The JADES program is one of the largest programs using Webb's incredible technology and aims to answer key questions about the universe.
“This infrared image from NASA’s James Webb Space Telescope was taken for the JWST Advanced Deep Extragalactic Survey, or JADES, program. It shows a portion of an area of the sky known as GOODS-South, which has been well studied by the Hubble Space Telescope and other observatories. More than 45,000 galaxies are visible here.” | Credits: NASA, ESA, CSA, Brant Robertson , Ben Johnson , Sandro Tacchella , Marcia Rieke , Daniel Eisenstein . Image processing: Alyssa Pagan .
This relatively recent image of GOODS-South was captured by Hubble in 2016. It’s a very impressive image, rich with galaxies, but Webb has been able to peer much further back in time thanks to its relatively higher resolution and sensitivity.
“Almost every single galaxy that we are finding shows these unusually strong emission line signatures indicating intense recent star formation. These early galaxies were very good at creating hot, massive stars,” says Endsley.The bright, massive stars in turn fired torrents of ultraviolet light off into space, which changed the nature of surrounding gas from opaque to transparent. This was achieved through ionization, which is the process of removing electrons from their nuclei.
“By studying these galaxies, astronomers can explore how star formation in the early years after the big bang was different from what is seen in current times. The light from faraway galaxies is stretched to longer wavelengths and redder colors by the expansion of the universe — a phenomenon called
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