🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.63 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.61

Radius: 1.21

Gravity: 1.1 G

Time & Orbit

Eccentricity (e): 0.213

Orbit Range: 0.5 AU - 0.76 AU

Year: 191 Days

Day: 23.1 Hours

Environment

Temp: 142 °C

Axial Tilt: 31.7 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.42 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.49

Radius: 0.75

Gravity: 0.87 G

Time & Orbit

Eccentricity (e): 0.094

Orbit Range: 1.29 AU - 1.55 AU

Year: 648 Days

Day: 36.6 Hours

Environment

Temp: -58 °C

Axial Tilt: 26.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 1.82 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.5

Radius: 0.76

Gravity: 0.87 G

Time & Orbit

Eccentricity (e): 0.021

Orbit Range: 1.78 AU - 1.86 AU

Year: 940 Days

Day: 25.2 Hours

Environment

Temp: -81 °C

Axial Tilt: 20.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 48,523,040 km

• M1: 53,556 km (0.1 R)

Planet 4 - Gas Giant

Semi-Major Axis: 6.67 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 612.9

Radius: 14.9

Gravity: 2.76 G

Time & Orbit

Eccentricity (e): 0.241

Orbit Range: 5.06 AU - 8.28 AU

Year: 6596 Days

Day: 11.2 Hours

Environment

Temp: -171 °C

Axial Tilt: 28.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 48,523,040 km

• M1: 191,036 km (0.116 R)
• M2: 291,267 km (0.108 R)
• M3: 384,616 km (0.056 R)
• M4: 495,767 km (0.067 R)
• M5: 622,178 km (0.103 R)
• M6: 722,707 km (0.118 R)
• M7: 943,663 km (0.104 R)
• M8: 1,047,933 km (0.053 R)
• M9: 1,472,641 km (0.064 R)
• M10: 1,668,764 km (0.1 R)
• M11: 1,969,905 km (0.1 R)
• M12: 2,268,652 km (0.104 R)
• M13: 2,603,901 km (0.12 R)
• M14: 3,182,994 km (0.113 R)
• M15: 3,704,342 km (0.081 R)
• M16: 3,802,030 km (0.099 R)
• M17: 4,100,627 km (0.067 R)
• M18: 4,227,337 km (0.071 R)
• M19: 4,329,662 km (0.117 R)
• M20: 4,432,884 km (0.103 R)
• M21: 4,747,339 km (0.051 R)
• M22: 5,593,764 km (0.082 R)
• M23: 6,575,874 km (0.103 R)
• M24: 7,673,473 km (0.089 R)
• M25: 7,956,812 km (0.097 R)
• M26: 8,663,961 km (0.064 R)
• M27: 8,762,097 km (0.046 R)
• M28: 8,992,178 km (0.071 R)
• M29: 9,627,072 km (0.065 R)
• M30: 9,762,607 km (0.102 R)
• M31: 10,104,289 km (0.109 R)
• M32: 10,415,153 km (0.107 R)
• M33: 10,729,159 km (0.06 R)
• M34: 11,081,761 km (0.101 R)
• M35: 11,545,814 km (0.079 R)
• M36: 11,762,282 km (0.073 R)
• M37: 12,272,411 km (0.117 R)
• M38: 12,382,665 km (0.101 R)
• M39: 13,693,591 km (0.115 R)
• M40: 14,268,944 km (0.116 R)
• M41: 15,087,693 km (0.116 R)
• M42: 15,841,667 km (0.067 R)
• M43: 16,486,134 km (0.09 R)
• M44: 17,883,977 km (0.029 R)
• M45: 18,009,190 km (0.101 R)
• M46: 19,405,387 km (0.114 R)
• M47: 19,921,799 km (0.07 R)
• M48: 21,012,068 km (0.108 R)
• M49: 21,542,243 km (0.116 R)
• M50: 23,113,918 km (0.092 R)
• M51: 23,250,351 km (0.052 R)
• M52: 23,798,777 km (0.077 R)
• M53: 24,351,392 km (0.115 R)
• M54: 24,815,295 km (0.11 R)
• M55: 25,188,392 km (0.111 R)
• M56: 25,704,654 km (0.077 R)
• M57: 26,319,202 km (0.12 R)
• M58: 27,418,298 km (0.094 R)
• M59: 27,949,221 km (0.044 R)
• M60: 28,434,815 km (0.068 R)
• M61: 28,776,497 km (0.106 R)
• M62: 28,923,402 km (0.097 R)
• M63: 29,365,314 km (0.106 R)
• M64: 29,809,620 km (0.076 R)
• M65: 31,105,436 km (0.047 R)
• M66: 31,507,855 km (0.027 R)
• M67: 31,962,632 km (0.097 R)
• M68: 32,368,790 km (0.087 R)
• M69: 32,521,530 km (0.098 R)
• M70: 32,776,594 km (0.117 R)
• M71: 32,981,095 km (0.077 R)
• M72: 34,010,178 km (0.093 R)

Planet 5 - Gas Giant

Semi-Major Axis: 7.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 726.6

Radius: 8.6

Gravity: 9.82 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 6.37 AU - 8.49 AU

Year: 7754 Days

Day: 10.1 Hours

Environment

Temp: -176 °C

Axial Tilt: 7.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 48,523,040 km

• M1: 206,295 km (0.048 R)
• M2: 260,001 km (0.105 R)
• M3: 411,843 km (0.085 R)
• M4: 512,971 km (0.118 R)
• M5: 681,867 km (0.045 R)
• M6: 918,681 km (0.111 R)
• M7: 1,350,270 km (0.107 R)
• M8: 1,408,314 km (0.109 R)
• M9: 1,796,371 km (0.096 R)
• M10: 2,013,737 km (0.107 R)
• M11: 2,080,607 km (0.098 R)
• M12: 2,262,668 km (0.116 R)
• M13: 2,355,718 km (0.086 R)
• M14: 2,521,771 km (0.117 R)
• M15: 2,865,248 km (0.041 R)
• M16: 2,966,077 km (0.06 R)
• M17: 3,249,715 km (0.042 R)
• M18: 3,515,251 km (0.112 R)
• M19: 3,678,013 km (0.114 R)
• M20: 4,382,619 km (0.074 R)
• M21: 4,765,291 km (0.086 R)
• M22: 4,975,924 km (0.078 R)
• M23: 5,251,184 km (0.098 R)
• M24: 5,912,706 km (0.107 R)
• M25: 6,368,381 km (0.094 R)
• M26: 7,556,637 km (0.094 R)
• M27: 7,626,499 km (0.118 R)
• M28: 7,943,946 km (0.091 R)
• M29: 8,050,759 km (0.102 R)
• M30: 8,374,040 km (0.111 R)
• M31: 8,519,000 km (0.112 R)
• M32: 8,628,356 km (0.116 R)
• M33: 8,848,415 km (0.093 R)
• M34: 8,996,218 km (0.055 R)
• M35: 9,444,263 km (0.047 R)
• M36: 9,595,357 km (0.062 R)
• M37: 10,207,362 km (0.107 R)
• M38: 10,950,564 km (0.115 R)
• M39: 11,029,701 km (0.066 R)
• M40: 11,832,743 km (0.089 R)
• M41: 12,159,165 km (0.101 R)
• M42: 12,241,295 km (0.103 R)
• M43: 12,571,457 km (0.089 R)
• M44: 13,240,608 km (0.105 R)
• M45: 13,622,083 km (0.117 R)
• M46: 13,835,559 km (0.105 R)
• M47: 14,832,030 km (0.077 R)
• M48: 15,183,885 km (0.089 R)
• M49: 15,272,297 km (0.115 R)
• M50: 16,847,413 km (0.117 R)
• M51: 17,168,600 km (0.083 R)
• M52: 17,260,752 km (0.108 R)
• M53: 17,631,007 km (0.083 R)
• M54: 17,770,432 km (0.072 R)
• M55: 18,994,890 km (0.07 R)
• M56: 20,295,046 km (0.12 R)
• M57: 22,072,867 km (0.09 R)
• M58: 22,173,097 km (0.054 R)
• M59: 24,675,421 km (0.066 R)
• M60: 25,669,648 km (0.098 R)
• M61: 26,570,227 km (0.115 R)
• M62: 26,837,110 km (0.066 R)
• M63: 27,212,152 km (0.119 R)
• M64: 27,266,007 km (0.12 R)
• M65: 27,481,129 km (0.077 R)
• M66: 28,675,219 km (0.103 R)
• M67: 29,775,362 km (0.1 R)
• M68: 30,386,319 km (0.113 R)
• M69: 33,272,511 km (0.092 R)
• M70: 34,718,973 km (0.102 R)
• M71: 35,186,167 km (0.032 R)
• M72: 35,949,715 km (0.101 R)
• M73: 36,244,871 km (0.096 R)
• M74: 36,304,112 km (0.09 R)
• M75: 36,718,797 km (0.099 R)
• M76: 36,897,118 km (0.065 R)
• M77: 37,016,048 km (0.075 R)
• M78: 37,314,197 km (0.087 R)
• M79: 38,333,557 km (0.11 R)
• M80: 38,514,271 km (0.112 R)
• M81: 38,574,709 km (0.064 R)
• M82: 38,876,896 km (0.096 R)
• M83: 39,240,569 km (0.117 R)
• M84: 41,198,954 km (0.092 R)

Planet 6 - Gas Giant

Semi-Major Axis: 7.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 464.4

Radius: 14.9

Gravity: 2.09 G

Time & Orbit

Eccentricity (e): 0.134

Orbit Range: 6.68 AU - 8.74 AU

Year: 8197 Days

Day: 11.4 Hours

Environment

Temp: -171 °C

Axial Tilt: 34.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 48,523,040 km

• M1: 227,688 km (0.074 R)
• M2: 375,939 km (0.042 R)
• M3: 478,863 km (0.115 R)
• M4: 671,545 km (0.102 R)
• M5: 779,405 km (0.072 R)
• M6: 1,031,178 km (0.079 R)
• M7: 1,293,872 km (0.066 R)
• M8: 1,672,803 km (0.117 R)
• M9: 1,945,072 km (0.086 R)
• M10: 2,046,050 km (0.055 R)
• M11: 2,190,562 km (0.091 R)
• M12: 2,712,209 km (0.061 R)
• M13: 2,917,906 km (0.117 R)
• M14: 3,248,368 km (0.109 R)
• M15: 3,616,229 km (0.078 R)
• M16: 3,946,093 km (0.03 R)
• M17: 4,127,854 km (0.116 R)
• M18: 4,446,049 km (0.089 R)
• M19: 4,799,848 km (0.084 R)
• M20: 4,910,550 km (0.082 R)
• M21: 5,333,613 km (0.092 R)
• M22: 5,856,906 km (0.106 R)
• M23: 6,005,158 km (0.071 R)
• M24: 6,859,062 km (0.116 R)
• M25: 6,952,860 km (0.086 R)
• M26: 8,012,612 km (0.028 R)
• M27: 8,111,496 km (0.057 R)
• M28: 8,917,230 km (0.076 R)
• M29: 9,295,114 km (0.114 R)
• M30: 9,854,161 km (0.048 R)
• M31: 10,244,911 km (0.058 R)
• M32: 11,005,167 km (0.08 R)
• M33: 11,410,578 km (0.104 R)
• M34: 11,559,278 km (0.116 R)
• M35: 11,896,172 km (0.106 R)
• M36: 12,312,354 km (0.063 R)
• M37: 12,694,875 km (0.112 R)
• M38: 13,081,436 km (0.105 R)
• M39: 13,276,063 km (0.045 R)
• M40: 13,707,802 km (0.101 R)
• M41: 13,905,571 km (0.071 R)
• M42: 14,184,122 km (0.05 R)
• M43: 14,424,376 km (0.099 R)
• M44: 14,706,368 km (0.071 R)
• M45: 14,868,233 km (0.12 R)
• M46: 16,226,881 km (0.118 R)
• M47: 17,069,566 km (0.114 R)
• M48: 17,282,593 km (0.062 R)
• M49: 17,797,060 km (0.117 R)
• M50: 18,056,313 km (0.117 R)
• M51: 18,491,194 km (0.09 R)
• M52: 18,666,074 km (0.109 R)
• M53: 18,885,385 km (0.066 R)
• M54: 19,194,005 km (0.097 R)
• M55: 19,771,603 km (0.109 R)
• M56: 20,040,131 km (0.105 R)
• M57: 20,219,798 km (0.099 R)
• M58: 20,354,885 km (0.054 R)
• M59: 21,080,584 km (0.119 R)
• M60: 21,217,616 km (0.102 R)
• M61: 21,861,036 km (0.085 R)
• M62: 22,557,414 km (0.093 R)
• M63: 22,744,411 km (0.045 R)
• M64: 24,210,770 km (0.088 R)
• M65: 24,594,040 km (0.108 R)
• M66: 24,738,401 km (0.098 R)
• M67: 26,787,892 km (0.036 R)
• M68: 27,035,477 km (0.097 R)
• M69: 28,992,965 km (0.076 R)
• M70: 29,247,281 km (0.105 R)
• M71: 29,758,008 km (0.068 R)
• M72: 30,840,199 km (0.081 R)
• M73: 30,943,871 km (0.039 R)
• M74: 31,047,692 km (0.114 R)
• M75: 32,303,117 km (0.119 R)
• M76: 32,513,900 km (0.062 R)
• M77: 32,778,090 km (0.109 R)
• M78: 32,884,006 km (0.08 R)
• M79: 33,468,335 km (0.083 R)
• M80: 34,002,549 km (0.081 R)
• M81: 34,755,325 km (0.102 R)
• M82: 35,133,658 km (0.113 R)
• M83: 36,058,323 km (0.097 R)

Planet 7 - Gas Giant

Semi-Major Axis: 8.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 172.4

Radius: 10.5

Gravity: 1.56 G

Time & Orbit

Eccentricity (e): 0.113

Orbit Range: 7.57 AU - 9.51 AU

Year: 9556 Days

Day: 9.7 Hours

Environment

Temp: -186 °C

Axial Tilt: 31.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 48,523,040 km

• M1: 201,209 km (0.103 R)
• M2: 274,961 km (0.083 R)
• M3: 467,194 km (0.101 R)
• M4: 804,388 km (0.07 R)
• M5: 1,068,727 km (0.101 R)
• M6: 1,360,892 km (0.089 R)
• M7: 1,437,935 km (0.094 R)
• M8: 1,966,314 km (0.084 R)
• M9: 2,054,128 km (0.109 R)
• M10: 2,125,337 km (0.075 R)
• M11: 2,270,447 km (0.034 R)
• M12: 2,608,837 km (0.086 R)
• M13: 2,725,374 km (0.118 R)
• M14: 2,803,913 km (0.115 R)
• M15: 2,903,395 km (0.042 R)
• M16: 3,064,812 km (0.097 R)
• M17: 3,460,348 km (0.083 R)
• M18: 3,961,052 km (0.107 R)
• M19: 4,072,952 km (0.111 R)
• M20: 4,391,894 km (0.054 R)
• M21: 4,671,642 km (0.116 R)
• M22: 5,273,475 km (0.111 R)
• M23: 5,372,060 km (0.093 R)
• M24: 5,446,410 km (0.081 R)
• M25: 5,899,841 km (0.1 R)
• M26: 6,260,820 km (0.088 R)
• M27: 6,629,130 km (0.063 R)
• M28: 6,762,422 km (0.07 R)
• M29: 7,058,776 km (0.053 R)
• M30: 7,359,318 km (0.071 R)
• M31: 8,001,392 km (0.115 R)
• M32: 8,114,936 km (0.108 R)
• M33: 8,257,653 km (0.12 R)
• M34: 8,632,396 km (0.103 R)
• M35: 8,924,560 km (0.091 R)
• M36: 9,279,406 km (0.084 R)
• M37: 9,488,694 km (0.101 R)
• M38: 9,790,133 km (0.071 R)
• M39: 10,340,953 km (0.081 R)
• M40: 11,376,619 km (0.086 R)
• M41: 11,664,894 km (0.11 R)
• M42: 11,890,637 km (0.096 R)
• M43: 12,150,638 km (0.063 R)
• M44: 12,379,523 km (0.089 R)
• M45: 12,576,992 km (0.078 R)
• M46: 13,343,232 km (0.056 R)
• M47: 13,444,361 km (0.056 R)
• M48: 14,955,898 km (0.087 R)
• M49: 15,131,077 km (0.085 R)
• M50: 15,236,394 km (0.079 R)
• M51: 15,731,712 km (0.112 R)
• M52: 15,874,129 km (0.041 R)
• M53: 16,304,223 km (0.04 R)
• M54: 16,665,502 km (0.068 R)
• M55: 17,212,432 km (0.105 R)
• M56: 17,617,094 km (0.11 R)
• M57: 18,099,547 km (0.06 R)
• M58: 18,473,691 km (0.091 R)
• M59: 18,624,037 km (0.087 R)
• M60: 18,812,531 km (0.115 R)
• M61: 19,420,048 km (0.036 R)
• M62: 19,841,465 km (0.113 R)
• M63: 19,995,551 km (0.069 R)
• M64: 20,188,532 km (0.036 R)
• M65: 20,810,410 km (0.093 R)
• M66: 21,438,721 km (0.081 R)
• M67: 22,272,729 km (0.118 R)
• M68: 22,713,744 km (0.062 R)
• M69: 23,401,146 km (0.102 R)
• M70: 23,563,909 km (0.1 R)
• M71: 24,920,761 km (0.045 R)
• M72: 25,839,292 km (0.026 R)
• M73: 26,049,627 km (0.045 R)
• M74: 26,429,755 km (0.06 R)
• M75: 26,811,529 km (0.093 R)
• M76: 27,666,630 km (0.105 R)
• M77: 27,881,902 km (0.081 R)
• M78: 28,357,174 km (0.1 R)
• M79: 28,530,708 km (0.062 R)
• M80: 28,835,289 km (0.078 R)

Planet 8 - Ice Giant

Semi-Major Axis: 13.91 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 180.1

Radius: 7.4

Gravity: 3.29 G

Time & Orbit

Eccentricity (e): 0.133

Orbit Range: 12.06 AU - 15.76 AU

Year: 19864 Days

Day: 20.2 Hours

Environment

Temp: -189 °C

Axial Tilt: 16.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 48,523,040 km

• M1: 395,686 km (0.069 R)
• M2: 649,853 km (0.03 R)
• M3: 821,741 km (0.111 R)
• M4: 1,066,932 km (0.099 R)
• M5: 1,646,624 km (0.102 R)
• M6: 2,080,158 km (0.079 R)
• M7: 2,335,971 km (0.094 R)
• M8: 2,683,487 km (0.107 R)
• M9: 2,793,890 km (0.085 R)
• M10: 2,849,540 km (0.086 R)
• M11: 3,397,218 km (0.099 R)
• M12: 4,166,600 km (0.08 R)
• M13: 4,456,371 km (0.099 R)
• M14: 4,987,743 km (0.083 R)
• M15: 5,123,727 km (0.092 R)
• M16: 5,192,093 km (0.115 R)
• M17: 5,330,023 km (0.025 R)
• M18: 5,786,296 km (0.108 R)
• M19: 6,255,136 km (0.112 R)
• M20: 6,475,793 km (0.109 R)
• M21: 6,924,437 km (0.096 R)
• M22: 7,383,253 km (0.116 R)
• M23: 7,851,943 km (0.1 R)
• M24: 7,970,575 km (0.036 R)
• M25: 8,050,011 km (0.107 R)
• M26: 8,209,782 km (0.086 R)
• M27: 8,532,315 km (0.118 R)
• M28: 8,654,237 km (0.033 R)
• M29: 8,776,907 km (0.102 R)
• M30: 9,106,770 km (0.07 R)
• M31: 11,124,846 km (0.06 R)
• M32: 11,347,447 km (0.086 R)
• M33: 11,842,317 km (0.11 R)
• M34: 12,667,200 km (0.099 R)
• M35: 12,806,475 km (0.079 R)
• M36: 13,086,672 km (0.053 R)
• M37: 14,227,206 km (0.077 R)
• M38: 14,517,426 km (0.103 R)
• M39: 14,858,360 km (0.091 R)
• M40: 15,103,401 km (0.103 R)
• M41: 15,498,489 km (0.087 R)
• M42: 15,548,155 km (0.045 R)
• M43: 15,597,822 km (0.081 R)
• M44: 15,747,121 km (0.069 R)
• M45: 16,198,009 km (0.089 R)
• M46: 17,112,351 km (0.116 R)
• M47: 17,783,148 km (0.102 R)
• M48: 18,043,448 km (0.114 R)
• M49: 18,304,945 km (0.034 R)
• M50: 18,620,447 km (0.069 R)
• M51: 18,937,744 km (0.081 R)
• M52: 19,631,429 km (0.116 R)
• M53: 19,685,135 km (0.09 R)
• M54: 20,062,421 km (0.059 R)
• M55: 20,442,250 km (0.111 R)
• M56: 20,769,570 km (0.096 R)
• M57: 20,879,076 km (0.108 R)
• M58: 22,152,004 km (0.096 R)
• M59: 22,826,242 km (0.116 R)
• M60: 23,222,526 km (0.111 R)
• M61: 23,393,068 km (0.071 R)
• M62: 23,678,351 km (0.053 R)
• M63: 23,792,644 km (0.084 R)
• M64: 25,824,332 km (0.087 R)
• M65: 26,119,190 km (0.094 R)
• M66: 26,652,506 km (0.086 R)
• M67: 27,669,772 km (0.115 R)
• M68: 27,910,924 km (0.07 R)
• M69: 28,456,208 km (0.109 R)
• M70: 28,821,675 km (0.106 R)
• M71: 29,127,453 km (0.08 R)
• M72: 29,803,785 km (0.085 R)
• M73: 30,859,348 km (0.113 R)
• M74: 32,243,427 km (0.086 R)
• M75: 32,688,182 km (0.101 R)
• M76: 32,943,097 km (0.086 R)
• M77: 35,660,093 km (0.076 R)
• M78: 36,251,603 km (0.033 R)
• M79: 37,045,370 km (0.031 R)
• M80: 38,852,063 km (0.09 R)
• M81: 39,936,199 km (0.08 R)
• M82: 40,550,448 km (0.087 R)
• M83: 41,099,023 km (0.109 R)
• M84: 41,581,027 km (0.096 R)
• M85: 43,387,870 km (0.062 R)
• M86: 43,597,906 km (0.108 R)
• M87: 44,441,787 km (0.103 R)
• M88: 44,653,618 km (0.072 R)
• M89: 45,646,499 km (0.114 R)
• M90: 45,717,558 km (0.116 R)
• M91: 46,861,832 km (0.107 R)
• M92: 48,522,967 km (0.092 R)

Kuiper Belt

Range: 30 - 58 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 417 - 17,015 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit