A light-year (or light year, abbreviation: ly) is a unit of length used informally to express astronomical distances. It is well over 9 trillion kilometres (or about 6 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. Because it includes the word year, the term light-year is sometimes misinterpreted as a unit of time.
The light-year is most often used when expressing distances to stars and other distances on a galactic scale, especially in non-specialist and popular science publications. The unit usually used in professional astrometry is the parsec (symbol: pc, approximately 3.26 light-years; the distance at which one astronomical unit subtends an angle of one second of arc).
As defined by the IAU, the light-year is the product of the Julian year (365.25 days as opposed to the 365.2425-day Gregorian year) and the speed of light (7008299792458000000♠299792458 m/s). Both these values are included in the IAU (1976) System of Astronomical Constants, used since 1984. From this the following conversions can be derived. The internationally recognized abbreviation for light-year is "l.y.").
A light year is the distance that light travels through a vacuum in one year.
Light year(s) and lightyear(s) may also refer to:
Gregory Alan Isakov is a singer-songwriter. Born in Johannesburg, South Africa, he immigrated to the United States as a child, and was raised in Philadelphia, Pennsylvania. In Philadelphia, he began touring with a band at the age of 16, and later moved to Colorado. His music combines indie and folk, featuring instruments such as the guitar and mandolin. Some of his most popular songs include "The Stable Song," "Big Black Car," and "Raising Cain".
Isakov has spent his entire life traveling, and as a result, his travels have impacted his songwriting; his songs tell stories of miles and landscapes and the search for a sense of place. Music has been a constant force in his life, as he says, "I've always had this sense about music and writing, that I sort of have to do it. Like I'll implode without it. I probably wouldn't do it if I felt any other way."
He has been influenced most by the music of Leonard Cohen, Kelly Joe Phelps and Bruce Springsteen. Gregory has played at many music festivals held across the United States, Canada and Europe. Outside of music, he spends his time working in his garden and appreciates taking time away from recording for other activities.
Tread lightly
Speak dearly
Enough of this
I'm a fucking passive counterfeit
Won't hide my
Hide my head in the rain
The weakness leaves me
Much stronger with every grain
Another reason
My prettiest
Just picture this
I'm fucked if I know
The whole procedure
I'm running and falling
I'm tearless, I need ya
Some indecision
This isn't working any more
Save us two some pain
A face to ignore
A self-expression
Conjures up your name
A concentration
Of times that we were the same
And my confidence has left me too
I'm fucked if I know
The whole procedure
I'm running and falling
I'm tearless, I need ya
Some indecision
This isn't working any more
Save us two some pain
A face to ignore
I'm fucked if I know
The whole procedure
I'm running and falling
I'm tearless, I need ya
Some indecision
This isn't working any more