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Get a filter and look up: That dot is Venus
Question of the Day
HONOLULU (AP) - For astronomers, Venus passing in front of the sun is not just a rare planetary spectacle _ it won't be seen for another 105 years. It's also one of those events they hope will spark curiosity about the universe.
Sul Ah Chim, a researcher at the Korea Astronomy and Space Science Institute in the central South Korean city of Daejon, said he hoped people see life from a larger perspective, and "not get caught up in their small, everyday problems."
"When you think about it from the context of the universe, 105 years is a very short period of time and the Earth is only a small, pale blue spot," he said.
As astronomers use the latest technology to document the transit of Venus, stargazers gathering across the world should only look at the celestial event with a properly filtered telescope or cardboard eclipse glasses.
If viewed directly, permanent eye damage could result.
"It's absolutely not an old wives' tale," said Steven Nusinowitz, associate professor of ophthalmology at the UCLA Jules Stein Eye Institute. "Looking directly at the sun is foolish and not advisable."
Extremely hot Venus is one of Earth's two neighbors and is so close in size to our planet that scientists at times call them near-twins. During the transit, it will appear as a beauty mark moving across the face of the sun.
"In terms of rarity, to be here at a time when it's happening, you almost have to look at it," said Geoff Chester of the U.S. Naval Observatory. "It ain't going to happen again in my lifetime."
The transit is happening during a 6-hour, 40-minute span starting just after 6 p.m. EDT in the United States. What you can see and for how long depends on what the sun's doing in your region during that exact window, and the weather.
Those in most areas of North and Central America will see the start of the transit until the sun sets, while those in western Asia, the eastern half of Africa and most of Europe will catch the transit's end once the sun comes up.
Hawaii, Alaska, eastern Australia and eastern Asia including Japan, North and South Korea and eastern China will get the whole show since the entire transit will happen during daylight in those regions.
In Hawaii, university astronomers planned viewings at Waikiki Beach, Pearl Harbor and Ko Olina. At Waikiki, officials planned to show webcasts as seen from telescopes from volcanoes Mauna Kea on the Big Island and Haleakala on Maui.
NASA planned a watch party at its Goddard Visitor Center in Maryland with solar telescopes, "Hubble-quality" images from its Solar Dynamics Observatory Mission and expert commentary and presentations.
Amateur astronomers from the University of North Texas planned to watch from points in Alaska and Hawaii to recreate the 1769 expedition of British Capt. James Cook to Tahiti, part of an effort to use the transit to measure the solar system.
They will use atomic clocks, GPS and high-end telescopes to take measurements, and will use high-end video gear to capture time-lapse video.
Most people don't tend to gaze at the sun for long periods of time because it's painful and people instinctively look away. But there's the temptation to stare at it during sky shows like solar eclipses or transits of Venus.
During the 1970 solar eclipse visible from the eastern United States, 145 burns of the retina were reported, according to the American Academy of Ophthalmology.
The eye has a lens and if you stare at the sun, it concentrates sunlight on the retina and can burn a hole through it. It's similar to when you hold a magnifying glass under the blazing sun and light a piece of paper on fire.
It can take several hours for people to notice problems with their eyes but, by that time, the damage is done and, in some cases, irreversible.
Experts from Hong Kong's Space Museum and local astronomical groups were organizing a viewing Wednesday outside the museum's building on the Kowloon waterfront overlooking the southern Chinese city's famed Victoria Harbor.
The transit begins there around 6 a.m. local time.
In South Korea, the transit coincides with a national holiday.
Choi Hyungbin, head of the Daejon Observatory, said he was expecting more visitors than might otherwise come out to watch the transit. Local media urged residents to visit observatories, reiterating the danger of looking directly at the sun.
This will be the seventh transit visible since German astronomer Johannes Kepler first predicted the phenomenon in the 17th century. Because of the shape and speed of Venus' orbit around the sun and its relationship to Earth's annual trip, transits occur in pairs separated by more than a century.
It's nowhere near as dramatic and awe-inspiring as a total solar eclipse, which sweeps a shadow across the Earth, but there will be six more of those this decade.
Oskar Garcia can be reached on Twitter at http://twitter.com/oskargarcia
Contributing to this report are AP Science Writer Alicia Chang in Los Angeles; and Associated Press writers Rachel D'Oro in Anchorage, Kelvin Chan in Hong Kong and Hye Soo Nah in Seoul.
By Andrew P. Napolitano
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