- Overview
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the … See more
Spiral galaxy - Wikipedia
A spiral galaxy is a type of galaxy with a flat, rotating disk of stars, gas and dust, and a central bulge. It has spiral arms that extend from the center into the disk, where star formation occurs. Learn more about the components, classification and examples of spiral galaxies. See more
The Beauty and Mystery of Spiral GalaxiesGalaxies are huge collections of stars, gas, and dust that populate the universe. One of the most common and stunning types of galaxies is the spiral galaxy.StructureSpiral galaxies may consist of several distinct components:
• A flat, rotating disc of stars and interstellar matter of which spiral arms are prominent components
• A central stellar bulge of mainly older stars… See moreOrigin of the spiral structureThe pioneer of studies of the rotation of the Galaxy and the formation of the spiral arms was Bertil Lindblad in 1925. He realized that the idea of stars arranged permanently in a spiral shape was untenable. Since the angular sp… See more
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- The Milky WayThe Milky Way is a barred spiral galaxy with two major arms and a number of minor arms or spurs123. The Perseus Spiral Arm is one of the two major arms, with a radius of approximately 10.7 kiloparsecs1. It is located between the minor Cygnus and Carina–Sagittarius Arms and is named after the Perseus constellation1. Using infrared images from NASA's Spitzer Space Telescope, scientists have discovered that the Milky Way's elegant spiral structure is dominated by just two arms wrapping off the ends of a central bar of stars2.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.The Milky Way is a barred spiral galaxy with two major arms and a number of minor arms or spurs. The Perseus Spiral Arm, with a radius of approximately 10.7 kiloparsecs, is located between the minor Cygnus and Carina–Sagittarius Arms. It is named after the Perseus constellation in the direction of which it is seen from Earth.en.wikipedia.org/wiki/Perseus_ArmUsing infrared images from NASA's Spitzer Space Telescope, scientists have discovered that the Milky Way's elegant spiral structure is dominated by just two arms wrapping off the ends of a central bar of stars. Previously, our galaxy was thought to possess four major arms. The annotated artist's concept illustrates the new view of the Milky Way.science.nasa.gov/resource/the-milky-way-galaxy/This image, assembled from data from NASA’s Spitzer mission, shows that the Milky Way Galaxy has a modest bar in its central regions. Two spiral arms, Scutum-Centaurus and Perseus, emerge from the ends of the bar and wrap around the bulge.openstax.org/books/astronomy-2e/pages/25-2-spir…
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Which Milky Way spiral arm is ours? - EarthSky
May 14, 2024 · Learn how our sun and planets are located on the edge of a minor spiral arm of the Milky Way galaxy, called the Orion Arm or Local Arm. Find out why this position might be important for life on...
Spiral arm - Wikipedia
Spiral arms are a defining feature of spiral galaxies. They manifest as spiral-shaped regions of enhanced brightness within the galactic disc. Typically, spiral galaxies exhibit two or more spiral arms. The collective configuration of these arms is referred to as the spiral pattern or spiral structure of the galaxy.
The appearance of spiral sleeves is quite diverse. Grand design spiral galaxies exhibit …Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 9 mins
Spiral Galaxy Facts & Definition | Space
Nov 19, 2018 · Learn what spiral galaxies are, how they form, and why they are so common in the universe. See examples of spiral galaxies, such as the Milky Way, and how they differ from elliptical and...
- Author: Nola Taylor Tillman
- Estimated Reading Time: 3 mins
Perseus Arm - Wikipedia
The Perseus Arm is one of the two major spiral arms of the Milky Way galaxy, named after the constellation Perseus. It contains the Double Cluster and several Messier objects, and is …
25.3: Spiral Structure - Physics LibreTexts
Jul 29, 2023 · Learn how the Milky Way Galaxy has two major spiral arms that emerge from the bar and several fainter arms and spurs. Find out how differential galactic rotation and other processes create and maintain spiral structure in …
13.2: Spiral Structure - Physics LibreTexts
Learn how spiral arms form and evolve in disk galaxies like the Milky Way. See how differential galactic rotation, star formation, and galaxy evolution affect the appearance and features of spiral arms.
