🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.61 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.79

Radius: 1.26

Gravity: 1.13 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 0.59 AU - 0.63 AU

Year: 313 Days

Day: 25.9 Hours

Environment

Temp: -131 °C

Axial Tilt: 8.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 17.7

Radius: 10.7

Gravity: 0.15 G

Time & Orbit

Eccentricity (e): 0.172

Orbit Range: 0.71 AU - 1.01 AU

Year: 523 Days

Day: 5.9 Hours

Environment

Temp: -157 °C

Axial Tilt: 18.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 67,763,488 km

• M1: 133,890 km (0.117 R)
• M2: 257,009 km (0.086 R)
• M3: 361,428 km (0.072 R)
• M4: 464,651 km (0.1 R)
• M5: 532,568 km (0.101 R)
• M6: 609,611 km (0.106 R)
• M7: 678,277 km (0.103 R)
• M8: 824,434 km (0.107 R)
• M9: 895,642 km (0.105 R)
• M10: 1,031,477 km (0.055 R)
• M11: 1,104,331 km (0.114 R)
• M12: 1,220,719 km (0.118 R)
• M13: 1,303,147 km (0.109 R)
• M14: 1,424,172 km (0.099 R)
• M15: 1,521,261 km (0.094 R)
• M16: 1,605,335 km (0.071 R)
• M17: 1,935,348 km (0.11 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 368.3

Radius: 9.7

Gravity: 3.91 G

Time & Orbit

Eccentricity (e): 0.248

Orbit Range: 0.77 AU - 1.27 AU

Year: 676 Days

Day: 12 Hours

Environment

Temp: -157 °C

Axial Tilt: 32.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (49)

Outer Limit: 67,763,488 km

• M1: 127,009 km (0.099 R)
• M2: 223,350 km (0.08 R)
• M3: 309,368 km (0.102 R)
• M4: 449,542 km (0.11 R)
• M5: 557,551 km (0.052 R)
• M6: 683,961 km (0.108 R)
• M7: 793,467 km (0.088 R)
• M8: 885,470 km (0.116 R)
• M9: 947,403 km (0.082 R)
• M10: 1,025,793 km (0.085 R)
• M11: 1,242,560 km (0.101 R)
• M12: 1,345,633 km (0.081 R)
• M13: 1,417,739 km (0.059 R)
• M14: 1,485,656 km (0.077 R)
• M15: 1,560,455 km (0.098 R)
• M16: 1,786,647 km (0.093 R)
• M17: 1,878,949 km (0.061 R)
• M18: 1,960,181 km (0.104 R)
• M19: 2,132,817 km (0.09 R)
• M20: 2,264,014 km (0.105 R)
• M21: 2,357,513 km (0.078 R)
• M22: 2,507,111 km (0.092 R)
• M23: 2,589,988 km (0.112 R)
• M24: 2,716,099 km (0.115 R)
• M25: 3,003,925 km (0.102 R)
• M26: 3,070,048 km (0.092 R)
• M27: 3,136,619 km (0.102 R)
• M28: 3,203,638 km (0.053 R)
• M29: 3,309,105 km (0.049 R)
• M30: 3,400,210 km (0.092 R)
• M31: 3,476,954 km (0.07 R)
• M32: 3,608,749 km (0.114 R)
• M33: 3,765,827 km (0.104 R)
• M34: 3,837,185 km (0.051 R)
• M35: 3,989,626 km (0.097 R)
• M36: 4,176,623 km (0.03 R)
• M37: 4,267,279 km (0.118 R)
• M38: 4,704,105 km (0.043 R)
• M39: 4,884,670 km (0.099 R)
• M40: 5,172,945 km (0.111 R)
• M41: 5,261,357 km (0.055 R)
• M42: 5,547,987 km (0.096 R)
• M43: 5,793,776 km (0.116 R)
• M44: 5,885,629 km (0.088 R)
• M45: 6,005,906 km (0.073 R)
• M46: 6,155,055 km (0.056 R)
• M47: 6,267,702 km (0.12 R)
• M48: 6,343,249 km (0.06 R)
• M49: 6,419,095 km (0.059 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.29 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 573.8

Radius: 10.2

Gravity: 5.52 G

Time & Orbit

Eccentricity (e): 0.04

Orbit Range: 3.16 AU - 3.42 AU

Year: 3915 Days

Day: 9.6 Hours

Environment

Temp: -206 °C

Axial Tilt: 22.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 67,763,488 km

• M1: 305,030 km (0.092 R)
• M2: 445,652 km (0.116 R)
• M3: 640,728 km (0.057 R)
• M4: 1,189,901 km (0.095 R)
• M5: 1,280,408 km (0.067 R)
• M6: 1,842,597 km (0.104 R)
• M7: 1,994,439 km (0.079 R)
• M8: 2,150,469 km (0.094 R)
• M9: 2,246,062 km (0.044 R)
• M10: 2,779,977 km (0.045 R)
• M11: 3,260,635 km (0.109 R)
• M12: 3,426,689 km (0.075 R)
• M13: 3,539,037 km (0.037 R)
• M14: 3,709,728 km (0.098 R)
• M15: 4,645,313 km (0.119 R)
• M16: 5,043,543 km (0.073 R)
• M17: 5,236,075 km (0.088 R)
• M18: 5,562,348 km (0.088 R)
• M19: 5,628,321 km (0.105 R)
• M20: 5,783,603 km (0.026 R)
• M21: 6,007,701 km (0.066 R)
• M22: 6,166,275 km (0.056 R)
• M23: 6,326,344 km (0.062 R)
• M24: 6,557,323 km (0.103 R)
• M25: 7,027,809 km (0.053 R)
• M26: 7,218,995 km (0.066 R)
• M27: 7,460,595 km (0.079 R)
• M28: 7,582,218 km (0.062 R)
• M29: 7,803,175 km (0.064 R)
• M30: 7,951,576 km (0.109 R)
• M31: 8,125,857 km (0.092 R)
• M32: 8,226,088 km (0.096 R)
• M33: 8,377,182 km (0.089 R)
• M34: 8,529,173 km (0.035 R)
• M35: 8,605,468 km (0.118 R)
• M36: 8,861,579 km (0.107 R)
• M37: 9,146,264 km (0.071 R)
• M38: 9,250,534 km (0.113 R)
• M39: 9,618,694 km (0.117 R)
• M40: 10,342,000 km (0.073 R)
• M41: 10,889,229 km (0.064 R)
• M42: 11,027,457 km (0.062 R)
• M43: 11,558,231 km (0.047 R)
• M44: 11,869,394 km (0.054 R)
• M45: 12,240,696 km (0.111 R)
• M46: 12,499,949 km (0.085 R)
• M47: 12,615,738 km (0.08 R)
• M48: 13,141,275 km (0.071 R)
• M49: 13,318,100 km (0.043 R)
• M50: 13,406,812 km (0.066 R)
• M51: 13,495,673 km (0.029 R)
• M52: 13,584,833 km (0.099 R)
• M53: 13,733,683 km (0.046 R)
• M54: 14,244,111 km (0.038 R)
• M55: 14,365,136 km (0.109 R)
• M56: 15,969,124 km (0.057 R)
• M57: 16,824,225 km (0.075 R)
• M58: 17,564,436 km (0.117 R)
• M59: 17,661,674 km (0.112 R)
• M60: 17,954,736 km (0.095 R)
• M61: 18,216,682 km (0.092 R)
• M62: 18,348,029 km (0.109 R)
• M63: 18,744,164 km (0.076 R)
• M64: 19,477,643 km (0.093 R)
• M65: 19,544,812 km (0.087 R)
• M66: 19,949,325 km (0.087 R)
• M67: 20,527,221 km (0.081 R)
• M68: 20,629,696 km (0.049 R)
• M69: 20,903,909 km (0.113 R)
• M70: 21,076,096 km (0.118 R)
• M71: 21,179,468 km (0.12 R)
• M72: 21,873,453 km (0.091 R)
• M73: 21,978,171 km (0.086 R)
• M74: 22,083,189 km (0.035 R)
• M75: 22,398,840 km (0.106 R)
• M76: 23,212,653 km (0.118 R)
• M77: 23,355,070 km (0.07 R)
• M78: 23,426,428 km (0.08 R)
• M79: 23,640,952 km (0.066 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.56 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 522.4

