🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.69 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.74

Radius: 0.89

Gravity: 0.93 G

Time & Orbit

Eccentricity (e): 0.214

Orbit Range: 0.54 AU - 0.84 AU

Year: 213 Days

Day: 31.3 Hours

Environment

Temp: 105 °C

Axial Tilt: 16.5 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.71 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.36

Radius: 0.66

Gravity: 0.83 G

Time & Orbit

Eccentricity (e): 0.132

Orbit Range: 1.48 AU - 1.94 AU

Year: 829 Days

Day: 42.5 Hours

Environment

Temp: -63 °C

Axial Tilt: 4.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 94,686,071 km

• M1: 284,685 km (0.109 R)
• M2: 554,111 km (0.063 R)

Asteroid Belt

Center: 4.92 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 3 - Gas Giant

Semi-Major Axis: 8.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 693

Radius: 12.9

Gravity: 4.16 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 6.79 AU - 9.47 AU

Year: 8597 Days

Day: 14.1 Hours

Environment

Temp: -176 °C

Axial Tilt: 31.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 94,686,071 km

• M1: 203,752 km (0.085 R)
• M2: 292,314 km (0.085 R)
• M3: 456,423 km (0.066 R)
• M4: 1,068,578 km (0.089 R)
• M5: 1,253,630 km (0.12 R)
• M6: 1,370,017 km (0.088 R)
• M7: 1,656,348 km (0.098 R)
• M8: 1,741,768 km (0.098 R)
• M9: 1,939,686 km (0.038 R)
• M10: 2,099,008 km (0.109 R)
• M11: 2,215,544 km (0.082 R)
• M12: 2,310,390 km (0.052 R)
• M13: 2,504,268 km (0.098 R)
• M14: 2,754,396 km (0.092 R)
• M15: 3,333,639 km (0.052 R)
• M16: 3,442,995 km (0.075 R)
• M17: 3,892,836 km (0.036 R)
• M18: 4,242,596 km (0.055 R)
• M19: 4,481,503 km (0.115 R)
• M20: 4,879,284 km (0.055 R)
• M21: 5,098,295 km (0.116 R)
• M22: 5,416,789 km (0.097 R)
• M23: 5,774,777 km (0.109 R)
• M24: 6,755,241 km (0.047 R)
• M25: 7,070,145 km (0.116 R)
• M26: 7,860,022 km (0.112 R)
• M27: 8,191,231 km (0.094 R)
• M28: 8,414,731 km (0.104 R)
• M29: 8,715,722 km (0.111 R)
• M30: 9,097,047 km (0.107 R)
• M31: 9,328,474 km (0.118 R)
• M32: 12,425,001 km (0.037 R)
• M33: 12,811,113 km (0.117 R)
• M34: 13,244,947 km (0.119 R)
• M35: 13,595,305 km (0.076 R)
• M36: 14,082,246 km (0.087 R)
• M37: 14,891,421 km (0.106 R)
• M38: 15,027,705 km (0.106 R)
• M39: 15,669,330 km (0.08 R)
• M40: 16,366,905 km (0.12 R)
• M41: 17,027,080 km (0.088 R)
• M42: 17,264,941 km (0.096 R)
• M43: 18,082,044 km (0.115 R)
• M44: 18,178,984 km (0.085 R)
• M45: 18,666,374 km (0.086 R)
• M46: 18,862,496 km (0.085 R)
• M47: 19,010,149 km (0.089 R)
• M48: 19,207,469 km (0.057 R)
• M49: 19,356,020 km (0.082 R)
• M50: 20,254,953 km (0.096 R)
• M51: 20,709,432 km (0.071 R)
• M52: 21,269,676 km (0.082 R)
• M53: 21,372,001 km (0.078 R)
• M54: 22,093,362 km (0.105 R)
• M55: 25,382,869 km (0.115 R)
• M56: 26,201,319 km (0.118 R)
• M57: 26,807,190 km (0.119 R)
• M58: 27,028,595 km (0.055 R)
• M59: 27,250,599 km (0.111 R)
• M60: 27,473,350 km (0.073 R)
• M61: 28,821,975 km (0.1 R)
• M62: 29,504,290 km (0.085 R)
• M63: 29,618,583 km (0.118 R)
• M64: 29,904,914 km (0.092 R)
• M65: 30,827,184 km (0.078 R)
• M66: 31,001,167 km (0.104 R)
• M67: 33,054,846 km (0.054 R)
• M68: 33,769,027 km (0.097 R)
• M69: 33,888,555 km (0.054 R)
• M70: 34,789,583 km (0.047 R)
• M71: 35,152,208 km (0.103 R)
• M72: 36,369,935 km (0.077 R)
• M73: 36,860,915 km (0.064 R)
• M74: 37,292,206 km (0.117 R)
• M75: 37,849,458 km (0.053 R)
• M76: 38,035,707 km (0.074 R)
• M77: 38,909,209 km (0.067 R)
• M78: 39,726,313 km (0.041 R)
• M79: 39,852,574 km (0.052 R)
• M80: 40,676,110 km (0.104 R)
• M81: 42,340,237 km (0.064 R)
• M82: 42,533,667 km (0.084 R)

Planet 4 - Gas Giant

Semi-Major Axis: 10.06 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 696.9

Radius: 9.9

Gravity: 7.11 G

Time & Orbit

Eccentricity (e): 0.032

Orbit Range: 9.74 AU - 10.38 AU

Year: 11833 Days

Day: 13 Hours

Environment

Temp: -176 °C

Axial Tilt: 39.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 94,686,071 km

• M1: 127,906 km (0.108 R)
• M2: 232,026 km (0.085 R)
• M3: 335,847 km (0.117 R)
• M4: 779,704 km (0.095 R)
• M5: 1,014,872 km (0.105 R)
• M6: 1,250,489 km (0.069 R)
• M7: 2,167,075 km (0.035 R)
• M8: 2,416,155 km (0.109 R)
• M9: 3,470,671 km (0.083 R)
• M10: 3,664,250 km (0.094 R)
• M11: 4,096,289 km (0.103 R)
• M12: 4,232,573 km (0.08 R)
• M13: 4,370,203 km (0.083 R)
• M14: 4,936,131 km (0.063 R)
• M15: 5,154,245 km (0.088 R)
• M16: 5,638,045 km (0.057 R)
• M17: 5,789,737 km (0.059 R)
• M18: 5,904,478 km (0.11 R)
• M19: 6,097,460 km (0.073 R)
• M20: 7,174,863 km (0.096 R)
• M21: 7,339,571 km (0.108 R)
• M22: 7,505,475 km (0.112 R)
• M23: 7,672,576 km (0.054 R)
• M24: 8,224,293 km (0.053 R)
• M25: 8,701,211 km (0.106 R)
• M26: 9,276,414 km (0.112 R)
• M27: 9,545,990 km (0.089 R)
• M28: 10,185,221 km (0.045 R)
• M29: 10,324,048 km (0.071 R)
• M30: 10,603,497 km (0.113 R)
• M31: 10,885,489 km (0.091 R)
• M32: 11,169,875 km (0.106 R)
• M33: 11,746,275 km (0.045 R)
• M34: 12,728,086 km (0.031 R)
• M35: 12,977,765 km (0.092 R)
• M36: 13,736,226 km (0.052 R)
• M37: 14,665,378 km (0.118 R)
• M38: 15,190,317 km (0.11 R)
• M39: 15,614,727 km (0.095 R)
• M40: 15,882,058 km (0.103 R)
• M41: 15,989,320 km (0.109 R)
• M42: 16,366,905 km (0.111 R)
• M43: 16,692,878 km (0.113 R)
• M44: 18,920,241 km (0.091 R)
• M45: 19,491,555 km (0.096 R)
• M46: 20,651,088 km (0.076 R)
• M47: 22,492,339 km (0.088 R)
• M48: 22,673,352 km (0.106 R)
• M49: 23,830,642 km (0.106 R)
• M50: 23,953,611 km (0.044 R)
• M51: 24,944,697 km (0.07 R)
• M52: 26,139,086 km (0.113 R)
• M53: 26,839,055 km (0.047 R)
• M54: 27,480,680 km (0.083 R)
• M55: 27,609,633 km (0.104 R)
• M56: 27,997,690 km (0.107 R)
• M57: 28,387,542 km (0.063 R)
• M58: 29,041,285 km (0.094 R)
• M59: 29,501,897 km (0.066 R)
• M60: 30,230,439 km (0.101 R)
• M61: 30,563,743 km (0.072 R)
• M62: 31,368,280 km (0.079 R)
• M63: 31,705,474 km (0.06 R)
• M64: 31,908,478 km (0.117 R)
• M65: 32,998,298 km (0.068 R)
• M66: 33,478,807 km (0.099 R)
• M67: 36,907,291 km (0.108 R)
• M68: 37,620,573 km (0.067 R)
• M69: 37,835,545 km (0.064 R)
• M70: 38,050,817 km (0.108 R)
• M71: 38,338,494 km (0.112 R)
• M72: 38,410,450 km (0.087 R)
• M73: 39,060,902 km (0.073 R)
• M74: 40,372,576 km (0.066 R)
• M75: 41,033,798 km (0.118 R)
• M76: 41,550,509 km (0.119 R)
• M77: 42,963,910 km (0.113 R)
• M78: 44,090,980 km (0.12 R)
• M79: 44,999,638 km (0.102 R)
• M80: 45,990,873 km (0.053 R)
• M81: 46,835,353 km (0.091 R)
• M82: 48,773,394 km (0.116 R)
• M83: 49,399,162 km (0.106 R)
• M84: 50,342,675 km (0.115 R)
• M85: 50,579,638 km (0.051 R)
• M86: 50,658,626 km (0.115 R)
• M87: 51,451,046 km (0.113 R)
• M88: 51,769,241 km (0.098 R)
• M89: 52,247,655 km (0.093 R)

Planet 5 - Gas Giant

Semi-Major Axis: 10.55 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 997.8

Radius: 10.5

Gravity: 9.05 G

Time & Orbit

Eccentricity (e): 0.156

Orbit Range: 8.9 AU - 12.2 AU

Year: 12708 Days

Day: 9.2 Hours

Environment

Temp: -182 °C

Axial Tilt: 6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 94,686,071 km

• M1: 203,902 km (0.107 R)
• M2: 297,251 km (0.112 R)
• M3: 461,210 km (0.118 R)
• M4: 1,089,072 km (0.057 R)
• M5: 1,258,716 km (0.115 R)
• M6: 1,791,285 km (0.116 R)
• M7: 2,202,978 km (0.09 R)
• M8: 2,326,097 km (0.118 R)
• M9: 3,009,909 km (0.072 R)
• M10: 3,534,848 km (0.113 R)
• M11: 3,863,515 km (0.052 R)
• M12: 3,937,865 km (0.062 R)
• M13: 4,787,880 km (0.119 R)
• M14: 5,233,831 km (0.067 R)
• M15: 6,472,801 km (0.044 R)
• M16: 6,605,943 km (0.055 R)
• M17: 7,147,936 km (0.05 R)
• M18: 7,704,290 km (0.097 R)
• M19: 7,845,511 km (0.109 R)
• M20: 11,271,003 km (0.102 R)
• M21: 11,538,933 km (0.102 R)
• M22: 11,972,168 km (0.108 R)
• M23: 12,966,246 km (0.109 R)
• M24: 13,360,137 km (0.1 R)
• M25: 13,530,080 km (0.084 R)
• M26: 13,986,803 km (0.108 R)
• M27: 14,332,673 km (0.108 R)
• M28: 14,681,535 km (0.109 R)
• M29: 14,856,864 km (0.091 R)
• M30: 16,527,573 km (0.09 R)
• M31: 16,954,525 km (0.109 R)
• M32: 17,323,433 km (0.058 R)
• M33: 17,944,115 km (0.034 R)
• M34: 19,399,104 km (0.081 R)
• M35: 21,023,138 km (0.042 R)
• M36: 21,685,109 km (0.05 R)
• M37: 22,018,563 km (0.098 R)
• M38: 22,152,453 km (0.111 R)
• M39: 23,301,215 km (0.095 R)
• M40: 24,538,688 km (0.1 R)
• M41: 24,816,492 km (0.097 R)
• M42: 26,292,574 km (0.097 R)
• M43: 27,580,163 km (0.071 R)
• M44: 28,668,936 km (0.092 R)
• M45: 29,035,002 km (0.103 R)
• M46: 29,993,924 km (0.098 R)
• M47: 30,142,325 km (0.092 R)
• M48: 30,589,174 km (0.076 R)
• M49: 31,113,216 km (0.109 R)
• M50: 31,640,249 km (0.101 R)
• M51: 32,932,475 km (0.102 R)
• M52: 33,085,663 km (0.094 R)
• M53: 33,162,258 km (0.117 R)
• M54: 34,009,580 km (0.06 R)
• M55: 34,474,680 km (0.067 R)
• M56: 34,863,933 km (0.087 R)
• M57: 36,832,043 km (0.115 R)
• M58: 37,070,502 km (0.047 R)
• M59: 39,240,718 km (0.053 R)
• M60: 39,647,176 km (0.067 R)
• M61: 40,792,497 km (0.114 R)
• M62: 41,700,107 km (0.07 R)
• M63: 41,948,739 km (0.097 R)
• M64: 43,031,977 km (0.077 R)
• M65: 43,871,520 km (0.118 R)
• M66: 44,293,386 km (0.058 R)
• M67: 45,481,642 km (0.073 R)
• M68: 45,566,913 km (0.09 R)
• M69: 45,652,184 km (0.102 R)
• M70: 45,908,445 km (0.099 R)
• M71: 46,422,463 km (0.091 R)
• M72: 47,024,595 km (0.105 R)
• M73: 48,759,182 km (0.081 R)
• M74: 48,846,547 km (0.074 R)
• M75: 49,546,665 km (0.081 R)
• M76: 51,311,322 km (0.078 R)
• M77: 52,469,508 km (0.108 R)
• M78: 52,737,887 km (0.068 R)
• M79: 53,096,623 km (0.118 R)
• M80: 53,546,164 km (0.072 R)
• M81: 53,816,488 km (0.097 R)
• M82: 54,811,463 km (0.079 R)
• M83: 55,356,747 km (0.112 R)
• M84: 55,812,572 km (0.112 R)
• M85: 56,727,812 km (0.066 R)
• M86: 57,925,193 km (0.082 R)
• M87: 61,850,043 km (0.108 R)
• M88: 62,891,992 km (0.047 R)

Planet 6 - Ice Giant

Semi-Major Axis: 12.22 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 218.4

Radius: 4.1

Gravity: 12.99 G

Time & Orbit

Eccentricity (e): 0.08

Orbit Range: 11.24 AU - 13.2 AU

Year: 15842 Days

Day: 23.5 Hours

Environment

Temp: -182 °C

Axial Tilt: 32 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (65)

Outer Limit: 94,686,071 km

• M1: 58,343 km (0.109 R)
• M2: 720,613 km (0.062 R)
• M3: 856,597 km (0.097 R)
• M4: 1,113,906 km (0.064 R)
• M5: 1,171,950 km (0.119 R)
• M6: 1,373,159 km (0.057 R)
• M7: 1,414,597 km (0.095 R)
• M8: 1,498,971 km (0.118 R)
• M9: 2,354,521 km (0.117 R)
• M10: 2,505,166 km (0.095 R)
• M11: 2,659,102 km (0.104 R)
• M12: 3,473,812 km (0.1 R)
• M13: 4,575,301 km (0.091 R)
• M14: 5,244,453 km (0.104 R)
• M15: 5,573,867 km (0.046 R)
• M16: 5,740,968 km (0.096 R)
• M17: 5,909,864 km (0.08 R)
• M18: 5,943,823 km (0.094 R)
• M19: 6,849,488 km (0.074 R)
• M20: 8,902,120 km (0.059 R)
• M21: 9,176,034 km (0.04 R)
• M22: 9,611,962 km (0.12 R)
• M23: 10,586,593 km (0.074 R)
• M24: 11,338,023 km (0.102 R)
• M25: 11,848,451 km (0.078 R)
• M26: 11,977,254 km (0.114 R)
• M27: 12,671,837 km (0.068 R)
• M28: 12,803,483 km (0.029 R)
• M29: 14,694,400 km (0.061 R)
• M30: 15,296,981 km (0.112 R)
• M31: 15,766,120 km (0.099 R)
• M32: 15,860,516 km (0.073 R)
• M33: 17,689,200 km (0.08 R)
• M34: 17,885,473 km (0.081 R)
• M35: 19,330,438 km (0.065 R)
• M36: 21,488,537 km (0.105 R)
• M37: 21,803,142 km (0.093 R)
• M38: 22,489,646 km (0.104 R)
• M39: 22,755,631 km (0.071 R)
• M40: 25,085,618 km (0.105 R)
• M41: 25,916,036 km (0.114 R)
• M42: 26,027,486 km (0.112 R)
• M43: 26,306,636 km (0.049 R)
• M44: 26,586,833 km (0.097 R)
• M45: 27,093,670 km (0.069 R)
• M46: 28,002,627 km (0.034 R)
• M47: 28,174,216 km (0.108 R)
• M48: 28,633,332 km (0.086 R)
• M49: 28,806,117 km (0.11 R)
• M50: 30,259,760 km (0.074 R)
• M51: 30,965,862 km (0.092 R)
• M52: 31,321,007 km (0.083 R)
• M53: 32,454,510 km (0.045 R)
• M54: 32,935,617 km (0.106 R)
• M55: 34,149,005 km (0.116 R)
• M56: 36,058,472 km (0.069 R)
• M57: 36,619,315 km (0.073 R)
• M58: 36,744,379 km (0.086 R)
• M59: 38,002,347 km (0.085 R)
• M60: 39,530,489 km (0.042 R)
• M61: 41,013,752 km (0.104 R)
• M62: 41,208,529 km (0.03 R)
• M63: 41,925,402 km (0.107 R)
• M64: 42,449,443 km (0.114 R)
• M65: 42,909,606 km (0.072 R)

Planet 7 - Ice Giant

Semi-Major Axis: 17.97 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 661.6

Radius: 7.5

Gravity: 11.76 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 13.78 AU - 22.16 AU

Year: 28251 Days

Day: 21.4 Hours

Environment

Temp: -199 °C

Axial Tilt: 3.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 94,686,071 km

