Convert light year to astronomical unit
Please provide values below to convert light year [ly] to astronomical unit [AU, UA], or Convert astronomical unit to light year.
1 ly = 63241.0770843 AU, UA. To convert light year to astronomical unit, multiply the value by 63241.0770843; to go the other way, divide by it (1 AU, UA = 1.58125074098e-05 ly). Both units measure length and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 ly = 63241.0770843 AU, UA
- 1 AU, UA = 1.58125074098e-05 ly
- 10 ly = 632410.770843 AU, UA
- 100 ly = 6324107.70843 AU, UA
How to Convert Light Year to Astronomical Unit
1 ly = 63241.0770842609 AU, UA
Example: convert 15 ly to AU, UA:
15 ly = 15 × 63241.0770842609 AU, UA = 948616.156263914 AU, UA
Light Year to Astronomical Unit Conversion Table
| light year | astronomical unit |
|---|---|
| 1 ly | 63241.0770843 AU, UA |
| 2 ly | 126482.154169 AU, UA |
| 3 ly | 189723.231253 AU, UA |
| 5 ly | 316205.385421 AU, UA |
| 10 ly | 632410.770843 AU, UA |
| 20 ly | 1264821.54169 AU, UA |
| 50 ly | 3162053.85421 AU, UA |
| 100 ly | 6324107.70843 AU, UA |
| 500 ly | 31620538.5421 AU, UA |
| 1000 ly | 63241077.0843 AU, UA |
Light Year
A light-year is the distance that light travels in a vacuum in one Julian year.
History/Origin
The concept of the light-year as a unit of distance in astronomy emerged in the mid-19th century. The first recorded use of the term was in a German astronomical publication in 1851.
Current Use
The light-year is used to express distances to stars and other astronomical objects on a galactic and intergalactic scale, especially in popular science and non-specialist contexts.
Astronomical Unit
The astronomical unit is a unit of length, now defined as exactly 149,597,870,700 meters. It is approximately the average distance between the Earth and the Sun.
History/Origin
Historically, the astronomical unit was the mean Earth-Sun distance. In 2012, the International Astronomical Union (IAU) redefined it as a fixed constant.
Current Use
The astronomical unit is used primarily for measuring distances within the Solar System or around other stars.
Frequently Asked Questions
What is 1 light year in astronomical unit?
1 light year (ly) = 63241.0770843 astronomical unit (AU, UA).
How do you convert light year to astronomical unit?
Multiply the light year value by 63241.0770843. For example, 25 ly × 63241.0770843 = 1581026.92711 AU, UA.
What is 10 light year in astronomical unit?
10 ly = 632410.770843 AU, UA.
Which unit is larger, the light year or the astronomical unit?
The light year is the larger unit: 1 ly = 63241.0770843 AU, UA.