* Mercury is less than one AU from the Sun.

* Venus is less than one AU from the Sun.

What is an AU?

AU stands for Astronomical Unit. It's a unit of measurement used to describe distances within our solar system. One AU is the average distance between the Earth and the Sun.

Distances from the Sun:

* Mercury: 0.39 AU

* Venus: 0.72 AU

* Earth: 1 AU

Let me know if you have any other questions about our solar system!