Category Archives: astronomy

Variable Stars

At the inaugural meeting of the Costa Blanca Astronomy Society Christine Ord gave a very interesting presentation on Variable Stars. Christine pointed out that there are currently 43,000 known variable stars with 14,000 of them in need of further observation … Continue reading

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How do they know the age of stars

The question that Frank answers this month is :- Q. How do we know how old a star or galaxy is? (Christine) This is actually two different questions with two different answers. I don’t have space to deal with them … Continue reading

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