BACKYARD GALAXY Meaning and
Definition
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A "backyard galaxy" refers to a particular type of galaxy, often dwarf galaxies, that is relatively close to the Milky Way or any other galactic system. These galaxies are generally smaller in size and mass compared to their larger counterparts and are typically located within the immediate vicinity of larger galaxies, hence the term "backyard."
The term "backyard galaxy" is derived from the idea that these galaxies appear to be inhabitants of the cosmic "backyard" of larger galactic systems, residing in the surrounding space. Since they are in close proximity to our own galaxy, they represent an area of scientific interest for astronomers and cosmologists. These galaxies are considered important objects for study as they can provide valuable insights into the formation and evolution of galaxies in general.
Backyard galaxies are often characterized by low luminosity, irregular morphology, and relatively low levels of star formation activity. Dwarf galaxies are the most common type of backyard galaxies, and they can be further categorized based on their specific characteristics, such as elliptical or irregular shape, presence of dark matter, and distance from the host galaxy. Their close location to larger galaxies also makes it easier to observe and study them, providing important data to bolster our understanding of the universe and its structures. In summary, a backyard galaxy refers to a smaller, often dwarf, galaxy located near a larger galactic system, which offers valuable insights into the nature of galaxies and their evolution.
