🌌 Stone's Star System Generator

Planet 1 - Gas Giant

Semi-Major Axis: 5.36 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 569.1

Radius: 12.2

Gravity: 3.82 G

Time & Orbit

Eccentricity (e): 0.094

Orbit Range: 4.86 AU - 5.86 AU

Year: 8417 Days

Day: 9.5 Hours

Environment

Temp: -223 °C

Axial Tilt: 20 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 60,035,649 km

• M1: 626,217 km (0.101 R)
• M2: 784,491 km (0.112 R)
• M3: 1,360,593 km (0.098 R)
• M4: 1,651,710 km (0.11 R)
• M5: 1,856,958 km (0.032 R)
• M6: 2,453,255 km (0.075 R)
• M7: 3,081,267 km (0.078 R)
• M8: 3,258,840 km (0.075 R)
• M9: 3,597,530 km (0.038 R)
• M10: 3,677,415 km (0.095 R)
• M11: 4,309,316 km (0.046 R)
• M12: 4,710,538 km (0.085 R)
• M13: 5,365,477 km (0.109 R)
• M14: 5,734,834 km (0.047 R)
• M15: 6,144,433 km (0.118 R)
• M16: 6,304,503 km (0.114 R)
• M17: 6,793,090 km (0.115 R)
• M18: 7,058,776 km (0.102 R)
• M19: 7,703,393 km (0.086 R)
• M20: 7,806,914 km (0.077 R)
• M21: 7,980,448 km (0.117 R)
• M22: 8,260,944 km (0.109 R)
• M23: 8,976,171 km (0.101 R)
• M24: 9,562,745 km (0.087 R)
• M25: 9,973,241 km (0.116 R)
• M26: 10,161,735 km (0.097 R)
• M27: 10,351,425 km (0.113 R)
• M28: 10,465,867 km (0.085 R)
• M29: 10,888,780 km (0.119 R)
• M30: 11,161,048 km (0.088 R)
• M31: 11,751,810 km (0.107 R)
• M32: 11,950,925 km (0.074 R)
• M33: 12,151,237 km (0.097 R)
• M34: 12,231,720 km (0.08 R)
• M35: 12,555,300 km (0.073 R)
• M36: 12,718,063 km (0.056 R)
• M37: 13,751,784 km (0.053 R)
• M38: 13,877,746 km (0.105 R)
• M39: 15,461,389 km (0.067 R)
• M40: 15,592,287 km (0.1 R)
• M41: 16,075,488 km (0.059 R)
• M42: 16,252,313 km (0.03 R)
• M43: 16,385,455 km (0.085 R)
• M44: 17,327,473 km (0.035 R)
• M45: 18,936,398 km (0.114 R)
• M46: 19,029,747 km (0.12 R)
• M47: 19,170,070 km (0.039 R)
• M48: 20,544,575 km (0.087 R)
• M49: 22,591,074 km (0.066 R)
• M50: 23,087,888 km (0.111 R)
• M51: 23,638,558 km (0.095 R)
• M52: 23,839,917 km (0.116 R)
• M53: 24,143,002 km (0.105 R)
• M54: 24,447,284 km (0.076 R)
• M55: 24,855,088 km (0.071 R)
• M56: 24,957,263 km (0.044 R)
• M57: 25,316,448 km (0.117 R)
• M58: 26,143,724 km (0.092 R)
• M59: 27,718,690 km (0.074 R)
• M60: 29,000,894 km (0.101 R)
• M61: 29,216,315 km (0.114 R)
• M62: 29,975,075 km (0.12 R)
• M63: 30,795,021 km (0.097 R)
• M64: 30,960,027 km (0.067 R)
• M65: 32,401,403 km (0.082 R)
• M66: 33,864,620 km (0.051 R)
• M67: 34,947,409 km (0.059 R)
• M68: 35,579,610 km (0.112 R)
• M69: 37,439,859 km (0.093 R)
• M70: 38,618,541 km (0.054 R)
• M71: 38,974,584 km (0.102 R)
• M72: 39,510,593 km (0.039 R)
• M73: 39,689,811 km (0.118 R)

