🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 909.1

Radius: 13.4

Gravity: 5.06 G

Time & Orbit

Eccentricity (e): 0.193

Orbit Range: 0.56 AU - 0.82 AU

Year: 389 Days

Day: 9.6 Hours

Environment

Temp: -160 °C

Axial Tilt: 14.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 78,362,474 km

• M1: 167,550 km (0.092 R)
• M2: 264,040 km (0.115 R)
• M3: 349,760 km (0.057 R)
• M4: 498,011 km (0.088 R)
• M5: 619,335 km (0.07 R)
• M6: 756,816 km (0.076 R)
• M7: 857,794 km (0.037 R)
• M8: 1,056,311 km (0.084 R)
• M9: 1,181,225 km (0.116 R)
• M10: 1,265,748 km (0.055 R)
• M11: 1,425,817 km (0.093 R)
• M12: 1,560,007 km (0.114 R)
• M13: 1,659,340 km (0.083 R)
• M14: 1,893,909 km (0.094 R)
• M15: 2,012,540 km (0.079 R)
• M16: 2,201,333 km (0.1 R)
• M17: 2,339,112 km (0.054 R)
• M18: 2,499,182 km (0.104 R)
• M19: 2,584,004 km (0.103 R)
• M20: 2,669,724 km (0.096 R)
• M21: 2,857,768 km (0.105 R)
• M22: 3,289,807 km (0.057 R)
• M23: 3,433,720 km (0.061 R)
• M24: 3,528,415 km (0.048 R)
• M25: 3,646,149 km (0.034 R)
• M26: 3,750,419 km (0.11 R)
• M27: 3,893,434 km (0.115 R)
• M28: 4,153,884 km (0.084 R)
• M29: 4,239,304 km (0.11 R)
• M30: 4,436,026 km (0.11 R)
• M31: 4,555,405 km (0.1 R)
• M32: 4,651,746 km (0.086 R)
• M33: 4,740,607 km (0.046 R)
• M34: 4,830,216 km (0.073 R)
• M35: 4,944,958 km (0.077 R)
• M36: 5,160,379 km (0.077 R)
• M37: 5,396,145 km (0.045 R)
• M38: 5,489,643 km (0.101 R)
• M39: 5,669,759 km (0.065 R)
• M40: 5,851,970 km (0.069 R)
• M41: 5,948,161 km (0.036 R)
• M42: 6,044,801 km (0.062 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 630.9

Radius: 10.4

Gravity: 5.83 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 0.68 AU - 0.74 AU

Year: 406 Days

Day: 14.7 Hours

Environment

Temp: -161 °C

Axial Tilt: 26.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 78,362,474 km

• M1: 130,749 km (0.092 R)
• M2: 200,611 km (0.094 R)
• M3: 274,512 km (0.099 R)
• M4: 378,483 km (0.057 R)
• M5: 486,492 km (0.117 R)
• M6: 578,196 km (0.1 R)
• M7: 688,001 km (0.102 R)
• M8: 805,585 km (0.07 R)
• M9: 1,053,019 km (0.059 R)
• M10: 1,121,086 km (0.098 R)
• M11: 1,186,012 km (0.104 R)
• M12: 1,320,052 km (0.076 R)
• M13: 1,424,022 km (0.097 R)
• M14: 1,494,932 km (0.109 R)
• M15: 1,582,596 km (0.082 R)
• M16: 1,741,918 km (0.109 R)
• M17: 1,917,695 km (0.03 R)
• M18: 2,030,641 km (0.095 R)
• M19: 2,263,266 km (0.084 R)
• M20: 2,328,790 km (0.08 R)
• M21: 2,504,717 km (0.101 R)
• M22: 2,597,468 km (0.09 R)
• M23: 2,786,410 km (0.044 R)
• M24: 2,895,616 km (0.081 R)
• M25: 2,993,154 km (0.112 R)
• M26: 3,091,739 km (0.108 R)
• M27: 3,164,743 km (0.11 R)
• M28: 3,366,999 km (0.095 R)
• M29: 3,469,623 km (0.109 R)
• M30: 3,699,256 km (0.101 R)
• M31: 3,840,925 km (0.083 R)
• M32: 3,933,975 km (0.093 R)
• M33: 4,035,103 km (0.074 R)
• M34: 4,276,854 km (0.114 R)
• M35: 4,365,864 km (0.096 R)
• M36: 4,493,172 km (0.063 R)
• M37: 4,583,679 km (0.047 R)
• M38: 4,705,451 km (0.057 R)
• M39: 4,782,195 km (0.104 R)
• M40: 4,897,984 km (0.08 R)
• M41: 5,022,449 km (0.076 R)
• M42: 5,108,618 km (0.035 R)
• M43: 5,179,677 km (0.077 R)
• M44: 5,330,471 km (0.106 R)
• M45: 5,426,513 km (0.102 R)
• M46: 5,498,919 km (0.07 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.32 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 457.4

Radius: 12

Gravity: 3.18 G

Time & Orbit

Eccentricity (e): 0.135

Orbit Range: 1.14 AU - 1.5 AU

Year: 1029 Days

Day: 13.7 Hours

Environment

Temp: -181 °C

Axial Tilt: 2.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 78,362,474 km

• M1: 149,448 km (0.072 R)
• M2: 272,418 km (0.112 R)
• M3: 377,435 km (0.082 R)
• M4: 457,021 km (0.103 R)
• M5: 544,387 km (0.033 R)
• M6: 628,311 km (0.082 R)
• M7: 722,857 km (0.075 R)
• M8: 845,976 km (0.08 R)
• M9: 934,388 km (0.071 R)
• M10: 1,102,088 km (0.081 R)
• M11: 1,206,507 km (0.085 R)
• M12: 1,362,687 km (0.026 R)
• M13: 1,454,091 km (0.08 R)
• M14: 1,562,251 km (0.115 R)
• M15: 1,673,402 km (0.055 R)
• M16: 1,848,880 km (0.062 R)
• M17: 1,943,127 km (0.055 R)
• M18: 2,111,873 km (0.102 R)
• M19: 2,344,498 km (0.047 R)
• M20: 2,429,769 km (0.112 R)
• M21: 2,673,912 km (0.083 R)
• M22: 3,009,012 km (0.053 R)
• M23: 3,224,283 km (0.031 R)
• M24: 3,319,577 km (0.056 R)
• M25: 3,444,790 km (0.055 R)
• M26: 3,719,751 km (0.116 R)
• M27: 3,839,878 km (0.078 R)
• M28: 3,961,352 km (0.052 R)
• M29: 4,104,666 km (0.118 R)
• M30: 4,312,458 km (0.111 R)
• M31: 4,481,204 km (0.072 R)
• M32: 4,847,270 km (0.1 R)
• M33: 4,934,785 km (0.085 R)
• M34: 5,011,828 km (0.042 R)
• M35: 5,516,721 km (0.101 R)
• M36: 5,596,756 km (0.111 R)
• M37: 5,815,916 km (0.102 R)
• M38: 5,991,096 km (0.113 R)
• M39: 6,191,557 km (0.087 R)
• M40: 6,286,701 km (0.107 R)
• M41: 6,478,485 km (0.089 R)
• M42: 6,599,360 km (0.115 R)
• M43: 6,855,622 km (0.116 R)
• M44: 7,040,824 km (0.117 R)
• M45: 7,152,573 km (0.098 R)
• M46: 7,340,319 km (0.115 R)
• M47: 7,491,712 km (0.061 R)
• M48: 7,593,289 km (0.089 R)
• M49: 7,823,370 km (0.115 R)
• M50: 8,290,415 km (0.054 R)
• M51: 8,421,762 km (0.111 R)
• M52: 8,686,700 km (0.105 R)
• M53: 8,820,141 km (0.11 R)
• M54: 9,021,649 km (0.075 R)
• M55: 9,143,272 km (0.076 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.28 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 28

Radius: 12.6

Gravity: 0.18 G

Time & Orbit

Eccentricity (e): 0.058

Orbit Range: 3.09 AU - 3.47 AU

Year: 4029 Days

Day: 8.8 Hours

Environment

Temp: -218 °C

Axial Tilt: 6.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (32)

Outer Limit: 78,362,474 km

• M1: 161,865 km (0.107 R)
• M2: 246,836 km (0.067 R)
• M3: 334,800 km (0.088 R)
• M4: 419,921 km (0.086 R)
• M5: 686,355 km (0.118 R)
• M6: 832,662 km (0.112 R)
• M7: 960,269 km (0.11 R)
• M8: 1,045,240 km (0.104 R)
• M9: 1,223,411 km (0.104 R)
• M10: 1,357,301 km (0.065 R)
• M11: 1,538,913 km (0.116 R)
• M12: 1,743,862 km (0.088 R)
• M13: 2,020,768 km (0.114 R)
• M14: 2,164,831 km (0.076 R)
• M15: 2,454,751 km (0.113 R)
• M16: 2,626,191 km (0.095 R)
• M17: 3,063,316 km (0.119 R)
• M18: 3,698,059 km (0.085 R)
• M19: 3,945,345 km (0.114 R)
• M20: 4,198,315 km (0.026 R)
• M21: 4,342,228 km (0.09 R)
• M22: 5,152,450 km (0.079 R)
• M23: 5,340,046 km (0.113 R)
• M24: 5,654,201 km (0.119 R)
• M25: 6,159,992 km (0.088 R)
• M26: 6,418,497 km (0.119 R)
• M27: 6,958,246 km (0.114 R)
• M28: 7,178,304 km (0.054 R)
• M29: 7,612,886 km (0.089 R)
• M30: 7,903,106 km (0.086 R)
• M31: 8,107,157 km (0.108 R)
• M32: 8,914,388 km (0.098 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 333.4

Radius: 8.3

Gravity: 4.84 G

Time & Orbit

Eccentricity (e): 0.14

Orbit Range: 3.52 AU - 4.66 AU

Year: 5610 Days

Day: 12 Hours

Environment

Temp: -212 °C

Axial Tilt: 48.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 78,362,474 km

• M1: 132,693 km (0.078 R)
• M2: 235,916 km (0.06 R)
• M3: 323,131 km (0.103 R)
• M4: 450,888 km (0.114 R)
• M5: 670,348 km (0.102 R)
• M6: 923,168 km (0.069 R)
• M7: 997,219 km (0.115 R)
• M8: 1,245,701 km (0.117 R)
• M9: 1,300,604 km (0.118 R)
• M10: 1,528,292 km (0.113 R)
• M11: 1,587,233 km (0.064 R)
• M12: 1,646,923 km (0.088 R)
• M13: 1,846,487 km (0.092 R)
• M14: 2,070,285 km (0.06 R)
• M15: 2,202,081 km (0.119 R)
• M16: 2,285,855 km (0.119 R)
• M17: 2,456,846 km (0.092 R)
• M18: 2,829,494 km (0.09 R)
• M19: 3,125,399 km (0.059 R)
• M20: 3,238,943 km (0.089 R)
• M21: 3,470,222 km (0.1 R)
• M22: 3,627,449 km (0.067 R)
• M23: 4,092,399 km (0.036 R)
• M24: 4,448,293 km (0.119 R)
• M25: 4,814,209 km (0.091 R)
• M26: 5,145,120 km (0.068 R)
• M27: 5,324,637 km (0.065 R)
• M28: 5,945,767 km (0.085 R)
• M29: 6,229,106 km (0.115 R)
• M30: 6,711,409 km (0.106 R)
• M31: 6,907,682 km (0.116 R)
• M32: 7,130,732 km (0.11 R)
• M33: 7,280,779 km (0.099 R)
• M34: 7,584,014 km (0.106 R)
• M35: 7,839,976 km (0.086 R)
• M36: 8,597,988 km (0.096 R)
• M37: 8,784,537 km (0.102 R)
• M38: 8,864,871 km (0.081 R)
• M39: 9,134,446 km (0.11 R)
• M40: 9,406,714 km (0.11 R)
• M41: 9,626,473 km (0.1 R)
• M42: 9,959,329 km (0.068 R)
• M43: 10,155,152 km (0.113 R)
• M44: 10,267,799 km (0.066 R)
• M45: 10,951,611 km (0.08 R)
• M46: 11,240,784 km (0.096 R)
• M47: 12,123,711 km (0.059 R)
• M48: 12,694,427 km (0.065 R)
• M49: 13,151,149 km (0.088 R)
• M50: 13,706,307 km (0.086 R)
• M51: 14,080,750 km (0.087 R)
• M52: 14,206,263 km (0.113 R)
• M53: 14,269,243 km (0.106 R)
• M54: 14,363,789 km (0.104 R)
• M55: 15,385,243 km (0.046 R)
• M56: 15,482,183 km (0.085 R)
• M57: 15,546,809 km (0.095 R)
• M58: 17,295,459 km (0.118 R)
• M59: 17,632,353 km (0.099 R)
• M60: 18,073,517 km (0.046 R)
• M61: 18,175,842 km (0.111 R)
• M62: 18,449,756 km (0.051 R)
• M63: 18,793,980 km (0.083 R)
• M64: 19,070,737 km (0.101 R)
• M65: 19,663,743 km (0.114 R)
• M66: 20,015,298 km (0.113 R)
• M67: 20,404,402 km (0.114 R)
• M68: 21,586,823 km (0.069 R)
• M69: 21,840,541 km (0.048 R)
• M70: 21,913,246 km (0.104 R)
• M71: 21,985,950 km (0.066 R)
• M72: 22,570,728 km (0.118 R)
• M73: 24,130,137 km (0.113 R)
• M74: 24,468,826 km (0.052 R)
• M75: 24,695,467 km (0.119 R)
• M76: 24,960,704 km (0.051 R)
• M77: 25,379,578 km (0.079 R)

Asteroid Belt

Center: 4.84 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 6 - Gas Giant

Semi-Major Axis: 5.58 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 197.2

Radius: 10.2

Gravity: 1.9 G

Time & Orbit

Eccentricity (e): 0.226

Orbit Range: 4.32 AU - 6.84 AU

Year: 8940 Days

Day: 9.1 Hours

Environment

Temp: -223 °C

Axial Tilt: 44.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 78,362,474 km

• M1: 140,472 km (0.085 R)
• M2: 318,344 km (0.068 R)
• M3: 453,880 km (0.104 R)
• M4: 645,365 km (0.107 R)
• M5: 838,795 km (0.101 R)
• M6: 969,693 km (0.105 R)
• M7: 1,079,498 km (0.077 R)
• M8: 1,237,773 km (0.068 R)
• M9: 1,327,382 km (0.095 R)
• M10: 1,466,059 km (0.112 R)
• M11: 1,825,842 km (0.093 R)
• M12: 1,963,622 km (0.095 R)
• M13: 2,267,754 km (0.081 R)
• M14: 2,454,003 km (0.071 R)
• M15: 2,645,190 km (0.086 R)
• M16: 2,722,980 km (0.11 R)
• M17: 2,861,209 km (0.106 R)
• M18: 3,185,836 km (0.085 R)
• M19: 3,565,366 km (0.055 R)
• M20: 3,760,591 km (0.083 R)
• M21: 4,048,866 km (0.114 R)
• M22: 4,252,619 km (0.11 R)
• M23: 4,436,624 km (0.113 R)
• M24: 5,223,509 km (0.075 R)
• M25: 5,746,653 km (0.109 R)
• M26: 6,156,551 km (0.102 R)
• M27: 6,260,521 km (0.1 R)
• M28: 6,443,779 km (0.11 R)
• M29: 7,497,696 km (0.114 R)
• M30: 8,087,111 km (0.102 R)
• M31: 8,229,678 km (0.105 R)
• M32: 8,344,420 km (0.116 R)
• M33: 8,459,610 km (0.106 R)
• M34: 9,250,983 km (0.104 R)
• M35: 9,791,779 km (0.083 R)
• M36: 10,778,377 km (0.098 R)
• M37: 10,872,474 km (0.115 R)
• M38: 10,966,870 km (0.065 R)
• M39: 11,124,846 km (0.035 R)
• M40: 11,283,419 km (0.099 R)
• M41: 11,990,718 km (0.086 R)
• M42: 12,613,045 km (0.095 R)
• M43: 12,944,853 km (0.079 R)
• M44: 13,650,806 km (0.068 R)
• M45: 14,128,621 km (0.063 R)
• M46: 14,404,031 km (0.068 R)
• M47: 14,855,368 km (0.083 R)
• M48: 15,100,409 km (0.048 R)
• M49: 15,205,726 km (0.087 R)
• M50: 15,807,708 km (0.096 R)
• M51: 16,561,980 km (0.103 R)
• M52: 16,779,795 km (0.075 R)
• M53: 18,367,477 km (0.068 R)
• M54: 18,743,566 km (0.08 R)
• M55: 19,312,487 km (0.093 R)
• M56: 19,579,818 km (0.114 R)
• M57: 19,771,603 km (0.085 R)
• M58: 19,925,539 km (0.034 R)
• M59: 20,234,458 km (0.045 R)
• M60: 20,311,950 km (0.066 R)
• M61: 20,428,337 km (0.052 R)
• M62: 20,545,024 km (0.078 R)
• M63: 22,201,072 km (0.029 R)
• M64: 22,883,537 km (0.071 R)
• M65: 23,328,890 km (0.102 R)
• M66: 23,899,756 km (0.116 R)
• M67: 24,063,715 km (0.038 R)
• M68: 24,310,252 km (0.11 R)
• M69: 24,557,837 km (0.111 R)
• M70: 25,975,875 km (0.102 R)
• M71: 26,482,713 km (0.089 R)
• M72: 26,652,357 km (0.076 R)
• M73: 26,992,841 km (0.072 R)
• M74: 27,206,318 km (0.065 R)
• M75: 27,979,589 km (0.043 R)
• M76: 28,847,257 km (0.085 R)
• M77: 29,328,214 km (0.104 R)

Planet 7 - Ice Giant

Semi-Major Axis: 8.79 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 958

Radius: 4.9

Gravity: 39.9 G

Time & Orbit

Eccentricity (e): 0.245

Orbit Range: 6.64 AU - 10.94 AU

Year: 17676 Days

Day: 18.4 Hours

Environment

Temp: -229 °C

Axial Tilt: 143.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 78,362,474 km

• M1: 176,974 km (0.064 R)
• M2: 427,850 km (0.107 R)
• M3: 488,287 km (0.112 R)
• M4: 962,812 km (0.081 R)
• M5: 1,183,020 km (0.068 R)
• M6: 1,358,498 km (0.06 R)
• M7: 3,438,657 km (0.103 R)
• M8: 3,688,784 km (0.09 R)
• M9: 3,816,092 km (0.101 R)
• M10: 4,206,692 km (0.075 R)
• M11: 4,429,144 km (0.066 R)
• M12: 4,609,858 km (0.104 R)
• M13: 4,701,113 km (0.052 R)
• M14: 4,839,192 km (0.086 R)
• M15: 4,885,418 km (0.072 R)
• M16: 5,356,801 km (0.07 R)
• M17: 5,793,178 km (0.059 R)
• M18: 6,291,488 km (0.065 R)
• M19: 6,545,804 km (0.052 R)
• M20: 7,275,543 km (0.076 R)
• M21: 8,362,222 km (0.082 R)
• M22: 8,867,414 km (0.026 R)
• M23: 9,848,626 km (0.114 R)
• M24: 10,143,783 km (0.09 R)
• M25: 10,322,103 km (0.076 R)
• M26: 10,742,623 km (0.087 R)
• M27: 12,226,036 km (0.045 R)
• M28: 12,734,668 km (0.12 R)
• M29: 14,501,569 km (0.083 R)
• M30: 16,483,142 km (0.095 R)
• M31: 16,974,122 km (0.112 R)
• M32: 18,330,526 km (0.089 R)
• M33: 18,620,597 km (0.115 R)
• M34: 20,018,589 km (0.116 R)
• M35: 22,603,341 km (0.103 R)
• M36: 23,148,326 km (0.033 R)
• M37: 23,226,565 km (0.046 R)
• M38: 24,490,069 km (0.063 R)
• M39: 25,452,133 km (0.067 R)
• M40: 26,754,083 km (0.079 R)
• M41: 27,330,484 km (0.062 R)
• M42: 27,744,720 km (0.036 R)
• M43: 28,244,527 km (0.08 R)
• M44: 28,328,152 km (0.115 R)
• M45: 29,506,983 km (0.065 R)
• M46: 29,676,627 km (0.091 R)
• M47: 31,912,367 km (0.059 R)
• M48: 32,086,499 km (0.074 R)
• M49: 32,261,080 km (0.088 R)
• M50: 34,469,145 km (0.062 R)
• M51: 35,096,109 km (0.109 R)
• M52: 37,365,808 km (0.113 R)
• M53: 38,657,436 km (0.082 R)
• M54: 39,029,037 km (0.084 R)
• M55: 39,308,636 km (0.094 R)
• M56: 41,664,054 km (0.103 R)
• M57: 42,140,673 km (0.061 R)
• M58: 42,906,913 km (0.074 R)
• M59: 43,967,861 km (0.08 R)
• M60: 44,064,801 km (0.101 R)
• M61: 46,608,713 km (0.092 R)
• M62: 47,898,545 km (0.065 R)
• M63: 48,497,685 km (0.068 R)
• M64: 48,597,766 km (0.116 R)
• M65: 52,042,257 km (0.099 R)
• M66: 54,937,424 km (0.066 R)
• M67: 56,509,698 km (0.113 R)
• M68: 56,720,481 km (0.104 R)
• M69: 56,931,414 km (0.074 R)
• M70: 57,037,031 km (0.092 R)
• M71: 57,672,074 km (0.075 R)
• M72: 60,235,583 km (0.095 R)
• M73: 60,774,285 km (0.117 R)
• M74: 65,141,046 km (0.117 R)
• M75: 65,251,599 km (0.113 R)
• M76: 66,137,518 km (0.11 R)
• M77: 67,362,126 km (0.117 R)
• M78: 68,819,060 km (0.042 R)
• M79: 70,399,711 km (0.075 R)
• M80: 70,513,106 km (0.107 R)
• M81: 70,626,501 km (0.077 R)
• M82: 71,308,219 km (0.102 R)
• M83: 71,764,043 km (0.107 R)
• M84: 72,335,058 km (0.098 R)
• M85: 72,449,501 km (0.155 R)
• M86: 74,057,229 km (0.074 R)
• M87: 75,444,600 km (0.064 R)
• M88: 75,676,626 km (0.11 R)
• M89: 76,257,814 km (0.084 R)
• M90: 76,957,333 km (0.219 R)
• M91: 77,074,020 km (0.106 R)
• M92: 77,190,856 km (0.065 R)
• M93: 77,307,841 km (0.034 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: 208 - 15,948 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit