🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.76 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.6

Radius: 1.47

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.199

Orbit Range: 0.61 AU - 0.91 AU

Year: 238 Days

Day: 15.8 Hours

Environment

Temp: 166 °C

Axial Tilt: 14.6 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 0.81 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.3

Radius: 0.62

Gravity: 0.78 G

Time & Orbit

Eccentricity (e): 0.108

Orbit Range: 0.72 AU - 0.9 AU

Year: 262 Days

Day: 23.2 Hours

Environment

Temp: 165 °C

Axial Tilt: 22.7 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 3 - Terrestrial

Semi-Major Axis: 2.3 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.95

Radius: 1.54

Gravity: 1.24 G

Time & Orbit

Eccentricity (e): 0.241

Orbit Range: 1.75 AU - 2.85 AU

Year: 1255 Days

Day: 38.1 Hours

Environment

Temp: -76 °C

Axial Tilt: 9.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 5.7 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 623.8

Radius: 14.8

Gravity: 2.85 G

Time & Orbit

Eccentricity (e): 0.186

Orbit Range: 4.64 AU - 6.76 AU

Year: 4898 Days

Day: 5.4 Hours

Environment

Temp: -137 °C

Axial Tilt: 38.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 91,405,616 km

• M1: 186,549 km (0.057 R)
• M2: 325,675 km (0.075 R)
• M3: 715,227 km (0.093 R)
• M4: 1,050,626 km (0.091 R)
• M5: 1,173,894 km (0.095 R)
• M6: 1,575,266 km (0.082 R)
• M7: 1,751,492 km (0.084 R)
• M8: 1,934,450 km (0.033 R)
• M9: 2,356,316 km (0.095 R)
• M10: 2,484,970 km (0.074 R)
• M11: 2,635,017 km (0.069 R)
• M12: 2,768,907 km (0.119 R)
• M13: 2,983,879 km (0.094 R)
• M14: 3,368,645 km (0.091 R)
• M15: 3,877,577 km (0.12 R)
• M16: 4,119,177 km (0.104 R)
• M17: 4,320,536 km (0.119 R)
• M18: 4,663,564 km (0.12 R)
• M19: 4,779,802 km (0.112 R)
• M20: 5,110,862 km (0.088 R)
• M21: 5,327,629 km (0.104 R)
• M22: 5,920,785 km (0.104 R)
• M23: 6,047,045 km (0.109 R)
• M24: 6,639,602 km (0.1 R)
• M25: 6,770,949 km (0.072 R)
• M26: 7,631,735 km (0.07 R)
• M27: 7,741,839 km (0.109 R)
• M28: 7,935,718 km (0.115 R)
• M29: 8,103,268 km (0.07 R)
• M30: 8,271,865 km (0.091 R)
• M31: 8,584,225 km (0.082 R)
• M32: 8,698,817 km (0.084 R)
• M33: 8,813,858 km (0.029 R)
• M34: 9,103,778 km (0.077 R)
• M35: 9,249,936 km (0.079 R)
• M36: 9,396,841 km (0.113 R)
• M37: 9,574,114 km (0.086 R)
• M38: 10,203,772 km (0.117 R)
• M39: 10,447,018 km (0.097 R)
• M40: 10,569,538 km (0.109 R)
• M41: 10,908,677 km (0.081 R)
• M42: 11,063,959 km (0.039 R)
• M43: 11,979,648 km (0.1 R)
• M44: 13,514,821 km (0.042 R)
• M45: 13,950,450 km (0.077 R)
• M46: 14,458,784 km (0.047 R)
• M47: 14,629,625 km (0.09 R)
• M48: 15,284,863 km (0.12 R)
• M49: 15,809,054 km (0.113 R)
• M50: 16,410,138 km (0.077 R)
• M51: 16,624,063 km (0.106 R)
• M52: 16,803,132 km (0.062 R)
• M53: 17,271,673 km (0.099 R)
• M54: 17,525,690 km (0.088 R)
• M55: 17,927,360 km (0.09 R)
• M56: 18,221,469 km (0.029 R)
• M57: 19,338,517 km (0.118 R)
• M58: 19,602,407 km (0.067 R)
• M59: 20,286,369 km (0.104 R)
• M60: 20,746,682 km (0.084 R)
• M61: 20,862,321 km (0.095 R)
• M62: 21,094,197 km (0.056 R)
• M63: 21,249,330 km (0.083 R)
• M64: 21,638,734 km (0.037 R)
• M65: 21,951,842 km (0.106 R)
• M66: 22,622,489 km (0.075 R)
• M67: 23,620,756 km (0.103 R)
• M68: 25,001,544 km (0.118 R)
• M69: 25,536,506 km (0.031 R)
• M70: 26,617,500 km (0.1 R)
• M71: 26,743,312 km (0.098 R)
• M72: 27,417,101 km (0.101 R)
• M73: 28,011,154 km (0.064 R)
• M74: 28,438,256 km (0.082 R)

Planet 5 - Gas Giant

Semi-Major Axis: 7.64 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 600.1

Radius: 13.4

Gravity: 3.34 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 7.38 AU - 7.9 AU

Year: 7600 Days

Day: 5.2 Hours

Environment

Temp: -157 °C

Axial Tilt: 23.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (80)

Outer Limit: 91,405,616 km

• M1: 184,305 km (0.073 R)
• M2: 299,345 km (0.108 R)
• M3: 459,565 km (0.092 R)
• M4: 591,809 km (0.089 R)
• M5: 725,550 km (0.086 R)
• M6: 963,410 km (0.093 R)
• M7: 1,109,119 km (0.113 R)
• M8: 1,497,624 km (0.084 R)
• M9: 1,727,706 km (0.098 R)
• M10: 1,908,121 km (0.117 R)
• M11: 2,074,025 km (0.038 R)
• M12: 2,509,803 km (0.075 R)
• M13: 2,762,025 km (0.065 R)
• M14: 3,022,625 km (0.075 R)
• M15: 3,542,627 km (0.113 R)
• M16: 3,931,432 km (0.116 R)
• M17: 4,582,183 km (0.114 R)
• M18: 5,413,349 km (0.12 R)
• M19: 6,136,505 km (0.083 R)
• M20: 6,384,239 km (0.103 R)
• M21: 6,667,128 km (0.107 R)
• M22: 6,922,043 km (0.083 R)
• M23: 7,050,697 km (0.119 R)
• M24: 7,739,296 km (0.081 R)
• M25: 8,760,302 km (0.118 R)
• M26: 9,074,906 km (0.096 R)
• M27: 9,180,672 km (0.075 R)
• M28: 10,077,511 km (0.032 R)
• M29: 10,703,279 km (0.098 R)
• M30: 10,852,428 km (0.12 R)
• M31: 12,186,392 km (0.084 R)
• M32: 12,537,798 km (0.098 R)
• M33: 12,853,000 km (0.116 R)
• M34: 13,250,631 km (0.093 R)
• M35: 13,531,427 km (0.094 R)
• M36: 14,303,651 km (0.096 R)
• M37: 14,633,065 km (0.102 R)
• M38: 14,923,285 km (0.054 R)
• M39: 15,805,613 km (0.103 R)
• M40: 15,975,557 km (0.094 R)
• M41: 16,060,827 km (0.101 R)
• M42: 17,752,779 km (0.093 R)
• M43: 17,929,604 km (0.118 R)
• M44: 18,106,877 km (0.104 R)
• M45: 19,092,727 km (0.047 R)
• M46: 19,273,741 km (0.095 R)
• M47: 19,774,744 km (0.096 R)
• M48: 20,976,015 km (0.052 R)
• M49: 21,774,269 km (0.052 R)
• M50: 23,158,798 km (0.082 R)
• M51: 23,351,928 km (0.035 R)
• M52: 23,691,366 km (0.078 R)
• M53: 24,032,449 km (0.101 R)
• M54: 25,263,789 km (0.119 R)
• M55: 25,762,100 km (0.105 R)
• M56: 25,962,262 km (0.111 R)
• M57: 26,112,757 km (0.062 R)
• M58: 26,313,966 km (0.072 R)
• M59: 26,667,167 km (0.089 R)
• M60: 27,890,129 km (0.078 R)
• M61: 28,405,045 km (0.026 R)
• M62: 29,079,283 km (0.105 R)
• M63: 29,601,529 km (0.072 R)
• M64: 30,179,426 km (0.1 R)
• M65: 30,814,319 km (0.117 R)
• M66: 31,186,668 km (0.094 R)
• M67: 31,828,443 km (0.077 R)
• M68: 32,043,266 km (0.06 R)
• M69: 32,150,976 km (0.077 R)
• M70: 32,258,686 km (0.064 R)
• M71: 32,474,556 km (0.117 R)
• M72: 33,016,250 km (0.073 R)
• M73: 34,493,978 km (0.066 R)
• M74: 34,769,986 km (0.086 R)
• M75: 35,769,748 km (0.068 R)
• M76: 36,441,443 km (0.066 R)
• M77: 37,343,668 km (0.077 R)
• M78: 37,513,611 km (0.072 R)
• M79: 37,968,089 km (0.106 R)
• M80: 38,196,076 km (0.091 R)

Planet 6 - Gas Giant

Semi-Major Axis: 9.36 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 712.2

Radius: 14.2

Gravity: 3.53 G

Time & Orbit

Eccentricity (e): 0.215

Orbit Range: 7.35 AU - 11.37 AU

Year: 10306 Days

Day: 11.8 Hours

Environment

Temp: -163 °C

Axial Tilt: 26.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 91,405,616 km

• M1: 249,828 km (0.072 R)
• M2: 994,676 km (0.086 R)
• M3: 1,357,152 km (0.109 R)
• M4: 1,644,978 km (0.049 R)
• M5: 1,737,729 km (0.098 R)
• M6: 2,874,224 km (0.058 R)
• M7: 3,636,874 km (0.09 R)
• M8: 3,759,694 km (0.119 R)
• M9: 5,340,494 km (0.11 R)
• M10: 7,102,757 km (0.066 R)
• M11: 7,608,847 km (0.091 R)
• M12: 7,727,328 km (0.118 R)
• M13: 9,963,817 km (0.08 R)
• M14: 11,107,791 km (0.08 R)
• M15: 11,197,401 km (0.05 R)
• M16: 11,332,487 km (0.055 R)
• M17: 11,649,635 km (0.115 R)
• M18: 11,969,924 km (0.106 R)
• M19: 12,200,305 km (0.114 R)
• M20: 12,292,906 km (0.055 R)
• M21: 12,432,331 km (0.095 R)
• M22: 12,665,704 km (0.091 R)
• M23: 13,374,798 km (0.09 R)
• M24: 13,518,262 km (0.097 R)
• M25: 13,951,348 km (0.107 R)
• M26: 14,096,757 km (0.094 R)
• M27: 14,487,058 km (0.092 R)
• M28: 15,079,166 km (0.061 R)
• M29: 15,478,293 km (0.105 R)
• M30: 15,628,938 km (0.068 R)
• M31: 15,881,011 km (0.08 R)
• M32: 16,032,853 km (0.034 R)
• M33: 16,954,525 km (0.089 R)
• M34: 17,057,897 km (0.067 R)
• M35: 17,893,252 km (0.098 R)
• M36: 17,998,569 km (0.063 R)
• M37: 18,209,950 km (0.087 R)
• M38: 18,688,364 km (0.085 R)
• M39: 19,766,516 km (0.101 R)
• M40: 20,203,492 km (0.046 R)
• M41: 20,920,365 km (0.107 R)
• M42: 21,983,108 km (0.096 R)
• M43: 22,095,905 km (0.109 R)
• M44: 22,209,001 km (0.082 R)
• M45: 22,379,093 km (0.058 R)
• M46: 22,606,333 km (0.086 R)
• M47: 23,006,058 km (0.072 R)
• M48: 23,696,602 km (0.037 R)
• M49: 25,098,334 km (0.105 R)
• M50: 25,334,549 km (0.111 R)
• M51: 26,767,397 km (0.048 R)
• M52: 27,432,809 km (0.045 R)
• M53: 27,859,163 km (0.108 R)
• M54: 28,165,090 km (0.074 R)
• M55: 28,656,819 km (0.095 R)
• M56: 29,089,456 km (0.032 R)
• M57: 29,711,184 km (0.102 R)
• M58: 30,023,694 km (0.072 R)
• M59: 30,463,063 km (0.112 R)
• M60: 30,778,266 km (0.076 R)
• M61: 31,221,225 km (0.083 R)
• M62: 31,348,234 km (0.11 R)
• M63: 31,794,035 km (0.071 R)
• M64: 32,370,286 km (0.036 R)
• M65: 33,793,261 km (0.105 R)
• M66: 34,315,807 km (0.106 R)
• M67: 34,775,222 km (0.066 R)
• M68: 34,972,691 km (0.067 R)
• M69: 35,435,098 km (0.118 R)
• M70: 35,633,914 km (0.093 R)
• M71: 36,299,026 km (0.071 R)
• M72: 36,834,137 km (0.104 R)
• M73: 37,574,348 km (0.072 R)
• M74: 38,659,531 km (0.037 R)
• M75: 39,892,815 km (0.05 R)
• M76: 40,306,753 km (0.081 R)
• M77: 41,626,954 km (0.052 R)
• M78: 42,116,887 km (0.037 R)
• M79: 44,024,709 km (0.086 R)
• M80: 44,523,917 km (0.12 R)
• M81: 45,240,341 km (0.034 R)
• M82: 46,467,043 km (0.104 R)
• M83: 47,193,790 km (0.115 R)
• M84: 47,485,506 km (0.115 R)
• M85: 47,704,667 km (0.079 R)
• M86: 48,290,791 km (0.09 R)

Planet 7 - Gas Giant

Semi-Major Axis: 9.57 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 471.2

Radius: 14.6

Gravity: 2.21 G

Time & Orbit

Eccentricity (e): 0.171

Orbit Range: 7.93 AU - 11.21 AU

Year: 10655 Days

Day: 11.9 Hours

Environment

Temp: -168 °C

Axial Tilt: 35.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (74)

Outer Limit: 91,405,616 km

• M1: 182,958 km (0.1 R)
• M2: 279,000 km (0.108 R)
• M3: 520,152 km (0.1 R)
• M4: 629,508 km (0.073 R)
• M5: 811,568 km (0.111 R)
• M6: 1,048,531 km (0.044 R)
• M7: 1,232,686 km (0.083 R)
• M8: 1,448,407 km (0.096 R)
• M9: 1,592,619 km (0.118 R)
• M10: 1,741,768 km (0.092 R)
• M11: 2,265,809 km (0.072 R)
• M12: 2,459,688 km (0.074 R)
• M13: 2,684,384 km (0.106 R)
• M14: 3,127,792 km (0.094 R)
• M15: 3,317,333 km (0.102 R)
• M16: 3,427,287 km (0.059 R)
• M17: 3,995,909 km (0.063 R)
• M18: 4,533,264 km (0.095 R)
• M19: 5,285,592 km (0.078 R)
• M20: 5,610,519 km (0.092 R)
• M21: 5,808,736 km (0.067 R)
• M22: 6,451,857 km (0.088 R)
• M23: 6,659,648 km (0.093 R)
• M24: 6,764,367 km (0.032 R)
• M25: 6,940,294 km (0.096 R)
• M26: 7,117,717 km (0.052 R)
• M27: 7,440,848 km (0.12 R)
• M28: 7,953,072 km (0.113 R)
• M29: 8,101,622 km (0.065 R)
• M30: 8,213,521 km (0.069 R)
• M31: 8,781,395 km (0.081 R)
• M32: 10,034,876 km (0.117 R)
• M33: 11,053,039 km (0.114 R)
• M34: 11,302,269 km (0.082 R)
• M35: 11,553,444 km (0.116 R)
• M36: 12,061,328 km (0.114 R)
• M37: 13,495,523 km (0.106 R)
• M38: 14,436,195 km (0.119 R)
• M39: 14,937,347 km (0.106 R)
• M40: 16,097,628 km (0.11 R)
• M41: 16,807,770 km (0.054 R)
• M42: 17,286,932 km (0.033 R)
• M43: 18,062,896 km (0.067 R)
• M44: 19,098,562 km (0.102 R)
• M45: 19,298,125 km (0.087 R)
• M46: 19,699,197 km (0.074 R)
• M47: 20,458,556 km (0.045 R)
• M48: 20,816,245 km (0.03 R)
• M49: 22,058,206 km (0.079 R)
• M50: 22,425,020 km (0.057 R)
• M51: 22,530,187 km (0.088 R)
• M52: 23,590,986 km (0.103 R)
• M53: 23,751,504 km (0.062 R)
• M54: 24,451,174 km (0.119 R)
• M55: 26,702,472 km (0.082 R)
• M56: 27,037,422 km (0.106 R)
• M57: 27,373,867 km (0.044 R)
• M58: 27,937,702 km (0.108 R)
• M59: 28,334,585 km (0.103 R)
• M60: 29,998,861 km (0.105 R)
• M61: 30,463,512 km (0.067 R)
• M62: 30,989,049 km (0.102 R)
• M63: 32,524,372 km (0.094 R)
• M64: 33,181,406 km (0.064 R)
• M65: 33,903,066 km (0.12 R)
• M66: 34,508,489 km (0.114 R)
• M67: 34,690,849 km (0.08 R)
• M68: 35,791,440 km (0.055 R)
• M69: 35,914,559 km (0.07 R)
• M70: 38,341,186 km (0.045 R)
• M71: 39,098,451 km (0.091 R)
• M72: 39,733,194 km (0.11 R)
• M73: 41,141,958 km (0.073 R)
• M74: 43,416,593 km (0.038 R)

Planet 8 - Ice Giant

Semi-Major Axis: 19.78 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 473.9

Radius: 5.9

Gravity: 13.61 G

Time & Orbit

Eccentricity (e): 0.246

Orbit Range: 14.91 AU - 24.65 AU

Year: 31660 Days

Day: 22.9 Hours

Environment

Temp: -197 °C

Axial Tilt: 48.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (98)

Outer Limit: 91,405,616 km

• M1: 138,677 km (0.093 R)
• M2: 208,689 km (0.071 R)
• M3: 275,858 km (0.068 R)
• M4: 412,890 km (0.105 R)
• M5: 916,287 km (0.12 R)
• M6: 1,094,458 km (0.098 R)
• M7: 1,415,645 km (0.066 R)
• M8: 1,552,078 km (0.098 R)
• M9: 1,837,810 km (0.053 R)
• M10: 3,496,701 km (0.08 R)
• M11: 4,704,703 km (0.092 R)
• M12: 4,755,567 km (0.104 R)
• M13: 5,273,475 km (0.076 R)
• M14: 6,588,440 km (0.106 R)
• M15: 6,702,433 km (0.075 R)
• M16: 7,106,348 km (0.12 R)
• M17: 7,817,237 km (0.073 R)
• M18: 8,426,848 km (0.116 R)
• M19: 10,147,672 km (0.09 R)
• M20: 10,744,717 km (0.109 R)
• M21: 12,391,940 km (0.1 R)
• M22: 12,532,711 km (0.118 R)
• M23: 12,744,841 km (0.096 R)
• M24: 13,101,034 km (0.071 R)
• M25: 13,677,883 km (0.116 R)
• M26: 15,381,952 km (0.082 R)
• M27: 16,528,770 km (0.098 R)
• M28: 17,782,250 km (0.096 R)
• M29: 17,861,687 km (0.082 R)
• M30: 19,065,949 km (0.114 R)
• M31: 19,309,944 km (0.078 R)
• M32: 21,130,849 km (0.052 R)
• M33: 21,298,997 km (0.107 R)
• M34: 22,317,758 km (0.076 R)
• M35: 22,833,123 km (0.091 R)
• M36: 23,700,641 km (0.103 R)
• M37: 24,226,328 km (0.104 R)
• M38: 26,457,730 km (0.109 R)
• M39: 26,548,386 km (0.049 R)
• M40: 27,094,269 km (0.042 R)
• M41: 27,919,899 km (0.117 R)
• M42: 28,382,157 km (0.083 R)
• M43: 29,690,091 km (0.111 R)
• M44: 31,113,066 km (0.04 R)
• M45: 31,208,659 km (0.088 R)
• M46: 31,784,760 km (0.101 R)
• M47: 31,881,101 km (0.055 R)
• M48: 34,123,574 km (0.027 R)
• M49: 35,513,188 km (0.071 R)
• M50: 36,921,353 km (0.062 R)
• M51: 37,938,170 km (0.111 R)
• M52: 38,861,338 km (0.063 R)
• M53: 39,791,837 km (0.089 R)
• M54: 41,464,042 km (0.078 R)
• M55: 42,839,445 km (0.1 R)
• M56: 43,052,472 km (0.075 R)
• M57: 43,265,799 km (0.105 R)
• M58: 45,309,455 km (0.105 R)
• M59: 46,945,158 km (0.085 R)
• M60: 48,046,199 km (0.119 R)
• M61: 48,378,156 km (0.109 R)
• M62: 48,822,013 km (0.117 R)
• M63: 50,836,049 km (0.098 R)
• M64: 51,739,770 km (0.079 R)
• M65: 59,395,441 km (0.045 R)
• M66: 59,514,072 km (0.088 R)
• M67: 61,183,884 km (0.038 R)
• M68: 61,303,861 km (0.107 R)
• M69: 62,024,624 km (0.105 R)
• M70: 62,627,503 km (0.114 R)
• M71: 63,717,473 km (0.105 R)
• M72: 65,180,540 km (0.109 R)
• M73: 65,547,953 km (0.051 R)
• M74: 65,670,623 km (0.06 R)
• M75: 68,015,420 km (0.085 R)
• M76: 68,886,229 km (0.076 R)
• M77: 69,135,758 km (0.038 R)
• M78: 70,136,568 km (0.11 R)
• M79: 70,638,918 km (0.073 R)
• M80: 70,890,392 km (0.081 R)
• M81: 75,597,938 km (0.047 R)
• M82: 76,112,853 km (0.075 R)
• M83: 77,146,276 km (0.112 R)
• M84: 78,184,186 km (0.092 R)
• M85: 80,405,265 km (0.051 R)
• M86: 80,536,612 km (0.073 R)
• M87: 82,779,533 km (0.04 R)
• M88: 83,044,770 km (0.098 R)
• M89: 83,443,149 km (0.103 R)
• M90: 83,842,127 km (0.1 R)
• M91: 84,909,208 km (0.072 R)
• M92: 86,115,117 km (0.069 R)
• M93: 86,922,197 km (0.099 R)
• M94: 87,056,985 km (0.118 R)
• M95: 87,731,671 km (0.075 R)
• M96: 88,002,144 km (0.076 R)
• M97: 88,543,838 km (0.085 R)
• M98: 90,584,802 km (0.081 R)

Kuiper Belt

Range: 30.5 - 45.5 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 475 - 19,169 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit