Because of the unwieldy large numbers that would otherwise be required.
A Parsec is the distance from the Sun to Earth, and a light year is the distance that light would travel in a year.
Astronomers use the unit of measure "Light Years" to calculate the distance between pretty much anything in the Universe.
It's more convenient for scientists. AU is the distance the earth is from the sun.
light-years, parsecs, and megaparsecs
Total distance traveled & total elapsed time.
You should always measure your following distance by car length. This will give yourself time to break when necessary without being close to the driver ahead of you.
The universe has been continuously growing since the Big Bang, and there is no way to accurately measure it, so no. Comments: In fact astronomers have estimated the size of the "Observable Universe". They say there's probably a lot more that we can't see. The Universe is about 13.8 billion years old. That gives the maximum distance we can observe as 13.8 billion light years. But while the light from the "edge" of the Observable Universe has been travelling to us, the Universe has been expanding. Astronomers have estimated how far away that edge is NOW. The usual estimate given for the "real" radius of the Observable Universe is about 46 billion light years.
No.
Nothing.Inches are a measure of distance, not weight.Nothing.Inches are a measure of distance, not weight.Nothing.Inches are a measure of distance, not weight.Nothing.Inches are a measure of distance, not weight.
A line does not have a definite length .It extends to infinity.Whereas a line segment has a definite measure.
A line does not have a definite length .It extends to infinity.Whereas a line segment has a definite measure.
there is no definite answer
It is difficult to estimate the current size of the universe because the universe curves back on itself. (Do not ask how it curves back on itself. The equations are in the Theory of Relativity by Albert Einstein.) Since no one can ever measure the distance to an edge, no way exists to determine the Universe's size.