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A new virtual reality app lets users explore the solar system up close, from scorching-hot Mercury to faraway Pluto and beyond. Take a look at some views from the Star Chart program here. A close-up ...

The Pawnee Star Chart is a series of crosses sprinkled around an oval piece of elk skin. Likely made in the early 17th century by the Skiri (also called the Skidi) band of the Pawnee Nation, the chart ...