Young stars’ impact on galaxy evolution explored with PHANGS program The saying goes, ‘From a tiny acorn grows the mighty oak.’ This is accurate not just here on Earth, but in our solar system and beyond. Even on a galactic scale, where individual stars and star clusters can sculpt a galaxy's overa
Scientists are getting their first look with NASA’s James Webb Space Telescope’s powerful resolution at how the formation of young stars influences the evolution of nearby galaxies. Webb MIRI image of NGC 7496, cropped and digitally enhanced. Credit: Science: NASA, ESA, CSA, Janice Lee , Image Processing: Joseph DePasquale The saying goes, ‘From a tiny acorn grows the mighty oak.’ This is accurate not just here on Earth, but in our solar system and beyond.
Webb’s image of NGC 1433 is a strong display of how dynamic processes associated with forming stars influence the larger structure of an entire galaxy. NGC 1365, observed here by Webb’s Mid-Infrared Instrument , is one of a total of 19 galaxies targeted for study by the Physics at High Angular resolution in Nearby Galaxies collaboration.
NGC 1365 is a double-barred spiral galaxy that lies about 56 million light years away from Earth in the constellation Fornax. It’s one of the largest galaxies currently known to astronomers, spanning twice the length of the Milky Way across.“The clarity with which we are seeing the fine structure certainly caught us by surprise,” said team member David Thilker of Johns Hopkins University in Baltimore, Maryland.
The spiral arms of NGC 7496, one of a total of 19 galaxies targeted for study by the Physics at High Angular resolution in Nearby Galaxies collaboration, are filled with cavernous bubbles and shells overlapping one another in this image from Webb’s Mid-Infrared Instrument . These filaments and hollow cavities are evidence of young stars releasing energy and, in some cases, blowing out the gas and dust of the interstellar medium surrounding them.
The high-resolution imaging needed to study these structures has long evaded astronomers – until Webb came into the picture.
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