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IN THE northern hemisphere, winter is still with us. That means dark nights and plenty of opportunity to look for fainter targets in the sky. In the southern hemisphere, nights are short, but stargazing is still possible. This week, we have two activities, one for the amateur astronomers of each hemisphere.
In the north, we are looking for the Double Cluster. No prize for surmising that this is a pair of star clusters close together in the sky, from our perspective. They are young clusters that are, in fact, 800 light years from each other. But if you have a …