🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 760.6

Radius: 12.2

Gravity: 5.11 G

Time & Orbit

Eccentricity (e): 0.089

Orbit Range: 0.65 AU - 0.77 AU

Year: 386 Days

Day: 6.3 Hours

Environment

Temp: -149 °C

Axial Tilt: 1.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (40)

Outer Limit: 48,551,982 km

• M1: 160,818 km (0.098 R)
• M2: 247,435 km (0.115 R)
• M3: 342,280 km (0.085 R)
• M4: 475,572 km (0.111 R)
• M5: 559,346 km (0.12 R)
• M6: 652,845 km (0.095 R)
• M7: 768,634 km (0.039 R)
• M8: 904,768 km (0.119 R)
• M9: 987,196 km (0.081 R)
• M10: 1,222,065 km (0.111 R)
• M11: 1,319,304 km (0.113 R)
• M12: 1,434,644 km (0.072 R)
• M13: 1,532,481 km (0.053 R)
• M14: 1,611,468 km (0.072 R)
• M15: 1,713,644 km (0.058 R)
• M16: 1,806,993 km (0.104 R)
• M17: 2,016,280 km (0.076 R)
• M18: 2,126,833 km (0.103 R)
• M19: 2,239,630 km (0.075 R)
• M20: 2,342,254 km (0.111 R)
• M21: 2,446,524 km (0.068 R)
• M22: 2,564,855 km (0.077 R)
• M23: 2,653,417 km (0.097 R)
• M24: 2,794,638 km (0.094 R)
• M25: 3,037,884 km (0.097 R)
• M26: 3,192,568 km (0.089 R)
• M27: 3,350,095 km (0.066 R)
• M28: 3,566,413 km (0.052 R)
• M29: 3,672,777 km (0.099 R)
• M30: 3,801,880 km (0.076 R)
• M31: 4,042,434 km (0.097 R)
• M32: 4,153,585 km (0.107 R)
• M33: 4,250,674 km (0.112 R)
• M34: 4,355,991 km (0.083 R)
• M35: 4,623,472 km (0.103 R)
• M36: 4,810,020 km (0.118 R)
• M37: 5,086,477 km (0.095 R)
• M38: 5,238,917 km (0.085 R)
• M39: 5,384,626 km (0.073 R)
• M40: 5,572,820 km (0.1 R)

Planet 2 - Gas Giant

Semi-Major Axis: 2.44 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 956.2

Radius: 9

Gravity: 11.8 G

Time & Orbit

Eccentricity (e): 0.147

Orbit Range: 2.08 AU - 2.8 AU

Year: 2461 Days

Day: 9.7 Hours

Environment

Temp: -206 °C

Axial Tilt: 5.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 48,551,982 km

• M1: 121,623 km (0.118 R)
• M2: 237,412 km (0.096 R)
• M3: 533,167 km (0.11 R)
• M4: 594,352 km (0.102 R)
• M5: 783,594 km (0.084 R)
• M6: 1,047,783 km (0.099 R)
• M7: 1,243,458 km (0.07 R)
• M8: 1,339,799 km (0.095 R)
• M9: 1,451,099 km (0.101 R)
• M10: 1,565,691 km (0.115 R)
• M11: 1,736,682 km (0.1 R)
• M12: 2,139,998 km (0.075 R)
• M13: 2,241,874 km (0.098 R)
• M14: 2,375,016 km (0.112 R)
• M15: 2,511,000 km (0.091 R)
• M16: 2,711,910 km (0.079 R)
• M17: 2,918,206 km (0.085 R)
• M18: 3,362,960 km (0.048 R)
• M19: 3,498,795 km (0.061 R)
• M20: 3,567,460 km (0.1 R)
• M21: 3,828,958 km (0.102 R)
• M22: 4,114,839 km (0.083 R)
• M23: 4,205,645 km (0.117 R)
• M24: 4,426,152 km (0.108 R)
• M25: 4,840,538 km (0.061 R)
• M26: 5,013,623 km (0.085 R)
• M27: 5,425,466 km (0.051 R)
• M28: 5,485,156 km (0.101 R)
• M29: 5,665,720 km (0.116 R)
• M30: 5,930,060 km (0.09 R)
• M31: 6,012,189 km (0.032 R)
• M32: 6,115,411 km (0.079 R)
• M33: 6,768,406 km (0.083 R)
• M34: 6,875,817 km (0.065 R)
• M35: 7,289,306 km (0.117 R)
• M36: 7,465,682 km (0.095 R)
• M37: 7,665,993 km (0.092 R)
• M38: 7,778,042 km (0.099 R)
• M39: 8,026,375 km (0.037 R)
• M40: 8,094,591 km (0.086 R)
• M41: 8,484,742 km (0.04 R)
• M42: 8,647,056 km (0.051 R)
• M43: 9,022,248 km (0.104 R)
• M44: 9,164,366 km (0.117 R)
• M45: 9,546,738 km (0.115 R)
• M46: 9,691,548 km (0.077 R)
• M47: 9,764,253 km (0.103 R)
• M48: 10,130,319 km (0.093 R)
• M49: 10,825,650 km (0.068 R)
• M50: 11,052,440 km (0.032 R)
• M51: 11,587,701 km (0.096 R)
• M52: 12,079,280 km (0.082 R)
• M53: 12,288,268 km (0.099 R)
• M54: 12,577,740 km (0.119 R)
• M55: 12,895,935 km (0.116 R)
• M56: 13,109,561 km (0.119 R)
• M57: 13,216,822 km (0.098 R)
• M58: 13,784,845 km (0.097 R)
• M59: 14,360,797 km (0.076 R)
• M60: 15,422,942 km (0.065 R)
• M61: 15,820,573 km (0.111 R)
• M62: 15,963,439 km (0.106 R)
• M63: 16,279,240 km (0.083 R)
• M64: 16,510,219 km (0.098 R)
• M65: 16,887,804 km (0.091 R)
• M66: 17,268,232 km (0.082 R)
• M67: 17,415,436 km (0.111 R)
• M68: 17,948,453 km (0.111 R)
• M69: 18,127,223 km (0.062 R)
• M70: 18,187,062 km (0.118 R)
• M71: 18,336,660 km (0.07 R)
• M72: 18,396,649 km (0.08 R)
• M73: 19,518,184 km (0.109 R)
• M74: 19,794,192 km (0.111 R)
• M75: 20,133,480 km (0.116 R)
• M76: 20,817,740 km (0.081 R)
• M77: 20,880,422 km (0.054 R)

Planet 3 - Gas Giant

Semi-Major Axis: 3.61 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 532.8

Radius: 11.3

Gravity: 4.17 G

Time & Orbit

Eccentricity (e): 0.079

Orbit Range: 3.32 AU - 3.9 AU

Year: 4429 Days

Day: 5.8 Hours

Environment

Temp: -198 °C

Axial Tilt: 19.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 48,551,982 km

• M1: 146,905 km (0.045 R)
• M2: 272,867 km (0.04 R)
• M3: 416,780 km (0.078 R)
• M4: 749,635 km (0.084 R)
• M5: 874,549 km (0.116 R)
• M6: 982,559 km (0.111 R)
• M7: 1,334,413 km (0.076 R)
• M8: 1,755,381 km (0.113 R)
• M9: 2,316,972 km (0.109 R)
• M10: 2,609,286 km (0.065 R)
• M11: 2,913,568 km (0.048 R)
• M12: 3,286,366 km (0.071 R)
• M13: 3,575,988 km (0.083 R)
• M14: 3,714,066 km (0.054 R)
• M15: 3,813,848 km (0.048 R)
• M16: 4,097,785 km (0.116 R)
• M17: 4,242,446 km (0.114 R)
• M18: 4,643,668 km (0.096 R)
• M19: 5,392,106 km (0.082 R)
• M20: 5,550,979 km (0.085 R)
• M21: 5,826,687 km (0.054 R)
• M22: 6,036,573 km (0.091 R)
• M23: 6,511,995 km (0.051 R)
• M24: 6,729,810 km (0.066 R)
• M25: 6,852,031 km (0.095 R)
• M26: 7,222,735 km (0.102 R)
• M27: 7,372,931 km (0.048 R)
• M28: 7,448,328 km (0.051 R)
• M29: 7,829,504 km (0.118 R)
• M30: 7,983,889 km (0.081 R)
• M31: 8,321,681 km (0.116 R)
• M32: 8,400,220 km (0.096 R)
• M33: 8,823,731 km (0.079 R)
• M34: 8,957,621 km (0.071 R)
• M35: 9,526,841 km (0.106 R)
• M36: 9,940,779 km (0.071 R)
• M37: 10,360,550 km (0.112 R)
• M38: 10,586,742 km (0.104 R)
• M39: 10,958,044 km (0.094 R)
• M40: 11,101,957 km (0.099 R)
• M41: 11,860,418 km (0.037 R)
• M42: 12,156,622 km (0.095 R)
• M43: 12,907,753 km (0.09 R)
• M44: 13,243,002 km (0.116 R)
• M45: 13,612,060 km (0.108 R)
• M46: 13,704,960 km (0.082 R)
• M47: 14,046,941 km (0.118 R)
• M48: 14,707,864 km (0.103 R)
• M49: 14,835,022 km (0.12 R)
• M50: 15,411,124 km (0.071 R)
• M51: 15,540,227 km (0.051 R)
• M52: 15,734,405 km (0.097 R)
• M53: 15,831,943 km (0.117 R)
• M54: 16,027,317 km (0.06 R)
• M55: 16,420,610 km (0.056 R)
• M56: 17,216,920 km (0.067 R)
• M57: 17,653,446 km (0.118 R)
• M58: 17,890,110 km (0.053 R)
• M59: 18,161,780 km (0.088 R)
• M60: 19,610,336 km (0.075 R)
• M61: 20,703,298 km (0.05 R)
• M62: 20,917,073 km (0.07 R)
• M63: 21,563,037 km (0.064 R)
• M64: 22,361,291 km (0.118 R)
• M65: 22,470,947 km (0.062 R)
• M66: 22,653,905 km (0.097 R)
• M67: 22,800,810 km (0.088 R)
• M68: 22,874,262 km (0.116 R)
• M69: 23,021,616 km (0.115 R)
• M70: 23,762,874 km (0.11 R)
• M71: 24,474,361 km (0.115 R)
• M72: 24,700,404 km (0.05 R)
• M73: 24,813,799 km (0.116 R)
• M74: 24,889,495 km (0.082 R)
• M75: 25,078,886 km (0.047 R)
• M76: 25,154,882 km (0.11 R)
• M77: 25,421,166 km (0.115 R)
• M78: 25,497,311 km (0.09 R)
• M79: 25,611,903 km (0.09 R)

Planet 4 - Gas Giant

Semi-Major Axis: 4.46 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 213.6

Radius: 8.8

Gravity: 2.76 G

Time & Orbit

Eccentricity (e): 0.249

Orbit Range: 3.35 AU - 5.57 AU

Year: 6082 Days

Day: 10.2 Hours

Environment

Temp: -223 °C

Axial Tilt: 45.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 48,551,982 km

• M1: 122,969 km (0.05 R)
• M2: 206,744 km (0.026 R)
• M3: 268,079 km (0.03 R)
• M4: 384,766 km (0.101 R)
• M5: 485,445 km (0.069 R)
• M6: 558,150 km (0.086 R)
• M7: 644,767 km (0.082 R)
• M8: 768,035 km (0.062 R)
• M9: 1,015,022 km (0.075 R)
• M10: 1,824,047 km (0.097 R)
• M11: 2,002,367 km (0.09 R)
• M12: 2,344,199 km (0.113 R)
• M13: 2,738,090 km (0.031 R)
• M14: 2,942,889 km (0.072 R)
• M15: 3,152,626 km (0.047 R)
• M16: 3,367,448 km (0.06 R)
• M17: 3,531,707 km (0.1 R)
• M18: 3,624,158 km (0.05 R)
• M19: 3,736,057 km (0.082 R)
• M20: 3,963,446 km (0.075 R)
• M21: 4,352,550 km (0.085 R)
• M22: 4,571,861 km (0.119 R)
• M23: 4,754,071 km (0.052 R)
• M24: 5,420,828 km (0.054 R)
• M25: 5,830,727 km (0.118 R)
• M26: 5,984,364 km (0.094 R)
• M27: 6,116,907 km (0.053 R)
• M28: 6,228,358 km (0.028 R)
• M29: 6,362,697 km (0.119 R)
• M30: 6,634,666 km (0.114 R)
• M31: 6,771,996 km (0.102 R)
• M32: 7,026,313 km (0.072 R)
• M33: 7,283,771 km (0.086 R)
• M34: 7,711,770 km (0.076 R)
• M35: 7,953,072 km (0.088 R)
• M36: 8,025,926 km (0.096 R)
• M37: 8,196,916 km (0.076 R)
• M38: 8,319,736 km (0.082 R)
• M39: 8,943,260 km (0.034 R)
• M40: 9,171,397 km (0.076 R)
• M41: 9,401,329 km (0.055 R)
• M42: 10,875,316 km (0.098 R)
• M43: 11,556,286 km (0.087 R)
• M44: 12,027,220 km (0.071 R)
• M45: 12,278,993 km (0.098 R)
• M46: 12,335,242 km (0.038 R)
• M47: 12,589,259 km (0.1 R)
• M48: 12,873,495 km (0.083 R)
• M49: 13,390,655 km (0.074 R)
• M50: 13,535,466 km (0.025 R)
• M51: 13,593,510 km (0.095 R)
• M52: 13,680,725 km (0.117 R)
• M53: 13,768,240 km (0.113 R)
• M54: 14,356,160 km (0.083 R)
• M55: 14,862,249 km (0.114 R)
• M56: 15,192,861 km (0.101 R)
• M57: 15,525,865 km (0.076 R)
• M58: 16,694,823 km (0.089 R)
• M59: 17,038,599 km (0.117 R)
• M60: 17,542,594 km (0.098 R)
• M61: 17,796,462 km (0.077 R)
• M62: 18,211,596 km (0.083 R)
• M63: 18,307,937 km (0.075 R)
• M64: 18,533,231 km (0.052 R)
• M65: 19,181,888 km (0.075 R)
• M66: 19,509,058 km (0.108 R)
• M67: 19,706,228 km (0.065 R)
• M68: 20,434,770 km (0.1 R)
• M69: 22,089,173 km (0.102 R)
• M70: 22,569,681 km (0.089 R)

Planet 5 - Gas Giant

Semi-Major Axis: 5.6 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 379.2

Radius: 13.2

Gravity: 2.18 G

Time & Orbit

Eccentricity (e): 0.126

Orbit Range: 4.89 AU - 6.31 AU

Year: 8557 Days

Day: 9.9 Hours

Environment

Temp: -214 °C

Axial Tilt: 8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 48,551,982 km

• M1: 194,328 km (0.103 R)
• M2: 338,540 km (0.043 R)
• M3: 457,321 km (0.047 R)
• M4: 735,872 km (0.106 R)
• M5: 832,213 km (0.116 R)
• M6: 1,348,326 km (0.086 R)
• M7: 1,577,210 km (0.06 R)
• M8: 1,743,414 km (0.048 R)
• M9: 1,838,259 km (0.11 R)
• M10: 1,935,048 km (0.1 R)
• M11: 2,423,934 km (0.087 R)
• M12: 3,134,674 km (0.101 R)
• M13: 3,298,633 km (0.094 R)
• M14: 3,586,310 km (0.059 R)
• M15: 3,857,381 km (0.082 R)
• M16: 4,135,184 km (0.084 R)
• M17: 4,657,431 km (0.065 R)
• M18: 4,791,171 km (0.035 R)
• M19: 4,926,407 km (0.077 R)
• M20: 5,508,044 km (0.077 R)
• M21: 5,965,963 km (0.109 R)
• M22: 6,170,164 km (0.043 R)
• M23: 6,675,805 km (0.1 R)
• M24: 7,443,840 km (0.025 R)
• M25: 7,632,483 km (0.091 R)
• M26: 7,727,328 km (0.066 R)
• M27: 8,046,421 km (0.11 R)
• M28: 8,500,450 km (0.106 R)
• M29: 8,896,286 km (0.096 R)
• M30: 9,433,642 km (0.09 R)
• M31: 9,535,518 km (0.075 R)
• M32: 9,637,843 km (0.086 R)
• M33: 10,574,924 km (0.059 R)
• M34: 10,822,658 km (0.114 R)
• M35: 11,036,583 km (0.088 R)
• M36: 11,215,801 km (0.091 R)
• M37: 11,504,675 km (0.095 R)
• M38: 11,906,046 km (0.104 R)
• M39: 12,237,854 km (0.044 R)
• M40: 12,948,294 km (0.026 R)
• M41: 13,403,969 km (0.077 R)
• M42: 13,787,688 km (0.103 R)
• M43: 14,058,460 km (0.114 R)
• M44: 14,409,267 km (0.079 R)
• M45: 14,605,390 km (0.111 R)
• M46: 15,000,328 km (0.056 R)
• M47: 15,119,408 km (0.085 R)
• M48: 16,328,458 km (0.058 R)
• M49: 16,656,077 km (0.074 R)
• M50: 16,738,356 km (0.083 R)
• M51: 16,861,924 km (0.103 R)
• M52: 19,138,953 km (0.113 R)
• M53: 19,614,674 km (0.036 R)
• M54: 19,701,591 km (0.073 R)
• M55: 20,269,464 km (0.077 R)
• M56: 20,489,373 km (0.1 R)
• M57: 20,842,873 km (0.111 R)
• M58: 21,020,296 km (0.098 R)
• M59: 21,242,898 km (0.068 R)
• M60: 21,332,208 km (0.077 R)
• M61: 23,005,909 km (0.109 R)
• M62: 23,281,318 km (0.037 R)
• M63: 23,419,397 km (0.108 R)
• M64: 23,881,654 km (0.075 R)
• M65: 25,050,612 km (0.116 R)
• M66: 26,094,805 km (0.071 R)
• M67: 27,590,036 km (0.036 R)
• M68: 28,078,324 km (0.108 R)
• M69: 28,865,657 km (0.068 R)
• M70: 30,160,277 km (0.08 R)
• M71: 30,361,187 km (0.104 R)
• M72: 31,219,729 km (0.103 R)
• M73: 32,702,992 km (0.109 R)
• M74: 33,219,703 km (0.101 R)
• M75: 33,583,076 km (0.094 R)
• M76: 34,996,776 km (0.075 R)
• M77: 35,419,540 km (0.115 R)

Asteroid Belt

Center: 5.88 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 6 - Ice Giant

Semi-Major Axis: 6.15 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 734.1

Radius: 8

Gravity: 11.47 G

Time & Orbit

Eccentricity (e): 0.241

Orbit Range: 4.67 AU - 7.63 AU

Year: 9848 Days

Day: 19.5 Hours

Environment

Temp: -222 °C

Axial Tilt: 26.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (90)

Outer Limit: 48,551,982 km

• M1: 236,514 km (0.094 R)
• M2: 302,636 km (0.102 R)
• M3: 625,020 km (0.097 R)
• M4: 724,502 km (0.09 R)
• M5: 958,623 km (0.079 R)
• M6: 1,035,516 km (0.036 R)
• M7: 1,216,530 km (0.098 R)
• M8: 1,364,333 km (0.11 R)
• M9: 1,540,708 km (0.036 R)
• M10: 2,063,553 km (0.108 R)
• M11: 2,189,664 km (0.106 R)
• M12: 3,258,840 km (0.088 R)
• M13: 4,207,739 km (0.086 R)
• M14: 4,336,094 km (0.071 R)
• M15: 5,339,746 km (0.052 R)
• M16: 5,478,872 km (0.116 R)
• M17: 5,867,677 km (0.085 R)
• M18: 6,011,291 km (0.103 R)
• M19: 6,338,611 km (0.119 R)
• M20: 6,709,165 km (0.066 R)
• M21: 7,010,755 km (0.101 R)
• M22: 7,432,621 km (0.103 R)
• M23: 7,902,358 km (0.034 R)
• M24: 7,981,495 km (0.111 R)
• M25: 8,180,760 km (0.114 R)
• M26: 8,706,446 km (0.058 R)
• M27: 9,076,701 km (0.09 R)
• M28: 9,326,380 km (0.118 R)
• M29: 9,747,648 km (0.048 R)
• M30: 10,608,883 km (0.114 R)
• M31: 11,092,832 km (0.074 R)
• M32: 11,494,203 km (0.106 R)
• M33: 12,128,049 km (0.099 R)
• M34: 12,819,640 km (0.114 R)
• M35: 13,053,013 km (0.035 R)
• M36: 13,571,369 km (0.108 R)
• M37: 13,713,936 km (0.069 R)
• M38: 14,289,289 km (0.113 R)
• M39: 14,628,428 km (0.081 R)
• M40: 15,019,327 km (0.096 R)
• M41: 15,512,701 km (0.057 R)
• M42: 15,612,034 km (0.115 R)
• M43: 16,667,896 km (0.037 R)
• M44: 16,871,498 km (0.098 R)
• M45: 16,973,674 km (0.065 R)
• M46: 17,076,148 km (0.092 R)
• M47: 17,591,064 km (0.113 R)
• M48: 20,132,881 km (0.068 R)
• M49: 20,241,340 km (0.083 R)
• M50: 20,349,948 km (0.102 R)
• M51: 20,513,159 km (0.068 R)
• M52: 20,731,423 km (0.047 R)
• M53: 21,612,404 km (0.052 R)
• M54: 23,925,337 km (0.067 R)
• M55: 24,270,310 km (0.117 R)
• M56: 24,385,650 km (0.076 R)
• M57: 24,559,183 km (0.085 R)
• M58: 26,850,424 km (0.108 R)
• M59: 28,051,695 km (0.092 R)
• M60: 28,658,913 km (0.066 R)
• M61: 28,903,057 km (0.102 R)
• M62: 29,086,464 km (0.054 R)
• M63: 30,071,865 km (0.104 R)
• M64: 30,319,898 km (0.064 R)
• M65: 30,818,059 km (0.082 R)
• M66: 32,011,850 km (0.068 R)
• M67: 32,328,549 km (0.112 R)
• M68: 32,710,023 km (0.089 R)
• M69: 32,773,752 km (0.099 R)
• M70: 33,156,872 km (0.055 R)
• M71: 33,220,900 km (0.06 R)
• M72: 33,348,956 km (0.088 R)
• M73: 33,798,797 km (0.031 R)
• M74: 34,056,703 km (0.051 R)
• M75: 34,509,536 km (0.109 R)
• M76: 35,945,975 km (0.069 R)
• M77: 36,473,008 km (0.097 R)
• M78: 39,893,264 km (0.085 R)
• M79: 39,961,331 km (0.106 R)
• M80: 40,438,997 km (0.07 R)
• M81: 40,781,427 km (0.113 R)
• M82: 41,744,987 km (0.044 R)
• M83: 42,021,743 km (0.042 R)
• M84: 42,229,684 km (0.096 R)
• M85: 43,204,613 km (0.041 R)
• M86: 43,694,845 km (0.05 R)
• M87: 44,963,884 km (0.118 R)
• M88: 45,745,383 km (0.072 R)
• M89: 47,393,802 km (0.107 R)
• M90: 47,538,015 km (0.067 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: 251 - 20,095 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit