Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
A variable star having a regular cycle of brightness with a frequency related to its luminosity, so allowing estimation of its distance from the earth.
- ‘Using this, astronomers only needed to know the period of a cepheid variable to figure out how bright, and therefore how far away it was.’
- ‘The size and age of the expanding Universe is calculated by astronomers on the basis of winking stars called cepheids, the nearest of which is 1000-2000 light years away.’
- ‘Shapley also pointed out in that paper that the noted increase in the distance of the clouds explains the ‘failure of the persistent Harvard searches for cluster-type cepheids in the Magellanic Clouds and their globular clusters.’’
- ‘Several hundred cepheid variables are known in our Galaxy.’
- ‘Type I cepheids are most closely associated with the thin disc and the spiral arm components of the Galaxy.’
Early 20th century: from the name of the variable star Delta Cephei, which typifies this class of stars.
Are you looking for a word for a foolish person? We explore twelve interesting words to describe the dunderheads in your life.
Before you run for the hills, let’s run through a list of ‘run’ expressions that are running through our minds.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.