I offered recently to write an article for my local astronomy society on the discovery of dark energy. It is an expanded version of the blog post I wrote on the topic last year and, at over 3000 words, it is longer than my usual posts. I thought it would be of interest to many… Continue reading Dark energy an unexpected finding
The is a now an expanded and updated version of this post available at: https://explainingscience.org/2020/12/10/dark-energy-an-unexpected-finding/ The Expansion of the Universe Astronomers have known since the late 1920’s that the Universe is expanding. By this we mean that distances between objects which are not bound together by another force, such as gravity, increase over time.… Continue reading The discovery of dark energy
This post continues the subject of dark energy, which, as discussed in my previous post is a mysterious form of energy which makes up about 68 per cent of the mass of the Universe and is the reason why the Universe is expanding at an ever-faster speed. This post will discuss how the percentage of dark energy changes over time… Continue reading Dark Energy Over Time
Every object humans have ever studied, such as stars, planets (including the Earth), asteroids, gas clouds and living creatures such as ourselves, is composed of ordinary matter, which is made up of atoms. Interestingly, however, ordinary matter only composes 5% of the mass of the Universe. The remaining 95% is made up of dark matter and dark… Continue reading An overview of dark energy.
Happy new year to all my readers and followers. I hope you have all enjoyed the festive break and that you have some great plans for 2015. I have taken a short break from blogging, although during the break I managed to purchase the domain thesciencegeek.org, which will hopefully make my blog easier to find. I… Continue reading Happy new year 2015 from thesciencegeek.org