M104 Sombrero Galaxy

Thursday, September 16, 2010

Goodbye to Sunspots

Matthew Penn and William Livingston, observing the Zeeman spliting of the 1565 nanometer infrared neutral iron line, report in:
an 11 year decreasing trend in the sunspot magnetic field strength.

They used the NSO Kitt Peak McMath-Pierce telescope.

Extrapolating the trend means virtually no sunspots in cycle 25 (we are at the beginning of cycle 24) !!

Are we headed to another 70 year long Maunder minimum ?

Monday, September 13, 2010

First Earth based detection of a superbolide on Jupiter

A preprint of a paper on the subject was published in arXiv September 9, and may be downloaded at:

I am very proud that the lead author is affiliated with the University of the Basque Nation, in Bilbao Spain.
My Family comes from the Basque Nation, located in France and Spain.