Star System Generated (Seed: 1766640885)

Star Details

Spectral Class: M8V

Temperature: 2,617 K

Mass: 0.28 sol

Luminosity: 0.01 lux

Habitable Zone (HZ)

Inner Boundary: 0.1 AU

Outer Boundary: 0.14 AU

Physical Limits

Snow Line: 0.48 AU

Max System Radius: 10.6 AU

Planetary System (6 Planets)

Planet 1 - Gas Giant

Semi-Major Axis: 0.76 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 370.3

Radius: 8.1

Gravity: 5.64 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 0.6 AU - 0.92 AU

Year: 457 Days

Day: 7.3 Hours

Environment

Temp: -164 °C

Axial Tilt: 4.5 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (47)

Outer Limit: 68,597,422 km

  • M1: 108,010 km (0.079 R)
  • M2: 170,841 km (0.06 R)
  • M3: 224,098 km (0.101 R)
  • M4: 316,998 km (0.112 R)
  • M5: 405,111 km (0.115 R)
  • M6: 477,516 km (0.109 R)
  • M7: 619,485 km (0.095 R)
  • M8: 690,394 km (0.058 R)
  • M9: 760,705 km (0.065 R)
  • M10: 825,631 km (0.11 R)
  • M11: 880,683 km (0.06 R)
  • M12: 965,804 km (0.092 R)
  • M13: 1,023,997 km (0.107 R)
  • M14: 1,122,582 km (0.105 R)
  • M15: 1,233,285 km (0.089 R)
  • M16: 1,446,761 km (0.043 R)
  • M17: 1,707,510 km (0.074 R)
  • M18: 1,794,426 km (0.108 R)
  • M19: 1,898,547 km (0.116 R)
  • M20: 2,042,310 km (0.045 R)
  • M21: 2,223,024 km (0.078 R)
  • M22: 2,278,824 km (0.107 R)
  • M23: 2,329,388 km (0.115 R)
  • M24: 2,443,232 km (0.052 R)
  • M25: 2,706,375 km (0.084 R)
  • M26: 2,862,555 km (0.091 R)
  • M27: 2,929,575 km (0.032 R)
  • M28: 3,003,177 km (0.119 R)
  • M29: 3,133,627 km (0.038 R)
  • M30: 3,190,175 km (0.027 R)
  • M31: 3,253,305 km (0.109 R)
  • M32: 3,310,601 km (0.09 R)
  • M33: 3,438,956 km (0.115 R)
  • M34: 3,529,762 km (0.092 R)
  • M35: 3,687,438 km (0.028 R)
  • M36: 3,760,442 km (0.069 R)
  • M37: 3,840,776 km (0.084 R)
  • M38: 3,921,559 km (0.1 R)
  • M39: 4,050,662 km (0.099 R)
  • M40: 4,112,296 km (0.102 R)
  • M41: 4,174,229 km (0.116 R)
  • M42: 4,467,740 km (0.09 R)
  • M43: 4,559,893 km (0.108 R)
  • M44: 4,674,185 km (0.094 R)
  • M45: 4,731,781 km (0.07 R)
  • M46: 4,847,569 km (0.099 R)
  • M47: 4,898,433 km (0.107 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 562.8

Radius: 8.6

Gravity: 7.61 G

Time & Orbit

Eccentricity (e): 0.113

Orbit Range: 0.9 AU - 1.14 AU

Year: 711 Days

Day: 14 Hours

Environment

Temp: -185 °C

Axial Tilt: 31.6 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (55)

Outer Limit: 68,597,422 km

  • M1: 108,159 km (0.105 R)
  • M2: 172,337 km (0.093 R)
  • M3: 229,932 km (0.099 R)
  • M4: 315,502 km (0.103 R)
  • M5: 446,849 km (0.091 R)
  • M6: 658,530 km (0.039 R)
  • M7: 786,586 km (0.095 R)
  • M8: 859,141 km (0.071 R)
  • M9: 994,826 km (0.082 R)
  • M10: 1,114,355 km (0.098 R)
  • M11: 1,318,256 km (0.083 R)
  • M12: 1,393,205 km (0.085 R)
  • M13: 1,521,261 km (0.064 R)
  • M14: 1,586,785 km (0.103 R)
  • M15: 1,714,092 km (0.063 R)
  • M16: 1,886,878 km (0.106 R)
  • M17: 2,000,423 km (0.058 R)
  • M18: 2,065,348 km (0.045 R)
  • M19: 2,123,691 km (0.114 R)
  • M20: 2,242,023 km (0.106 R)
  • M21: 2,485,269 km (0.062 R)
  • M22: 2,555,281 km (0.12 R)
  • M23: 2,761,277 km (0.068 R)
  • M24: 2,825,754 km (0.06 R)
  • M25: 2,931,520 km (0.051 R)
  • M26: 3,022,176 km (0.057 R)
  • M27: 3,105,353 km (0.115 R)
  • M28: 3,325,411 km (0.066 R)
  • M29: 3,402,753 km (0.073 R)
  • M30: 3,489,370 km (0.11 R)
  • M31: 3,933,676 km (0.107 R)
  • M32: 4,006,530 km (0.109 R)
  • M33: 4,134,885 km (0.097 R)
  • M34: 4,218,211 km (0.079 R)
  • M35: 4,274,161 km (0.08 R)
  • M36: 4,367,659 km (0.101 R)
  • M37: 4,604,772 km (0.116 R)
  • M38: 4,787,880 km (0.045 R)
  • M39: 4,894,992 km (0.075 R)
  • M40: 5,052,219 km (0.097 R)
  • M41: 5,211,092 km (0.112 R)
  • M42: 5,331,219 km (0.115 R)
  • M43: 5,533,775 km (0.068 R)
  • M44: 5,780,163 km (0.092 R)
  • M45: 5,925,422 km (0.075 R)
  • M46: 6,082,649 km (0.036 R)
  • M47: 6,508,255 km (0.088 R)
  • M48: 6,573,031 km (0.1 R)
  • M49: 6,659,648 km (0.039 R)
  • M50: 6,877,762 km (0.083 R)
  • M51: 7,020,927 km (0.109 R)
  • M52: 7,087,199 km (0.066 R)
  • M53: 7,354,830 km (0.058 R)
  • M54: 7,603,013 km (0.075 R)
  • M55: 7,671,229 km (0.109 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 441.1

Radius: 9.8

Gravity: 4.59 G

Time & Orbit

Eccentricity (e): 0.236

Orbit Range: 0.88 AU - 1.42 AU

Year: 851 Days

Day: 7.8 Hours

Environment

Temp: -190 °C

Axial Tilt: 31.3 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (57)

Outer Limit: 68,597,422 km

  • M1: 129,701 km (0.036 R)
  • M2: 197,170 km (0.029 R)
  • M3: 258,655 km (0.037 R)
  • M4: 429,495 km (0.072 R)
  • M5: 513,121 km (0.111 R)
  • M6: 612,603 km (0.108 R)
  • M7: 724,203 km (0.113 R)
  • M8: 806,333 km (0.071 R)
  • M9: 969,394 km (0.115 R)
  • M10: 1,090,120 km (0.073 R)
  • M11: 1,309,430 km (0.1 R)
  • M12: 1,398,590 km (0.116 R)
  • M13: 1,476,681 km (0.086 R)
  • M14: 1,556,416 km (0.084 R)
  • M15: 1,699,432 km (0.061 R)
  • M16: 1,804,450 km (0.117 R)
  • M17: 1,962,275 km (0.086 R)
  • M18: 2,094,969 km (0.026 R)
  • M19: 2,200,285 km (0.117 R)
  • M20: 2,276,580 km (0.118 R)
  • M21: 2,447,720 km (0.104 R)
  • M22: 2,511,000 km (0.107 R)
  • M23: 2,794,339 km (0.104 R)
  • M24: 3,045,663 km (0.064 R)
  • M25: 3,113,880 km (0.07 R)
  • M26: 3,400,958 km (0.063 R)
  • M27: 3,525,274 km (0.054 R)
  • M28: 3,588,105 km (0.098 R)
  • M29: 3,651,235 km (0.067 R)
  • M30: 3,778,693 km (0.117 R)
  • M31: 3,926,196 km (0.119 R)
  • M32: 4,028,671 km (0.091 R)
  • M33: 4,094,344 km (0.107 R)
  • M34: 4,409,098 km (0.066 R)
  • M35: 4,672,390 km (0.116 R)
  • M36: 4,761,401 km (0.081 R)
  • M37: 4,830,964 km (0.113 R)
  • M38: 5,031,575 km (0.108 R)
  • M39: 5,235,028 km (0.049 R)
  • M40: 5,410,057 km (0.114 R)
  • M41: 5,607,975 km (0.115 R)
  • M42: 5,819,058 km (0.098 R)
  • M43: 6,000,371 km (0.058 R)
  • M44: 6,162,086 km (0.104 R)
  • M45: 6,270,694 km (0.118 R)
  • M46: 6,434,653 km (0.096 R)
  • M47: 6,500,775 km (0.12 R)
  • M48: 6,644,539 km (0.09 R)
  • M49: 6,711,260 km (0.116 R)
  • M50: 6,811,789 km (0.109 R)
  • M51: 6,991,905 km (0.065 R)
  • M52: 7,161,998 km (0.106 R)
  • M53: 7,345,106 km (0.037 R)
  • M54: 7,576,085 km (0.114 R)
  • M55: 7,704,141 km (0.115 R)
  • M56: 7,891,736 km (0.111 R)
  • M57: 7,986,133 km (0.054 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 886.6

Radius: 10.4

Gravity: 8.2 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 1.57 AU - 2.45 AU

Year: 1967 Days

Day: 5.1 Hours

Environment

Temp: -203 °C

Axial Tilt: 37.4 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (74)

Outer Limit: 68,597,422 km

  • M1: 171,738 km (0.098 R)
  • M2: 269,575 km (0.088 R)
  • M3: 361,728 km (0.052 R)
  • M4: 447,148 km (0.096 R)
  • M5: 610,808 km (0.074 R)
  • M6: 692,339 km (0.03 R)
  • M7: 831,166 km (0.076 R)
  • M8: 999,314 km (0.057 R)
  • M9: 1,107,772 km (0.106 R)
  • M10: 1,294,171 km (0.098 R)
  • M11: 1,424,321 km (0.103 R)
  • M12: 1,491,042 km (0.113 R)
  • M13: 1,558,959 km (0.085 R)
  • M14: 1,674,599 km (0.047 R)
  • M15: 1,769,144 km (0.061 R)
  • M16: 1,902,287 km (0.105 R)
  • M17: 2,038,720 km (0.075 R)
  • M18: 2,401,046 km (0.062 R)
  • M19: 2,562,612 km (0.084 R)
  • M20: 2,783,717 km (0.084 R)
  • M21: 3,040,128 km (0.1 R)
  • M22: 3,156,515 km (0.104 R)
  • M23: 3,289,208 km (0.113 R)
  • M24: 3,423,996 km (0.099 R)
  • M25: 4,351,652 km (0.061 R)
  • M26: 4,818,099 km (0.057 R)
  • M27: 5,195,833 km (0.106 R)
  • M28: 6,163,432 km (0.039 R)
  • M29: 6,292,984 km (0.076 R)
  • M30: 6,535,931 km (0.114 R)
  • M31: 6,781,870 km (0.047 R)
  • M32: 6,858,165 km (0.076 R)
  • M33: 7,011,652 km (0.104 R)
  • M34: 7,088,845 km (0.116 R)
  • M35: 7,263,575 km (0.104 R)
  • M36: 7,341,665 km (0.107 R)
  • M37: 7,676,914 km (0.083 R)
  • M38: 7,876,328 km (0.098 R)
  • M39: 8,158,469 km (0.046 R)
  • M40: 8,403,062 km (0.048 R)
  • M41: 8,691,487 km (0.091 R)
  • M42: 9,130,108 km (0.111 R)
  • M43: 9,405,218 km (0.108 R)
  • M44: 9,790,881 km (0.052 R)
  • M45: 9,877,199 km (0.086 R)
  • M46: 10,247,305 km (0.1 R)
  • M47: 10,378,951 km (0.064 R)
  • M48: 10,844,350 km (0.067 R)
  • M49: 10,911,369 km (0.052 R)
  • M50: 11,339,070 km (0.086 R)
  • M51: 11,543,720 km (0.029 R)
  • M52: 11,680,751 km (0.099 R)
  • M53: 11,749,566 km (0.05 R)
  • M54: 11,956,460 km (0.037 R)
  • M55: 12,327,613 km (0.078 R)
  • M56: 12,561,434 km (0.116 R)
  • M57: 12,631,745 km (0.069 R)
  • M58: 12,867,511 km (0.07 R)
  • M59: 12,985,993 km (0.058 R)
  • M60: 14,019,415 km (0.097 R)
  • M61: 14,214,490 km (0.097 R)
  • M62: 14,533,583 km (0.039 R)
  • M63: 14,780,718 km (0.112 R)
  • M64: 15,329,144 km (0.071 R)
  • M65: 15,530,204 km (0.111 R)
  • M66: 15,681,597 km (0.097 R)
  • M67: 16,011,311 km (0.118 R)
  • M68: 16,240,943 km (0.075 R)
  • M69: 16,471,623 km (0.107 R)
  • M70: 16,677,619 km (0.092 R)
  • M71: 16,780,992 km (0.095 R)
  • M72: 16,884,513 km (0.098 R)
  • M73: 16,988,334 km (0.106 R)
  • M74: 17,170,395 km (0.102 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.51 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 52.6

Radius: 3.3

Gravity: 4.83 G

Time & Orbit

Eccentricity (e): 0.164

Orbit Range: 6.28 AU - 8.74 AU

Year: 14206 Days

Day: 24.4 Hours

Environment

Temp: -237 °C

Axial Tilt: 11.4 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (78)

Outer Limit: 68,597,422 km

  • M1: 108,309 km (0.054 R)
  • M2: 130,749 km (0.091 R)
  • M3: 202,256 km (0.093 R)
  • M4: 328,367 km (0.071 R)
  • M5: 517,160 km (0.119 R)
  • M6: 579,542 km (0.089 R)
  • M7: 853,905 km (0.11 R)
  • M8: 1,096,253 km (0.073 R)
  • M9: 1,301,950 km (0.116 R)
  • M10: 1,748,201 km (0.105 R)
  • M11: 1,811,032 km (0.106 R)
  • M12: 2,220,481 km (0.06 R)
  • M13: 2,271,494 km (0.101 R)
  • M14: 2,374,717 km (0.115 R)
  • M15: 2,621,553 km (0.112 R)
  • M16: 2,729,712 km (0.061 R)
  • M17: 3,292,799 km (0.12 R)
  • M18: 3,587,357 km (0.067 R)
  • M19: 3,647,346 km (0.105 R)
  • M20: 3,869,947 km (0.041 R)
  • M21: 4,034,655 km (0.118 R)
  • M22: 4,138,775 km (0.091 R)
  • M23: 4,180,662 km (0.117 R)
  • M24: 4,370,801 km (0.097 R)
  • M25: 4,607,166 km (0.116 R)
  • M26: 4,650,549 km (0.053 R)
  • M27: 4,803,588 km (0.076 R)
  • M28: 4,958,272 km (0.098 R)
  • M29: 5,025,142 km (0.098 R)
  • M30: 5,204,809 km (0.029 R)
  • M31: 5,593,315 km (0.11 R)
  • M32: 6,133,812 km (0.085 R)
  • M33: 6,471,005 km (0.115 R)
  • M34: 6,544,009 km (0.108 R)
  • M35: 6,592,778 km (0.105 R)
  • M36: 7,137,913 km (0.053 R)
  • M37: 7,188,178 km (0.11 R)
  • M38: 7,517,891 km (0.077 R)
  • M39: 7,723,140 km (0.116 R)
  • M40: 7,930,333 km (0.114 R)
  • M41: 8,008,423 km (0.036 R)
  • M42: 8,060,782 km (0.119 R)
  • M43: 8,323,626 km (0.096 R)
  • M44: 8,562,683 km (0.059 R)
  • M45: 9,101,983 km (0.073 R)
  • M46: 9,265,793 km (0.107 R)
  • M47: 9,348,221 km (0.036 R)
  • M48: 9,403,124 km (0.106 R)
  • M49: 9,568,878 km (0.089 R)
  • M50: 10,383,289 km (0.119 R)
  • M51: 11,365,997 km (0.07 R)
  • M52: 11,868,497 km (0.114 R)
  • M53: 12,559,639 km (0.081 R)
  • M54: 13,325,580 km (0.044 R)
  • M55: 13,917,838 km (0.116 R)
  • M56: 14,646,230 km (0.074 R)
  • M57: 15,451,814 km (0.088 R)
  • M58: 15,484,277 km (0.071 R)
  • M59: 15,942,047 km (0.099 R)
  • M60: 15,974,958 km (0.036 R)
  • M61: 16,304,822 km (0.102 R)
  • M62: 16,503,787 km (0.116 R)
  • M63: 16,570,358 km (0.072 R)
  • M64: 17,004,790 km (0.115 R)
  • M65: 19,093,326 km (0.057 R)
  • M66: 19,233,050 km (0.111 R)
  • M67: 19,583,857 km (0.056 R)
  • M68: 20,577,486 km (0.059 R)
  • M69: 21,660,126 km (0.087 R)
  • M70: 21,988,493 km (0.067 R)
  • M71: 22,208,253 km (0.073 R)
  • M72: 22,798,117 km (0.075 R)
  • M73: 23,169,269 km (0.115 R)
  • M74: 24,068,502 km (0.064 R)
  • M75: 24,181,598 km (0.083 R)
  • M76: 24,522,233 km (0.12 R)
  • M77: 24,864,512 km (0.066 R)
  • M78: 25,707,646 km (0.092 R)

Planet 6 - Ice Giant

Semi-Major Axis: 9.79 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 449.1

Radius: 3.3

Gravity: 41.24 G

Time & Orbit

Eccentricity (e): 0.181

Orbit Range: 8.02 AU - 11.56 AU

Year: 21144 Days

Day: 15.2 Hours

Environment

Temp: -232 °C

Axial Tilt: 21.8 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (96)

Outer Limit: 68,597,422 km

  • M1: 166,951 km (0.096 R)
  • M2: 433,535 km (0.08 R)
  • M3: 470,784 km (0.085 R)
  • M4: 528,978 km (0.044 R)
  • M5: 695,481 km (0.073 R)
  • M6: 925,263 km (0.097 R)
  • M7: 1,650,813 km (0.052 R)
  • M8: 1,680,433 km (0.117 R)
  • M9: 2,080,158 km (0.101 R)
  • M10: 2,373,520 km (0.101 R)
  • M11: 2,714,603 km (0.117 R)
  • M12: 2,926,583 km (0.095 R)
  • M13: 3,107,297 km (0.082 R)
  • M14: 3,944,447 km (0.094 R)
  • M15: 4,103,769 km (0.119 R)
  • M16: 4,305,876 km (0.079 R)
  • M17: 4,677,776 km (0.103 R)
  • M18: 5,102,933 km (0.069 R)
  • M19: 5,363,981 km (0.119 R)
  • M20: 6,875,518 km (0.111 R)
  • M21: 6,923,240 km (0.113 R)
  • M22: 6,971,111 km (0.1 R)
  • M23: 7,751,563 km (0.115 R)
  • M24: 8,765,238 km (0.097 R)
  • M25: 9,659,235 km (0.092 R)
  • M26: 10,198,536 km (0.098 R)
  • M27: 10,858,412 km (0.079 R)
  • M28: 11,306,009 km (0.084 R)
  • M29: 11,362,407 km (0.108 R)
  • M30: 12,334,943 km (0.099 R)
  • M31: 13,214,878 km (0.105 R)
  • M32: 13,692,544 km (0.097 R)
  • M33: 13,873,108 km (0.107 R)
  • M34: 14,419,440 km (0.116 R)
  • M35: 14,541,811 km (0.105 R)
  • M36: 15,407,982 km (0.065 R)
  • M37: 16,290,759 km (0.091 R)
  • M38: 16,545,973 km (0.117 R)
  • M39: 17,189,843 km (0.096 R)
  • M40: 17,841,790 km (0.079 R)
  • M41: 18,038,960 km (0.071 R)
  • M42: 21,360,033 km (0.118 R)
  • M43: 22,272,131 km (0.084 R)
  • M44: 22,342,891 km (0.12 R)
  • M45: 23,125,288 km (0.079 R)
  • M46: 23,196,945 km (0.12 R)
  • M47: 23,340,260 km (0.088 R)
  • M48: 23,412,067 km (0.119 R)
  • M49: 23,916,660 km (0.086 R)
  • M50: 24,206,731 km (0.055 R)
  • M51: 25,083,673 km (0.094 R)
  • M52: 25,304,480 km (0.101 R)
  • M53: 26,194,288 km (0.092 R)
  • M54: 26,643,082 km (0.1 R)
  • M55: 26,793,278 km (0.074 R)
  • M56: 27,321,059 km (0.109 R)
  • M57: 28,157,162 km (0.11 R)
  • M58: 29,621,276 km (0.075 R)
  • M59: 31,743,920 km (0.067 R)
  • M60: 32,062,564 km (0.117 R)
  • M61: 32,622,808 km (0.085 R)
  • M62: 33,833,952 km (0.09 R)
  • M63: 34,404,070 km (0.096 R)
  • M64: 35,389,022 km (0.044 R)
  • M65: 35,719,334 km (0.05 R)
  • M66: 35,802,062 km (0.055 R)
  • M67: 38,738,219 km (0.061 R)
  • M68: 39,163,825 km (0.107 R)
  • M69: 41,141,958 km (0.118 R)
  • M70: 41,837,737 km (0.043 R)
  • M71: 42,361,928 km (0.106 R)
  • M72: 43,947,815 km (0.091 R)
  • M73: 45,373,633 km (0.078 R)
  • M74: 47,631,663 km (0.096 R)
  • M75: 47,722,768 km (0.113 R)
  • M76: 47,996,382 km (0.114 R)
  • M77: 48,636,811 km (0.107 R)
  • M78: 49,464,386 km (0.082 R)
  • M79: 52,444,226 km (0.116 R)
  • M80: 53,103,803 km (0.079 R)
  • M81: 54,050,758 km (0.097 R)
  • M82: 55,769,189 km (0.085 R)
  • M83: 57,602,660 km (0.04 R)
  • M84: 59,553,716 km (0.119 R)
  • M85: 59,848,274 km (0.094 R)
  • M86: 60,340,301 km (0.088 R)
  • M87: 61,625,646 km (0.04 R)
  • M88: 62,720,403 km (0.076 R)
  • M89: 63,620,833 km (0.088 R)
  • M90: 65,434,408 km (0.082 R)
  • M91: 66,551,006 km (0.101 R)
  • M92: 66,652,882 km (0.086 R)
  • M93: 67,060,686 km (0.034 R)
  • M94: 67,469,388 km (0.086 R)
  • M95: 67,878,837 km (0.1 R)
  • M96: 68,186,560 km (0.057 R)

Kuiper Belt

Range: 30 - 52 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 321 - 11,088 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit