Robur Carolinum (Latin for Charles' oak) was a constellation created by the English astronomer Edmond Halley in 1679. The name refers to the oak where Charles II was said to have hidden from the troops of Oliver Cromwell after the Battle of Worcester. It was located between the constellations of Crux and Carina. It was never popular and is no longer in use.
- Ridpath, Ian. "Robur Carolinum". Star Tales. self-published. Retrieved 21 April 2015.
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