Share this entry

Share this page

lunar observation

Line breaks: lunar ob¦ser|va¦tion

Definition of lunar observation in English:

noun

A measurement of the position of the moon in order to calculate longitude from lunar distance.
Example sentences
  • He speculated that he would continue to ‘amuse’ himself in attempting to determine Monticello's longitude but with lunar observations.
  • At the Greenwich Royal Observatory Halley used the first transit instrument and devised a method for determining longitude at sea by means of lunar observations.
  • If you had a chronometer, you would use it to measure longitude all the time, not just "when lunar observations were impractical."

Definition of lunar observation in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day vigesimal
Pronunciation: vɪˈdʒɛsɪm(ə)l
adjective
relating to or based on the number twenty