🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.58 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.44

Radius: 1.64

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.083

Orbit Range: 0.53 AU - 0.63 AU

Year: 170 Days

Day: 39.9 Hours

Environment

Temp: 173 °C

Axial Tilt: 26.5 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (2)

Outer Limit: 108,638,907 km

• M1: 107,860 km (0.12 R)
• M2: 358,736 km (0.101 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.21 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.65

Radius: 1.48

Gravity: 1.21 G

Time & Orbit

Eccentricity (e): 0.097

Orbit Range: 1.09 AU - 1.33 AU

Year: 512 Days

Day: 37.4 Hours

Environment

Temp: -30 °C

Axial Tilt: 34.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 108,638,907 km

• M1: 516,262 km (0.088 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.39 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.22

Radius: 1.78

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.171

Orbit Range: 1.15 AU - 1.63 AU

Year: 631 Days

Day: 40.5 Hours

Environment

Temp: -49 °C

Axial Tilt: 8.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 2.71 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.89

Radius: 1.72

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.154

Orbit Range: 2.29 AU - 3.13 AU

Year: 1718 Days

Day: 14.1 Hours

Environment

Temp: -110 °C

Axial Tilt: 39 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 108,638,907 km

• M1: 647,310 km (0.071 R)
• M2: 1,619,995 km (0.067 R)

Planet 5 - Terrestrial

Semi-Major Axis: 3.72 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.71

Radius: 1.24

Gravity: 1.11 G

Time & Orbit

Eccentricity (e): 0.058

Orbit Range: 3.5 AU - 3.94 AU

Year: 2762 Days

Day: 21.7 Hours

Environment

Temp: -134 °C

Axial Tilt: 29.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 4.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 148.9

Radius: 11.3

Gravity: 1.17 G

Time & Orbit

Eccentricity (e): 0.213

Orbit Range: 3.16 AU - 4.86 AU

Year: 3092 Days

Day: 14.6 Hours

Environment

Temp: -144 °C

Axial Tilt: 8.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 108,638,907 km

• M1: 195,225 km (0.092 R)
• M2: 286,330 km (0.072 R)
• M3: 510,278 km (0.113 R)
• M4: 696,079 km (0.025 R)
• M5: 1,094,907 km (0.103 R)
• M6: 1,663,828 km (0.091 R)
• M7: 1,760,318 km (0.046 R)
• M8: 1,839,007 km (0.108 R)
• M9: 2,082,402 km (0.036 R)
• M10: 2,218,686 km (0.094 R)
• M11: 2,358,111 km (0.097 R)
• M12: 2,979,990 km (0.082 R)
• M13: 3,352,339 km (0.088 R)
• M14: 3,842,122 km (0.093 R)
• M15: 3,945,494 km (0.084 R)
• M16: 4,341,181 km (0.088 R)
• M17: 4,749,732 km (0.063 R)
• M18: 4,846,821 km (0.104 R)
• M19: 5,029,032 km (0.117 R)
• M20: 5,156,489 km (0.099 R)
• M21: 5,559,954 km (0.089 R)
• M22: 5,706,560 km (0.119 R)
• M23: 6,275,331 km (0.12 R)
• M24: 7,146,589 km (0.093 R)
• M25: 7,338,224 km (0.114 R)
• M26: 7,515,348 km (0.065 R)
• M27: 7,824,717 km (0.091 R)
• M28: 8,456,169 km (0.095 R)
• M29: 8,709,887 km (0.111 R)
• M30: 8,914,836 km (0.099 R)
• M31: 9,069,521 km (0.078 R)
• M32: 9,945,117 km (0.085 R)
• M33: 10,105,486 km (0.091 R)
• M34: 10,320,907 km (0.097 R)
• M35: 10,939,195 km (0.06 R)
• M36: 11,215,951 km (0.064 R)
• M37: 11,625,849 km (0.099 R)
• M38: 11,738,496 km (0.114 R)
• M39: 11,927,139 km (0.117 R)
• M40: 12,078,682 km (0.085 R)
• M41: 12,962,805 km (0.079 R)
• M42: 13,060,044 km (0.105 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.26 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 880.6

Radius: 11.4

Gravity: 6.78 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 4.06 AU - 4.46 AU

Year: 3385 Days

Day: 11.1 Hours

Environment

Temp: -142 °C

Axial Tilt: 35.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 108,638,907 km

• M1: 179,069 km (0.075 R)
• M2: 440,267 km (0.111 R)
• M3: 648,507 km (0.084 R)
• M4: 732,880 km (0.061 R)
• M5: 961,765 km (0.088 R)
• M6: 1,060,200 km (0.119 R)
• M7: 1,175,241 km (0.11 R)
• M8: 1,254,229 km (0.086 R)
• M9: 1,349,074 km (0.11 R)
• M10: 1,604,288 km (0.073 R)
• M11: 1,692,850 km (0.076 R)
• M12: 1,859,801 km (0.114 R)
• M13: 2,668,826 km (0.112 R)
• M14: 3,046,261 km (0.104 R)
• M15: 3,326,309 km (0.082 R)
• M16: 3,479,198 km (0.052 R)
• M17: 4,032,560 km (0.106 R)
• M18: 4,216,266 km (0.05 R)
• M19: 4,340,433 km (0.061 R)
• M20: 4,528,926 km (0.038 R)
• M21: 4,762,897 km (0.104 R)
• M22: 4,892,299 km (0.078 R)
• M23: 5,287,387 km (0.12 R)
• M24: 5,421,427 km (0.112 R)
• M25: 5,761,463 km (0.073 R)
• M26: 6,132,017 km (0.108 R)
• M27: 6,582,007 km (0.103 R)
• M28: 7,067,303 km (0.037 R)
• M29: 7,165,888 km (0.069 R)
• M30: 7,389,088 km (0.072 R)
• M31: 7,791,655 km (0.119 R)
• M32: 8,124,062 km (0.079 R)
• M33: 8,279,045 km (0.12 R)
• M34: 8,461,106 km (0.111 R)
• M35: 8,565,675 km (0.103 R)
• M36: 9,310,373 km (0.089 R)
• M37: 9,499,764 km (0.106 R)
• M38: 10,103,391 km (0.098 R)
• M39: 10,270,193 km (0.076 R)
• M40: 10,353,968 km (0.076 R)
• M41: 10,662,887 km (0.104 R)
• M42: 11,261,279 km (0.12 R)
• M43: 11,724,584 km (0.112 R)
• M44: 11,958,555 km (0.048 R)
• M45: 12,342,124 km (0.043 R)
• M46: 12,729,732 km (0.114 R)
• M47: 13,030,723 km (0.031 R)
• M48: 13,700,921 km (0.104 R)
• M49: 14,009,392 km (0.05 R)
• M50: 14,195,492 km (0.107 R)
• M51: 14,538,819 km (0.082 R)
• M52: 15,329,593 km (0.114 R)
• M53: 16,361,968 km (0.027 R)
• M54: 16,787,723 km (0.089 R)
• M55: 16,985,492 km (0.101 R)
• M56: 17,084,675 km (0.078 R)
• M57: 17,885,024 km (0.078 R)
• M58: 18,019,662 km (0.07 R)
• M59: 18,561,356 km (0.119 R)
• M60: 19,246,065 km (0.099 R)
• M61: 19,799,727 km (0.058 R)
• M62: 19,904,146 km (0.043 R)
• M63: 20,393,930 km (0.072 R)
• M64: 20,534,552 km (0.095 R)
• M65: 20,781,388 km (0.099 R)
• M66: 20,887,603 km (0.041 R)
• M67: 21,100,331 km (0.106 R)
• M68: 21,313,807 km (0.09 R)
• M69: 21,420,770 km (0.069 R)
• M70: 21,528,031 km (0.059 R)
• M71: 21,814,810 km (0.073 R)
• M72: 22,464,514 km (0.064 R)
• M73: 22,718,980 km (0.073 R)
• M74: 23,304,207 km (0.115 R)
• M75: 23,709,318 km (0.064 R)
• M76: 24,005,372 km (0.079 R)
• M77: 24,116,822 km (0.102 R)
• M78: 24,228,273 km (0.093 R)
• M79: 24,901,164 km (0.118 R)
• M80: 25,051,510 km (0.09 R)

Planet 8 - Gas Giant

Semi-Major Axis: 6.4 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 168.9

Radius: 9.7

Gravity: 1.8 G

Time & Orbit

Eccentricity (e): 0.094

Orbit Range: 5.8 AU - 7 AU

Year: 6234 Days

Day: 8.1 Hours

Environment

Temp: -170 °C

Axial Tilt: 32.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 108,638,907 km

• M1: 136,284 km (0.117 R)
• M2: 217,366 km (0.117 R)
• M3: 457,321 km (0.118 R)
• M4: 559,795 km (0.115 R)
• M5: 661,223 km (0.099 R)
• M6: 749,336 km (0.073 R)
• M7: 884,123 km (0.095 R)
• M8: 949,198 km (0.114 R)
• M9: 1,016,069 km (0.06 R)
• M10: 1,084,585 km (0.104 R)
• M11: 1,287,888 km (0.077 R)
• M12: 1,731,147 km (0.039 R)
• M13: 1,828,236 km (0.076 R)
• M14: 2,086,292 km (0.102 R)
• M15: 2,511,000 km (0.097 R)
• M16: 2,573,831 km (0.109 R)
• M17: 2,847,296 km (0.093 R)
• M18: 3,045,813 km (0.067 R)
• M19: 3,794,849 km (0.082 R)
• M20: 3,958,659 km (0.085 R)
• M21: 4,069,212 km (0.107 R)
• M22: 4,218,211 km (0.116 R)
• M23: 4,312,159 km (0.091 R)
• M24: 4,464,150 km (0.118 R)
• M25: 4,792,966 km (0.092 R)
• M26: 4,930,746 km (0.081 R)
• M27: 5,029,929 km (0.111 R)
• M28: 5,149,757 km (0.114 R)
• M29: 5,494,580 km (0.059 R)
• M30: 5,556,364 km (0.094 R)
• M31: 5,680,381 km (0.104 R)
• M32: 5,847,033 km (0.109 R)
• M33: 5,952,200 km (0.103 R)
• M34: 6,164,180 km (0.114 R)
• M35: 6,314,077 km (0.102 R)
• M36: 6,443,629 km (0.037 R)
• M37: 6,881,652 km (0.091 R)
• M38: 7,081,814 km (0.106 R)
• M39: 7,194,012 km (0.095 R)
• M40: 7,351,838 km (0.113 R)
• M41: 7,809,458 km (0.092 R)
• M42: 8,041,783 km (0.103 R)
• M43: 8,394,535 km (0.112 R)
• M44: 8,656,331 km (0.116 R)
• M45: 9,384,274 km (0.118 R)
• M46: 9,532,227 km (0.111 R)
• M47: 9,805,542 km (0.101 R)
• M48: 10,385,234 km (0.116 R)
• M49: 10,512,841 km (0.029 R)
• M50: 10,692,209 km (0.098 R)
• M51: 10,846,743 km (0.091 R)
• M52: 10,924,385 km (0.067 R)
• M53: 11,184,236 km (0.031 R)
• M54: 11,498,840 km (0.12 R)
• M55: 11,949,429 km (0.08 R)
• M56: 12,704,450 km (0.119 R)
• M57: 12,895,486 km (0.072 R)
• M58: 13,005,141 km (0.1 R)
• M59: 13,142,771 km (0.095 R)
• M60: 13,225,499 km (0.082 R)
• M61: 13,613,855 km (0.073 R)
• M62: 14,316,815 km (0.044 R)
• M63: 14,458,784 km (0.1 R)
• M64: 14,686,921 km (0.119 R)
• M65: 15,436,855 km (0.071 R)
• M66: 15,611,585 km (0.083 R)
• M67: 16,317,537 km (0.115 R)
• M68: 16,763,937 km (0.114 R)
• M69: 17,244,595 km (0.1 R)
• M70: 17,456,276 km (0.092 R)
• M71: 17,577,750 km (0.094 R)
• M72: 17,760,259 km (0.111 R)
• M73: 19,337,619 km (0.112 R)
• M74: 19,841,614 km (0.076 R)
• M75: 20,349,948 km (0.064 R)
• M76: 20,991,424 km (0.108 R)
• M77: 21,185,153 km (0.104 R)
• M78: 21,444,406 km (0.11 R)
• M79: 21,574,407 km (0.119 R)

Planet 9 - Gas Giant

Semi-Major Axis: 9.87 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 674.1

Radius: 11.9

Gravity: 4.76 G

Time & Orbit

Eccentricity (e): 0.047

Orbit Range: 9.41 AU - 10.33 AU

Year: 11938 Days

Day: 9.7 Hours

Environment

Temp: -175 °C

Axial Tilt: 49.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (84)

Outer Limit: 108,638,907 km

• M1: 172,786 km (0.1 R)
• M2: 513,420 km (0.088 R)
• M3: 625,020 km (0.063 R)
• M4: 782,397 km (0.082 R)
• M5: 1,034,768 km (0.098 R)
• M6: 1,865,485 km (0.07 R)
• M7: 2,180,539 km (0.1 R)
• M8: 2,344,498 km (0.091 R)
• M9: 2,428,123 km (0.06 R)
• M10: 2,714,005 km (0.107 R)
• M11: 3,318,829 km (0.073 R)
• M12: 3,413,225 km (0.082 R)
• M13: 3,572,397 km (0.064 R)
• M14: 4,031,513 km (0.097 R)
• M15: 4,474,772 km (0.073 R)
• M16: 5,041,897 km (0.118 R)
• M17: 5,444,914 km (0.114 R)
• M18: 5,556,813 km (0.116 R)
• M19: 6,011,590 km (0.044 R)
• M20: 6,127,080 km (0.095 R)
• M21: 6,636,760 km (0.119 R)
• M22: 7,323,564 km (0.117 R)
• M23: 7,696,511 km (0.12 R)
• M24: 8,118,228 km (0.093 R)
• M25: 8,203,349 km (0.108 R)
• M26: 9,249,487 km (0.051 R)
• M27: 11,085,053 km (0.108 R)
• M28: 11,370,037 km (0.106 R)
• M29: 12,435,323 km (0.075 R)
• M30: 12,930,043 km (0.059 R)
• M31: 13,129,756 km (0.075 R)
• M32: 14,195,043 km (0.1 R)
• M33: 15,605,152 km (0.119 R)
• M34: 15,871,287 km (0.035 R)
• M35: 16,407,894 km (0.076 R)
• M36: 16,678,367 km (0.096 R)
• M37: 17,498,912 km (0.112 R)
• M38: 18,053,172 km (0.06 R)
• M39: 19,980,740 km (0.101 R)
• M40: 20,676,520 km (0.072 R)
• M41: 20,910,342 km (0.059 R)
• M42: 21,144,911 km (0.088 R)
• M43: 21,439,320 km (0.088 R)
• M44: 21,616,743 km (0.094 R)
• M45: 21,913,395 km (0.072 R)
• M46: 22,390,912 km (0.085 R)
• M47: 22,510,740 km (0.118 R)
• M48: 23,174,057 km (0.102 R)
• M49: 23,966,327 km (0.109 R)
• M50: 25,954,034 km (0.118 R)
• M51: 26,649,514 km (0.071 R)
• M52: 27,800,670 km (0.085 R)
• M53: 28,123,353 km (0.099 R)
• M54: 28,577,083 km (0.103 R)
• M55: 29,295,153 km (0.1 R)
• M56: 29,492,023 km (0.082 R)
• M57: 29,887,111 km (0.111 R)
• M58: 31,149,717 km (0.088 R)
• M59: 32,429,677 km (0.079 R)
• M60: 32,633,280 km (0.064 R)
• M61: 33,795,505 km (0.112 R)
• M62: 34,347,073 km (0.077 R)
• M63: 34,554,715 km (0.11 R)
• M64: 34,901,632 km (0.095 R)
• M65: 35,459,183 km (0.11 R)
• M66: 35,599,057 km (0.116 R)
• M67: 36,653,722 km (0.116 R)
• M68: 36,936,761 km (0.095 R)
• M69: 37,433,726 km (0.111 R)
• M70: 37,861,426 km (0.118 R)
• M71: 39,154,400 km (0.1 R)
• M72: 42,153,090 km (0.043 R)
• M73: 42,301,341 km (0.039 R)
• M74: 44,092,776 km (0.07 R)
• M75: 45,073,539 km (0.065 R)
• M76: 45,225,082 km (0.086 R)
• M77: 45,985,189 km (0.115 R)
• M78: 46,137,778 km (0.104 R)
• M79: 46,519,851 km (0.095 R)
• M80: 47,672,353 km (0.119 R)
• M81: 50,398,027 km (0.107 R)
• M82: 50,712,781 km (0.077 R)
• M83: 51,185,959 km (0.119 R)
• M84: 53,334,034 km (0.049 R)

Planet 10 - Ice Giant

Semi-Major Axis: 17.8 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 954

Radius: 3.5

Gravity: 77.88 G

Time & Orbit

Eccentricity (e): 0.029

Orbit Range: 17.28 AU - 18.32 AU

Year: 28913 Days

Day: 20.3 Hours

Environment

Temp: -193 °C

Axial Tilt: 32.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (97)

Outer Limit: 108,638,907 km

• M1: 46,974 km (0.096 R)
• M2: 107,112 km (0.088 R)
• M3: 186,249 km (0.077 R)
• M4: 243,097 km (0.092 R)
• M5: 350,657 km (0.08 R)
• M6: 422,315 km (0.037 R)
• M7: 754,572 km (0.059 R)
• M8: 785,239 km (0.113 R)
• M9: 1,045,839 km (0.06 R)
• M10: 1,679,685 km (0.065 R)
• M11: 2,229,607 km (0.091 R)
• M12: 3,324,214 km (0.081 R)
• M13: 4,005,333 km (0.117 R)
• M14: 4,223,447 km (0.085 R)
• M15: 4,614,346 km (0.089 R)
• M16: 4,728,041 km (0.099 R)
• M17: 5,977,632 km (0.059 R)
• M18: 6,101,648 km (0.087 R)
• M19: 6,415,505 km (0.102 R)
• M20: 6,670,419 km (0.094 R)
• M21: 7,058,925 km (0.084 R)
• M22: 7,722,541 km (0.089 R)
• M23: 7,857,628 km (0.034 R)
• M24: 8,336,641 km (0.042 R)
• M25: 9,975,934 km (0.112 R)
• M26: 12,178,613 km (0.066 R)
• M27: 12,493,816 km (0.11 R)
• M28: 13,699,425 km (0.088 R)
• M29: 13,863,085 km (0.086 R)
• M30: 14,109,622 km (0.084 R)
• M31: 14,606,886 km (0.094 R)
• M32: 15,025,760 km (0.11 R)
• M33: 15,704,186 km (0.051 R)
• M34: 16,915,181 km (0.105 R)
• M35: 17,002,845 km (0.06 R)
• M36: 17,266,736 km (0.095 R)
• M37: 18,155,946 km (0.104 R)
• M38: 20,723,643 km (0.065 R)
• M39: 21,572,761 km (0.071 R)
• M40: 22,241,164 km (0.113 R)
• M41: 24,187,582 km (0.034 R)
• M42: 25,081,130 km (0.068 R)
• M43: 27,516,284 km (0.098 R)
• M44: 28,344,458 km (0.098 R)
• M45: 28,761,687 km (0.09 R)
• M46: 29,602,277 km (0.049 R)
• M47: 29,919,425 km (0.112 R)
• M48: 30,131,554 km (0.082 R)
• M49: 33,263,236 km (0.068 R)
• M50: 34,366,820 km (0.108 R)
• M51: 35,931,913 km (0.1 R)
• M52: 36,044,560 km (0.102 R)
• M53: 37,520,044 km (0.109 R)
• M54: 38,437,826 km (0.068 R)
• M55: 41,353,040 km (0.096 R)
• M56: 41,471,073 km (0.041 R)
• M57: 43,495,731 km (0.093 R)
• M58: 48,259,974 km (0.052 R)
• M59: 48,508,755 km (0.053 R)
• M60: 49,132,578 km (0.09 R)
• M61: 49,884,607 km (0.037 R)
• M62: 51,781,059 km (0.11 R)
• M63: 51,908,367 km (0.07 R)
• M64: 57,215,501 km (0.107 R)
• M65: 58,403,308 km (0.033 R)
• M66: 59,199,767 km (0.085 R)
• M67: 60,401,038 km (0.094 R)
• M68: 62,015,349 km (0.107 R)
• M69: 63,235,319 km (0.028 R)
• M70: 64,600,101 km (0.047 R)
• M71: 65,286,156 km (0.069 R)
• M72: 66,388,842 km (0.116 R)
• M73: 67,497,662 km (0.063 R)
• M74: 67,775,764 km (0.099 R)
• M75: 68,054,315 km (0.086 R)
• M76: 70,014,795 km (0.079 R)
• M77: 70,719,401 km (0.073 R)
• M78: 76,006,340 km (0.086 R)
• M79: 76,295,662 km (0.119 R)
• M80: 78,331,539 km (0.086 R)
• M81: 78,916,467 km (0.118 R)
• M82: 79,356,135 km (0.07 R)
• M83: 83,200,651 km (0.104 R)
• M84: 85,446,115 km (0.114 R)
• M85: 86,198,891 km (0.045 R)
• M86: 86,500,780 km (0.057 R)
• M87: 97,124,323 km (0.068 R)
• M88: 97,752,634 km (0.061 R)
• M89: 98,855,470 km (0.061 R)
• M90: 99,487,670 km (0.108 R)
• M91: 99,645,795 km (0.112 R)
• M92: 102,029,189 km (0.108 R)
• M93: 102,348,430 km (0.112 R)
• M94: 103,788,908 km (0.054 R)
• M95: 106,528,195 km (0.104 R)
• M96: 106,690,060 km (0.075 R)
• M97: 107,176,103 km (0.093 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: 296 - 10,855 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit