The Brightness of Venus

Anyone, even the most casual observer,  looking at  the evening sky in the last month will have noticed the brilliant white planet Venus shining in the west. Often known as the Evening Star, Venus is the third brightest natural object in the sky after the Sun and the Moon. In this post I’ll talk about… Continue reading The Brightness of Venus

Measuring and Mapping Light Pollution

As discussed in a previous post , light pollution is a major nuisance to astronomers both amateur and professional. When astronomers classify how much light pollution there is at a particular location, they often use the Bortle Scale, devised by John Bortle and first published in the popular astronomy magazine Sky and Telescope (Bortle 2001). Rather… Continue reading Measuring and Mapping Light Pollution

SpaceX Starlink Satellites

Many of you will have seen the pictures last year showing long ‘trains’ composed of as many as sixty SpaceX Starlink satellites crossing the sky. A 'train' of SpaceX Starlink satellites just after their launch. In the days after launch these trains break up as the satellites position themselves into their final orbits These satellites… Continue reading SpaceX Starlink Satellites

Free e-book on Venus and how to Terraform it

Merry Christmas! With Christmas coming up I’d  like to give a free gift to all my readers. My e-book 'Venus and how to Terraform it' will be available free in the Kindle bookstore for five days from today  (19 December 2019).  To get your FREE copy please click on the link below . Get free… Continue reading Free e-book on Venus and how to Terraform it

The evenings are drawing out already

Although there is still a week to go until the December solstice, the evenings are already starting to draw out. I have decided to re-blog an edited version of my 2015 post on this topic. ------------------------------ As I complete this post, it's completely dark outside and it's only 5 o'clock in the afternoon; most people… Continue reading The evenings are drawing out already