Large sunspot group

In the Academy of Sciences astro photographers circle he was not previously active, even more warmly now our "Welcome". On 7 July this year, he managed the mosaic of an interesting area to a large sunspot group (AR 1785). He used a Meade Refractor (ED 152 mm with 3x Barlow lens) and as a DMK camera 21AU618.AS. At 3657 mm effective focal length (aperture 24) the frames of the video sequence were exposed to 0.2 ms. 

The Great Wall of China is not can be seen from space

One of the most popular spatial myths is that the Great Wall is the only man that can be seen from space. Well, not true. The reality is you cannot easily see the Great Wall from low Earth orbit to the naked eye. And rightly the Apollo astronauts could not see it from the moon, despite the urban legend has spread widely.

Sun's 2013 Solar Activity Peak Is Weakest in 100 Years

Though the sun is currently in the peak year of its 11-year solar weather cycle, our closest star has been rather quiet over all, scientists say.

This year's solar maximum is shaping up to be the weakest in 100 years and the next one could be even more quiescent, scientists said Thursday (July 11).