# What Does AU Mean In Distance?

## Where is the biggest planet gap?

Jupiter, Saturn, Uranus, Neptune (Outer Planets) The large gap between Mars and Jupiter is where the outer solar system begins.

Jupiter is 483.4 million miles from the sun, which means that it’s 341.9 million miles from Mars, its closest neighbor..

## Who first calculated the distance to the sun?

AristarchusFinding the distance Historically, the first person to measure the distance to the sun was the Greek astronomer Aristarchus around the year 250 B.C. He used the phases of the moon to measure the sizes and distances of the sun and moon. During a half moon, the three celestial bodies should form a right angle.

## How do you calculate distance in AU?

An AU is approximately 93 million miles (150 million km). It’s approximately 8 light-minutes. More exactly, one astronomical unit (AU) = 92,955,807 miles (149,597,871 km).

## What is au distance for planets?

Planet (or Dwarf Planet)Distance from the Sun (Astronomical Units miles km)Number of MoonsMercury0.39 AU, 36 million miles 57.9 million km0Venus0.723 AU 67.2 million miles 108.2 million km0Earth1 AU 93 million miles 149.6 million km1Mars1.524 AU 141.6 million miles 227.9 million km26 more rows

## How long does it take to travel 1 AU?

499.0 secondsLight travels at a speed of 299,792 kilometers per second; 186,287 miles per second. It takes 499.0 seconds for light to travel from the Sun to the Earth, a distance called 1 Astronomical Unit.

## Why do astronomers use AU to measure distances?

Astronomical units are just a useful way to think about the solar system relative to the distance from Earth to the Sun, because it’s easy to use. … When you use AU, it is easier to understand the relative distances, and that Saturn is about ten times farther from the sun.