Polaris, commonly known as the pole star, is situated near the North Celestial Pole and has been used for centuries for navigation. But Polaris hasn't always been the Pole Star and won't be in future. This is gradually changing over a 25 800 year cycle.
Many of you will have seen the story widely reported in the media of the discovery of the gas phosphine in the clouds of Venus - if not, you can find the story here: https://www.bbc.co.uk/news/science-environment-54133538. On Earth phosphine is produced by bacteria and it has led to the interesting speculation as to whether there could be… Continue reading Life on Venus?
In a previous post I talked about the Large Synoptic Survey Telescope (LSST), a large telescope being built in Chile which will spend 90% of its time surveying most of the sky a total of 1000 times over a 10 year period (in the remaining 10% it will revisit areas of specific interest). In this… Continue reading Surveying the Cosmos – Part II
For revised post containing more tips on how to view the Perseids see The Perseids 2021. Meteors (also known as shooting stars) are bright streaks of light caused by small lumps of rock or metal called meteoroids hitting the Earth's atmosphere at a very high speed (in the case of the Perseids around 200,000 km/h). As… Continue reading 11-12 August 2020 – the Perseids
While others spent lock down perfecting their baking skills or becoming experts in home exercise routines, I have been beavering away revising and reissuing the book I originally wrote about the Moon five years ago. I am very pleased to offer this to my readers for free for the next five days, and I hope… Continue reading Short Guide to the Moon – ebook
Explaining Science 