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An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. [1] 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. [2]
3 ημέρες πριν · The smallest irregular galaxies have diameters of thousands of light-years. Irregular galaxies make up 25% of all galaxies in the observable universe. Ages of irregular galaxies range from 100 million to 1 billion years. Irregular galaxies can emit as much light as 10^11 suns, despite their small size. The Large and Small Magellanic Clouds are ...
10 Ιαν 2020 · These odd, blobby ones are called "irregular" galaxies. Sometimes they get lumped in with the so-called "peculiar" galaxies due to their unusual shapes or other characteristics. Hubble Space Telescope's deepest view of the cosmos. There are hundreds of galaxies of all shapes and sizes in this image. NASA/ESA/STScI.
25 Νοε 2024 · Galaxy - Irregular, Star Clusters, Nebulae: Most representatives of this class consist of grainy, highly irregular assemblages of luminous areas. They have neither noticeable symmetry nor an obvious central nucleus, and they are generally bluer in colour than are the arms and disks of spiral galaxies.
28 Μαΐ 2024 · Evolution and Features of Irregular Galaxies. Irregular galaxies are notable for their active star-forming regions, which are often illuminated by clusters of young, hot stars. These areas appear as bright, nebulous patches against the darker backdrop of the galaxy.
The dwarf irregular galaxy NGC 4214 resides about 10 million light-years away. The galaxy's relative proximity, combined with the wide variety of evolutionary stages among its stars, make it an ideal laboratory to research the triggers of star formation and evolution.
Galaxies that don't have a spiral or elliptical shape are often called irregular galaxies. NGC 1427A here is an irregular galaxy, and if you look closely, you can see a spiral galaxy off to the left in the distance. Image by NASA, ESA, and The Hubble Heritage Team (STScI/AURA).
