European Space Agency (ESA) December 13, 2021
The James Webb Space Telescope (JWST) is NASA’s next great observatory; it follows the Hubble Space Telescope, Compton Gamma-ray Observatory, Chandra X-ray Observatory, and Spitzer Space Telescope. JWST combines the qualities of its two predecessors, viewed under infrared light, such as Spitzer, with high resolution, such as Hubble. Image source: NASA, SkyWorks Digital, Northrop Grumman, STScI
The James Webb Space Telescope (Webb) aims to answer basic questions about the universe.
Its sensitivity is 100 times that of NASA/European Space Agency Hubble Space Telescope, and its mirror is almost twice the size of the European Space Agency’s Herschel Space Observatory. It can detect the formation of galaxies more than 13.5 billion years ago. Infrared light. big Bang.
For the first time in human history, we have the opportunity to directly observe the first stars and galaxies that formed in the early universe. When we look at something a million light years away, what we see is actually what it looked like a million years ago: we are looking back to the past.
Light from galaxies billions of light-years away travels through the expanding universe to reach us, which causes its wavelength to extend to infrared. Weber's infrared vision made it a powerful time machine, dating back to 13.5 billion years ago, shortly after the Big Bang.
Some of Hubble's most striking images are its "deep field," which uses long exposures-several days-to capture thousands of galaxies in a single image. They revealed the most distant galaxies ever observed and showed us small, compact and irregular young galaxies that are only a few hundred million years old.
Weber's infrared sensitivity will not only go back farther in time, but will also reveal more information about stars and galaxies in the early universe. Weber's data will also answer convincing questions about how black holes formed and grew at an early stage, and what effect they had on the formation and evolution of the early universe.
Webb is an international partnership between NASA, ESA and the Canadian Space Agency (CSA).
The current meme: "...Webb's infrared vision makes it a powerful time machine, dating back to 13.5 billion years ago, back to the era shortly after the Big Bang..." https://naturesalltheres.blogspot.com/
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