An astronomical unit (AU) is exactly 149,597,870,700 meters (92,955,807 miles or 149,597,871 kilometers), according to the International Astronomical Union (IAU). This is roughly the average ...

The Sun lies some 93 million miles (150 million km) away, an expanse so large, it forms the basis of our first new unit of distance, conveniently named an astronomical unit, or AU. Astronomers ...

If you guessed the astronomical unit, you are correct. The au — the rough distance between the Earth and the Sun — was previously determined by a ...

The astronomical unit (au) — the rough distance from the Earth to the Sun — has been transformed from a confusing calculation into a single number. The new standard, ...

In short, the Astronomical Unit (AU) is the distance from the Earth to the Sun. That's not technically correct since the Earth's orbit around the Sun isn't perfectly circular.

Astronomers are scrambling to gather data on a mysterious object that’s currently hurtling through the solar system.

One AU is roughly the average distance between the Sun and the Earth, or 149,597,870.691 kilometres. But its formal definition by the International Astronomical Union (IAU) is rather more complicated.

THE world's top astronomical body has endorsed the definition of the Astronomical Unit (AU), a measurement used to calculate the distance between stars and planets.