By definition, it's the Earth.
The planet 5 AU from the sun is Jupiter.
Earth is the planet that is one astronomical unit (AU) away from the sun. An AU is the average distance from Earth to the Sun, which is about 93 million miles or 150 million kilometers.
It is the earth that is in orbit one astronomical unit (AU) from the sun. That's where the AU came from. One AU is the mean distance from the sun to the earth. A link can be found below.
The Earth. The average sun to Earth distance is how one Astronomical Unit is defined (1 AU).
Jupiter is roughly 5.2 AU from the sun.
One AU is the distance between Earth and the Sun. No planet is that big across so you can only be talking about distance from the sun and in that case Earth by definition has an astronomical unit.
The planet that is about 30 AU (astronomical units) from the sun is Neptune. Neptune is the eighth and farthest known planet from the sun in our solar system.
Earth is one astronomical unit away from the sun.
Mars of course.....
Saturn, Its mean distance is 9.53 AU, where one AU (Astronomical Unit) is the earth to sun distance.
Uranus is around 19 AU from the sun, theres no planet that is 1.9 AU from the sun. the closest to this is Mars, at 1.5 AU.
Earth. The average sun to Earth distance is how one Astronomical Unit is defined (1 AU).