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Did you know? The Southern Cross

The Southern Cross is an iconic constellation steeped in our nation’s history and culture. The photograph in this post was taken by Geoffrey Wyatt, Senior Education Producer Museum of Applied Arts and Sciences. The Southern Cross is the smallest of the 88 constellations spanning only six degrees from north to south. It was once visible from the northern hemisphere thousands of year ago due to the shift of the Earth’s axis (known as precession). Its Classical name is Crux, and the constellation is easily identified by its four stars that appear from our planet to be oppositely aligned and almost of equal brightness, and then a fifth star which is not quite as bright, Stars in the Southern Cro

Solar observations: September 2019

Sunspot activity for the month of September remained extremely low however, on the 1st September two very small Bxi spots were observed in AR12748 and remained on the solar disc the following day as a single Axx spot. No further Sunspots were seen on the Sun for the rest of the month. Prominences The most significant Prominences were on the 7th when a triple arched Prominence reached 65,000km in height, and 158,000km across the NW limb - see the diagram below. Another single arch Prominence on the 8th reached a height of 74,000km. On the 18th another double arch Prominence reached a height of 42,000km on the SE limb. Finally on the 22nd another double arched Prominence reached a height of 65

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