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Dwarf Irregular Galaxies
An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. Irregular galaxies do not fall into any of the regular classes of the Hubble sequence, and they are often chaotic in appearance, with neither a nuclear bulge nor any trace of spiral arm structure. This absence of structure in an irregular galaxy leads to little density waves in these galaxies. This makes irregular galaxies prime areas to study star formation without the effects of density waves. Collectively they are thought to make up about a quarter of all galaxies. Some irregular galaxies were once spiral or elliptical galaxies but were deformed by an uneven external gravitational force. Irregular galaxies may contain abundant amounts of gas and dust. This is not necessarily true for dwarf irregulars. Irregular galaxies may also be formed in galaxy collisions. Irregular galaxies are commonly small, about one tenth the mass of the Milky Way galaxy, though ther ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irregular Galaxy NGC 1427A (captured By The Hubble Space Telescope)
Irregular, irregulars or irregularity may refer to any of the following: Astronomy * Irregular galaxy * Irregular moon * Irregular variable, a kind of star Language * Irregular inflection, the formation of derived forms such as plurals in unpredictable ways ** Irregular verb Law * Against regulations * In canon law, an Canonical impediment#Irregularities, irregularity is an impediment for the Catholic priesthood or for exercising orders already received Mathematics * Irregularity of a surface * Irregularity of distributions * Irregularity index Medicine * Irregular bone * Arrhythmia, also known as an irregular heartbeat * Constipation, also called "irregularity" Other * ''The Irregulars'', a 2021 Netflix series * Accounting irregularity * Irregular military * Irregular chess opening See also * Anomaly (other) * Baker Street Irregulars * Regular (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |