Enthralling: Venus is silhouetted as it crosses in front of the sun as it sets behind the Kansas City, Missouri skyline on Tuesday, June 5, 2012
Planet Venus is seen as a black dot as it transits across the Sun during sunrise in Sofia, Bulgaria on June 6, 2012
The transit of Venus taken from Burton Dassett between Stratford Upon Avon and Banbury, UK
Venus is seen transiting across the Sun on June 6, 2012 outside Sarajevo
The planet Venus passes in front of the Sun as seen during the sunrise behind the Bratislava Castle in Bratislava, Slovakia, 06 June 2012
A composite sequence photo of the steps of the entire transit of Venus seen over the sky of Seoul, South Korea, 6 June 2012
Dramatic: This image provided by NASA shows the Solar Dynamic Observatory's ultra-high definition view of Venus on it's transit, an event which will not occur for another 105 years
Impressive: This image provided by NASA shows the Solar Dynamic Observatory's ultra-high definition view of Venus, black dot at top center, passing in front of the sun on Tuesday, June 5, 2012
Bright: This is just one frame of an astonishing short video put online by NASA of Venus passing the sun
Monumental: The planet Venus passes in front of the sun as it begins to set behind the Goddess of Liberty atop the Texas State Capitol in Austin, Texas, left, and near the KCPL building in downtown Kansas City, Mo, right
Scene: A view of the Sun as the planet Venus passes in between the Sun and the Earth in New York, New York, USA, 05 June 2012
The transit of Venus taken from Burton Dassett between Stratford Upon Avon and Banbury, UK - Venus has made a spectacular transit across the sun in a rare event that wont be witnesse again for over a hundred years
Venus crosses the sun from an observation point in Pakistan on June 6, 2012
Worldwide fascination: The planet Venus makes its transit across the Sun as seen from Kathmandu on June 6, 2012
Morning breaks: An observer looks through a telescope during sunrise in Vienna
Mesmerising: Spectators at Edgewater Park in Cleveland watch the sun set as the planet Venus crosses the upper right portion of the star, Tuesday, June 5, 2012
The U.S.: The planet Venus makes a transit as a person watches the sun set over the Great Salt Lake outside Salt Lake City, Utah, June 5, 2012
Spectacular: The planet Venus can be seen on its transit of the Sun, from Beijing
Last-in-a-lifetime: In this photo made using a red filter, Venus begins to pass in front of the sun, as visible from from Overland Park, Kan. on Tuesday
Impressive: A bird sits atop one of the domes of the landmark Taj Mahal as Venus, top left, begins to pass in front of the sun, as visible from Agra, India, Wednesday, June 6, 2012
The planet Venus makes its transit across the Sun as seen from Kathmandu
Venus is seen as a dot as it transits across the Sun on June 6, 2012 outside Sarajevo
Show: The planet Venus crosses the upper right portion of the sun as seen from Edgewater Park in Cleveland on Tuesday, June 5, 2012
Rarity: A view of the Sun as the planet Venus passes in between the Sun and the Earth in New York, New York, USA, 05 June 2012
Drawing near: In this handout image provided by NASA, the SDO satellite captures the approach of Venus before it transits across the face of the sun on June 5, 2012 from space
Rare: Handout image courtesy of NASA shows the planet Venus at the start of its transit of the Sun, June 5, 2012. One of the rarest astronomical events occurs on Tuesday and Wednesday when Venus passes directly between the sun and Earth, a transit that won't occur again until 2117
Fascinated: Eight-year-old Alex Olling smiles as he uses makeshift sunglasses to watch Venus crossing the sun's face on June 5, 2012 as seen from College Park, Maryland
Stunned: A man uses a sun observation glass to watch the transit of Venus across the face of the sun on June 5, 2012, in Medellin, Antioquia department, Colombia
Curious: People use solar glasses to view the transit of Venus across the face of the sun on June 5, 2012 from Riverside Park on the west side of Manhattan in New York
Technique: Astronomer Raminder Samra attempts to get the view of Venus crossing the Sun using a shadow on a piece of paper and the telescope at the MacMillan Southam Observatory in Vancouver, British Columbia June 5, 2012
Preparation: Hong Kong stargazers use a special telescope to observe the transit of Venus along the Victoria Habour
Spectacle: Venus begins to pass in front of the sun, as visible from New York, Tuesday, June 5, 2012
Vision: Venus, upper right, transits the sun as seen through a dark glass from Quito, Ecuador, Tuesday, June 5, 2012
Sight: Venus (top, R) crosses the sun's face as seen from Havana on June 5, 2012
Special: The small black dot seen at the top right of the sun is the planet Venus, as it transits across the face of the sun Tuesday, June 5, 2012, as seen from Mt. Trashmore in Virginia Beach, Va