"Red moon during the total lunar eclipse, June 15, 2011
The photo was taken during the total lunar eclipse on June 15. The 2-second-exposure shows the moon in a faint red light. If the Earth would be just a hard sphere, the moon would not be visible at all as long as it is in the total shadow of the Earth. It is the very thin layer of atmosphere around the Earth that creates the effect: It filters and re-directs the light:
1.Everything but the long-waveelngth red light gets scattered away while the sunlight passes through the atmosphere (you remember the red sun at sunset?)
2. The remaining (red) light gets just scattered enough into the shadow region behind the Earth to illuminate the moon. "Light pollution" in Cairo made it a bit of a challenge to see the moon with the naked eye as nice as on the photo.
Bubbles and Soap Films
Please find here a pdf version of the lecture by Prof. Kuehnemann on "Magical bubbles ans soap films" which he gave on June 8.
Janus particles
This is an article introducing particles with two different sides, black and white, magnatic and non-magnetic, and why they are interesting.
Janus particles
New Journal of Physics
You can find there recent physics articles for free. New Journal of Physics