Convert astronomical unit to light year
Enter a value below to convert astronomical unit [AU, UA] to light year [ly]. Reverse conversion: Convert light year to astronomical unit.
1 AU, UA = 1.58125074098e-05 ly. To convert astronomical unit to light year, multiply the value by 1.58125074098e-05; to go the other way, divide by it (1 ly = 63241.0770843 AU, UA). Both units measure length and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Astronomical Unit to Light Year: Quick Reference
- 1 AU, UA = 1.58125074098e-05 ly
- 1 ly = 63241.0770843 AU, UA
- 10 AU, UA = 0.000158125074098 ly
- 100 AU, UA = 0.00158125074098 ly
How to Convert Astronomical Unit to Light Year
1 AU, UA = 1.5812507409822e-05 ly
Example: convert 15 AU, UA to ly:
15 AU, UA = 15 × 1.5812507409822e-05 ly = 0.00023718761114733 ly
Astronomical Unit to Light Year Conversion Table
| astronomical unit | light year |
|---|---|
| 1 AU, UA | 1.58125074098e-05 ly |
| 2 AU, UA | 3.16250148196e-05 ly |
| 3 AU, UA | 4.74375222295e-05 ly |
| 5 AU, UA | 7.90625370491e-05 ly |
| 10 AU, UA | 0.000158125074098 ly |
| 20 AU, UA | 0.000316250148196 ly |
| 50 AU, UA | 0.000790625370491 ly |
| 100 AU, UA | 0.00158125074098 ly |
| 500 AU, UA | 0.00790625370491 ly |
| 1000 AU, UA | 0.0158125074098 ly |
Astronomical Unit: Definition and Use
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.
Light Year: Definition and Use
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 to Light Year: Frequently Asked Questions
What is 1 astronomical unit in light year?
1 astronomical unit (AU, UA) = 1.58125074098e-05 light year (ly).
How do you convert astronomical unit to light year?
Multiply the astronomical unit value by 1.58125074098e-05. For example, 25 AU, UA × 1.58125074098e-05 = 0.000395312685246 ly.
What is 10 astronomical unit in light year?
10 AU, UA = 0.000158125074098 ly.
Which unit is larger, the astronomical unit or the light year?
The light year is the larger unit: 1 AU, UA equals only 1.58125074098e-05 ly.