🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.28 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.55 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 526

Radius: 13.5

Gravity: 2.89 G

Time & Orbit

Eccentricity (e): 0.169

Orbit Range: 0.46 AU - 0.64 AU

Year: 282 Days

Day: 12.7 Hours

Environment

Temp: -139 °C

Axial Tilt: 6.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (35)

Outer Limit: 68,256,351 km

• M1: 185,202 km (0.083 R)
• M2: 287,378 km (0.106 R)
• M3: 394,190 km (0.083 R)
• M4: 487,839 km (0.109 R)
• M5: 586,274 km (0.066 R)
• M6: 678,277 km (0.096 R)
• M7: 772,972 km (0.062 R)
• M8: 882,777 km (0.085 R)
• M9: 977,772 km (0.1 R)
• M10: 1,062,145 km (0.12 R)
• M11: 1,167,911 km (0.096 R)
• M12: 1,296,714 km (0.069 R)
• M13: 1,414,747 km (0.102 R)
• M14: 1,503,608 km (0.078 R)
• M15: 1,594,564 km (0.111 R)
• M16: 1,769,444 km (0.097 R)
• M17: 1,857,108 km (0.049 R)
• M18: 1,950,756 km (0.101 R)
• M19: 2,041,562 km (0.054 R)
• M20: 2,189,963 km (0.076 R)
• M21: 2,308,445 km (0.075 R)
• M22: 2,424,233 km (0.097 R)
• M23: 2,581,910 km (0.116 R)
• M24: 2,667,031 km (0.071 R)
• M25: 2,794,039 km (0.07 R)
• M26: 2,881,704 km (0.079 R)
• M27: 2,975,352 km (0.081 R)
• M28: 3,171,475 km (0.109 R)
• M29: 3,344,410 km (0.067 R)
• M30: 3,454,215 km (0.064 R)
• M31: 3,626,851 km (0.071 R)
• M32: 3,722,743 km (0.094 R)
• M33: 3,808,014 km (0.093 R)
• M34: 3,917,220 km (0.071 R)
• M35: 4,021,490 km (0.109 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 667.3

Radius: 13.8

Gravity: 3.5 G

Time & Orbit

Eccentricity (e): 0.058

Orbit Range: 0.57 AU - 0.63 AU

Year: 321 Days

Day: 8.4 Hours

Environment

Temp: -150 °C

Axial Tilt: 47.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (32)

Outer Limit: 68,256,351 km

• M1: 172,337 km (0.098 R)
• M2: 304,880 km (0.084 R)
• M3: 426,952 km (0.072 R)
• M4: 521,947 km (0.076 R)
• M5: 668,553 km (0.097 R)
• M6: 774,319 km (0.091 R)
• M7: 860,637 km (0.093 R)
• M8: 962,363 km (0.072 R)
• M9: 1,195,885 km (0.098 R)
• M10: 1,293,872 km (0.101 R)
• M11: 1,412,802 km (0.076 R)
• M12: 1,498,821 km (0.051 R)
• M13: 1,591,273 km (0.115 R)
• M14: 1,700,329 km (0.069 R)
• M15: 1,787,545 km (0.089 R)
• M16: 1,891,216 km (0.09 R)
• M17: 2,053,231 km (0.076 R)
• M18: 2,146,580 km (0.102 R)
• M19: 2,246,661 km (0.077 R)
• M20: 2,612,577 km (0.055 R)
• M21: 2,794,189 km (0.083 R)
• M22: 2,880,806 km (0.062 R)
• M23: 2,968,321 km (0.118 R)
• M24: 3,056,733 km (0.105 R)
• M25: 3,164,145 km (0.099 R)
• M26: 3,315,388 km (0.04 R)
• M27: 3,537,541 km (0.101 R)
• M28: 3,809,510 km (0.076 R)
• M29: 4,200,409 km (0.066 R)
• M30: 4,353,747 km (0.116 R)
• M31: 4,468,339 km (0.072 R)
• M32: 4,645,612 km (0.073 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.08 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 610.2

Radius: 13.6

Gravity: 3.3 G

Time & Orbit

Eccentricity (e): 0.184

Orbit Range: 0.88 AU - 1.28 AU

Year: 775 Days

Day: 5.2 Hours

Environment

Temp: -184 °C

Axial Tilt: 35.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (48)

Outer Limit: 68,256,351 km

• M1: 171,140 km (0.114 R)
• M2: 277,953 km (0.101 R)
• M3: 409,599 km (0.093 R)
• M4: 514,766 km (0.101 R)
• M5: 641,476 km (0.09 R)
• M6: 765,193 km (0.085 R)
• M7: 948,151 km (0.062 R)
• M8: 1,334,114 km (0.092 R)
• M9: 1,465,012 km (0.025 R)
• M10: 1,593,517 km (0.066 R)
• M11: 1,740,122 km (0.086 R)
• M12: 1,847,833 km (0.099 R)
• M13: 1,980,077 km (0.105 R)
• M14: 2,108,133 km (0.117 R)
• M15: 2,356,765 km (0.105 R)
• M16: 2,517,134 km (0.088 R)
• M17: 2,623,498 km (0.089 R)
• M18: 2,739,735 km (0.056 R)
• M19: 2,840,714 km (0.116 R)
• M20: 3,142,602 km (0.096 R)
• M21: 3,284,272 km (0.079 R)
• M22: 3,473,363 km (0.11 R)
• M23: 3,564,618 km (0.069 R)
• M24: 3,656,920 km (0.11 R)
• M25: 3,862,617 km (0.045 R)
• M26: 4,024,183 km (0.057 R)
• M27: 4,139,672 km (0.091 R)
• M28: 4,314,851 km (0.068 R)
• M29: 4,452,930 km (0.108 R)
• M30: 4,774,266 km (0.07 R)
• M31: 4,937,627 km (0.032 R)
• M32: 5,238,768 km (0.119 R)
• M33: 5,492,635 km (0.115 R)
• M34: 5,578,056 km (0.085 R)
• M35: 5,783,005 km (0.117 R)
• M36: 5,957,586 km (0.07 R)
• M37: 6,133,812 km (0.117 R)
• M38: 6,233,743 km (0.117 R)
• M39: 6,514,239 km (0.06 R)
• M40: 6,707,370 km (0.116 R)
• M41: 6,902,446 km (0.08 R)
• M42: 7,134,322 km (0.112 R)
• M43: 7,522,679 km (0.061 R)
• M44: 7,677,512 km (0.044 R)
• M45: 7,773,405 km (0.119 R)
• M46: 8,014,856 km (0.041 R)
• M47: 8,221,899 km (0.057 R)
• M48: 8,307,768 km (0.09 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.44 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 139.2

Radius: 9.5

Gravity: 1.54 G

Time & Orbit

Eccentricity (e): 0.025

Orbit Range: 1.4 AU - 1.48 AU

Year: 1193 Days

Day: 10.1 Hours

Environment

Temp: -200 °C

Axial Tilt: 36.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 68,256,351 km

• M1: 125,812 km (0.051 R)
• M2: 219,310 km (0.073 R)
• M3: 290,369 km (0.044 R)
• M4: 418,276 km (0.119 R)
• M5: 504,145 km (0.116 R)
• M6: 652,097 km (0.079 R)
• M7: 843,882 km (0.047 R)
• M8: 917,035 km (0.065 R)
• M9: 997,519 km (0.06 R)
• M10: 1,101,788 km (0.086 R)
• M11: 1,226,254 km (0.077 R)
• M12: 1,543,401 km (0.072 R)
• M13: 1,905,578 km (0.083 R)
• M14: 2,225,268 km (0.039 R)
• M15: 2,342,703 km (0.072 R)
• M16: 2,412,714 km (0.114 R)
• M17: 2,692,612 km (0.032 R)
• M18: 3,112,832 km (0.086 R)
• M19: 3,370,290 km (0.09 R)
• M20: 3,667,093 km (0.033 R)
• M21: 4,115,587 km (0.119 R)
• M22: 4,415,680 km (0.104 R)
• M23: 4,785,187 km (0.073 R)
• M24: 4,982,806 km (0.096 R)
• M25: 5,100,839 km (0.034 R)
• M26: 5,302,646 km (0.076 R)
• M27: 5,404,522 km (0.092 R)
• M28: 5,469,747 km (0.085 R)
• M29: 5,667,067 km (0.109 R)
• M30: 6,136,355 km (0.118 R)
• M31: 6,321,707 km (0.096 R)
• M32: 6,390,372 km (0.062 R)
• M33: 6,748,061 km (0.096 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 812.9

Radius: 13.1

Gravity: 4.74 G

Time & Orbit

Eccentricity (e): 0.114

Orbit Range: 1.52 AU - 1.9 AU

Year: 1543 Days

Day: 9.1 Hours

Environment

Temp: -201 °C

Axial Tilt: 1.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (66)

Outer Limit: 68,256,351 km

• M1: 163,361 km (0.074 R)
• M2: 385,813 km (0.045 R)
• M3: 539,899 km (0.073 R)
• M4: 740,809 km (0.096 R)
• M5: 895,044 km (0.085 R)
• M6: 1,052,571 km (0.092 R)
• M7: 1,139,487 km (0.072 R)
• M8: 1,238,222 km (0.103 R)
• M9: 1,349,373 km (0.04 R)
• M10: 1,483,562 km (0.111 R)
• M11: 1,734,887 km (0.116 R)
• M12: 2,011,343 km (0.089 R)
• M13: 2,132,667 km (0.109 R)
• M14: 2,233,945 km (0.047 R)
• M15: 2,394,613 km (0.031 R)
• M16: 2,535,534 km (0.119 R)
• M17: 2,703,533 km (0.082 R)
• M18: 2,801,220 km (0.034 R)
• M19: 2,937,653 km (0.078 R)
• M20: 3,038,183 km (0.055 R)
• M21: 3,139,910 km (0.094 R)
• M22: 3,255,848 km (0.106 R)
• M23: 3,360,118 km (0.092 R)
• M24: 3,492,063 km (0.086 R)
• M25: 3,598,876 km (0.115 R)
• M26: 3,761,190 km (0.082 R)
• M27: 3,967,485 km (0.118 R)
• M28: 4,065,173 km (0.118 R)
• M29: 4,234,368 km (0.084 R)
• M30: 4,334,150 km (0.117 R)
• M31: 4,638,432 km (0.116 R)
• M32: 4,874,946 km (0.025 R)
• M33: 4,979,814 km (0.049 R)
• M34: 5,483,959 km (0.077 R)
• M35: 5,624,282 km (0.075 R)
• M36: 5,988,403 km (0.091 R)
• M37: 6,739,982 km (0.054 R)
• M38: 7,694,866 km (0.101 R)
• M39: 7,799,734 km (0.112 R)
• M40: 8,063,924 km (0.11 R)
• M41: 8,170,587 km (0.028 R)
• M42: 8,331,255 km (0.092 R)
• M43: 8,456,917 km (0.112 R)
• M44: 8,637,631 km (0.08 R)
• M45: 8,783,041 km (0.112 R)
• M46: 8,947,748 km (0.05 R)
• M47: 9,076,552 km (0.115 R)
• M48: 9,243,054 km (0.097 R)
• M49: 9,391,904 km (0.085 R)
• M50: 9,824,242 km (0.116 R)
• M51: 10,090,676 km (0.089 R)
• M52: 10,553,083 km (0.063 R)
• M53: 10,767,307 km (0.049 R)
• M54: 11,022,222 km (0.049 R)
• M55: 11,259,484 km (0.08 R)
• M56: 11,398,610 km (0.097 R)
• M57: 11,558,380 km (0.077 R)
• M58: 12,429,788 km (0.085 R)
• M59: 12,759,502 km (0.087 R)
• M60: 13,071,264 km (0.068 R)
• M61: 13,217,570 km (0.026 R)
• M62: 13,427,456 km (0.047 R)
• M63: 13,936,089 km (0.056 R)
• M64: 14,042,752 km (0.06 R)
• M65: 14,149,864 km (0.035 R)
• M66: 14,429,313 km (0.105 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 147

Radius: 14.3

Gravity: 0.72 G

Time & Orbit

Eccentricity (e): 0.107

Orbit Range: 1.77 AU - 2.19 AU

Year: 1923 Days

Day: 7.7 Hours

Environment

Temp: -205 °C

Axial Tilt: 37.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 68,256,351 km

• M1: 191,784 km (0.092 R)
• M2: 333,304 km (0.094 R)
• M3: 439,668 km (0.099 R)
• M4: 553,363 km (0.03 R)
• M5: 761,603 km (0.114 R)
• M6: 1,036,115 km (0.119 R)
• M7: 1,240,017 km (0.092 R)
• M8: 1,378,993 km (0.047 R)
• M9: 1,508,994 km (0.026 R)
• M10: 1,750,594 km (0.057 R)
• M11: 1,884,335 km (0.096 R)
• M12: 2,087,638 km (0.092 R)
• M13: 2,230,055 km (0.091 R)
• M14: 2,332,680 km (0.078 R)
• M15: 2,542,715 km (0.097 R)
• M16: 2,632,175 km (0.097 R)
• M17: 2,860,610 km (0.068 R)
• M18: 3,095,778 km (0.117 R)
• M19: 3,298,334 km (0.039 R)
• M20: 3,445,688 km (0.102 R)
• M21: 3,575,389 km (0.054 R)
• M22: 3,686,241 km (0.075 R)
• M23: 4,005,184 km (0.118 R)
• M24: 4,099,580 km (0.076 R)
• M25: 4,279,845 km (0.063 R)
• M26: 4,430,341 km (0.036 R)
• M27: 4,747,638 km (0.112 R)
• M28: 4,970,838 km (0.106 R)
• M29: 5,209,147 km (0.036 R)
• M30: 5,335,408 km (0.03 R)
• M31: 5,462,716 km (0.107 R)
• M32: 5,649,863 km (0.069 R)
• M33: 5,922,430 km (0.026 R)
• M34: 6,309,141 km (0.12 R)
• M35: 6,468,612 km (0.06 R)
• M36: 6,654,263 km (0.093 R)
• M37: 6,804,160 km (0.11 R)
• M38: 6,917,256 km (0.036 R)
• M39: 7,119,961 km (0.088 R)
• M40: 7,221,987 km (0.053 R)
• M41: 7,388,938 km (0.057 R)
• M42: 8,216,214 km (0.058 R)
• M43: 8,404,109 km (0.105 R)
• M44: 8,715,871 km (0.071 R)
• M45: 9,100,637 km (0.114 R)
• M46: 9,364,827 km (0.119 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 488.6

Radius: 14.7

Gravity: 2.26 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 4.54 AU - 5.22 AU

Year: 7441 Days

Day: 6.5 Hours

Environment

Temp: -223 °C

Axial Tilt: 31 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 68,256,351 km

• M1: 191,635 km (0.095 R)
• M2: 452,234 km (0.116 R)
• M3: 550,670 km (0.118 R)
• M4: 749,186 km (0.117 R)
• M5: 989,291 km (0.107 R)
• M6: 1,223,411 km (0.026 R)
• M7: 1,356,254 km (0.057 R)
• M8: 1,494,184 km (0.112 R)
• M9: 1,600,847 km (0.114 R)
• M10: 2,054,876 km (0.055 R)
• M11: 2,591,933 km (0.107 R)
• M12: 2,810,196 km (0.103 R)
• M13: 3,218,598 km (0.051 R)
• M14: 3,866,955 km (0.106 R)
• M15: 4,168,395 km (0.031 R)
• M16: 4,399,524 km (0.076 R)
• M17: 4,556,003 km (0.097 R)
• M18: 4,901,425 km (0.05 R)
• M19: 5,063,888 km (0.07 R)
• M20: 6,104,790 km (0.052 R)
• M21: 6,309,141 km (0.116 R)
• M22: 7,027,061 km (0.06 R)
• M23: 7,334,036 km (0.034 R)
• M24: 7,489,169 km (0.075 R)
• M25: 7,802,726 km (0.11 R)
• M26: 7,992,865 km (0.101 R)
• M27: 8,281,140 km (0.072 R)
• M28: 8,475,318 km (0.06 R)
• M29: 9,603,585 km (0.101 R)
• M30: 9,978,926 km (0.075 R)
• M31: 10,428,468 km (0.116 R)
• M32: 11,097,768 km (0.081 R)
• M33: 11,347,896 km (0.098 R)
• M34: 11,999,544 km (0.106 R)
• M35: 12,366,957 km (0.112 R)
• M36: 12,552,009 km (0.108 R)
• M37: 13,037,454 km (0.084 R)
• M38: 13,225,948 km (0.039 R)
• M39: 15,238,338 km (0.12 R)
• M40: 15,916,914 km (0.091 R)
• M41: 16,280,138 km (0.072 R)
• M42: 17,220,959 km (0.096 R)
• M43: 18,559,112 km (0.112 R)
• M44: 18,686,270 km (0.091 R)
• M45: 18,941,484 km (0.116 R)
• M46: 19,455,353 km (0.115 R)
• M47: 20,104,159 km (0.106 R)
• M48: 20,365,805 km (0.1 R)
• M49: 21,378,882 km (0.027 R)
• M50: 22,183,120 km (0.12 R)
• M51: 23,042,859 km (0.112 R)
• M52: 24,422,600 km (0.112 R)
• M53: 24,888,299 km (0.097 R)
• M54: 25,781,547 km (0.05 R)
• M55: 25,876,243 km (0.063 R)
• M56: 26,733,139 km (0.109 R)
• M57: 27,841,660 km (0.067 R)
• M58: 27,987,368 km (0.118 R)
• M59: 28,230,764 km (0.096 R)
• M60: 28,377,070 km (0.11 R)
• M61: 28,474,908 km (0.08 R)
• M62: 29,408,847 km (0.094 R)
• M63: 29,755,465 km (0.111 R)
• M64: 30,053,763 km (0.04 R)
• M65: 30,203,212 km (0.057 R)
• M66: 30,402,925 km (0.032 R)
• M67: 31,458,487 km (0.082 R)
• M68: 31,559,616 km (0.094 R)
• M69: 32,067,052 km (0.091 R)
• M70: 33,038,690 km (0.102 R)
• M71: 33,347,460 km (0.116 R)
• M72: 33,502,294 km (0.073 R)
• M73: 34,019,902 km (0.075 R)
• M74: 34,644,623 km (0.109 R)

Asteroid Belt

Center: 6.99 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 8 - Ice Giant

Semi-Major Axis: 9.1 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 550.9

Radius: 6.3

Gravity: 13.88 G

Time & Orbit

Eccentricity (e): 0.123

Orbit Range: 7.98 AU - 10.22 AU

Year: 18948 Days

Day: 15.8 Hours

Environment

Temp: -242 °C

Axial Tilt: 8.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 68,256,351 km

• M1: 331,808 km (0.087 R)
• M2: 397,781 km (0.101 R)
• M3: 544,087 km (0.052 R)
• M4: 1,314,068 km (0.094 R)
• M5: 4,279,097 km (0.1 R)
• M6: 4,773,070 km (0.115 R)
• M7: 4,899,330 km (0.118 R)
• M8: 5,459,425 km (0.104 R)
• M9: 5,503,406 km (0.1 R)
• M10: 6,360,153 km (0.04 R)
• M11: 8,754,467 km (0.098 R)
• M12: 9,064,883 km (0.048 R)
• M13: 9,221,512 km (0.092 R)
• M14: 9,379,039 km (0.098 R)
• M15: 13,120,631 km (0.116 R)
• M16: 13,594,856 km (0.094 R)
• M17: 13,714,235 km (0.099 R)
• M18: 14,256,079 km (0.081 R)
• M19: 15,672,172 km (0.098 R)
• M20: 16,747,332 km (0.043 R)
• M21: 17,846,128 km (0.079 R)
• M22: 17,911,503 km (0.031 R)
• M23: 17,977,027 km (0.107 R)
• M24: 19,977,000 km (0.118 R)
• M25: 20,727,832 km (0.086 R)
• M26: 21,210,435 km (0.07 R)
• M27: 21,279,699 km (0.078 R)
• M28: 21,487,939 km (0.063 R)
• M29: 22,327,482 km (0.081 R)
• M30: 23,966,327 km (0.105 R)
• M31: 24,110,689 km (0.114 R)
• M32: 24,545,420 km (0.091 R)
• M33: 24,690,829 km (0.099 R)
• M34: 24,763,684 km (0.107 R)
• M35: 27,660,347 km (0.104 R)
• M36: 28,420,155 km (0.077 R)
• M37: 28,725,933 km (0.098 R)
• M38: 29,495,315 km (0.097 R)
• M39: 30,427,609 km (0.027 R)
• M40: 31,211,801 km (0.059 R)
• M41: 31,448,315 km (0.092 R)
• M42: 32,560,126 km (0.092 R)
• M43: 33,846,369 km (0.109 R)
• M44: 35,313,325 km (0.104 R)
• M45: 35,971,855 km (0.079 R)
• M46: 36,468,371 km (0.096 R)
• M47: 37,552,207 km (0.069 R)
• M48: 37,719,906 km (0.115 R)
• M49: 38,731,038 km (0.116 R)
• M50: 39,070,177 km (0.054 R)
• M51: 41,211,521 km (0.108 R)
• M52: 41,384,456 km (0.066 R)
• M53: 45,071,744 km (0.086 R)
• M54: 45,428,236 km (0.063 R)
• M55: 45,875,384 km (0.092 R)
• M56: 46,683,811 km (0.079 R)
• M57: 47,406,368 km (0.12 R)
• M58: 47,859,800 km (0.052 R)
• M59: 49,872,190 km (0.092 R)
• M60: 53,318,327 km (0.074 R)
• M61: 54,262,888 km (0.055 R)
• M62: 54,832,257 km (0.084 R)
• M63: 58,872,896 km (0.114 R)
• M64: 59,165,060 km (0.104 R)
• M65: 59,457,823 km (0.034 R)
• M66: 59,848,872 km (0.105 R)
• M67: 61,323,159 km (0.098 R)
• M68: 62,312,450 km (0.105 R)
• M69: 63,307,126 km (0.095 R)
• M70: 63,506,690 km (0.095 R)
• M71: 64,909,469 km (0.06 R)
• M72: 65,211,507 km (0.087 R)
• M73: 66,120,015 km (0.103 R)
• M74: 66,322,570 km (0.111 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 504 - 18,490 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit