🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 1.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 481.7

Radius: 10.9

Gravity: 4.05 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 0.83 AU - 1.19 AU

Year: 666 Days

Day: 7.9 Hours

Environment

Temp: -167 °C

Axial Tilt: 0.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (48)

Outer Limit: 28,259,564 km

• M1: 138,677 km (0.103 R)
• M2: 212,279 km (0.117 R)
• M3: 293,810 km (0.105 R)
• M4: 472,430 km (0.036 R)
• M5: 566,826 km (0.111 R)
• M6: 717,771 km (0.103 R)
• M7: 927,806 km (0.094 R)
• M8: 1,019,809 km (0.118 R)
• M9: 1,297,911 km (0.117 R)
• M10: 1,413,700 km (0.073 R)
• M11: 1,514,978 km (0.105 R)
• M12: 1,643,632 km (0.104 R)
• M13: 1,756,877 km (0.09 R)
• M14: 2,119,353 km (0.076 R)
• M15: 2,305,902 km (0.058 R)
• M16: 2,483,773 km (0.078 R)
• M17: 2,695,754 km (0.077 R)
• M18: 2,852,981 km (0.095 R)
• M19: 2,928,977 km (0.117 R)
• M20: 2,997,941 km (0.1 R)
• M21: 3,192,419 km (0.116 R)
• M22: 3,319,128 km (0.106 R)
• M23: 3,431,326 km (0.074 R)
• M24: 3,504,181 km (0.087 R)
• M25: 3,585,711 km (0.097 R)
• M26: 3,659,762 km (0.118 R)
• M27: 3,809,211 km (0.087 R)
• M28: 4,020,144 km (0.113 R)
• M29: 4,183,205 km (0.027 R)
• M30: 4,296,002 km (0.101 R)
• M31: 4,383,367 km (0.041 R)
• M32: 4,471,480 km (0.118 R)
• M33: 4,586,820 km (0.058 R)
• M34: 4,775,463 km (0.1 R)
• M35: 4,911,597 km (0.089 R)
• M36: 5,104,579 km (0.108 R)
• M37: 5,356,352 km (0.102 R)
• M38: 5,460,023 km (0.116 R)
• M39: 5,564,442 km (0.057 R)
• M40: 5,785,099 km (0.105 R)
• M41: 6,008,449 km (0.072 R)
• M42: 6,096,712 km (0.094 R)
• M43: 6,284,307 km (0.085 R)
• M44: 6,363,893 km (0.083 R)
• M45: 6,534,285 km (0.059 R)
• M46: 6,716,196 km (0.115 R)
• M47: 6,807,750 km (0.11 R)
• M48: 6,961,387 km (0.116 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 668.8

Radius: 10.9

Gravity: 5.63 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 0.85 AU - 1.17 AU

Year: 666 Days

Day: 5.5 Hours

Environment

Temp: -167 °C

Axial Tilt: 14.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (52)

Outer Limit: 28,259,564 km

• M1: 135,835 km (0.1 R)
• M2: 254,017 km (0.102 R)
• M3: 332,556 km (0.12 R)
• M4: 474,824 km (0.075 R)
• M5: 576,999 km (0.106 R)
• M6: 776,263 km (0.11 R)
• M7: 927,656 km (0.067 R)
• M8: 1,100,891 km (0.071 R)
• M9: 1,266,795 km (0.038 R)
• M10: 1,518,568 km (0.105 R)
• M11: 1,773,034 km (0.072 R)
• M12: 1,990,848 km (0.104 R)
• M13: 2,084,796 km (0.097 R)
• M14: 2,180,389 km (0.119 R)
• M15: 2,300,067 km (0.109 R)
• M16: 2,445,177 km (0.076 R)
• M17: 2,569,643 km (0.071 R)
• M18: 2,664,488 km (0.082 R)
• M19: 2,760,530 km (0.077 R)
• M20: 2,841,462 km (0.085 R)
• M21: 2,915,064 km (0.104 R)
• M22: 3,198,702 km (0.076 R)
• M23: 3,266,769 km (0.07 R)
• M24: 3,404,399 km (0.101 R)
• M25: 3,632,087 km (0.117 R)
• M26: 3,703,295 km (0.077 R)
• M27: 3,783,779 km (0.064 R)
• M28: 3,974,217 km (0.103 R)
• M29: 4,075,046 km (0.088 R)
• M30: 4,158,372 km (0.089 R)
• M31: 4,373,793 km (0.041 R)
• M32: 4,487,637 km (0.095 R)
• M33: 4,583,230 km (0.106 R)
• M34: 4,660,273 km (0.098 R)
• M35: 4,943,162 km (0.036 R)
• M36: 5,151,552 km (0.116 R)
• M37: 5,221,564 km (0.083 R)
• M38: 5,302,197 km (0.067 R)
• M39: 5,383,130 km (0.081 R)
• M40: 5,793,926 km (0.112 R)
• M41: 5,929,760 km (0.092 R)
• M42: 6,098,357 km (0.118 R)
• M43: 6,279,071 km (0.119 R)
• M44: 6,515,885 km (0.107 R)
• M45: 6,602,652 km (0.118 R)
• M46: 6,700,788 km (0.116 R)
• M47: 6,898,407 km (0.106 R)
• M48: 7,009,109 km (0.07 R)
• M49: 7,098,120 km (0.089 R)
• M50: 7,356,026 km (0.111 R)
• M51: 7,560,078 km (0.117 R)
• M52: 7,651,333 km (0.085 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.17 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 309

Radius: 9.6

Gravity: 3.35 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 1.12 AU - 1.22 AU

Year: 830 Days

Day: 14.4 Hours

Environment

Temp: -169 °C

Axial Tilt: 7.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 28,259,564 km

• M1: 122,521 km (0.043 R)
• M2: 191,635 km (0.054 R)
• M3: 257,757 km (0.037 R)
• M4: 346,768 km (0.078 R)
• M5: 426,952 km (0.099 R)
• M6: 506,987 km (0.092 R)
• M7: 571,913 km (0.114 R)
• M8: 679,922 km (0.085 R)
• M9: 766,988 km (0.097 R)
• M10: 877,840 km (0.097 R)
• M11: 958,474 km (0.114 R)
• M12: 1,031,029 km (0.075 R)
• M13: 1,105,678 km (0.073 R)
• M14: 1,317,808 km (0.06 R)
• M15: 1,387,670 km (0.03 R)
• M16: 1,482,664 km (0.113 R)
• M17: 1,768,546 km (0.053 R)
• M18: 1,852,470 km (0.072 R)
• M19: 1,944,473 km (0.095 R)
• M20: 2,017,926 km (0.071 R)
• M21: 2,092,276 km (0.105 R)
• M22: 2,535,983 km (0.1 R)
• M23: 2,720,288 km (0.11 R)
• M24: 2,840,564 km (0.11 R)
• M25: 2,993,453 km (0.112 R)
• M26: 3,141,106 km (0.109 R)
• M27: 3,427,886 km (0.078 R)
• M28: 3,517,196 km (0.095 R)
• M29: 3,681,604 km (0.055 R)
• M30: 3,756,403 km (0.082 R)
• M31: 3,856,932 km (0.085 R)
• M32: 3,949,833 km (0.116 R)
• M33: 4,095,092 km (0.114 R)
• M34: 4,207,291 km (0.112 R)
• M35: 4,443,655 km (0.098 R)
• M36: 4,514,565 km (0.119 R)
• M37: 4,576,947 km (0.106 R)
• M38: 4,693,484 km (0.115 R)
• M39: 4,783,841 km (0.091 R)
• M40: 4,938,675 km (0.07 R)
• M41: 5,049,078 km (0.088 R)
• M42: 5,234,878 km (0.119 R)
• M43: 5,489,344 km (0.046 R)
• M44: 5,834,915 km (0.063 R)
• M45: 6,108,530 km (0.101 R)
• M46: 6,326,494 km (0.117 R)
• M47: 6,516,932 km (0.107 R)
• M48: 6,597,715 km (0.095 R)
• M49: 6,658,452 km (0.12 R)
• M50: 6,954,805 km (0.078 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.46 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 138.4

Radius: 9

Gravity: 1.71 G

Time & Orbit

Eccentricity (e): 0.138

Orbit Range: 1.26 AU - 1.66 AU

Year: 1157 Days

Day: 14.1 Hours

Environment

Temp: -178 °C

Axial Tilt: 46 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 28,259,564 km

• M1: 126,410 km (0.075 R)
• M2: 203,603 km (0.114 R)
• M3: 286,330 km (0.062 R)
• M4: 344,973 km (0.065 R)
• M5: 419,772 km (0.071 R)
• M6: 560,094 km (0.106 R)
• M7: 647,310 km (0.036 R)
• M8: 703,708 km (0.108 R)
• M9: 771,177 km (0.097 R)
• M10: 864,825 km (0.083 R)
• M11: 957,576 km (0.061 R)
• M12: 1,043,595 km (0.077 R)
• M13: 1,137,542 km (0.082 R)
• M14: 1,357,002 km (0.07 R)
• M15: 1,489,396 km (0.071 R)
• M16: 1,548,338 km (0.108 R)
• M17: 1,632,113 km (0.108 R)
• M18: 1,773,333 km (0.099 R)
• M19: 2,009,249 km (0.113 R)
• M20: 2,114,267 km (0.082 R)
• M21: 2,454,901 km (0.032 R)
• M22: 2,546,305 km (0.06 R)
• M23: 2,610,184 km (0.099 R)
• M24: 2,667,480 km (0.092 R)
• M25: 2,747,066 km (0.116 R)
• M26: 3,042,970 km (0.104 R)
• M27: 3,126,147 km (0.091 R)
• M28: 3,240,888 km (0.062 R)
• M29: 3,372,534 km (0.082 R)
• M30: 3,561,626 km (0.074 R)
• M31: 3,681,454 km (0.108 R)
• M32: 3,770,315 km (0.053 R)
• M33: 3,949,982 km (0.091 R)
• M34: 4,157,774 km (0.111 R)
• M35: 4,326,520 km (0.107 R)
• M36: 4,506,337 km (0.054 R)
• M37: 4,644,864 km (0.117 R)
• M38: 4,837,696 km (0.045 R)
• M39: 4,988,640 km (0.081 R)
• M40: 5,060,148 km (0.075 R)
• M41: 5,122,979 km (0.033 R)
• M42: 5,267,790 km (0.043 R)
• M43: 5,441,323 km (0.097 R)
• M44: 5,533,476 km (0.102 R)
• M45: 5,644,776 km (0.086 R)
• M46: 5,775,525 km (0.053 R)
• M47: 5,850,773 km (0.025 R)
• M48: 5,935,744 km (0.109 R)
• M49: 6,337,714 km (0.104 R)
• M50: 6,551,788 km (0.093 R)
• M51: 6,620,454 km (0.099 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 813.7

Radius: 11.4

Gravity: 6.26 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 1.96 AU - 2.22 AU

Year: 1982 Days

Day: 13.4 Hours

Environment

Temp: -198 °C

Axial Tilt: 39.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 28,259,564 km

• M1: 146,157 km (0.103 R)
• M2: 217,665 km (0.073 R)
• M3: 387,010 km (0.111 R)
• M4: 565,929 km (0.042 R)
• M5: 757,713 km (0.091 R)
• M6: 981,362 km (0.116 R)
• M7: 1,166,115 km (0.091 R)
• M8: 1,373,308 km (0.107 R)
• M9: 1,492,688 km (0.1 R)
• M10: 1,570,478 km (0.087 R)
• M11: 1,800,710 km (0.089 R)
• M12: 1,932,057 km (0.101 R)
• M13: 2,017,477 km (0.065 R)
• M14: 2,154,209 km (0.064 R)
• M15: 2,397,755 km (0.066 R)
• M16: 2,610,034 km (0.117 R)
• M17: 2,884,097 km (0.114 R)
• M18: 3,010,657 km (0.118 R)
• M19: 3,625,205 km (0.103 R)
• M20: 3,916,023 km (0.083 R)
• M21: 4,135,334 km (0.113 R)
• M22: 4,246,485 km (0.077 R)
• M23: 4,701,113 km (0.073 R)
• M24: 4,883,922 km (0.067 R)
• M25: 5,291,277 km (0.096 R)
• M26: 5,833,719 km (0.11 R)
• M27: 6,302,409 km (0.11 R)
• M28: 6,467,415 km (0.114 R)
• M29: 6,578,267 km (0.11 R)
• M30: 6,764,517 km (0.077 R)
• M31: 6,933,562 km (0.06 R)
• M32: 7,199,398 km (0.115 R)
• M33: 7,275,992 km (0.094 R)
• M34: 7,468,674 km (0.067 R)
• M35: 7,721,644 km (0.079 R)
• M36: 8,296,100 km (0.117 R)
• M37: 8,396,629 km (0.08 R)
• M38: 8,497,458 km (0.092 R)
• M39: 8,639,427 km (0.079 R)
• M40: 9,152,697 km (0.055 R)
• M41: 9,256,518 km (0.066 R)
• M42: 9,549,430 km (0.113 R)
• M43: 9,824,092 km (0.117 R)
• M44: 9,973,092 km (0.064 R)
• M45: 10,080,054 km (0.109 R)
• M46: 10,165,774 km (0.114 R)
• M47: 10,251,792 km (0.104 R)
• M48: 10,381,344 km (0.118 R)
• M49: 10,576,719 km (0.105 R)
• M50: 10,773,141 km (0.108 R)
• M51: 11,169,875 km (0.04 R)
• M52: 11,347,746 km (0.094 R)
• M53: 11,571,545 km (0.098 R)
• M54: 11,909,786 km (0.109 R)
• M55: 12,000,442 km (0.082 R)
• M56: 12,665,405 km (0.049 R)
• M57: 12,758,006 km (0.093 R)
• M58: 13,013,968 km (0.049 R)
• M59: 13,271,725 km (0.111 R)
• M60: 13,483,705 km (0.065 R)
• M61: 13,863,534 km (0.077 R)
• M62: 14,536,724 km (0.055 R)
• M63: 15,097,716 km (0.077 R)
• M64: 15,368,488 km (0.052 R)
• M65: 15,665,739 km (0.113 R)
• M66: 16,015,050 km (0.108 R)
• M67: 16,645,007 km (0.079 R)
• M68: 17,129,255 km (0.065 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.35 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 624.9

Radius: 13

Gravity: 3.7 G

Time & Orbit

Eccentricity (e): 0.117

Orbit Range: 3.84 AU - 4.86 AU

Year: 5952 Days

Day: 8.1 Hours

Environment

Temp: -221 °C

Axial Tilt: 33.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 28,259,564 km

• M1: 173,234 km (0.085 R)
• M2: 366,814 km (0.12 R)
• M3: 666,907 km (0.057 R)
• M4: 930,200 km (0.105 R)
• M5: 1,030,729 km (0.053 R)
• M6: 1,275,322 km (0.074 R)
• M7: 1,405,023 km (0.12 R)
• M8: 1,556,416 km (0.055 R)
• M9: 2,158,996 km (0.037 R)
• M10: 2,256,534 km (0.12 R)
• M11: 2,640,402 km (0.084 R)
• M12: 2,724,028 km (0.096 R)
• M13: 3,001,831 km (0.088 R)
• M14: 3,334,088 km (0.06 R)
• M15: 3,470,371 km (0.096 R)
• M16: 3,631,638 km (0.043 R)
• M17: 4,959,319 km (0.079 R)
• M18: 5,326,283 km (0.054 R)
• M19: 5,486,203 km (0.062 R)
• M20: 5,920,785 km (0.117 R)
• M21: 6,823,308 km (0.099 R)
• M22: 6,910,075 km (0.073 R)
• M23: 7,114,127 km (0.108 R)
• M24: 7,320,123 km (0.112 R)
• M25: 8,817,448 km (0.081 R)
• M26: 9,326,530 km (0.09 R)
• M27: 9,682,124 km (0.072 R)
• M28: 10,174,301 km (0.084 R)
• M29: 10,306,844 km (0.098 R)
• M30: 11,942,847 km (0.034 R)
• M31: 12,223,343 km (0.115 R)
• M32: 12,364,414 km (0.082 R)
• M33: 13,149,952 km (0.099 R)
• M34: 13,658,286 km (0.079 R)
• M35: 14,284,353 km (0.114 R)
• M36: 15,146,186 km (0.049 R)
• M37: 15,986,328 km (0.109 R)
• M38: 16,450,979 km (0.086 R)
• M39: 16,645,905 km (0.113 R)
• M40: 16,998,656 km (0.086 R)
• M41: 17,116,839 km (0.109 R)
• M42: 17,393,595 km (0.033 R)
• M43: 17,951,595 km (0.113 R)
• M44: 18,637,052 km (0.11 R)
• M45: 18,799,665 km (0.117 R)
• M46: 19,290,047 km (0.118 R)
• M47: 20,367,152 km (0.115 R)
• M48: 20,618,476 km (0.059 R)
• M49: 21,293,761 km (0.058 R)
• M50: 22,796,322 km (0.088 R)
• M51: 22,883,089 km (0.107 R)
• M52: 23,013,688 km (0.076 R)
• M53: 23,538,327 km (0.069 R)
• M54: 24,067,006 km (0.088 R)
• M55: 24,465,984 km (0.101 R)
• M56: 24,599,425 km (0.041 R)
• M57: 25,091,004 km (0.113 R)
• M58: 25,225,642 km (0.077 R)
• M59: 25,360,579 km (0.063 R)
• M60: 25,766,588 km (0.111 R)
• M61: 26,220,318 km (0.105 R)
• M62: 26,997,778 km (0.081 R)
• M63: 27,089,631 km (0.114 R)
• M64: 27,273,936 km (0.044 R)
• M65: 27,597,366 km (0.111 R)
• M66: 27,782,718 km (0.066 R)
• M67: 27,875,469 km (0.104 R)
• M68: 28,015,044 km (0.105 R)
• M69: 28,387,991 km (0.093 R)
• M70: 28,856,681 km (0.08 R)
• M71: 29,044,726 km (0.089 R)
• M72: 29,138,972 km (0.09 R)
• M73: 29,375,038 km (0.102 R)
• M74: 29,659,124 km (0.083 R)
• M75: 30,229,990 km (0.063 R)
• M76: 30,804,595 km (0.057 R)
• M77: 31,334,471 km (0.104 R)
• M78: 31,867,338 km (0.105 R)
• M79: 32,110,585 km (0.117 R)
• M80: 32,256,742 km (0.081 R)
• M81: 32,354,279 km (0.094 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 310.2

Radius: 14.9

Gravity: 1.4 G

Time & Orbit

Eccentricity (e): 0.195

Orbit Range: 3.8 AU - 5.64 AU

Year: 6727 Days

Day: 13.8 Hours

Environment

Temp: -222 °C

Axial Tilt: 49.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 28,259,564 km

• M1: 205,398 km (0.099 R)
• M2: 385,065 km (0.085 R)
• M3: 597,943 km (0.094 R)
• M4: 750,383 km (0.12 R)
• M5: 905,666 km (0.104 R)
• M6: 1,086,380 km (0.113 R)
• M7: 1,195,586 km (0.083 R)
• M8: 1,703,471 km (0.114 R)
• M9: 1,849,030 km (0.115 R)
• M10: 1,998,927 km (0.053 R)
• M11: 2,187,869 km (0.098 R)
• M12: 2,383,094 km (0.08 R)
• M13: 2,677,503 km (0.108 R)
• M14: 2,867,791 km (0.092 R)
• M15: 3,181,648 km (0.085 R)
• M16: 3,506,724 km (0.069 R)
• M17: 3,715,712 km (0.112 R)
• M18: 3,907,197 km (0.072 R)
• M19: 4,411,940 km (0.063 R)
• M20: 4,569,617 km (0.11 R)
• M21: 5,007,490 km (0.043 R)
• M22: 5,125,073 km (0.059 R)
• M23: 5,849,576 km (0.057 R)
• M24: 6,376,160 km (0.082 R)
• M25: 6,632,272 km (0.113 R)
• M26: 7,022,872 km (0.074 R)
• M27: 7,582,518 km (0.085 R)
• M28: 7,826,811 km (0.089 R)
• M29: 8,128,999 km (0.119 R)
• M30: 8,295,501 km (0.106 R)
• M31: 8,688,345 km (0.041 R)
• M32: 9,202,363 km (0.093 R)
• M33: 9,318,003 km (0.117 R)
• M34: 9,492,284 km (0.12 R)
• M35: 9,609,120 km (0.052 R)
• M36: 10,021,861 km (0.105 R)
• M37: 10,440,435 km (0.059 R)
• M38: 10,712,554 km (0.073 R)
• M39: 11,263,822 km (0.109 R)
• M40: 11,605,354 km (0.055 R)
• M41: 11,855,781 km (0.115 R)
• M42: 12,266,726 km (0.093 R)
• M43: 12,394,184 km (0.113 R)
• M44: 12,682,459 km (0.053 R)
• M45: 13,200,367 km (0.077 R)
• M46: 13,990,393 km (0.113 R)
• M47: 14,257,126 km (0.119 R)
• M48: 14,795,828 km (0.106 R)
• M49: 15,409,777 km (0.096 R)
• M50: 16,136,524 km (0.1 R)
• M51: 16,346,260 km (0.109 R)
• M52: 16,733,120 km (0.067 R)
• M53: 16,909,945 km (0.102 R)
• M54: 17,301,293 km (0.085 R)
• M55: 17,984,207 km (0.111 R)
• M56: 18,129,018 km (0.054 R)
• M57: 18,492,990 km (0.106 R)
• M58: 19,302,314 km (0.062 R)
• M59: 20,386,749 km (0.045 R)
• M60: 20,575,691 km (0.119 R)
• M61: 20,803,229 km (0.092 R)
• M62: 21,414,038 km (0.081 R)
• M63: 22,341,544 km (0.1 R)
• M64: 22,653,606 km (0.098 R)
• M65: 23,006,357 km (0.116 R)
• M66: 23,321,410 km (0.117 R)
• M67: 23,479,535 km (0.099 R)
• M68: 24,797,493 km (0.114 R)
• M69: 25,485,942 km (0.068 R)
• M70: 25,648,854 km (0.038 R)
• M71: 26,098,545 km (0.061 R)
• M72: 26,592,069 km (0.093 R)
• M73: 27,254,937 km (0.104 R)
• M74: 27,421,589 km (0.045 R)
• M75: 27,881,453 km (0.087 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 344 - 20,188 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit