File:Milky Way galaxy1.jpg
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Summary
[edit]DescriptionMilky Way galaxy1.jpg |
English: Like early explorers mapping the continents of our globe, astronomers are busy charting the spiral structure of our galaxy, the Milky Way. 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 stars. Previously, our galaxy was thought to possess four major arms.
This artist's concept illustrates the new view of the Milky Way, along with other findings presented at the 212th American Astronomical Society meeting in St. Louis, Mo. The galaxy's two major arms (Scutum-Centaurus and Perseus) can be seen attached to the ends of a thick central bar, while the two now-demoted minor arms (Norma and Sagittarius) are less distinct and located between the major arms. The major arms consist of the highest densities of both young and old stars; the minor arms are primarily filled with gas and pockets of star-forming activity. The artist's concept also includes a new spiral arm, called the "Far-3 kiloparsec arm," discovered via a radio-telescope survey of gas in the Milky Way. This arm is shorter than the two major arms and lies along the bar of the galaxy. Our sun lies near a small, partial arm called the Orion Arm, or Orion Spur, located between the Sagittarius and Perseus arms. |
Date | |
Source | https://www.nasa.gov/sites/default/files/thumbnails/image/main_milkyway-full_nasa_jpl-caltech.jpg |
Author | National Aeronautics and Space Administration |
Licensing
[edit]Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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Image title |
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Author | Spitzer Space Telescope |
Credit/Provider | NASA/JPL-Caltech/R. Hurt (SSC/Caltech) |
Headline | Like early explorers mapping the continents of our globe, astronomers are busy charting the spiral structure of our galaxy, the Milky Way. 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 stars. |
Source | Spitzer Space Telescope |
Short title |
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Usage terms |
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Date and time of data generation | 3 June 2008 |
Width | 2,400 px |
Height | 2,589 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CC 2018 (Macintosh) |
File change date and time | 09:56, 19 October 2020 |
Color space | Uncalibrated |
Copyright status | Copyright status not set |
Date and time of digitizing | 05:54, 19 October 2020 |
Date metadata was last modified | 05:56, 19 October 2020 |
Unique ID of original document | xmp.did:20469984-1fd8-4e6a-9641-30c4f60942e7 |
Contact information |
http://www.spitzer.caltech.edu 1200 E. California Blvd. Pasadena, CA, 91125 USA |
Keywords | Milky Way |
IIM version | 2 |