File:Small but significant (35667298284).jpg

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DescriptionSmall but significant (35667298284).jpg	The subject of this Hubble Space Telescope image is a dwarf galaxy named NGC 5949. Thanks to its proximity to Earth — it sits at a distance of around 44 million light-years from us, placing it within the Milky Way’s cosmic neighborhood — NGC 5949 is a perfect target for astronomers to study dwarf galaxies. With a mass of about a hundredth that of the Milky Way, NGC 5949 is a relatively bulky example of a dwarf galaxy. Its classification as a dwarf is due to its relatively small number of constituent stars, but the galaxy’s loosely bound spiral arms also place it in the category of barred spirals. This structure is just visible in this image, which shows the galaxy as a bright yet ill-defined pinwheel. Despite its small proportions, NGC 5949’s proximity has meant that its light can be picked up by fairly small telescopes, something that facilitated its discovery by the astronomer William Herschel in 1801. Astronomers have run into several cosmological quandaries when it comes to dwarf galaxies like NGC 5949. For example, the distribution of dark matter within dwarfs is quite puzzling (the “cuspy halo” problem), and our simulations of the universe predict that there should be many more dwarf galaxies than we see around us (the “missing satellites” problem).
Date	21 February 2017, 18:23
Source	Small but significant
Author	NASA Hubble Space Telescope

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This image was originally posted to Flickr by NASA Hubble at https://flickr.com/photos/144614754@N02/35667298284 (archive). It was reviewed on 13 July 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

13 July 2018

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	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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current	15:32, 13 July 2018		1,041 × 543 (76 KB)	Hiàn (alt) (talk \| contribs)	Transferred from Flickr via #flickr2commons

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Credit/Provider	ESA/Hubble & NASA
Source	ESA/Hubble
Short title	Small but significant
Image title	The subject of this NASA/ESA Hubble Space Telescope image is a dwarf galaxy named NGC 5949. Thanks to its proximity to Earth — it sits at a distance of around 44 million light-years from us, placing it within the Milky Way’s cosmic neighbourhood — NGC 5949 is a perfect target for astronomers to study dwarf galaxies. With a mass of about a hundredth that of the Milky Way, NGC 5949 is a relatively bulky example of a dwarf galaxy. Its classification as a dwarf is due to its relatively small number of constituent stars, but the galaxy’s loosely-bound spiral arms also place it in the category of barred spirals. This structure is just visible in this image, which shows the galaxy as a bright yet ill-defined pinwheel. Despite its small proportions, NGC 5949’s proximity has meant that its light can be picked up by fairly small telescopes, something that facilitated its discovery by the astronomer William Herschel in 1801. Astronomers have run into several cosmological quandaries when it comes to dwarf galaxies like NGC 5949. For example, the distribution of dark matter within dwarfs is quite puzzling (the “cuspy halo” problem), and our simulations of the Universe predict that there should be many more dwarf galaxies than we see around us (the “missing satellites” problem).
Usage terms	Creative Commons Attribution 4.0 International License
Date and time of data generation	06:00, 7 August 2017
Software used	Adobe Photoshop CC 2017 (Windows)
File change date and time	18:23, 21 February 2017
Date and time of digitizing	13:15, 13 December 2016
Date metadata was last modified	19:23, 21 February 2017
Unique ID of original document	xmp.did:263ac0ce-335e-1e43-b039-5b08c3d373e3
Keywords	NGC 5949
Contact information	http://www.spacetelescope.org Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany
IIM version	4

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21 February 2017