Astronomy

A video of aurora borealis seen from space

On December 24th, the famous Earthrise photo turned 40 years old. Andrew Revkin, New York Times’ journalist and blogger at Dot Earth published that day a most interesting note on this event. Since I use this photo for this very blog I left a comment there. The day after I had the honor of a …

A video of aurora borealis seen from space Read More »

Great astrophotographies – December 2008

Like every last Sunday of each month, this is time for me to present you my selection of the best pictures of the NASA’s Astronomy Picture of the Day (APOD) Like each month, this one was packed with beautiful images and it was very difficult to select just ten. I am absolutely amazed at how …

Great astrophotographies – December 2008 Read More »

Great astrophotographies – October 2008

Like every last Sunday of each month, this is time for me to present you my selection of the best pictures of the NASA’s Astronomy Picture of the Day (APOD) This month was exceptionally rich in wonderful pictures and it was very difficult to select just ten. I am absolutely amazed at how many splendors …

Great astrophotographies – October 2008 Read More »

What is exactly sustainable development ?

After more than 19 months of writing on a blog called Sustainable development and much more, I just realized I never explained what exactly is sustainable development. Basically this term is about three intertwined things (see left): the environment, the society and the economy. This is written with a decreasing order of importance . In …

What is exactly sustainable development ? Read More »