Astronomy – Definition & Meaning

Astronomy is a fascinating and complex field of study that involves the exploration of celestial objects and phenomena. For centuries, humans have been fascinated by the stars, planets, and other celestial bodies that make up our universe. Astronomy is the scientific study of these objects and their properties, as well as the relationships between them.


Astronomy can be defined as the study of the universe and its contents. It is the scientific study of celestial objects, including stars, planets, galaxies, and other objects in space. It also involves the study of the properties and behavior of these objects, as well as their interactions with each other.


The origins of astronomy can be traced back to ancient civilizations, such as the Babylonians and Egyptians, who used observations of the stars and planets to develop calendars and predict astronomical events. The Greeks also made significant contributions to the field of astronomy, with notable figures like Aristotle and Ptolemy developing theories about the nature of the universe.

Meaning in different dictionaries

According to the Merriam-Webster dictionary, astronomy is defined as “the study of objects and matter outside the earth’s atmosphere and of their physical and chemical properties.” The Oxford English Dictionary defines it as “the branch of science that deals with celestial objects, space, and the physical universe as a whole.”


Astronomy is often associated with other fields of science, such as physics, chemistry, and mathematics. It is also closely related to the field of astrophysics, which focuses on the physical properties and behavior of celestial objects.


Some synonyms for astronomy include astrophysics, cosmology, and celestial mechanics.


There are no direct antonyms for astronomy, as it is a specific field of study. However, some antonyms for related terms might include terrestrial, earthbound, or atmospheric.

The same root words

Some words that share the same root as astronomy include astrologer, astrology, and astral.

Example Sentences

  1. The study of astronomy has led to many important discoveries about the nature of our universe.
  2. Astronomers use powerful telescopes to observe distant galaxies and stars.
  3. The field of astronomy is constantly evolving as new technologies and techniques are developed.
  4. Many ancient cultures used astronomy to track the movements of celestial bodies and develop calendars.
  5. The study of astronomy requires a strong understanding of physics, mathematics, and other sciences.
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