It depends on what you are trying to measure. Long distances usually are measured in miles. Survey distances usually are measured in feet.
AU is not used to measure the distances on earth, because a astronomical unit is a unit of measurement equal to the distance between Earth and Sun. So that's why you cannot use Au for measure the distances on Earth.
meters or kilometers.
Light-Years
You don't, miles are not a unit in the metric system. All distances are measured in metres. Prefixes are used for multiples or fractions of a metre. Distances that used to be measured in miles would, today, be measured in kilometres.
The Astronomical unit is used to measure the large distances in our solar system. It is roughly the average distance between the Earth and the Sun.
Both are units used to measure distances. An angstrom is 10-10 meters - a very small unit. An AU is the distance from Earth to Sun, used to compare distances in the Solar System - a distance of about 150 million kilometers.Both are units used to measure distances. An angstrom is 10-10 meters - a very small unit. An AU is the distance from Earth to Sun, used to compare distances in the Solar System - a distance of about 150 million kilometers.Both are units used to measure distances. An angstrom is 10-10 meters - a very small unit. An AU is the distance from Earth to Sun, used to compare distances in the Solar System - a distance of about 150 million kilometers.Both are units used to measure distances. An angstrom is 10-10 meters - a very small unit. An AU is the distance from Earth to Sun, used to compare distances in the Solar System - a distance of about 150 million kilometers.
a Lightyear, around 1013 kilometres.
Light year is used to measure the stellar distances whereas miles and km is used to measure distance on Earth.
kilometer is the unit of length that can be used to measure large distances . 1 km can measure length of a road.
The parsec is 3.26 light years. Astronomers measure distances to remote galaxies in megaparsecs--millions of parsecs. This is about the longest commonly used length metric.
In British countries, miles is an old-fashioned unit to measure distances. The modern, international, unit is the kilometer, equal to about 0.6 miles.However, miles as a unit of measurement for distances is still used throughout the US. We rarely use the metric system in the US.
There are MANY units used to measure distances both in Metric and in English types. We use Feet and Yards to measure distances in the US. The academic field often uses metric units like meters and kilometers to measure distances. For larger or massive distances there are the units of miles (English) and Kilomiters (Metric) and then in space we have the Astonomical Unit (Distance from earth to Sun) and the Light Year for the biggest distances. And there are the smaller measures of inches and millimeters.