Radius: 3.7

Gravity: 38.16 G

Time & Orbit

Eccentricity (e): 0.231

Orbit Range: 5.81 AU - 9.31 AU

Year: 13636 Days

Day: 20.2 Hours

Environment

Temp: -235 °C

Axial Tilt: 8.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 67,763,488 km

• M1: 50,863 km (0.054 R)
• M2: 77,492 km (0.108 R)
• M3: 135,087 km (0.055 R)
• M4: 778,208 km (0.097 R)
• M5: 896,839 km (0.105 R)
• M6: 1,379,442 km (0.104 R)
• M7: 1,696,739 km (0.109 R)
• M8: 1,876,705 km (0.11 R)
• M9: 2,199,388 km (0.093 R)
• M10: 2,714,902 km (0.028 R)
• M11: 2,894,719 km (0.097 R)
• M12: 3,951,329 km (0.038 R)
• M13: 4,396,981 km (0.117 R)
• M14: 4,714,876 km (0.119 R)
• M15: 5,485,006 km (0.053 R)
• M16: 6,214,744 km (0.077 R)
• M17: 6,731,455 km (0.105 R)
• M18: 8,146,502 km (0.112 R)
• M19: 8,623,270 km (0.1 R)
• M20: 9,020,153 km (0.065 R)
• M21: 9,558,556 km (0.107 R)
• M22: 9,740,317 km (0.073 R)
• M23: 9,923,126 km (0.071 R)
• M24: 10,245,958 km (0.102 R)
• M25: 10,385,383 km (0.118 R)
• M26: 10,525,407 km (0.079 R)
• M27: 11,282,821 km (0.104 R)
• M28: 12,352,595 km (0.066 R)
• M29: 12,451,330 km (0.077 R)
• M30: 12,600,180 km (0.118 R)
• M31: 13,657,837 km (0.099 R)
• M32: 13,708,999 km (0.069 R)
• M33: 14,223,167 km (0.056 R)
• M34: 14,901,145 km (0.119 R)
• M35: 15,749,963 km (0.074 R)
• M36: 15,857,075 km (0.087 R)
• M37: 16,018,342 km (0.067 R)
• M38: 16,234,211 km (0.079 R)
• M39: 16,997,160 km (0.111 R)
• M40: 18,107,326 km (0.068 R)
• M41: 18,614,463 km (0.056 R)
• M42: 19,758,139 km (0.12 R)
• M43: 20,047,611 km (0.099 R)
• M44: 23,261,721 km (0.066 R)
• M45: 23,935,809 km (0.12 R)
• M46: 26,249,789 km (0.083 R)
• M47: 26,313,368 km (0.053 R)
• M48: 26,631,712 km (0.094 R)
• M49: 26,823,347 km (0.031 R)
• M50: 26,887,375 km (0.104 R)
• M51: 27,401,094 km (0.108 R)
• M52: 27,917,955 km (0.114 R)
• M53: 28,047,656 km (0.117 R)
• M54: 29,092,747 km (0.079 R)
• M55: 29,356,039 km (0.111 R)
• M56: 30,150,553 km (0.063 R)
• M57: 30,350,266 km (0.113 R)
• M58: 32,099,664 km (0.117 R)
• M59: 32,508,066 km (0.061 R)
• M60: 32,986,480 km (0.106 R)
• M61: 33,605,217 km (0.089 R)
• M62: 33,674,181 km (0.11 R)
• M63: 33,812,410 km (0.064 R)
• M64: 34,505,646 km (0.098 R)
• M65: 34,784,347 km (0.089 R)
• M66: 34,993,784 km (0.101 R)
• M67: 35,203,670 km (0.062 R)
• M68: 35,343,843 km (0.097 R)
• M69: 38,546,135 km (0.054 R)
• M70: 39,197,784 km (0.104 R)
• M71: 39,852,873 km (0.086 R)
• M72: 39,998,880 km (0.082 R)
• M73: 40,072,034 km (0.11 R)
• M74: 40,218,340 km (0.085 R)
• M75: 40,364,946 km (0.095 R)
• M76: 41,247,723 km (0.107 R)
• M77: 42,434,782 km (0.048 R)
• M78: 44,009,749 km (0.066 R)
• M79: 44,085,296 km (0.092 R)
• M80: 44,236,390 km (0.115 R)
• M81: 45,527,419 km (0.069 R)
• M82: 45,756,603 km (0.107 R)
• M83: 46,446,249 km (0.082 R)
• M84: 46,830,865 km (0.111 R)
• M85: 47,913,505 km (0.097 R)
• M86: 50,103,319 km (0.104 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.17 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 346.4

Radius: 3.5

Gravity: 28.28 G

Time & Orbit

Eccentricity (e): 0.182

Orbit Range: 6.68 AU - 9.66 AU

Year: 15319 Days

Day: 16.9 Hours

Environment

Temp: -229 °C

Axial Tilt: 0.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 67,763,488 km

• M1: 449,093 km (0.115 R)
• M2: 593,455 km (0.049 R)
• M3: 644,767 km (0.056 R)
• M4: 1,023,100 km (0.057 R)
• M5: 1,105,827 km (0.093 R)
• M6: 1,212,491 km (0.113 R)
• M7: 1,599,052 km (0.074 R)
• M8: 1,646,923 km (0.115 R)
• M9: 1,793,379 km (0.111 R)
• M10: 1,969,606 km (0.076 R)
• M11: 2,151,367 km (0.067 R)
• M12: 2,392,818 km (0.081 R)
• M13: 3,660,510 km (0.091 R)
• M14: 4,578,742 km (0.076 R)
• M15: 5,133,750 km (0.066 R)
• M16: 5,204,510 km (0.109 R)
• M17: 5,240,114 km (0.072 R)
• M18: 5,311,472 km (0.094 R)
• M19: 5,347,226 km (0.066 R)
• M20: 5,383,130 km (0.066 R)
• M21: 6,230,153 km (0.112 R)
• M22: 6,726,967 km (0.093 R)
• M23: 7,236,498 km (0.113 R)
• M24: 7,475,705 km (0.068 R)
• M25: 8,584,375 km (0.057 R)
• M26: 9,050,522 km (0.116 R)
• M27: 9,093,307 km (0.113 R)
• M28: 11,224,777 km (0.087 R)
• M29: 11,827,507 km (0.105 R)
• M30: 11,967,979 km (0.114 R)
• M31: 12,203,446 km (0.079 R)
• M32: 12,822,931 km (0.096 R)
• M33: 13,993,086 km (0.113 R)
• M34: 14,042,603 km (0.06 R)
• M35: 14,092,119 km (0.116 R)
• M36: 14,141,786 km (0.081 R)
• M37: 14,440,682 km (0.119 R)
• M38: 14,641,144 km (0.096 R)
• M39: 14,792,088 km (0.116 R)
• M40: 14,892,917 km (0.096 R)
• M41: 15,759,836 km (0.087 R)
• M42: 16,173,325 km (0.081 R)
• M43: 16,277,296 km (0.034 R)
• M44: 16,329,356 km (0.078 R)
• M45: 17,116,839 km (0.115 R)
• M46: 17,328,969 km (0.039 R)
• M47: 17,702,215 km (0.098 R)
• M48: 18,078,155 km (0.114 R)
• M49: 18,674,153 km (0.093 R)
• M50: 20,951,780 km (0.033 R)
• M51: 21,178,571 km (0.107 R)
• M52: 21,235,418 km (0.108 R)
• M53: 21,520,402 km (0.103 R)
• M54: 21,749,286 km (0.073 R)
• M55: 22,151,705 km (0.105 R)
• M56: 22,614,710 km (0.071 R)
• M57: 22,905,678 km (0.116 R)
• M58: 23,139,350 km (0.111 R)
• M59: 24,022,725 km (0.092 R)
• M60: 24,498,297 km (0.12 R)
• M61: 25,458,865 km (0.05 R)
• M62: 25,579,740 km (0.057 R)
• M63: 25,761,501 km (0.074 R)
• M64: 25,943,712 km (0.096 R)
• M65: 27,230,852 km (0.044 R)
• M66: 28,475,955 km (0.117 R)
• M67: 29,042,332 km (0.057 R)
• M68: 29,422,012 km (0.097 R)
• M69: 30,250,036 km (0.108 R)
• M70: 30,314,064 km (0.109 R)
• M71: 33,505,734 km (0.104 R)
• M72: 33,903,964 km (0.118 R)
• M73: 35,782,315 km (0.052 R)
• M74: 35,849,933 km (0.069 R)
• M75: 36,053,386 km (0.062 R)
• M76: 36,189,221 km (0.07 R)
• M77: 37,213,069 km (0.039 R)
• M78: 39,289,338 km (0.062 R)
• M79: 39,429,062 km (0.103 R)
• M80: 40,411,920 km (0.095 R)
• M81: 40,835,581 km (0.084 R)
• M82: 41,331,797 km (0.097 R)
• M83: 41,544,974 km (0.104 R)
• M84: 42,401,721 km (0.092 R)
• M85: 45,006,370 km (0.078 R)
• M86: 45,372,286 km (0.097 R)
• M87: 45,886,155 km (0.05 R)
• M88: 46,254,315 km (0.108 R)
• M89: 46,549,621 km (0.067 R)
• M90: 46,623,523 km (0.108 R)
• M91: 46,771,475 km (0.093 R)
• M92: 47,513,481 km (0.093 R)
• M93: 47,662,480 km (0.073 R)
• M94: 50,444,701 km (0.093 R)
• M95: 50,596,543 km (0.111 R)

Planet 7 - Ice Giant

Semi-Major Axis: 10.18 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 426.3

Radius: 4.4

Gravity: 22.02 G

Time & Orbit

Eccentricity (e): 0.072

Orbit Range: 9.45 AU - 10.91 AU

Year: 21307 Days

Day: 18.9 Hours

Environment

Temp: -223 °C

Axial Tilt: 20.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (98)

Outer Limit: 67,763,488 km

• M1: 204,799 km (0.101 R)
• M2: 596,447 km (0.05 R)
• M3: 1,255,276 km (0.093 R)
• M4: 1,529,638 km (0.102 R)
• M5: 1,792,182 km (0.046 R)
• M6: 1,822,252 km (0.114 R)
• M7: 2,524,913 km (0.112 R)
• M8: 2,592,531 km (0.117 R)
• M9: 2,764,419 km (0.067 R)
• M10: 3,988,279 km (0.118 R)
• M11: 4,067,117 km (0.106 R)
• M12: 4,106,910 km (0.048 R)
• M13: 4,186,496 km (0.115 R)
• M14: 4,347,464 km (0.045 R)
• M15: 4,510,525 km (0.12 R)
• M16: 5,268,687 km (0.078 R)
• M17: 6,201,879 km (0.114 R)
• M18: 6,710,661 km (0.088 R)
• M19: 6,946,428 km (0.098 R)
• M20: 8,015,604 km (0.071 R)
• M21: 8,115,385 km (0.101 R)
• M22: 8,215,466 km (0.119 R)
• M23: 8,671,141 km (0.112 R)
• M24: 9,239,164 km (0.062 R)
• M25: 9,659,684 km (0.117 R)
• M26: 10,958,642 km (0.109 R)
• M27: 11,571,994 km (0.084 R)
• M28: 14,315,768 km (0.056 R)
• M29: 14,801,812 km (0.111 R)
• M30: 15,355,174 km (0.098 R)
• M31: 15,603,357 km (0.07 R)
• M32: 16,040,781 km (0.12 R)
• M33: 17,183,859 km (0.063 R)
• M34: 17,248,036 km (0.107 R)
• M35: 19,346,745 km (0.038 R)
• M36: 20,154,274 km (0.088 R)
• M37: 20,904,058 km (0.116 R)
• M38: 21,385,913 km (0.111 R)
• M39: 21,593,705 km (0.081 R)
• M40: 22,290,681 km (0.077 R)
• M41: 24,281,230 km (0.117 R)
• M42: 25,884,620 km (0.057 R)
• M43: 26,476,130 km (0.12 R)
• M44: 27,521,969 km (0.118 R)
• M45: 29,192,528 km (0.117 R)
• M46: 29,885,316 km (0.033 R)
• M47: 31,365,737 km (0.079 R)
• M48: 32,551,150 km (0.097 R)
• M49: 32,949,529 km (0.043 R)
• M50: 33,109,300 km (0.068 R)
• M51: 33,349,554 km (0.117 R)
• M52: 34,316,106 km (0.087 R)
• M53: 35,047,191 km (0.053 R)
• M54: 35,210,252 km (0.087 R)
• M55: 35,619,253 km (0.09 R)
• M56: 35,865,342 km (0.091 R)
• M57: 35,947,471 km (0.107 R)
• M58: 37,854,544 km (0.1 R)
• M59: 39,031,281 km (0.118 R)
• M60: 39,454,494 km (0.079 R)
• M61: 40,134,865 km (0.109 R)
• M62: 40,818,976 km (0.11 R)
• M63: 42,198,717 km (0.11 R)
• M64: 43,156,293 km (0.065 R)
• M65: 43,418,538 km (0.066 R)
• M66: 43,681,531 km (0.085 R)
• M67: 43,769,195 km (0.107 R)
• M68: 45,181,250 km (0.092 R)
• M69: 46,160,667 km (0.082 R)
• M70: 46,608,114 km (0.118 R)
• M71: 47,597,555 km (0.099 R)
• M72: 48,049,639 km (0.107 R)
• M73: 48,958,147 km (0.068 R)
• M74: 49,780,487 km (0.12 R)
• M75: 50,239,303 km (0.072 R)
• M76: 50,331,306 km (0.081 R)
• M77: 51,531,679 km (0.085 R)
• M78: 52,088,782 km (0.111 R)
• M79: 52,368,081 km (0.098 R)
• M80: 52,647,979 km (0.078 R)
• M81: 53,209,120 km (0.118 R)
• M82: 53,866,304 km (0.103 R)
• M83: 54,715,272 km (0.085 R)
• M84: 56,235,336 km (0.099 R)
• M85: 56,617,409 km (0.11 R)
• M86: 57,192,313 km (0.08 R)
• M87: 57,384,397 km (0.055 R)
• M88: 57,576,630 km (0.063 R)
• M89: 60,681,983 km (0.112 R)
• M90: 61,270,351 km (0.092 R)
• M91: 63,642,375 km (0.033 R)
• M92: 64,240,018 km (0.115 R)
• M93: 64,939,688 km (0.101 R)
• M94: 65,140,149 km (0.116 R)
• M95: 65,240,379 km (0.105 R)
• M96: 65,541,370 km (0.106 R)
• M97: 65,641,900 km (0.111 R)
• M98: 67,155,083 km (0.092 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 189 - 18,735 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit