The pages of the SDO (Solar Dynamics Observatory), NASA program to investigate the causes of solar variations, have a repository spectacular images of the sun.
These pages contain a wealth of scientific information on issues concerning solar radiation, with periodic updates its image bank.
In NASA pages every day we can find a picture of astronomy, some of great beauty and other, no less gripping, educational character marking.
Last 12 March 2012, published an interactive Flash application that allows you to appreciate the different orders of magnitude of our universe. From the tiniest on a scale in which the atoms are enormous, to the most massive of our universe, where the biggest stars are simple points of light.
