The changing pole star

Many people know that Polaris, the brightest star in the constellation Ursa Minor (The Little Bear), is also known as the pole star. Indeed, the name Polaris itself was invented in the sixteenth century and is derived from the Latin stella polaris -pole star. The location of Polaris - Image credit Wikimedia Commons Polaris is… Continue reading The changing pole star

How tides work

Although the Moon is much smaller and less massive than the Earth its gravitational field still has significant effects on the Earth. The most noticeable of these are tides, the periodic rise and fall of sea levels. High and low tides- Images from Wikimedia Commons     Causes of Tides The average Earth- Moon distance… Continue reading How tides work

Staying on the Moon

Until the outbreak of the global pandemic there was a good chance that mankind would return to the Moon in the next ten years, even if the deadline of project Artemis to have a manned mission in 2024 was a little ambitious. It will be some time before the effects of the current crisis on… Continue reading Staying on the Moon

Solar energy

The Earth receives more energy from the Sun in a single hour than the whole of humanity consumes in an entire year. In this post I’ll talk about some of the science behind this interesting fact and I’ll also discuss how solar energy is likely to become more important to us in the future. How… Continue reading Solar energy

21 January 2019 lunar eclipse

On the night of 20/21 January 2019 there will be a total eclipse of the Moon, which will be viewable from many areas of the world. This will be worth making the effort to see, especially for my readers in the western USA and Canada for whom it will occur at a sociable hour. The… Continue reading 21 January 2019 lunar eclipse