Astronomical Unit to Foot Converter

An astronomical unit (AU) is a unit of length approximately equal to the average distance from Earth to the Sun, defined as exactly 149,597,870.7 kilometers or about 93 million miles.

The astronomical unit was originally defined as the semi-major axis of Earth's orbit around the Sun. It was first estimated by Giovanni Cassini in 1672 and has been refined over centuries. In 2012, the International Astronomical Union redefined it as an exact value rather than a measured quantity.

Astronomical units are primarily used for measuring distances within the solar system, including distances between planets, asteroids, and comets. They're standard in planetary science, space mission planning, and solar system astronomy.

A foot is a unit of length in the imperial and US customary systems equal to 12 inches or approximately 0.305 meters. It is one of the most commonly used units in these systems.

The foot has ancient origins, originally based on the length of a human foot. Various civilizations used foot-based measurements, but the modern foot was standardized in England. The international foot was defined as exactly 0.3048 meters in 1959.

Feet are extensively used in the United States for measuring height of people and buildings, room dimensions, altitude in aviation, and in construction. They're standard for architectural drawings, real estate listings, and everyday measurements in countries using imperial units.