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Look at the Sun for half an hour

Don't worry, this is safe.

sunEvery twelve seconds NASA’s Solar Dynamics Observatory (SDO) images the Sun in ten wavelengths, each with eight times HD video resolution. Image processing to produce this mesmerising video took about ten hours of work for one minute of footage.
Don’t miss this half hour Sun watching up close. You will think differently about our Star.

Ten free courses on Astronomy and the Universe

ultimate mooc guideMassive Open Online Courses (MOOCs) have become very popular and are a unique tool to spread knowledge around the globe, without any restrictions of prior education and experience. Such courses typically attract tens of thousands of students each.

Umer Abrar has compiled a list of ten courses that are currently available via various MOOC organisations. See the list on the Physics-Astronomy website here.