NASA
Stargazers around the world are setting up special telescopes and passing out cardboard eclipse glasses to view the once-in-a-lifetime celestial cameo of Venus passing in front of the sun.
The transit of Venus – a planetary spectacle that won’t occur again until 2117 – won’t be enough to significantly block the sun’s light, but it will give Earth’s closest star a moving beauty mark. Venus is currently Earth’s closest neighboring planet, although Mars occasionally has that distinction.
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