Entity: GALAXY
A galaxy is a vast system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. It is a collection of celestial bodies rotating around a central object.
GALAXY
Etymology
The term 'galaxy' is derived from the Greek word 'galaxias' (γαλαξίας), meaning 'milky', in reference to the Milky Way galaxy that contains the Solar System.
Definition
A galaxy is a vast system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. It is a collection of celestial bodies rotating around a central object.
Historical Context
Throughout history, galaxies have been studied and observed by astronomers, leading to a deeper understanding of the universe's vastness and complexity. The concept of galaxies has evolved over time with advancements in technology and scientific research.
Cultural Significance
Galaxies have captured the imagination of humans for centuries, inspiring art, literature, and scientific exploration. They symbolize the infinite possibilities and mysteries of the cosmos, sparking curiosity and wonder about the universe.
Related Concepts
- Milky Way System
- Spiral Galaxy
- Island Universe
- Extragalactic Nebula
See Also
A galaxy refers to a massive assemblage of stars, planets, interstellar gas, dust, and dark matter held together by gravitational forces.