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.
Click here to see the live stream from NASA.
The Associated Press contributed to this story
