Stellar aberration

This post is a bit more technical than usual and discusses stellar aberration, the apparent movement of stars as a result of the motion of the Earth.  It is an interesting case of the application of the scientific method.  Observations were made to test a scientific theory, but unexpected results were found, which in turn… Continue reading Stellar aberration

Solar energy costs

In a previous post I talked about the advantages of solar electricity compared to other renewable source of electricity. In this post I’ll move away from my normal scientific topics and discuss the costs of small scale solar energy and how it compares with other renewables. Whats is 'the LCOE'? When comparing the relative costs… Continue reading Solar energy costs

Advantages of solar energy

As shown in the graph and table below, most renewable electricity is generated by hydroelectric power. Solar energy lies in third place behind wind. Electricity generated from renewable sources. From Our world in data (2018). The ‘Others’ category includes biofuels  (e.g. burning wood, animal and agricultural wastes), geothermal energy and wave/tidal power) Despite only being… Continue reading Advantages of solar energy

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