For those of us in the Northern Hemisphere we are at the time of year when there is the most daylight. In this post I’ll talk about the long summer evenings: not only does the Sun set later at this time of year but the amount of twilight, when the Sun has set but it… Continue reading Summer twilight
As I complete this post from my home in Manchester, England, it is 4:30 pm and already dark outside. Many people think that it will continue to get dark earlier each day in the afternoon until we reach 21 December, the winter solstice. This, however, is not the case. The evenings in fact start to… Continue reading The darker mornings.
This post talks about two interesting effects to do with the way it get dark after the Sun has set. The first one, which anyone who has travelled to places lying at different latitudes will have seen, is that the closer you are to the equator the quicker it gets dark after the Sun has… Continue reading The long summer evenings
The June solstice will fall on June 20 or June 21 this year, depending on where you are in the world. It is the longest day in the northern hemisphere and the day when the Sun is at its highest in the midday sky (see note). The origin of the word solstice is from the Latin words sol,… Continue reading June 20- The Solstice
Today I want to give the scientific explanation for something we all love to see (especially if, like me, you live in a place as rainy as Manchester, England) - the blue sky. I will also discuss the colour of the skies on the Moon and Mars, two places where spacecraft have landed and taken… Continue reading Why is the Sky Blue?