🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.54 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.12

Radius: 1.58

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.247

Orbit Range: 0.41 AU - 0.67 AU

Year: 150 Days

Day: 40.6 Hours

Environment

Temp: 167 °C

Axial Tilt: 58.4 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.78 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.68

Radius: 1.68

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.178

Orbit Range: 0.64 AU - 0.92 AU

Year: 261 Days

Day: 19.9 Hours

Environment

Temp: 93 °C

Axial Tilt: 29.9 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (2)

Outer Limit: 58,273,763 km

• M1: 405,709 km (0.078 R)
• M2: 652,247 km (0.057 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.55 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.67

Radius: 1.85

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.032

Orbit Range: 1.5 AU - 1.6 AU

Year: 731 Days

Day: 47.9 Hours

Environment

Temp: -57 °C

Axial Tilt: 17.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 2.16 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.67

Radius: 1.48

Gravity: 1.22 G

Time & Orbit

Eccentricity (e): 0.136

Orbit Range: 1.87 AU - 2.45 AU

Year: 1202 Days

Day: 47.1 Hours

Environment

Temp: -89 °C

Axial Tilt: 13.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 3.87 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.09

Radius: 1.04

Gravity: 1.01 G

Time & Orbit

Eccentricity (e): 0.147

Orbit Range: 3.3 AU - 4.44 AU

Year: 2883 Days

Day: 22.8 Hours

Environment

Temp: -127 °C

Axial Tilt: 15.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 4.48 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 313.3

Radius: 8

Gravity: 4.9 G

Time & Orbit

Eccentricity (e): 0.169

Orbit Range: 3.72 AU - 5.24 AU

Year: 3591 Days

Day: 14.8 Hours

Environment

Temp: -138 °C

Axial Tilt: 5.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 58,273,763 km

• M1: 102,475 km (0.086 R)
• M2: 195,973 km (0.109 R)
• M3: 473,178 km (0.037 R)
• M4: 721,959 km (0.106 R)
• M5: 776,563 km (0.026 R)
• M6: 929,601 km (0.11 R)
• M7: 1,113,756 km (0.076 R)
• M8: 1,188,555 km (0.103 R)
• M9: 1,612,366 km (0.095 R)
• M10: 1,697,637 km (0.112 R)
• M11: 1,784,553 km (0.055 R)
• M12: 1,847,534 km (0.116 R)
• M13: 2,053,979 km (0.078 R)
• M14: 2,133,415 km (0.069 R)
• M15: 2,336,420 km (0.079 R)
• M16: 2,645,788 km (0.036 R)
• M17: 2,893,672 km (0.082 R)
• M18: 2,953,212 km (0.077 R)
• M19: 3,013,051 km (0.061 R)
• M20: 3,149,185 km (0.117 R)
• M21: 3,210,370 km (0.111 R)
• M22: 3,475,009 km (0.072 R)
• M23: 3,617,875 km (0.067 R)
• M24: 3,730,522 km (0.045 R)
• M25: 4,293,608 km (0.065 R)
• M26: 4,430,042 km (0.065 R)
• M27: 4,724,600 km (0.086 R)
• M28: 4,883,174 km (0.089 R)
• M29: 5,133,301 km (0.061 R)
• M30: 5,369,367 km (0.051 R)
• M31: 5,442,819 km (0.119 R)
• M32: 5,498,021 km (0.111 R)
• M33: 6,524,113 km (0.116 R)
• M34: 6,700,937 km (0.068 R)
• M35: 6,919,051 km (0.113 R)
• M36: 7,939,907 km (0.047 R)
• M37: 8,170,886 km (0.095 R)
• M38: 8,340,231 km (0.104 R)
• M39: 8,425,202 km (0.115 R)
• M40: 8,639,277 km (0.082 R)
• M41: 8,790,221 km (0.08 R)
• M42: 9,050,970 km (0.054 R)
• M43: 9,424,666 km (0.061 R)
• M44: 9,825,887 km (0.119 R)
• M45: 10,006,003 km (0.102 R)
• M46: 10,209,905 km (0.083 R)
• M47: 10,876,364 km (0.106 R)
• M48: 10,992,751 km (0.027 R)
• M49: 11,062,763 km (0.084 R)
• M50: 11,651,879 km (0.072 R)
• M51: 11,842,467 km (0.034 R)
• M52: 11,986,230 km (0.119 R)
• M53: 12,106,357 km (0.11 R)
• M54: 12,566,820 km (0.109 R)
• M55: 13,008,283 km (0.064 R)
• M56: 13,479,666 km (0.029 R)
• M57: 13,529,631 km (0.106 R)
• M58: 14,311,879 km (0.12 R)
• M59: 14,388,323 km (0.085 R)
• M60: 14,772,790 km (0.077 R)
• M61: 14,824,251 km (0.077 R)
• M62: 15,005,115 km (0.114 R)
• M63: 15,893,577 km (0.046 R)
• M64: 15,946,385 km (0.09 R)
• M65: 16,131,587 km (0.087 R)
• M66: 16,211,173 km (0.086 R)
• M67: 16,424,051 km (0.067 R)
• M68: 16,584,420 km (0.099 R)
• M69: 16,664,754 km (0.027 R)
• M70: 16,825,871 km (0.067 R)
• M71: 17,285,136 km (0.108 R)
• M72: 17,666,312 km (0.106 R)
• M73: 17,748,441 km (0.112 R)
• M74: 17,940,375 km (0.104 R)
• M75: 18,078,005 km (0.084 R)
• M76: 18,298,812 km (0.084 R)
• M77: 18,631,667 km (0.087 R)

Planet 7 - Gas Giant

Semi-Major Axis: 7.6 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 19.5

Radius: 13.5

Gravity: 0.11 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 6.03 AU - 9.17 AU

Year: 7935 Days

Day: 14.4 Hours

Environment

Temp: -159 °C

Axial Tilt: 15.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (38)

Outer Limit: 58,273,763 km

• M1: 169,943 km (0.111 R)
• M2: 323,131 km (0.12 R)
• M3: 582,983 km (0.054 R)
• M4: 676,033 km (0.093 R)
• M5: 788,680 km (0.11 R)
• M6: 1,128,866 km (0.071 R)
• M7: 1,453,792 km (0.059 R)
• M8: 1,875,509 km (0.077 R)
• M9: 2,130,872 km (0.107 R)
• M10: 2,556,927 km (0.078 R)
• M11: 3,021,428 km (0.106 R)
• M12: 3,136,020 km (0.025 R)
• M13: 3,240,439 km (0.085 R)
• M14: 3,524,675 km (0.049 R)
• M15: 3,804,872 km (0.025 R)
• M16: 4,245,288 km (0.102 R)
• M17: 4,361,227 km (0.11 R)
• M18: 4,636,038 km (0.066 R)
• M19: 4,970,539 km (0.066 R)
• M20: 5,299,056 km (0.05 R)
• M21: 5,776,871 km (0.078 R)
• M22: 5,934,548 km (0.065 R)
• M23: 6,166,275 km (0.099 R)
• M24: 6,445,574 km (0.052 R)
• M25: 6,743,872 km (0.112 R)
• M26: 7,401,055 km (0.117 R)
• M27: 7,541,079 km (0.069 R)
• M28: 7,760,988 km (0.039 R)
• M29: 7,855,833 km (0.063 R)
• M30: 7,998,699 km (0.107 R)
• M31: 9,040,648 km (0.097 R)
• M32: 9,713,539 km (0.059 R)
• M33: 10,038,765 km (0.107 R)
• M34: 10,841,208 km (0.106 R)
• M35: 11,107,492 km (0.103 R)
• M36: 11,268,160 km (0.107 R)
• M37: 11,646,194 km (0.043 R)
• M38: 12,285,725 km (0.086 R)

Planet 8 - Gas Giant

Semi-Major Axis: 10.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 727.2

Radius: 10.9

Gravity: 6.12 G

Time & Orbit

Eccentricity (e): 0.236

Orbit Range: 8.07 AU - 13.05 AU

Year: 12997 Days

Day: 7.1 Hours

Environment

Temp: -177 °C

Axial Tilt: 1.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 58,273,763 km

• M1: 145,110 km (0.059 R)
• M2: 393,293 km (0.084 R)
• M3: 468,092 km (0.111 R)
• M4: 785,090 km (0.06 R)
• M5: 989,440 km (0.09 R)
• M6: 1,401,134 km (0.058 R)
• M7: 1,474,885 km (0.109 R)
• M8: 1,678,189 km (0.042 R)
• M9: 1,945,371 km (0.082 R)
• M10: 2,028,248 km (0.102 R)
• M11: 2,140,596 km (0.099 R)
• M12: 2,255,188 km (0.091 R)
• M13: 2,371,874 km (0.117 R)
• M14: 2,641,898 km (0.038 R)
• M15: 3,081,716 km (0.097 R)
• M16: 3,544,572 km (0.066 R)
• M17: 3,888,797 km (0.109 R)
• M18: 3,994,263 km (0.067 R)
• M19: 4,243,942 km (0.087 R)
• M20: 4,758,559 km (0.116 R)
• M21: 5,023,496 km (0.094 R)
• M22: 5,215,580 km (0.067 R)
• M23: 6,130,820 km (0.114 R)
• M24: 6,253,789 km (0.062 R)
• M25: 7,441,596 km (0.119 R)
• M26: 7,971,771 km (0.099 R)
• M27: 8,651,694 km (0.076 R)
• M28: 8,975,274 km (0.116 R)
• M29: 9,068,473 km (0.061 R)
• M30: 9,302,893 km (0.071 R)
• M31: 9,539,407 km (0.057 R)
• M32: 9,825,887 km (0.063 R)
• M33: 10,407,225 km (0.109 R)
• M34: 10,800,966 km (0.075 R)
• M35: 11,149,529 km (0.025 R)
• M36: 12,062,824 km (0.105 R)
• M37: 13,370,908 km (0.114 R)
• M38: 14,122,937 km (0.117 R)
• M39: 14,833,676 km (0.112 R)
• M40: 14,999,281 km (0.04 R)
• M41: 15,276,785 km (0.118 R)
• M42: 15,893,278 km (0.081 R)
• M43: 16,062,772 km (0.095 R)
• M44: 16,574,995 km (0.107 R)
• M45: 17,266,287 km (0.054 R)
• M46: 17,849,719 km (0.096 R)
• M47: 18,261,861 km (0.026 R)
• M48: 18,856,064 km (0.077 R)
• M49: 19,155,708 km (0.066 R)
• M50: 19,275,835 km (0.09 R)
• M51: 20,185,839 km (0.112 R)
• M52: 21,171,839 km (0.06 R)
• M53: 21,608,066 km (0.085 R)
• M54: 21,795,961 km (0.102 R)
• M55: 22,110,416 km (0.047 R)
• M56: 24,809,909 km (0.088 R)
• M57: 26,131,457 km (0.066 R)
• M58: 26,532,529 km (0.092 R)
• M59: 26,733,738 km (0.091 R)
• M60: 27,543,810 km (0.054 R)
• M61: 30,091,911 km (0.1 R)
• M62: 31,287,647 km (0.053 R)
• M63: 35,556,871 km (0.112 R)
• M64: 37,045,070 km (0.117 R)
• M65: 37,120,019 km (0.077 R)
• M66: 37,345,164 km (0.107 R)
• M67: 37,872,347 km (0.118 R)
• M68: 38,174,534 km (0.065 R)
• M69: 38,857,598 km (0.108 R)
• M70: 40,467,271 km (0.06 R)
• M71: 40,621,656 km (0.071 R)
• M72: 40,853,683 km (0.051 R)
• M73: 41,163,649 km (0.112 R)
• M74: 41,241,291 km (0.074 R)
• M75: 43,989,104 km (0.112 R)
• M76: 44,227,264 km (0.084 R)
• M77: 46,390,898 km (0.079 R)
• M78: 46,714,329 km (0.07 R)
• M79: 47,770,789 km (0.033 R)
• M80: 47,934,000 km (0.098 R)
• M81: 49,989,924 km (0.119 R)
• M82: 51,070,469 km (0.041 R)
• M83: 53,085,253 km (0.104 R)
• M84: 53,338,971 km (0.099 R)
• M85: 53,762,632 km (0.105 R)
• M86: 54,784,087 km (0.109 R)
• M87: 57,279,080 km (0.079 R)
• M88: 57,539,231 km (0.097 R)
• M89: 57,712,914 km (0.115 R)
• M90: 57,799,830 km (0.091 R)
• M91: 57,973,812 km (0.077 R)

Planet 9 - Ice Giant

Semi-Major Axis: 13.01 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 132.3

Radius: 4.9

Gravity: 5.51 G

Time & Orbit

Eccentricity (e): 0.223

Orbit Range: 10.11 AU - 15.91 AU

Year: 17773 Days

Day: 16.8 Hours

Environment

Temp: -194 °C

Axial Tilt: 15.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (87)

Outer Limit: 58,273,763 km

• M1: 95,593 km (0.104 R)
• M2: 231,129 km (0.118 R)
• M3: 271,819 km (0.11 R)
• M4: 349,909 km (0.08 R)
• M5: 861,534 km (0.093 R)
• M6: 1,031,627 km (0.056 R)
• M7: 1,193,641 km (0.055 R)
• M8: 1,325,437 km (0.115 R)
• M9: 1,363,884 km (0.079 R)
• M10: 1,422,377 km (0.104 R)
• M11: 1,521,710 km (0.051 R)
• M12: 1,769,444 km (0.095 R)
• M13: 2,164,532 km (0.117 R)
• M14: 3,058,080 km (0.096 R)
• M15: 3,135,123 km (0.085 R)
• M16: 4,685,256 km (0.106 R)
• M17: 4,744,496 km (0.052 R)
• M18: 4,893,496 km (0.064 R)
• M19: 4,953,485 km (0.119 R)
• M20: 5,195,983 km (0.092 R)
• M21: 5,226,650 km (0.118 R)
• M22: 5,914,801 km (0.114 R)
• M23: 5,946,815 km (0.118 R)
• M24: 6,269,647 km (0.096 R)
• M25: 6,965,875 km (0.12 R)
• M26: 7,512,506 km (0.107 R)
• M27: 8,828,967 km (0.066 R)
• M28: 10,061,803 km (0.103 R)
• M29: 10,253,288 km (0.118 R)
• M30: 10,952,509 km (0.049 R)
• M31: 11,070,542 km (0.112 R)
• M32: 11,188,874 km (0.114 R)
• M33: 11,307,804 km (0.095 R)
• M34: 11,347,597 km (0.084 R)
• M35: 11,626,896 km (0.047 R)
• M36: 12,766,682 km (0.099 R)
• M37: 13,140,527 km (0.099 R)
• M38: 14,541,960 km (0.029 R)
• M39: 14,585,194 km (0.07 R)
• M40: 15,502,379 km (0.058 R)
• M41: 15,634,922 km (0.082 R)
• M42: 16,618,379 km (0.104 R)
• M43: 17,026,482 km (0.112 R)
• M44: 17,483,653 km (0.045 R)
• M45: 17,575,655 km (0.051 R)
• M46: 18,084,139 km (0.065 R)
• M47: 18,223,713 km (0.032 R)
• M48: 19,590,888 km (0.088 R)
• M49: 19,829,946 km (0.077 R)
• M50: 19,877,817 km (0.053 R)
• M51: 21,235,268 km (0.083 R)
• M52: 21,480,908 km (0.112 R)
• M53: 21,579,343 km (0.111 R)
• M54: 21,826,180 km (0.086 R)
• M55: 22,223,212 km (0.095 R)
• M56: 22,372,661 km (0.059 R)
• M57: 22,923,480 km (0.091 R)
• M58: 22,973,745 km (0.111 R)
• M59: 23,024,159 km (0.114 R)
• M60: 24,243,233 km (0.091 R)
• M61: 24,860,623 km (0.087 R)
• M62: 25,015,756 km (0.112 R)
• M63: 25,067,666 km (0.093 R)
• M64: 25,327,069 km (0.091 R)
• M65: 25,796,507 km (0.116 R)
• M66: 26,796,719 km (0.067 R)
• M67: 27,274,833 km (0.069 R)
• M68: 27,863,202 km (0.098 R)
• M69: 28,293,595 km (0.109 R)
• M70: 28,780,536 km (0.117 R)
• M71: 29,270,319 km (0.11 R)
• M72: 29,543,485 km (0.04 R)
• M73: 30,037,457 km (0.111 R)
• M74: 30,202,763 km (0.109 R)
• M75: 33,342,523 km (0.113 R)
• M76: 34,488,742 km (0.093 R)
• M77: 34,546,487 km (0.083 R)
• M78: 35,764,513 km (0.109 R)
• M79: 35,939,692 km (0.051 R)
• M80: 37,351,297 km (0.055 R)
• M81: 37,647,651 km (0.075 R)
• M82: 37,766,282 km (0.111 R)
• M83: 38,123,372 km (0.085 R)
• M84: 38,421,670 km (0.088 R)
• M85: 38,900,682 km (0.098 R)
• M86: 39,441,927 km (0.032 R)
• M87: 39,864,691 km (0.08 R)

Planet 10 - Ice Giant

Semi-Major Axis: 15.67 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 223

Radius: 6.6

Gravity: 5.12 G

Time & Orbit

Eccentricity (e): 0.215

Orbit Range: 12.3 AU - 19.04 AU

Year: 23494 Days

Day: 16.5 Hours

Environment

Temp: -207 °C

Axial Tilt: 31.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 58,273,763 km

• M1: 109,057 km (0.09 R)
• M2: 199,863 km (0.088 R)
• M3: 446,849 km (0.055 R)
• M4: 600,935 km (0.117 R)
• M5: 713,283 km (0.106 R)
• M6: 853,306 km (0.096 R)
• M7: 1,473,539 km (0.061 R)
• M8: 2,090,331 km (0.117 R)
• M9: 2,263,266 km (0.091 R)
• M10: 2,809,598 km (0.114 R)
• M11: 2,904,592 km (0.114 R)
• M12: 3,496,551 km (0.1 R)
• M13: 3,598,876 km (0.088 R)
• M14: 4,196,968 km (0.12 R)
• M15: 4,600,284 km (0.101 R)
• M16: 5,016,017 km (0.068 R)
• M17: 5,247,893 km (0.101 R)
• M18: 5,762,360 km (0.085 R)
• M19: 6,417,300 km (0.092 R)
• M20: 7,095,726 km (0.111 R)
• M21: 7,575,337 km (0.085 R)
• M22: 7,975,511 km (0.054 R)
• M23: 8,155,627 km (0.07 R)
• M24: 8,200,806 km (0.033 R)
• M25: 8,382,567 km (0.092 R)
• M26: 8,750,129 km (0.058 R)
• M27: 9,169,901 km (0.114 R)
• M28: 11,567,805 km (0.096 R)
• M29: 11,925,493 km (0.083 R)
• M30: 12,338,533 km (0.089 R)
• M31: 12,966,994 km (0.08 R)
• M32: 13,391,852 km (0.05 R)
• M33: 13,445,258 km (0.102 R)
• M34: 14,309,485 km (0.104 R)
• M35: 14,364,088 km (0.104 R)
• M36: 14,693,204 km (0.091 R)
• M37: 14,914,160 km (0.108 R)
• M38: 15,247,314 km (0.079 R)
• M39: 15,470,963 km (0.112 R)
• M40: 16,261,887 km (0.036 R)
• M41: 17,182,063 km (0.072 R)
• M42: 17,648,360 km (0.105 R)
• M43: 18,000,813 km (0.113 R)
• M44: 18,474,439 km (0.079 R)
• M45: 19,072,233 km (0.105 R)
• M46: 19,737,045 km (0.089 R)
• M47: 20,717,660 km (0.033 R)
• M48: 21,151,643 km (0.09 R)
• M49: 21,776,812 km (0.059 R)
• M50: 22,028,586 km (0.1 R)
• M51: 22,853,618 km (0.073 R)
• M52: 23,430,617 km (0.086 R)
• M53: 27,127,180 km (0.108 R)
• M54: 27,330,185 km (0.05 R)
• M55: 27,465,870 km (0.095 R)
• M56: 27,601,854 km (0.047 R)
• M57: 28,353,284 km (0.027 R)
• M58: 29,249,974 km (0.099 R)
• M59: 29,458,214 km (0.108 R)
• M60: 29,736,616 km (0.091 R)
• M61: 31,283,608 km (0.05 R)
• M62: 33,000,991 km (0.09 R)
• M63: 33,217,758 km (0.044 R)
• M64: 33,725,494 km (0.072 R)
• M65: 34,528,535 km (0.053 R)
• M66: 35,190,206 km (0.11 R)
• M67: 35,485,662 km (0.072 R)
• M68: 35,856,216 km (0.108 R)
• M69: 37,200,353 km (0.068 R)
• M70: 37,501,344 km (0.101 R)
• M71: 37,803,083 km (0.113 R)
• M72: 38,030,023 km (0.055 R)
• M73: 38,409,104 km (0.07 R)
• M74: 39,018,266 km (0.107 R)
• M75: 40,014,887 km (0.094 R)
• M76: 40,477,743 km (0.115 R)
• M77: 41,020,035 km (0.12 R)
• M78: 42,190,040 km (0.076 R)
• M79: 43,608,378 km (0.106 R)
• M80: 43,846,238 km (0.058 R)
• M81: 44,243,720 km (0.099 R)
• M82: 44,642,548 km (0.099 R)
• M83: 45,765,130 km (0.109 R)
• M84: 45,926,247 km (0.114 R)
• M85: 46,410,795 km (0.111 R)
• M86: 48,858,964 km (0.114 R)
• M87: 49,436,112 km (0.093 R)
• M88: 49,849,900 km (0.088 R)
• M89: 51,264,946 km (0.105 R)
• M90: 52,356,113 km (0.113 R)
• M91: 53,964,440 km (0.042 R)
• M92: 55,760,811 km (0.038 R)
• M93: 56,019,167 km (0.106 R)
• M94: 56,882,795 km (0.117 R)
• M95: 58,099,325 km (0.061 R)

Kuiper Belt

Range: 30 - 59 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 197 - 12,796 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit