Planet Venus moves across the Sun during the transit in Kunming in southwest China's Yunnan province, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the sight of the transit of Venus. (AP Photo) CHINA OUT

The planet Venus passes in front of the sun as seen from Mount Vernon, Wash Tuesday afternoon June 5, 2012 around 5:30 p.m. (AP Photo/Scott Terrell, Skagit Valley Herald)

The transit of Venus can be seen against the setting sun as a black dot near the KCPL building in downtown Kansas City, Mo, from the upper deck of Kauffman Stadium during Tuesday's baseball game between the Kansas City Royals and Minnesota Twins on June 5, 2012.(AP Photo/John Sleezer, The Kansas City Star)

Saudis use special protective viewing glasses to watch the transit of Venus at the capital Riyadh, Saudi Arabia, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/Hassan Ammar)

Saudi men use a special telescope and special protective viewing glasses to observe the transit of Venus at the capital Riyadh, Saudi Arabia, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/Hassan Ammar)

A Saudi wearing special protective viewing glasses watch the transit of Venus at the capital Riyadh, Saudi Arabia, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/Hassan Ammar)

Indians watch Venus cross the sun, in New Delhi, India Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/ Manish Swarup)

A man watches Venus cross the sun, in New Delhi, India Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. AP Photo/ Manish Swarup)

Venus moves across the sun during the transit in Sydney, Australia, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/Rob Griffith)

Venus is seen passing in front of the rising Sun, in this image taken through a telescope, from Losevo village, north of St.Petersburg, Russia, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/Dmitry Lovetsky)

Venus is seen passing in front of the sun in the clouds, in this image taken through a telescope, from Losevo village, north of St.Petersburg, Russia, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/Dmitry Lovetsky)

Venus is seen passing in front of the sun in the clouds, in this image taken through a telescope, from Losevo village, north of St. Petersburg, Russia, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/Dmitry Lovetsky)

Indians watch the projection of the transit of Venus against the Sun, in New Delhi, India, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/ Manish Swarup)

Saudi men use a special telescope and special protective viewing glasses to observe the transit of Venus at the capital Riyadh, Saudi Arabia, Wednesday, June 6, 2012. People around the world turned their attention to the daytime sky on Tuesday and early Wednesday in Asia to make sure they caught the rare sight of the transit of Venus. (AP Photo/Hassan Ammar)

James Beckmann looks through a Meade telescope into the sun to view the tranist of Venus across the sun on Tuesday, June 5, 2012, at Central Lakes College in Brainerd, Minn. (AP Photo/Brainerd Dispatch, Kelly Humphrey)

The sun sets over the west side of Chicago as the planet Venus passes Tuesday June 5, 2012 at U.S. Cellular Field. | Tom Cruze~Sun-Times

The sun sets over the west side of Chicago as the planet Venus passes Tuesday June 5, 2012 at U.S. Cellular Field. | Tom Cruze~Sun-Times

The planet Venus starts it pass in front of the sun, Tuesday, June 5, 2012 at the Adler Planetarium in Chicago. Clear and sunny skys allowed hundreds at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Tony Tortorici from Pingree Grove checks his iPhone's photo of Venus cutting across the Sun at the Adler Planetarium, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Tony Tortorici from Pingree Grove checks his iPhone's photo of Venus cutting across the Sun at the Adler Planetarium, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Maurizio Malfeo, from Chicago Checks on Venus with the help of a Meade "Starfinder" Newtonian Reflector Telescope setup at the Adler Planetarium to help visitors view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Maurizio Malfeo, from Chicago Checks on Venus with the help of a Meade "Starfinder" Newtonian Reflector Telescope setup at the Adler Planetarium to help visitors view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Maurizio Malfeo, from Chicago Checks on Venus with the help of John Napoletano's (standing rear) Meade "Starfinder" Newtonian Reflector Telescope setup at the Adler Planetarium to help visitors view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Kiera Steckleberg, 10, Checks on Venus with the help of John Napoletano's (standing left) Meade "Starfinder" Newtonian Reflector Telescope setup at the Adler Planetarium to help visitors view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Hundreds flocked to the Adler Planetarium to view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Hundreds flocked to the Adler Planetarium to view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Hundreds flocked to the Adler Planetarium to view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

The planet Venus starts it pass in front of the sun, Tuesday, June 5, 2012 at the Adler Planetarium in Chicago. Clear and sunny skys allowed hundreds at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Hundreds flocked to the Adler Planetarium to view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Hundreds flocked to the Adler Planetarium to view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

The planet Venus starts it pass in front of the sun, Tuesday, June 5, 2012 at the Adler Planetarium in Chicago. Clear and sunny skys allowed hundreds at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Dick Bukrey of Evanston protects his eyes with solar glasses provided by Adler Planetarium from solar damage at the event of Venus passing infront of the Sun at the Adler Planetarium, Tuesday, June 5, 2012 in Chicago. Clear and sunny skys allowed hundreds at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Fran Bukrey of Evanston protects her eyes with the help of special solar glasses provided by the Adler Planetarium at the solar event of Venus passing infront of the Sun at the Adler Planetarium, Tuesday, June 5, 2012 in Chicago. Clear and sunny skys allowed hundreds at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Fran Bukrey of Evanston uses Adler provided solar glasses to protect her eyes from the solar event of Venus passing infront of the Sun at the Adler Planetarium, Tuesday, June 5, 2012 in Chicago. Clear and sunny skys allowed hundreds at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Hundreds flocked to the Adler Planetarium to view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Hundreds flocked to the Adler Planetarium to view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Hundreds flocked to the Adler Planetarium to view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times

Hundreds flocked to the Adler Planetarium to view the solar event of Venus passing in front of the Sun, Tuesday, June 5, 2012. Clear and sunny skys allowed Chicagoans at the Adler to view the rare event. The next transit of Venus won't be for another 105 years. | Dom Najolia~Sun-Times