The word "astronomy" means the arrangement of the stars but we apply it to the arrangement of the entire Universe, not just stars. It is an observational science, since experiments are difficult to perform on solar systems and galaxies - let alone the entire Universe. Cosmology, on the other hand, is more philosophical and is … Continue reading Astronomy versus Cosmology
Astronomy in a Nutshell
There are no equations in our Astronomy module - just a bundle of facts, models and theories. To make learning (and revising) easier, the knowledge that you need can be linked into seven pairs of ideas as listed below; 1. Models of the Universe: Geocentric versus Heliocentric 2. Observing the Universe: Naked Eye versus Using … Continue reading Astronomy in a Nutshell
How did the Universe begin?
As was the case when we considered models of how the Universe is structured, when it comes to explaining the beginning of the Universe you again need to know about two competing ideas. You also need to know about the evidence that either supports or questions each theory. One theory is the Steady State Theory. … Continue reading How did the Universe begin?
Mr Tarrant's physbang 'blog 