JWST Discovered The Farthest Star Ever Seen! - YouTube - PBS Space Time - astrophysics/cosmology - 2023 episode

The NASA/ESA Hubble Space Telescope first discovered the Blue Giant star Earendel,a name that means "morning star."It couldn't tell us much about it because it discovered it with its ultraviolet mode.It took the NASA/ESA/CSA James Webb Space Telescope,which has a mirror 50x larger than Hubble's,to begin to unravel Earendel's mysteries.Earendel is 28 billion light years from Earth with a redshift of 6.2.Both discoveries were made with a phenomenon predicted by Einstein's General Theory of Relativity called gravitational lensing,in which a celestial object with a large gravitational field warps spacetime,in this case a galaxy cluster,such that an object in the background is magnified greatly,giving us a view into the early universe.Earendel is a class b blue giant star with a mass at least 50,000 times larger than the Sun's and has a surface temperature of at least 50,000 degrees Kelvin/89,540.33 degrees F.Earendel is also believed to have a red giant companion.It is possibly one of the first generation of stars that emerged out of the dark matter that remained after the Big Bang.*Cosmology is the study of the origin,evolution and structures of the universe.*Dr.Matt O'Dowd is an Australian astrophysicist and the presenter and writer or co-writer of PBS Space Time.*Further studies are ongoing to refine the information.