They use it because its easier to use then km.
(ps. sorry if the answer is wrong, I'm not to smart......)
28.74 AU
Saturn is 1.2 billion km (about 7 AU) from the Earth when the two planets are at their closest.
At its furthest (aphelion) 0.467 AU and at its nearest (perihelion) 0.307 AU.
One Au is 149,668,992kms (93,000,000miles), the distance from the Earth to the Sun. So 10.88 AU is 162,839,863,296kms (1,011,840,000miles)
It is 362,570 km (0.0024 AU) away from the Earth
9 AU = 1,346,380,843 km.9 AU = 1,346,380,843 km.9 AU = 1,346,380,843 km.9 AU = 1,346,380,843 km.
Using units such as the AU (within the Solar System) or the light-year or parsecs (for distances between stars, galaxies, etc.) results in numbers that are easier to grasp than meters or kilometers.
149.6 million km = 1 AU (rounded)1.6 million km = 0.0107 AU (rounded)
120,536 km - 0.000 805 7 AU120,536 km - 0.000 805 7 AU120,536 km - 0.000 805 7 AU120,536 km - 0.000 805 7 AU
28.74 AU
1 light year = 9,460,730,472,580.8 km or 63,239.7263 Astronomical Units (AU).
1 AU = 150 million km (approx) so 4.2 AU = 630 million km
224 397 000 km :)
Saturn is 1.2 billion km (about 7 AU) from the Earth when the two planets are at their closest.
You can use a search engine such as Google or Bing to perform these kinds of unit conversions. Enter "5.2 AU in kilometers" and get the answer5.2 Astronomical Units = 777,909,600 kilometers
150 million km = 1.0027 AU
Mercury - 35,983,610 Venus - 67,232,360 Earth - 92,957,100 Mars - 141,635,300 Jupiter - 483,632,000 Saturn - 888,188,000 Uranus - 1,783,950,000 Neptune - 2,798,842,000 Pluto(may not be a planet) - 3,674,491,000 http://cse.ssl.berkeley.edu/AtHomeAstronomy/act10_datasheet.html IN MILES