🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 1.89 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 239.7

Radius: 12

Gravity: 1.66 G

Time & Orbit

Eccentricity (e): 0.199

Orbit Range: 1.51 AU - 2.27 AU

Year: 1762 Days

Day: 7.2 Hours

Environment

Temp: -192 °C

Axial Tilt: 15.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (55)

Outer Limit: 37,501,731 km

• M1: 152,889 km (0.037 R)
• M2: 330,761 km (0.087 R)
• M3: 436,527 km (0.075 R)
• M4: 536,308 km (0.105 R)
• M5: 715,377 km (0.092 R)
• M6: 857,196 km (0.07 R)
• M7: 942,018 km (0.118 R)
• M8: 1,064,538 km (0.059 R)
• M9: 1,372,411 km (0.095 R)
• M10: 1,497,175 km (0.078 R)
• M11: 1,767,200 km (0.08 R)
• M12: 1,982,321 km (0.11 R)
• M13: 2,097,661 km (0.098 R)
• M14: 2,206,269 km (0.103 R)
• M15: 2,288,997 km (0.107 R)
• M16: 2,410,321 km (0.042 R)
• M17: 2,514,740 km (0.116 R)
• M18: 2,679,148 km (0.096 R)
• M19: 2,988,367 km (0.105 R)
• M20: 3,090,692 km (0.068 R)
• M21: 3,183,742 km (0.066 R)
• M22: 3,351,441 km (0.119 R)
• M23: 3,489,969 km (0.034 R)
• M24: 3,587,058 km (0.096 R)
• M25: 3,761,788 km (0.082 R)
• M26: 3,850,200 km (0.104 R)
• M27: 3,973,020 km (0.089 R)
• M28: 4,199,811 km (0.089 R)
• M29: 4,384,115 km (0.054 R)
• M30: 4,761,251 km (0.075 R)
• M31: 4,881,229 km (0.076 R)
• M32: 4,989,987 km (0.096 R)
• M33: 5,087,524 km (0.055 R)
• M34: 5,234,878 km (0.041 R)
• M35: 5,321,645 km (0.049 R)
• M36: 5,584,489 km (0.112 R)
• M37: 6,345,792 km (0.111 R)
• M38: 6,451,558 km (0.118 R)
• M39: 7,016,589 km (0.117 R)
• M40: 7,112,332 km (0.075 R)
• M41: 7,194,760 km (0.116 R)
• M42: 7,305,014 km (0.1 R)
• M43: 7,569,503 km (0.106 R)
• M44: 7,893,831 km (0.111 R)
• M45: 8,007,675 km (0.045 R)
• M46: 8,122,117 km (0.115 R)
• M47: 8,352,648 km (0.066 R)
• M48: 8,483,246 km (0.101 R)
• M49: 8,673,236 km (0.092 R)
• M50: 9,131,753 km (0.079 R)
• M51: 9,206,552 km (0.025 R)
• M52: 9,326,380 km (0.097 R)
• M53: 9,462,065 km (0.092 R)
• M54: 10,134,358 km (0.098 R)
• M55: 10,507,605 km (0.081 R)

Planet 2 - Gas Giant

Semi-Major Axis: 3.19 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 289.9

Radius: 12.6

Gravity: 1.83 G

Time & Orbit

Eccentricity (e): 0.237

Orbit Range: 2.43 AU - 3.95 AU

Year: 3864 Days

Day: 5.7 Hours

Environment

Temp: -217 °C

Axial Tilt: 3.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 37,501,731 km

• M1: 161,416 km (0.114 R)
• M2: 387,758 km (0.047 R)
• M3: 545,583 km (0.071 R)
• M4: 676,482 km (0.062 R)
• M5: 943,813 km (0.048 R)
• M6: 1,170,005 km (0.103 R)
• M7: 1,267,842 km (0.11 R)
• M8: 1,402,929 km (0.108 R)
• M9: 1,566,738 km (0.07 R)
• M10: 1,774,829 km (0.119 R)
• M11: 1,914,254 km (0.083 R)
• M12: 2,164,232 km (0.088 R)
• M13: 2,245,464 km (0.078 R)
• M14: 2,327,743 km (0.113 R)
• M15: 2,623,797 km (0.061 R)
• M16: 3,022,625 km (0.064 R)
• M17: 3,159,956 km (0.1 R)
• M18: 3,425,043 km (0.114 R)
• M19: 3,536,344 km (0.062 R)
• M20: 3,828,359 km (0.052 R)
• M21: 4,010,719 km (0.101 R)
• M22: 4,229,880 km (0.053 R)
• M23: 4,315,300 km (0.105 R)
• M24: 4,662,666 km (0.067 R)
• M25: 4,804,186 km (0.104 R)
• M26: 5,091,713 km (0.101 R)
• M27: 5,347,825 km (0.094 R)
• M28: 5,514,776 km (0.066 R)
• M29: 5,721,221 km (0.077 R)
• M30: 6,258,277 km (0.105 R)
• M31: 6,572,433 km (0.072 R)
• M32: 6,691,662 km (0.085 R)
• M33: 6,972,458 km (0.076 R)
• M34: 8,028,469 km (0.089 R)
• M35: 8,198,711 km (0.07 R)
• M36: 8,738,311 km (0.085 R)
• M37: 9,289,579 km (0.092 R)
• M38: 9,558,107 km (0.085 R)
• M39: 9,761,261 km (0.104 R)
• M40: 10,103,092 km (0.05 R)
• M41: 10,309,986 km (0.12 R)
• M42: 11,010,104 km (0.083 R)
• M43: 11,175,709 km (0.118 R)
• M44: 11,270,704 km (0.119 R)
• M45: 11,365,848 km (0.081 R)
• M46: 11,749,716 km (0.063 R)
• M47: 12,040,235 km (0.096 R)
• M48: 12,603,920 km (0.113 R)
• M49: 12,802,137 km (0.079 R)
• M50: 13,402,623 km (0.105 R)
• M51: 13,731,738 km (0.075 R)
• M52: 13,833,465 km (0.058 R)
• M53: 14,217,632 km (0.11 R)
• M54: 14,813,331 km (0.108 R)
• M55: 14,943,930 km (0.113 R)
• M56: 15,470,065 km (0.106 R)
• M57: 15,576,130 km (0.066 R)
• M58: 15,948,928 km (0.116 R)
• M59: 16,405,650 km (0.091 R)
• M60: 16,540,737 km (0.103 R)
• M61: 16,676,273 km (0.105 R)
• M62: 16,893,788 km (0.071 R)
• M63: 17,030,371 km (0.052 R)
• M64: 17,249,382 km (0.045 R)
• M65: 17,386,863 km (0.108 R)
• M66: 17,552,318 km (0.112 R)
• M67: 17,690,547 km (0.058 R)
• M68: 18,135,301 km (0.095 R)
• M69: 18,387,224 km (0.119 R)
• M70: 18,866,087 km (0.072 R)

Planet 3 - Ice Giant

Semi-Major Axis: 6.12 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 340.7

Radius: 6.6

Gravity: 7.82 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 5.25 AU - 6.99 AU

Year: 10269 Days

Day: 21.8 Hours

Environment

Temp: -226 °C

Axial Tilt: 11.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 37,501,731 km

• M1: 115,041 km (0.073 R)
• M2: 183,108 km (0.062 R)
• M3: 253,269 km (0.108 R)
• M4: 402,269 km (0.099 R)
• M5: 539,450 km (0.115 R)
• M6: 796,459 km (0.085 R)
• M7: 842,834 km (0.079 R)
• M8: 922,420 km (0.068 R)
• M9: 1,394,551 km (0.039 R)
• M10: 1,931,907 km (0.104 R)
• M11: 2,038,121 km (0.05 R)
• M12: 2,643,843 km (0.096 R)
• M13: 3,077,079 km (0.105 R)
• M14: 3,201,245 km (0.057 R)
• M15: 3,301,924 km (0.092 R)
• M16: 3,429,232 km (0.12 R)
• M17: 3,767,622 km (0.074 R)
• M18: 3,981,248 km (0.11 R)
• M19: 4,226,289 km (0.1 R)
• M20: 4,364,667 km (0.064 R)
• M21: 4,448,293 km (0.059 R)
• M22: 4,932,691 km (0.077 R)
• M23: 5,225,454 km (0.114 R)
• M24: 5,523,752 km (0.116 R)
• M25: 6,012,787 km (0.074 R)
• M26: 6,452,007 km (0.055 R)
• M27: 6,515,586 km (0.106 R)
• M28: 6,579,314 km (0.046 R)
• M29: 6,934,011 km (0.116 R)
• M30: 7,460,895 km (0.064 R)
• M31: 8,069,160 km (0.107 R)
• M32: 8,518,252 km (0.093 R)
• M33: 8,904,514 km (0.074 R)
• M34: 9,657,889 km (0.053 R)
• M35: 9,730,743 km (0.105 R)
• M36: 10,282,759 km (0.101 R)
• M37: 10,769,401 km (0.068 R)
• M38: 11,148,781 km (0.086 R)
• M39: 11,340,117 km (0.106 R)
• M40: 11,609,842 km (0.105 R)
• M41: 11,998,796 km (0.034 R)
• M42: 12,234,263 km (0.106 R)
• M43: 12,313,102 km (0.064 R)
• M44: 12,869,606 km (0.097 R)
• M45: 13,110,608 km (0.069 R)
• M46: 13,231,632 km (0.074 R)
• M47: 14,337,909 km (0.117 R)
• M48: 14,587,737 km (0.057 R)
• M49: 15,176,405 km (0.06 R)
• M50: 15,218,741 km (0.104 R)
• M51: 15,261,077 km (0.1 R)
• M52: 16,463,694 km (0.114 R)
• M53: 16,856,688 km (0.037 R)
• M54: 17,385,367 km (0.116 R)
• M55: 17,785,541 km (0.062 R)
• M56: 17,874,851 km (0.084 R)
• M57: 19,462,234 km (0.05 R)
• M58: 20,109,843 km (0.119 R)
• M59: 20,576,589 km (0.068 R)
• M60: 20,623,562 km (0.084 R)
• M61: 20,717,360 km (0.119 R)
• M62: 22,094,409 km (0.088 R)
• M63: 22,769,694 km (0.115 R)
• M64: 22,963,872 km (0.044 R)
• M65: 23,207,417 km (0.043 R)
• M66: 23,256,186 km (0.095 R)
• M67: 23,696,901 km (0.089 R)
• M68: 24,041,724 km (0.086 R)
• M69: 24,189,976 km (0.116 R)
• M70: 24,785,974 km (0.093 R)
• M71: 24,885,905 km (0.106 R)
• M72: 25,035,802 km (0.098 R)
• M73: 25,085,917 km (0.049 R)
• M74: 25,840,788 km (0.067 R)
• M75: 26,297,211 km (0.094 R)
• M76: 26,909,964 km (0.086 R)
• M77: 27,527,504 km (0.083 R)
• M78: 29,407,949 km (0.101 R)
• M79: 29,513,566 km (0.103 R)
• M80: 32,305,211 km (0.037 R)
• M81: 32,523,475 km (0.099 R)
• M82: 34,064,632 km (0.074 R)
• M83: 34,397,936 km (0.118 R)
• M84: 36,024,364 km (0.042 R)
• M85: 36,250,706 km (0.086 R)
• M86: 36,307,254 km (0.088 R)
• M87: 36,761,582 km (0.111 R)
• M88: 37,618,329 km (0.114 R)
• M89: 38,597,148 km (0.088 R)

Planet 4 - Ice Giant

Semi-Major Axis: 7.73 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 662.3

Radius: 5.6

Gravity: 21.12 G

Time & Orbit

Eccentricity (e): 0.229

Orbit Range: 5.96 AU - 9.5 AU

Year: 14577 Days

Day: 20.6 Hours

Environment

Temp: -242 °C

Axial Tilt: 4.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (88)

Outer Limit: 37,501,731 km

• M1: 254,915 km (0.11 R)
• M2: 434,582 km (0.117 R)
• M3: 833,410 km (0.064 R)
• M4: 1,009,337 km (0.085 R)
• M5: 1,055,114 km (0.034 R)
• M6: 1,631,514 km (0.119 R)
• M7: 1,713,045 km (0.114 R)
• M8: 2,023,311 km (0.076 R)
• M9: 2,727,319 km (0.095 R)
• M10: 2,856,871 km (0.112 R)
• M11: 3,055,237 km (0.09 R)
• M12: 3,257,942 km (0.109 R)
• M13: 4,075,046 km (0.08 R)
• M14: 4,717,718 km (0.059 R)
• M15: 5,677,688 km (0.085 R)
• M16: 6,095,066 km (0.111 R)
• M17: 6,436,000 km (0.117 R)
• M18: 7,047,705 km (0.11 R)
• M19: 7,541,229 km (0.107 R)
• M20: 7,586,557 km (0.095 R)
• M21: 7,723,439 km (0.065 R)
• M22: 8,608,759 km (0.089 R)
• M23: 9,821,699 km (0.098 R)
• M24: 10,676,800 km (0.097 R)
• M25: 10,881,450 km (0.049 R)
• M26: 11,503,029 km (0.094 R)
• M27: 11,607,748 km (0.099 R)
• M28: 11,818,232 km (0.107 R)
• M29: 11,923,848 km (0.101 R)
• M30: 14,609,429 km (0.102 R)
• M31: 14,893,515 km (0.08 R)
• M32: 15,409,628 km (0.073 R)
• M33: 17,291,569 km (0.069 R)
• M34: 18,259,318 km (0.073 R)
• M35: 18,565,395 km (0.116 R)
• M36: 18,749,849 km (0.112 R)
• M37: 19,120,553 km (0.092 R)
• M38: 19,743,777 km (0.099 R)
• M39: 20,500,443 km (0.096 R)
• M40: 21,523,992 km (0.117 R)
• M41: 22,172,200 km (0.08 R)
• M42: 22,695,343 km (0.082 R)
• M43: 22,892,513 km (0.114 R)
• M44: 23,620,457 km (0.045 R)
• M45: 24,356,029 km (0.074 R)
• M46: 24,557,986 km (0.068 R)
• M47: 25,849,764 km (0.065 R)
• M48: 26,538,363 km (0.119 R)
• M49: 27,023,958 km (0.095 R)
• M50: 27,652,718 km (0.093 R)
• M51: 27,863,351 km (0.068 R)
• M52: 28,498,544 km (0.112 R)
• M53: 28,924,599 km (0.05 R)
• M54: 29,067,165 km (0.082 R)
• M55: 29,352,748 km (0.058 R)
• M56: 30,071,117 km (0.095 R)
• M57: 32,852,889 km (0.054 R)
• M58: 35,639,449 km (0.067 R)
• M59: 35,715,744 km (0.061 R)
• M60: 35,945,227 km (0.075 R)
• M61: 36,175,009 km (0.085 R)
• M62: 36,251,753 km (0.107 R)
• M63: 36,405,390 km (0.118 R)
• M64: 37,642,265 km (0.117 R)
• M65: 38,657,436 km (0.072 R)
• M66: 38,971,592 km (0.111 R)
• M67: 40,236,591 km (0.072 R)
• M68: 41,034,098 km (0.09 R)
• M69: 41,675,872 km (0.108 R)
• M70: 41,917,323 km (0.074 R)
• M71: 43,213,140 km (0.06 R)
• M72: 43,784,305 km (0.086 R)
• M73: 44,029,795 km (0.066 R)
• M74: 46,927,655 km (0.112 R)
• M75: 48,188,466 km (0.066 R)
• M76: 48,441,885 km (0.102 R)
• M77: 49,204,984 km (0.096 R)
• M78: 50,142,962 km (0.099 R)
• M79: 51,345,430 km (0.112 R)
• M80: 52,383,639 km (0.061 R)
• M81: 54,568,666 km (0.094 R)
• M82: 54,832,856 km (0.087 R)
• M83: 55,450,994 km (0.111 R)
• M84: 55,982,665 km (0.115 R)
• M85: 56,961,783 km (0.107 R)
• M86: 57,140,403 km (0.083 R)
• M87: 57,319,172 km (0.109 R)
• M88: 58,936,924 km (0.054 R)

Planet 5 - Ice Giant

Semi-Major Axis: 9.18 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 350.3

Radius: 6.6

Gravity: 8.04 G

Time & Orbit

Eccentricity (e): 0.197

Orbit Range: 7.37 AU - 10.99 AU

Year: 18865 Days

Day: 24.9 Hours

Environment

Temp: -226 °C

Axial Tilt: 14 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 37,501,731 km

• M1: 91,703 km (0.108 R)
• M2: 416,630 km (0.089 R)
• M3: 532,120 km (0.077 R)
• M4: 795,113 km (0.063 R)
• M5: 877,392 km (0.087 R)
• M6: 984,204 km (0.115 R)
• M7: 1,028,336 km (0.099 R)
• M8: 1,141,282 km (0.089 R)
• M9: 1,530,386 km (0.045 R)
• M10: 1,633,758 km (0.099 R)
• M11: 1,985,762 km (0.08 R)
• M12: 2,450,862 km (0.067 R)
• M13: 2,758,286 km (0.103 R)
• M14: 2,821,266 km (0.102 R)
• M15: 3,342,316 km (0.038 R)
• M16: 3,545,320 km (0.116 R)
• M17: 3,648,243 km (0.116 R)
• M18: 3,892,537 km (0.077 R)
• M19: 4,214,471 km (0.033 R)
• M20: 4,323,678 km (0.097 R)
• M21: 5,348,423 km (0.068 R)
• M22: 5,625,927 km (0.096 R)
• M23: 5,826,987 km (0.099 R)
• M24: 6,996,244 km (0.068 R)
• M25: 7,299,628 km (0.11 R)
• M26: 9,684,817 km (0.057 R)
• M27: 10,660,793 km (0.09 R)
• M28: 11,616,873 km (0.032 R)
• M29: 11,667,886 km (0.085 R)
• M30: 11,821,673 km (0.107 R)
• M31: 11,976,058 km (0.084 R)
• M32: 12,286,772 km (0.083 R)
• M33: 12,547,671 km (0.094 R)
• M34: 13,288,031 km (0.081 R)
• M35: 13,341,587 km (0.085 R)
• M36: 13,394,993 km (0.047 R)
• M37: 13,502,255 km (0.088 R)
• M38: 14,315,469 km (0.071 R)
• M39: 14,370,222 km (0.117 R)
• M40: 14,425,124 km (0.112 R)
• M41: 14,534,929 km (0.103 R)
• M42: 15,256,140 km (0.104 R)
• M43: 16,102,715 km (0.109 R)
• M44: 17,022,443 km (0.097 R)
• M45: 17,488,589 km (0.069 R)
• M46: 17,605,874 km (0.098 R)
• M47: 18,374,059 km (0.085 R)
• M48: 18,672,507 km (0.106 R)
• M49: 18,732,346 km (0.09 R)
• M50: 18,792,335 km (0.115 R)
• M51: 19,153,315 km (0.119 R)
• M52: 19,638,161 km (0.073 R)
• M53: 20,496,255 km (0.071 R)
• M54: 20,681,756 km (0.105 R)
• M55: 20,743,690 km (0.106 R)
• M56: 21,304,083 km (0.069 R)
• M57: 21,366,765 km (0.086 R)
• M58: 21,869,414 km (0.116 R)
• M59: 21,932,544 km (0.083 R)
• M60: 22,758,623 km (0.112 R)
• M61: 24,179,803 km (0.104 R)
• M62: 24,966,987 km (0.096 R)
• M63: 25,165,055 km (0.117 R)
• M64: 26,499,019 km (0.074 R)
• M65: 27,242,520 km (0.07 R)
• M66: 27,446,572 km (0.111 R)
• M67: 28,267,415 km (0.113 R)
• M68: 29,304,876 km (0.059 R)
• M69: 29,374,439 km (0.11 R)
• M70: 29,583,577 km (0.112 R)
• M71: 30,073,510 km (0.067 R)
• M72: 31,916,706 km (0.109 R)
• M73: 31,988,363 km (0.05 R)
• M74: 32,996,503 km (0.117 R)
• M75: 33,650,246 km (0.051 R)
• M76: 33,942,111 km (0.116 R)
• M77: 34,088,418 km (0.119 R)
• M78: 35,266,052 km (0.117 R)
• M79: 35,340,103 km (0.067 R)
• M80: 37,207,982 km (0.09 R)
• M81: 38,040,046 km (0.104 R)
• M82: 39,414,701 km (0.091 R)
• M83: 39,876,509 km (0.116 R)
• M84: 42,763,748 km (0.081 R)
• M85: 44,432,213 km (0.048 R)
• M86: 48,078,661 km (0.106 R)
• M87: 48,160,791 km (0.105 R)
• M88: 48,984,476 km (0.113 R)
• M89: 49,979,003 km (0.093 R)
• M90: 50,813,011 km (0.102 R)
• M91: 51,904,028 km (0.097 R)
• M92: 52,833,181 km (0.113 R)
• M93: 54,108,951 km (0.086 R)

Planet 6 - Ice Giant

Semi-Major Axis: 9.79 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 76

Radius: 3.2

Gravity: 7.42 G

Time & Orbit

Eccentricity (e): 0.02

Orbit Range: 9.59 AU - 9.99 AU

Year: 20776 Days

Day: 24.8 Hours

Environment

Temp: -227 °C

Axial Tilt: 39.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (41)

Outer Limit: 37,501,731 km

• M1: 95,294 km (0.094 R)
• M2: 162,014 km (0.075 R)
• M3: 362,176 km (0.061 R)
• M4: 718,818 km (0.105 R)
• M5: 871,557 km (0.109 R)
• M6: 1,051,224 km (0.072 R)
• M7: 1,369,419 km (0.104 R)
• M8: 1,425,219 km (0.094 R)
• M9: 2,086,890 km (0.116 R)
• M10: 2,281,816 km (0.084 R)
• M11: 3,365,354 km (0.079 R)
• M12: 3,516,896 km (0.118 R)
• M13: 4,307,521 km (0.12 R)
• M14: 4,444,403 km (0.105 R)
• M15: 4,863,726 km (0.062 R)
• M16: 5,035,016 km (0.111 R)
• M17: 8,266,778 km (0.093 R)
• M18: 8,954,031 km (0.067 R)
• M19: 10,713,601 km (0.087 R)
• M20: 11,918,462 km (0.108 R)
• M21: 12,033,653 km (0.051 R)
• M22: 14,781,616 km (0.077 R)
• M23: 16,161,208 km (0.115 R)
• M24: 18,019,363 km (0.109 R)
• M25: 18,638,848 km (0.116 R)
• M26: 19,310,243 km (0.059 R)
• M27: 20,172,076 km (0.075 R)
• M28: 20,676,670 km (0.107 R)
• M29: 20,815,048 km (0.115 R)
• M30: 21,139,077 km (0.095 R)
• M31: 21,278,352 km (0.12 R)
• M32: 21,558,100 km (0.046 R)
• M33: 22,356,953 km (0.097 R)
• M34: 24,909,242 km (0.11 R)
• M35: 27,298,919 km (0.054 R)
• M36: 30,230,139 km (0.102 R)
• M37: 32,452,715 km (0.112 R)
• M38: 32,667,238 km (0.118 R)
• M39: 35,331,726 km (0.088 R)
• M40: 35,552,233 km (0.111 R)
• M41: 35,717,988 km (0.109 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 434 - 13,047 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit