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Understanding how star-forming works at a galactic scale is challenging in our Milky Way. While we have a general understanding of the layout of our galaxy, we can\u2019t see all of the details head-on like we would want to if we were exploring a single galaxy for details of star formation. Luckily, we have a pretty good view of the entirety of one of the most famous galaxies in all of astronomy \u2013 M51, the Whirlpool Galaxy. Now, a team of researchers from the Max Planck Institute for Astronomy has completed a survey of molecules throughout the galaxy and developed a map of potential star-forming regions.<\/p>\n
<\/p>\n Tracking star formation from far away is best done by monitoring cold clouds of gas and dust formed as part of the creation process. These clouds can span entire galaxies and are tracked by astronomers using two types of molecules \u2013 hydrogen cyanide (HCN) and diazenylium (N2<\/sub>H+).\u00a0<\/p>\n Typically, these molecules interact with hydrogen floating in interstellar space and are spun up with some rotational speed. If that rotation is slowed down, say by interacting with other molecules, they emit a specific radio frequency signal at a three-millimeter wavelength.<\/p>\n \n