The Astrophysics Spectator: Spiral Galaxies
Most spiral galaxies have two arms. The Milky Way is a spiral galaxy, perhaps of type Sbc. The basic structure of a spiral galaxy is a disk within a spheroid rotating around a dense core of …
Astronomy & Astrophysics 101: Spiral Galaxy
Mar 15, 2022 · A spiral galaxy is a type of galaxy with a rotating disc and spiral arms that curve out from a dense central region. Learn about the four categories of spiral galaxies, their structure, evolution, and how Hubble has observed …
Spiral Galaxies | Ask An Earth and Space Scientist
Typically these galaxies have two arms, but there have been some observed to have four, five, or even six arms. An image of Messier 81, a spiral galaxy, taken with the Hubble Space …
Spiral Galaxy NGC 4254’s Dazzling Swirls - NASA
Feb 13, 2024 · NGC 4254 is a spiral galaxy with clearly defined arms and a possible supermassive black hole at its center. See its stunning details in near- and mid-infrared light …
Spiral Galaxy - Science@NASA
Dec 16, 2011 · See a stunning Hubble Space Telescope image of M74, a nearby grand-design spiral galaxy with symmetrical arms and star formation regions. Learn about its location, size, …
25.2 Spiral Structure - Astronomy 2e - OpenStax
Our radio observations of the disk’s gaseous component indicate that the Galaxy has two major spiral arms that emerge from the bar and several fainter arms and shorter spurs. You can …
‘Blood-Soaked’ Eyes: NASA’s Webb, Hubble Examine Galaxy Pair
6 days ago · The diffuse, tiny spiral arms between IC 2163’s core and its far left arm may be an example of this activity. Even more tendrils look like they’re hanging between the galaxies’ …
How the Milky Way Got its Spiral Arms - astrobites
Oct 22, 2018 · The spiral arms of galaxies are among the most recognizable galactic features, yet we still know little about their precise formation mechanism. Today’s paper leverages new …
Astroquizzical: Why do galaxies have two spiral arms?
Jul 28, 2015 · Only a small fraction of galaxies actually have two spiral arms! Even if we ignore the entire class of galaxies dubbed “ellipticals”, which have no spiral arms at all, there are a ton …
Spiral Structure | Astronomy - Lumen Learning
Learn about the structure and formation of the Milky Way Galaxy, a spiral disk with two major arms and several fainter ones. See diagrams, images, and models of the Galaxy's spiral arms …
Hubble Unveils Explosive Supernova in Stunning Spiral Galaxy
23 hours ago · Like other spiral galaxies, its disk is filled with billions of stars that create a stunning glow. Along its two prominent spiral arms, clouds of hydrogen gas emit a vivid red …
New Insights on How Spiral Galaxies Get Their Arms
Apr 2, 2013 · Some recent studies have explored the likelihood that spiral galaxies with a close neighbor (a nearby dwarf galaxy, for example) get their arms as gravity from the satellite …
26.2: Types of Galaxies - Physics LibreTexts
Apr 11, 2022 · Learn about the properties and features of elliptical, spiral, and irregular galaxies, and how they differ in shape, size, and star formation. Spiral galaxies have a central bulge, a …
NGC 4622 - Wikipedia
NGC 4622 is a spiral galaxy with leading and trailing spiral arms in the constellation Centaurus. It is also known as the Backward galaxy because of its unusual arm structure and has had …
Spiral arms - Galaxy Map
The Perseus arm is one of the two major spiral arms of the Milky Way. Like the Centaurus arm, it contains many massive hydrogen clouds and many red giants prominent in infrared. It is the …
Spiral Galaxy Arm Wraps Around Companion In Amazing …
4 days ago · Space. Spiral Galaxy Arm Wraps Around Companion In Amazing Imagery. Posted: November 2, 2024 | Last updated: November 2, 2024. US Department of Energy-fabricated …
Observations explore the properties of giant spiral galaxy UGC 2885
Oct 29, 2024 · Located some 232 million light years away, UGC 2885, also known as Rubin's galaxy, is a barred spiral galaxy in the constellation Perseus. With an estimated radius of …
‘Blood-soaked’ eyes: Webb and Hubble examine galaxy pair
Apr 25, 2024 · The diffuse, tiny spiral arms between IC 2163’s core and its far left arm may be an example of this activity. Even more tendrils appear to be hanging between the galaxies’ cores. …