Transit of Venus 2012
Discovery About this episode
<p>Astronomer Marek Kukula from the Royal Observatory at Greenwich explores the scientific implications of the forthcoming transit of Venus across the face of the Sun, a rare astronomical event that will not occur again until 2117. </p><p>Previous transits have helped establish fundamental facts about our solar system, including the distance and relative positions of all the planets that orbit our sun. </p><p>But now, the forthcoming transit in June 2012, the last this century, will help planet hunters searching for other worlds across the galaxy (exo-planets). </p><p>As Marek discovers, technology now makes it possible to pinpoint not only a planet's mass, size, and distance from its star but we can also establish whether it has an atmosphere and what that atmosphere might consist of and therefore whether it could theoretically support life. </p><p>Thanks to the next transit event, the search for another Earth has taken a bold step forward.</p><p>(Image: Venus (black dot) is silhouetted as it orbits between the Sun and the Earth during the transit of Venus seen from Bangkok on 6 June 6 2012. Credit: AFP/Getty Images)</p>
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