A dwarf galaxy is one that
contains fewer stars than larger galaxies. A dwarf galaxy is a galaxy
made up of material and dark matter ejected from larger galaxies by
the force of gravity. Although a dwarf galaxy is defined by
astronomers by the number of stars it contains, and hence its size,
it is also defined as dwarf by its shape, content, and even
appearance.
Detailed Definition:
Dwarf galaxies, formed from
fragments of larger galaxies, are the most abundant type of galaxy in
the universe. Dwarf galaxies are galaxies that break apart due to
their relatively small size to their neighbors, causing stellar
streams and galaxy mergers. However dynamic these relationships with
neighboring galaxies may be, they are difficult to detect by
astronomers due to their low light, mass and small size. The
astronomical importance of these dwarf galaxies actually comes from
their tendency to form from other large galaxies and merge again with
larger galaxies. Their difference from the usual galaxy shape is that
they have low metallicity and gas in abundance. This situation is
used by astronomers as evidence to interpret the motion and evolution
of galaxies. Dwarf galaxies are basically divided into three groups:
Dwarf elliptical galaxies, dwarf spheroidal galaxies, and dwarf
irregular galaxies.
Etymology:
From
Old English ‘Dweorg’
+ From Latin ‘Galaxias’
Sample Sentence(s):
‘’The most powerful
space telescope currently operating has zoomed in on a lonely dwarf
galaxy in our galactic neighborhood, imaging it in stunning detail.’’
‘’This
Living Collection starts with an introductory Comment and continues
with a series of articles on the science of dwarf galaxies, their
properties and their theoretical modelling and simulations.’’
(It’s
time for some plane speaking.
(2021, December 13).
Nature. https://www.nature.com/collections/bgegjajcec
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Translations of
Terms/Concepts into Partner Languages:
