what-is-a-parsec-why-do-scientists-use-this-unit-instead-of-light-yearshttps://www.astronomy.com/science/what-is-a-parsec-why-do-scientists-use-this-unit-instead-of-light-years/What is a parsec? Why do scientists use this unit instead of light-years? | Astronomy.comcategories:Science | tags:Magazinehttps://www.astronomy.com/uploads/2021/09/may-2009-stellar-parallax.jpgInStockUSD1.001.00sciencearticleASY2023-05-182009-03-2337249
