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
Hubble’s best pictures
The Hubble Space Telescope will reach its 30th birthday on 24th April 2020. To celebrate this milestone, the Physics World website is counting down its Top 10 Hubble Images. At number 10... Hubble's image of the Horsehead Nebula, which was announced on 15th April, can be viewed by clicking here. At number 9... Hubble's image … Continue reading Hubble’s best pictures
Mr Tarrant's physbang 'blog 