🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.16 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.08

Radius: 1.57

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.151

Orbit Range: 0.98 AU - 1.34 AU

Year: 570 Days

Day: 21.5 Hours

Environment

Temp: -98 °C

Axial Tilt: 166.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 83,176,194 km

• M1: 778,657 km (0.104 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.31 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.16

Radius: 1.06

Gravity: 1.03 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 1.22 AU - 1.4 AU

Year: 685 Days

Day: 26.5 Hours

Environment

Temp: -107 °C

Axial Tilt: 34.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 83,176,194 km

• M1: 243,695 km (0.091 R)

Planet 3 - Gas Giant

Semi-Major Axis: 5.28 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 379.2

Radius: 9

Gravity: 4.68 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 4.11 AU - 6.45 AU

Year: 5539 Days

Day: 11.9 Hours

Environment

Temp: -175 °C

Axial Tilt: 20.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 83,176,194 km

• M1: 142,417 km (0.077 R)
• M2: 284,984 km (0.098 R)
• M3: 434,432 km (0.102 R)
• M4: 500,405 km (0.099 R)
• M5: 601,533 km (0.115 R)
• M6: 813,812 km (0.103 R)
• M7: 1,011,282 km (0.03 R)
• M8: 1,210,696 km (0.05 R)
• M9: 1,481,767 km (0.107 R)
• M10: 1,756,279 km (0.065 R)
• M11: 1,915,900 km (0.086 R)
• M12: 1,981,125 km (0.07 R)
• M13: 2,164,382 km (0.088 R)
• M14: 2,249,503 km (0.036 R)
• M15: 2,335,821 km (0.045 R)
• M16: 2,858,217 km (0.067 R)
• M17: 3,495,803 km (0.097 R)
• M18: 3,575,988 km (0.113 R)
• M19: 4,218,810 km (0.115 R)
• M20: 4,919,376 km (0.116 R)
• M21: 5,054,762 km (0.079 R)
• M22: 5,214,383 km (0.108 R)
• M23: 5,352,462 km (0.109 R)
• M24: 5,538,562 km (0.108 R)
• M25: 5,893,109 km (0.052 R)
• M26: 6,774,091 km (0.112 R)
• M27: 7,410,031 km (0.095 R)
• M28: 8,171,335 km (0.1 R)
• M29: 8,820,290 km (0.071 R)
• M30: 8,957,621 km (0.065 R)
• M31: 9,345,678 km (0.104 R)
• M32: 9,739,420 km (0.026 R)
• M33: 10,340,205 km (0.105 R)
• M34: 10,426,972 km (0.042 R)
• M35: 11,427,632 km (0.051 R)
• M36: 11,697,656 km (0.048 R)
• M37: 12,736,613 km (0.034 R)
• M38: 13,047,777 km (0.111 R)
• M39: 13,110,309 km (0.081 R)
• M40: 13,487,744 km (0.097 R)
• M41: 13,741,312 km (0.093 R)
• M42: 14,188,760 km (0.077 R)
• M43: 14,511,442 km (0.085 R)
• M44: 14,836,518 km (0.118 R)
• M45: 15,131,077 km (0.116 R)
• M46: 15,196,750 km (0.112 R)
• M47: 15,626,395 km (0.092 R)
• M48: 15,759,388 km (0.082 R)
• M49: 17,384,320 km (0.051 R)
• M50: 17,453,135 km (0.056 R)
• M51: 18,042,102 km (0.079 R)
• M52: 18,391,562 km (0.114 R)
• M53: 18,602,346 km (0.116 R)
• M54: 19,061,910 km (0.114 R)
• M55: 19,919,854 km (0.089 R)
• M56: 20,136,322 km (0.116 R)
• M57: 20,353,538 km (0.114 R)
• M58: 21,083,426 km (0.069 R)
• M59: 21,599,389 km (0.065 R)
• M60: 21,970,542 km (0.091 R)
• M61: 22,306,389 km (0.105 R)
• M62: 22,531,085 km (0.061 R)
• M63: 23,134,264 km (0.066 R)
• M64: 23,399,949 km (0.096 R)
• M65: 23,742,828 km (0.119 R)
• M66: 24,510,863 km (0.108 R)
• M67: 24,781,635 km (0.057 R)
• M68: 24,975,664 km (0.027 R)
• M69: 25,053,305 km (0.066 R)
• M70: 25,482,352 km (0.107 R)
• M71: 25,795,909 km (0.102 R)
• M72: 26,545,693 km (0.101 R)

Planet 4 - Gas Giant

Semi-Major Axis: 5.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 725.6

Radius: 12.7

Gravity: 4.5 G

Time & Orbit

Eccentricity (e): 0.068

Orbit Range: 5.54 AU - 6.34 AU

Year: 6610 Days

Day: 10.9 Hours

Environment

Temp: -182 °C

Axial Tilt: 45.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 83,176,194 km

• M1: 206,445 km (0.04 R)
• M2: 349,760 km (0.065 R)
• M3: 464,352 km (0.115 R)
• M4: 583,132 km (0.094 R)
• M5: 673,639 km (0.089 R)
• M6: 871,108 km (0.119 R)
• M7: 993,330 km (0.103 R)
• M8: 1,221,915 km (0.082 R)
• M9: 1,504,805 km (0.079 R)
• M10: 1,673,402 km (0.069 R)
• M11: 1,928,466 km (0.119 R)
• M12: 2,030,043 km (0.07 R)
• M13: 2,367,386 km (0.073 R)
• M14: 2,520,724 km (0.119 R)
• M15: 2,677,353 km (0.116 R)
• M16: 2,930,323 km (0.095 R)
• M17: 3,435,216 km (0.099 R)
• M18: 3,634,779 km (0.108 R)
• M19: 4,390,548 km (0.115 R)
• M20: 4,855,947 km (0.074 R)
• M21: 5,052,219 km (0.104 R)
• M22: 5,598,401 km (0.068 R)
• M23: 6,103,294 km (0.07 R)
• M24: 6,560,764 km (0.115 R)
• M25: 6,840,811 km (0.095 R)
• M26: 6,934,908 km (0.039 R)
• M27: 7,220,192 km (0.097 R)
• M28: 7,380,261 km (0.12 R)
• M29: 7,704,141 km (0.11 R)
• M30: 8,132,140 km (0.102 R)
• M31: 8,805,779 km (0.091 R)
• M32: 8,942,811 km (0.07 R)
• M33: 9,218,670 km (0.072 R)
• M34: 9,427,508 km (0.096 R)
• M35: 9,992,091 km (0.082 R)
• M36: 10,170,710 km (0.11 R)
• M37: 10,314,474 km (0.11 R)
• M38: 10,422,783 km (0.053 R)
• M39: 11,154,017 km (0.091 R)
• M40: 12,550,364 km (0.09 R)
• M41: 12,937,224 km (0.069 R)
• M42: 13,446,006 km (0.073 R)
• M43: 14,201,326 km (0.057 R)
• M44: 15,422,194 km (0.095 R)
• M45: 15,961,644 km (0.083 R)
• M46: 16,128,894 km (0.114 R)
• M47: 16,212,669 km (0.114 R)
• M48: 16,549,414 km (0.046 R)
• M49: 17,101,729 km (0.112 R)
• M50: 18,882,842 km (0.04 R)
• M51: 19,415,260 km (0.106 R)
• M52: 20,087,852 km (0.096 R)
• M53: 20,722,447 km (0.079 R)
• M54: 20,904,956 km (0.119 R)
• M55: 20,996,360 km (0.034 R)
• M56: 21,271,620 km (0.082 R)
• M57: 21,548,077 km (0.11 R)
• M58: 21,918,332 km (0.083 R)
• M59: 22,104,432 km (0.089 R)
• M60: 22,477,978 km (0.073 R)
• M61: 23,516,037 km (0.061 R)
• M62: 23,897,362 km (0.106 R)
• M63: 24,184,740 km (0.066 R)
• M64: 25,443,157 km (0.106 R)
• M65: 25,736,518 km (0.027 R)
• M66: 25,932,791 km (0.106 R)
• M67: 27,170,713 km (0.117 R)
• M68: 27,872,327 km (0.106 R)
• M69: 28,073,836 km (0.034 R)
• M70: 28,986,831 km (0.08 R)
• M71: 29,600,931 km (0.073 R)
• M72: 31,259,522 km (0.104 R)
• M73: 31,364,091 km (0.103 R)
• M74: 31,889,180 km (0.057 R)
• M75: 32,152,771 km (0.108 R)
• M76: 32,629,240 km (0.107 R)
• M77: 33,696,172 km (0.113 R)
• M78: 34,126,117 km (0.063 R)
• M79: 34,287,832 km (0.113 R)
• M80: 34,774,474 km (0.114 R)
• M81: 36,193,260 km (0.06 R)
• M82: 36,413,169 km (0.057 R)

Planet 5 - Gas Giant

Semi-Major Axis: 7.26 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 383.2

Radius: 10.6

Gravity: 3.41 G

Time & Orbit

Eccentricity (e): 0.081

Orbit Range: 6.67 AU - 7.85 AU

Year: 8931 Days

Day: 8.5 Hours

Environment

Temp: -188 °C

Axial Tilt: 22.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 83,176,194 km

• M1: 168,298 km (0.098 R)
• M2: 293,810 km (0.049 R)
• M3: 412,890 km (0.101 R)
• M4: 577,149 km (0.106 R)
• M5: 866,471 km (0.092 R)
• M6: 1,004,550 km (0.049 R)
• M7: 1,084,585 km (0.027 R)
• M8: 1,166,863 km (0.115 R)
• M9: 1,303,297 km (0.094 R)
• M10: 1,706,164 km (0.07 R)
• M11: 1,783,655 km (0.119 R)
• M12: 1,942,080 km (0.088 R)
• M13: 2,252,046 km (0.054 R)
• M14: 2,965,479 km (0.085 R)
• M15: 3,593,939 km (0.113 R)
• M16: 4,970,240 km (0.096 R)
• M17: 5,309,079 km (0.099 R)
• M18: 5,713,891 km (0.07 R)
• M19: 5,802,004 km (0.118 R)
• M20: 6,249,152 km (0.083 R)
• M21: 6,400,694 km (0.069 R)
• M22: 6,492,248 km (0.107 R)
• M23: 7,303,518 km (0.026 R)
• M24: 7,591,942 km (0.07 R)
• M25: 7,851,345 km (0.111 R)
• M26: 8,312,555 km (0.094 R)
• M27: 9,261,006 km (0.077 R)
• M28: 9,608,222 km (0.117 R)
• M29: 9,748,246 km (0.108 R)
• M30: 10,315,222 km (0.114 R)
• M31: 10,856,467 km (0.088 R)
• M32: 11,296,135 km (0.074 R)
• M33: 12,382,814 km (0.103 R)
• M34: 12,573,551 km (0.084 R)
• M35: 12,688,443 km (0.049 R)
• M36: 13,229,239 km (0.113 R)
• M37: 13,817,159 km (0.108 R)
• M38: 13,896,146 km (0.07 R)
• M39: 14,213,742 km (0.093 R)
• M40: 14,493,640 km (0.098 R)
• M41: 14,977,739 km (0.08 R)
• M42: 15,099,661 km (0.065 R)
• M43: 15,221,883 km (0.109 R)
• M44: 16,377,975 km (0.079 R)
• M45: 16,797,896 km (0.059 R)
• M46: 16,882,269 km (0.085 R)
• M47: 17,391,500 km (0.052 R)
• M48: 17,776,715 km (0.092 R)
• M49: 19,125,340 km (0.058 R)
• M50: 19,345,997 km (0.082 R)
• M51: 19,878,864 km (0.08 R)
• M52: 20,147,093 km (0.087 R)
• M53: 20,732,470 km (0.099 R)
• M54: 21,735,823 km (0.104 R)
• M55: 22,243,408 km (0.099 R)
• M56: 22,615,009 km (0.07 R)
• M57: 22,801,558 km (0.101 R)
• M58: 23,552,988 km (0.061 R)
• M59: 23,789,502 km (0.118 R)
• M60: 24,026,764 km (0.068 R)
• M61: 24,455,961 km (0.08 R)
• M62: 24,983,742 km (0.114 R)
• M63: 25,080,233 km (0.048 R)
• M64: 26,295,416 km (0.098 R)
• M65: 27,778,978 km (0.025 R)
• M66: 29,086,613 km (0.104 R)
• M67: 29,238,754 km (0.094 R)
• M68: 29,442,058 km (0.083 R)
• M69: 29,543,934 km (0.117 R)
• M70: 29,747,985 km (0.1 R)
• M71: 29,901,323 km (0.106 R)
• M72: 30,106,123 km (0.075 R)
• M73: 30,930,108 km (0.069 R)
• M74: 31,137,301 km (0.093 R)
• M75: 31,292,883 km (0.092 R)
• M76: 31,448,913 km (0.059 R)
• M77: 31,553,033 km (0.096 R)
• M78: 31,709,363 km (0.075 R)
• M79: 32,653,026 km (0.116 R)
• M80: 33,446,344 km (0.053 R)
• M81: 34,032,169 km (0.074 R)
• M82: 34,299,650 km (0.116 R)
• M83: 34,406,762 km (0.119 R)
• M84: 35,810,140 km (0.11 R)
• M85: 35,973,202 km (0.116 R)
• M86: 36,464,032 km (0.112 R)

Planet 6 - Gas Giant

Semi-Major Axis: 8.4 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 617.5

Radius: 10.9

Gravity: 5.2 G

Time & Orbit

Eccentricity (e): 0.085

Orbit Range: 7.69 AU - 9.11 AU

Year: 11115 Days

Day: 14.6 Hours

Environment

Temp: -201 °C

Axial Tilt: 38.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 83,176,194 km

• M1: 158,574 km (0.112 R)
• M2: 235,766 km (0.095 R)
• M3: 562,039 km (0.053 R)
• M4: 656,585 km (0.05 R)
• M5: 1,033,572 km (0.04 R)
• M6: 1,133,054 km (0.108 R)
• M7: 1,320,351 km (0.078 R)
• M8: 1,407,118 km (0.075 R)
• M9: 1,495,829 km (0.102 R)
• M10: 2,731,059 km (0.093 R)
• M11: 2,899,805 km (0.118 R)
• M12: 3,608,600 km (0.069 R)
• M13: 4,046,323 km (0.072 R)
• M14: 4,701,113 km (0.056 R)
• M15: 5,040,850 km (0.067 R)
• M16: 5,109,814 km (0.066 R)
• M17: 5,816,365 km (0.055 R)
• M18: 6,441,086 km (0.059 R)
• M19: 7,164,541 km (0.096 R)
• M20: 7,320,273 km (0.096 R)
• M21: 7,873,785 km (0.105 R)
• M22: 8,481,750 km (0.058 R)
• M23: 9,486,001 km (0.061 R)
• M24: 10,176,395 km (0.095 R)
• M25: 10,704,775 km (0.101 R)
• M26: 10,838,366 km (0.117 R)
• M27: 11,559,727 km (0.116 R)
• M28: 12,018,394 km (0.113 R)
• M29: 12,157,221 km (0.046 R)
• M30: 13,382,427 km (0.07 R)
• M31: 13,478,319 km (0.109 R)
• M32: 13,767,342 km (0.048 R)
• M33: 14,155,848 km (0.087 R)
• M34: 14,498,876 km (0.09 R)
• M35: 15,242,976 km (0.053 R)
• M36: 15,644,945 km (0.1 R)
• M37: 16,254,407 km (0.073 R)
• M38: 17,027,230 km (0.073 R)
• M39: 17,235,320 km (0.088 R)
• M40: 17,444,309 km (0.114 R)
• M41: 18,076,210 km (0.115 R)
• M42: 18,448,260 km (0.059 R)
• M43: 18,715,591 km (0.039 R)
• M44: 18,930,414 km (0.117 R)
• M45: 19,038,124 km (0.087 R)
• M46: 19,199,989 km (0.112 R)
• M47: 20,401,559 km (0.098 R)
• M48: 20,789,018 km (0.109 R)
• M49: 21,740,011 km (0.092 R)
• M50: 22,306,090 km (0.028 R)
• M51: 22,819,659 km (0.103 R)
• M52: 23,279,523 km (0.112 R)
• M53: 28,104,354 km (0.059 R)
• M54: 28,658,913 km (0.102 R)
• M55: 32,126,143 km (0.063 R)
• M56: 32,835,386 km (0.069 R)
• M57: 33,029,714 km (0.055 R)
• M58: 33,354,491 km (0.091 R)
• M59: 33,549,716 km (0.039 R)
• M60: 34,861,839 km (0.084 R)
• M61: 35,126,178 km (0.05 R)
• M62: 35,923,385 km (0.063 R)
• M63: 36,525,218 km (0.052 R)
• M64: 36,995,703 km (0.104 R)
• M65: 37,130,491 km (0.082 R)
• M66: 39,446,415 km (0.107 R)
• M67: 40,830,644 km (0.101 R)
• M68: 41,039,633 km (0.082 R)
• M69: 41,318,782 km (0.049 R)
• M70: 43,078,053 km (0.057 R)
• M71: 43,432,899 km (0.116 R)
• M72: 43,860,001 km (0.054 R)
• M73: 44,073,926 km (0.116 R)
• M74: 44,646,437 km (0.097 R)
• M75: 46,524,040 km (0.083 R)
• M76: 46,596,745 km (0.047 R)
• M77: 47,033,870 km (0.115 R)
• M78: 48,132,816 km (0.103 R)
• M79: 48,574,728 km (0.09 R)
• M80: 48,796,133 km (0.118 R)
• M81: 48,870,034 km (0.082 R)
• M82: 48,943,935 km (0.071 R)
• M83: 49,388,391 km (0.075 R)
• M84: 49,610,992 km (0.12 R)
• M85: 49,685,342 km (0.09 R)

Planet 7 - Ice Giant

Semi-Major Axis: 14.17 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 603.5

Radius: 3.2

Gravity: 58.94 G

Time & Orbit

Eccentricity (e): 0.092

Orbit Range: 12.87 AU - 15.47 AU

Year: 24353 Days

Day: 23.9 Hours

Environment

Temp: -219 °C

Axial Tilt: 27 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 83,176,194 km

• M1: 88,412 km (0.106 R)
• M2: 163,062 km (0.06 R)
• M3: 192,532 km (0.097 R)
• M4: 408,701 km (0.062 R)
• M5: 450,439 km (0.116 R)
• M6: 704,905 km (0.113 R)
• M7: 941,569 km (0.096 R)
• M8: 1,112,111 km (0.119 R)
• M9: 1,385,875 km (0.089 R)
• M10: 2,474,050 km (0.075 R)
• M11: 3,072,890 km (0.113 R)
• M12: 3,155,917 km (0.039 R)
• M13: 3,366,999 km (0.048 R)
• M14: 3,802,479 km (0.107 R)
• M15: 4,209,385 km (0.099 R)
• M16: 4,821,390 km (0.101 R)
• M17: 5,211,541 km (0.101 R)
• M18: 5,460,621 km (0.085 R)
• M19: 7,643,703 km (0.076 R)
• M20: 9,390,109 km (0.072 R)
• M21: 10,369,526 km (0.06 R)
• M22: 10,871,427 km (0.112 R)
• M23: 11,963,641 km (0.097 R)
• M24: 12,029,015 km (0.086 R)
• M25: 12,357,383 km (0.096 R)
• M26: 12,622,320 km (0.119 R)
• M27: 12,956,073 km (0.11 R)
• M28: 13,360,436 km (0.111 R)
• M29: 13,632,256 km (0.079 R)
• M30: 14,948,268 km (0.074 R)
• M31: 18,523,508 km (0.06 R)
• M32: 19,591,188 km (0.087 R)
• M33: 20,835,692 km (0.102 R)
• M34: 21,071,758 km (0.109 R)
• M35: 21,546,881 km (0.075 R)
• M36: 23,727,569 km (0.04 R)
• M37: 25,723,952 km (0.107 R)
• M38: 25,808,325 km (0.093 R)
• M39: 26,061,894 km (0.08 R)
• M40: 30,052,417 km (0.105 R)
• M41: 30,141,129 km (0.096 R)
• M42: 30,408,310 km (0.083 R)
• M43: 30,676,091 km (0.043 R)
• M44: 31,394,011 km (0.045 R)
• M45: 31,664,783 km (0.047 R)
• M46: 33,213,270 km (0.103 R)
• M47: 34,972,691 km (0.104 R)
• M48: 35,346,985 km (0.116 R)
• M49: 35,816,722 km (0.099 R)
• M50: 36,005,216 km (0.114 R)
• M51: 36,477,795 km (0.106 R)
• M52: 37,142,907 km (0.077 R)
• M53: 37,907,951 km (0.117 R)
• M54: 38,003,843 km (0.032 R)
• M55: 38,678,081 km (0.085 R)
• M56: 39,356,208 km (0.102 R)
• M57: 39,453,446 km (0.077 R)
• M58: 39,550,685 km (0.092 R)
• M59: 40,038,374 km (0.061 R)
• M60: 40,233,899 km (0.116 R)
• M61: 40,429,872 km (0.1 R)
• M62: 41,019,437 km (0.115 R)
• M63: 41,512,960 km (0.046 R)
• M64: 41,611,845 km (0.089 R)
• M65: 42,306,727 km (0.077 R)
• M66: 43,707,711 km (0.086 R)
• M67: 44,312,834 km (0.108 R)
• M68: 46,144,660 km (0.066 R)
• M69: 46,760,704 km (0.117 R)
• M70: 48,312,932 km (0.087 R)
• M71: 50,725,347 km (0.109 R)
• M72: 51,149,008 km (0.1 R)
• M73: 54,038,491 km (0.098 R)
• M74: 55,775,621 km (0.093 R)
• M75: 56,431,758 km (0.107 R)
• M76: 56,760,723 km (0.094 R)
• M77: 56,980,483 km (0.083 R)
• M78: 58,304,723 km (0.061 R)
• M79: 58,637,279 km (0.083 R)
• M80: 59,638,986 km (0.07 R)
• M81: 59,974,086 km (0.108 R)
• M82: 62,791,163 km (0.113 R)
• M83: 65,190,563 km (0.083 R)
• M84: 67,619,883 km (0.076 R)
• M85: 69,490,455 km (0.091 R)
• M86: 72,804,796 km (0.085 R)
• M87: 74,240,935 km (0.106 R)
• M88: 74,721,743 km (0.056 R)
• M89: 76,776,619 km (0.117 R)
• M90: 76,898,093 km (0.088 R)
• M91: 78,360,412 km (0.107 R)
• M92: 79,095,087 km (0.096 R)
• M93: 80,201,363 km (0.112 R)
• M94: 80,941,574 km (0.075 R)
• M95: 82,429,025 km (0.084 R)
• M96: 82,802,421 km (0.092 R)

Kuiper Belt

Range: 30 - 46 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 172 - 12,668 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit