🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 1.31 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.21

Radius: 1.59

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.223

Orbit Range: 1.02 AU - 1.6 AU

Year: 669 Days

Day: 28.2 Hours

Environment

Temp: -88 °C

Axial Tilt: 36.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 2.23 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.52

Radius: 1.18

Gravity: 1.09 G

Time & Orbit

Eccentricity (e): 0.03

Orbit Range: 2.16 AU - 2.3 AU

Year: 1486 Days

Day: 26.4 Hours

Environment

Temp: -130 °C

Axial Tilt: 47.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 62,204,861 km

• M1: 1,010,534 km (0.064 R)

Asteroid Belt

Center: 3.25 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 3 - Gas Giant

Semi-Major Axis: 4.26 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 330.3

Radius: 9

Gravity: 4.08 G

Time & Orbit

Eccentricity (e): 0.105

Orbit Range: 3.81 AU - 4.71 AU

Year: 3923 Days

Day: 6.9 Hours

Environment

Temp: -161 °C

Axial Tilt: 2.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 62,204,861 km

• M1: 226,641 km (0.118 R)
• M2: 309,518 km (0.086 R)
• M3: 370,255 km (0.053 R)
• M4: 515,215 km (0.083 R)
• M5: 745,446 km (0.064 R)
• M6: 822,938 km (0.1 R)
• M7: 882,927 km (0.109 R)
• M8: 1,007,841 km (0.067 R)
• M9: 1,138,889 km (0.056 R)
• M10: 1,322,595 km (0.077 R)
• M11: 1,540,858 km (0.104 R)
• M12: 1,603,689 km (0.103 R)
• M13: 1,744,910 km (0.064 R)
• M14: 1,836,912 km (0.078 R)
• M15: 2,481,978 km (0.109 R)
• M16: 2,570,989 km (0.054 R)
• M17: 2,691,415 km (0.083 R)
• M18: 2,953,660 km (0.113 R)
• M19: 3,127,792 km (0.091 R)
• M20: 3,240,439 km (0.049 R)
• M21: 3,586,310 km (0.111 R)
• M22: 3,806,368 km (0.114 R)
• M23: 3,926,795 km (0.09 R)
• M24: 4,083,423 km (0.12 R)
• M25: 4,206,692 km (0.118 R)
• M26: 4,277,602 km (0.09 R)
• M27: 4,367,061 km (0.081 R)
• M28: 4,693,783 km (0.046 R)
• M29: 4,767,385 km (0.095 R)
• M30: 4,953,485 km (0.119 R)
• M31: 5,047,283 km (0.113 R)
• M32: 5,141,828 km (0.045 R)
• M33: 5,198,825 km (0.105 R)
• M34: 5,760,416 km (0.097 R)
• M35: 6,138,898 km (0.034 R)
• M36: 6,649,177 km (0.053 R)
• M37: 7,343,610 km (0.111 R)
• M38: 7,429,479 km (0.072 R)
• M39: 7,688,732 km (0.061 R)
• M40: 7,819,481 km (0.114 R)
• M41: 8,039,090 km (0.089 R)
• M42: 8,149,643 km (0.109 R)
• M43: 8,238,355 km (0.104 R)
• M44: 8,416,975 km (0.109 R)
• M45: 8,529,323 km (0.094 R)
• M46: 8,664,709 km (0.118 R)
• M47: 8,937,575 km (0.038 R)
• M48: 9,006,241 km (0.034 R)
• M49: 9,375,598 km (0.093 R)
• M50: 9,608,970 km (0.088 R)
• M51: 9,773,378 km (0.076 R)
• M52: 9,844,138 km (0.093 R)
• M53: 10,152,908 km (0.069 R)
• M54: 10,248,501 km (0.08 R)
• M55: 10,344,394 km (0.069 R)
• M56: 10,950,714 km (0.113 R)
• M57: 11,718,600 km (0.116 R)
• M58: 12,555,001 km (0.064 R)
• M59: 12,657,775 km (0.078 R)
• M60: 12,760,698 km (0.101 R)
• M61: 13,149,354 km (0.106 R)
• M62: 13,358,192 km (0.119 R)
• M63: 13,620,886 km (0.104 R)
• M64: 14,338,507 km (0.107 R)
• M65: 14,634,412 km (0.074 R)
• M66: 15,672,172 km (0.086 R)
• M67: 15,810,550 km (0.07 R)
• M68: 16,060,528 km (0.104 R)
• M69: 16,283,728 km (0.075 R)
• M70: 16,536,249 km (0.12 R)
• M71: 17,415,735 km (0.044 R)
• M72: 17,789,132 km (0.112 R)
• M73: 18,049,133 km (0.104 R)
• M74: 19,013,291 km (0.073 R)
• M75: 19,308,747 km (0.063 R)
• M76: 19,994,204 km (0.09 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.28 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 438.1

Radius: 12.4

Gravity: 2.85 G

Time & Orbit

Eccentricity (e): 0.231

Orbit Range: 3.29 AU - 5.27 AU

Year: 3951 Days

Day: 5.8 Hours

Environment

Temp: -168 °C

Axial Tilt: 6.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 62,204,861 km

• M1: 231,278 km (0.061 R)
• M2: 324,328 km (0.109 R)
• M3: 446,849 km (0.104 R)
• M4: 580,889 km (0.055 R)
• M5: 691,890 km (0.115 R)
• M6: 790,625 km (0.097 R)
• M7: 959,820 km (0.116 R)
• M8: 1,118,394 km (0.077 R)
• M9: 1,249,591 km (0.092 R)
• M10: 1,335,909 km (0.093 R)
• M11: 1,527,993 km (0.088 R)
• M12: 1,634,207 km (0.111 R)
• M13: 1,897,200 km (0.105 R)
• M14: 2,085,095 km (0.049 R)
• M15: 2,249,054 km (0.12 R)
• M16: 2,340,309 km (0.105 R)
• M17: 2,432,910 km (0.074 R)
• M18: 2,637,859 km (0.103 R)
• M19: 2,799,425 km (0.099 R)
• M20: 2,964,431 km (0.098 R)
• M21: 3,149,634 km (0.034 R)
• M22: 3,286,815 km (0.037 R)
• M23: 3,620,717 km (0.109 R)
• M24: 3,746,529 km (0.097 R)
• M25: 3,910,488 km (0.059 R)
• M26: 4,058,291 km (0.062 R)
• M27: 4,170,340 km (0.093 R)
• M28: 4,321,434 km (0.066 R)
• M29: 4,590,261 km (0.046 R)
• M30: 4,687,500 km (0.075 R)
• M31: 4,785,636 km (0.063 R)
• M32: 5,144,372 km (0.119 R)
• M33: 5,286,190 km (0.109 R)
• M34: 5,429,505 km (0.108 R)
• M35: 5,511,934 km (0.091 R)
• M36: 6,337,415 km (0.09 R)
• M37: 6,446,172 km (0.112 R)
• M38: 6,665,333 km (0.096 R)
• M39: 7,066,255 km (0.083 R)
• M40: 7,383,403 km (0.029 R)
• M41: 7,705,338 km (0.102 R)
• M42: 8,102,520 km (0.025 R)
• M43: 8,339,333 km (0.105 R)
• M44: 8,626,561 km (0.05 R)
• M45: 8,819,842 km (0.104 R)
• M46: 8,916,931 km (0.117 R)
• M47: 9,087,921 km (0.094 R)
• M48: 9,732,389 km (0.085 R)
• M49: 9,858,051 km (0.069 R)
• M50: 10,060,158 km (0.096 R)
• M51: 10,187,316 km (0.081 R)
• M52: 10,442,979 km (0.061 R)
• M53: 11,913,974 km (0.103 R)
• M54: 12,048,463 km (0.05 R)
• M55: 12,373,389 km (0.109 R)
• M56: 12,728,535 km (0.041 R)
• M57: 13,533,072 km (0.107 R)
• M58: 13,814,316 km (0.102 R)
• M59: 14,268,495 km (0.114 R)
• M60: 14,382,788 km (0.118 R)
• M61: 14,987,762 km (0.097 R)
• M62: 15,307,901 km (0.107 R)
• M63: 15,807,409 km (0.119 R)
• M64: 15,896,120 km (0.076 R)
• M65: 16,014,602 km (0.031 R)
• M66: 16,282,232 km (0.066 R)
• M67: 16,491,520 km (0.099 R)
• M68: 17,064,031 km (0.049 R)
• M69: 17,276,609 km (0.07 R)
• M70: 17,429,050 km (0.036 R)
• M71: 17,612,457 km (0.114 R)
• M72: 18,445,866 km (0.11 R)
• M73: 18,664,130 km (0.073 R)
• M74: 19,386,986 km (0.12 R)
• M75: 19,545,411 km (0.085 R)
• M76: 20,247,473 km (0.057 R)
• M77: 20,569,258 km (0.03 R)
• M78: 20,795,600 km (0.115 R)
• M79: 21,185,452 km (0.062 R)
• M80: 22,071,371 km (0.065 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 294.3

Radius: 13.5

Gravity: 1.61 G

Time & Orbit

Eccentricity (e): 0.04

Orbit Range: 4.38 AU - 4.74 AU

Year: 4345 Days

Day: 7.8 Hours

Environment

Temp: -161 °C

Axial Tilt: 20.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (71)

Outer Limit: 62,204,861 km

• M1: 188,493 km (0.083 R)
• M2: 291,267 km (0.041 R)
• M3: 501,153 km (0.073 R)
• M4: 599,139 km (0.092 R)
• M5: 705,204 km (0.068 R)
• M6: 888,312 km (0.066 R)
• M7: 1,012,778 km (0.117 R)
• M8: 1,188,705 km (0.088 R)
• M9: 1,280,857 km (0.062 R)
• M10: 1,411,755 km (0.114 R)
• M11: 1,779,018 km (0.063 R)
• M12: 2,106,188 km (0.115 R)
• M13: 2,602,853 km (0.114 R)
• M14: 2,849,391 km (0.07 R)
• M15: 3,266,320 km (0.103 R)
• M16: 3,583,617 km (0.115 R)
• M17: 3,685,942 km (0.111 R)
• M18: 4,051,709 km (0.12 R)
• M19: 4,539,547 km (0.093 R)
• M20: 4,706,349 km (0.064 R)
• M21: 4,988,939 km (0.105 R)
• M22: 5,199,872 km (0.092 R)
• M23: 5,296,662 km (0.088 R)
• M24: 5,551,278 km (0.113 R)
• M25: 6,630,926 km (0.052 R)
• M26: 6,757,186 km (0.065 R)
• M27: 6,926,830 km (0.118 R)
• M28: 7,444,439 km (0.083 R)
• M29: 7,553,944 km (0.109 R)
• M30: 7,818,733 km (0.078 R)
• M31: 8,176,571 km (0.111 R)
• M32: 8,266,928 km (0.116 R)
• M33: 8,380,323 km (0.027 R)
• M34: 8,815,952 km (0.062 R)
• M35: 9,048,128 km (0.115 R)
• M36: 9,282,398 km (0.098 R)
• M37: 9,424,067 km (0.119 R)
• M38: 9,637,693 km (0.095 R)
• M39: 9,877,050 km (0.052 R)
• M40: 10,215,440 km (0.058 R)
• M41: 10,631,472 km (0.079 R)
• M42: 10,754,890 km (0.117 R)
• M43: 11,153,120 km (0.115 R)
• M44: 11,404,594 km (0.08 R)
• M45: 11,734,158 km (0.075 R)
• M46: 11,861,765 km (0.062 R)
• M47: 12,041,133 km (0.051 R)
• M48: 12,376,830 km (0.066 R)
• M49: 12,558,891 km (0.12 R)
• M50: 12,741,849 km (0.077 R)
• M51: 13,375,695 km (0.082 R)
• M52: 14,646,828 km (0.085 R)
• M53: 15,005,265 km (0.096 R)
• M54: 15,282,918 km (0.06 R)
• M55: 15,590,342 km (0.068 R)
• M56: 15,815,188 km (0.081 R)
• M57: 16,610,749 km (0.097 R)
• M58: 16,984,445 km (0.119 R)
• M59: 17,361,132 km (0.103 R)
• M60: 17,506,691 km (0.071 R)
• M61: 17,711,191 km (0.116 R)
• M62: 18,004,702 km (0.099 R)
• M63: 18,656,201 km (0.099 R)
• M64: 18,805,350 km (0.117 R)
• M65: 19,556,930 km (0.05 R)
• M66: 19,738,841 km (0.082 R)
• M67: 19,860,314 km (0.066 R)
• M68: 20,257,197 km (0.088 R)
• M69: 20,410,535 km (0.115 R)
• M70: 20,625,806 km (0.104 R)
• M71: 20,749,075 km (0.105 R)

Planet 6 - Ice Giant

Semi-Major Axis: 10.06 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 910.8

Radius: 6.1

Gravity: 24.48 G

Time & Orbit

Eccentricity (e): 0.143

Orbit Range: 8.62 AU - 11.5 AU

Year: 14238 Days

Day: 20.1 Hours

Environment

Temp: -192 °C

Axial Tilt: 13.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 62,204,861 km

• M1: 163,510 km (0.091 R)
• M2: 308,321 km (0.087 R)
• M3: 935,286 km (0.083 R)
• M4: 1,698,085 km (0.116 R)
• M5: 1,874,910 km (0.095 R)
• M6: 2,214,647 km (0.049 R)
• M7: 2,408,077 km (0.085 R)
• M8: 2,674,361 km (0.063 R)
• M9: 2,880,357 km (0.062 R)
• M10: 2,985,375 km (0.059 R)
• M11: 3,091,590 km (0.06 R)
• M12: 3,985,586 km (0.106 R)
• M13: 4,141,916 km (0.056 R)
• M14: 4,181,410 km (0.115 R)
• M15: 4,260,547 km (0.096 R)
• M16: 4,460,859 km (0.09 R)
• M17: 4,582,482 km (0.104 R)
• M18: 4,623,173 km (0.11 R)
• M19: 5,292,174 km (0.099 R)
• M20: 5,550,829 km (0.108 R)
• M21: 5,681,578 km (0.115 R)
• M22: 5,857,654 km (0.063 R)
• M23: 6,305,849 km (0.112 R)
• M24: 6,718,440 km (0.032 R)
• M25: 7,092,734 km (0.119 R)
• M26: 7,187,280 km (0.117 R)
• M27: 7,473,610 km (0.088 R)
• M28: 8,454,823 km (0.087 R)
• M29: 8,555,203 km (0.085 R)
• M30: 9,011,626 km (0.09 R)
• M31: 9,842,642 km (0.066 R)
• M32: 10,267,201 km (0.099 R)
• M33: 10,860,805 km (0.119 R)
• M34: 11,799,981 km (0.092 R)
• M35: 11,968,278 km (0.037 R)
• M36: 12,535,554 km (0.101 R)
• M37: 13,227,593 km (0.058 R)
• M38: 13,578,251 km (0.116 R)
• M39: 13,695,835 km (0.095 R)
• M40: 13,754,776 km (0.103 R)
• M41: 13,932,050 km (0.118 R)
• M42: 14,950,811 km (0.091 R)
• M43: 16,680,312 km (0.088 R)
• M44: 17,568,624 km (0.106 R)
• M45: 19,126,836 km (0.095 R)
• M46: 21,477,318 km (0.077 R)
• M47: 21,820,495 km (0.093 R)
• M48: 22,234,582 km (0.119 R)
• M49: 23,633,920 km (0.084 R)
• M50: 24,201,495 km (0.049 R)
• M51: 25,061,383 km (0.118 R)
• M52: 25,133,489 km (0.064 R)
• M53: 25,422,662 km (0.119 R)
• M54: 26,369,916 km (0.113 R)
• M55: 27,551,440 km (0.105 R)
• M56: 27,700,439 km (0.114 R)
• M57: 29,584,325 km (0.108 R)
• M58: 30,119,287 km (0.095 R)
• M59: 30,195,881 km (0.106 R)
• M60: 31,121,144 km (0.12 R)
• M61: 31,431,560 km (0.102 R)
• M62: 31,587,142 km (0.062 R)
• M63: 33,078,184 km (0.105 R)
• M64: 33,315,745 km (0.105 R)
• M65: 33,872,099 km (0.051 R)
• M66: 34,351,561 km (0.102 R)
• M67: 35,884,340 km (0.093 R)
• M68: 36,945,887 km (0.083 R)
• M69: 37,521,689 km (0.091 R)
• M70: 38,432,740 km (0.119 R)
• M71: 40,614,625 km (0.096 R)
• M72: 41,464,491 km (0.066 R)
• M73: 44,746,967 km (0.114 R)
• M74: 46,065,523 km (0.103 R)
• M75: 46,330,760 km (0.119 R)
• M76: 47,040,452 km (0.063 R)
• M77: 48,201,631 km (0.107 R)
• M78: 48,470,907 km (0.108 R)
• M79: 49,010,955 km (0.093 R)
• M80: 49,372,084 km (0.067 R)
• M81: 50,734,173 km (0.119 R)
• M82: 54,519,897 km (0.058 R)
• M83: 56,021,710 km (0.047 R)
• M84: 56,588,536 km (0.106 R)
• M85: 57,537,136 km (0.108 R)
• M86: 57,632,280 km (0.047 R)
• M87: 57,727,574 km (0.072 R)
• M88: 58,108,899 km (0.112 R)
• M89: 58,204,343 km (0.107 R)
• M90: 58,682,607 km (0.041 R)
• M91: 60,318,011 km (0.065 R)
• M92: 60,511,441 km (0.052 R)
• M93: 62,163,600 km (0.098 R)
• M94: 62,358,975 km (0.105 R)
• M95: 63,240,555 km (0.099 R)
• M96: 65,115,166 km (0.111 R)
• M97: 66,707,935 km (0.082 R)

Planet 7 - Ice Giant

Semi-Major Axis: 15.95 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 185.3

Radius: 4.5

Gravity: 9.15 G

Time & Orbit

Eccentricity (e): 0.074

Orbit Range: 14.77 AU - 17.13 AU

Year: 28425 Days

Day: 17 Hours

Environment

Temp: -215 °C

Axial Tilt: 168.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 62,204,861 km

• M1: 118,182 km (0.091 R)
• M2: 411,693 km (0.085 R)
• M3: 590,912 km (0.053 R)
• M4: 629,508 km (0.072 R)
• M5: 901,776 km (0.044 R)
• M6: 946,655 km (0.07 R)
• M7: 1,062,145 km (0.043 R)
• M8: 1,383,930 km (0.068 R)
• M9: 1,733,989 km (0.112 R)
• M10: 1,933,552 km (0.081 R)
• M11: 2,575,178 km (0.113 R)
• M12: 3,036,538 km (0.03 R)
• M13: 3,381,510 km (0.061 R)
• M14: 3,451,971 km (0.096 R)
• M15: 3,702,697 km (0.106 R)
• M16: 3,996,208 km (0.058 R)
• M17: 4,961,264 km (0.094 R)
• M18: 5,081,690 km (0.119 R)
• M19: 5,994,087 km (0.054 R)
• M20: 6,208,461 km (0.06 R)
• M21: 6,512,893 km (0.077 R)
• M22: 6,688,970 km (0.11 R)
• M23: 6,911,272 km (0.085 R)
• M24: 8,295,352 km (0.056 R)
• M25: 9,263,998 km (0.087 R)
• M26: 10,268,099 km (0.044 R)
• M27: 11,043,464 km (0.054 R)
• M28: 11,148,333 km (0.082 R)
• M29: 15,076,324 km (0.101 R)
• M30: 15,660,803 km (0.09 R)
• M31: 15,837,478 km (0.066 R)
• M32: 16,014,901 km (0.091 R)
• M33: 16,851,602 km (0.111 R)
• M34: 17,093,352 km (0.086 R)
• M35: 18,754,337 km (0.103 R)
• M36: 19,889,934 km (0.107 R)
• M37: 20,017,392 km (0.09 R)
• M38: 20,659,316 km (0.088 R)
• M39: 20,917,821 km (0.081 R)
• M40: 20,982,747 km (0.106 R)
• M41: 21,242,598 km (0.051 R)
• M42: 22,491,890 km (0.113 R)
• M43: 22,624,883 km (0.082 R)
• M44: 23,832,586 km (0.116 R)
• M45: 25,061,084 km (0.119 R)
• M46: 25,405,907 km (0.068 R)
• M47: 25,613,699 km (0.119 R)
• M48: 26,030,628 km (0.104 R)
• M49: 26,170,203 km (0.086 R)
• M50: 26,801,207 km (0.08 R)
• M51: 27,153,809 km (0.092 R)
• M52: 28,006,517 km (0.052 R)
• M53: 28,723,838 km (0.066 R)
• M54: 30,690,452 km (0.076 R)
• M55: 30,911,558 km (0.087 R)
• M56: 31,950,814 km (0.086 R)
• M57: 32,174,912 km (0.071 R)
• M58: 33,076,837 km (0.111 R)
• M59: 33,606,862 km (0.102 R)
• M60: 34,828,628 km (0.076 R)
• M61: 34,982,415 km (0.083 R)
• M62: 35,522,314 km (0.112 R)
• M63: 36,844,908 km (0.085 R)
• M64: 38,183,510 km (0.081 R)
• M65: 38,819,002 km (0.039 R)
• M66: 39,297,865 km (0.042 R)
• M67: 39,859,006 km (0.071 R)
• M68: 40,908,286 km (0.062 R)
• M69: 43,033,772 km (0.116 R)
• M70: 44,442,685 km (0.034 R)
• M71: 45,614,485 km (0.111 R)
• M72: 45,698,559 km (0.097 R)
• M73: 45,782,633 km (0.076 R)
• M74: 45,866,857 km (0.074 R)
• M75: 46,881,130 km (0.068 R)
• M76: 47,135,746 km (0.056 R)
• M77: 47,817,314 km (0.108 R)
• M78: 47,902,734 km (0.101 R)
• M79: 48,244,865 km (0.082 R)
• M80: 50,836,947 km (0.108 R)
• M81: 52,237,632 km (0.069 R)
• M82: 52,942,836 km (0.111 R)
• M83: 53,828,755 km (0.097 R)
• M84: 54,006,477 km (0.117 R)
• M85: 54,540,990 km (0.108 R)
• M86: 54,987,689 km (0.114 R)
• M87: 57,239,436 km (0.045 R)
• M88: 57,511,555 km (0.038 R)
• M89: 57,693,316 km (0.076 R)
• M90: 58,057,438 km (0.032 R)
• M91: 58,239,648 km (0.061 R)
• M92: 58,604,816 km (0.06 R)
• M93: 59,245,694 km (0.098 R)
• M94: 59,980,967 km (0.111 R)
• M95: 60,073,119 km (0.077 R)
• M96: 60,811,834 km (0.083 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: 317 - 19,013 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit