🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 406.6

Radius: 12.8

Gravity: 2.48 G

Time & Orbit

Eccentricity (e): 0.051

Orbit Range: 0.62 AU - 0.68 AU

Year: 355 Days

Day: 8.1 Hours

Environment

Temp: -153 °C

Axial Tilt: 22.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (36)

Outer Limit: 29,274,705 km

• M1: 161,117 km (0.093 R)
• M2: 252,372 km (0.116 R)
• M3: 355,893 km (0.112 R)
• M4: 468,989 km (0.088 R)
• M5: 562,937 km (0.077 R)
• M6: 655,538 km (0.12 R)
• M7: 741,257 km (0.076 R)
• M8: 821,143 km (0.095 R)
• M9: 969,095 km (0.071 R)
• M10: 1,084,435 km (0.084 R)
• M11: 1,196,783 km (0.12 R)
• M12: 1,338,153 km (0.084 R)
• M13: 1,421,479 km (0.062 R)
• M14: 1,528,441 km (0.029 R)
• M15: 1,651,411 km (0.083 R)
• M16: 1,787,246 km (0.077 R)
• M17: 1,870,572 km (0.117 R)
• M18: 1,979,030 km (0.12 R)
• M19: 2,080,009 km (0.096 R)
• M20: 2,207,466 km (0.111 R)
• M21: 2,292,288 km (0.052 R)
• M22: 2,439,492 km (0.082 R)
• M23: 2,537,778 km (0.034 R)
• M24: 2,685,132 km (0.064 R)
• M25: 2,765,317 km (0.106 R)
• M26: 2,922,544 km (0.095 R)
• M27: 3,054,938 km (0.108 R)
• M28: 3,195,111 km (0.053 R)
• M29: 3,412,327 km (0.083 R)
• M30: 3,511,212 km (0.074 R)
• M31: 3,717,657 km (0.114 R)
• M32: 3,807,266 km (0.099 R)
• M33: 3,952,376 km (0.114 R)
• M34: 4,105,564 km (0.042 R)
• M35: 4,192,181 km (0.099 R)
• M36: 4,335,945 km (0.059 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 622.7

Radius: 8.3

Gravity: 9.04 G

Time & Orbit

Eccentricity (e): 0.205

Orbit Range: 0.6 AU - 0.9 AU

Year: 441 Days

Day: 13.9 Hours

Environment

Temp: -170 °C

Axial Tilt: 28.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (54)

Outer Limit: 29,274,705 km

• M1: 104,120 km (0.112 R)
• M2: 180,565 km (0.094 R)
• M3: 249,230 km (0.097 R)
• M4: 313,557 km (0.096 R)
• M5: 376,089 km (0.034 R)
• M6: 498,460 km (0.089 R)
• M7: 563,236 km (0.109 R)
• M8: 615,894 km (0.095 R)
• M9: 694,284 km (0.058 R)
• M10: 822,788 km (0.112 R)
• M11: 910,153 km (0.102 R)
• M12: 1,113,756 km (0.111 R)
• M13: 1,191,397 km (0.079 R)
• M14: 1,250,937 km (0.116 R)
• M15: 1,311,525 km (0.094 R)
• M16: 1,414,747 km (0.107 R)
• M17: 1,499,419 km (0.049 R)
• M18: 1,651,560 km (0.101 R)
• M19: 1,707,211 km (0.109 R)
• M20: 1,763,460 km (0.102 R)
• M21: 1,995,037 km (0.068 R)
• M22: 2,054,428 km (0.058 R)
• M23: 2,132,518 km (0.11 R)
• M24: 2,442,634 km (0.051 R)
• M25: 2,544,809 km (0.052 R)
• M26: 2,622,451 km (0.083 R)
• M27: 2,674,660 km (0.099 R)
• M28: 2,753,648 km (0.103 R)
• M29: 3,029,506 km (0.039 R)
• M30: 3,098,172 km (0.101 R)
• M31: 3,153,374 km (0.106 R)
• M32: 3,300,129 km (0.074 R)
• M33: 3,363,708 km (0.107 R)
• M34: 3,499,244 km (0.091 R)
• M35: 3,724,389 km (0.089 R)
• M36: 3,835,091 km (0.103 R)
• M37: 3,887,151 km (0.088 R)
• M38: 3,939,361 km (0.088 R)
• M39: 3,991,870 km (0.093 R)
• M40: 4,120,374 km (0.12 R)
• M41: 4,181,260 km (0.116 R)
• M42: 4,304,080 km (0.083 R)
• M43: 4,420,318 km (0.094 R)
• M44: 4,545,531 km (0.106 R)
• M45: 4,616,441 km (0.028 R)
• M46: 4,719,514 km (0.052 R)
• M47: 4,927,903 km (0.114 R)
• M48: 5,008,986 km (0.095 R)
• M49: 5,123,129 km (0.106 R)
• M50: 5,213,336 km (0.117 R)
• M51: 5,279,309 km (0.072 R)
• M52: 5,362,336 km (0.056 R)
• M53: 5,521,059 km (0.044 R)
• M54: 5,706,710 km (0.068 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 37.6

Radius: 14

Gravity: 0.19 G

Time & Orbit

Eccentricity (e): 0.188

Orbit Range: 0.76 AU - 1.12 AU

Year: 618 Days

Day: 5.3 Hours

Environment

Temp: -168 °C

Axial Tilt: 14.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 29,274,705 km

• M1: 176,376 km (0.109 R)
• M2: 270,323 km (0.056 R)
• M3: 416,780 km (0.047 R)
• M4: 522,396 km (0.066 R)
• M5: 635,641 km (0.071 R)
• M6: 793,018 km (0.104 R)
• M7: 922,720 km (0.117 R)
• M8: 1,130,810 km (0.106 R)
• M9: 1,261,708 km (0.088 R)
• M10: 1,407,417 km (0.044 R)
• M11: 1,581,698 km (0.086 R)
• M12: 1,676,693 km (0.081 R)
• M13: 1,800,859 km (0.096 R)
• M14: 1,921,136 km (0.06 R)
• M15: 2,087,339 km (0.105 R)
• M16: 2,181,287 km (0.087 R)
• M17: 2,280,470 km (0.101 R)
• M18: 2,472,254 km (0.113 R)
• M19: 2,595,373 km (0.046 R)
• M20: 2,835,927 km (0.096 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.46 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 597.6

Radius: 9.3

Gravity: 6.91 G

Time & Orbit

Eccentricity (e): 0.117

Orbit Range: 1.29 AU - 1.63 AU

Year: 1197 Days

Day: 10.4 Hours

Environment

Temp: -183 °C

Axial Tilt: 32.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (62)

Outer Limit: 29,274,705 km

• M1: 213,775 km (0.071 R)
• M2: 273,315 km (0.063 R)
• M3: 383,569 km (0.083 R)
• M4: 453,282 km (0.075 R)
• M5: 584,628 km (0.079 R)
• M6: 643,420 km (0.058 R)
• M7: 729,589 km (0.043 R)
• M8: 839,992 km (0.109 R)
• M9: 1,005,597 km (0.086 R)
• M10: 1,107,473 km (0.086 R)
• M11: 1,228,199 km (0.049 R)
• M12: 1,369,419 km (0.104 R)
• M13: 1,450,351 km (0.093 R)
• M14: 1,763,759 km (0.093 R)
• M15: 1,834,369 km (0.109 R)
• M16: 1,924,128 km (0.073 R)
• M17: 1,996,832 km (0.06 R)
• M18: 2,061,309 km (0.066 R)
• M19: 2,365,292 km (0.089 R)
• M20: 2,622,750 km (0.118 R)
• M21: 2,796,134 km (0.091 R)
• M22: 2,868,539 km (0.115 R)
• M23: 2,931,221 km (0.056 R)
• M24: 3,132,729 km (0.057 R)
• M25: 3,273,201 km (0.088 R)
• M26: 3,360,716 km (0.083 R)
• M27: 3,493,409 km (0.099 R)
• M28: 3,571,649 km (0.085 R)
• M29: 4,159,419 km (0.118 R)
• M30: 4,242,446 km (0.051 R)
• M31: 4,568,121 km (0.114 R)
• M32: 4,777,258 km (0.108 R)
• M33: 5,052,668 km (0.081 R)
• M34: 5,710,899 km (0.068 R)
• M35: 5,949,807 km (0.104 R)
• M36: 6,110,774 km (0.108 R)
• M37: 6,178,392 km (0.113 R)
• M38: 6,259,773 km (0.027 R)
• M39: 6,355,217 km (0.06 R)
• M40: 6,451,109 km (0.074 R)
• M41: 6,533,687 km (0.036 R)
• M42: 6,630,327 km (0.106 R)
• M43: 6,881,502 km (0.098 R)
• M44: 7,036,485 km (0.11 R)
• M45: 7,278,236 km (0.047 R)
• M46: 7,522,828 km (0.069 R)
• M47: 7,653,427 km (0.11 R)
• M48: 7,887,548 km (0.093 R)
• M49: 8,020,241 km (0.084 R)
• M50: 8,242,992 km (0.07 R)
• M51: 8,302,682 km (0.114 R)
• M52: 8,437,769 km (0.055 R)
• M53: 8,528,126 km (0.114 R)
• M54: 9,387,416 km (0.032 R)
• M55: 9,559,454 km (0.114 R)
• M56: 9,779,961 km (0.114 R)
• M57: 9,859,098 km (0.048 R)
• M58: 9,938,385 km (0.038 R)
• M59: 10,483,819 km (0.071 R)
• M60: 10,858,113 km (0.046 R)
• M61: 10,940,092 km (0.104 R)
• M62: 11,071,738 km (0.044 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.6 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 309.1

Radius: 13

Gravity: 1.83 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 1.49 AU - 1.71 AU

Year: 1373 Days

Day: 5.6 Hours

Environment

Temp: -191 °C

Axial Tilt: 28.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (52)

Outer Limit: 29,274,705 km

• M1: 250,427 km (0.045 R)
• M2: 351,405 km (0.1 R)
• M3: 470,485 km (0.12 R)
• M4: 591,959 km (0.111 R)
• M5: 715,078 km (0.039 R)
• M6: 824,135 km (0.095 R)
• M7: 1,195,437 km (0.097 R)
• M8: 1,393,355 km (0.065 R)
• M9: 1,481,617 km (0.119 R)
• M10: 1,571,974 km (0.11 R)
• M11: 1,766,452 km (0.063 R)
• M12: 1,887,028 km (0.101 R)
• M13: 2,318,318 km (0.068 R)
• M14: 2,487,065 km (0.069 R)
• M15: 2,577,571 km (0.039 R)
• M16: 3,027,562 km (0.099 R)
• M17: 3,153,673 km (0.118 R)
• M18: 3,281,728 km (0.063 R)
• M19: 3,707,334 km (0.069 R)
• M20: 3,842,721 km (0.083 R)
• M21: 3,926,795 km (0.082 R)
• M22: 4,064,873 km (0.114 R)
• M23: 4,172,135 km (0.053 R)
• M24: 4,302,285 km (0.086 R)
• M25: 4,667,005 km (0.118 R)
• M26: 4,768,133 km (0.079 R)
• M27: 5,168,906 km (0.084 R)
• M28: 5,297,261 km (0.117 R)
• M29: 5,414,695 km (0.108 R)
• M30: 5,604,535 km (0.094 R)
• M31: 5,893,558 km (0.062 R)
• M32: 6,162,834 km (0.089 R)
• M33: 6,261,718 km (0.08 R)
• M34: 6,411,017 km (0.043 R)
• M35: 6,662,640 km (0.102 R)
• M36: 6,777,083 km (0.119 R)
• M37: 6,994,748 km (0.098 R)
• M38: 7,149,881 km (0.063 R)
• M39: 7,345,405 km (0.088 R)
• M40: 7,608,847 km (0.117 R)
• M41: 7,861,966 km (0.062 R)
• M42: 8,090,851 km (0.08 R)
• M43: 8,172,232 km (0.1 R)
• M44: 8,267,377 km (0.117 R)
• M45: 8,349,356 km (0.115 R)
• M46: 8,555,353 km (0.119 R)
• M47: 8,916,482 km (0.065 R)
• M48: 9,155,240 km (0.093 R)
• M49: 9,353,607 km (0.05 R)
• M50: 9,596,255 km (0.077 R)
• M51: 9,682,423 km (0.103 R)
• M52: 9,768,891 km (0.101 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.87 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 319.9

Radius: 12.3

Gravity: 2.11 G

Time & Orbit

Eccentricity (e): 0.006

Orbit Range: 4.84 AU - 4.9 AU

Year: 7289 Days

Day: 14.7 Hours

Environment

Temp: -221 °C

Axial Tilt: 33.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 29,274,705 km

• M1: 197,320 km (0.055 R)
• M2: 439,070 km (0.091 R)
• M3: 518,656 km (0.119 R)
• M4: 672,742 km (0.102 R)
• M5: 1,114,803 km (0.111 R)
• M6: 1,383,182 km (0.094 R)
• M7: 1,557,613 km (0.092 R)
• M8: 1,672,654 km (0.114 R)
• M9: 2,290,643 km (0.099 R)
• M10: 2,833,384 km (0.061 R)
• M11: 3,078,126 km (0.107 R)
• M12: 3,394,076 km (0.072 R)
• M13: 3,501,787 km (0.116 R)
• M14: 3,588,703 km (0.078 R)
• M15: 3,720,499 km (0.065 R)
• M16: 4,080,132 km (0.09 R)
• M17: 4,760,653 km (0.048 R)
• M18: 5,077,202 km (0.105 R)
• M19: 5,963,570 km (0.062 R)
• M20: 6,545,206 km (0.076 R)
• M21: 6,979,788 km (0.109 R)
• M22: 7,228,270 km (0.116 R)
• M23: 7,311,895 km (0.084 R)
• M24: 7,536,142 km (0.061 R)
• M25: 7,905,499 km (0.08 R)
• M26: 7,991,518 km (0.113 R)
• M27: 8,135,731 km (0.041 R)
• M28: 8,397,527 km (0.079 R)
• M29: 8,544,133 km (0.116 R)
• M30: 8,750,727 km (0.114 R)
• M31: 9,259,659 km (0.102 R)
• M32: 9,624,678 km (0.095 R)
• M33: 9,808,983 km (0.116 R)
• M34: 10,087,684 km (0.073 R)
• M35: 10,526,454 km (0.088 R)
• M36: 10,907,480 km (0.049 R)
• M37: 11,228,517 km (0.075 R)
• M38: 11,325,456 km (0.06 R)
• M39: 11,455,008 km (0.064 R)
• M40: 11,650,533 km (0.03 R)
• M41: 11,781,431 km (0.12 R)
• M42: 13,219,365 km (0.05 R)
• M43: 13,321,690 km (0.089 R)
• M44: 14,641,443 km (0.1 R)
• M45: 14,818,267 km (0.053 R)
• M46: 15,173,862 km (0.119 R)
• M47: 15,857,374 km (0.11 R)
• M48: 17,478,716 km (0.054 R)
• M49: 17,854,506 km (0.095 R)
• M50: 18,043,448 km (0.043 R)
• M51: 18,309,134 km (0.097 R)
• M52: 18,576,016 km (0.107 R)
• M53: 18,729,055 km (0.118 R)
• M54: 18,805,799 km (0.084 R)
• M55: 18,920,989 km (0.116 R)
• M56: 19,190,864 km (0.091 R)
• M57: 19,851,637 km (0.046 R)
• M58: 20,519,742 km (0.106 R)
• M59: 20,717,660 km (0.085 R)
• M60: 21,235,268 km (0.102 R)
• M61: 21,716,824 km (0.119 R)
• M62: 21,797,457 km (0.045 R)
• M63: 22,039,955 km (0.065 R)
• M64: 23,059,614 km (0.045 R)
• M65: 23,845,003 km (0.046 R)
• M66: 24,053,094 km (0.103 R)
• M67: 24,136,569 km (0.05 R)
• M68: 24,429,332 km (0.116 R)
• M69: 24,513,107 km (0.104 R)
• M70: 24,597,031 km (0.078 R)
• M71: 24,723,143 km (0.084 R)
• M72: 25,399,474 km (0.111 R)
• M73: 25,739,810 km (0.088 R)
• M74: 25,910,650 km (0.117 R)
• M75: 26,210,295 km (0.117 R)
• M76: 26,943,175 km (0.118 R)
• M77: 27,116,559 km (0.076 R)
• M78: 27,333,775 km (0.086 R)
• M79: 28,826,612 km (0.114 R)
• M80: 29,315,199 km (0.099 R)

Planet 7 - Ice Giant

Semi-Major Axis: 5.65 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 97.4

Radius: 5

Gravity: 3.9 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 4.75 AU - 6.55 AU

Year: 9109 Days

Day: 20.2 Hours

Environment

Temp: -232 °C

Axial Tilt: 47 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 29,274,705 km

• M1: 65,973 km (0.088 R)
• M2: 100,979 km (0.118 R)
• M3: 154,834 km (0.102 R)
• M4: 196,422 km (0.044 R)
• M5: 301,141 km (0.047 R)
• M6: 348,264 km (0.119 R)
• M7: 515,215 km (0.04 R)
• M8: 905,965 km (0.086 R)
• M9: 1,000,511 km (0.104 R)
• M10: 1,619,397 km (0.066 R)
• M11: 1,720,076 km (0.039 R)
• M12: 2,665,385 km (0.085 R)
• M13: 3,686,092 km (0.119 R)
• M14: 4,031,064 km (0.083 R)
• M15: 4,167,946 km (0.083 R)
• M16: 4,669,548 km (0.109 R)
• M17: 4,937,927 km (0.114 R)
• M18: 5,105,626 km (0.103 R)
• M19: 5,211,242 km (0.112 R)
• M20: 5,339,148 km (0.071 R)
• M21: 5,927,217 km (0.079 R)
• M22: 6,330,533 km (0.051 R)
• M23: 6,719,637 km (0.105 R)
• M24: 6,812,238 km (0.075 R)
• M25: 6,882,100 km (0.107 R)
• M26: 7,092,884 km (0.112 R)
• M27: 7,140,007 km (0.09 R)
• M28: 7,424,991 km (0.098 R)
• M29: 7,737,950 km (0.056 R)
• M30: 8,030,713 km (0.093 R)
• M31: 8,576,745 km (0.099 R)
• M32: 9,134,596 km (0.105 R)
• M33: 9,651,905 km (0.107 R)
• M34: 9,704,264 km (0.086 R)
• M35: 9,782,803 km (0.054 R)
• M36: 9,993,287 km (0.106 R)
• M37: 10,258,674 km (0.062 R)
• M38: 10,634,015 km (0.098 R)
• M39: 11,041,071 km (0.039 R)
• M40: 11,591,741 km (0.104 R)
• M41: 12,010,615 km (0.116 R)
• M42: 13,093,853 km (0.041 R)
• M43: 15,997,099 km (0.099 R)
• M44: 16,369,597 km (0.048 R)
• M45: 17,472,283 km (0.095 R)
• M46: 18,468,904 km (0.077 R)
• M47: 18,533,830 km (0.073 R)
• M48: 18,696,443 km (0.098 R)
• M49: 18,826,892 km (0.054 R)
• M50: 19,121,600 km (0.045 R)
• M51: 19,384,742 km (0.065 R)
• M52: 19,516,837 km (0.075 R)
• M53: 21,875,547 km (0.06 R)
• M54: 22,047,435 km (0.097 R)
• M55: 22,357,851 km (0.105 R)
• M56: 23,018,176 km (0.112 R)

Planet 8 - Ice Giant

Semi-Major Axis: 8.32 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 58.9

Radius: 5.9

Gravity: 1.69 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 7.8 AU - 8.84 AU

Year: 16277 Days

Day: 17.8 Hours

Environment

Temp: -230 °C

Axial Tilt: 20 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 29,274,705 km

• M1: 352,153 km (0.1 R)
• M2: 419,622 km (0.102 R)
• M3: 591,211 km (0.119 R)
• M4: 955,631 km (0.055 R)
• M5: 1,287,290 km (0.047 R)
• M6: 1,769,743 km (0.075 R)
• M7: 1,959,732 km (0.095 R)
• M8: 2,359,458 km (0.09 R)
• M9: 3,127,792 km (0.11 R)
• M10: 3,336,481 km (0.09 R)
• M11: 3,636,275 km (0.111 R)
• M12: 3,789,464 km (0.065 R)
• M13: 3,900,166 km (0.09 R)
• M14: 4,215,818 km (0.093 R)
• M15: 4,376,785 km (0.069 R)
• M16: 4,633,794 km (0.051 R)
• M17: 4,919,676 km (0.088 R)
• M18: 5,990,796 km (0.09 R)
• M19: 7,405,394 km (0.112 R)
• M20: 9,814,817 km (0.053 R)
• M21: 9,875,554 km (0.086 R)
• M22: 10,243,116 km (0.111 R)
• M23: 10,584,049 km (0.118 R)
• M24: 11,500,336 km (0.104 R)
• M25: 12,212,422 km (0.109 R)
• M26: 12,838,788 km (0.093 R)
• M27: 13,577,054 km (0.09 R)
• M28: 13,849,023 km (0.101 R)
• M29: 14,260,267 km (0.067 R)
• M30: 14,710,258 km (0.094 R)
• M31: 15,164,886 km (0.097 R)
• M32: 15,270,352 km (0.055 R)
• M33: 15,411,573 km (0.103 R)
• M34: 15,730,665 km (0.078 R)
• M35: 17,212,133 km (0.106 R)
• M36: 18,473,991 km (0.117 R)
• M37: 19,268,206 km (0.109 R)
• M38: 19,382,648 km (0.066 R)
• M39: 20,968,086 km (0.12 R)
• M40: 21,994,926 km (0.047 R)
• M41: 22,675,297 km (0.104 R)
• M42: 22,916,898 km (0.082 R)
• M43: 22,957,289 km (0.083 R)
• M44: 23,647,235 km (0.106 R)
• M45: 23,728,915 km (0.08 R)
• M46: 24,138,364 km (0.096 R)
• M47: 24,467,629 km (0.092 R)
• M48: 24,508,918 km (0.105 R)
• M49: 25,673,687 km (0.096 R)
• M50: 25,841,536 km (0.062 R)
• M51: 26,009,834 km (0.112 R)
• M52: 28,186,483 km (0.104 R)
• M53: 28,881,365 km (0.072 R)
• M54: 29,143,460 km (0.031 R)
• M55: 29,187,143 km (0.087 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: 167 - 19,687 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit