Just a short post to comment a really fresh astronomy blog for spanish speakers (in fact, for everyone, as Google Translator is our friend):
The blog is maintained by a friend of mine, Dr. Ricardo Hueso, lecturer at the University of the Basque Country and a classmate back in the 90’s (it’s been a long time since then!) at this same University. Ricardo is also a member of the Planetary Atmospheres Group at the Bilbao School of Engineers.
I strongly recommend you his blog, a blog that is quite recent but in which all the entries that regularly appear deserve to be read. Last one is entitled “The structure of the Universe” (“La estructura del Universo”).