Definition of astronomy Astronomy

/ʌstɹɑˈnʌmi/ - [ustranumee] - as•tron•o•my

We found 10 definitions of astronomy from 8 different sources.

What does astronomy mean?

WordNet

Noun Plural: astronomies
astronomy - the branch of physics that studies celestial bodies and the universe as a whole
		uranology
		natural philosophy, physics the science of matter and energy and their interactions; "his favorite subject was physics"
		astrodynamics the branch of astronomy that studies the motion of natural and artificial bodies in space
		astrometry the branch of astronomy that deals with the measurement of the position and motion of celestial bodies
		radio astronomy the branch of astronomy that detects and studies the radio waves emitted by celestial bodies
		celestial mechanics the branch of astronomy concerned with the application of Newton's laws of motion to the motions of heavenly bodies
		astrophysics the branch of astronomy concerned with the physical and chemical properties of celestial bodies
		selenology the branch of astronomy that deals with the moon
		solar physics the branch of astronomy that deals with the sun

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Wiktionary

astronomy (Noun)
The study of the physical universe beyond the Earth's atmosphere, including the process of mapping locations and properties of the matter and radiation in the universe.

Webster DictionaryWebster's Unabridged Dictionary 📘

astronomy (n.)
Astrology.
astronomy (n.)
The science which treats of the celestial bodies, of their magnitudes, motions, distances, periods of revolution, eclipses, constitution, physical condition, and of the causes of their various phenomena.
astronomy (n.)
A treatise on, or text-book of, the science.

OmegaWiki DictionaryOmegaWiki Dictionary Ω

astronomy
The science concerned with celestial bodies and the observation and interpretation of the radiation received in the vicinity of the earth from the component parts of the universe.

Chambers DictionaryChamber's 20th Century Dictionary 📕

astronomy
as-tron′om-i, n. the laws or science of the stars or heavenly bodies.—n. Astron′omer, one versed in astronomy.—adj. Astronom′ic.—adv. Astronom′ically.—v.t. Astron′omise. [Gr. astronomia—astron, star, nomos, a law.]

Sailor's Word-BookThe Sailor's Word-Book ⛵

astronomy
The splendid department of the mixed sciences which teaches the laws and phenomena of the universal system. It is practical when it treats of the magnitudes, periods, and distances of the heavenly bodies; and physical when it investigates the causes. In the first division the more useful adaptation nautical is included (which see).

Wikipedia

Astronomy is the study of planets, stars, galaxies, and other objects found in outer space. Astronomy is one of the oldest sciences. It was done even before history was written. Astronomy should not be confused with astrology, which is not a science.

Early astronomy.

The early astronomers were traders and sailors who needed the stars to guide them at night. Farmers, who needed to find out when planting, flooding, or harvesting times were coming, looked at the rising and setting of certain constellations in the sky. Ancient people who built things like Stonehenge, and the native North American medicine wheels, probably studied the sky for religious or sacred reasons. All these people needed accurate knowledge of the phases of the Moon, the most north and most south seasonal points of the sun, and other information for their purposes.

Some people called astrologers believe they can predict the future by studying where the planets are in the sky when a person is born. Astrology is not regarded as a science these days. In the past, astrology and astronomy were closely linked, and people kept careful records of what they saw. These records have been very important to astronomers during the past two centuries, as they were trying to understand the Universe.

History of astronomy.

Early people studied the stars using only their eyes as telescopes and binoculuars had not yet been invented. People saw some of the planets such as Mars and Venus, and studied Earth's Moon. People made map