The survey has already been running for two decades.
Now, a second space-based observatory will join the endeavor. Over some 200 hours of observation time during its first year, Webb will image half a million early galaxies for the survey. It will use its Near-Infrared Camera to map a subset of Hubble's COSMOS field about three full moons in size. Webb will also map a separate, smaller area with its Mid-Infrared Instrument .
"COSMOS-Webb is the next installment of that, where we're using Webb to extend our coverage in the near- and mid-infrared part of the spectrum, and therefore pushing out our horizon, how far away we're able to see," Kartaltepe said. The goal of COSMOS-Webb is threefold: to examine the Epoch of Reionization and the very earliest stars; to search for early, fully evolved galaxies; and to study the evolution of the mysterious substance scientists call
France Dernières Nouvelles, France Actualités
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