(labeled & unlabeled) (Credit: NASA/CXC/M. Hubble’s observations also paved the way for future instruments M74 was one of the first targets of the powerful new NASA/European Space Agency/Canadian Space Agency James Webb Space Telescope.Ĭredit: European Space Agency (ESA)/Hubble & NASA, R. Milky Way Galaxy: Side View Schematic illustration of the Milky Way galaxy, showing the prominent spiral arms, the central galactic bulge, the location of the Sun, and selected X-ray sources. Combining observations of the same object from different telescopes across the electromagnetic spectrum gives astronomers far more insight than observations from a single telescope would. There are also lenticular galaxies, which are an intermediate class between elliptical and spiral (labeled S0 in the image), and there are irregular. Spiral galaxies are so named because of their visible and notable arms that wrap around the disk. they are labeled as cD galaxies - dont ask me why theyre called that. A spiral galaxy is a classification given to a massive grouping of stars, space dust, and gas. They also explored the distribution of dust in spiral galaxies this dust is visible in this image as the dark threads winding along the spiral arms of M74.Īside from their quest to understand the history of spiral galaxies, astronomers also observed M74 to complement observations from other telescopes. Spirals are characterized by circular symmetry, a bright nucleus surrounded by a thin outer disk, and a superimposed spiral structure. With long exposures on film, various features such as spiral structure and star. Other galaxies, labeled subtype b, show a less prominent bulge and a larger disk with more extensive spiral arms, more open and with a greater arminterarm. To do this astronomers examined star clusters to date the different parts of spiral galaxies, enabling them to understand how the galaxies assembled over time. The data in this image come from a set of observations exploring the evolution of local spiral galaxies such as M74, which aim to gain insights into the history of star formation in these spirals. Hubble’s Advanced Camera for Surveys, which collected the data in this image, even has a filter designed to pick out only this specific red wavelength of light! These regions,which astronomers refer to as H II regions, mark the location of recent star formation and are an important target for both space- and ground-based telescopes. The beautiful reddish blooms that spread throughout M74 are huge clouds of hydrogen gas which are made to glow by the ultraviolet radiation from hot, young stars embedded within them. Spiral galaxy type B abbreviation Sb have a moderately-sized. Spiral galaxy type A abbreviation Sa they have a big central bulge and smooth, broad spiral arms. M74-also known as the Phantom Galaxy-lies around 32 million light-years away from Earth in the constellation Pisces, and is a familiar sight for Hubble. There are currently 3 classifications of classical spiral galaxies and another 3 for barred spiral galaxies: 1. The arms of the spiral galaxy M74 are studded with rosy pink regions of fresh star formation in this image from the NASA/European Space Agency Hubble Space Telescope.
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