🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 2.17 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.86

Radius: 1.52

Gravity: 1.24 G

Time & Orbit

Eccentricity (e): 0.084

Orbit Range: 1.99 AU - 2.35 AU

Year: 1179 Days

Day: 20.1 Hours

Environment

Temp: -72 °C

Axial Tilt: 35.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 68,042,312 km

• M1: 917,933 km (0.103 R)

Planet 2 - Terrestrial

Semi-Major Axis: 2.87 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.74

Radius: 1.69

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 2.41 AU - 3.33 AU

Year: 1794 Days

Day: 19.7 Hours

Environment

Temp: -93 °C

Axial Tilt: 45.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 2.88 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.5

Radius: 0.76

Gravity: 0.87 G

Time & Orbit

Eccentricity (e): 0.096

Orbit Range: 2.6 AU - 3.16 AU

Year: 1803 Days

Day: 23 Hours

Environment

Temp: -93 °C

Axial Tilt: 4.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 68,042,312 km

• M1: 781,948 km (0.039 R)

Planet 4 - Terrestrial

Semi-Major Axis: 4.61 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.72

Radius: 1.24

Gravity: 1.12 G

Time & Orbit

Eccentricity (e): 0.217

Orbit Range: 3.61 AU - 5.61 AU

Year: 3652 Days

Day: 29.6 Hours

Environment

Temp: -146 °C

Axial Tilt: 23.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Gas Giant

Semi-Major Axis: 5.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 559.5

Radius: 8

Gravity: 8.74 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 4.06 AU - 6.16 AU

Year: 4262 Days

Day: 13 Hours

Environment

Temp: -137 °C

Axial Tilt: 25.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 68,042,312 km

• M1: 165,754 km (0.066 R)
• M2: 279,449 km (0.069 R)
• M3: 660,774 km (0.108 R)
• M4: 793,318 km (0.089 R)
• M5: 910,752 km (0.118 R)
• M6: 1,059,602 km (0.107 R)
• M7: 1,325,437 km (0.035 R)
• M8: 1,495,081 km (0.114 R)
• M9: 1,627,026 km (0.049 R)
• M10: 1,793,529 km (0.029 R)
• M11: 2,292,737 km (0.099 R)
• M12: 2,479,884 km (0.089 R)
• M13: 3,202,292 km (0.092 R)
• M14: 3,606,206 km (0.093 R)
• M15: 4,046,772 km (0.095 R)
• M16: 4,336,094 km (0.108 R)
• M17: 4,419,869 km (0.045 R)
• M18: 4,696,326 km (0.071 R)
• M19: 4,782,494 km (0.102 R)
• M20: 4,978,468 km (0.105 R)
• M21: 5,066,281 km (0.099 R)
• M22: 5,221,414 km (0.08 R)
• M23: 5,288,285 km (0.103 R)
• M24: 5,423,072 km (0.106 R)
• M25: 5,811,129 km (0.116 R)
• M26: 5,903,730 km (0.066 R)
• M27: 6,302,857 km (0.085 R)
• M28: 6,589,936 km (0.115 R)
• M29: 7,102,458 km (0.052 R)
• M30: 8,010,966 km (0.091 R)
• M31: 8,243,740 km (0.04 R)
• M32: 8,875,492 km (0.033 R)
• M33: 9,089,417 km (0.049 R)
• M34: 9,604,632 km (0.081 R)
• M35: 9,907,269 km (0.105 R)
• M36: 10,409,169 km (0.117 R)
• M37: 11,062,613 km (0.078 R)
• M38: 11,437,804 km (0.086 R)
• M39: 12,828,915 km (0.105 R)
• M40: 13,040,596 km (0.113 R)
• M41: 13,498,216 km (0.102 R)
• M42: 13,682,820 km (0.115 R)
• M43: 13,930,105 km (0.05 R)
• M44: 14,085,537 km (0.06 R)
• M45: 14,335,216 km (0.117 R)
• M46: 15,029,500 km (0.067 R)
• M47: 15,188,971 km (0.112 R)
• M48: 15,316,728 km (0.048 R)
• M49: 15,541,424 km (0.11 R)
• M50: 15,702,540 km (0.109 R)
• M51: 16,385,305 km (0.116 R)
• M52: 16,450,829 km (0.095 R)
• M53: 16,516,503 km (0.071 R)
• M54: 16,647,999 km (0.089 R)
• M55: 17,948,453 km (0.094 R)
• M56: 18,253,184 km (0.12 R)
• M57: 18,321,102 km (0.053 R)
• M58: 18,423,127 km (0.081 R)
• M59: 18,902,140 km (0.083 R)
• M60: 19,593,282 km (0.112 R)
• M61: 20,222,491 km (0.101 R)
• M62: 20,858,282 km (0.11 R)
• M63: 21,107,362 km (0.097 R)
• M64: 22,185,813 km (0.082 R)
• M65: 23,799,675 km (0.032 R)
• M66: 24,470,771 km (0.102 R)
• M67: 24,808,563 km (0.102 R)
• M68: 25,148,000 km (0.106 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.24 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 651.3

Radius: 8.6

Gravity: 8.81 G

Time & Orbit

Eccentricity (e): 0.227

Orbit Range: 4.82 AU - 7.66 AU

Year: 5751 Days

Day: 8.4 Hours

Environment

Temp: -151 °C

Axial Tilt: 19.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 68,042,312 km

• M1: 108,010 km (0.093 R)
• M2: 275,709 km (0.113 R)
• M3: 503,397 km (0.119 R)
• M4: 596,447 km (0.076 R)
• M5: 695,780 km (0.094 R)
• M6: 787,633 km (0.086 R)
• M7: 969,544 km (0.059 R)
• M8: 1,340,995 km (0.087 R)
• M9: 1,407,118 km (0.06 R)
• M10: 1,808,788 km (0.092 R)
• M11: 1,938,040 km (0.106 R)
• M12: 2,166,776 km (0.104 R)
• M13: 2,284,509 km (0.043 R)
• M14: 2,364,095 km (0.037 R)
• M15: 2,629,482 km (0.034 R)
• M16: 2,947,676 km (0.115 R)
• M17: 3,012,901 km (0.09 R)
• M18: 3,078,575 km (0.089 R)
• M19: 3,211,268 km (0.074 R)
• M20: 3,278,288 km (0.092 R)
• M21: 3,690,579 km (0.085 R)
• M22: 4,046,922 km (0.075 R)
• M23: 4,290,617 km (0.097 R)
• M24: 4,665,060 km (0.055 R)
• M25: 4,972,334 km (0.076 R)
• M26: 5,128,365 km (0.093 R)
• M27: 5,259,712 km (0.11 R)
• M28: 5,445,512 km (0.108 R)
• M29: 6,154,307 km (0.042 R)
• M30: 6,548,048 km (0.11 R)
• M31: 6,604,896 km (0.045 R)
• M32: 6,920,996 km (0.066 R)
• M33: 8,050,310 km (0.108 R)
• M34: 8,573,903 km (0.112 R)
• M35: 9,013,421 km (0.105 R)
• M36: 9,396,093 km (0.097 R)
• M37: 9,653,999 km (0.098 R)
• M38: 9,914,449 km (0.118 R)
• M39: 10,243,116 km (0.117 R)
• M40: 10,675,902 km (0.113 R)
• M41: 10,843,901 km (0.03 R)
• M42: 11,114,523 km (0.078 R)
• M43: 11,628,093 km (0.119 R)
• M44: 11,731,764 km (0.071 R)
• M45: 12,219,453 km (0.119 R)
• M46: 12,289,615 km (0.041 R)
• M47: 13,758,516 km (0.12 R)
• M48: 14,051,578 km (0.087 R)
• M49: 14,420,786 km (0.078 R)
• M50: 15,018,280 km (0.068 R)
• M51: 15,699,997 km (0.107 R)
• M52: 16,663,557 km (0.071 R)
• M53: 17,132,846 km (0.082 R)
• M54: 17,805,139 km (0.093 R)
• M55: 17,964,610 km (0.117 R)
• M56: 18,890,471 km (0.103 R)
• M57: 20,704,944 km (0.078 R)
• M58: 21,675,235 km (0.098 R)
• M59: 21,802,992 km (0.061 R)
• M60: 22,016,319 km (0.036 R)
• M61: 22,401,982 km (0.047 R)
• M62: 22,746,805 km (0.105 R)
• M63: 23,572,585 km (0.103 R)
• M64: 23,835,429 km (0.082 R)
• M65: 24,896,526 km (0.109 R)
• M66: 25,030,267 km (0.103 R)
• M67: 25,522,594 km (0.067 R)
• M68: 25,747,439 km (0.101 R)
• M69: 26,562,299 km (0.113 R)
• M70: 27,339,759 km (0.115 R)
• M71: 28,543,124 km (0.045 R)
• M72: 28,636,324 km (0.062 R)
• M73: 29,104,266 km (0.079 R)
• M74: 29,245,187 km (0.076 R)
• M75: 29,574,751 km (0.117 R)
• M76: 29,810,966 km (0.059 R)
• M77: 30,000,357 km (0.12 R)
• M78: 31,626,336 km (0.116 R)
• M79: 32,255,545 km (0.116 R)
• M80: 32,450,022 km (0.105 R)

Planet 7 - Gas Giant

Semi-Major Axis: 6.49 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 894.7

Radius: 14.4

Gravity: 4.31 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 5.06 AU - 7.92 AU

Year: 6100 Days

Day: 13.1 Hours

Environment

Temp: -164 °C

Axial Tilt: 37.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 68,042,312 km

• M1: 269,725 km (0.109 R)
• M2: 479,162 km (0.115 R)
• M3: 573,558 km (0.099 R)
• M4: 903,721 km (0.035 R)
• M5: 1,510,340 km (0.069 R)
• M6: 1,916,947 km (0.093 R)
• M7: 2,018,973 km (0.071 R)
• M8: 2,122,794 km (0.106 R)
• M9: 2,250,102 km (0.113 R)
• M10: 2,579,516 km (0.098 R)
• M11: 2,831,289 km (0.078 R)
• M12: 3,433,720 km (0.057 R)
• M13: 3,609,647 km (0.098 R)
• M14: 3,996,806 km (0.099 R)
• M15: 4,208,936 km (0.088 R)
• M16: 4,783,392 km (0.105 R)
• M17: 4,924,014 km (0.044 R)
• M18: 5,065,833 km (0.079 R)
• M19: 5,470,495 km (0.06 R)
• M20: 5,588,079 km (0.12 R)
• M21: 5,825,939 km (0.119 R)
• M22: 6,621,651 km (0.098 R)
• M23: 6,841,859 km (0.088 R)
• M24: 7,386,694 km (0.11 R)
• M25: 7,484,232 km (0.114 R)
• M26: 8,012,312 km (0.106 R)
• M27: 8,213,372 km (0.116 R)
• M28: 8,416,227 km (0.081 R)
• M29: 8,895,987 km (0.119 R)
• M30: 9,667,912 km (0.081 R)
• M31: 9,953,943 km (0.053 R)
• M32: 10,755,189 km (0.117 R)
• M33: 11,501,533 km (0.072 R)
• M34: 11,652,926 km (0.082 R)
• M35: 12,730,480 km (0.094 R)
• M36: 13,202,162 km (0.087 R)
• M37: 13,559,701 km (0.12 R)
• M38: 13,719,621 km (0.117 R)
• M39: 13,880,139 km (0.095 R)
• M40: 14,528,646 km (0.058 R)
• M41: 15,645,394 km (0.099 R)
• M42: 16,235,408 km (0.037 R)
• M43: 16,405,351 km (0.046 R)
• M44: 16,789,818 km (0.096 R)
• M45: 16,918,622 km (0.097 R)
• M46: 17,437,128 km (0.117 R)
• M47: 17,917,187 km (0.098 R)
• M48: 18,180,779 km (0.092 R)
• M49: 19,835,032 km (0.102 R)
• M50: 20,336,035 km (0.073 R)
• M51: 21,211,332 km (0.097 R)
• M52: 21,304,233 km (0.108 R)
• M53: 22,381,786 km (0.086 R)
• M54: 22,808,290 km (0.106 R)
• M55: 22,951,156 km (0.102 R)
• M56: 24,638,769 km (0.073 R)
• M57: 24,883,063 km (0.07 R)
• M58: 25,030,117 km (0.085 R)
• M59: 25,670,396 km (0.108 R)
• M60: 26,515,923 km (0.07 R)
• M61: 27,370,576 km (0.08 R)
• M62: 27,775,986 km (0.11 R)
• M63: 27,877,563 km (0.108 R)
• M64: 28,900,813 km (0.1 R)
• M65: 29,003,886 km (0.087 R)
• M66: 30,197,228 km (0.06 R)
• M67: 30,563,593 km (0.059 R)
• M68: 31,353,769 km (0.119 R)
• M69: 32,846,606 km (0.073 R)
• M70: 33,927,002 km (0.114 R)
• M71: 34,417,085 km (0.084 R)
• M72: 34,580,894 km (0.057 R)
• M73: 35,183,923 km (0.065 R)
• M74: 35,294,027 km (0.071 R)
• M75: 35,679,990 km (0.111 R)
• M76: 36,846,255 km (0.104 R)

Planet 8 - Gas Giant

Semi-Major Axis: 9.31 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 408.6

Radius: 14.6

Gravity: 1.92 G

Time & Orbit

Eccentricity (e): 0.104

Orbit Range: 8.34 AU - 10.28 AU

Year: 10481 Days

Day: 14 Hours

Environment

Temp: -183 °C

Axial Tilt: 18.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 68,042,312 km

• M1: 192,084 km (0.088 R)
• M2: 290,070 km (0.105 R)
• M3: 430,094 km (0.039 R)
• M4: 590,463 km (0.049 R)
• M5: 701,764 km (0.096 R)
• M6: 1,338,303 km (0.083 R)
• M7: 1,453,194 km (0.077 R)
• M8: 1,756,129 km (0.027 R)
• M9: 1,947,914 km (0.107 R)
• M10: 2,784,914 km (0.079 R)
• M11: 2,909,379 km (0.075 R)
• M12: 3,320,774 km (0.051 R)
• M13: 3,533,502 km (0.071 R)
• M14: 4,342,826 km (0.108 R)
• M15: 4,843,530 km (0.1 R)
• M16: 4,964,106 km (0.087 R)
• M17: 5,055,211 km (0.078 R)
• M18: 5,868,276 km (0.119 R)
• M19: 5,964,766 km (0.111 R)
• M20: 6,455,148 km (0.073 R)
• M21: 6,621,501 km (0.1 R)
• M22: 6,722,031 km (0.083 R)
• M23: 7,968,181 km (0.107 R)
• M24: 8,399,472 km (0.093 R)
• M25: 8,801,441 km (0.054 R)
• M26: 9,060,545 km (0.066 R)
• M27: 9,586,381 km (0.032 R)
• M28: 10,006,602 km (0.113 R)
• M29: 10,277,224 km (0.048 R)
• M30: 10,589,435 km (0.088 R)
• M31: 10,984,224 km (0.082 R)
• M32: 11,103,603 km (0.074 R)
• M33: 11,464,283 km (0.082 R)
• M34: 11,951,224 km (0.062 R)
• M35: 12,321,030 km (0.12 R)
• M36: 12,527,924 km (0.114 R)
• M37: 12,861,677 km (0.079 R)
• M38: 13,751,485 km (0.092 R)
• M39: 13,923,373 km (0.109 R)
• M40: 14,139,093 km (0.081 R)
• M41: 14,355,860 km (0.091 R)
• M42: 14,617,507 km (0.068 R)
• M43: 14,968,913 km (0.03 R)
• M44: 15,190,018 km (0.032 R)
• M45: 15,501,182 km (0.104 R)
• M46: 15,635,371 km (0.051 R)
• M47: 17,043,087 km (0.08 R)
• M48: 17,366,667 km (0.104 R)
• M49: 18,113,759 km (0.114 R)
• M50: 18,396,649 km (0.07 R)
• M51: 18,538,617 km (0.08 R)
• M52: 18,966,766 km (0.033 R)
• M53: 19,350,185 km (0.05 R)
• M54: 20,075,885 km (0.086 R)
• M55: 21,057,396 km (0.089 R)
• M56: 21,903,971 km (0.116 R)
• M57: 22,004,351 km (0.116 R)
• M58: 22,155,145 km (0.089 R)
• M59: 22,356,803 km (0.092 R)
• M60: 22,812,628 km (0.096 R)
• M61: 24,198,503 km (0.102 R)
• M62: 24,718,655 km (0.093 R)
• M63: 24,823,074 km (0.112 R)
• M64: 25,242,546 km (0.086 R)
• M65: 25,611,455 km (0.11 R)
• M66: 25,823,136 km (0.056 R)
• M67: 27,105,040 km (0.108 R)
• M68: 27,753,846 km (0.087 R)
• M69: 30,735,930 km (0.076 R)
• M70: 31,017,323 km (0.074 R)
• M71: 31,469,109 km (0.108 R)
• M72: 32,264,970 km (0.098 R)
• M73: 33,125,157 km (0.102 R)
• M74: 33,297,943 km (0.116 R)
• M75: 34,050,869 km (0.096 R)
• M76: 34,225,450 km (0.035 R)
• M77: 35,161,334 km (0.084 R)
• M78: 35,868,782 km (0.037 R)
• M79: 41,322,522 km (0.12 R)
• M80: 41,570,855 km (0.102 R)

Planet 9 - Ice Giant

Semi-Major Axis: 13.11 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 638.8

Radius: 5

Gravity: 25.55 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 12.09 AU - 14.13 AU

Year: 17514 Days

Day: 16.4 Hours

Environment

Temp: -184 °C

Axial Tilt: 0 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 68,042,312 km

• M1: 68,217 km (0.05 R)
• M2: 585,825 km (0.101 R)
• M3: 626,516 km (0.055 R)
• M4: 868,266 km (0.116 R)
• M5: 1,162,824 km (0.111 R)
• M6: 1,486,554 km (0.089 R)
• M7: 1,806,693 km (0.11 R)
• M8: 2,610,184 km (0.095 R)
• M9: 2,644,442 km (0.089 R)
• M10: 3,396,769 km (0.092 R)
• M11: 3,547,115 km (0.093 R)
• M12: 3,738,301 km (0.106 R)
• M13: 4,170,489 km (0.08 R)
• M14: 4,412,838 km (0.04 R)
• M15: 4,953,784 km (0.08 R)
• M16: 5,515,374 km (0.115 R)
• M17: 5,781,359 km (0.102 R)
• M18: 5,961,026 km (0.11 R)
• M19: 6,839,166 km (0.119 R)
• M20: 7,029,155 km (0.081 R)
• M21: 7,806,466 km (0.091 R)
• M22: 7,955,316 km (0.047 R)
• M23: 8,155,029 km (0.118 R)
• M24: 8,970,786 km (0.111 R)
• M25: 9,178,877 km (0.082 R)
• M26: 11,120,956 km (0.028 R)
• M27: 11,795,643 km (0.118 R)
• M28: 12,252,664 km (0.103 R)
• M29: 13,184,210 km (0.118 R)
• M30: 13,302,243 km (0.109 R)
• M31: 13,361,483 km (0.083 R)
• M32: 14,138,345 km (0.071 R)
• M33: 14,380,395 km (0.038 R)
• M34: 16,619,127 km (0.084 R)
• M35: 16,938,518 km (0.119 R)
• M36: 17,453,733 km (0.118 R)
• M37: 17,583,435 km (0.09 R)
• M38: 18,170,756 km (0.081 R)
• M39: 20,514,954 km (0.055 R)
• M40: 21,063,979 km (0.101 R)
• M41: 21,548,376 km (0.12 R)
• M42: 22,810,683 km (0.061 R)
• M43: 23,593,828 km (0.063 R)
• M44: 24,024,670 km (0.032 R)
• M45: 24,168,882 km (0.089 R)
• M46: 24,748,574 km (0.116 R)
• M47: 25,479,659 km (0.087 R)
• M48: 25,995,622 km (0.108 R)
• M49: 26,888,123 km (0.067 R)
• M50: 27,715,100 km (0.03 R)
• M51: 28,093,732 km (0.087 R)
• M52: 28,321,719 km (0.089 R)
• M53: 29,162,908 km (0.077 R)
• M54: 29,239,801 km (0.076 R)
• M55: 30,012,325 km (0.107 R)
• M56: 30,167,757 km (0.057 R)
• M57: 30,713,490 km (0.078 R)
• M58: 30,869,969 km (0.12 R)
• M59: 31,498,580 km (0.107 R)
• M60: 31,972,955 km (0.105 R)
• M61: 32,052,241 km (0.104 R)
• M62: 32,131,528 km (0.067 R)
• M63: 32,688,780 km (0.104 R)
• M64: 33,329,658 km (0.055 R)
• M65: 33,490,475 km (0.098 R)
• M66: 34,055,506 km (0.113 R)
• M67: 34,949,653 km (0.101 R)
• M68: 36,346,598 km (0.117 R)
• M69: 38,940,775 km (0.095 R)
• M70: 40,388,583 km (0.038 R)
• M71: 40,817,629 km (0.069 R)
• M72: 41,162,153 km (0.073 R)
• M73: 41,248,322 km (0.096 R)
• M74: 41,421,107 km (0.12 R)
• M75: 42,811,171 km (0.099 R)
• M76: 43,512,037 km (0.088 R)
• M77: 44,128,230 km (0.094 R)
• M78: 45,013,700 km (0.054 R)
• M79: 45,458,604 km (0.1 R)
• M80: 45,547,764 km (0.087 R)
• M81: 45,994,464 km (0.086 R)
• M82: 47,252,881 km (0.098 R)
• M83: 47,614,459 km (0.112 R)
• M84: 48,158,547 km (0.063 R)
• M85: 48,887,387 km (0.086 R)
• M86: 48,978,642 km (0.111 R)
• M87: 51,095,302 km (0.063 R)
• M88: 55,131,752 km (0.104 R)
• M89: 57,043,762 km (0.082 R)
• M90: 60,245,755 km (0.071 R)
• M91: 62,511,714 km (0.044 R)
• M92: 62,710,081 km (0.101 R)
• M93: 66,215,159 km (0.104 R)
• M94: 68,042,348 km (0.112 R)

Kuiper Belt

Range: 30 - 50 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 243 - 12,926 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit