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Girant entorn la Polar / Arround the Pole Star

Per fi m'ha sortit una fotografia del moviment de les estrelles minimament decent! La vaig fer a Perafita, apuntant amb el gran angular cap al nord. També hi ha ajudat una nova adquisició, un filtre de didimi (comprat a eBay) que ajuda a limitar la contaminació luminica nocturna.

 

Aqui teniu informació, en anglès, sobre els filtres de didimi:

 

theastronomybum.blogspot.com/2009/10/didymium-filter-fol-...

 

Foto presa a Perafita; temps d'exposició aproximat, mitja hora.

 

Per espectacular, aquestes imatges (espereu fins 0:25 s.):

 

www.youtube.com/watch?v=0Z3cVQcfb-w

 

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At last I took a star trails picture with a minimum level of 'trails'. That's a 30 minutes exposition taken in a small village in central Catalonia (limiting surrounding light is very important for a good stars picture). A newly acquired didymium red enhancer filter (from eBay) also helps reducing light pollution.

 

theastronomybum.blogspot.com/2009/10/didymium-filter-fol-...

 

For the most spectacular images of the stars moving arround us, look at that (the spectacle really begins at 0:20 s.):

 

www.youtube.com/watch?v=0Z3cVQcfb-w

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Uploaded on April 9, 2010
Taken on April 2, 2010