🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.7 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 823.6

Radius: 9.9

Gravity: 8.4 G

Time & Orbit

Eccentricity (e): 0.131

Orbit Range: 0.61 AU - 0.79 AU

Year: 404 Days

Day: 10.3 Hours

Environment

Temp: -150 °C

Axial Tilt: 35.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 37,894,742 km

• M1: 130,898 km (0.04 R)
• M2: 196,871 km (0.084 R)
• M3: 284,535 km (0.093 R)
• M4: 346,469 km (0.112 R)
• M5: 427,850 km (0.077 R)
• M6: 495,917 km (0.081 R)
• M7: 606,320 km (0.1 R)
• M8: 717,621 km (0.059 R)
• M9: 788,830 km (0.064 R)
• M10: 934,388 km (0.086 R)
• M11: 1,089,372 km (0.12 R)
• M12: 1,197,531 km (0.1 R)
• M13: 1,263,354 km (0.116 R)
• M14: 1,356,404 km (0.081 R)
• M15: 1,457,382 km (0.098 R)
• M16: 1,533,378 km (0.113 R)
• M17: 1,706,613 km (0.115 R)
• M18: 1,816,118 km (0.109 R)
• M19: 1,892,413 km (0.055 R)
• M20: 2,030,043 km (0.098 R)
• M21: 2,109,330 km (0.09 R)
• M22: 2,171,114 km (0.11 R)
• M23: 2,264,912 km (0.089 R)
• M24: 2,392,070 km (0.063 R)
• M25: 2,521,771 km (0.082 R)
• M26: 2,594,027 km (0.088 R)
• M27: 2,869,886 km (0.094 R)
• M28: 2,993,902 km (0.099 R)
• M29: 3,063,615 km (0.092 R)
• M30: 3,183,443 km (0.067 R)
• M31: 3,297,735 km (0.114 R)
• M32: 3,377,022 km (0.049 R)
• M33: 3,515,550 km (0.09 R)
• M34: 3,626,252 km (0.073 R)
• M35: 3,745,781 km (0.065 R)
• M36: 3,828,658 km (0.096 R)
• M37: 3,904,504 km (0.062 R)
• M38: 4,080,880 km (0.076 R)
• M39: 4,142,963 km (0.051 R)
• M40: 4,457,717 km (0.116 R)
• M41: 4,553,759 km (0.079 R)
• M42: 4,952,737 km (0.093 R)
• M43: 5,102,185 km (0.07 R)
• M44: 5,295,316 km (0.091 R)
• M45: 5,482,463 km (0.112 R)
• M46: 5,732,291 km (0.051 R)
• M47: 5,889,369 km (0.094 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 874.7

Radius: 13.1

Gravity: 5.1 G

Time & Orbit

Eccentricity (e): 0.034

Orbit Range: 0.74 AU - 0.8 AU

Year: 466 Days

Day: 10.8 Hours

Environment

Temp: -167 °C

Axial Tilt: 33.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (44)

