G3V Star System Generated (Seed: 1768414352)

Star Details

Spectral Class: G7V

Temperature: 5,440 K

Mass: 0.96 sol

Luminosity: 0.87 lux

Habitable Zone (HZ)

Inner Boundary: 0.89 AU

Outer Boundary: 1.28 AU

Physical Limits

Snow Line: 4.48 AU

Max System Radius: 19.6 AU

Planetary System (10 Planets)

Planet 1 - Terrestrial

Semi-Major Axis: 0.93 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.28

Radius: 1.1

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.001

Orbit Range: 0.93 AU - 0.93 AU

Year: 334 Days

Day: 19.4 Hours

Environment

Temp: 38 °C

Axial Tilt: 34.7 °

Atmosphere: Nâ‚‚, Oâ‚‚

Biome: Oceanic/Continental

Planet 2 - Terrestrial

Semi-Major Axis: 1.33 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.23

Radius: 1.78

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.101

Orbit Range: 1.2 AU - 1.46 AU

Year: 572 Days

Day: 40.1 Hours

Environment

Temp: -40 °C

Axial Tilt: 49.9 °

Atmosphere: Thin Nâ‚‚/CHâ‚„

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 108,675,322 km

  • M1: 323,580 km (0.093 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.52 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.57

Radius: 1.66

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.211

Orbit Range: 1.2 AU - 1.84 AU

Year: 699 Days

Day: 35.1 Hours

Environment

Temp: -46 °C

Axial Tilt: 24 °

Atmosphere: Thin Nâ‚‚/CHâ‚„

Biome: Ice Cap/Desert

Planet 4 - Terrestrial

Semi-Major Axis: 1.77 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.17

Radius: 1.36

Gravity: 1.17 G

Time & Orbit

Eccentricity (e): 0.008

Orbit Range: 1.76 AU - 1.78 AU

Year: 878 Days

Day: 14.9 Hours

Environment

Temp: -62 °C

Axial Tilt: 3.4 °

Atmosphere: Thin Nâ‚‚/CHâ‚„

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 108,675,322 km

  • M1: 47,423 km (0.082 R)

Planet 5 - Terrestrial

Semi-Major Axis: 1.96 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.1

Radius: 1.04

Gravity: 1.02 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 1.87 AU - 2.05 AU

Year: 1023 Days

Day: 37.8 Hours

Environment

Temp: -76 °C

Axial Tilt: 20.8 °

Atmosphere: Thin Nâ‚‚/CHâ‚„

Biome: Ice Cap/Desert

Planet 6 - Terrestrial

Semi-Major Axis: 4.24 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.99

Radius: 1.74

Gravity: 1.32 G

Time & Orbit

Eccentricity (e): 0.241

Orbit Range: 3.22 AU - 5.26 AU

Year: 3255 Days

Day: 13.5 Hours

Environment

Temp: -128 °C

Axial Tilt: 24.8 °

Atmosphere: Thin Nâ‚‚/CHâ‚„

Biome: Ice Cap/Desert

Planet 7 - Gas Giant

Semi-Major Axis: 7.12 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 661.3

Radius: 9.6

Gravity: 7.18 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 5.61 AU - 8.63 AU

Year: 7082 Days

Day: 8.8 Hours

Environment

Temp: -170 °C

Axial Tilt: 19.3 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (86)

Outer Limit: 108,675,322 km

  • M1: 132,693 km (0.118 R)
  • M2: 365,019 km (0.102 R)
  • M3: 430,842 km (0.08 R)
  • M4: 551,567 km (0.106 R)
  • M5: 844,330 km (0.07 R)
  • M6: 936,782 km (0.091 R)
  • M7: 1,183,469 km (0.059 R)
  • M8: 1,469,649 km (0.094 R)
  • M9: 1,898,397 km (0.08 R)
  • M10: 2,299,170 km (0.092 R)
  • M11: 2,408,975 km (0.085 R)
  • M12: 2,588,642 km (0.054 R)
  • M13: 2,819,321 km (0.098 R)
  • M14: 3,450,176 km (0.053 R)
  • M15: 3,551,154 km (0.063 R)
  • M16: 3,912,284 km (0.094 R)
  • M17: 5,383,429 km (0.067 R)
  • M18: 5,500,863 km (0.085 R)
  • M19: 5,798,114 km (0.115 R)
  • M20: 5,858,253 km (0.061 R)
  • M21: 6,100,601 km (0.083 R)
  • M22: 6,346,390 km (0.078 R)
  • M23: 6,816,128 km (0.115 R)
  • M24: 6,911,422 km (0.081 R)
  • M25: 7,007,164 km (0.089 R)
  • M26: 7,071,192 km (0.052 R)
  • M27: 7,755,752 km (0.072 R)
  • M28: 7,921,955 km (0.1 R)
  • M29: 7,988,676 km (0.108 R)
  • M30: 8,257,653 km (0.05 R)
  • M31: 8,427,297 km (0.099 R)
  • M32: 9,328,175 km (0.082 R)
  • M33: 10,005,704 km (0.098 R)
  • M34: 10,223,070 km (0.082 R)
  • M35: 10,332,276 km (0.115 R)
  • M36: 11,257,539 km (0.061 R)
  • M37: 11,445,733 km (0.066 R)
  • M38: 11,521,430 km (0.032 R)
  • M39: 11,787,265 km (0.104 R)
  • M40: 12,016,748 km (0.075 R)
  • M41: 12,480,352 km (0.1 R)
  • M42: 13,028,479 km (0.119 R)
  • M43: 14,067,286 km (0.072 R)
  • M44: 15,632,977 km (0.112 R)
  • M45: 16,607,308 km (0.097 R)
  • M46: 16,692,878 km (0.068 R)
  • M47: 16,950,785 km (0.047 R)
  • M48: 17,080,187 km (0.107 R)
  • M49: 18,083,241 km (0.096 R)
  • M50: 18,525,303 km (0.103 R)
  • M51: 19,195,202 km (0.066 R)
  • M52: 19,555,583 km (0.118 R)
  • M53: 20,009,314 km (0.108 R)
  • M54: 20,742,642 km (0.058 R)
  • M55: 20,973,621 km (0.104 R)
  • M56: 21,066,223 km (0.106 R)
  • M57: 21,484,648 km (0.097 R)
  • M58: 23,090,132 km (0.057 R)
  • M59: 23,425,531 km (0.077 R)
  • M60: 23,569,743 km (0.063 R)
  • M61: 23,907,385 km (0.097 R)
  • M62: 24,587,457 km (0.085 R)
  • M63: 25,323,180 km (0.046 R)
  • M64: 26,565,440 km (0.096 R)
  • M65: 26,816,316 km (0.076 R)
  • M66: 26,967,111 km (0.099 R)
  • M67: 27,421,439 km (0.083 R)
  • M68: 27,522,717 km (0.082 R)
  • M69: 28,235,401 km (0.119 R)
  • M70: 28,593,987 km (0.076 R)
  • M71: 29,834,902 km (0.102 R)
  • M72: 30,409,507 km (0.109 R)
  • M73: 31,198,935 km (0.116 R)
  • M74: 31,357,658 km (0.091 R)
  • M75: 31,835,474 km (0.106 R)
  • M76: 33,228,978 km (0.085 R)
  • M77: 33,716,069 km (0.059 R)
  • M78: 34,423,667 km (0.113 R)
  • M79: 34,642,529 km (0.101 R)
  • M80: 34,861,689 km (0.104 R)
  • M81: 35,964,525 km (0.091 R)
  • M82: 36,075,527 km (0.095 R)
  • M83: 36,855,081 km (0.063 R)
  • M84: 37,303,127 km (0.101 R)
  • M85: 37,471,574 km (0.061 R)
  • M86: 37,583,922 km (0.09 R)

Planet 8 - Ice Giant

Semi-Major Axis: 12.67 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 807.7

Radius: 8

Gravity: 12.62 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 10.01 AU - 15.33 AU

Year: 16812 Days

Day: 23.1 Hours

Environment

Temp: -192 °C

Axial Tilt: 36 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (90)

Outer Limit: 108,675,322 km

  • M1: 382,073 km (0.117 R)
  • M2: 737,069 km (0.054 R)
  • M3: 898,934 km (0.089 R)
  • M4: 1,021,753 km (0.096 R)
  • M5: 1,367,325 km (0.072 R)
  • M6: 1,871,320 km (0.096 R)
  • M7: 2,029,894 km (0.093 R)
  • M8: 2,497,536 km (0.063 R)
  • M9: 3,528,415 km (0.099 R)
  • M10: 4,294,805 km (0.089 R)
  • M11: 4,718,317 km (0.069 R)
  • M12: 5,468,849 km (0.06 R)
  • M13: 5,788,690 km (0.107 R)
  • M14: 5,881,291 km (0.119 R)
  • M15: 6,494,492 km (0.055 R)
  • M16: 6,590,684 km (0.088 R)
  • M17: 7,078,522 km (0.11 R)
  • M18: 7,177,556 km (0.09 R)
  • M19: 7,477,350 km (0.086 R)
  • M20: 7,781,184 km (0.077 R)
  • M21: 8,244,638 km (0.093 R)
  • M22: 8,770,026 km (0.114 R)
  • M23: 9,687,958 km (0.099 R)
  • M24: 10,019,168 km (0.114 R)
  • M25: 11,730,567 km (0.114 R)
  • M26: 11,789,210 km (0.07 R)
  • M27: 12,202,100 km (0.069 R)
  • M28: 12,440,110 km (0.12 R)
  • M29: 13,346,524 km (0.088 R)
  • M30: 13,469,044 km (0.069 R)
  • M31: 13,530,379 km (0.054 R)
  • M32: 13,591,864 km (0.077 R)
  • M33: 13,715,133 km (0.066 R)
  • M34: 13,838,701 km (0.069 R)
  • M35: 14,336,712 km (0.1 R)
  • M36: 14,651,017 km (0.096 R)
  • M37: 16,781,740 km (0.104 R)
  • M38: 21,109,606 km (0.039 R)
  • M39: 22,043,396 km (0.104 R)
  • M40: 23,063,953 km (0.115 R)
  • M41: 23,211,007 km (0.078 R)
  • M42: 24,323,716 km (0.103 R)
  • M43: 28,707,981 km (0.077 R)
  • M44: 30,302,993 km (0.114 R)
  • M45: 31,844,899 km (0.051 R)
  • M46: 32,008,559 km (0.096 R)
  • M47: 32,666,490 km (0.041 R)
  • M48: 33,079,979 km (0.059 R)
  • M49: 34,835,360 km (0.105 R)
  • M50: 35,257,825 km (0.06 R)
  • M51: 35,937,148 km (0.062 R)
  • M52: 36,278,531 km (0.113 R)
  • M53: 37,050,306 km (0.087 R)
  • M54: 37,136,475 km (0.081 R)
  • M55: 37,567,915 km (0.037 R)
  • M56: 37,827,617 km (0.102 R)
  • M57: 38,087,917 km (0.092 R)
  • M58: 38,348,816 km (0.075 R)
  • M59: 39,750,249 km (0.115 R)
  • M60: 40,368,686 km (0.105 R)
  • M61: 40,545,960 km (0.072 R)
  • M62: 42,964,209 km (0.075 R)
  • M63: 43,507,998 km (0.095 R)
  • M64: 43,780,714 km (0.052 R)
  • M65: 44,145,135 km (0.099 R)
  • M66: 45,060,823 km (0.115 R)
  • M67: 45,428,984 km (0.07 R)
  • M68: 46,075,396 km (0.081 R)
  • M69: 48,408,973 km (0.097 R)
  • M70: 49,732,466 km (0.118 R)
  • M71: 49,827,460 km (0.111 R)
  • M72: 50,112,744 km (0.101 R)
  • M73: 54,164,003 km (0.12 R)
  • M74: 54,359,677 km (0.112 R)
  • M75: 54,457,514 km (0.086 R)
  • M76: 54,751,325 km (0.119 R)
  • M77: 56,228,903 km (0.096 R)
  • M78: 58,519,695 km (0.096 R)
  • M79: 62,473,268 km (0.087 R)
  • M80: 64,741,321 km (0.088 R)
  • M81: 64,844,992 km (0.097 R)
  • M82: 65,260,426 km (0.114 R)
  • M83: 66,094,134 km (0.104 R)
  • M84: 66,826,416 km (0.076 R)
  • M85: 67,982,508 km (0.079 R)
  • M86: 68,404,674 km (0.11 R)
  • M87: 70,208,076 km (0.097 R)
  • M88: 70,634,729 km (0.094 R)
  • M89: 70,955,317 km (0.087 R)
  • M90: 71,169,242 km (0.055 R)

Planet 9 - Ice Giant

Semi-Major Axis: 14.35 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 181.5

Radius: 6.5

Gravity: 4.3 G

Time & Orbit

Eccentricity (e): 0.011

Orbit Range: 14.19 AU - 14.51 AU

Year: 20264 Days

Day: 21.8 Hours

Environment

Temp: -192 °C

Axial Tilt: 1.1 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (84)

Outer Limit: 108,675,322 km

  • M1: 162,314 km (0.108 R)
  • M2: 459,864 km (0.043 R)
  • M3: 582,385 km (0.096 R)
  • M4: 631,153 km (0.08 R)
  • M5: 715,676 km (0.087 R)
  • M6: 1,431,951 km (0.117 R)
  • M7: 1,544,897 km (0.103 R)
  • M8: 2,152,414 km (0.108 R)
  • M9: 2,204,025 km (0.114 R)
  • M10: 2,826,652 km (0.067 R)
  • M11: 3,653,180 km (0.088 R)
  • M12: 3,808,313 km (0.104 R)
  • M13: 5,125,223 km (0.084 R)
  • M14: 5,229,194 km (0.065 R)
  • M15: 5,509,989 km (0.038 R)
  • M16: 5,723,764 km (0.051 R)
  • M17: 6,418,796 km (0.107 R)
  • M18: 6,568,543 km (0.107 R)
  • M19: 6,947,774 km (0.073 R)
  • M20: 7,295,290 km (0.116 R)
  • M21: 7,412,425 km (0.09 R)
  • M22: 8,494,018 km (0.1 R)
  • M23: 8,658,575 km (0.106 R)
  • M24: 8,907,057 km (0.118 R)
  • M25: 9,074,158 km (0.107 R)
  • M26: 9,158,082 km (0.081 R)
  • M27: 9,581,594 km (0.101 R)
  • M28: 9,624,229 km (0.102 R)
  • M29: 11,113,476 km (0.072 R)
  • M30: 11,474,157 km (0.088 R)
  • M31: 14,202,074 km (0.096 R)
  • M32: 14,397,299 km (0.077 R)
  • M33: 14,446,218 km (0.093 R)
  • M34: 15,436,705 km (0.101 R)
  • M35: 16,346,859 km (0.104 R)
  • M36: 16,551,359 km (0.091 R)
  • M37: 17,378,336 km (0.118 R)
  • M38: 18,430,607 km (0.072 R)
  • M39: 18,483,864 km (0.111 R)
  • M40: 18,537,121 km (0.09 R)
  • M41: 19,775,043 km (0.111 R)
  • M42: 20,486,531 km (0.105 R)
  • M43: 20,817,591 km (0.066 R)
  • M44: 21,039,445 km (0.097 R)
  • M45: 21,150,596 km (0.093 R)
  • M46: 22,216,630 km (0.106 R)
  • M47: 22,443,271 km (0.109 R)
  • M48: 22,613,813 km (0.114 R)
  • M49: 22,956,092 km (0.082 R)
  • M50: 23,242,572 km (0.109 R)
  • M51: 25,755,218 km (0.026 R)
  • M52: 26,471,642 km (0.101 R)
  • M53: 26,651,908 km (0.116 R)
  • M54: 26,953,048 km (0.086 R)
  • M55: 27,013,336 km (0.043 R)
  • M56: 27,194,649 km (0.087 R)
  • M57: 28,968,730 km (0.097 R)
  • M58: 29,713,578 km (0.091 R)
  • M59: 30,402,027 km (0.061 R)
  • M60: 31,412,710 km (0.105 R)
  • M61: 32,305,959 km (0.109 R)
  • M62: 33,726,541 km (0.098 R)
  • M63: 33,791,616 km (0.064 R)
  • M64: 34,117,590 km (0.105 R)
  • M65: 34,641,182 km (0.071 R)
  • M66: 35,035,672 km (0.057 R)
  • M67: 35,101,644 km (0.084 R)
  • M68: 36,028,403 km (0.074 R)
  • M69: 36,829,201 km (0.105 R)
  • M70: 37,298,938 km (0.043 R)
  • M71: 37,568,364 km (0.056 R)
  • M72: 38,516,216 km (0.119 R)
  • M73: 39,061,500 km (0.111 R)
  • M74: 39,540,512 km (0.089 R)
  • M75: 41,755,458 km (0.113 R)
  • M76: 41,895,332 km (0.096 R)
  • M77: 43,513,832 km (0.115 R)
  • M78: 43,584,592 km (0.103 R)
  • M79: 43,939,438 km (0.12 R)
  • M80: 44,223,823 km (0.085 R)
  • M81: 44,508,957 km (0.094 R)
  • M82: 44,580,315 km (0.089 R)
  • M83: 44,723,181 km (0.105 R)
  • M84: 46,449,391 km (0.062 R)

Planet 10 - Ice Giant

Semi-Major Axis: 19.53 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 771.2

Radius: 6.5

Gravity: 18.25 G

Time & Orbit

Eccentricity (e): 0.197

Orbit Range: 15.68 AU - 23.38 AU

Year: 32174 Days

Day: 20.7 Hours

Environment

Temp: -198 °C

Axial Tilt: 47 °

Atmosphere: Hâ‚‚, CHâ‚„

Biome: None

Satellites (97)

Outer Limit: 108,675,322 km

  • M1: 173,534 km (0.048 R)
  • M2: 260,749 km (0.101 R)
  • M3: 343,028 km (0.099 R)
  • M4: 388,057 km (0.088 R)
  • M5: 589,565 km (0.118 R)
  • M6: 645,066 km (0.086 R)
  • M7: 982,409 km (0.095 R)
  • M8: 1,117,496 km (0.093 R)
  • M9: 1,294,919 km (0.067 R)
  • M10: 1,519,914 km (0.104 R)
  • M11: 1,637,049 km (0.082 R)
  • M12: 2,091,977 km (0.042 R)
  • M13: 2,584,303 km (0.056 R)
  • M14: 3,310,900 km (0.078 R)
  • M15: 3,935,172 km (0.048 R)
  • M16: 4,651,596 km (0.115 R)
  • M17: 4,995,671 km (0.045 R)
  • M18: 5,467,353 km (0.11 R)
  • M19: 5,953,247 km (0.098 R)
  • M20: 6,389,624 km (0.092 R)
  • M21: 7,425,440 km (0.113 R)
  • M22: 7,625,452 km (0.062 R)
  • M23: 7,759,791 km (0.117 R)
  • M24: 7,827,260 km (0.032 R)
  • M25: 7,894,878 km (0.091 R)
  • M26: 9,721,019 km (0.077 R)
  • M27: 10,308,191 km (0.059 R)
  • M28: 10,680,989 km (0.096 R)
  • M29: 13,492,531 km (0.09 R)
  • M30: 13,655,144 km (0.118 R)
  • M31: 16,690,335 km (0.077 R)
  • M32: 16,864,916 km (0.092 R)
  • M33: 17,215,723 km (0.105 R)
  • M34: 21,042,586 km (0.06 R)
  • M35: 21,325,625 km (0.079 R)
  • M36: 21,800,150 km (0.062 R)
  • M37: 22,759,670 km (0.113 R)
  • M38: 24,027,662 km (0.116 R)
  • M39: 24,224,682 km (0.042 R)
  • M40: 24,620,518 km (0.072 R)
  • M41: 25,719,913 km (0.111 R)
  • M42: 26,529,537 km (0.03 R)
  • M43: 26,631,413 km (0.084 R)
  • M44: 27,142,290 km (0.05 R)
  • M45: 31,344,344 km (0.107 R)
  • M46: 32,426,086 km (0.045 R)
  • M47: 32,534,844 km (0.029 R)
  • M48: 34,071,513 km (0.116 R)
  • M49: 34,403,770 km (0.049 R)
  • M50: 37,328,708 km (0.037 R)
  • M51: 39,981,826 km (0.073 R)
  • M52: 40,683,889 km (0.054 R)
  • M53: 40,918,758 km (0.115 R)
  • M54: 41,508,173 km (0.102 R)
  • M55: 41,863,019 km (0.106 R)
  • M56: 43,652,659 km (0.058 R)
  • M57: 46,813,512 km (0.084 R)
  • M58: 47,059,601 km (0.1 R)
  • M59: 47,800,708 km (0.096 R)
  • M60: 49,795,895 km (0.043 R)
  • M61: 49,921,408 km (0.101 R)
  • M62: 51,056,556 km (0.1 R)
  • M63: 53,480,640 km (0.087 R)
  • M64: 55,550,925 km (0.106 R)
  • M65: 57,252,302 km (0.11 R)
  • M66: 58,970,583 km (0.061 R)
  • M67: 60,840,108 km (0.093 R)
  • M68: 61,647,188 km (0.094 R)
  • M69: 63,680,522 km (0.085 R)
  • M70: 67,673,439 km (0.068 R)
  • M71: 67,951,841 km (0.108 R)
  • M72: 69,489,557 km (0.044 R)
  • M73: 70,051,447 km (0.105 R)
  • M74: 70,333,140 km (0.049 R)
  • M75: 73,884,294 km (0.1 R)
  • M76: 75,898,480 km (0.099 R)
  • M77: 78,953,119 km (0.105 R)
  • M78: 79,246,181 km (0.11 R)
  • M79: 80,127,462 km (0.096 R)
  • M80: 80,864,381 km (0.115 R)
  • M81: 83,386,302 km (0.113 R)
  • M82: 85,182,075 km (0.109 R)
  • M83: 85,332,421 km (0.085 R)
  • M84: 88,659,477 km (0.111 R)
  • M85: 89,727,008 km (0.115 R)
  • M86: 90,645,389 km (0.06 R)
  • M87: 92,645,961 km (0.106 R)
  • M88: 94,194,748 km (0.1 R)
  • M89: 95,283,970 km (0.109 R)
  • M90: 96,064,422 km (0.109 R)
  • M91: 97,160,825 km (0.111 R)
  • M92: 98,734,295 km (0.111 R)
  • M93: 99,998,996 km (0.114 R)
  • M94: 100,157,420 km (0.117 R)
  • M95: 103,184,383 km (0.095 R)
  • M96: 105,917,985 km (0.116 R)
  • M97: 106,564,697 km (0.089 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 232 - 16,257 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit