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Westerhout 51

Westerhout 51, or simply W51, is a massive star formation region in the Milky Way galaxy located 17,000 light years from Earth in the constellation of Sagittarius. It is one of the most active regions of star formation in the galaxy, forming many O-type stars. It can be split up into three points of interest: two star formation regions named W51A and W51B, along with a supernova remnant named W51C. The region has copious amounts of molecular gas totaling ~6x10^5 solar masses. Much of the gas has been observed traveling up to 20 kilometers per second.

Components
W51A 's NIRCam with IRS 2 being located in the yellow circular cloud in the middle. W51-E is inside the large yellow crescent in the lower half of the middle. Westerhout 51A is a star formation region within W51. Towards its center there is a Hll region known as G49.5-0.4. Another region known as G49.57−0.27 is located ~15 parsecs north. W51A contains two notable bright star clusters named IRS 1 and IRS 2. Also within W51A are four concentrated clumps of gas all within a relatively small area of 5 parsecs. A knot north of IRS2 seen in molecular hydrogen and iron [Fe II] is likely the most energetic example of a protostellar jet driven by a massive star and impacting dense interstellar medium. W51C This is a supernova remnant located in Westerhout 51. == References ==
Source: Wikipedia ↗
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