• M1: 202,406 km (0.063 R)
• M2: 584,778 km (0.09 R)
• M3: 821,741 km (0.053 R)
• M4: 878,588 km (0.056 R)
• M5: 1,182,721 km (0.099 R)
• M6: 1,247,497 km (0.072 R)
• M7: 1,660,836 km (0.116 R)
• M8: 1,920,837 km (0.12 R)
• M9: 2,647,284 km (0.099 R)
• M10: 2,732,854 km (0.097 R)
• M11: 4,578,293 km (0.066 R)
• M12: 4,733,277 km (0.105 R)
• M13: 4,889,906 km (0.068 R)
• M14: 5,208,399 km (0.069 R)
• M15: 5,754,282 km (0.089 R)
• M16: 6,433,157 km (0.055 R)
• M17: 6,548,796 km (0.083 R)
• M18: 7,803,923 km (0.091 R)
• M19: 8,937,426 km (0.046 R)
• M20: 9,721,468 km (0.112 R)
• M21: 9,987,603 km (0.105 R)
• M22: 10,391,517 km (0.12 R)
• M23: 10,800,667 km (0.079 R)
• M24: 11,145,640 km (0.104 R)
• M25: 11,215,053 km (0.102 R)
• M26: 11,705,136 km (0.12 R)
• M27: 12,273,907 km (0.09 R)
• M28: 12,924,358 km (0.032 R)
• M29: 13,143,669 km (0.091 R)
• M30: 14,183,524 km (0.045 R)
• M31: 16,341,174 km (0.106 R)
• M32: 19,679,899 km (0.083 R)
• M33: 22,251,486 km (0.068 R)
• M34: 23,933,864 km (0.073 R)
• M35: 24,293,348 km (0.056 R)
• M36: 24,383,406 km (0.1 R)
• M37: 26,116,946 km (0.061 R)
• M38: 28,457,704 km (0.096 R)
• M39: 29,604,970 km (0.119 R)
• M40: 29,990,783 km (0.074 R)
• M41: 30,767,345 km (0.04 R)
• M42: 30,864,883 km (0.113 R)
• M43: 32,637,917 km (0.044 R)
• M44: 34,140,628 km (0.096 R)
• M45: 35,256,927 km (0.085 R)
• M46: 37,005,427 km (0.092 R)
• M47: 37,317,039 km (0.116 R)
• M48: 38,992,984 km (0.05 R)
• M49: 39,946,371 km (0.109 R)
• M50: 40,693,314 km (0.118 R)
• M51: 41,660,314 km (0.092 R)
• M52: 43,726,710 km (0.098 R)
• M53: 44,276,033 km (0.114 R)
• M54: 44,496,391 km (0.114 R)
• M55: 44,717,048 km (0.068 R)
• M56: 44,827,600 km (0.112 R)
• M57: 47,506,749 km (0.118 R)
• M58: 47,958,385 km (0.1 R)
• M59: 48,752,001 km (0.077 R)
• M60: 49,207,377 km (0.113 R)
• M61: 49,664,249 km (0.096 R)
• M62: 51,274,371 km (0.102 R)
• M63: 51,853,614 km (0.062 R)
• M64: 52,085,939 km (0.107 R)
• M65: 53,604,208 km (0.12 R)
• M66: 55,018,506 km (0.086 R)
• M67: 58,004,330 km (0.082 R)
• M68: 59,456,028 km (0.09 R)
• M69: 61,902,103 km (0.044 R)
• M70: 62,518,745 km (0.048 R)
• M71: 62,766,031 km (0.1 R)
• M72: 65,883,650 km (0.109 R)
• M73: 66,639,419 km (0.078 R)
• M74: 67,144,760 km (0.09 R)
• M75: 69,307,048 km (0.056 R)
• M76: 70,075,532 km (0.099 R)
• M77: 72,527,890 km (0.112 R)
• M78: 72,657,741 km (0.066 R)
• M79: 72,917,742 km (0.062 R)
• M80: 73,438,492 km (0.095 R)
• M81: 73,699,391 km (0.115 R)
• M82: 73,960,439 km (0.03 R)
• M83: 74,221,936 km (0.109 R)
• M84: 74,483,733 km (0.097 R)
• M85: 75,008,223 km (0.117 R)
• M86: 76,589,023 km (0.068 R)
• M87: 76,721,268 km (0.113 R)
• M88: 76,853,662 km (0.059 R)
• M89: 79,381,866 km (0.098 R)
• M90: 84,929,703 km (0.107 R)
• M91: 85,889,373 km (0.03 R)
• M92: 87,681,107 km (0.098 R)
• M93: 89,067,580 km (0.077 R)
• M94: 90,042,510 km (0.091 R)

Kuiper Belt

Range: 30 - 45 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 419 - 11,896 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit