Finishing Honest Hearts DlC

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Published on December 29, 2022 9:30:07 PM ● Video Link: https://www.youtube.com/watch?v=HJ7EUXwWNew

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Honest Hearts @CALL IN NUMBER IS 325-754-7084 Launch of the SPHEREx mission

Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer (SPHEREx) is a NASA observatory that performs an all-sky survey of more than 300 million galaxies, along with 100 million individual stars in our own Milky Way galaxy. It is designed to improve the understanding of both how our universe evolved and how common are the ingredients for life in our galaxy's planetary systems.

Among the specific objectives are:

• Constraining the physics of inflation, by measuring its imprints on the three-dimensional large-scale distribution of matter;

• Tracing the history of galactic light production through a deep multi-band measurement of large-scale clustering;

• Investigating the abundance and composition of water and biogenic ices in the early phases of star and planetary disk formation.

SPHEREx uses a spectrophotometer to observe in the near-infrared, mapping the entire sky four times during its nominal 25-month mission. It classifies galaxies according to redshift accuracy, fitting measured spectra to a library of galaxy templates. Specifically, it probes the signals from "intra-halo light" (rogue stars torn from their host galaxies) and signals from the epoch of reionisation (arguably the least understood period in the lifetime of the Universe, marking the point when the first stars ignited and ended the "Dark Ages"). It studies what drove the early universe inflation, explores the origin and history of galaxies, and determines the origin of water in planetary systems.

SPHEREx complements the Euclid observatory, but its lower redshift survey allows its measurement of inflationary parameters to be mostly independent to provide a new line of evidence. The mission creates a map of the entire sky in 96 different colour bands, far exceeding the colour resolution of previous all-sky maps. It also identifies targets for more detailed study by NASA's James Webb Space Telescope.

SPHEREx is launched in mid-2024.*