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1,000 pc 3.09×10 16: Projection effect of the Radcliffe wave and Split linear structures , [32] between which the Sun is currently travelling. [33] Orion Arm: 3000 pc (length) 9.26×10 16: The spiral arm of the Milky Way Galaxy through which the Sun is currently travelling. Orbit of the Solar System: 17,200 pc 5.31×10 17
The spiral arms are colored differently in order to highlight what structure belongs to which arm. H II regions are marked as dots colored in the same color as their spiral arm. They come in three sizes, measured by the excitation parameter U: small - U > 200 pc cm-2; medium - 200 > U > 110 pc cm-2; large - 110 > U > 70 pc cm-2; Date: 9 June ...
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J. L. E. Dreyer assigned it the identifiers 2903 and 2905 in his New General Catalogue; NGC 2905 now designates a luminous knot in the northeastern spiral arm. [11] This field galaxy [12] is located about 30 [3] million light-years away from the Milky Way, and is a member of the Virgo Supercluster. [4]
The yellow dot indicates the position of the Sun, the red dots the position of the embedded clusters, which serve as indicators of the spiral structure It is challenging to ascertain the presence of spiral arms in the disc of our galaxy through optical observation, given that the Sun is situated within the plane of the Milky Way disc, and the ...
The Far 3 kpc Arm was discovered in 2008 by astronomer Tom Dame while preparing a talk on the galaxy's spiral arms for a meeting of the 212th American Astronomical Society. It is one of the spiral arms of the Milky Way and it is located in the first galactic quadrant at a distance of 3 kiloparsecs (9,800 light-years ) from the Galactic Center .
Dark sky image with some objects around Pinwheel Galaxy (M 101). The quarter in the lower right shows the tail of Ursa Major with the stars Mizar, Alcor and Alkaid.. The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on, unbarred, and counterclockwise spiral galaxy located 21 million light-years (6.4 megaparsecs) [5] from Earth in the constellation Ursa Major.
It is named for its distance (more accurately, 3.3 kpc) from the Galactic Center. [3] It is about 5.2 kpc from the Sun, and is located in the fourth galactic quadrant. [2] The last attempt to search for star forming regions in the Near 3 kpc Arm (in 1980) showed little star formation occurring in the numerous molecular clouds of this arm. [4] [5]