VLA, ALMA Team Up to Give First Look at Birthplaces of Most Current Stars - NRAO: Revealing the Hidden Universe
https://public.nrao.edu/news/pressreleases/deep-galaxy-images
Astronomers have gotten their first look at exactly where most of today's stars were born. To do so, they used the National Science Foundation's Karl G. Jansky
Very Large Array (VLA) and the Atacama Large Millimeter/submillimeter Array (ALMA) to look at distant galaxies seen as they were some 10 billion years ago.
At that time, the Universe was experiencing its peak rate of star formation. Most stars in the present Universe were born then.
"We knew that galaxies in that era were forming stars prolifically, but we didn't know what those galaxies looked like, because they are shrouded in so much dust
that almost no visible light escapes them," said Wiphu Rujopakam, of the Kavli Institute for the Physics and Mathematics of the Universe at the University of
Tokyo and Chulalongkorn University in Bangkok, who was lead author on the research paper.
Radio waves, unlike visible light, can get through the dust. However, in order to reveal the details of such distant -- and faint -- galaxies, the astronomers
had to make the most sensitive images ever made with the VLA.