🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 0.76 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 108.6

Radius: 8.6

Gravity: 1.47 G

Time & Orbit

Eccentricity (e): 0.223

Orbit Range: 0.59 AU - 0.93 AU

Year: 449 Days

Day: 11.2 Hours

Environment

Temp: -157 °C

Axial Tilt: 28.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (38)

Outer Limit: 85,878,649 km

• M1: 118,033 km (0.071 R)
• M2: 186,997 km (0.034 R)
• M3: 259,104 km (0.088 R)
• M4: 317,596 km (0.089 R)
• M5: 401,371 km (0.093 R)
• M6: 456,872 km (0.092 R)
• M7: 520,301 km (0.112 R)
• M8: 594,652 km (0.071 R)
• M9: 659,727 km (0.086 R)
• M10: 716,574 km (0.116 R)
• M11: 783,594 km (0.113 R)
• M12: 861,833 km (0.085 R)
• M13: 945,758 km (0.071 R)
• M14: 1,083,687 km (0.111 R)
• M15: 1,171,800 km (0.116 R)
• M16: 1,252,134 km (0.106 R)
• M17: 1,372,710 km (0.103 R)
• M18: 1,457,682 km (0.117 R)
• M19: 1,526,347 km (0.116 R)
• M20: 1,603,390 km (0.118 R)
• M21: 1,685,669 km (0.079 R)
• M22: 1,757,775 km (0.077 R)
• M23: 1,823,299 km (0.108 R)
• M24: 1,948,811 km (0.099 R)
• M25: 2,012,690 km (0.096 R)
• M26: 2,134,462 km (0.102 R)
• M27: 2,225,268 km (0.104 R)
• M28: 2,296,327 km (0.108 R)
• M29: 2,363,946 km (0.112 R)
• M30: 2,449,516 km (0.077 R)
• M31: 2,663,291 km (0.111 R)
• M32: 2,770,403 km (0.045 R)
• M33: 2,869,736 km (0.09 R)
• M34: 2,933,614 km (0.115 R)
• M35: 2,997,941 km (0.084 R)
• M36: 3,058,080 km (0.084 R)
• M37: 3,118,667 km (0.113 R)
• M38: 3,245,825 km (0.108 R)

Planet 2 - Gas Giant

Semi-Major Axis: 1.03 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 916.6

Radius: 9.6

Gravity: 9.95 G

Time & Orbit

Eccentricity (e): 0.15

Orbit Range: 0.88 AU - 1.18 AU

Year: 709 Days

Day: 12.3 Hours

Environment

Temp: -179 °C

Axial Tilt: 32 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 85,878,649 km

• M1: 148,551 km (0.078 R)
• M2: 270,772 km (0.119 R)
• M3: 406,009 km (0.075 R)
• M4: 523,443 km (0.117 R)
• M5: 592,108 km (0.099 R)
• M6: 734,226 km (0.087 R)
• M7: 841,488 km (0.063 R)
• M8: 972,536 km (0.08 R)
• M9: 1,085,033 km (0.094 R)
• M10: 1,316,760 km (0.084 R)
• M11: 1,399,937 km (0.112 R)
• M12: 1,905,129 km (0.083 R)
• M13: 2,047,995 km (0.097 R)
• M14: 2,128,927 km (0.057 R)
• M15: 2,310,838 km (0.066 R)
• M16: 2,420,643 km (0.038 R)
• M17: 2,541,069 km (0.108 R)
• M18: 2,663,440 km (0.074 R)
• M19: 2,778,930 km (0.072 R)
• M20: 2,950,668 km (0.077 R)
• M21: 3,153,822 km (0.113 R)
• M22: 3,525,573 km (0.101 R)
• M23: 3,642,858 km (0.094 R)
• M24: 3,741,443 km (0.039 R)
• M25: 3,811,155 km (0.085 R)
• M26: 4,258,752 km (0.09 R)
• M27: 4,488,834 km (0.073 R)
• M28: 4,616,141 km (0.062 R)
• M29: 4,712,333 km (0.073 R)
• M30: 4,972,334 km (0.049 R)
• M31: 5,059,998 km (0.116 R)
• M32: 5,159,331 km (0.061 R)
• M33: 5,259,263 km (0.1 R)
• M34: 5,461,070 km (0.085 R)
• M35: 5,619,794 km (0.052 R)
• M36: 5,780,163 km (0.116 R)
• M37: 5,849,426 km (0.052 R)
• M38: 6,046,896 km (0.078 R)
• M39: 6,234,790 km (0.083 R)
• M40: 6,436,598 km (0.07 R)
• M41: 6,592,329 km (0.054 R)
• M42: 6,737,290 km (0.074 R)
• M43: 6,822,261 km (0.06 R)
• M44: 6,968,867 km (0.09 R)
• M45: 7,030,352 km (0.087 R)
• M46: 7,116,520 km (0.108 R)
• M47: 7,178,304 km (0.117 R)
• M48: 7,240,387 km (0.104 R)
• M49: 7,327,453 km (0.107 R)
• M50: 7,439,951 km (0.118 R)
• M51: 7,742,887 km (0.115 R)
• M52: 7,934,372 km (0.114 R)
• M53: 8,024,131 km (0.064 R)
• M54: 8,347,860 km (0.075 R)
• M55: 8,596,642 km (0.118 R)
• M56: 8,675,779 km (0.026 R)
• M57: 8,741,901 km (0.044 R)
• M58: 8,821,487 km (0.086 R)

Planet 3 - Gas Giant

Semi-Major Axis: 5.31 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 732.1

Radius: 14.8

Gravity: 3.34 G

Time & Orbit

Eccentricity (e): 0.2

Orbit Range: 4.25 AU - 6.37 AU

Year: 8299 Days

Day: 11.4 Hours

Environment

Temp: -227 °C

Axial Tilt: 15.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 85,878,649 km

• M1: 214,823 km (0.059 R)
• M2: 334,351 km (0.112 R)
• M3: 430,692 km (0.101 R)
• M4: 541,843 km (0.111 R)
• M5: 637,287 km (0.108 R)
• M6: 1,051,523 km (0.081 R)
• M7: 1,270,984 km (0.115 R)
• M8: 1,386,623 km (0.102 R)
• M9: 1,485,956 km (0.051 R)
• M10: 1,650,364 km (0.111 R)
• M11: 1,930,860 km (0.067 R)
• M12: 2,065,797 km (0.07 R)
• M13: 2,297,973 km (0.068 R)
• M14: 2,813,936 km (0.094 R)
• M15: 3,125,100 km (0.099 R)
• M16: 3,258,242 km (0.119 R)
• M17: 4,360,928 km (0.102 R)
• M18: 4,570,514 km (0.072 R)
• M19: 5,062,242 km (0.038 R)
• M20: 5,410,207 km (0.102 R)
• M21: 5,635,801 km (0.109 R)
• M22: 6,535,033 km (0.115 R)
• M23: 6,810,144 km (0.083 R)
• M24: 7,300,825 km (0.097 R)
• M25: 8,652,591 km (0.102 R)
• M26: 9,299,452 km (0.041 R)
• M27: 9,765,450 km (0.117 R)
• M28: 10,040,859 km (0.111 R)
• M29: 10,199,433 km (0.046 R)
• M30: 11,332,637 km (0.097 R)
• M31: 11,705,435 km (0.054 R)
• M32: 12,208,682 km (0.113 R)
• M33: 12,420,513 km (0.111 R)
• M34: 12,590,905 km (0.096 R)
• M35: 12,762,045 km (0.117 R)
• M36: 13,367,019 km (0.114 R)
• M37: 13,981,567 km (0.096 R)
• M38: 14,965,771 km (0.041 R)
• M39: 15,329,294 km (0.041 R)
• M40: 16,812,258 km (0.056 R)
• M41: 18,340,699 km (0.118 R)
• M42: 18,486,258 km (0.039 R)
• M43: 18,778,572 km (0.06 R)
• M44: 19,023,314 km (0.095 R)
• M45: 19,367,838 km (0.09 R)
• M46: 19,714,307 km (0.108 R)
• M47: 20,263,032 km (0.032 R)
• M48: 21,426,604 km (0.061 R)
• M49: 21,785,190 km (0.112 R)
• M50: 21,939,425 km (0.087 R)
• M51: 22,300,704 km (0.109 R)
• M52: 22,404,226 km (0.088 R)
• M53: 22,508,047 km (0.088 R)
• M54: 22,768,048 km (0.051 R)
• M55: 22,872,318 km (0.108 R)
• M56: 23,924,290 km (0.095 R)
• M57: 24,402,853 km (0.104 R)
• M58: 24,723,591 km (0.097 R)
• M59: 24,884,559 km (0.085 R)
• M60: 25,911,698 km (0.093 R)
• M61: 26,020,605 km (0.049 R)
• M62: 26,677,489 km (0.1 R)
• M63: 26,842,645 km (0.093 R)
• M64: 27,617,413 km (0.116 R)
• M65: 27,840,164 km (0.043 R)
• M66: 29,189,088 km (0.09 R)
• M67: 30,272,027 km (0.11 R)
• M68: 31,426,174 km (0.092 R)
• M69: 31,600,605 km (0.1 R)
• M70: 31,892,022 km (0.099 R)
• M71: 33,066,216 km (0.118 R)
• M72: 33,599,383 km (0.1 R)
• M73: 33,896,634 km (0.11 R)
• M74: 35,155,200 km (0.11 R)
• M75: 38,896,942 km (0.047 R)
• M76: 40,656,513 km (0.1 R)
• M77: 41,227,528 km (0.109 R)
• M78: 41,993,169 km (0.099 R)
• M79: 42,698,972 km (0.067 R)

Planet 4 - Ice Giant

Semi-Major Axis: 7.13 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 668.9

Radius: 7.2

Gravity: 12.9 G

Time & Orbit

Eccentricity (e): 0.202

Orbit Range: 5.69 AU - 8.57 AU

Year: 12913 Days

Day: 15.8 Hours

Environment

Temp: -225 °C

Axial Tilt: 10.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 85,878,649 km

• M1: 129,851 km (0.12 R)
• M2: 182,809 km (0.083 R)
• M3: 490,232 km (0.071 R)
• M4: 917,035 km (0.071 R)
• M5: 1,001,109 km (0.042 R)
• M6: 1,316,012 km (0.12 R)
• M7: 2,032,586 km (0.092 R)
• M8: 2,851,186 km (0.061 R)
• M9: 3,425,941 km (0.086 R)
• M10: 4,353,298 km (0.059 R)
• M11: 4,863,277 km (0.104 R)
• M12: 5,978,679 km (0.083 R)
• M13: 6,421,638 km (0.025 R)
• M14: 6,544,308 km (0.111 R)
• M15: 7,467,627 km (0.091 R)
• M16: 8,297,595 km (0.048 R)
• M17: 8,610,554 km (0.113 R)
• M18: 8,791,268 km (0.116 R)
• M19: 9,156,287 km (0.052 R)
• M20: 9,248,440 km (0.118 R)
• M21: 9,760,214 km (0.084 R)
• M22: 9,901,285 km (0.097 R)
• M23: 10,233,392 km (0.1 R)
• M24: 10,424,728 km (0.05 R)
• M25: 10,908,378 km (0.088 R)
• M26: 11,897,668 km (0.12 R)
• M27: 11,998,048 km (0.049 R)
• M28: 12,048,463 km (0.106 R)
• M29: 12,504,886 km (0.1 R)
• M30: 12,812,160 km (0.088 R)
• M31: 14,924,332 km (0.111 R)
• M32: 15,032,641 km (0.101 R)
• M33: 15,359,513 km (0.09 R)
• M34: 15,688,628 km (0.043 R)
• M35: 17,483,204 km (0.098 R)
• M36: 18,114,956 km (0.099 R)
• M37: 18,230,595 km (0.107 R)
• M38: 18,637,501 km (0.099 R)
• M39: 19,223,775 km (0.109 R)
• M40: 20,234,309 km (0.081 R)
• M41: 20,474,563 km (0.109 R)
• M42: 20,655,427 km (0.071 R)
• M43: 20,715,864 km (0.072 R)
• M44: 21,201,160 km (0.093 R)
• M45: 22,617,253 km (0.086 R)
• M46: 24,000,136 km (0.053 R)
• M47: 25,410,096 km (0.12 R)
• M48: 26,059,949 km (0.065 R)
• M49: 27,774,789 km (0.102 R)
• M50: 27,975,101 km (0.102 R)
• M51: 28,578,579 km (0.084 R)
• M52: 28,780,686 km (0.068 R)
• M53: 30,483,558 km (0.084 R)
• M54: 30,758,968 km (0.067 R)
• M55: 32,288,756 km (0.039 R)
• M56: 32,429,078 km (0.107 R)
• M57: 33,062,925 km (0.075 R)
• M58: 33,558,842 km (0.096 R)
• M59: 33,629,901 km (0.117 R)
• M60: 34,414,541 km (0.119 R)
• M61: 35,277,422 km (0.12 R)
• M62: 35,349,678 km (0.114 R)
• M63: 36,731,364 km (0.096 R)
• M64: 36,804,517 km (0.075 R)
• M65: 36,877,820 km (0.097 R)
• M66: 37,834,648 km (0.086 R)
• M67: 38,948,703 km (0.081 R)
• M68: 39,622,342 km (0.081 R)
• M69: 39,772,539 km (0.113 R)
• M70: 42,125,115 km (0.047 R)
• M71: 42,355,196 km (0.071 R)
• M72: 43,125,027 km (0.119 R)
• M73: 43,977,136 km (0.097 R)
• M74: 45,540,733 km (0.08 R)
• M75: 46,013,463 km (0.117 R)
• M76: 47,840,202 km (0.047 R)
• M77: 49,044,316 km (0.111 R)
• M78: 50,258,302 km (0.084 R)
• M79: 52,716,046 km (0.043 R)
• M80: 53,876,177 km (0.093 R)
• M81: 54,292,658 km (0.096 R)
• M82: 55,296,459 km (0.062 R)
• M83: 55,380,384 km (0.069 R)
• M84: 55,548,233 km (0.107 R)
• M85: 55,716,381 km (0.109 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.59 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 577.5

Radius: 7.7

Gravity: 9.74 G

Time & Orbit

Eccentricity (e): 0.181

Orbit Range: 6.22 AU - 8.96 AU

Year: 14183 Days

Day: 21.8 Hours

Environment

Temp: -231 °C

Axial Tilt: 15.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 85,878,649 km

• M1: 115,938 km (0.032 R)
• M2: 334,950 km (0.068 R)
• M3: 392,246 km (0.091 R)
• M4: 733,778 km (0.102 R)
• M5: 1,198,279 km (0.109 R)
• M6: 1,662,182 km (0.106 R)
• M7: 1,714,092 km (0.026 R)
• M8: 1,927,419 km (0.101 R)
• M9: 2,121,148 km (0.098 R)
• M10: 2,292,139 km (0.104 R)
• M11: 2,350,183 km (0.06 R)
• M12: 2,708,918 km (0.047 R)
• M13: 2,926,284 km (0.12 R)
• M14: 3,021,129 km (0.04 R)
• M15: 3,713,618 km (0.096 R)
• M16: 3,782,133 km (0.119 R)
• M17: 4,309,167 km (0.067 R)
• M18: 4,784,439 km (0.065 R)
• M19: 4,971,736 km (0.046 R)
• M20: 5,047,432 km (0.113 R)
• M21: 5,123,278 km (0.066 R)
• M22: 5,314,913 km (0.094 R)
• M23: 5,705,364 km (0.059 R)
• M24: 6,024,306 km (0.111 R)
• M25: 6,638,106 km (0.059 R)
• M26: 6,847,095 km (0.075 R)
• M27: 7,185,934 km (0.079 R)
• M28: 8,235,363 km (0.097 R)
• M29: 8,324,972 km (0.066 R)
• M30: 9,053,514 km (0.098 R)
• M31: 9,238,865 km (0.112 R)
• M32: 9,897,395 km (0.073 R)
• M33: 11,110,634 km (0.102 R)
• M34: 12,165,748 km (0.09 R)
• M35: 13,042,990 km (0.095 R)
• M36: 14,531,937 km (0.037 R)
• M37: 14,640,396 km (0.083 R)
• M38: 15,572,540 km (0.096 R)
• M39: 15,962,093 km (0.117 R)
• M40: 16,018,042 km (0.079 R)
• M41: 16,467,584 km (0.041 R)
• M42: 18,482,667 km (0.054 R)
• M43: 18,894,959 km (0.109 R)
• M44: 19,310,243 km (0.1 R)
• M45: 20,270,960 km (0.088 R)
• M46: 20,513,458 km (0.077 R)
• M47: 21,740,759 km (0.117 R)
• M48: 21,802,842 km (0.039 R)
• M49: 22,676,793 km (0.062 R)
• M50: 23,118,107 km (0.09 R)
• M51: 23,308,096 km (0.101 R)
• M52: 24,330,298 km (0.117 R)
• M53: 25,956,427 km (0.115 R)
• M54: 26,948,860 km (0.088 R)
• M55: 27,282,463 km (0.093 R)
• M56: 28,156,114 km (0.084 R)
• M57: 30,484,306 km (0.049 R)
• M58: 30,762,259 km (0.116 R)
• M59: 33,301,384 km (0.102 R)
• M60: 36,863,758 km (0.053 R)
• M61: 38,802,546 km (0.112 R)
• M62: 38,877,794 km (0.106 R)
• M63: 38,953,042 km (0.066 R)
• M64: 39,254,780 km (0.107 R)
• M65: 39,330,178 km (0.075 R)
• M66: 39,481,421 km (0.097 R)
• M67: 42,390,651 km (0.099 R)
• M68: 42,933,990 km (0.099 R)
• M69: 43,089,722 km (0.071 R)
• M70: 44,341,856 km (0.114 R)
• M71: 44,656,760 km (0.09 R)
• M72: 45,605,958 km (0.064 R)
• M73: 48,899,056 km (0.109 R)
• M74: 49,550,405 km (0.102 R)
• M75: 49,713,766 km (0.119 R)
• M76: 50,450,835 km (0.107 R)
• M77: 54,022,185 km (0.083 R)
• M78: 55,033,167 km (0.106 R)
• M79: 55,202,362 km (0.1 R)
• M80: 55,371,707 km (0.116 R)
• M81: 55,541,052 km (0.084 R)
• M82: 55,625,874 km (0.114 R)
• M83: 56,135,554 km (0.096 R)
• M84: 56,646,879 km (0.085 R)
• M85: 56,903,140 km (0.117 R)

Planet 6 - Ice Giant

Semi-Major Axis: 10.35 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 772.4

Radius: 3.6

Gravity: 59.6 G

Time & Orbit

Eccentricity (e): 0.029

Orbit Range: 10.05 AU - 10.65 AU

Year: 22584 Days

Day: 17.4 Hours

Environment

Temp: -240 °C

Axial Tilt: 31.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 85,878,649 km

• M1: 118,033 km (0.043 R)
• M2: 235,018 km (0.116 R)
• M3: 864,077 km (0.03 R)
• M4: 1,243,757 km (0.096 R)
• M5: 1,274,873 km (0.087 R)
• M6: 2,023,461 km (0.084 R)
• M7: 2,678,101 km (0.107 R)
• M8: 2,799,874 km (0.094 R)
• M9: 3,176,262 km (0.068 R)
• M10: 3,612,789 km (0.06 R)
• M11: 4,208,039 km (0.113 R)
• M12: 4,589,214 km (0.117 R)
• M13: 4,783,990 km (0.066 R)
• M14: 6,328,439 km (0.093 R)
• M15: 6,545,206 km (0.086 R)
• M16: 8,070,057 km (0.115 R)
• M17: 8,245,984 km (0.079 R)
• M18: 8,482,498 km (0.086 R)
• M19: 10,709,712 km (0.085 R)
• M20: 11,162,544 km (0.098 R)
• M21: 11,227,769 km (0.069 R)
• M22: 11,489,864 km (0.096 R)
• M23: 11,820,326 km (0.089 R)
• M24: 12,220,949 km (0.044 R)
• M25: 13,588,274 km (0.092 R)
• M26: 13,797,561 km (0.037 R)
• M27: 14,078,207 km (0.113 R)
• M28: 14,290,037 km (0.067 R)
• M29: 16,986,539 km (0.087 R)
• M30: 17,589,718 km (0.067 R)
• M31: 18,123,333 km (0.09 R)
• M32: 18,972,451 km (0.072 R)
• M33: 21,677,779 km (0.112 R)
• M34: 22,085,732 km (0.087 R)
• M35: 23,575,128 km (0.116 R)
• M36: 24,331,794 km (0.114 R)
• M37: 26,301,550 km (0.093 R)
• M38: 27,525,410 km (0.069 R)
• M39: 27,613,523 km (0.117 R)
• M40: 28,589,200 km (0.082 R)
• M41: 28,767,671 km (0.102 R)
• M42: 29,036,348 km (0.095 R)
• M43: 30,756,574 km (0.052 R)
• M44: 31,582,803 km (0.057 R)
• M45: 32,137,662 km (0.109 R)
• M46: 33,351,050 km (0.118 R)
• M47: 34,864,831 km (0.078 R)
• M48: 34,960,125 km (0.042 R)
• M49: 35,822,257 km (0.099 R)
• M50: 36,885,449 km (0.096 R)
• M51: 37,079,777 km (0.063 R)
• M52: 37,372,091 km (0.054 R)
• M53: 38,155,087 km (0.118 R)
• M54: 39,141,535 km (0.079 R)
• M55: 39,737,533 km (0.092 R)
• M56: 42,049,269 km (0.041 R)
• M57: 42,354,000 km (0.037 R)
• M58: 44,197,943 km (0.105 R)
• M59: 45,337,430 km (0.114 R)
• M60: 45,754,359 km (0.088 R)
• M61: 45,963,198 km (0.102 R)
• M62: 47,328,578 km (0.065 R)
• M63: 47,539,810 km (0.046 R)
• M64: 48,069,386 km (0.113 R)
• M65: 48,175,451 km (0.065 R)
• M66: 50,206,691 km (0.1 R)
• M67: 52,593,375 km (0.06 R)
• M68: 52,921,743 km (0.104 R)
• M69: 54,462,900 km (0.118 R)
• M70: 56,577,765 km (0.076 R)
• M71: 57,927,437 km (0.087 R)
• M72: 58,040,383 km (0.112 R)
• M73: 59,287,581 km (0.087 R)
• M74: 62,386,052 km (0.08 R)
• M75: 68,142,129 km (0.076 R)
• M76: 68,978,082 km (0.114 R)
• M77: 71,264,386 km (0.106 R)
• M78: 74,555,839 km (0.104 R)
• M79: 74,924,598 km (0.096 R)
• M80: 75,293,955 km (0.113 R)
• M81: 76,034,464 km (0.073 R)
• M82: 76,529,633 km (0.115 R)
• M83: 76,777,517 km (0.085 R)
• M84: 76,901,533 km (0.098 R)
• M85: 78,145,889 km (0.096 R)
• M86: 79,396,826 km (0.053 R)
• M87: 81,412,059 km (0.105 R)
• M88: 82,172,016 km (0.104 R)
• M89: 84,210,287 km (0.119 R)
• M90: 84,338,343 km (0.1 R)
• M91: 85,749,948 km (0.061 R)

Kuiper Belt

Range: 30 - 48 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 484 - 12,931 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit