Longman Dictionary of Contemporary English homepage

Copernican system, the
     
Copernican system, the
the idea, first suggested by Copernicus, that the Earth and the other planets all travel in circles around the sun. Before this it was believed, according to the Ptolemaic system, that the Earth was at the centre of the universe.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary

Browse the dictionary