1. September 15, 2014 An astronomical unit (AU) is a unit of length equal to about 92,955,801 miles. It is defined as the mean distance between the Earth and the Sun over one Earth orbit. When someone speaks of the distance of a planet from the Sun, this usually means the “mean distance” since the planets are not the same distance from the Sun at every point in their orbits. Astronomers often use the unit AU to refer to the mean distance of planets from the Sun. Table 1.11 summarizes the mean distances of the planets from the Sun in both miles and AU. Based on the given information, 1 AU is equal to approximately: A.1.0 million miles. B.36.0 million miles C.92.9 million miles D.2,794.3 million miles Table 1.11 PlanetMean Distance From Sun (millions of miles) Mean Distance in AU Mercury36.00.39 Venus67.10.72 Earth92.91.00 Mars141.51.52 Jupiter483.45.20 Saturn886.79.54 Uranus1,782.719.18 Neptune2,794.330.06

2. September 16, 2014 An astronomical unit (AU) is a unit of length equal to about 92,955,801 miles. It is defined as the mean distance between the Earth and the Sun over one Earth orbit. When someone speaks of the distance of a planet from the Sun, this usually means the “mean distance” since the planets are not the same distance from the Sun at every point in their orbits. Astronomers often use the unit AU to refer to the mean distance of planets from the Sun. Table 1.11 summarizes the mean distances of the planets from the Sun in both miles and AU. According to Table 1.11, the mean distance of Mercury from the Sun is: A.0.39 AU B.0.72 AU C.36.0 AU D.67.1 AU Table 1.11 PlanetMean Distance From Sun (millions of miles) Mean Distance in AU Mercury36.00.39 Venus67.10.72 Earth92.91.00 Mars141.51.52 Jupiter483.45.20 Saturn886.79.54 Uranus1,782.719.18 Neptune2,794.330.06

3. September 17, 2014 An astronomical unit (AU) is a unit of length equal to about 92,955,801 miles. It is defined as the mean distance between the Earth and the Sun over one Earth orbit. When someone speaks of the distance of a planet from the Sun, this usually means the “mean distance” since the planets are not the same distance from the Sun at every point in their orbits. Astronomers often use the unit AU to refer to the mean distance of planets from the Sun. Table 1.11 summarizes the mean distances of the planets from the Sun in both miles and AU. According to Table 1.11, the planet farthest from the Sun is a mean distance from the Sun of: A.0.39 AU B.30.06 AU C.36.0 AU D.3,794.3 AU Table 1.11 PlanetMean Distance From Sun (millions of miles) Mean Distance in AU Mercury36.00.39 Venus67.10.72 Earth92.91.00 Mars141.51.52 Jupiter483.45.20 Saturn886.79.54 Uranus1,782.719.18 Neptune2,794.330.06

4. September 18, 2014 An astronomical unit (AU) is a unit of length equal to about 92,955,801 miles. It is defined as the mean distance between the Earth and the Sun over one Earth orbit. When someone speaks of the distance of a planet from the Sun, this usually means the “mean distance” since the planets are not the same distance from the Sun at every point in their orbits. Astronomers often use the unit AU to refer to the mean distance of planets from the Sun. Table 1.11 summarizes the mean distances of the planets from the Sun in both miles and AU. According to Table 1.11, which of the following planets is a mean distance of 483.4 million miles from the Sun? A.Venus B.Earth C.Mars D.Jupiter Table 1.11 PlanetMean Distance From Sun (millions of miles) Mean Distance in AU Mercury36.00.39 Venus67.10.72 Earth92.91.00 Mars141.51.52 Jupiter483.45.20 Saturn886.79.54 Uranus1,782.719.18 Neptune2,794.330.06

5. September 19, 2014 An astronomical unit (AU) is a unit of length equal to about 92,955,801 miles. It is defined as the mean distance between the Earth and the Sun over one Earth orbit. When someone speaks of the distance of a planet from the Sun, this usually means the “mean distance” since the planets are not the same distance from the Sun at every point in their orbits. Astronomers often use the unit AU to refer to the mean distance of planets from the Sun. Table 1.11 summarizes the mean distances of the planets from the Sun in both miles and AU. According to Table 1.11, which of the following planets is a mean distance of 9.54 AU from the Sun? A.Mars B.Jupiter C.Saturn D.Neptune Table 1.11 PlanetMean Distance From Sun (millions of miles) Mean Distance in AU Mercury36.00.39 Venus67.10.72 Earth92.91.00 Mars141.51.52 Jupiter483.45.20 Saturn886.79.54 Uranus1,782.719.18 Neptune2,794.330.06