Outer Limit: 37,894,742 km

• M1: 188,942 km (0.055 R)
• M2: 276,906 km (0.111 R)
• M3: 364,570 km (0.04 R)
• M4: 467,493 km (0.088 R)
• M5: 603,627 km (0.103 R)
• M6: 686,056 km (0.117 R)
• M7: 850,613 km (0.095 R)
• M8: 955,332 km (0.073 R)
• M9: 1,064,987 km (0.102 R)
• M10: 1,147,565 km (0.084 R)
• M11: 1,248,693 km (0.104 R)
• M12: 1,341,893 km (0.068 R)
• M13: 1,589,029 km (0.093 R)
• M14: 1,770,491 km (0.078 R)
• M15: 1,863,840 km (0.105 R)
• M16: 1,990,998 km (0.089 R)
• M17: 2,200,884 km (0.055 R)
• M18: 2,322,208 km (0.106 R)
• M19: 2,459,688 km (0.09 R)
• M20: 2,822,912 km (0.099 R)
• M21: 2,977,446 km (0.103 R)
• M22: 3,142,602 km (0.072 R)
• M23: 3,326,309 km (0.085 R)
• M24: 3,442,845 km (0.106 R)
• M25: 3,529,313 km (0.048 R)
• M26: 3,664,250 km (0.113 R)
• M27: 3,784,826 km (0.111 R)
• M28: 3,939,510 km (0.042 R)
• M29: 4,314,403 km (0.069 R)
• M30: 4,442,010 km (0.115 R)
• M31: 4,640,077 km (0.088 R)
• M32: 4,788,329 km (0.039 R)
• M33: 4,894,094 km (0.085 R)
• M34: 5,152,599 km (0.109 R)
• M35: 5,324,487 km (0.066 R)
• M36: 5,525,996 km (0.115 R)
• M37: 5,618,447 km (0.097 R)
• M38: 5,814,121 km (0.026 R)
• M39: 5,927,068 km (0.117 R)
• M40: 6,059,761 km (0.115 R)
• M41: 6,212,500 km (0.041 R)
• M42: 6,444,227 km (0.034 R)
• M43: 6,600,258 km (0.057 R)
• M44: 6,737,888 km (0.117 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 373.5

Radius: 9.4

Gravity: 4.23 G

Time & Orbit

Eccentricity (e): 0.014

Orbit Range: 1.03 AU - 1.05 AU

Year: 732 Days

Day: 12.2 Hours

Environment

Temp: -172 °C

Axial Tilt: 38.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 37,894,742 km

• M1: 119,230 km (0.112 R)
• M2: 181,163 km (0.104 R)
• M3: 241,601 km (0.109 R)
• M4: 304,880 km (0.091 R)
• M5: 369,357 km (0.109 R)
• M6: 484,996 km (0.092 R)
• M7: 556,055 km (0.048 R)
• M8: 618,438 km (0.117 R)
• M9: 710,440 km (0.118 R)
• M10: 821,442 km (0.104 R)
• M11: 943,813 km (0.092 R)
• M12: 1,061,995 km (0.025 R)
• M13: 1,218,175 km (0.03 R)
• M14: 1,347,727 km (0.094 R)
• M15: 1,434,644 km (0.074 R)
• M16: 1,493,735 km (0.075 R)
• M17: 1,553,723 km (0.099 R)
• M18: 1,676,095 km (0.093 R)
• M19: 1,859,502 km (0.081 R)
• M20: 2,197,892 km (0.081 R)
• M21: 2,350,033 km (0.068 R)
• M22: 2,441,437 km (0.096 R)
• M23: 2,584,752 km (0.042 R)
• M24: 2,804,661 km (0.049 R)
• M25: 2,871,980 km (0.058 R)
• M26: 3,023,373 km (0.112 R)
• M27: 3,216,205 km (0.049 R)
• M28: 3,389,439 km (0.077 R)
• M29: 3,541,580 km (0.099 R)
• M30: 3,695,815 km (0.117 R)
• M31: 3,761,489 km (0.109 R)
• M32: 3,835,839 km (0.073 R)
• M33: 3,994,413 km (0.045 R)
• M34: 4,318,292 km (0.118 R)
• M35: 4,413,586 km (0.116 R)
• M36: 4,641,723 km (0.119 R)
• M37: 4,730,434 km (0.065 R)
• M38: 4,936,730 km (0.1 R)
• M39: 5,091,264 km (0.059 R)
• M40: 5,182,818 km (0.055 R)
• M41: 5,330,621 km (0.103 R)
• M42: 5,395,696 km (0.102 R)
• M43: 5,734,535 km (0.083 R)
• M44: 5,935,445 km (0.078 R)
• M45: 6,138,599 km (0.078 R)
• M46: 6,226,413 km (0.086 R)
• M47: 6,304,952 km (0.081 R)
• M48: 6,423,134 km (0.088 R)
• M49: 6,601,904 km (0.053 R)
• M50: 6,772,296 km (0.118 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 302.1

Radius: 11

Gravity: 2.5 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 0.88 AU - 1.22 AU

Year: 743 Days

Day: 7.2 Hours

Environment

Temp: -172 °C

Axial Tilt: 35.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 37,894,742 km

• M1: 157,377 km (0.036 R)
• M2: 236,514 km (0.099 R)
• M3: 333,304 km (0.105 R)
• M4: 402,418 km (0.11 R)
• M5: 485,146 km (0.118 R)
• M6: 671,844 km (0.046 R)
• M7: 743,950 km (0.116 R)
• M8: 841,937 km (0.108 R)
• M9: 925,562 km (0.037 R)
• M10: 1,066,633 km (0.061 R)
• M11: 1,178,831 km (0.11 R)
• M12: 1,262,905 km (0.117 R)
• M13: 1,460,075 km (0.075 R)
• M14: 1,533,827 km (0.073 R)
• M15: 1,638,246 km (0.117 R)
• M16: 1,775,128 km (0.114 R)
• M17: 1,872,666 km (0.082 R)
• M18: 2,028,846 km (0.076 R)
• M19: 2,137,454 km (0.116 R)
• M20: 2,320,861 km (0.057 R)
• M21: 2,475,546 km (0.028 R)
• M22: 2,598,964 km (0.084 R)
• M23: 2,752,601 km (0.064 R)
• M24: 2,859,264 km (0.111 R)
• M25: 3,054,639 km (0.102 R)
• M26: 3,150,232 km (0.072 R)
• M27: 3,239,392 km (0.094 R)
• M28: 3,412,776 km (0.104 R)
• M29: 3,589,302 km (0.101 R)
• M30: 3,816,242 km (0.093 R)
• M31: 4,096,438 km (0.048 R)
• M32: 4,218,660 km (0.094 R)
• M33: 4,309,017 km (0.07 R)
• M34: 4,449,938 km (0.082 R)
• M35: 4,677,028 km (0.117 R)
• M36: 4,779,203 km (0.076 R)
• M37: 4,873,450 km (0.086 R)
• M38: 5,107,571 km (0.03 R)
• M39: 5,327,779 km (0.111 R)
• M40: 5,488,147 km (0.113 R)
• M41: 5,578,056 km (0.114 R)
• M42: 5,704,616 km (0.07 R)
• M43: 5,786,446 km (0.078 R)
• M44: 5,942,327 km (0.083 R)
• M45: 6,062,304 km (0.109 R)
• M46: 6,201,879 km (0.074 R)
• M47: 6,276,827 km (0.101 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 621.4

Radius: 12.3

Gravity: 4.11 G

Time & Orbit

Eccentricity (e): 0.223

Orbit Range: 0.82 AU - 1.28 AU

Year: 743 Days

Day: 9.2 Hours

Environment

Temp: -187 °C

Axial Tilt: 28 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (50)

Outer Limit: 37,894,742 km

• M1: 186,698 km (0.096 R)
• M2: 265,387 km (0.091 R)
• M3: 348,862 km (0.074 R)
• M4: 499,956 km (0.091 R)
• M5: 687,253 km (0.071 R)
• M6: 777,610 km (0.074 R)
• M7: 1,011,581 km (0.094 R)
• M8: 1,122,582 km (0.112 R)
• M9: 1,313,170 km (0.093 R)
• M10: 1,428,959 km (0.096 R)
• M11: 1,528,142 km (0.12 R)
• M12: 1,776,176 km (0.114 R)
• M13: 1,897,948 km (0.119 R)
• M14: 1,993,092 km (0.049 R)
• M15: 2,082,402 km (0.112 R)
• M16: 2,188,318 km (0.117 R)
• M17: 2,288,249 km (0.107 R)
• M18: 2,453,255 km (0.117 R)
• M19: 2,533,141 km (0.094 R)
• M20: 2,803,464 km (0.109 R)
• M21: 2,946,330 km (0.046 R)
• M22: 3,126,446 km (0.075 R)
• M23: 3,283,673 km (0.115 R)
• M24: 3,372,086 km (0.066 R)
• M25: 3,560,729 km (0.09 R)
• M26: 3,642,559 km (0.052 R)
• M27: 3,789,763 km (0.105 R)
• M28: 3,929,487 km (0.074 R)
• M29: 4,052,158 km (0.045 R)
• M30: 4,320,536 km (0.104 R)
• M31: 4,604,772 km (0.053 R)
• M32: 4,714,128 km (0.1 R)
• M33: 4,844,577 km (0.089 R)
• M34: 4,925,510 km (0.083 R)
• M35: 5,129,711 km (0.115 R)
• M36: 5,305,638 km (0.099 R)
• M37: 5,631,462 km (0.076 R)
• M38: 5,823,546 km (0.101 R)
• M39: 6,018,023 km (0.099 R)
• M40: 6,225,515 km (0.108 R)
• M41: 6,302,708 km (0.119 R)
• M42: 6,380,050 km (0.115 R)
• M43: 6,479,981 km (0.071 R)
• M44: 6,771,847 km (0.06 R)
• M45: 6,907,981 km (0.069 R)
• M46: 7,217,798 km (0.108 R)
• M47: 7,368,443 km (0.086 R)
• M48: 7,602,564 km (0.052 R)
• M49: 8,017,997 km (0.089 R)
• M50: 8,186,295 km (0.058 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.19 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 108.8

Radius: 12.8

Gravity: 0.66 G

Time & Orbit

Eccentricity (e): 0.211

Orbit Range: 0.94 AU - 1.44 AU

Year: 896 Days

Day: 14.6 Hours

Environment

Temp: -183 °C

Axial Tilt: 37.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (31)

Outer Limit: 37,894,742 km

• M1: 169,345 km (0.111 R)
• M2: 256,560 km (0.116 R)
• M3: 343,028 km (0.098 R)
• M4: 466,596 km (0.115 R)
• M5: 675,584 km (0.073 R)
• M6: 796,609 km (0.103 R)
• M7: 905,815 km (0.062 R)
• M8: 1,037,312 km (0.044 R)
• M9: 1,265,748 km (0.102 R)
• M10: 1,501,364 km (0.033 R)
• M11: 1,609,823 km (0.053 R)
• M12: 1,793,080 km (0.081 R)
• M13: 1,908,719 km (0.087 R)
• M14: 2,164,232 km (0.031 R)
• M15: 2,367,685 km (0.088 R)
• M16: 2,565,753 km (0.071 R)
• M17: 2,799,724 km (0.099 R)
• M18: 2,941,094 km (0.095 R)
• M19: 3,040,876 km (0.107 R)
• M20: 3,373,282 km (0.109 R)
• M21: 3,504,181 km (0.1 R)
• M22: 3,859,775 km (0.113 R)
• M23: 4,163,758 km (0.059 R)
• M24: 4,262,193 km (0.101 R)
• M25: 4,432,735 km (0.108 R)
• M26: 4,518,903 km (0.025 R)
• M27: 4,612,850 km (0.112 R)
• M28: 4,700,215 km (0.095 R)
• M29: 4,913,542 km (0.038 R)
• M30: 5,025,142 km (0.047 R)
• M31: 5,160,229 km (0.089 R)

Planet 7 - Ice Giant

Semi-Major Axis: 8.08 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 962.9

Radius: 4.1

Gravity: 57.28 G

Time & Orbit

Eccentricity (e): 0.232

Orbit Range: 6.21 AU - 9.95 AU

Year: 15854 Days

Day: 24.7 Hours

Environment

Temp: -233 °C

Axial Tilt: 19.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 37,894,742 km

• M1: 257,308 km (0.082 R)
• M2: 508,334 km (0.076 R)
• M3: 591,360 km (0.109 R)
• M4: 842,236 km (0.1 R)
• M5: 1,431,203 km (0.112 R)
• M6: 1,988,006 km (0.053 R)
• M7: 2,220,930 km (0.094 R)
• M8: 2,392,668 km (0.089 R)
• M9: 2,427,525 km (0.117 R)
• M10: 3,954,769 km (0.047 R)
• M11: 3,996,058 km (0.054 R)
• M12: 4,037,497 km (0.078 R)
• M13: 5,074,509 km (0.096 R)
• M14: 5,437,583 km (0.111 R)
• M15: 5,575,961 km (0.105 R)
• M16: 5,668,712 km (0.107 R)
• M17: 5,903,132 km (0.07 R)
• M18: 6,284,756 km (0.067 R)
• M19: 6,478,485 km (0.103 R)
• M20: 6,576,173 km (0.111 R)
• M21: 8,628,506 km (0.092 R)
• M22: 9,667,014 km (0.118 R)
• M23: 10,514,337 km (0.068 R)
• M24: 10,802,013 km (0.089 R)
• M25: 11,267,712 km (0.097 R)
• M26: 12,887,258 km (0.096 R)
• M27: 14,069,829 km (0.091 R)
• M28: 14,386,678 km (0.053 R)
• M29: 14,450,406 km (0.045 R)
• M30: 14,770,097 km (0.096 R)
• M31: 15,416,659 km (0.061 R)
• M32: 15,940,401 km (0.03 R)
• M33: 16,337,135 km (0.096 R)
• M34: 16,536,698 km (0.094 R)
• M35: 16,670,140 km (0.095 R)
• M36: 17,207,645 km (0.115 R)
• M37: 17,275,263 km (0.116 R)
• M38: 17,750,835 km (0.113 R)
• M39: 19,484,225 km (0.063 R)
• M40: 19,908,335 km (0.111 R)
• M41: 21,126,062 km (0.077 R)
• M42: 21,634,395 km (0.098 R)
• M43: 21,780,403 km (0.115 R)
• M44: 22,073,315 km (0.111 R)
• M45: 24,539,736 km (0.111 R)
• M46: 24,768,171 km (0.095 R)
• M47: 25,689,246 km (0.094 R)
• M48: 26,231,837 km (0.111 R)
• M49: 28,679,109 km (0.101 R)
• M50: 29,807,974 km (0.069 R)
• M51: 30,133,200 km (0.113 R)
• M52: 30,541,452 km (0.08 R)
• M53: 30,705,262 km (0.081 R)
• M54: 34,636,993 km (0.12 R)
• M55: 35,150,264 km (0.104 R)
• M56: 35,407,871 km (0.086 R)
• M57: 36,097,667 km (0.032 R)
• M58: 36,966,232 km (0.09 R)
• M59: 37,053,448 km (0.095 R)
• M60: 38,017,606 km (0.092 R)
• M61: 38,370,208 km (0.079 R)
• M62: 39,256,576 km (0.085 R)
• M63: 39,880,997 km (0.105 R)
• M64: 41,230,071 km (0.089 R)
• M65: 42,046,726 km (0.087 R)
• M66: 42,137,831 km (0.049 R)
• M67: 44,621,155 km (0.105 R)
• M68: 44,993,056 km (0.093 R)
• M69: 45,272,804 km (0.114 R)
• M70: 46,397,032 km (0.082 R)
• M71: 46,679,472 km (0.081 R)
• M72: 47,151,603 km (0.089 R)
• M73: 50,985,049 km (0.06 R)
• M74: 51,568,630 km (0.113 R)
• M75: 52,742,375 km (0.111 R)
• M76: 53,332,538 km (0.094 R)
• M77: 53,431,123 km (0.084 R)
• M78: 55,615,103 km (0.069 R)
• M79: 56,215,888 km (0.104 R)
• M80: 57,828,104 km (0.078 R)
• M81: 58,538,395 km (0.094 R)
• M82: 60,686,022 km (0.084 R)
• M83: 61,304,459 km (0.112 R)
• M84: 61,407,682 km (0.105 R)
• M85: 61,614,426 km (0.044 R)
• M86: 62,132,184 km (0.104 R)
• M87: 63,903,423 km (0.098 R)
• M88: 64,112,860 km (0.067 R)
• M89: 66,432,076 km (0.116 R)
• M90: 67,815,258 km (0.116 R)
• M91: 68,885,780 km (0.087 R)
• M92: 69,530,846 km (0.054 R)
• M93: 70,393,876 km (0.115 R)
• M94: 72,021,800 km (0.086 R)

Planet 8 - Ice Giant

Semi-Major Axis: 8.61 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 111.3

Radius: 4.8

Gravity: 4.83 G

Time & Orbit

Eccentricity (e): 0.203

Orbit Range: 6.86 AU - 10.36 AU

Year: 17439 Days

Day: 17.6 Hours

Environment

Temp: -235 °C

Axial Tilt: 0.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 37,894,742 km

• M1: 397,033 km (0.111 R)
• M2: 574,605 km (0.098 R)
• M3: 643,720 km (0.116 R)
• M4: 805,884 km (0.07 R)
• M5: 1,346,979 km (0.082 R)
• M6: 1,383,930 km (0.084 R)
• M7: 2,301,862 km (0.077 R)
• M8: 3,292,649 km (0.12 R)
• M9: 3,726,782 km (0.101 R)
• M10: 3,857,830 km (0.099 R)
• M11: 4,452,631 km (0.033 R)
• M12: 4,675,981 km (0.08 R)
• M13: 4,817,500 km (0.105 R)
• M14: 5,133,601 km (0.087 R)
• M15: 5,605,432 km (0.077 R)
• M16: 5,968,357 km (0.112 R)
• M17: 6,526,955 km (0.119 R)
• M18: 6,972,906 km (0.076 R)
• M19: 7,297,384 km (0.114 R)
• M20: 9,345,529 km (0.039 R)
• M21: 11,253,201 km (0.098 R)
• M22: 11,329,047 km (0.111 R)
• M23: 11,671,775 km (0.079 R)
• M24: 13,920,830 km (0.1 R)
• M25: 15,115,070 km (0.11 R)
• M26: 15,660,952 km (0.084 R)
• M27: 15,787,811 km (0.119 R)
• M28: 15,830,147 km (0.028 R)
• M29: 16,000,091 km (0.031 R)
• M30: 20,577,337 km (0.052 R)
• M31: 20,902,114 km (0.101 R)
• M32: 21,181,862 km (0.039 R)
• M33: 23,415,807 km (0.083 R)
• M34: 23,998,042 km (0.094 R)
• M35: 24,880,370 km (0.11 R)
• M36: 26,324,139 km (0.044 R)
• M37: 26,525,348 km (0.112 R)
• M38: 26,676,741 km (0.058 R)
• M39: 27,132,267 km (0.035 R)
• M40: 27,284,707 km (0.103 R)
• M41: 27,437,446 km (0.076 R)
• M42: 27,641,498 km (0.115 R)
• M43: 27,999,785 km (0.099 R)
• M44: 28,669,235 km (0.118 R)
• M45: 29,971,485 km (0.078 R)
• M46: 31,826,947 km (0.044 R)
• M47: 33,229,128 km (0.063 R)
• M48: 35,203,521 km (0.073 R)
• M49: 35,480,875 km (0.104 R)
• M50: 35,703,177 km (0.106 R)
• M51: 36,316,828 km (0.082 R)

Kuiper Belt

Range: 30 - 56 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 274 - 17,872 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit