🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 3.3 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.82

Radius: 0.92

Gravity: 0.97 G

Time & Orbit

Eccentricity (e): 0.218

Orbit Range: 2.58 AU - 4.02 AU

Year: 2212 Days

Day: 36.3 Hours

Environment

Temp: -106 °C

Axial Tilt: 29.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 5.56 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 2 - Gas Giant

Semi-Major Axis: 7.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 811.1

Radius: 8

Gravity: 12.67 G

Time & Orbit

Eccentricity (e): 0.131

Orbit Range: 6.79 AU - 8.83 AU

Year: 8053 Days

Day: 8.8 Hours

Environment

Temp: -175 °C

Axial Tilt: 36.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 81,475,424 km

• M1: 100,829 km (0.096 R)
• M2: 517,609 km (0.051 R)
• M3: 603,927 km (0.088 R)
• M4: 759,209 km (0.075 R)
• M5: 1,203,964 km (0.096 R)
• M6: 1,610,870 km (0.064 R)
• M7: 1,675,496 km (0.045 R)
• M8: 2,320,263 km (0.103 R)
• M9: 2,643,694 km (0.086 R)
• M10: 2,876,019 km (0.103 R)
• M11: 2,928,678 km (0.084 R)
• M12: 3,061,371 km (0.108 R)
• M13: 3,527,817 km (0.108 R)
• M14: 4,045,874 km (0.083 R)
• M15: 4,134,586 km (0.073 R)
• M16: 4,557,050 km (0.108 R)
• M17: 4,742,402 km (0.1 R)
• M18: 4,961,713 km (0.049 R)
• M19: 5,805,295 km (0.1 R)
• M20: 6,484,021 km (0.072 R)
• M21: 7,187,878 km (0.118 R)
• M22: 8,477,113 km (0.096 R)
• M23: 8,743,397 km (0.106 R)
• M24: 9,559,005 km (0.082 R)
• M25: 9,677,486 km (0.112 R)
• M26: 10,035,773 km (0.037 R)
• M27: 10,439,089 km (0.099 R)
• M28: 10,683,682 km (0.073 R)
• M29: 11,261,728 km (0.072 R)
• M30: 11,596,528 km (0.047 R)
• M31: 11,680,751 km (0.093 R)
• M32: 12,361,870 km (0.117 R)
• M33: 13,099,687 km (0.098 R)
• M34: 13,496,122 km (0.101 R)
• M35: 13,985,905 km (0.102 R)
• M36: 15,397,510 km (0.077 R)
• M37: 15,536,487 km (0.081 R)
• M38: 15,955,959 km (0.037 R)
• M39: 16,190,678 km (0.081 R)
• M40: 16,521,140 km (0.061 R)
• M41: 17,092,903 km (0.093 R)
• M42: 17,284,837 km (0.091 R)
• M43: 17,381,178 km (0.052 R)
• M44: 18,060,053 km (0.093 R)
• M45: 18,599,653 km (0.063 R)
• M46: 19,343,902 km (0.074 R)
• M47: 19,795,089 km (0.107 R)
• M48: 20,097,876 km (0.103 R)
• M49: 20,300,581 km (0.078 R)
• M50: 20,759,098 km (0.108 R)
• M51: 22,259,565 km (0.104 R)
• M52: 23,474,449 km (0.103 R)
• M53: 23,794,888 km (0.113 R)
• M54: 24,170,528 km (0.088 R)
• M55: 24,873,488 km (0.089 R)
• M56: 24,927,792 km (0.095 R)
• M57: 25,802,790 km (0.109 R)
• M58: 26,743,462 km (0.118 R)
• M59: 26,854,763 km (0.115 R)
• M60: 27,022,163 km (0.113 R)
• M61: 27,078,112 km (0.08 R)
• M62: 27,190,011 km (0.077 R)
• M63: 27,414,109 km (0.054 R)
• M64: 28,430,627 km (0.116 R)
• M65: 28,601,318 km (0.037 R)
• M66: 28,829,305 km (0.07 R)
• M67: 29,115,186 km (0.07 R)
• M68: 29,632,047 km (0.106 R)
• M69: 31,612,124 km (0.05 R)
• M70: 31,671,066 km (0.091 R)
• M71: 31,847,891 km (0.094 R)
• M72: 32,856,330 km (0.114 R)
• M73: 33,514,561 km (0.1 R)
• M74: 34,661,527 km (0.104 R)
• M75: 34,843,738 km (0.066 R)
• M76: 35,821,210 km (0.112 R)
• M77: 36,436,805 km (0.086 R)
• M78: 37,117,924 km (0.109 R)
• M79: 38,241,554 km (0.113 R)
• M80: 38,807,483 km (0.11 R)
• M81: 39,312,974 km (0.084 R)
• M82: 39,439,683 km (0.105 R)
• M83: 40,778,136 km (0.058 R)
• M84: 40,970,668 km (0.109 R)
• M85: 41,420,808 km (0.098 R)
• M86: 41,937,369 km (0.107 R)
• M87: 42,716,176 km (0.118 R)
• M88: 42,846,326 km (0.039 R)
• M89: 43,303,348 km (0.088 R)

Planet 3 - Gas Giant

Semi-Major Axis: 10.21 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 718.3

Radius: 13.3

Gravity: 4.06 G

Time & Orbit

Eccentricity (e): 0.154

Orbit Range: 8.64 AU - 11.78 AU

Year: 12037 Days

Day: 8.3 Hours

Environment

Temp: -177 °C

Axial Tilt: 47.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 81,475,424 km

• M1: 190,887 km (0.095 R)
• M2: 276,606 km (0.066 R)
• M3: 409,150 km (0.064 R)
• M4: 556,354 km (0.104 R)
• M5: 893,398 km (0.088 R)
• M6: 1,054,964 km (0.069 R)
• M7: 1,182,870 km (0.092 R)
• M8: 1,551,031 km (0.096 R)
• M9: 1,955,095 km (0.079 R)
• M10: 2,651,921 km (0.041 R)
• M11: 3,074,087 km (0.075 R)
• M12: 3,421,154 km (0.113 R)
• M13: 4,291,215 km (0.093 R)
• M14: 4,679,421 km (0.027 R)
• M15: 4,896,189 km (0.069 R)
• M16: 5,642,233 km (0.077 R)
• M17: 5,795,870 km (0.095 R)
• M18: 6,344,296 km (0.099 R)
• M19: 6,746,266 km (0.082 R)
• M20: 7,323,115 km (0.102 R)
• M21: 7,915,971 km (0.088 R)
• M22: 9,057,702 km (0.075 R)
• M23: 9,419,280 km (0.112 R)
• M24: 10,344,394 km (0.079 R)
• M25: 11,933,422 km (0.059 R)
• M26: 12,230,374 km (0.067 R)
• M27: 13,545,938 km (0.116 R)
• M28: 14,430,360 km (0.094 R)
• M29: 14,746,909 km (0.064 R)
• M30: 15,012,446 km (0.086 R)
• M31: 15,119,109 km (0.092 R)
• M32: 15,440,744 km (0.056 R)
• M33: 15,873,082 km (0.11 R)
• M34: 15,981,690 km (0.088 R)
• M35: 17,249,682 km (0.062 R)
• M36: 19,009,252 km (0.118 R)
• M37: 19,822,615 km (0.088 R)
• M38: 20,469,626 km (0.042 R)
• M39: 20,885,060 km (0.047 R)
• M40: 21,423,163 km (0.095 R)
• M41: 22,513,283 km (0.106 R)
• M42: 23,003,515 km (0.069 R)
• M43: 24,873,189 km (0.033 R)
• M44: 25,570,914 km (0.107 R)
• M45: 25,698,521 km (0.101 R)
• M46: 27,050,736 km (0.098 R)
• M47: 29,890,851 km (0.057 R)
• M48: 31,653,862 km (0.064 R)
• M49: 34,783,899 km (0.117 R)
• M50: 36,063,259 km (0.095 R)
• M51: 36,206,425 km (0.09 R)
• M52: 36,780,731 km (0.027 R)
• M53: 37,502,989 km (0.114 R)
• M54: 38,375,743 km (0.034 R)
• M55: 38,668,207 km (0.073 R)
• M56: 39,181,777 km (0.086 R)
• M57: 39,549,937 km (0.111 R)
• M58: 39,697,590 km (0.082 R)
• M59: 39,845,243 km (0.101 R)
• M60: 40,884,948 km (0.083 R)
• M61: 42,008,728 km (0.077 R)
• M62: 42,612,205 km (0.11 R)
• M63: 43,980,577 km (0.118 R)
• M64: 44,516,586 km (0.071 R)
• M65: 44,900,903 km (0.108 R)
• M66: 45,750,021 km (0.092 R)
• M67: 46,760,405 km (0.085 R)
• M68: 46,994,526 km (0.104 R)
• M69: 48,014,035 km (0.109 R)
• M70: 48,644,889 km (0.046 R)
• M71: 48,803,164 km (0.074 R)
• M72: 49,676,067 km (0.081 R)
• M73: 51,035,463 km (0.058 R)
• M74: 52,244,962 km (0.092 R)
• M75: 53,382,504 km (0.091 R)
• M76: 53,627,246 km (0.117 R)
• M77: 54,856,941 km (0.118 R)

Planet 4 - Ice Giant

Semi-Major Axis: 13.36 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 357.2

Radius: 4.4

Gravity: 18.45 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 10.53 AU - 16.19 AU

Year: 18017 Days

Day: 23.5 Hours

Environment

Temp: -193 °C

Axial Tilt: 26.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 81,475,424 km

• M1: 74,949 km (0.119 R)
• M2: 241,002 km (0.039 R)
• M3: 307,872 km (0.073 R)
• M4: 381,475 km (0.118 R)
• M5: 731,384 km (0.097 R)
• M6: 1,444,068 km (0.091 R)
• M7: 1,647,222 km (0.096 R)
• M8: 1,996,533 km (0.074 R)
• M9: 2,576,973 km (0.085 R)
• M10: 3,503,732 km (0.04 R)
• M11: 3,571,200 km (0.066 R)
• M12: 3,707,334 km (0.099 R)
• M13: 3,776,000 km (0.034 R)
• M14: 4,232,722 km (0.065 R)
• M15: 4,268,626 km (0.097 R)
• M16: 4,522,493 km (0.089 R)
• M17: 4,595,946 km (0.118 R)
• M18: 4,818,697 km (0.076 R)
• M19: 6,349,831 km (0.116 R)
• M20: 6,639,453 km (0.081 R)
• M21: 7,145,841 km (0.117 R)
• M22: 7,188,626 km (0.102 R)
• M23: 7,360,514 km (0.085 R)
• M24: 7,884,257 km (0.083 R)
• M25: 8,061,530 km (0.062 R)
• M26: 8,510,473 km (0.093 R)
• M27: 8,783,789 km (0.119 R)
• M28: 9,245,448 km (0.115 R)
• M29: 9,526,392 km (0.08 R)
• M30: 9,952,896 km (0.059 R)
• M31: 10,000,767 km (0.065 R)
• M32: 10,144,531 km (0.08 R)
• M33: 10,482,622 km (0.118 R)
• M34: 10,824,603 km (0.086 R)
• M35: 11,519,186 km (0.111 R)
• M36: 12,382,066 km (0.095 R)
• M37: 13,688,205 km (0.082 R)
• M38: 14,764,263 km (0.083 R)
• M39: 14,927,923 km (0.066 R)
• M40: 14,982,676 km (0.107 R)
• M41: 15,037,428 km (0.069 R)
• M42: 15,867,098 km (0.051 R)
• M43: 17,455,229 km (0.066 R)
• M44: 17,628,463 km (0.092 R)
• M45: 17,686,208 km (0.038 R)
• M46: 19,930,476 km (0.074 R)
• M47: 19,990,763 km (0.119 R)
• M48: 20,111,489 km (0.087 R)
• M49: 20,657,521 km (0.077 R)
• M50: 21,455,027 km (0.1 R)
• M51: 21,764,396 km (0.09 R)
• M52: 21,826,479 km (0.047 R)
• M53: 22,262,557 km (0.101 R)
• M54: 22,701,477 km (0.11 R)
• M55: 23,079,959 km (0.105 R)
• M56: 23,715,451 km (0.108 R)
• M57: 23,907,236 km (0.098 R)
• M58: 25,852,906 km (0.073 R)
• M59: 26,578,904 km (0.027 R)
• M60: 27,244,764 km (0.119 R)
• M61: 27,311,634 km (0.065 R)
• M62: 27,646,883 km (0.115 R)
• M63: 27,781,372 km (0.091 R)
• M64: 28,321,570 km (0.102 R)
• M65: 28,525,023 km (0.098 R)
• M66: 28,728,925 km (0.071 R)
• M67: 28,933,275 km (0.089 R)
• M68: 32,198,099 km (0.06 R)
• M69: 32,339,619 km (0.05 R)
• M70: 32,552,197 km (0.057 R)
• M71: 33,192,925 km (0.12 R)
• M72: 34,704,013 km (0.027 R)
• M73: 35,431,358 km (0.116 R)
• M74: 36,605,701 km (0.086 R)
• M75: 37,718,111 km (0.095 R)
• M76: 39,445,219 km (0.101 R)
• M77: 39,596,612 km (0.097 R)
• M78: 40,814,787 km (0.1 R)
• M79: 41,428,587 km (0.085 R)
• M80: 41,890,845 km (0.046 R)
• M81: 42,820,446 km (0.065 R)
• M82: 44,227,713 km (0.076 R)
• M83: 44,542,467 km (0.083 R)
• M84: 45,968,135 km (0.101 R)
• M85: 46,846,723 km (0.102 R)
• M86: 49,270,956 km (0.052 R)
• M87: 51,074,359 km (0.105 R)
• M88: 51,321,943 km (0.065 R)
• M89: 51,735,581 km (0.087 R)
• M90: 51,984,213 km (0.118 R)
• M91: 52,150,117 km (0.062 R)
• M92: 52,233,293 km (0.113 R)
• M93: 53,652,080 km (0.106 R)
• M94: 55,846,381 km (0.108 R)
• M95: 56,442,229 km (0.102 R)
• M96: 56,869,032 km (0.07 R)

Planet 5 - Ice Giant

Semi-Major Axis: 14.86 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 423.2

Radius: 5.5

Gravity: 13.99 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 14.06 AU - 15.66 AU

Year: 21135 Days

Day: 16.4 Hours

Environment

Temp: -198 °C

Axial Tilt: 27.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 81,475,424 km

• M1: 85,420 km (0.116 R)
• M2: 145,858 km (0.112 R)
• M3: 318,195 km (0.113 R)
• M4: 366,365 km (0.1 R)
• M5: 417,378 km (0.09 R)
• M6: 688,300 km (0.097 R)
• M7: 887,863 km (0.064 R)
• M8: 1,559,707 km (0.088 R)
• M9: 1,703,621 km (0.075 R)
• M10: 2,035,129 km (0.111 R)
• M11: 2,288,698 km (0.112 R)
• M12: 2,860,461 km (0.07 R)
• M13: 3,216,653 km (0.095 R)
• M14: 3,437,011 km (0.075 R)
• M15: 4,367,061 km (0.057 R)
• M16: 4,817,799 km (0.11 R)
• M17: 4,943,312 km (0.1 R)
• M18: 5,674,995 km (0.073 R)
• M19: 5,986,009 km (0.085 R)
• M20: 6,671,018 km (0.099 R)
• M21: 7,284,668 km (0.099 R)
• M22: 7,573,841 km (0.107 R)
• M23: 7,622,460 km (0.046 R)
• M24: 8,363,568 km (0.065 R)
• M25: 8,921,568 km (0.118 R)
• M26: 9,230,937 km (0.111 R)
• M27: 10,611,875 km (0.099 R)
• M28: 11,160,001 km (0.075 R)
• M29: 11,717,403 km (0.109 R)
• M30: 13,678,930 km (0.047 R)
• M31: 14,757,830 km (0.101 R)
• M32: 15,926,189 km (0.114 R)
• M33: 16,113,336 km (0.085 R)
• M34: 16,238,550 km (0.065 R)
• M35: 16,301,231 km (0.078 R)
• M36: 16,679,265 km (0.113 R)
• M37: 17,251,626 km (0.104 R)
• M38: 18,219,824 km (0.118 R)
• M39: 18,350,273 km (0.025 R)
• M40: 18,612,069 km (0.069 R)
• M41: 18,809,239 km (0.073 R)
• M42: 19,139,402 km (0.108 R)
• M43: 19,805,412 km (0.108 R)
• M44: 20,343,665 km (0.069 R)
• M45: 21,023,138 km (0.073 R)
• M46: 22,404,525 km (0.082 R)
• M47: 23,601,607 km (0.084 R)
• M48: 24,029,008 km (0.119 R)
• M49: 24,459,102 km (0.093 R)
• M50: 26,351,515 km (0.054 R)
• M51: 26,425,267 km (0.072 R)
• M52: 26,646,822 km (0.101 R)
• M53: 27,839,117 km (0.12 R)
• M54: 30,661,879 km (0.094 R)
• M55: 31,206,116 km (0.079 R)
• M56: 32,225,326 km (0.093 R)
• M57: 33,255,307 km (0.036 R)
• M58: 35,022,956 km (0.083 R)
• M59: 37,068,258 km (0.062 R)
• M60: 37,814,153 km (0.05 R)
• M61: 38,564,835 km (0.051 R)
• M62: 39,742,320 km (0.07 R)
• M63: 40,335,625 km (0.051 R)
• M64: 41,788,370 km (0.085 R)
• M65: 42,046,426 km (0.09 R)
• M66: 42,997,570 km (0.094 R)
• M67: 45,273,552 km (0.096 R)
• M68: 45,538,789 km (0.107 R)
• M69: 48,038,120 km (0.071 R)
• M70: 49,395,272 km (0.075 R)
• M71: 53,728,524 km (0.064 R)
• M72: 54,760,151 km (0.088 R)
• M73: 55,987,751 km (0.097 R)
• M74: 59,144,416 km (0.098 R)
• M75: 61,769,709 km (0.106 R)
• M76: 63,936,784 km (0.096 R)
• M77: 66,529,913 km (0.111 R)

Planet 6 - Ice Giant

Semi-Major Axis: 18.4 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 396.7

Radius: 5.3

Gravity: 14.12 G

Time & Orbit

Eccentricity (e): 0.009

Orbit Range: 18.23 AU - 18.57 AU

Year: 29121 Days

Day: 22.5 Hours

Environment

Temp: -203 °C

Axial Tilt: 0.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 81,475,424 km

• M1: 94,695 km (0.082 R)
• M2: 135,386 km (0.114 R)
• M3: 766,689 km (0.075 R)
• M4: 1,116,000 km (0.116 R)
• M5: 1,839,306 km (0.073 R)
• M6: 4,239,304 km (0.056 R)
• M7: 5,081,989 km (0.061 R)
• M8: 6,076,815 km (0.09 R)
• M9: 7,184,139 km (0.106 R)
• M10: 7,402,103 km (0.059 R)
• M11: 7,677,512 km (0.104 R)
• M12: 10,672,462 km (0.067 R)
• M13: 12,192,376 km (0.105 R)
• M14: 14,390,118 km (0.086 R)
• M15: 14,802,560 km (0.111 R)
• M16: 15,498,788 km (0.09 R)
• M17: 15,568,950 km (0.075 R)
• M18: 16,634,685 km (0.068 R)
• M19: 17,212,581 km (0.12 R)
• M20: 17,358,140 km (0.069 R)
• M21: 17,650,305 km (0.117 R)
• M22: 18,685,971 km (0.054 R)
• M23: 22,542,155 km (0.104 R)
• M24: 23,342,055 km (0.073 R)
• M25: 23,664,588 km (0.049 R)
• M26: 23,826,303 km (0.107 R)
• M27: 24,069,699 km (0.079 R)
• M28: 24,395,523 km (0.1 R)
• M29: 24,477,353 km (0.075 R)
• M30: 25,134,088 km (0.062 R)
• M31: 26,046,635 km (0.078 R)
• M32: 26,548,835 km (0.074 R)
• M33: 26,716,983 km (0.112 R)
• M34: 27,989,313 km (0.07 R)
• M35: 29,629,205 km (0.102 R)
• M36: 29,978,366 km (0.095 R)
• M37: 30,680,728 km (0.105 R)
• M38: 31,566,348 km (0.119 R)
• M39: 32,370,586 km (0.06 R)
• M40: 33,362,719 km (0.116 R)
• M41: 34,364,725 km (0.055 R)
• M42: 36,398,359 km (0.103 R)
• M43: 36,585,206 km (0.088 R)
• M44: 37,335,589 km (0.085 R)
• M45: 38,090,909 km (0.099 R)
• M46: 38,756,171 km (0.079 R)
• M47: 40,194,255 km (0.053 R)
• M48: 40,290,895 km (0.079 R)
• M49: 40,580,816 km (0.034 R)
• M50: 40,677,606 km (0.083 R)
• M51: 41,260,140 km (0.057 R)
• M52: 42,433,286 km (0.115 R)
• M53: 42,531,572 km (0.11 R)
• M54: 43,024,048 km (0.117 R)
• M55: 44,612,479 km (0.083 R)
• M56: 45,012,653 km (0.082 R)
• M57: 47,031,027 km (0.115 R)
• M58: 51,050,872 km (0.108 R)
• M59: 52,099,104 km (0.116 R)
• M60: 53,154,517 km (0.11 R)
• M61: 53,472,562 km (0.066 R)
• M62: 54,110,447 km (0.111 R)
• M63: 54,323,624 km (0.12 R)
• M64: 55,072,063 km (0.119 R)
• M65: 56,687,121 km (0.102 R)
• M66: 56,903,739 km (0.093 R)
• M67: 59,193,783 km (0.075 R)
• M68: 60,847,887 km (0.045 R)
• M69: 61,847,649 km (0.058 R)
• M70: 62,405,350 km (0.079 R)
• M71: 63,189,093 km (0.034 R)
• M72: 63,413,640 km (0.099 R)
• M73: 63,638,336 km (0.097 R)
• M74: 63,975,978 km (0.043 R)
• M75: 66,356,230 km (0.069 R)
• M76: 66,927,095 km (0.082 R)
• M77: 67,270,572 km (0.067 R)
• M78: 67,729,239 km (0.072 R)
• M79: 67,844,130 km (0.104 R)
• M80: 68,649,864 km (0.047 R)
• M81: 68,996,184 km (0.107 R)
• M82: 69,690,467 km (0.092 R)
• M83: 69,922,344 km (0.084 R)
• M84: 71,202,752 km (0.057 R)
• M85: 72,138,786 km (0.105 R)
• M86: 72,256,071 km (0.117 R)
• M87: 73,314,476 km (0.113 R)
• M88: 75,684,854 km (0.056 R)
• M89: 76,879,393 km (0.102 R)
• M90: 77,479,131 km (0.119 R)
• M91: 77,959,938 km (0.081 R)
• M92: 78,200,641 km (0.087 R)
• M93: 80,135,839 km (0.112 R)
• M94: 80,257,313 km (0.11 R)

Kuiper Belt

Range: 30 - 57 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 458 - 15,566 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit