If you are teaching a unit on space science or astronomy you might want to look at the interactive image of 1.7 billion stars taken by European Space Agency craft Gaia. According to the article in VOX, "This database is not just for making pretty images. It also contains information on the distance, motion, and color (useful in determining temperature and age) of about 1.3 billion of the stars. It’s a 3D, moving atlas of the Milky Way." To see the interactive map click
here.
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