Once upon a time we knew our place in the universe. The science was settled and the experts agreed. The Earth was at the centre of the universe and everything we could see in the [more…]
In September 1956, as Mars approached its closest to Earth for 34 years, John Alldridge summed up what we then knew (or thought we knew) of the planet for the Manchester Evening News – Jerry [more…]
Another week, another element. Let’s head off on another exciting elementary excursion. You’ll get the idea now that I hope to ensure that at least one element is included from each of the eighteen Groups [more…]
Introduction As a child I loved playing about with magnets – I still do. They can move heavy objects – such as lifting cars at a scrap yard. They can also move light (-weight!) objects [more…]
Introduction In part one we looked at how a gyroscope seems to defy gravity. This is accomplished by angular momentum. We’ll come back to that later 🙂 In part two we looked at how a [more…]
I have been wondering how to continue with articles on the space-coins collecting theme. It is a vast subject and open to many directions of thought. However, a glance through history quickly shows that 2022, [more…]
Placing the spacecraft in lunar orbit had not been easy. Compounding the difficulty, the engine firing, which would put the spacecraft in the right spot, had to happen while the spacecraft was out of contact [more…]
The previous article I did about collecting space coins was quite broad; I included quite a few examples of all ages, sizes and themes. Since then I’ve added several more items to the holding; well, [more…]
If history tells us anything, it is that things always have the potential to get worse, and it’s already looking as though 2020 has done just that by inflicting 2021 upon us, not as a [more…]
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