Vase with Twelve Sunflowers by Vincent Van Gogh

While the exhibition dedicated to Vincent Van Gogh at the Vittoriano in Rome is about to close after being extended for another two weeks by popular demand, a research carried out by the Italian CNR, the University of Perugia’s Department of Chemistry, the University of Antwerp’s Departments of Chemistry and Physics, the Delft University of Technology (TUDelft) and by the Esrf (European Synchrotron Radiation Facility) in Grenoble has discovered why the yellow color of the sunflowers painted by the great painter is turning brown.

A comparison of the same part of the Tempel 1 comet before and after being hit by the impactor launched by the Deep Impact probe (photo NASA)

In July 2005 the Deep Impact probe made the first visit to the comet Tempel 1, in recent days the Stardust spacecraft has taken new photos, including the ones of the crater left by the impactor launched from Deep Impact, and made new measurements to improve our knowledge.

Alexandr Smoleevskiy and Diego Urbina with a simulated Mars soil sample (photo ESA)

The Mars500 expedition organized by the Institute of Biomedical Problems (IBMP) in collaboration with ESA (European Space Agency) had virtually reached Mars a few days ago and it was time to simulate the descent to Mars and to explore the area near the lander.