Lowell Observatory has a scale model of the solar system that gives you an idea just how much space is in space. The sun, Mercury, Venus, Earth and Mars are fairly close together, but put on a backpack before heading to Pluto. The observatory was built in 1896 by Percival Lowell, who wanted to study Mars, and it was here in 1930 that Pluto was discovered. Nearby is the state's highest point, 12,643-foot Humphreys Peak. Take I-17 north.
Summer nights can be quite cool.
Bring along a light sweater or jacket. All rights reserved.