Opportunities for solar energy

In 2019, the year before the restrictions of the covid-19 pandemic, the world energy consumption was slightly higher at around 170 000 TWh. In this post I will talk about some of the science behind this amazing fact and discuss the  challenge of getting solar energy from where it is plentiful to where it is… Continue reading Opportunities for solar energy

September 22 the equinox

In 2021 September 22 is the date of the September equinox and is also the first day of autumn (or the first day of spring if you're one of my readers in the Southern Hemisphere). In this post I’ll talk about the equinoxes and discus the commonly held view that they are the two days in… Continue reading September 22 the equinox

The Perseids 2021

The night of  12/13  August will be the peak of the Perseids, one of the most famous prolific meteor showers. 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 very high speed (in the case of the Perseids around 200,000 km/h).… Continue reading The Perseids 2021

Congratulations Blue Origin!

A week is certainly a long time in crewed spaceflight! Following Richard Branson’s trip to “the edge of space” on Sunday 11 July,  Jeff Bezos went one step further on July 20.  He made a short journey to space, in the first crewed flight of his Blue Origin rocket ship, New Shepard.  As the spacecraft… Continue reading Congratulations Blue Origin!

Congratulations Virgin Galactic

Great news from Virgin Galactic on Sunday. Although according to the widely used definition, their spacecraft didn’t quite get into space. Most international authorities define that space begins at an altitude of 100 km (the Karman line), whereas VSS  Unity reached an altitude of 86 km, but a fantastic achievement nevertheless !!. For those who… Continue reading Congratulations Virgin Galactic