light-year | 1 ly | 2 ly | 3 ly | 4 ly | 5 ly | 6 ly | 7 ly | 8 ly | 9 ly | 10 ly | 11 ly | 12 ly | 13 ly | 14 ly | 15 ly | 16 ly | 17 ly | 18 ly | 19 ly | 20 ly | 21 ly | 22 ly | 23 ly | 24 ly | 25 ly | 26 ly | 27 ly | 28 ly | 29 ly | 30 ly | 31 ly | 32 ly | 33 ly | 34 ly | 35 ly | 36 ly | 37 ly | 38 ly | 39 ly | 40 ly | 41 ly | 42 ly | 43 ly | 44 ly | 45 ly | 46 ly | 47 ly | 48 ly | 49 ly | 50 ly | 51 ly | 52 ly | 53 ly | 54 ly | 55 ly | 56 ly | 57 ly | 58 ly | 59 ly | 60 ly | 61 ly | 62 ly | 63 ly | 64 ly | 65 ly | 66 ly | 67 ly | 68 ly | 69 ly | 70 ly | 71 ly | 72 ly | 73 ly | 74 ly | 75 ly | 76 ly | 77 ly | 78 ly | 79 ly | 80 ly | 81 ly | 82 ly | 83 ly | 84 ly | 85 ly | 86 ly | 87 ly | 88 ly | 89 ly | 90 ly | 91 ly | 92 ly | 93 ly | 94 ly | 95 ly | 96 ly | 97 ly | 98 ly | 99 ly | 100 ly |
meter | 9.4605284048794 × 1015 m | 1.8921056809759 × 1016 m | 2.8381585214638 × 1016 m | 3.7842113619518 × 1016 m | 4.7302642024397 × 1016 m | 5.6763170429276 × 1016 m | 6.6223698834156 × 1016 m | 7.5684227239035 × 1016 m | 8.5144755643915 × 1016 m | 9.4605284048794 × 1016 m | 1.0406581245367 × 1017 m | 1.1352634085855 × 1017 m | 1.2298686926343 × 1017 m | 1.3244739766831 × 1017 m | 1.4190792607319 × 1017 m | 1.5136845447807 × 1017 m | 1.6082898288295 × 1017 m | 1.7028951128783 × 1017 m | 1.7975003969271 × 1017 m | 1.8921056809759 × 1017 m | 1.9867109650247 × 1017 m | 2.0813162490735 × 1017 m | 2.1759215331223 × 1017 m | 2.2705268171711 × 1017 m | 2.3651321012198 × 1017 m | 2.4597373852686 × 1017 m | 2.5543426693174 × 1017 m | 2.6489479533662 × 1017 m | 2.743553237415 × 1017 m | 2.8381585214638 × 1017 m | 2.9327638055126 × 1017 m | 3.0273690895614 × 1017 m | 3.1219743736102 × 1017 m | 3.216579657659 × 1017 m | 3.3111849417078 × 1017 m | 3.4057902257566 × 1017 m | 3.5003955098054 × 1017 m | 3.5950007938542 × 1017 m | 3.689606077903 × 1017 m | 3.7842113619518 × 1017 m | 3.8788166460006 × 1017 m | 3.9734219300493 × 1017 m | 4.0680272140981 × 1017 m | 4.1626324981469 × 1017 m | 4.2572377821957 × 1017 m | 4.3518430662445 × 1017 m | 4.4464483502933 × 1017 m | 4.5410536343421 × 1017 m | 4.6356589183909 × 1017 m | 4.7302642024397 × 1017 m | 4.8248694864885 × 1017 m | 4.9194747705373 × 1017 m | 5.0140800545861 × 1017 m | 5.1086853386349 × 1017 m | 5.2032906226837 × 1017 m | 5.2978959067325 × 1017 m | 5.3925011907813 × 1017 m | 5.4871064748301 × 1017 m | 5.5817117588788 × 1017 m | 5.6763170429276 × 1017 m | 5.7709223269764 × 1017 m | 5.8655276110252 × 1017 m | 5.960132895074 × 1017 m | 6.0547381791228 × 1017 m | 6.1493434631716 × 1017 m | 6.2439487472204 × 1017 m | 6.3385540312692 × 1017 m | 6.433159315318 × 1017 m | 6.5277645993668 × 1017 m | 6.6223698834156 × 1017 m | 6.7169751674644 × 1017 m | 6.8115804515132 × 1017 m | 6.906185735562 × 1017 m | 7.0007910196108 × 1017 m | 7.0953963036595 × 1017 m | 7.1900015877083 × 1017 m | 7.2846068717571 × 1017 m | 7.3792121558059 × 1017 m | 7.4738174398547 × 1017 m | 7.5684227239035 × 1017 m | 7.6630280079523 × 1017 m | 7.7576332920011 × 1017 m | 7.8522385760499 × 1017 m | 7.9468438600987 × 1017 m | 8.0414491441475 × 1017 m | 8.1360544281963 × 1017 m | 8.2306597122451 × 1017 m | 8.3252649962939 × 1017 m | 8.4198702803427 × 1017 m | 8.5144755643915 × 1017 m | 8.6090808484403 × 1017 m | 8.703686132489 × 1017 m | 8.7982914165378 × 1017 m | 8.8928967005866 × 1017 m | 8.9875019846354 × 1017 m | 9.0821072686842 × 1017 m | 9.176712552733 × 1017 m | 9.2713178367818 × 1017 m | 9.3659231208306 × 1017 m | 9.4605284048794 × 1017 m |
The light-year is a unit of length used to express astronomical distances. It is about 9.5 quadrillion metres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word "year", the term light-year is sometimes misinterpreted as a unit of time.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
light-year | ly | ≡ Distance light travels in vacuum in 365.25 days | = 9.4607304725808×1015 m | Science - Astronomy (Length) |
light-years | meters | light-years | meters |
---|---|---|---|
1 | = 9.4605284048794E+15 | 4 | = 3.7842113619518E+16 |
1.5 | = 1.4190792607319E+16 | 4.5 | = 4.2572377821957E+16 |
2 | = 1.8921056809759E+16 | 5 | = 4.7302642024397E+16 |
2.5 | = 2.3651321012198E+16 | 5.5 | = 5.2032906226837E+16 |
3 | = 2.8381585214638E+16 | 6 | = 5.6763170429276E+16 |
The metre (international spelling) or meter (American spelling) (from the Greek noun μέτρον, "measure") is the base unit of length in the International System of Units (SI). The SI unit symbol is m. The metre is defined as the length of the path travelled by light in a vacuum in 1/299 792 458 seconds.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
meter | m | ≡ Distance light travels in 1⁄299792458 of a second in vacuum. | ≡ 1 m | Metric system SI |
meters | light-years | meters | light-years |
---|---|---|---|
1 | = 1.0570234105362E-16 | 4 | = 4.2280936421447E-16 |
1.5 | = 1.5855351158043E-16 | 4.5 | = 4.7566053474128E-16 |
2 | = 2.1140468210724E-16 | 5 | = 5.2851170526809E-16 |
2.5 | = 2.6425585263404E-16 | 5.5 | = 5.813628757949E-16 |
3 | = 3.1710702316085E-16 | 6 | = 6.3421404632171E-16 |
light-years | meters |
---|---|
1 | = 9.4605284048794 × 1015 |
1.0570234105362 × 10-16 | = 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |