.065 R)
• M48: 7,561,574 km (0.116 R)
• M49: 7,746,327 km (0.106 R)
• M50: 8,236,859 km (0.086 R)
• M51: 8,530,071 km (0.072 R)
• M52: 8,618,633 km (0.058 R)
• M53: 8,811,763 km (0.076 R)
• M54: 8,886,413 km (0.104 R)
• M55: 9,081,488 km (0.105 R)
• M56: 9,247,692 km (0.093 R)
• M57: 9,629,166 km (0.095 R)
• M58: 9,953,644 km (0.053 R)
• M59: 10,234,589 km (0.103 R)
• M60: 10,439,239 km (0.055 R)
• M61: 10,581,656 km (0.093 R)
• M62: 10,645,085 km (0.048 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 613.1

Radius: 8

Gravity: 9.58 G

Time & Orbit

Eccentricity (e): 0.042

Orbit Range: 2.43 AU - 2.65 AU

Year: 2656 Days

Day: 5.6 Hours

Environment

Temp: -193 °C

Axial Tilt: 3.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 41,509,871 km

• M1: 115,639 km (0.062 R)
• M2: 174,581 km (0.028 R)
• M3: 251,324 km (0.113 R)
• M4: 318,195 km (0.052 R)
• M5: 406,906 km (0.106 R)
• M6: 537,206 km (0.058 R)
• M7: 603,627 km (0.104 R)
• M8: 699,819 km (0.106 R)
• M9: 773,271 km (0.06 R)
• M10: 849,566 km (0.07 R)
• M11: 989,440 km (0.114 R)
• M12: 1,126,173 km (0.109 R)
• M13: 1,291,778 km (0.086 R)
• M14: 1,549,385 km (0.085 R)
• M15: 1,952,701 km (0.103 R)
• M16: 2,125,786 km (0.096 R)
• M17: 2,345,695 km (0.118 R)
• M18: 2,674,810 km (0.047 R)
• M19: 3,064,363 km (0.1 R)
• M20: 3,172,372 km (0.077 R)
• M21: 3,344,709 km (0.12 R)
• M22: 4,013,860 km (0.108 R)
• M23: 4,251,721 km (0.112 R)
• M24: 4,407,004 km (0.074 R)
• M25: 4,687,948 km (0.118 R)
• M26: 4,812,713 km (0.069 R)
• M27: 4,920,424 km (0.074 R)
• M28: 4,974,578 km (0.047 R)
• M29: 5,359,643 km (0.11 R)
• M30: 5,508,942 km (0.111 R)
• M31: 5,678,436 km (0.105 R)
• M32: 5,811,428 km (0.115 R)
• M33: 6,080,705 km (0.082 R)
• M34: 6,872,377 km (0.064 R)
• M35: 7,136,566 km (0.115 R)
• M36: 7,259,685 km (0.082 R)
• M37: 7,466,430 km (0.093 R)
• M38: 7,591,344 km (0.12 R)
• M39: 7,759,043 km (0.082 R)
• M40: 8,140,967 km (0.111 R)
• M41: 8,205,144 km (0.103 R)
• M42: 9,166,759 km (0.105 R)
• M43: 9,570,374 km (0.119 R)
• M44: 9,683,620 km (0.114 R)
• M45: 10,002,712 km (0.097 R)
• M46: 10,348,582 km (0.104 R)
• M47: 10,815,926 km (0.118 R)
• M48: 11,529,657 km (0.084 R)
• M49: 12,160,512 km (0.111 R)
• M50: 12,381,468 km (0.107 R)
• M51: 12,480,202 km (0.034 R)
• M52: 12,603,770 km (0.064 R)
• M53: 12,927,350 km (0.025 R)
• M54: 13,455,730 km (0.081 R)
• M55: 13,914,098 km (0.047 R)
• M56: 14,016,722 km (0.068 R)
• M57: 14,171,107 km (0.114 R)
• M58: 14,274,330 km (0.114 R)
• M59: 14,794,182 km (0.093 R)
• M60: 14,977,589 km (0.112 R)
• M61: 15,240,881 km (0.055 R)
• M62: 16,580,381 km (0.105 R)
• M63: 16,634,685 km (0.046 R)
• M64: 17,291,719 km (0.041 R)
• M65: 17,512,525 km (0.089 R)
• M66: 17,567,876 km (0.072 R)
• M67: 17,678,878 km (0.113 R)
• M68: 17,734,379 km (0.115 R)
• M69: 17,790,029 km (0.11 R)
• M70: 18,152,804 km (0.104 R)
• M71: 18,433,599 km (0.112 R)
• M72: 18,687,467 km (0.092 R)
• M73: 18,744,015 km (0.115 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.87 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 604.5

Radius: 13.1

Gravity: 3.52 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 2.4 AU - 3.34 AU

Year: 3190 Days

Day: 11.3 Hours

Environment

Temp: -201 °C

Axial Tilt: 50 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 41,509,871 km

• M1: 163,660 km (0.117 R)
• M2: 257,458 km (0.071 R)
• M3: 366,216 km (0.079 R)
• M4: 617,989 km (0.089 R)
• M5: 718,967 km (0.105 R)
• M6: 846,574 km (0.034 R)
• M7: 940,073 km (0.087 R)
• M8: 1,070,522 km (0.119 R)
• M9: 1,278,613 km (0.113 R)
• M10: 1,387,969 km (0.036 R)
• M11: 1,475,334 km (0.113 R)
• M12: 1,629,570 km (0.099 R)
• M13: 1,776,026 km (0.086 R)
• M14: 1,954,945 km (0.075 R)
• M15: 2,111,125 km (0.061 R)
• M16: 2,316,074 km (0.056 R)
• M17: 2,466,570 km (0.068 R)
• M18: 2,636,064 km (0.073 R)
• M19: 2,793,591 km (0.106 R)
• M20: 2,970,415 km (0.12 R)
• M21: 3,285,020 km (0.093 R)
• M22: 3,575,688 km (0.108 R)
• M23: 3,928,590 km (0.115 R)
• M24: 4,018,648 km (0.075 R)
• M25: 4,200,708 km (0.074 R)
• M26: 4,497,959 km (0.075 R)
• M27: 5,152,450 km (0.093 R)
• M28: 5,612,164 km (0.097 R)
• M29: 5,795,721 km (0.117 R)
• M30: 6,189,911 km (0.088 R)
• M31: 6,273,985 km (0.112 R)
• M32: 6,464,573 km (0.086 R)
• M33: 6,571,386 km (0.064 R)
• M34: 7,069,995 km (0.112 R)
• M35: 7,784,176 km (0.06 R)
• M36: 8,126,904 km (0.086 R)
• M37: 8,685,652 km (0.098 R)
• M38: 9,668,959 km (0.092 R)
• M39: 9,815,864 km (0.027 R)
• M40: 10,087,085 km (0.114 R)
• M41: 10,360,700 km (0.061 R)
• M42: 10,460,930 km (0.098 R)
• M43: 10,662,139 km (0.115 R)
• M44: 11,273,696 km (0.119 R)
• M45: 11,454,260 km (0.115 R)
• M46: 11,635,722 km (0.067 R)
• M47: 11,765,873 km (0.078 R)
• M48: 11,948,980 km (0.118 R)
• M49: 12,265,230 km (0.059 R)
• M50: 12,717,913 km (0.111 R)
• M51: 13,475,327 km (0.115 R)
• M52: 13,914,846 km (0.098 R)
• M53: 13,997,723 km (0.104 R)
• M54: 14,275,377 km (0.108 R)
• M55: 14,359,002 km (0.03 R)
• M56: 14,470,752 km (0.082 R)
• M57: 14,582,800 km (0.115 R)
• M58: 15,005,714 km (0.097 R)
• M59: 15,518,386 km (0.095 R)
• M60: 15,719,445 km (0.064 R)
• M61: 15,979,147 km (0.109 R)
• M62: 16,240,195 km (0.052 R)
• M63: 16,327,560 km (0.103 R)
• M64: 17,179,969 km (0.112 R)
• M65: 17,387,910 km (0.072 R)
• M66: 17,716,427 km (0.074 R)
• M67: 17,806,335 km (0.037 R)
• M68: 19,730,164 km (0.072 R)
• M69: 20,574,644 km (0.099 R)
• M70: 21,271,620 km (0.118 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 562.7

Radius: 8.8

Gravity: 7.27 G

Time & Orbit

Eccentricity (e): 0.182

Orbit Range: 2.54 AU - 3.68 AU

Year: 3598 Days

Day: 6.5 Hours

Environment

Temp: -195 °C

Axial Tilt: 31 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 41,509,871 km

• M1: 115,190 km (0.109 R)
• M2: 178,171 km (0.071 R)
• M3: 270,323 km (0.096 R)
• M4: 400,922 km (0.061 R)
• M5: 519,105 km (0.116 R)
• M6: 729,888 km (0.064 R)
• M7: 867,368 km (0.081 R)
• M8: 1,084,285 km (0.104 R)
• M9: 1,280,558 km (0.116 R)
• M10: 1,370,167 km (0.115 R)
• M11: 1,475,185 km (0.084 R)
• M12: 1,749,697 km (0.034 R)
• M13: 2,176,499 km (0.094 R)
• M14: 2,331,034 km (0.098 R)
• M15: 2,393,865 km (0.069 R)
• M16: 2,700,391 km (0.119 R)
• M17: 3,439,853 km (0.06 R)
• M18: 3,638,819 km (0.111 R)
• M19: 3,748,923 km (0.117 R)
• M20: 3,822,974 km (0.04 R)
• M21: 4,142,963 km (0.104 R)
• M22: 4,570,065 km (0.068 R)
• M23: 4,629,456 km (0.072 R)
• M24: 4,748,835 km (0.089 R)
• M25: 4,909,802 km (0.078 R)
• M26: 5,072,565 km (0.114 R)
• M27: 6,216,988 km (0.094 R)
• M28: 6,570,937 km (0.1 R)
• M29: 6,660,396 km (0.082 R)
• M30: 6,727,865 km (0.11 R)
• M31: 6,954,207 km (0.101 R)
• M32: 7,183,241 km (0.103 R)
• M33: 7,368,144 km (0.059 R)
• M34: 7,507,868 km (0.116 R)
• M35: 7,601,517 km (0.098 R)
• M36: 7,908,491 km (0.075 R)
• M37: 8,243,740 km (0.061 R)
• M38: 8,364,615 km (0.096 R)
• M39: 8,559,242 km (0.061 R)
• M40: 8,804,732 km (0.085 R)
• M41: 9,152,099 km (0.114 R)
• M42: 10,014,530 km (0.095 R)
• M43: 10,169,514 km (0.082 R)
• M44: 10,299,215 km (0.07 R)
• M45: 10,982,428 km (0.09 R)
• M46: 11,142,199 km (0.081 R)
• M47: 11,571,994 km (0.085 R)
• M48: 13,316,754 km (0.119 R)
• M49: 13,945,065 km (0.117 R)
• M50: 14,905,782 km (0.085 R)
• M51: 14,964,724 km (0.025 R)
• M52: 15,023,665 km (0.102 R)
• M53: 15,112,377 km (0.108 R)
• M54: 15,349,490 km (0.105 R)
• M55: 15,827,604 km (0.056 R)
• M56: 16,098,676 km (0.056 R)
• M57: 16,462,498 km (0.112 R)
• M58: 16,951,832 km (0.067 R)
• M59: 17,136,586 km (0.055 R)
• M60: 17,291,120 km (0.099 R)
• M61: 17,601,386 km (0.096 R)
• M62: 18,007,544 km (0.108 R)
• M63: 18,480,124 km (0.045 R)
• M64: 18,797,421 km (0.049 R)
• M65: 19,598,518 km (0.063 R)
• M66: 19,824,710 km (0.107 R)
• M67: 20,345,310 km (0.092 R)
• M68: 20,640,018 km (0.027 R)
• M69: 21,134,439 km (0.073 R)
• M70: 21,233,772 km (0.108 R)
• M71: 21,399,826 km (0.054 R)
• M72: 21,532,818 km (0.085 R)
• M73: 21,632,750 km (0.085 R)
• M74: 21,766,341 km (0.077 R)
• M75: 22,269,588 km (0.095 R)
• M76: 22,505,803 km (0.077 R)

Planet 6 - Ice Giant

Semi-Major Axis: 5.99 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 481

Radius: 6.5

Gravity: 11.38 G

Time & Orbit

Eccentricity (e): 0.009

Orbit Range: 5.94 AU - 6.04 AU

Year: 9617 Days

Day: 16.4 Hours

Environment

Temp: -213 °C

Axial Tilt: 7.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 41,509,871 km

• M1: 105,167 km (0.074 R)
• M2: 198,068 km (0.052 R)
• M3: 412,292 km (0.072 R)
• M4: 516,561 km (0.113 R)
• M5: 615,146 km (0.034 R)
• M6: 1,274,873 km (0.114 R)
• M7: 1,332,468 km (0.097 R)
• M8: 1,430,455 km (0.098 R)
• M9: 1,654,552 km (0.114 R)
• M10: 1,696,440 km (0.113 R)
• M11: 1,781,561 km (0.073 R)
• M12: 2,000,273 km (0.097 R)
• M13: 2,274,336 km (0.099 R)
• M14: 2,368,284 km (0.087 R)
• M15: 2,463,578 km (0.103 R)
• M16: 3,010,358 km (0.046 R)
• M17: 3,165,940 km (0.118 R)
• M18: 4,502,447 km (0.114 R)
• M19: 4,860,884 km (0.083 R)
• M20: 5,197,479 km (0.086 R)
• M21: 5,828,632 km (0.062 R)
• M22: 6,484,021 km (0.094 R)
• M23: 6,956,451 km (0.059 R)
• M24: 7,024,966 km (0.076 R)
• M25: 7,093,632 km (0.114 R)
• M26: 7,721,344 km (0.116 R)
• M27: 8,476,066 km (0.071 R)
• M28: 8,585,871 km (0.089 R)
• M29: 9,291,823 km (0.08 R)
• M30: 9,632,607 km (0.09 R)
• M31: 9,900,686 km (0.063 R)
• M32: 10,093,518 km (0.105 R)
• M33: 10,404,831 km (0.076 R)
• M34: 11,196,802 km (0.033 R)
• M35: 11,518,886 km (0.106 R)
• M36: 12,254,908 km (0.098 R)
• M37: 12,545,277 km (0.089 R)
• M38: 12,837,891 km (0.077 R)
• M39: 12,879,928 km (0.108 R)
• M40: 14,117,401 km (0.081 R)
• M41: 14,290,935 km (0.039 R)
• M42: 14,640,396 km (0.038 R)
• M43: 14,948,418 km (0.111 R)
• M44: 16,247,376 km (0.093 R)
• M45: 16,979,358 km (0.111 R)
• M46: 17,395,839 km (0.084 R)
• M47: 17,442,364 km (0.107 R)
• M48: 17,535,414 km (0.027 R)
• M49: 18,380,642 km (0.073 R)
• M50: 18,712,898 km (0.069 R)
• M51: 19,383,396 km (0.112 R)
• M52: 19,721,637 km (0.065 R)
• M53: 20,257,048 km (0.082 R)
• M54: 20,305,966 km (0.109 R)
• M55: 21,841,738 km (0.041 R)
• M56: 21,891,853 km (0.086 R)
• M57: 21,942,118 km (0.066 R)
• M58: 22,294,571 km (0.069 R)
• M59: 22,750,395 km (0.104 R)
• M60: 23,568,546 km (0.066 R)
• M61: 23,723,081 km (0.097 R)
• M62: 24,084,808 km (0.067 R)
• M63: 25,444,204 km (0.114 R)
• M64: 26,026,888 km (0.118 R)
• M65: 26,453,391 km (0.099 R)
• M66: 26,882,289 km (0.115 R)
• M67: 26,935,994 km (0.04 R)
• M68: 27,205,270 km (0.118 R)
• M69: 27,421,439 km (0.075 R)
• M70: 27,529,748 km (0.105 R)
• M71: 28,950,330 km (0.025 R)
• M72: 29,115,785 km (0.06 R)
• M73: 29,281,539 km (0.09 R)
• M74: 29,947,699 km (0.119 R)
• M75: 30,226,699 km (0.09 R)
• M76: 30,506,596 km (0.049 R)
• M77: 30,843,640 km (0.108 R)
• M78: 31,181,881 km (0.036 R)
• M79: 31,464,621 km (0.068 R)
• M80: 32,261,080 km (0.04 R)
• M81: 32,891,485 km (0.106 R)
• M82: 33,006,526 km (0.065 R)
• M83: 33,583,824 km (0.057 R)
• M84: 33,641,868 km (0.092 R)
• M85: 34,339,294 km (0.051 R)
• M86: 36,104,100 km (0.086 R)
• M87: 36,937,659 km (0.054 R)
• M88: 37,717,363 km (0.07 R)
• M89: 38,139,379 km (0.096 R)
• M90: 39,110,119 km (0.054 R)
• M91: 40,027,453 km (0.101 R)

Kuiper Belt

Range: 30 - 56 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 544 - 20,085 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit