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What is a unit of length, defined as the distance that light travels in a vacuum in one Julian year.
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Mahatma Gandhi was the pioneer of the Indian Independence Movement contrary to British standards. He enlivened social liberties and opportunity developments over the world. The title “Mahatma” was given to him in South Africa in 1914. In India, Mahatma Gandhi was affectionately called 'Bapu' and 'Gandhiji'
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 may be 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 contexts and popular science publications.The unit most commonly used in professional astronomy is the parsec , which derives from astrometry: it is the distance at which one astronomical unit subtends an angle of one second of arc.