🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.74 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.16

Radius: 1.36

Gravity: 1.17 G

Time & Orbit

Eccentricity (e): 0.017

Orbit Range: 0.73 AU - 0.75 AU

Year: 226 Days

Day: 15.3 Hours

Environment

Temp: 200 °C

Axial Tilt: 37.9 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (2)

Outer Limit: 30,332,812 km

• M1: 55,950 km (0.079 R)
• M2: 162,762 km (0.088 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.82 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.77

Radius: 0.9

Gravity: 0.95 G

Time & Orbit

Eccentricity (e): 0.024

Orbit Range: 0.8 AU - 0.84 AU

Year: 263 Days

Day: 27 Hours

Environment

Temp: 152 °C

Axial Tilt: 42.1 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 3 - Terrestrial

Semi-Major Axis: 4.03 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.2

Radius: 1.08

Gravity: 1.03 G

Time & Orbit

Eccentricity (e): 0.01

Orbit Range: 3.99 AU - 4.07 AU

Year: 2870 Days

Day: 34.6 Hours

Environment

Temp: -119 °C

Axial Tilt: 13.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 30,332,812 km

• M1: 2,514,142 km (0.083 R)

Planet 4 - Gas Giant

Semi-Major Axis: 6.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 948.3

Radius: 8.3

Gravity: 13.77 G

Time & Orbit

Eccentricity (e): 0.023

Orbit Range: 5.99 AU - 6.27 AU

Year: 5384 Days

Day: 12.6 Hours

Environment

Temp: -136 °C

Axial Tilt: 19.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 30,332,812 km

• M1: 109,057 km (0.063 R)
• M2: 167,998 km (0.102 R)
• M3: 277,354 km (0.113 R)
• M4: 451,038 km (0.059 R)
• M5: 533,316 km (0.055 R)
• M6: 701,016 km (0.105 R)
• M7: 1,023,549 km (0.1 R)
• M8: 1,102,985 km (0.107 R)
• M9: 1,218,026 km (0.083 R)
• M10: 1,736,532 km (0.115 R)
• M11: 1,910,514 km (0.086 R)
• M12: 2,423,186 km (0.032 R)
• M13: 2,487,513 km (0.044 R)
• M14: 2,661,945 km (0.115 R)
• M15: 3,399,312 km (0.111 R)
• M16: 3,966,438 km (0.118 R)
• M17: 4,093,746 km (0.112 R)
• M18: 4,248,131 km (0.033 R)
• M19: 4,326,071 km (0.063 R)
• M20: 4,616,141 km (0.078 R)
• M21: 4,776,959 km (0.106 R)
• M22: 5,131,805 km (0.074 R)
• M23: 5,580,300 km (0.119 R)
• M24: 5,637,297 km (0.119 R)
• M25: 6,847,095 km (0.108 R)
• M26: 6,999,984 km (0.1 R)
• M27: 7,123,103 km (0.084 R)
• M28: 7,216,003 km (0.056 R)
• M29: 7,845,212 km (0.065 R)
• M30: 9,055,159 km (0.115 R)
• M31: 9,189,498 km (0.104 R)
• M32: 9,836,359 km (0.1 R)
• M33: 9,974,288 km (0.069 R)
• M34: 10,497,731 km (0.109 R)
• M35: 10,638,952 km (0.112 R)
• M36: 10,745,166 km (0.119 R)
• M37: 11,680,602 km (0.047 R)
• M38: 12,084,217 km (0.071 R)
• M39: 12,642,067 km (0.109 R)
• M40: 12,980,757 km (0.04 R)
• M41: 13,056,453 km (0.117 R)
• M42: 13,132,299 km (0.079 R)
• M43: 15,715,406 km (0.097 R)
• M44: 16,364,810 km (0.072 R)
• M45: 18,195,290 km (0.12 R)
• M46: 18,279,962 km (0.101 R)
• M47: 20,264,976 km (0.085 R)
• M48: 20,794,104 km (0.099 R)
• M49: 20,971,378 km (0.116 R)
• M50: 21,730,736 km (0.076 R)
• M51: 21,865,674 km (0.114 R)
• M52: 22,362,787 km (0.088 R)
• M53: 22,499,071 km (0.116 R)
• M54: 22,681,132 km (0.085 R)
• M55: 22,909,418 km (0.088 R)
• M56: 23,552,689 km (0.087 R)
• M57: 24,951,130 km (0.047 R)
• M58: 25,139,473 km (0.088 R)
• M59: 26,184,564 km (0.076 R)
• M60: 26,616,304 km (0.115 R)
• M61: 28,415,218 km (0.117 R)
• M62: 28,513,653 km (0.041 R)
• M63: 28,809,408 km (0.096 R)
• M64: 29,155,727 km (0.091 R)
• M65: 29,702,807 km (0.119 R)
• M66: 29,852,554 km (0.097 R)
• M67: 30,102,832 km (0.059 R)
• M68: 30,454,237 km (0.079 R)
• M69: 31,110,523 km (0.102 R)
• M70: 31,669,570 km (0.042 R)
• M71: 32,283,220 km (0.064 R)
• M72: 33,107,355 km (0.097 R)
• M73: 33,574,101 km (0.107 R)
• M74: 34,304,288 km (0.108 R)
• M75: 34,566,383 km (0.036 R)
• M76: 34,723,910 km (0.111 R)
• M77: 34,776,568 km (0.036 R)
• M78: 35,303,751 km (0.049 R)

Planet 5 - Gas Giant

Semi-Major Axis: 6.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 697.7

Radius: 8.9

Gravity: 8.81 G

Time & Orbit

Eccentricity (e): 0.133

Orbit Range: 5.33 AU - 6.97 AU

Year: 5411 Days

Day: 12.4 Hours

Environment

Temp: -146 °C

Axial Tilt: 6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 30,332,812 km

• M1: 115,938 km (0.041 R)
• M2: 284,834 km (0.095 R)
• M3: 405,261 km (0.108 R)
• M4: 467,493 km (0.104 R)
• M5: 740,061 km (0.081 R)
• M6: 832,811 km (0.062 R)
• M7: 901,477 km (0.032 R)
• M8: 1,001,259 km (0.081 R)
• M9: 1,119,890 km (0.081 R)
• M10: 1,227,600 km (0.106 R)
• M11: 1,420,731 km (0.116 R)
• M12: 1,836,314 km (0.06 R)
• M13: 1,909,318 km (0.065 R)
• M14: 2,077,017 km (0.051 R)
• M15: 2,367,237 km (0.111 R)
• M16: 2,670,621 km (0.087 R)
• M17: 2,837,572 km (0.095 R)
• M18: 3,181,648 km (0.111 R)
• M19: 3,607,852 km (0.096 R)
• M20: 3,792,605 km (0.044 R)
• M21: 3,933,377 km (0.074 R)
• M22: 4,292,711 km (0.115 R)
• M23: 5,120,137 km (0.069 R)
• M24: 5,302,048 km (0.116 R)
• M25: 5,806,342 km (0.078 R)
• M26: 5,941,579 km (0.061 R)
• M27: 6,078,012 km (0.104 R)
• M28: 6,187,817 km (0.118 R)
• M29: 6,493,296 km (0.118 R)
• M30: 6,746,864 km (0.108 R)
• M31: 7,351,239 km (0.082 R)
• M32: 7,615,579 km (0.119 R)
• M33: 7,704,440 km (0.045 R)
• M34: 7,942,899 km (0.115 R)
• M35: 8,032,957 km (0.096 R)
• M36: 8,214,120 km (0.105 R)
• M37: 8,983,651 km (0.09 R)
• M38: 9,679,880 km (0.119 R)
• M39: 9,808,235 km (0.091 R)
• M40: 10,131,815 km (0.114 R)
• M41: 10,426,074 km (0.066 R)
• M42: 11,090,139 km (0.073 R)
• M43: 11,258,137 km (0.034 R)
• M44: 11,563,018 km (0.08 R)
• M45: 11,733,559 km (0.039 R)
• M46: 11,939,256 km (0.1 R)
• M47: 12,180,707 km (0.115 R)
• M48: 12,388,948 km (0.108 R)
• M49: 12,774,013 km (0.025 R)
• M50: 13,663,522 km (0.09 R)
• M51: 13,843,787 km (0.099 R)
• M52: 14,389,370 km (0.086 R)
• M53: 15,878,617 km (0.108 R)
• M54: 16,373,188 km (0.111 R)
• M55: 16,564,673 km (0.1 R)
• M56: 16,834,099 km (0.094 R)
• M57: 16,988,783 km (0.113 R)
• M58: 17,143,766 km (0.033 R)
• M59: 17,260,453 km (0.092 R)
• M60: 18,005,151 km (0.08 R)
• M61: 18,361,643 km (0.03 R)
• M62: 18,840,505 km (0.089 R)
• M63: 18,960,782 km (0.079 R)
• M64: 19,729,117 km (0.09 R)
• M65: 19,973,859 km (0.113 R)
• M66: 20,096,529 km (0.088 R)
• M67: 20,921,113 km (0.07 R)
• M68: 21,004,289 km (0.069 R)
• M69: 21,254,117 km (0.118 R)
• M70: 21,630,805 km (0.109 R)
• M71: 21,798,953 km (0.066 R)
• M72: 22,221,118 km (0.06 R)
• M73: 23,073,676 km (0.082 R)
• M74: 23,590,387 km (0.11 R)
• M75: 24,154,371 km (0.119 R)
• M76: 24,898,621 km (0.075 R)
• M77: 26,096,152 km (0.062 R)
• M78: 27,585,099 km (0.093 R)
• M79: 28,500,938 km (0.054 R)
• M80: 28,823,770 km (0.086 R)
• M81: 29,194,174 km (0.057 R)
• M82: 29,333,599 km (0.111 R)
• M83: 30,644,825 km (0.1 R)
• M84: 30,928,163 km (0.09 R)
• M85: 31,022,858 km (0.106 R)

Planet 6 - Gas Giant

Semi-Major Axis: 10.39 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 385.4

Radius: 14.5

Gravity: 1.83 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 8.09 AU - 12.69 AU

Year: 11881 Days

Day: 8.4 Hours

Environment

Temp: -165 °C

Axial Tilt: 22.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 30,332,812 km

• M1: 287,078 km (0.081 R)
• M2: 830,119 km (0.106 R)
• M3: 999,164 km (0.057 R)
• M4: 1,334,413 km (0.079 R)
• M5: 1,972,298 km (0.104 R)
• M6: 2,087,339 km (0.115 R)
• M7: 2,671,968 km (0.071 R)
• M8: 2,904,293 km (0.066 R)
• M9: 3,612,938 km (0.095 R)
• M10: 3,755,355 km (0.038 R)
• M11: 3,870,695 km (0.025 R)
• M12: 3,987,232 km (0.079 R)
• M13: 4,283,735 km (0.116 R)
• M14: 4,898,582 km (0.116 R)
• M15: 5,739,622 km (0.112 R)
• M16: 5,873,063 km (0.116 R)
• M17: 5,973,892 km (0.053 R)
• M18: 6,348,335 km (0.103 R)
• M19: 6,942,089 km (0.097 R)
• M20: 7,590,446 km (0.062 R)
• M21: 7,810,804 km (0.099 R)
• M22: 8,983,651 km (0.096 R)
• M23: 9,256,069 km (0.076 R)
• M24: 10,373,116 km (0.111 R)
• M25: 10,495,338 km (0.101 R)
• M26: 10,864,994 km (0.093 R)
• M27: 11,744,031 km (0.118 R)
• M28: 12,689,490 km (0.071 R)
• M29: 12,951,585 km (0.057 R)
• M30: 13,083,381 km (0.082 R)
• M31: 13,481,311 km (0.114 R)
• M32: 14,063,097 km (0.091 R)
• M33: 14,698,888 km (0.056 R)
• M34: 14,974,298 km (0.068 R)
• M35: 15,251,353 km (0.116 R)
• M36: 15,904,498 km (0.089 R)
• M37: 16,139,965 km (0.083 R)
• M38: 16,471,773 km (0.107 R)
• M39: 17,093,651 km (0.067 R)
• M40: 18,016,520 km (0.028 R)
• M41: 18,262,010 km (0.09 R)
• M42: 18,607,731 km (0.086 R)
• M43: 18,806,248 km (0.098 R)
• M44: 19,255,490 km (0.105 R)
• M45: 20,113,583 km (0.114 R)
• M46: 20,317,336 km (0.092 R)
• M47: 21,710,541 km (0.113 R)
• M48: 22,339,749 km (0.087 R)
• M49: 23,187,820 km (0.117 R)
• M50: 23,294,632 km (0.086 R)
• M51: 24,425,443 km (0.062 R)
• M52: 24,697,412 km (0.089 R)
• M53: 24,915,675 km (0.069 R)
• M54: 26,016,566 km (0.083 R)
• M55: 26,796,569 km (0.106 R)
• M56: 27,754,145 km (0.069 R)
• M57: 27,867,540 km (0.112 R)
• M58: 28,208,623 km (0.076 R)
• M59: 29,182,655 km (0.078 R)
• M60: 29,355,740 km (0.098 R)
• M61: 29,471,229 km (0.047 R)
• M62: 29,818,895 km (0.079 R)
• M63: 30,167,757 km (0.117 R)
• M64: 31,104,838 km (0.117 R)
• M65: 31,458,637 km (0.057 R)
• M66: 32,707,779 km (0.078 R)
• M67: 33,067,562 km (0.083 R)
• M68: 33,428,841 km (0.071 R)
• M69: 33,730,729 km (0.109 R)
• M70: 33,912,341 km (0.064 R)
• M71: 34,581,193 km (0.077 R)
• M72: 35,377,054 km (0.056 R)
• M73: 35,684,777 km (0.114 R)
• M74: 36,675,564 km (0.09 R)
• M75: 37,989,781 km (0.114 R)
• M76: 38,557,654 km (0.116 R)
• M77: 39,510,443 km (0.106 R)
• M78: 39,638,050 km (0.085 R)
• M79: 39,829,835 km (0.114 R)
• M80: 41,568,910 km (0.039 R)
• M81: 41,763,686 km (0.098 R)
• M82: 42,873,104 km (0.082 R)
• M83: 43,332,818 km (0.076 R)
• M84: 43,794,029 km (0.067 R)

Planet 7 - Gas Giant

Semi-Major Axis: 12.29 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 814.5

Radius: 14.6

Gravity: 3.82 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 11.88 AU - 12.7 AU

Year: 15285 Days

Day: 5.7 Hours

Environment

Temp: -189 °C

Axial Tilt: 29.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 30,332,812 km

• M1: 212,728 km (0.118 R)
• M2: 305,030 km (0.114 R)
• M3: 431,440 km (0.097 R)
• M4: 530,773 km (0.1 R)
• M5: 621,579 km (0.082 R)
• M6: 823,087 km (0.056 R)
• M7: 1,144,573 km (0.091 R)
• M8: 1,320,949 km (0.077 R)
• M9: 1,479,822 km (0.099 R)
• M10: 1,817,614 km (0.085 R)
• M11: 2,056,821 km (0.096 R)
• M12: 3,151,429 km (0.079 R)
• M13: 3,404,399 km (0.074 R)
• M14: 3,701,799 km (0.11 R)
• M15: 4,085,518 km (0.092 R)
• M16: 4,282,389 km (0.098 R)
• M17: 4,975,176 km (0.096 R)
• M18: 5,313,567 km (0.094 R)
• M19: 6,237,334 km (0.049 R)
• M20: 6,556,426 km (0.117 R)
• M21: 6,741,179 km (0.118 R)
• M22: 7,642,506 km (0.113 R)
• M23: 8,033,406 km (0.115 R)
• M24: 8,330,956 km (0.112 R)
• M25: 8,481,002 km (0.117 R)
• M26: 8,834,951 km (0.117 R)
• M27: 10,459,883 km (0.038 R)
• M28: 10,622,047 km (0.118 R)
• M29: 11,003,671 km (0.099 R)
• M30: 11,334,283 km (0.115 R)
• M31: 12,175,472 km (0.095 R)
• M32: 12,747,534 km (0.072 R)
• M33: 13,386,765 km (0.077 R)
• M34: 13,562,992 km (0.049 R)
• M35: 15,613,380 km (0.115 R)
• M36: 16,485,685 km (0.093 R)
• M37: 17,309,670 km (0.115 R)
• M38: 17,952,792 km (0.119 R)
• M39: 18,669,216 km (0.072 R)
• M40: 20,062,870 km (0.105 R)
• M41: 20,806,371 km (0.097 R)
• M42: 21,215,671 km (0.115 R)
• M43: 22,459,577 km (0.101 R)
• M44: 23,090,282 km (0.103 R)
• M45: 23,585,002 km (0.07 R)
• M46: 24,083,163 km (0.051 R)
• M47: 24,226,178 km (0.084 R)
• M48: 24,584,914 km (0.105 R)
• M49: 24,728,827 km (0.12 R)
• M50: 26,699,779 km (0.117 R)
• M51: 27,816,527 km (0.082 R)
• M52: 28,116,920 km (0.113 R)
• M53: 28,418,360 km (0.117 R)
• M54: 29,482,000 km (0.107 R)
• M55: 30,018,608 km (0.103 R)
• M56: 32,040,274 km (0.073 R)
• M57: 32,355,177 km (0.111 R)
• M58: 33,545,228 km (0.105 R)
• M59: 33,704,999 km (0.11 R)
• M60: 34,105,472 km (0.052 R)
• M61: 38,447,102 km (0.049 R)
• M62: 40,810,150 km (0.07 R)
• M63: 42,009,176 km (0.068 R)
• M64: 42,699,571 km (0.108 R)
• M65: 43,046,189 km (0.102 R)
• M66: 43,393,705 km (0.103 R)
• M67: 44,617,565 km (0.098 R)
• M68: 45,145,496 km (0.103 R)
• M69: 46,385,363 km (0.09 R)
• M70: 46,563,384 km (0.086 R)
• M71: 47,457,082 km (0.077 R)
• M72: 48,176,199 km (0.1 R)
• M73: 51,917,343 km (0.052 R)
• M74: 52,565,401 km (0.104 R)
• M75: 53,775,947 km (0.111 R)
• M76: 54,244,038 km (0.034 R)
• M77: 54,337,836 km (0.067 R)
• M78: 54,619,529 km (0.106 R)
• M79: 55,090,014 km (0.1 R)
• M80: 55,561,846 km (0.066 R)
• M81: 58,132,985 km (0.117 R)
• M82: 58,902,217 km (0.077 R)
• M83: 60,256,526 km (0.101 R)
• M84: 60,742,719 km (0.1 R)
• M85: 61,621,158 km (0.073 R)
• M86: 63,390,602 km (0.093 R)
• M87: 64,083,090 km (0.094 R)
• M88: 64,778,272 km (0.071 R)
• M89: 65,975,653 km (0.053 R)
• M90: 66,175,964 km (0.047 R)

Planet 8 - Ice Giant

Semi-Major Axis: 14.42 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 46

Radius: 5.5

Gravity: 1.52 G

Time & Orbit

Eccentricity (e): 0.223

Orbit Range: 11.2 AU - 17.64 AU

Year: 19426 Days

Day: 17.9 Hours

Environment

Temp: -181 °C

Axial Tilt: 41.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (72)

Outer Limit: 30,332,812 km

• M1: 71,059 km (0.074 R)
• M2: 153,936 km (0.119 R)
• M3: 416,929 km (0.116 R)
• M4: 593,305 km (0.098 R)
• M5: 805,136 km (0.106 R)
• M6: 872,006 km (0.081 R)
• M7: 982,708 km (0.099 R)
• M8: 1,127,669 km (0.116 R)
• M9: 1,569,581 km (0.03 R)
• M10: 1,739,374 km (0.031 R)
• M11: 1,861,895 km (0.108 R)
• M12: 2,060,112 km (0.069 R)
• M13: 2,284,060 km (0.081 R)
• M14: 2,594,625 km (0.081 R)
• M15: 3,001,681 km (0.087 R)
• M16: 3,276,941 km (0.106 R)
• M17: 3,738,600 km (0.12 R)
• M18: 4,314,403 km (0.105 R)
• M19: 4,600,583 km (0.068 R)
• M20: 5,624,132 km (0.068 R)
• M21: 5,936,492 km (0.097 R)
• M22: 5,989,151 km (0.108 R)
• M23: 6,361,949 km (0.114 R)
• M24: 6,742,226 km (0.05 R)
• M25: 7,157,809 km (0.118 R)
• M26: 7,897,720 km (0.074 R)
• M27: 8,071,852 km (0.078 R)
• M28: 8,188,688 km (0.106 R)
• M29: 8,691,487 km (0.113 R)
• M30: 9,052,466 km (0.094 R)
• M31: 9,143,422 km (0.034 R)
• M32: 9,295,862 km (0.048 R)
• M33: 10,070,031 km (0.07 R)
• M34: 10,512,691 km (0.099 R)
• M35: 10,864,994 km (0.061 R)
• M36: 11,646,793 km (0.074 R)
• M37: 12,077,784 km (0.055 R)
• M38: 13,714,235 km (0.071 R)
• M39: 14,558,117 km (0.037 R)
• M40: 14,629,176 km (0.04 R)
• M41: 15,563,714 km (0.099 R)
• M42: 15,672,920 km (0.078 R)
• M43: 15,818,628 km (0.043 R)
• M44: 17,452,387 km (0.112 R)
• M45: 17,527,934 km (0.111 R)
• M46: 18,021,457 km (0.102 R)
• M47: 18,289,088 km (0.054 R)
• M48: 18,404,278 km (0.118 R)
• M49: 18,481,171 km (0.079 R)
• M50: 18,596,661 km (0.119 R)
• M51: 18,828,388 km (0.116 R)
• M52: 19,138,953 km (0.039 R)
• M53: 19,765,020 km (0.029 R)
• M54: 20,517,198 km (0.049 R)
• M55: 20,957,016 km (0.032 R)
• M56: 21,198,168 km (0.109 R)
• M57: 22,294,720 km (0.085 R)
• M58: 22,417,839 km (0.1 R)
• M59: 22,705,666 km (0.025 R)
• M60: 23,785,463 km (0.061 R)
• M61: 24,037,087 km (0.027 R)
• M62: 24,966,987 km (0.082 R)
• M63: 25,350,706 km (0.057 R)
• M64: 25,650,649 km (0.119 R)
• M65: 25,951,640 km (0.108 R)
• M66: 27,080,057 km (0.102 R)
• M67: 27,123,889 km (0.05 R)
• M68: 28,535,195 km (0.109 R)
• M69: 28,891,837 km (0.042 R)
• M70: 29,609,308 km (0.04 R)
• M71: 29,744,545 km (0.109 R)
• M72: 30,287,435 km (0.086 R)

Kuiper Belt

Range: 30.9 - 51.9 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 324 - 16,971 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit