🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.27 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.53 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 495.5

Radius: 13.5

Gravity: 2.72 G

Time & Orbit

Eccentricity (e): 0.216

Orbit Range: 0.42 AU - 0.64 AU

Year: 266 Days

Day: 5.1 Hours

Environment

Temp: -140 °C

Axial Tilt: 34.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (30)

Outer Limit: 55,281,048 km

• M1: 170,093 km (0.052 R)
• M2: 280,496 km (0.102 R)
• M3: 398,379 km (0.107 R)
• M4: 505,940 km (0.117 R)
• M5: 593,904 km (0.113 R)
• M6: 688,449 km (0.106 R)
• M7: 879,336 km (0.118 R)
• M8: 970,441 km (0.114 R)
• M9: 1,152,502 km (0.078 R)
• M10: 1,238,820 km (0.092 R)
• M11: 1,441,974 km (0.119 R)
• M12: 1,555,818 km (0.08 R)
• M13: 1,656,497 km (0.105 R)
• M14: 1,759,570 km (0.095 R)
• M15: 1,856,360 km (0.075 R)
• M16: 2,059,963 km (0.11 R)
• M17: 2,153,312 km (0.087 R)
• M18: 2,289,446 km (0.103 R)
• M19: 2,419,147 km (0.086 R)
• M20: 2,584,752 km (0.067 R)
• M21: 2,700,541 km (0.082 R)
• M22: 2,847,895 km (0.112 R)
• M23: 2,947,676 km (0.071 R)
• M24: 3,043,569 km (0.087 R)
• M25: 3,140,508 km (0.104 R)
• M26: 3,228,172 km (0.067 R)
• M27: 3,469,474 km (0.098 R)
• M28: 3,571,051 km (0.117 R)
• M29: 3,700,603 km (0.118 R)
• M30: 3,815,344 km (0.057 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 724.3

Radius: 9.8

Gravity: 7.54 G

Time & Orbit

Eccentricity (e): 0.243

Orbit Range: 0.73 AU - 1.21 AU

Year: 659 Days

Day: 5 Hours

Environment

Temp: -174 °C

Axial Tilt: 23.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (56)

Outer Limit: 55,281,048 km

• M1: 130,898 km (0.096 R)
• M2: 204,351 km (0.12 R)
• M3: 296,204 km (0.102 R)
• M4: 408,253 km (0.044 R)
• M5: 541,843 km (0.118 R)
• M6: 691,591 km (0.04 R)
• M7: 818,600 km (0.098 R)
• M8: 893,398 km (0.043 R)
• M9: 1,056,311 km (0.073 R)
• M10: 1,168,359 km (0.111 R)
• M11: 1,316,012 km (0.077 R)
• M12: 1,502,860 km (0.077 R)
• M13: 1,650,513 km (0.111 R)
• M14: 1,796,072 km (0.109 R)
• M15: 1,866,832 km (0.116 R)
• M16: 1,960,480 km (0.051 R)
• M17: 2,033,484 km (0.109 R)
• M18: 2,114,865 km (0.119 R)
• M19: 2,182,334 km (0.111 R)
• M20: 2,258,180 km (0.116 R)
• M21: 2,420,494 km (0.025 R)
• M22: 2,483,325 km (0.11 R)
• M23: 2,602,554 km (0.08 R)
• M24: 2,731,956 km (0.088 R)
• M25: 2,797,480 km (0.06 R)
• M26: 2,888,436 km (0.108 R)
• M27: 3,022,625 km (0.068 R)
• M28: 3,124,651 km (0.043 R)
• M29: 3,271,107 km (0.117 R)
• M30: 3,402,155 km (0.077 R)
• M31: 3,535,147 km (0.11 R)
• M32: 3,705,988 km (0.106 R)
• M33: 3,769,567 km (0.069 R)
• M34: 3,944,297 km (0.093 R)
• M35: 4,130,996 km (0.109 R)
• M36: 4,301,537 km (0.05 R)
• M37: 4,532,666 km (0.11 R)
• M38: 4,659,525 km (0.048 R)
• M39: 4,896,937 km (0.1 R)
• M40: 5,199,424 km (0.088 R)
• M41: 5,311,772 km (0.073 R)
• M42: 5,383,728 km (0.111 R)
• M43: 5,445,662 km (0.091 R)
• M44: 5,601,543 km (0.095 R)
• M45: 5,854,213 km (0.099 R)
• M46: 5,992,592 km (0.09 R)
• M47: 6,283,410 km (0.119 R)
• M48: 6,501,972 km (0.074 R)
• M49: 6,579,015 km (0.059 R)
• M50: 6,656,357 km (0.053 R)
• M51: 6,856,669 km (0.066 R)
• M52: 6,957,647 km (0.106 R)
• M53: 7,252,056 km (0.078 R)
• M54: 7,320,572 km (0.107 R)
• M55: 7,585,210 km (0.047 R)
• M56: 7,794,647 km (0.039 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.51 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 688.2

Radius: 10.6

Gravity: 6.12 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 1.25 AU - 1.77 AU

Year: 1281 Days

Day: 10.4 Hours

Environment

Temp: -192 °C

Axial Tilt: 37.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (57)

Outer Limit: 55,281,048 km

• M1: 138,827 km (0.099 R)
• M2: 221,255 km (0.089 R)
• M3: 468,541 km (0.055 R)
• M4: 560,094 km (0.109 R)
• M5: 737,069 km (0.114 R)
• M6: 896,839 km (0.06 R)
• M7: 1,015,171 km (0.088 R)
• M8: 1,162,824 km (0.103 R)
• M9: 1,284,747 km (0.074 R)
• M10: 1,376,899 km (0.101 R)
• M11: 1,445,415 km (0.105 R)
• M12: 1,541,606 km (0.097 R)
• M13: 1,749,996 km (0.062 R)
• M14: 1,958,087 km (0.119 R)
• M15: 2,377,709 km (0.054 R)
• M16: 2,749,010 km (0.076 R)
• M17: 2,969,518 km (0.109 R)
• M18: 3,184,340 km (0.084 R)
• M19: 3,322,718 km (0.059 R)
• M20: 3,510,464 km (0.088 R)
• M21: 3,593,640 km (0.066 R)
• M22: 3,725,735 km (0.106 R)
• M23: 3,847,358 km (0.115 R)
• M24: 4,019,844 km (0.112 R)
• M25: 4,119,477 km (0.099 R)
• M26: 4,334,000 km (0.104 R)
• M27: 4,721,758 km (0.069 R)
• M28: 4,986,546 km (0.069 R)
• M29: 5,161,276 km (0.111 R)
• M30: 5,297,111 km (0.115 R)
• M31: 5,809,933 km (0.03 R)
• M32: 5,880,543 km (0.12 R)
• M33: 6,367,783 km (0.06 R)
• M34: 6,513,641 km (0.114 R)
• M35: 7,107,993 km (0.056 R)
• M36: 7,198,650 km (0.036 R)
• M37: 7,688,732 km (0.079 R)
• M38: 7,844,015 km (0.111 R)
• M39: 7,922,105 km (0.088 R)
• M40: 8,031,910 km (0.112 R)
• M41: 8,158,021 km (0.098 R)
• M42: 8,284,730 km (0.116 R)
• M43: 8,460,059 km (0.066 R)
• M44: 8,781,993 km (0.041 R)
• M45: 9,239,464 km (0.058 R)
• M46: 9,704,713 km (0.061 R)
• M47: 9,771,883 km (0.057 R)
• M48: 10,177,742 km (0.087 R)
• M49: 10,263,012 km (0.04 R)
• M50: 10,710,160 km (0.105 R)
• M51: 10,848,987 km (0.107 R)
• M52: 10,918,700 km (0.076 R)
• M53: 11,198,897 km (0.096 R)
• M54: 11,286,860 km (0.072 R)
• M55: 11,748,519 km (0.065 R)
• M56: 11,855,930 km (0.066 R)
• M57: 12,071,651 km (0.088 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.48 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 930.9

Radius: 14.7

Gravity: 4.31 G

Time & Orbit

Eccentricity (e): 0.022

Orbit Range: 2.43 AU - 2.53 AU

Year: 2696 Days

Day: 14.8 Hours

Environment

Temp: -200 °C

Axial Tilt: 16.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 55,281,048 km

• M1: 183,557 km (0.066 R)
• M2: 399,576 km (0.101 R)
• M3: 530,324 km (0.071 R)
• M4: 680,072 km (0.105 R)
• M5: 836,402 km (0.065 R)
• M6: 1,107,623 km (0.109 R)
• M7: 1,358,648 km (0.046 R)
• M8: 1,472,193 km (0.062 R)
• M9: 1,763,908 km (0.112 R)
• M10: 1,860,848 km (0.113 R)
• M11: 2,342,852 km (0.085 R)
• M12: 2,622,451 km (0.084 R)
• M13: 2,863,902 km (0.083 R)
• M14: 3,012,303 km (0.078 R)
• M15: 3,146,492 km (0.114 R)
• M16: 3,403,651 km (0.114 R)
• M17: 3,847,657 km (0.117 R)
• M18: 4,030,615 km (0.099 R)
• M19: 4,216,566 km (0.096 R)
• M20: 4,577,545 km (0.051 R)
• M21: 4,674,335 km (0.105 R)
• M22: 5,088,123 km (0.1 R)
• M23: 5,188,503 km (0.094 R)
• M24: 5,289,482 km (0.069 R)
• M25: 5,452,394 km (0.108 R)
• M26: 5,596,456 km (0.065 R)
• M27: 5,888,322 km (0.099 R)
• M28: 6,099,853 km (0.12 R)
• M29: 6,400,246 km (0.093 R)
• M30: 6,552,387 km (0.095 R)
• M31: 6,971,261 km (0.097 R)
• M32: 7,376,222 km (0.115 R)
• M33: 7,650,585 km (0.118 R)
• M34: 8,256,606 km (0.091 R)
• M35: 8,351,152 km (0.051 R)
• M36: 8,974,975 km (0.089 R)
• M37: 9,072,363 km (0.068 R)
• M38: 9,341,789 km (0.069 R)
• M39: 9,465,207 km (0.116 R)
• M40: 9,614,057 km (0.071 R)
• M41: 9,888,868 km (0.074 R)
• M42: 10,625,787 km (0.097 R)
• M43: 10,935,904 km (0.098 R)
• M44: 11,433,167 km (0.112 R)
• M45: 11,804,319 km (0.12 R)
• M46: 11,937,910 km (0.118 R)
• M47: 12,045,172 km (0.078 R)
• M48: 12,233,515 km (0.089 R)
• M49: 12,531,514 km (0.093 R)
• M50: 12,667,648 km (0.054 R)
• M51: 12,831,907 km (0.111 R)
• M52: 14,198,932 km (0.053 R)
• M53: 14,512,190 km (0.101 R)
• M54: 15,582,563 km (0.105 R)
• M55: 16,171,829 km (0.089 R)
• M56: 18,136,947 km (0.115 R)
• M57: 18,229,548 km (0.096 R)
• M58: 18,663,382 km (0.105 R)
• M59: 19,100,656 km (0.097 R)
• M60: 19,509,657 km (0.045 R)
• M61: 19,667,782 km (0.111 R)
• M62: 20,240,592 km (0.056 R)
• M63: 20,368,648 km (0.047 R)
• M64: 20,561,180 km (0.06 R)
• M65: 20,786,624 km (0.055 R)
• M66: 21,012,816 km (0.093 R)
• M67: 21,532,968 km (0.103 R)
• M68: 21,860,288 km (0.061 R)
• M69: 21,958,873 km (0.118 R)
• M70: 22,090,370 km (0.053 R)

Planet 5 - Ice Giant

Semi-Major Axis: 7.28 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 135.8

Radius: 7.4

Gravity: 2.48 G

Time & Orbit

Eccentricity (e): 0.135

Orbit Range: 6.3 AU - 8.26 AU

Year: 13558 Days

Day: 23.2 Hours

Environment

Temp: -232 °C

Axial Tilt: 24.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (45)

Outer Limit: 55,281,048 km

• M1: 95,144 km (0.078 R)
• M2: 148,551 km (0.068 R)
• M3: 195,973 km (0.103 R)
• M4: 252,072 km (0.055 R)
• M5: 375,491 km (0.116 R)
• M6: 544,536 km (0.119 R)
• M7: 821,592 km (0.112 R)
• M8: 1,091,915 km (0.113 R)
• M9: 1,637,498 km (0.064 R)
• M10: 1,748,201 km (0.079 R)
• M11: 1,957,937 km (0.1 R)
• M12: 2,318,468 km (0.093 R)
• M13: 3,591,546 km (0.113 R)
• M14: 4,182,308 km (0.116 R)
• M15: 4,962,610 km (0.104 R)
• M16: 5,124,026 km (0.118 R)
• M17: 5,900,290 km (0.104 R)
• M18: 6,535,632 km (0.066 R)
• M19: 7,436,809 km (0.081 R)
• M20: 7,745,879 km (0.098 R)
• M21: 8,059,136 km (0.093 R)
• M22: 9,686,612 km (0.115 R)
• M23: 9,787,441 km (0.087 R)
• M24: 12,822,183 km (0.117 R)
• M25: 12,969,986 km (0.084 R)
• M26: 14,324,894 km (0.101 R)
• M27: 14,941,387 km (0.106 R)
• M28: 15,057,923 km (0.085 R)
• M29: 16,041,080 km (0.105 R)
• M30: 16,440,058 km (0.083 R)
• M31: 16,802,085 km (0.065 R)
• M32: 17,821,146 km (0.082 R)
• M33: 19,493,051 km (0.038 R)
• M34: 19,578,023 km (0.081 R)
• M35: 20,347,704 km (0.102 R)
• M36: 20,953,127 km (0.12 R)
• M37: 21,740,311 km (0.082 R)
• M38: 22,049,081 km (0.117 R)
• M39: 22,359,347 km (0.073 R)
• M40: 23,569,145 km (0.116 R)
• M41: 26,992,692 km (0.062 R)
• M42: 27,610,082 km (0.09 R)
• M43: 28,520,535 km (0.047 R)
• M44: 33,218,806 km (0.078 R)
• M45: 33,370,947 km (0.085 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.74 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 422.5

Radius: 5.7

Gravity: 13 G

Time & Orbit

Eccentricity (e): 0.025

Orbit Range: 7.55 AU - 7.93 AU

Year: 14864 Days

Day: 22.4 Hours

Environment

Temp: -238 °C

Axial Tilt: 21.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (96)

Outer Limit: 55,281,048 km

• M1: 89,609 km (0.105 R)
• M2: 220,956 km (0.075 R)
• M3: 418,425 km (0.094 R)
• M4: 544,087 km (0.1 R)
• M5: 950,395 km (0.053 R)
• M6: 1,249,292 km (0.084 R)
• M7: 1,294,321 km (0.108 R)
• M8: 1,386,024 km (0.079 R)
• M9: 1,723,966 km (0.087 R)
• M10: 1,774,380 km (0.078 R)
• M11: 2,033,484 km (0.116 R)
• M12: 2,194,750 km (0.025 R)
• M13: 2,304,555 km (0.11 R)
• M14: 2,360,206 km (0.075 R)
• M15: 2,472,703 km (0.1 R)
• M16: 2,762,025 km (0.09 R)
• M17: 3,660,211 km (0.084 R)
• M18: 4,225,392 km (0.114 R)
• M19: 4,328,016 km (0.039 R)
• M20: 4,889,008 km (0.068 R)
• M21: 5,287,836 km (0.053 R)
• M22: 5,435,489 km (0.096 R)
• M23: 6,039,565 km (0.098 R)
• M24: 6,155,204 km (0.108 R)
• M25: 6,388,727 km (0.055 R)
• M26: 7,557,834 km (0.11 R)
• M27: 8,018,147 km (0.034 R)
• M28: 8,401,716 km (0.116 R)
• M29: 9,677,486 km (0.06 R)
• M30: 10,453,151 km (0.099 R)
• M31: 10,778,377 km (0.054 R)
• M32: 10,965,674 km (0.101 R)
• M33: 11,725,481 km (0.117 R)
• M34: 11,918,163 km (0.058 R)
• M35: 13,145,763 km (0.075 R)
• M36: 13,546,985 km (0.047 R)
• M37: 13,698,527 km (0.118 R)
• M38: 13,850,519 km (0.087 R)
• M39: 14,156,447 km (0.042 R)
• M40: 15,665,739 km (0.056 R)
• M41: 15,824,762 km (0.112 R)
• M42: 16,037,640 km (0.104 R)
• M43: 16,091,046 km (0.12 R)
• M44: 16,251,565 km (0.111 R)
• M45: 16,305,121 km (0.099 R)
• M46: 16,574,098 km (0.099 R)
• M47: 16,681,958 km (0.115 R)
• M48: 17,170,844 km (0.074 R)
• M49: 17,499,361 km (0.096 R)
• M50: 19,684,537 km (0.098 R)
• M51: 20,085,758 km (0.079 R)
• M52: 21,129,951 km (0.089 R)
• M53: 21,481,805 km (0.102 R)
• M54: 24,243,831 km (0.115 R)
• M55: 25,230,429 km (0.04 R)
• M56: 25,916,335 km (0.048 R)
• M57: 27,178,941 km (0.086 R)
• M58: 28,203,537 km (0.096 R)
• M59: 28,785,323 km (0.059 R)
• M60: 29,240,549 km (0.071 R)
• M61: 29,436,373 km (0.077 R)
• M62: 29,829,367 km (0.109 R)
• M63: 30,026,537 km (0.045 R)
• M64: 30,158,183 km (0.092 R)
• M65: 30,488,196 km (0.119 R)
• M66: 32,156,212 km (0.116 R)
• M67: 32,291,000 km (0.052 R)
• M68: 32,628,492 km (0.083 R)
• M69: 33,239,151 km (0.071 R)
• M70: 34,540,802 km (0.12 R)
• M71: 34,747,696 km (0.107 R)
• M72: 35,093,716 km (0.115 R)
• M73: 35,510,346 km (0.025 R)
• M74: 35,928,621 km (0.069 R)
• M75: 36,348,692 km (0.06 R)
• M76: 38,472,533 km (0.072 R)
• M77: 39,261,363 km (0.096 R)
• M78: 41,733,019 km (0.102 R)
• M79: 42,248,234 km (0.037 R)
• M80: 42,321,986 km (0.114 R)
• M81: 42,765,394 km (0.028 R)
• M82: 42,987,696 km (0.082 R)
• M83: 43,136,097 km (0.071 R)
• M84: 43,507,848 km (0.056 R)
• M85: 44,779,879 km (0.108 R)
• M86: 44,930,374 km (0.1 R)
• M87: 45,005,622 km (0.086 R)
• M88: 45,533,852 km (0.108 R)
• M89: 45,760,792 km (0.118 R)
• M90: 46,215,869 km (0.115 R)
• M91: 47,054,215 km (0.117 R)
• M92: 48,051,434 km (0.063 R)
• M93: 49,443,592 km (0.098 R)
• M94: 49,754,756 km (0.085 R)
• M95: 50,300,938 km (0.116 R)
• M96: 52,188,264 km (0.083 R)

Planet 7 - Ice Giant

Semi-Major Axis: 9.61 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 248.5

Radius: 7.6

Gravity: 4.3 G

Time & Orbit

Eccentricity (e): 0.19

Orbit Range: 7.78 AU - 11.44 AU

Year: 20563 Days

Day: 20.2 Hours

Environment

Temp: -230 °C

Axial Tilt: 4.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (68)

Outer Limit: 55,281,048 km

• M1: 176,376 km (0.069 R)
• M2: 536,009 km (0.047 R)
• M3: 674,836 km (0.072 R)
• M4: 905,516 km (0.108 R)
• M5: 1,865,934 km (0.098 R)
• M6: 2,359,906 km (0.113 R)
• M7: 3,078,724 km (0.087 R)
• M8: 3,236,700 km (0.072 R)
• M9: 3,397,218 km (0.068 R)
• M10: 3,659,613 km (0.09 R)
• M11: 4,031,214 km (0.091 R)
• M12: 4,238,856 km (0.073 R)
• M13: 4,309,017 km (0.108 R)
• M14: 4,485,842 km (0.119 R)
• M15: 5,104,728 km (0.106 R)
• M16: 6,102,546 km (0.08 R)
• M17: 6,869,085 km (0.082 R)
• M18: 6,951,514 km (0.115 R)
• M19: 7,410,779 km (0.076 R)
• M20: 8,009,620 km (0.076 R)
• M21: 8,446,894 km (0.104 R)
• M22: 9,344,481 km (0.078 R)
• M23: 11,374,973 km (0.032 R)
• M24: 11,423,742 km (0.081 R)
• M25: 11,965,137 km (0.1 R)
• M26: 12,767,580 km (0.061 R)
• M27: 12,818,294 km (0.105 R)
• M28: 15,438,799 km (0.112 R)
• M29: 16,146,547 km (0.101 R)
• M30: 17,032,017 km (0.04 R)
• M31: 19,023,464 km (0.089 R)
• M32: 19,255,789 km (0.044 R)
• M33: 20,431,030 km (0.088 R)
• M34: 21,629,459 km (0.073 R)
• M35: 23,159,396 km (0.062 R)
• M36: 24,219,446 km (0.097 R)
• M37: 26,580,998 km (0.069 R)
• M38: 26,840,700 km (0.085 R)
• M39: 27,428,022 km (0.09 R)
• M40: 27,493,545 km (0.074 R)
• M41: 29,416,177 km (0.081 R)
• M42: 31,039,913 km (0.115 R)
• M43: 31,108,279 km (0.091 R)
• M44: 33,180,060 km (0.096 R)
• M45: 33,319,635 km (0.092 R)
• M46: 33,880,477 km (0.071 R)
• M47: 34,303,091 km (0.114 R)
• M48: 34,727,500 km (0.073 R)
• M49: 34,798,260 km (0.11 R)
• M50: 36,010,900 km (0.078 R)
• M51: 37,819,239 km (0.051 R)
• M52: 39,879,352 km (0.09 R)
• M53: 40,325,452 km (0.085 R)
• M54: 40,698,550 km (0.093 R)
• M55: 41,297,839 km (0.113 R)
• M56: 42,051,213 km (0.079 R)
• M57: 42,884,922 km (0.091 R)
• M58: 44,800,224 km (0.087 R)
• M59: 48,554,981 km (0.117 R)
• M60: 48,634,268 km (0.086 R)
• M61: 50,309,315 km (0.119 R)
• M62: 50,710,836 km (0.103 R)
• M63: 50,791,319 km (0.104 R)
• M64: 51,032,920 km (0.08 R)
• M65: 52,979,488 km (0.103 R)
• M66: 53,224,529 km (0.099 R)
• M67: 53,715,659 km (0.055 R)
• M68: 54,372,992 km (0.104 R)

Kuiper Belt

Range: 30 - 59 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 364 - 20,099 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit