🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.61 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.27

Radius: 1.61

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.217

Orbit Range: 0.48 AU - 0.74 AU

Year: 171 Days

Day: 19.4 Hours

Environment

Temp: 215 °C

Axial Tilt: 22 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 2.3 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.75

Radius: 1.7

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 2.14 AU - 2.46 AU

Year: 1249 Days

Day: 31.3 Hours

Environment

Temp: -74 °C

Axial Tilt: 1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 4.33 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.23

Radius: 0.56

Gravity: 0.73 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 3.82 AU - 4.84 AU

Year: 3227 Days

Day: 24.7 Hours

Environment

Temp: -135 °C

Axial Tilt: 14.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 5.57 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 292

Radius: 11.5

Gravity: 2.21 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 5.22 AU - 5.92 AU

Year: 4708 Days

Day: 11.8 Hours

Environment

Temp: -150 °C

Axial Tilt: 4.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 90,132,119 km

• M1: 161,566 km (0.077 R)
• M2: 297,401 km (0.055 R)
• M3: 999,912 km (0.054 R)
• M4: 1,218,923 km (0.108 R)
• M5: 1,352,963 km (0.036 R)
• M6: 1,479,373 km (0.084 R)
• M7: 1,703,770 km (0.115 R)
• M8: 1,785,600 km (0.09 R)
• M9: 1,967,810 km (0.102 R)
• M10: 2,053,979 km (0.079 R)
• M11: 2,126,833 km (0.038 R)
• M12: 2,200,585 km (0.098 R)
• M13: 2,504,268 km (0.047 R)
• M14: 2,582,358 km (0.066 R)
• M15: 2,709,068 km (0.071 R)
• M16: 2,919,552 km (0.081 R)
• M17: 3,001,831 km (0.053 R)
• M18: 3,635,976 km (0.059 R)
• M19: 3,868,451 km (0.105 R)
• M20: 4,032,411 km (0.081 R)
• M21: 4,310,812 km (0.101 R)
• M22: 4,405,059 km (0.12 R)
• M23: 4,595,647 km (0.112 R)
• M24: 4,672,689 km (0.074 R)
• M25: 4,847,420 km (0.105 R)
• M26: 5,024,544 km (0.064 R)
• M27: 5,123,727 km (0.094 R)
• M28: 5,344,534 km (0.025 R)
• M29: 5,486,652 km (0.084 R)
• M30: 5,983,466 km (0.032 R)
• M31: 6,088,933 km (0.103 R)
• M32: 6,194,848 km (0.049 R)
• M33: 6,365,689 km (0.08 R)
• M34: 6,516,633 km (0.092 R)
• M35: 6,976,198 km (0.083 R)
• M36: 7,221,089 km (0.07 R)
• M37: 8,019,343 km (0.108 R)
• M38: 8,182,405 km (0.087 R)
• M39: 8,869,508 km (0.112 R)
• M40: 9,086,575 km (0.074 R)
• M41: 9,159,429 km (0.079 R)
• M42: 9,232,283 km (0.096 R)
• M43: 9,329,821 km (0.082 R)
• M44: 9,797,913 km (0.03 R)
• M45: 9,872,562 km (0.106 R)
• M46: 10,072,574 km (0.076 R)
• M47: 10,198,087 km (0.034 R)
• M48: 10,885,639 km (0.092 R)
• M49: 11,535,492 km (0.087 R)
• M50: 11,878,520 km (0.046 R)
• M51: 12,224,839 km (0.11 R)
• M52: 12,305,173 km (0.054 R)
• M53: 12,547,372 km (0.108 R)
• M54: 12,764,139 km (0.079 R)
• M55: 13,146,212 km (0.109 R)
• M56: 13,228,641 km (0.113 R)
• M57: 14,005,951 km (0.057 R)
• M58: 14,626,932 km (0.074 R)
• M59: 14,769,349 km (0.114 R)
• M60: 15,228,315 km (0.071 R)
• M61: 15,575,532 km (0.081 R)
• M62: 15,866,799 km (0.117 R)
• M63: 16,455,018 km (0.113 R)
• M64: 16,692,280 km (0.079 R)
• M65: 17,652,549 km (0.098 R)
• M66: 18,692,553 km (0.078 R)
• M67: 19,095,570 km (0.115 R)
• M68: 19,313,683 km (0.083 R)
• M69: 20,004,676 km (0.071 R)
• M70: 20,257,945 km (0.08 R)
• M71: 20,544,126 km (0.053 R)
• M72: 20,735,761 km (0.096 R)
• M73: 21,056,349 km (0.099 R)
• M74: 21,346,270 km (0.116 R)

Planet 5 - Gas Giant

Semi-Major Axis: 6.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 569.8

Radius: 12.3

Gravity: 3.77 G

Time & Orbit

Eccentricity (e): 0.242

Orbit Range: 4.56 AU - 7.48 AU

Year: 5290 Days

Day: 12.9 Hours

Environment

Temp: -140 °C

Axial Tilt: 14.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 90,132,119 km

• M1: 155,582 km (0.102 R)
• M2: 248,632 km (0.081 R)
• M3: 639,082 km (0.099 R)
• M4: 867,069 km (0.084 R)
• M5: 958,174 km (0.067 R)
• M6: 1,066,633 km (0.072 R)
• M7: 1,543,850 km (0.067 R)
• M8: 1,840,054 km (0.071 R)
• M9: 2,047,995 km (0.113 R)
• M10: 2,208,962 km (0.119 R)
• M11: 2,563,210 km (0.118 R)
• M12: 2,975,801 km (0.101 R)
• M13: 3,325,411 km (0.041 R)
• M14: 3,537,391 km (0.057 R)
• M15: 3,952,376 km (0.115 R)
• M16: 4,154,632 km (0.038 R)
• M17: 4,452,631 km (0.113 R)
• M18: 4,686,602 km (0.079 R)
• M19: 4,997,018 km (0.08 R)
• M20: 5,265,097 km (0.1 R)
• M21: 5,663,327 km (0.1 R)
• M22: 5,764,305 km (0.086 R)
• M23: 6,045,549 km (0.034 R)
• M24: 6,174,802 km (0.104 R)
• M25: 7,024,218 km (0.087 R)
• M26: 7,297,235 km (0.044 R)
• M27: 7,769,515 km (0.071 R)
• M28: 8,568,816 km (0.044 R)
• M29: 9,007,886 km (0.117 R)
• M30: 9,185,608 km (0.081 R)
• M31: 9,304,688 km (0.074 R)
• M32: 9,604,632 km (0.094 R)
• M33: 9,846,981 km (0.095 R)
• M34: 10,306,844 km (0.062 R)
• M35: 10,555,027 km (0.114 R)
• M36: 10,836,571 km (0.067 R)
• M37: 11,152,372 km (0.097 R)
• M38: 11,599,520 km (0.077 R)
• M39: 12,544,529 km (0.113 R)
• M40: 12,842,828 km (0.101 R)
• M41: 12,976,269 km (0.103 R)
• M42: 13,717,826 km (0.049 R)
• M43: 13,956,733 km (0.119 R)
• M44: 14,542,559 km (0.101 R)
• M45: 15,418,753 km (0.09 R)
• M46: 15,738,444 km (0.084 R)
• M47: 15,988,572 km (0.09 R)
• M48: 16,096,132 km (0.096 R)
• M49: 16,240,046 km (0.105 R)
• M50: 16,892,592 km (0.112 R)
• M51: 18,260,963 km (0.091 R)
• M52: 18,448,709 km (0.088 R)
• M53: 19,053,383 km (0.096 R)
• M54: 19,358,264 km (0.095 R)
• M55: 19,587,896 km (0.12 R)
• M56: 20,360,121 km (0.102 R)
• M57: 20,945,796 km (0.111 R)
• M58: 21,814,960 km (0.083 R)
• M59: 22,173,845 km (0.046 R)
• M60: 22,574,917 km (0.094 R)
• M61: 22,816,667 km (0.08 R)
• M62: 23,059,465 km (0.101 R)
• M63: 23,303,010 km (0.029 R)
• M64: 23,669,824 km (0.077 R)
• M65: 23,997,593 km (0.106 R)
• M66: 24,121,011 km (0.119 R)
• M67: 24,616,180 km (0.085 R)
• M68: 25,281,891 km (0.114 R)
• M69: 25,911,249 km (0.082 R)
• M70: 26,418,535 km (0.086 R)
• M71: 26,886,477 km (0.093 R)
• M72: 27,442,981 km (0.095 R)
• M73: 27,873,674 km (0.075 R)
• M74: 28,263,077 km (0.093 R)
• M75: 28,698,108 km (0.064 R)
• M76: 28,916,371 km (0.111 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 775.3

Radius: 11.2

Gravity: 6.18 G

Time & Orbit

Eccentricity (e): 0.067

Orbit Range: 6.51 AU - 7.45 AU

Year: 6605 Days

Day: 14.2 Hours

Environment

Temp: -152 °C

Axial Tilt: 37 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 90,132,119 km

• M1: 201,808 km (0.11 R)
• M2: 386,411 km (0.08 R)
• M3: 487,689 km (0.064 R)
• M4: 883,824 km (0.062 R)
• M5: 1,297,313 km (0.051 R)
• M6: 1,368,821 km (0.076 R)
• M7: 1,669,213 km (0.114 R)
• M8: 1,787,395 km (0.094 R)
• M9: 2,442,634 km (0.051 R)
• M10: 2,926,284 km (0.084 R)
• M11: 3,021,877 km (0.09 R)
• M12: 3,290,106 km (0.047 R)
• M13: 3,668,439 km (0.056 R)
• M14: 4,087,463 km (0.114 R)
• M15: 5,085,729 km (0.111 R)
• M16: 5,288,434 km (0.117 R)
• M17: 5,434,891 km (0.091 R)
• M18: 5,612,314 km (0.087 R)
• M19: 5,912,407 km (0.111 R)
• M20: 6,187,069 km (0.094 R)
• M21: 6,622,698 km (0.088 R)
• M22: 6,972,009 km (0.09 R)
• M23: 7,068,200 km (0.078 R)
• M24: 7,229,766 km (0.034 R)
• M25: 8,089,355 km (0.102 R)
• M26: 8,703,305 km (0.108 R)
• M27: 8,876,539 km (0.103 R)
• M28: 9,545,391 km (0.111 R)
• M29: 10,012,286 km (0.092 R)
• M30: 10,671,115 km (0.113 R)
• M31: 10,894,016 km (0.042 R)
• M32: 11,838,727 km (0.088 R)
• M33: 12,888,305 km (0.106 R)
• M34: 12,967,293 km (0.105 R)
• M35: 13,046,430 km (0.059 R)
• M36: 14,048,736 km (0.046 R)
• M37: 14,620,798 km (0.037 R)
• M38: 14,785,655 km (0.115 R)
• M39: 14,951,260 km (0.119 R)
• M40: 15,034,137 km (0.116 R)
• M41: 15,242,377 km (0.112 R)
• M42: 15,493,403 km (0.097 R)
• M43: 15,745,774 km (0.115 R)
• M44: 16,941,510 km (0.108 R)
• M45: 17,028,127 km (0.051 R)
• M46: 17,158,128 km (0.051 R)
• M47: 17,419,326 km (0.058 R)
• M48: 17,594,206 km (0.072 R)
• M49: 18,477,132 km (0.076 R)
• M50: 18,655,453 km (0.086 R)
• M51: 20,056,736 km (0.04 R)
• M52: 20,562,227 km (0.073 R)
• M53: 21,118,283 km (0.112 R)
• M54: 21,304,831 km (0.106 R)
• M55: 21,538,653 km (0.113 R)
• M56: 22,008,988 km (0.108 R)
• M57: 22,911,811 km (0.062 R)
• M58: 23,007,554 km (0.108 R)
• M59: 23,536,682 km (0.101 R)
• M60: 23,923,841 km (0.083 R)
• M61: 24,166,938 km (0.092 R)
• M62: 24,802,878 km (0.105 R)
• M63: 26,291,377 km (0.104 R)
• M64: 26,391,757 km (0.104 R)
• M65: 26,642,932 km (0.088 R)
• M66: 27,046,547 km (0.095 R)
• M67: 28,115,573 km (0.091 R)
• M68: 28,836,037 km (0.07 R)
• M69: 29,250,423 km (0.097 R)
• M70: 29,354,244 km (0.082 R)
• M71: 29,458,364 km (0.088 R)
• M72: 30,085,029 km (0.094 R)
• M73: 31,139,395 km (0.033 R)
• M74: 31,458,188 km (0.11 R)
• M75: 31,671,216 km (0.088 R)
• M76: 32,959,552 km (0.115 R)
• M77: 33,882,571 km (0.047 R)
• M78: 34,539,156 km (0.076 R)
• M79: 34,704,013 km (0.06 R)
• M80: 35,144,729 km (0.092 R)
• M81: 35,365,834 km (0.086 R)
• M82: 35,698,241 km (0.102 R)
• M83: 35,864,893 km (0.096 R)
• M84: 36,814,091 km (0.091 R)
• M85: 37,828,066 km (0.093 R)

Planet 7 - Gas Giant

Semi-Major Axis: 9.36 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 446.2

Radius: 11.3

Gravity: 3.49 G

Time & Orbit

Eccentricity (e): 0.139

Orbit Range: 8.06 AU - 10.66 AU

Year: 10256 Days

Day: 9.4 Hours

Environment

Temp: -171 °C

Axial Tilt: 17 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 90,132,119 km

• M1: 189,092 km (0.06 R)
• M2: 625,618 km (0.116 R)
• M3: 698,622 km (0.082 R)
• M4: 806,482 km (0.084 R)
• M5: 971,189 km (0.11 R)
• M6: 1,296,714 km (0.098 R)
• M7: 1,373,757 km (0.1 R)
• M8: 1,472,342 km (0.084 R)
• M9: 1,614,610 km (0.073 R)
• M10: 1,957,339 km (0.108 R)
• M11: 2,785,662 km (0.055 R)
• M12: 2,861,358 km (0.103 R)
• M13: 2,989,115 km (0.104 R)
• M14: 3,197,505 km (0.07 R)
• M15: 3,879,372 km (0.083 R)
• M16: 4,516,210 km (0.078 R)
• M17: 5,500,265 km (0.037 R)
• M18: 6,016,527 km (0.06 R)
• M19: 6,414,158 km (0.063 R)
• M20: 6,650,074 km (0.103 R)
• M21: 7,165,140 km (0.044 R)
• M22: 7,339,720 km (0.111 R)
• M23: 7,622,012 km (0.112 R)
• M24: 7,800,332 km (0.084 R)
• M25: 8,016,052 km (0.045 R)
• M26: 9,773,678 km (0.107 R)
• M27: 10,556,523 km (0.095 R)
• M28: 10,915,558 km (0.107 R)
• M29: 11,197,401 km (0.101 R)
• M30: 11,645,446 km (0.111 R)
• M31: 12,182,353 km (0.095 R)
• M32: 12,727,488 km (0.117 R)
• M33: 13,798,010 km (0.106 R)
• M34: 14,410,164 km (0.085 R)
• M35: 15,031,145 km (0.057 R)
• M36: 15,210,214 km (0.104 R)
• M37: 15,660,952 km (0.053 R)
• M38: 16,070,402 km (0.077 R)
• M39: 17,272,869 km (0.114 R)
• M40: 18,408,467 km (0.099 R)
• M41: 18,696,143 km (0.074 R)
• M42: 18,792,335 km (0.093 R)
• M43: 20,058,382 km (0.099 R)
• M44: 20,453,320 km (0.086 R)
• M45: 20,552,503 km (0.073 R)
• M46: 21,251,275 km (0.069 R)
• M47: 21,653,993 km (0.071 R)
• M48: 21,906,963 km (0.045 R)
• M49: 22,160,980 km (0.06 R)
• M50: 22,467,057 km (0.098 R)
• M51: 22,569,382 km (0.093 R)
• M52: 22,723,169 km (0.045 R)
• M53: 23,601,158 km (0.105 R)
• M54: 24,385,201 km (0.114 R)
• M55: 25,443,905 km (0.057 R)
• M56: 25,603,975 km (0.106 R)
• M57: 26,086,278 km (0.049 R)
• M58: 26,247,694 km (0.12 R)
• M59: 27,223,222 km (0.073 R)
• M60: 27,441,635 km (0.029 R)
• M61: 27,825,354 km (0.053 R)
• M62: 28,542,376 km (0.039 R)
• M63: 28,653,378 km (0.063 R)
• M64: 29,098,282 km (0.052 R)
• M65: 31,185,621 km (0.082 R)
• M66: 31,357,060 km (0.097 R)
• M67: 31,758,132 km (0.049 R)
• M68: 32,333,934 km (0.117 R)
• M69: 32,797,239 km (0.046 R)
• M70: 32,913,327 km (0.114 R)
• M71: 33,087,758 km (0.047 R)
• M72: 33,613,146 km (0.108 R)
• M73: 34,376,693 km (0.103 R)
• M74: 34,494,726 km (0.11 R)
• M75: 35,681,935 km (0.109 R)
• M76: 36,040,820 km (0.098 R)
• M77: 36,220,636 km (0.111 R)
• M78: 36,521,029 km (0.074 R)
• M79: 37,063,920 km (0.113 R)
• M80: 37,305,969 km (0.108 R)
• M81: 40,065,900 km (0.085 R)
• M82: 40,438,848 km (0.111 R)
• M83: 42,131,248 km (0.071 R)

Planet 8 - Ice Giant

Semi-Major Axis: 15.97 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 871.7

Radius: 3.3

Gravity: 80.05 G

Time & Orbit

Eccentricity (e): 0.077

Orbit Range: 14.74 AU - 17.2 AU

Year: 22858 Days

Day: 19.4 Hours

Environment

Temp: -184 °C

Axial Tilt: 34.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 90,132,119 km

• M1: 118,033 km (0.075 R)
• M2: 656,435 km (0.073 R)
• M3: 1,078,601 km (0.05 R)
• M4: 1,234,930 km (0.116 R)
• M5: 1,299,407 km (0.057 R)
• M6: 1,431,801 km (0.098 R)
• M7: 1,568,534 km (0.117 R)
• M8: 1,745,358 km (0.083 R)
• M9: 2,273,588 km (0.093 R)
• M10: 2,313,082 km (0.105 R)
• M11: 2,762,773 km (0.107 R)
• M12: 4,509,777 km (0.108 R)
• M13: 4,861,781 km (0.075 R)
• M14: 5,015,418 km (0.071 R)
• M15: 5,860,945 km (0.099 R)
• M16: 6,300,165 km (0.112 R)
• M17: 7,093,781 km (0.116 R)
• M18: 7,326,257 km (0.09 R)
• M19: 7,561,275 km (0.07 R)
• M20: 7,858,526 km (0.094 R)
• M21: 8,099,079 km (0.089 R)
• M22: 8,220,253 km (0.115 R)
• M23: 8,280,990 km (0.076 R)
• M24: 9,784,598 km (0.041 R)
• M25: 9,849,075 km (0.061 R)
• M26: 10,108,328 km (0.114 R)
• M27: 11,033,292 km (0.063 R)
• M28: 12,750,825 km (0.096 R)
• M29: 12,821,136 km (0.052 R)
• M30: 15,440,595 km (0.104 R)
• M31: 18,217,879 km (0.083 R)
• M32: 18,775,580 km (0.101 R)
• M33: 18,935,949 km (0.114 R)
• M34: 19,989,267 km (0.115 R)
• M35: 21,144,612 km (0.1 R)
• M36: 22,917,945 km (0.096 R)
• M37: 23,433,310 km (0.072 R)
• M38: 23,952,564 km (0.066 R)
• M39: 24,126,397 km (0.115 R)
• M40: 25,888,360 km (0.107 R)
• M41: 27,509,104 km (0.089 R)
• M42: 29,814,108 km (0.054 R)
• M43: 30,094,903 km (0.098 R)
• M44: 30,282,499 km (0.086 R)
• M45: 31,131,616 km (0.035 R)
• M46: 31,321,456 km (0.078 R)
• M47: 31,606,739 km (0.07 R)
• M48: 31,988,662 km (0.104 R)
• M49: 33,434,077 km (0.06 R)
• M50: 34,999,319 km (0.111 R)
• M51: 35,493,292 km (0.098 R)
• M52: 37,089,501 km (0.056 R)
• M53: 38,301,842 km (0.07 R)
• M54: 39,219,775 km (0.102 R)
• M55: 40,454,705 km (0.075 R)
• M56: 41,702,351 km (0.099 R)
• M57: 42,225,944 km (0.075 R)
• M58: 42,330,961 km (0.072 R)
• M59: 43,385,626 km (0.11 R)
• M60: 44,022,465 km (0.068 R)
• M61: 44,555,631 km (0.102 R)
• M62: 44,662,444 km (0.115 R)
• M63: 45,412,977 km (0.044 R)
• M64: 45,951,679 km (0.044 R)
• M65: 48,127,281 km (0.114 R)
• M66: 48,676,454 km (0.092 R)
• M67: 50,670,444 km (0.116 R)
• M68: 52,014,432 km (0.049 R)
• M69: 54,280,540 km (0.12 R)
• M70: 54,737,711 km (0.117 R)
• M71: 56,694,451 km (0.095 R)
• M72: 59,966,905 km (0.057 R)
• M73: 60,202,970 km (0.045 R)
• M74: 62,820,185 km (0.115 R)
• M75: 64,746,856 km (0.114 R)
• M76: 67,304,830 km (0.09 R)
• M77: 68,411,256 km (0.045 R)
• M78: 70,392,829 km (0.073 R)
• M79: 70,891,289 km (0.099 R)
• M80: 73,526,755 km (0.117 R)
• M81: 74,412,374 km (0.109 R)
• M82: 75,683,657 km (0.096 R)
• M83: 76,194,235 km (0.086 R)
• M84: 76,321,991 km (0.096 R)
• M85: 76,449,897 km (0.083 R)
• M86: 78,118,811 km (0.112 R)
• M87: 79,151,785 km (0.084 R)
• M88: 79,669,992 km (0.116 R)
• M89: 80,319,396 km (0.098 R)
• M90: 81,100,895 km (0.115 R)
• M91: 82,802,721 km (0.041 R)
• M92: 83,724,094 km (0.12 R)
• M93: 84,516,364 km (0.108 R)
• M94: 87,576,688 km (0.118 R)

Kuiper Belt

Range: 30.6 - 54.6 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 210 - 10,413 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit