Venus Transit 2012

Explanation: Occurring in pairs separated by over a hundred years, there have now been only eight transits of Venus since the invention of the telescope in 1608. The next will be in December of 2117. But many modern telescopes and cameras were trained on this week's Venus transit, capturing the planet in rare silhouette against the Sun. In this sharp telescopic view from Georgia, USA, a narrowband H-alpha filter was used to show the round planetary disk against a mottled solar surface with dark filaments, sunspots, and prominences. The transit itself lasted for 6 hours and 40 minutes. Historically, astronomers used timings of the transit from different locations to triangulate the distance to Venus, while modern astronomers actively search for planets that transit distant suns.


Image Credit & Copyright: Chris Hetlage

Ο πλανητης Αφροδιτη καθως περναει μπροστα απο τον Ηλιο

http://www.youtube.com/watch?v=4Z9rM8ChTjY&feature=player_embedded

Πατηστε στον παραπανω συνδεσμο για να προβληθει ενα καταπληκτικο Video απο το Solar Dynamics Observatory, οπου φαινεται οπλανητης Αφροδιτη να περναει μπροστα απο τον Ηλιο. Ο ηλιος απεικονιζεται σε ολα τα μηκη κυματος