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Distances and scales To-scale diagram of distance between planets, with the white bar showing orbital variations. The size of the planets is not to scale. The astronomical unit (AU; equal to 150,000,000 km; 93,000,000 mi) is what the distance from the Earth to the Sun would be if the planet's orbit were perfectly circular.
18 maj 2020 · One AU is the distance from the Sun to Earth's orbit, which is about 93 million miles (150 million kilometers). When measured in astronomical units, the 886,000,000-mile (1,400,000,000-kilometer) distance from the Sun to Saturn's orbit, is a much more manageable 9.5 AU.
Distance can be defined as how far apart two objects are in space. For example, the distance between Chicago and San Francisco is about 2,100 miles (about 3,400 km). As we discussed in Chapter 1, the distances involved in astronomy are so large that special distance units are often used for convenience.
22 kwi 2016 · The distance between the Earth and the Sun is about one hundred and fifty million kilometres. This is a big number, and so astronomers use the astronomical unit to describe this distance. One astronomical unit, or ‘au’, is the distance between the Earth and the Sun.
In standard cosmology, comoving distance and proper distance are two closely related distance measures used by cosmologists to measure distances between objects; the comoving distance is the proper distance at the present time. [citation needed] The comoving distance (with a small correction for our own motion) is the distance that would be ...
When Earth and the Sun are closest, they are about 147.1 million kilometers apart; when Earth and the Sun are farthest, they are about 152.1 million kilometers apart. The average of these two distances is called the astronomical unit (AU). We then express all the other distances in the solar system in terms of the AU.
From an average distance of 93 million miles (150 million kilometers), Earth is exactly one astronomical unit away from the Sun because one astronomical unit (abbreviated as AU), is the distance from the Sun to Earth. This unit provides an easy way to quickly compare planets' distances from the Sun.
