Get out your solar eclipse glasses and prepare for a once-in-a-lifetime sighting of Venus. On Tuesday afternoon, the rare transit of Venus—an event that occurs when the planet’s orbit is directly in between the Earth and the sun—will be seen from the U.S. for the last time until 2117. Venus will appear as a tiny black dot floating across the sun’s surface for several hours in the afternoon. Experts warn that special eyewear like solar eclipse glasses are necessary for safe viewing—so hurry to your local planetarium.
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