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How to view the transit of Mercury online on 9 May

8 May 2016 Astronomy Now

The 2016 transit of Mercury is upon us! With fine weather predicted across a large swathe of the British Isles, many will enjoy clear skies for at least some of this 7½-hour event. But if you don’t have a suitably equipped telescope, or are unable to attend any of the transit-viewing activities organised nationwide, you can still view the phenomenon online.

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Earth photobombs SDO’s view of 13 September partial solar eclipse

14 September 2015 Astronomy Now

The alignment of Sun, Moon and Earth resulted in a partial solar eclipse on 13 September, visible only from the southern tip of Africa and Antarctica. But as NASA’s Solar Dynamics Observatory, or SDO, kept up its constant watch on the Sun, its view of the eclipse was photobombed by the Earth — the first time that an Earth eclipse and a lunar transit have coincided.

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Sun sizzles in high-energy X-rays

23 December 2014 Astronomy Now

Designed to study black holes, supernova remnants and other extreme objects beyond our Solar System, NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) has captured the most sensitive portrait of the Sun ever taken in high-energy X-rays.