These observations will reveal clues about its supermassive black hole (Sagittarius A*), the stars that orbit it, and the densely-packed "galactic bulge" surrounding it. This includes the center of the Milky Way Galaxy, which has been very difficult to observe because of all the cosmic dust between it and Earth. Given its advanced suite of infrared optics, the JWST is well-suited to study the nuclei of these galaxies and observe the forces that drive things like star-formation, supermassive black holes, relativistic jets, etc.Īmong its many scientific objectives, Webb will study parts of the universe that are largely inaccessible in visible light astronomy, such as molecular clouds (star-forming regions), the circumstellar disks that give rise to planets, and the cores of active galaxies. Such galaxies are estimated to account for two-thirds of all spiral galaxies in the universe, and their study could reveal things about the formation and evolution of our own. NGC 1365 and other barred spiral galaxies are of great interest to astronomers thanks to new observations that indicated that the Milky Way could also be a barred spiral galaxy. A typical spiral galaxy comprises a nucleus, a disc, a corona or halo, and spiral. As the name suggests spiral galaxy looks like spirals, with long arms winding toward a bright bulge at the center. Bright patches are also peppered throughout the two larger arms, which appear more like extended archipelagos than single structures. Spiral galaxy is the most common galaxy types in the universe: about 77 of the observed galaxies in the universe are spiral galaxies. The glowing center shows the SMBH (the bright dot in the middle) and halo-shaped star-forming region, and illuminated dust surrounding it. This includes the most-detailed look at the central barred region and the many smaller, wispier arms extending from it. The image was acquired by Webb's Mid-Infrared Instrument (MIRI) and offers new insights into this galaxy's inner workings. ![]() It is also suspected that this region arose from a combination of dynamical instabilities in the region, possibly due to stellar orbits, density waves, the overall rotation of the disk, and the likelihood that the inner bar more rapidly than the larger bar. Bars are found in up to 65 of spiral galaxies. In particular, its second bar is more prominent in infrared images, and previous instruments (like the Hubble and Spitzer space telescopes) have been limited in terms of what they could visualize.Īstronomers theorize that this bar plays a crucial role in the galaxy's evolution, drawing gas and dust to the core, forming new stars, and feeding the supermassive black hole (SMBH), which is about two million solar masses and rotates at close to the speed of light. A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure made of stars. The galaxy was selected for observations by JWST because of its iconic nature and how much of its interior structure is obscured by dust. Measuring over 200,000 light-years in diameter, roughly twice as large as the Milky Way, NGC 1365 is noted for the way its wide arms extend from its central bar to give it a Z-like appearance.
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