🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 1.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 197.3

Radius: 8.8

Gravity: 2.55 G

Time & Orbit

Eccentricity (e): 0.189

Orbit Range: 1.16 AU - 1.7 AU

Year: 1104 Days

Day: 13 Hours

Environment

Temp: -184 °C

Axial Tilt: 19.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 70,932,612 km

• M1: 112,049 km (0.081 R)
• M2: 197,020 km (0.063 R)
• M3: 296,802 km (0.065 R)
• M4: 374,892 km (0.055 R)
• M5: 530,474 km (0.048 R)
• M6: 612,454 km (0.033 R)
• M7: 694,433 km (0.108 R)
• M8: 790,176 km (0.064 R)
• M9: 860,038 km (0.095 R)
• M10: 979,716 km (0.087 R)
• M11: 1,110,615 km (0.06 R)
• M12: 1,253,331 km (0.092 R)
• M13: 1,312,273 km (0.099 R)
• M14: 1,640,191 km (0.103 R)
• M15: 1,744,162 km (0.109 R)
• M16: 1,958,984 km (0.099 R)
• M17: 2,097,661 km (0.093 R)
• M18: 2,182,483 km (0.061 R)
• M19: 2,340,907 km (0.106 R)
• M20: 2,414,360 km (0.102 R)
• M21: 2,601,058 km (0.098 R)
• M22: 2,761,577 km (0.1 R)
• M23: 2,964,880 km (0.059 R)
• M24: 3,028,459 km (0.097 R)
• M25: 3,173,270 km (0.074 R)
• M26: 3,254,651 km (0.079 R)
• M27: 3,369,842 km (0.096 R)
• M28: 3,511,511 km (0.096 R)
• M29: 3,732,018 km (0.067 R)
• M30: 3,826,714 km (0.075 R)
• M31: 3,887,450 km (0.111 R)
• M32: 4,027,324 km (0.111 R)
• M33: 4,285,231 km (0.119 R)
• M34: 4,649,801 km (0.119 R)
• M35: 4,714,577 km (0.102 R)
• M36: 4,882,725 km (0.088 R)
• M37: 4,986,396 km (0.117 R)
• M38: 5,090,965 km (0.104 R)
• M39: 5,167,410 km (0.078 R)
• M40: 5,428,159 km (0.082 R)
• M41: 5,614,408 km (0.08 R)
• M42: 5,713,143 km (0.098 R)
• M43: 5,852,568 km (0.085 R)
• M44: 6,256,931 km (0.103 R)
• M45: 6,359,405 km (0.098 R)
• M46: 6,431,512 km (0.052 R)
• M47: 6,503,917 km (0.107 R)
• M48: 6,659,798 km (0.12 R)
• M49: 6,722,629 km (0.085 R)
• M50: 6,869,833 km (0.085 R)
• M51: 6,975,599 km (0.039 R)

Planet 2 - Gas Giant

Semi-Major Axis: 2.1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 53.7

Radius: 10.3

Gravity: 0.51 G

Time & Orbit

Eccentricity (e): 0.051

Orbit Range: 1.99 AU - 2.21 AU

Year: 1965 Days

Day: 8.8 Hours

Environment

Temp: -186 °C

Axial Tilt: 48.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 70,932,612 km

• M1: 134,937 km (0.103 R)
• M2: 243,545 km (0.075 R)
• M3: 336,894 km (0.097 R)
• M4: 428,897 km (0.108 R)
• M5: 567,724 km (0.117 R)
• M6: 741,407 km (0.109 R)
• M7: 830,418 km (0.112 R)
• M8: 1,014,722 km (0.051 R)
• M9: 1,120,189 km (0.094 R)
• M10: 1,207,404 km (0.083 R)
• M11: 1,274,424 km (0.075 R)
• M12: 1,525,150 km (0.117 R)
• M13: 1,703,471 km (0.098 R)
• M14: 1,856,210 km (0.087 R)
• M15: 2,094,071 km (0.053 R)
• M16: 2,299,918 km (0.074 R)
• M17: 2,384,141 km (0.119 R)
• M18: 2,469,562 km (0.052 R)
• M19: 2,628,584 km (0.103 R)
• M20: 2,888,884 km (0.092 R)
• M21: 2,987,619 km (0.074 R)
• M22: 3,188,828 km (0.082 R)
• M23: 3,338,576 km (0.119 R)
• M24: 3,410,383 km (0.114 R)
• M25: 3,653,479 km (0.115 R)
• M26: 3,935,770 km (0.1 R)
• M27: 4,071,156 km (0.114 R)
• M28: 4,381,422 km (0.069 R)
• M29: 4,735,371 km (0.109 R)
• M30: 4,906,661 km (0.073 R)
• M31: 4,979,515 km (0.052 R)
• M32: 5,089,320 km (0.094 R)
• M33: 5,172,197 km (0.079 R)
• M34: 5,451,945 km (0.082 R)
• M35: 5,517,917 km (0.047 R)
• M36: 5,603,039 km (0.118 R)
• M37: 5,717,481 km (0.053 R)
• M38: 5,784,501 km (0.103 R)
• M39: 5,890,416 km (0.064 R)
• M40: 6,016,378 km (0.107 R)
• M41: 6,143,237 km (0.098 R)
• M42: 6,281,016 km (0.072 R)
• M43: 6,379,900 km (0.09 R)
• M44: 6,459,486 km (0.108 R)
• M45: 6,740,581 km (0.087 R)
• M46: 6,841,859 km (0.025 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 577.9

Radius: 14.3

Gravity: 2.83 G

Time & Orbit

Eccentricity (e): 0.097

Orbit Range: 3.1 AU - 3.76 AU

Year: 4102 Days

Day: 13.1 Hours

Environment

Temp: -209 °C

Axial Tilt: 2.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 70,932,612 km

• M1: 202,705 km (0.046 R)
• M2: 326,722 km (0.096 R)
• M3: 637,586 km (0.098 R)
• M4: 782,247 km (0.079 R)
• M5: 904,768 km (0.083 R)
• M6: 1,108,371 km (0.11 R)
• M7: 1,301,352 km (0.097 R)
• M8: 1,422,975 km (0.057 R)
• M9: 1,722,171 km (0.09 R)
• M10: 1,979,629 km (0.113 R)
• M11: 2,169,319 km (0.066 R)
• M12: 2,282,714 km (0.105 R)
• M13: 2,431,713 km (0.101 R)
• M14: 2,566,800 km (0.093 R)
• M15: 2,898,309 km (0.03 R)
• M16: 3,042,073 km (0.115 R)
• M17: 3,133,178 km (0.109 R)
• M18: 3,393,329 km (0.103 R)
• M19: 3,526,171 km (0.064 R)
• M20: 3,718,853 km (0.084 R)
• M21: 3,895,529 km (0.063 R)
• M22: 4,236,612 km (0.04 R)
• M23: 5,252,232 km (0.114 R)
• M24: 5,450,898 km (0.114 R)
• M25: 5,742,464 km (0.1 R)
• M26: 6,062,005 km (0.118 R)
• M27: 6,224,169 km (0.066 R)
• M28: 6,411,166 km (0.117 R)
• M29: 6,719,039 km (0.103 R)
• M30: 6,886,738 km (0.025 R)
• M31: 7,056,083 km (0.027 R)
• M32: 7,202,240 km (0.096 R)
• M33: 7,349,444 km (0.085 R)
• M34: 7,547,213 km (0.113 R)
• M35: 7,721,793 km (0.07 R)
• M36: 7,897,720 km (0.065 R)
• M37: 8,279,195 km (0.04 R)
• M38: 9,838,005 km (0.112 R)
• M39: 10,359,054 km (0.101 R)
• M40: 10,776,881 km (0.058 R)
• M41: 11,314,087 km (0.095 R)
• M42: 11,831,097 km (0.09 R)
• M43: 11,976,058 km (0.114 R)
• M44: 12,238,602 km (0.073 R)
• M45: 12,414,678 km (0.116 R)
• M46: 12,621,124 km (0.115 R)
• M47: 13,157,432 km (0.103 R)
• M48: 13,247,490 km (0.107 R)
• M49: 13,670,702 km (0.113 R)
• M50: 13,883,879 km (0.103 R)
• M51: 14,623,641 km (0.085 R)
• M52: 14,810,488 km (0.114 R)
• M53: 15,186,877 km (0.1 R)
• M54: 15,376,118 km (0.074 R)
• M55: 15,852,886 km (0.094 R)
• M56: 16,012,806 km (0.106 R)
• M57: 16,463,694 km (0.051 R)
• M58: 16,560,933 km (0.103 R)
• M59: 16,658,321 km (0.098 R)
• M60: 17,312,214 km (0.075 R)
• M61: 17,675,437 km (0.091 R)
• M62: 17,841,491 km (0.049 R)
• M63: 18,476,833 km (0.065 R)
• M64: 18,814,176 km (0.096 R)
• M65: 19,085,696 km (0.043 R)
• M66: 19,324,155 km (0.037 R)
• M67: 19,632,327 km (0.109 R)
• M68: 19,838,622 km (0.111 R)
• M69: 20,636,428 km (0.087 R)
• M70: 21,763,648 km (0.055 R)
• M71: 21,977,274 km (0.082 R)
• M72: 22,622,340 km (0.107 R)
• M73: 24,077,927 km (0.116 R)
• M74: 24,335,684 km (0.076 R)
• M75: 24,742,740 km (0.106 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.64 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 821

Radius: 12.2

Gravity: 5.52 G

Time & Orbit

Eccentricity (e): 0.193

Orbit Range: 2.94 AU - 4.34 AU

Year: 4484 Days

Day: 8.4 Hours

Environment

Temp: -205 °C

Axial Tilt: 23.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (81)

Outer Limit: 70,932,612 km

• M1: 162,164 km (0.112 R)
• M2: 305,928 km (0.042 R)
• M3: 444,455 km (0.048 R)
• M4: 576,999 km (0.106 R)
• M5: 952,938 km (0.05 R)
• M6: 1,104,331 km (0.103 R)
• M7: 1,416,393 km (0.109 R)
• M8: 1,591,123 km (0.034 R)
• M9: 1,689,708 km (0.115 R)
• M10: 2,050,987 km (0.081 R)
• M11: 2,231,851 km (0.118 R)
• M12: 2,648,481 km (0.046 R)
• M13: 2,826,053 km (0.104 R)
• M14: 3,048,505 km (0.119 R)
• M15: 3,425,193 km (0.084 R)
• M16: 3,532,455 km (0.1 R)
• M17: 3,619,221 km (0.117 R)
• M18: 4,154,333 km (0.069 R)
• M19: 4,408,051 km (0.084 R)
• M20: 4,572,309 km (0.089 R)
• M21: 4,930,895 km (0.079 R)
• M22: 5,175,039 km (0.079 R)
• M23: 5,323,590 km (0.085 R)
• M24: 5,777,470 km (0.099 R)
• M25: 6,087,137 km (0.108 R)
• M26: 6,296,574 km (0.076 R)
• M27: 6,535,183 km (0.1 R)
• M28: 6,803,711 km (0.114 R)
• M29: 7,185,934 km (0.084 R)
• M30: 7,268,661 km (0.101 R)
• M31: 7,379,663 km (0.072 R)
• M32: 7,575,038 km (0.115 R)
• M33: 7,687,535 km (0.109 R)
• M34: 8,114,338 km (0.1 R)
• M35: 8,961,361 km (0.119 R)
• M36: 9,319,947 km (0.105 R)
• M37: 9,440,673 km (0.076 R)
• M38: 10,801,714 km (0.096 R)
• M39: 10,960,288 km (0.099 R)
• M40: 11,311,843 km (0.098 R)
• M41: 12,688,293 km (0.089 R)
• M42: 13,430,149 km (0.095 R)
• M43: 13,566,582 km (0.119 R)
• M44: 14,151,510 km (0.119 R)
• M45: 14,290,486 km (0.111 R)
• M46: 14,499,474 km (0.09 R)
• M47: 14,920,892 km (0.107 R)
• M48: 15,026,807 km (0.095 R)
• M49: 15,631,930 km (0.116 R)
• M50: 15,847,501 km (0.113 R)
• M51: 16,245,132 km (0.044 R)
• M52: 16,756,009 km (0.119 R)
• M53: 17,495,022 km (0.111 R)
• M54: 18,206,809 km (0.1 R)
• M55: 18,433,599 km (0.105 R)
• M56: 18,547,443 km (0.061 R)
• M57: 18,699,435 km (0.092 R)
• M58: 19,581,613 km (0.1 R)
• M59: 20,399,016 km (0.059 R)
• M60: 20,713,321 km (0.094 R)
• M61: 20,950,135 km (0.116 R)
• M62: 21,466,247 km (0.082 R)
• M63: 21,705,903 km (0.027 R)
• M64: 21,826,030 km (0.107 R)
• M65: 21,986,549 km (0.104 R)
• M66: 22,389,715 km (0.111 R)
• M67: 22,958,187 km (0.104 R)
• M68: 23,285,058 km (0.101 R)
• M69: 24,026,465 km (0.095 R)
• M70: 24,109,342 km (0.091 R)
• M71: 24,650,139 km (0.084 R)
• M72: 25,998,464 km (0.059 R)
• M73: 26,083,586 km (0.062 R)
• M74: 26,211,342 km (0.098 R)
• M75: 26,424,818 km (0.057 R)
• M76: 27,068,538 km (0.098 R)
• M77: 27,197,940 km (0.099 R)
• M78: 27,891,326 km (0.105 R)
• M79: 28,109,290 km (0.115 R)
• M80: 28,722,492 km (0.079 R)
• M81: 29,606,017 km (0.102 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.82 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 638.3

Radius: 3.1

Gravity: 66.42 G

Time & Orbit

Eccentricity (e): 0.028

Orbit Range: 7.6 AU - 8.04 AU

Year: 14120 Days

Day: 20.5 Hours

Environment

Temp: -219 °C

Axial Tilt: 43.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 70,932,612 km

• M1: 59,390 km (0.096 R)
• M2: 115,938 km (0.045 R)
• M3: 314,455 km (0.065 R)
• M4: 391,498 km (0.115 R)
• M5: 925,712 km (0.048 R)
• M6: 947,553 km (0.118 R)
• M7: 1,176,138 km (0.031 R)
• M8: 1,199,925 km (0.118 R)
• M9: 1,248,095 km (0.111 R)
• M10: 2,042,011 km (0.083 R)
• M11: 2,128,628 km (0.101 R)
• M12: 2,335,073 km (0.072 R)
• M13: 2,364,993 km (0.101 R)
• M14: 2,703,682 km (0.074 R)
• M15: 2,927,032 km (0.103 R)
• M16: 3,425,342 km (0.086 R)
• M17: 3,597,230 km (0.098 R)
• M18: 3,807,266 km (0.045 R)
• M19: 4,093,447 km (0.093 R)
• M20: 4,312,607 km (0.119 R)
• M21: 4,535,508 km (0.119 R)
• M22: 4,648,455 km (0.084 R)
• M23: 7,532,103 km (0.119 R)
• M24: 7,755,453 km (0.12 R)
• M25: 7,980,747 km (0.114 R)
• M26: 9,045,136 km (0.068 R)
• M27: 9,714,437 km (0.079 R)
• M28: 10,202,276 km (0.036 R)
• M29: 11,049,748 km (0.107 R)
• M30: 11,405,192 km (0.066 R)
• M31: 11,764,377 km (0.093 R)
• M32: 12,127,301 km (0.089 R)
• M33: 12,599,282 km (0.115 R)
• M34: 12,704,898 km (0.067 R)
• M35: 13,237,766 km (0.096 R)
• M36: 13,507,042 km (0.1 R)
• M37: 13,886,871 km (0.113 R)
• M38: 14,105,583 km (0.101 R)
• M39: 15,215,749 km (0.052 R)
• M40: 16,353,890 km (0.07 R)
• M41: 16,411,485 km (0.077 R)
• M42: 16,991,326 km (0.099 R)
• M43: 17,755,173 km (0.115 R)
• M44: 18,350,273 km (0.044 R)
• M45: 18,410,112 km (0.077 R)
• M46: 18,470,101 km (0.072 R)
• M47: 19,316,077 km (0.075 R)
• M48: 19,376,963 km (0.09 R)
• M49: 20,733,068 km (0.079 R)
• M50: 21,108,110 km (0.072 R)
• M51: 21,928,654 km (0.086 R)
• M52: 24,123,105 km (0.117 R)
• M53: 24,451,622 km (0.069 R)
• M54: 24,517,595 km (0.107 R)
• M55: 25,646,760 km (0.054 R)
• M56: 26,724,912 km (0.082 R)
• M57: 27,955,354 km (0.102 R)
• M58: 28,369,591 km (0.107 R)
• M59: 29,835,500 km (0.027 R)
• M60: 30,117,492 km (0.088 R)
• M61: 30,613,110 km (0.096 R)
• M62: 30,968,704 km (0.1 R)
• M63: 31,756,038 km (0.106 R)
• M64: 33,204,145 km (0.035 R)
• M65: 34,009,730 km (0.037 R)
• M66: 34,451,941 km (0.089 R)
• M67: 34,673,645 km (0.038 R)
• M68: 35,640,197 km (0.12 R)
• M69: 36,089,290 km (0.068 R)
• M70: 38,899,635 km (0.039 R)
• M71: 39,053,571 km (0.082 R)
• M72: 39,284,700 km (0.119 R)
• M73: 42,490,283 km (0.096 R)
• M74: 42,807,431 km (0.06 R)
• M75: 42,966,304 km (0.04 R)
• M76: 44,164,283 km (0.056 R)
• M77: 44,646,587 km (0.113 R)
• M78: 45,454,116 km (0.1 R)
• M79: 45,535,198 km (0.104 R)
• M80: 47,494,182 km (0.108 R)
• M81: 48,235,889 km (0.086 R)
• M82: 48,649,527 km (0.12 R)
• M83: 48,815,431 km (0.069 R)
• M84: 50,399,971 km (0.054 R)
• M85: 51,747,399 km (0.027 R)
• M86: 52,340,555 km (0.108 R)
• M87: 52,850,833 km (0.082 R)
• M88: 53,790,607 km (0.089 R)
• M89: 54,477,561 km (0.117 R)
• M90: 56,033,678 km (0.106 R)
• M91: 58,924,357 km (0.116 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.46 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 879.4

Radius: 7.3

Gravity: 16.5 G

Time & Orbit

Eccentricity (e): 0

Orbit Range: 8.46 AU - 8.46 AU

Year: 15888 Days

Day: 20.3 Hours

Environment

Temp: -232 °C

Axial Tilt: 11 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 70,932,612 km

• M1: 108,758 km (0.093 R)
• M2: 183,856 km (0.089 R)
• M3: 276,307 km (0.1 R)
• M4: 477,516 km (0.1 R)
• M5: 1,080,246 km (0.033 R)
• M6: 1,184,366 km (0.119 R)
• M7: 1,319,304 km (0.108 R)
• M8: 1,459,477 km (0.11 R)
• M9: 1,545,795 km (0.062 R)
• M10: 1,604,437 km (0.093 R)
• M11: 2,099,905 km (0.063 R)
• M12: 2,535,684 km (0.035 R)
• M13: 2,889,632 km (0.097 R)
• M14: 3,841,524 km (0.095 R)
• M15: 4,042,733 km (0.1 R)
• M16: 4,288,971 km (0.083 R)
• M17: 4,709,939 km (0.039 R)
• M18: 5,100,091 km (0.065 R)
• M19: 5,366,076 km (0.031 R)
• M20: 5,500,863 km (0.07 R)
• M21: 6,285,055 km (0.064 R)
• M22: 6,956,899 km (0.116 R)
• M23: 7,005,818 km (0.1 R)
• M24: 7,251,906 km (0.095 R)
• M25: 7,550,953 km (0.095 R)
• M26: 8,316,146 km (0.115 R)
• M27: 9,919,386 km (0.11 R)
• M28: 10,530,643 km (0.12 R)
• M29: 10,699,539 km (0.092 R)
• M30: 10,869,183 km (0.076 R)
• M31: 12,023,480 km (0.113 R)
• M32: 12,200,006 km (0.101 R)
• M33: 13,276,811 km (0.089 R)
• M34: 13,642,578 km (0.044 R)
• M35: 14,759,476 km (0.07 R)
• M36: 14,885,437 km (0.073 R)
• M37: 15,011,698 km (0.057 R)
• M38: 15,584,358 km (0.111 R)
• M39: 15,712,564 km (0.066 R)
• M40: 16,164,050 km (0.067 R)
• M41: 16,882,269 km (0.094 R)
• M42: 17,079,888 km (0.084 R)
• M43: 18,282,057 km (0.12 R)
• M44: 18,620,746 km (0.083 R)
• M45: 19,580,267 km (0.067 R)
• M46: 20,345,460 km (0.102 R)
• M47: 21,761,553 km (0.061 R)
• M48: 23,355,668 km (0.111 R)
• M49: 25,061,982 km (0.054 R)
• M50: 27,812,488 km (0.038 R)
• M51: 28,123,951 km (0.088 R)
• M52: 28,750,467 km (0.111 R)
• M53: 28,907,694 km (0.065 R)
• M54: 32,440,597 km (0.087 R)
• M55: 34,842,391 km (0.055 R)
• M56: 35,094,164 km (0.082 R)
• M57: 35,768,402 km (0.111 R)
• M58: 35,937,597 km (0.072 R)
• M59: 36,702,342 km (0.104 R)
• M60: 36,787,612 km (0.025 R)
• M61: 36,873,033 km (0.064 R)
• M62: 37,816,547 km (0.096 R)
• M63: 38,507,689 km (0.105 R)
• M64: 38,767,989 km (0.053 R)
• M65: 39,552,181 km (0.091 R)
• M66: 40,959,299 km (0.081 R)
• M67: 44,003,615 km (0.106 R)
• M68: 46,011,967 km (0.097 R)
• M69: 47,770,340 km (0.08 R)
• M70: 47,863,390 km (0.084 R)
• M71: 52,886,288 km (0.091 R)
• M72: 52,982,779 km (0.111 R)
• M73: 54,143,808 km (0.035 R)
• M74: 54,240,897 km (0.102 R)
• M75: 55,704,712 km (0.113 R)
• M76: 56,392,413 km (0.036 R)
• M77: 57,181,692 km (0.101 R)
• M78: 58,870,951 km (0.087 R)
• M79: 59,170,745 km (0.077 R)
• M80: 60,879,302 km (0.058 R)
• M81: 61,993,358 km (0.047 R)
• M82: 62,095,084 km (0.043 R)
• M83: 62,298,388 km (0.095 R)
• M84: 63,012,119 km (0.104 R)
• M85: 63,728,394 km (0.118 R)
• M86: 64,139,040 km (0.108 R)
• M87: 64,653,507 km (0.056 R)
• M88: 64,859,653 km (0.119 R)
• M89: 67,559,595 km (0.064 R)
• M90: 68,712,845 km (0.084 R)
• M91: 69,661,296 km (0.111 R)
• M92: 70,401,955 km (0.087 R)

Kuiper Belt

Range: 30 - 58 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 363 - 15,236 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit