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Parallax is defined as an object appearing as if it is positioned differently when it is looked at from different angles or different positions.
A parsec is equivalent to 3.26 light years, and since a light year is the distance light travels in 1 year 9.4 trillion km, 1 parsec equals 30.8 trillion km.he term parsec is a combination of 2 words, parallax (par) and arc second (sec). Parallax means something looks like it changed its location because you changed yours. For example, if you stand on your porch and look across the street, you will see a house on your left and a house on your right.