Planet 2 - Ice Giant

Semi-Major Axis: 5.66 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 606.2

Radius: 3.3

Gravity: 55.67 G

Time & Orbit

Eccentricity (e): 0.17

Orbit Range: 4.7 AU - 6.62 AU

Year: 9133 Days

Day: 16.4 Hours

Environment

Temp: -223 °C

Axial Tilt: 28.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (94)

Outer Limit: 60,035,649 km

• M1: 44,879 km (0.058 R)
• M2: 105,167 km (0.119 R)
• M3: 191,934 km (0.08 R)
• M4: 222,452 km (0.092 R)
• M5: 243,845 km (0.115 R)
• M6: 300,542 km (0.11 R)
• M7: 324,478 km (0.075 R)
• M8: 842,535 km (0.089 R)
• M9: 1,020,257 km (0.083 R)
• M10: 1,132,605 km (0.052 R)
• M11: 1,288,337 km (0.078 R)
• M12: 1,389,166 km (0.101 R)
• M13: 1,471,744 km (0.096 R)
• M14: 1,685,070 km (0.081 R)
• M15: 1,750,893 km (0.115 R)
• M16: 2,259,676 km (0.083 R)
• M17: 2,332,380 km (0.068 R)
• M18: 2,455,350 km (0.067 R)
• M19: 2,480,183 km (0.109 R)
• M20: 2,836,824 km (0.102 R)
• M21: 3,625,355 km (0.046 R)
• M22: 3,796,495 km (0.037 R)
• M23: 4,205,944 km (0.084 R)
• M24: 4,537,453 km (0.045 R)
• M25: 5,193,290 km (0.119 R)
• M26: 5,225,304 km (0.081 R)
• M27: 5,386,122 km (0.073 R)
• M28: 5,418,435 km (0.058 R)
• M29: 5,745,605 km (0.07 R)
• M30: 6,180,486 km (0.086 R)
• M31: 6,799,822 km (0.074 R)
• M32: 6,904,989 km (0.113 R)
• M33: 7,046,060 km (0.051 R)
• M34: 7,259,386 km (0.103 R)
• M35: 7,692,472 km (0.077 R)
• M36: 9,040,947 km (0.079 R)
• M37: 9,702,619 km (0.104 R)
• M38: 9,741,963 km (0.104 R)
• M39: 9,939,881 km (0.119 R)
• M40: 11,737,000 km (0.075 R)
• M41: 13,675,789 km (0.097 R)
• M42: 13,764,201 km (0.087 R)
• M43: 13,852,763 km (0.088 R)
• M44: 13,941,624 km (0.094 R)
• M45: 14,343,743 km (0.1 R)
• M46: 14,840,258 km (0.067 R)
• M47: 15,159,051 km (0.025 R)
• M48: 15,711,068 km (0.092 R)
• M49: 16,645,456 km (0.049 R)
• M50: 16,976,815 km (0.086 R)
• M51: 17,742,158 km (0.031 R)
• M52: 18,032,079 km (0.103 R)
• M53: 18,862,048 km (0.116 R)
• M54: 18,911,265 km (0.053 R)
• M55: 19,904,296 km (0.045 R)
• M56: 20,205,436 km (0.094 R)
• M57: 20,812,355 km (0.115 R)
• M58: 21,067,120 km (0.073 R)
• M59: 21,220,308 km (0.119 R)
• M60: 21,630,955 km (0.11 R)
• M61: 21,837,250 km (0.098 R)
• M62: 22,199,726 km (0.049 R)
• M63: 22,564,296 km (0.081 R)
• M64: 22,825,793 km (0.105 R)
• M65: 23,088,487 km (0.092 R)
• M66: 23,616,717 km (0.119 R)
• M67: 24,148,836 km (0.078 R)
• M68: 24,362,761 km (0.057 R)
• M69: 24,631,140 km (0.115 R)
• M70: 25,062,580 km (0.097 R)
• M71: 26,979,078 km (0.106 R)
• M72: 27,312,233 km (0.085 R)
• M73: 29,969,540 km (0.066 R)
• M74: 30,372,257 km (0.104 R)
• M75: 30,603,236 km (0.076 R)
• M76: 30,776,770 km (0.08 R)
• M77: 31,825,152 km (0.088 R)
• M78: 31,883,794 km (0.096 R)
• M79: 32,001,079 km (0.076 R)
• M80: 32,353,831 km (0.07 R)
• M81: 33,063,074 km (0.101 R)
• M82: 35,160,885 km (0.051 R)
• M83: 35,342,796 km (0.115 R)
• M84: 36,256,540 km (0.088 R)
• M85: 36,808,406 km (0.114 R)
• M86: 37,054,645 km (0.084 R)
• M87: 39,106,679 km (0.09 R)
• M88: 39,295,022 km (0.101 R)
• M89: 39,861,998 km (0.086 R)
• M90: 39,988,259 km (0.054 R)
• M91: 40,431,517 km (0.066 R)
• M92: 41,259,093 km (0.08 R)
• M93: 42,349,661 km (0.074 R)
• M94: 42,478,615 km (0.104 R)

Planet 3 - Ice Giant

Semi-Major Axis: 6.87 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 858.7

Radius: 3.5

Gravity: 70.1 G

Time & Orbit

Eccentricity (e): 0.208

Orbit Range: 5.44 AU - 8.3 AU

Year: 12213 Days

Day: 23 Hours

Environment

Temp: -239 °C

Axial Tilt: 37.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 60,035,649 km

• M1: 111,600 km (0.11 R)
• M2: 588,219 km (0.106 R)
• M3: 889,210 km (0.08 R)
• M4: 1,183,618 km (0.072 R)
• M5: 1,429,108 km (0.029 R)
• M6: 1,454,540 km (0.089 R)
• M7: 1,636,750 km (0.106 R)
• M8: 1,881,642 km (0.095 R)
• M9: 1,937,592 km (0.03 R)
• M10: 2,108,881 km (0.075 R)
• M11: 3,437,460 km (0.101 R)
• M12: 4,034,505 km (0.079 R)
• M13: 4,216,117 km (0.113 R)
• M14: 4,700,963 km (0.111 R)
• M15: 5,321,346 km (0.054 R)
• M16: 5,440,575 km (0.108 R)
• M17: 5,480,518 km (0.11 R)
• M18: 6,008,449 km (0.078 R)
• M19: 6,257,529 km (0.113 R)
• M20: 7,686,638 km (0.103 R)
• M21: 7,731,517 km (0.085 R)
• M22: 8,322,130 km (0.106 R)
• M23: 9,739,569 km (0.102 R)
• M24: 10,575,373 km (0.088 R)
• M25: 10,825,500 km (0.077 R)
• M26: 11,587,552 km (0.081 R)
• M27: 11,793,698 km (0.064 R)
• M28: 11,897,219 km (0.077 R)
• M29: 12,577,591 km (0.108 R)
• M30: 12,736,314 km (0.083 R)
• M31: 12,842,528 km (0.114 R)
• M32: 12,895,785 km (0.115 R)
• M33: 13,002,449 km (0.043 R)
• M34: 13,216,523 km (0.088 R)
• M35: 14,139,841 km (0.045 R)
• M36: 16,740,151 km (0.11 R)
• M37: 16,856,538 km (0.093 R)
• M38: 16,914,882 km (0.086 R)
• M39: 17,148,554 km (0.12 R)
• M40: 17,442,364 km (0.06 R)
• M41: 18,273,679 km (0.094 R)
• M42: 18,513,484 km (0.087 R)
• M43: 18,875,212 km (0.047 R)
• M44: 20,407,543 km (0.029 R)
• M45: 21,219,860 km (0.103 R)
• M46: 21,661,772 km (0.12 R)
• M47: 21,979,218 km (0.031 R)
• M48: 22,234,283 km (0.115 R)
• M49: 22,298,161 km (0.109 R)
• M50: 22,876,207 km (0.113 R)
• M51: 23,459,040 km (0.094 R)
• M52: 23,654,565 km (0.106 R)
• M53: 23,850,389 km (0.097 R)
• M54: 24,771,911 km (0.038 R)
• M55: 26,175,887 km (0.069 R)
• M56: 26,378,593 km (0.112 R)
• M57: 26,446,211 km (0.065 R)
• M58: 26,581,746 km (0.112 R)
• M59: 27,399,598 km (0.071 R)
• M60: 28,364,355 km (0.116 R)
• M61: 28,711,571 km (0.084 R)
• M62: 29,480,355 km (0.113 R)
• M63: 30,397,539 km (0.086 R)
• M64: 31,826,947 km (0.108 R)
• M65: 35,944,030 km (0.039 R)
• M66: 36,319,670 km (0.057 R)
• M67: 37,987,986 km (0.109 R)
• M68: 38,064,430 km (0.115 R)
• M69: 39,062,547 km (0.11 R)
• M70: 41,084,662 km (0.111 R)
• M71: 42,425,059 km (0.05 R)
• M72: 42,742,505 km (0.1 R)
• M73: 42,981,114 km (0.105 R)
• M74: 43,379,792 km (0.113 R)
• M75: 43,619,598 km (0.077 R)
• M76: 44,100,405 km (0.04 R)
• M77: 44,261,073 km (0.111 R)
• M78: 46,041,587 km (0.1 R)
• M79: 46,940,521 km (0.077 R)
• M80: 47,104,630 km (0.099 R)
• M81: 47,927,867 km (0.038 R)
• M82: 48,010,445 km (0.104 R)
• M83: 49,171,623 km (0.106 R)
• M84: 49,338,126 km (0.1 R)
• M85: 50,341,927 km (0.107 R)
• M86: 51,606,029 km (0.097 R)
• M87: 52,454,549 km (0.118 R)
• M88: 52,624,791 km (0.114 R)
• M89: 53,907,593 km (0.053 R)
• M90: 55,114,100 km (0.112 R)
• M91: 55,633,952 km (0.074 R)
• M92: 56,329,433 km (0.115 R)
• M93: 56,591,079 km (0.047 R)
• M94: 57,905,147 km (0.113 R)
• M95: 58,786,727 km (0.071 R)
• M96: 59,051,964 km (0.11 R)

Planet 4 - Ice Giant

Semi-Major Axis: 6.94 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 583.7

Radius: 4

Gravity: 36.48 G

Time & Orbit

Eccentricity (e): 0.169

Orbit Range: 5.77 AU - 8.11 AU

Year: 12400 Days

Day: 19.6 Hours

Environment

Temp: -233 °C

Axial Tilt: 31.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (93)

Outer Limit: 60,035,649 km

• M1: 62,981 km (0.085 R)
• M2: 110,254 km (0.1 R)
• M3: 186,997 km (0.088 R)
• M4: 282,291 km (0.118 R)
• M5: 349,760 km (0.091 R)
• M6: 378,333 km (0.116 R)
• M7: 653,294 km (0.1 R)
• M8: 839,244 km (0.072 R)
• M9: 878,289 km (0.104 R)
• M10: 1,020,257 km (0.091 R)
• M11: 1,062,145 km (0.094 R)
• M12: 1,987,557 km (0.108 R)
• M13: 2,337,766 km (0.109 R)
• M14: 2,393,416 km (0.077 R)
• M15: 2,421,391 km (0.107 R)
• M16: 2,449,516 km (0.102 R)
• M17: 2,505,914 km (0.064 R)
• M18: 2,591,484 km (0.063 R)
• M19: 3,155,019 km (0.086 R)
• M20: 3,278,437 km (0.079 R)
• M21: 3,309,554 km (0.035 R)
• M22: 3,372,086 km (0.111 R)
• M23: 4,185,599 km (0.089 R)
• M24: 5,943,224 km (0.106 R)
• M25: 6,482,375 km (0.1 R)
• M26: 6,996,842 km (0.082 R)
• M27: 7,647,892 km (0.094 R)
• M28: 8,190,932 km (0.078 R)
• M29: 8,703,305 km (0.094 R)
• M30: 9,490,938 km (0.114 R)
• M31: 9,713,839 km (0.03 R)
• M32: 10,073,921 km (0.108 R)
• M33: 10,576,270 km (0.105 R)
• M34: 10,622,346 km (0.101 R)
• M35: 10,900,150 km (0.075 R)
• M36: 11,605,055 km (0.064 R)
• M37: 12,763,242 km (0.11 R)
• M38: 12,959,813 km (0.099 R)
• M39: 13,058,548 km (0.086 R)
• M40: 15,187,625 km (0.08 R)
• M41: 16,611,946 km (0.108 R)
• M42: 18,631,966 km (0.072 R)
• M43: 18,966,766 km (0.104 R)
• M44: 19,812,443 km (0.116 R)
• M45: 19,926,137 km (0.119 R)
• M46: 20,612,791 km (0.118 R)
• M47: 20,670,387 km (0.076 R)
• M48: 22,837,910 km (0.103 R)
• M49: 23,556,279 km (0.105 R)
• M50: 23,857,719 km (0.039 R)
• M51: 23,918,156 km (0.113 R)
• M52: 24,039,181 km (0.095 R)
• M53: 24,464,488 km (0.03 R)
• M54: 24,769,817 km (0.108 R)
• M55: 25,199,462 km (0.099 R)
• M56: 25,941,468 km (0.086 R)
• M57: 26,565,440 km (0.054 R)
• M58: 28,082,811 km (0.068 R)
• M59: 28,594,735 km (0.085 R)
• M60: 30,345,479 km (0.107 R)
• M61: 31,266,703 km (0.052 R)
• M62: 31,730,905 km (0.117 R)
• M63: 31,863,898 km (0.107 R)
• M64: 31,930,469 km (0.119 R)
• M65: 35,042,703 km (0.084 R)
• M66: 35,662,936 km (0.117 R)
• M67: 35,870,428 km (0.091 R)
• M68: 36,425,735 km (0.099 R)
• M69: 37,545,026 km (0.104 R)
• M70: 37,756,109 km (0.101 R)
• M71: 39,102,340 km (0.05 R)
• M72: 39,244,907 km (0.078 R)
• M73: 39,459,131 km (0.111 R)
• M74: 40,608,342 km (0.084 R)
• M75: 41,768,473 km (0.103 R)
• M76: 42,060,189 km (0.099 R)
• M77: 42,499,109 km (0.049 R)
• M78: 42,572,412 km (0.117 R)
• M79: 43,455,189 km (0.055 R)
• M80: 43,824,846 km (0.097 R)
• M81: 43,898,897 km (0.073 R)
• M82: 45,089,247 km (0.119 R)
• M83: 45,238,845 km (0.102 R)
• M84: 45,763,634 km (0.058 R)
• M85: 46,667,804 km (0.112 R)
• M86: 47,197,979 km (0.108 R)
• M87: 47,349,820 km (0.109 R)
• M88: 48,111,423 km (0.053 R)
• M89: 48,646,984 km (0.083 R)
• M90: 49,338,575 km (0.107 R)
• M91: 49,724,088 km (0.044 R)
• M92: 50,343,124 km (0.109 R)
• M93: 52,136,803 km (0.101 R)

Planet 5 - Ice Giant

Semi-Major Axis: 6.94 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 875.3

Radius: 5.4

Gravity: 30.02 G

Time & Orbit

Eccentricity (e): 0.208

Orbit Range: 5.5 AU - 8.38 AU

Year: 12400 Days

Day: 19.2 Hours

Environment

Temp: -226 °C

Axial Tilt: 10.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (92)

Outer Limit: 60,035,649 km

• M1: 88,412 km (0.07 R)
• M2: 156,031 km (0.116 R)
• M3: 459,864 km (0.115 R)
• M4: 601,832 km (0.036 R)
• M5: 778,208 km (0.117 R)
• M6: 904,768 km (0.05 R)
• M7: 1,348,475 km (0.11 R)
• M8: 1,424,022 km (0.064 R)
• M9: 1,579,604 km (0.088 R)
• M10: 2,049,491 km (0.112 R)
• M11: 2,405,833 km (0.086 R)
• M12: 2,467,168 km (0.084 R)
• M13: 2,845,651 km (0.076 R)
• M14: 4,270,570 km (0.082 R)
• M15: 4,916,534 km (0.086 R)
• M16: 4,994,475 km (0.067 R)
• M17: 5,151,851 km (0.094 R)
• M18: 6,552,985 km (0.047 R)
• M19: 7,698,606 km (0.067 R)
• M20: 7,834,740 km (0.056 R)
• M21: 7,880,217 km (0.1 R)
• M22: 8,480,554 km (0.076 R)
• M23: 9,675,691 km (0.063 R)
• M24: 9,724,610 km (0.045 R)
• M25: 10,168,317 km (0.083 R)
• M26: 10,367,731 km (0.112 R)
• M27: 11,746,874 km (0.04 R)
• M28: 11,799,083 km (0.103 R)
• M29: 12,061,179 km (0.1 R)
• M30: 12,272,112 km (0.08 R)
• M31: 12,484,391 km (0.101 R)
• M32: 13,020,400 km (0.076 R)
• M33: 13,074,405 km (0.075 R)
• M34: 13,128,410 km (0.099 R)
• M35: 13,454,533 km (0.109 R)
• M36: 13,509,137 km (0.1 R)
• M37: 13,673,395 km (0.097 R)
• M38: 13,948,655 km (0.108 R)
• M39: 15,011,099 km (0.114 R)
• M40: 16,273,556 km (0.114 R)
• M41: 17,331,661 km (0.044 R)
• M42: 18,109,421 km (0.111 R)
• M43: 18,169,858 km (0.092 R)
• M44: 18,351,171 km (0.059 R)
• M45: 18,654,705 km (0.06 R)
• M46: 19,082,405 km (0.087 R)
• M47: 19,947,679 km (0.111 R)
• M48: 20,510,616 km (0.07 R)
• M49: 20,762,389 km (0.1 R)
• M50: 21,269,227 km (0.106 R)
• M51: 22,101,440 km (0.04 R)
• M52: 22,748,899 km (0.063 R)
• M53: 23,402,493 km (0.073 R)
• M54: 23,665,635 km (0.04 R)
• M55: 23,995,947 km (0.093 R)
• M56: 24,194,912 km (0.096 R)
• M57: 25,063,328 km (0.104 R)
• M58: 25,738,314 km (0.117 R)
• M59: 27,037,122 km (0.089 R)
• M60: 27,244,166 km (0.118 R)
• M61: 27,451,658 km (0.09 R)
• M62: 27,868,288 km (0.05 R)
• M63: 29,201,504 km (0.089 R)
• M64: 30,987,105 km (0.067 R)
• M65: 31,203,872 km (0.106 R)
• M66: 32,221,437 km (0.101 R)
• M67: 32,881,462 km (0.06 R)
• M68: 36,399,406 km (0.114 R)
• M69: 37,393,484 km (0.113 R)
• M70: 37,701,057 km (0.066 R)
• M71: 39,173,698 km (0.075 R)
• M72: 42,255,115 km (0.105 R)
• M73: 42,816,257 km (0.106 R)
• M74: 43,299,308 km (0.1 R)
• M75: 44,270,797 km (0.097 R)
• M76: 45,331,296 km (0.051 R)
• M77: 46,565,479 km (0.056 R)
• M78: 47,145,171 km (0.118 R)
• M79: 48,227,960 km (0.094 R)
• M80: 48,646,684 km (0.074 R)
• M81: 49,318,977 km (0.076 R)
• M82: 49,909,889 km (0.094 R)
• M83: 50,672,988 km (0.093 R)
• M84: 50,757,959 km (0.112 R)
• M85: 51,013,323 km (0.085 R)
• M86: 51,269,135 km (0.078 R)
• M87: 52,382,592 km (0.051 R)
• M88: 52,726,667 km (0.112 R)
• M89: 56,033,678 km (0.079 R)
• M90: 56,473,795 km (0.112 R)
• M91: 56,738,433 km (0.08 R)
• M92: 58,334,642 km (0.091 R)

Kuiper Belt

Range: 30 - 49 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 318 - 19,780 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit