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.

Watch the R Aquarii binary star system evolve in Hubble imagery time-lapse - YouTube - Space.com - astrophysics

The NASA/ESA Hubble Space Telescope has captured imagery of the R Aquarri binary star system from 2014-2023.The images have been time-lapsed to show the evolution of the region.R Aquarri is a symbiotic star system in the constellation Aquarius.It is believed to be a coupling of a white dwarf star with a Mira-type variable star,a red giant.The orbital period is about 44 years.It has a distance of about 218 parsecs/711 light years,so is right next door.By its gravitational pull,the white dwarf draws in material from the red giant and sometimes ejects some of the surplus in loops to form the nebula seen in the NASA/ESA Hubble Space Telescope images.The red giant star both pulsates and changes temperature,causing a very large change in brightness.Its brightness has a total range of 750 times.The pulsations occur every 390 days,give or take some days.*Material by Space.com and edited and augmented by Andrew Taylor

Betelgeuse Update: Something Weird Is Happening To The Star - astrophysics